Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 6d023c9 | 1995-01-04 19:12:13 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 25 | /* Compile an expression node to intermediate code */ |
| 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | /* XXX TO DO: |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 28 | XXX Compute maximum needed stack sizes while compiling; |
| 29 | XXX then frame object can be one malloc and no stack checks are needed |
| 30 | XXX add __doc__ attribute == co_doc to code object attributes |
| 31 | XXX don't execute doc string |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 32 | XXX Generate simple jump for break/return outside 'try...finally' |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 33 | XXX get rid of SET_LINENO instructions, use JAR's table trick |
| 34 | XXX (need an option to put them back in, for debugger!) |
| 35 | XXX other JAR tricks? |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 36 | */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 37 | |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 38 | #ifndef NO_PRIVATE_NAME_MANGLING |
| 39 | #define PRIVATE_NAME_MANGLING |
| 40 | #endif |
| 41 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 42 | #include "allobjects.h" |
| 43 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 44 | #include "node.h" |
| 45 | #include "token.h" |
| 46 | #include "graminit.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 47 | #include "compile.h" |
| 48 | #include "opcode.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 49 | #include "structmember.h" |
| 50 | |
| 51 | #include <ctype.h> |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 52 | #include <errno.h> |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 53 | |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 54 | #define OP_DELETE 0 |
| 55 | #define OP_ASSIGN 1 |
| 56 | #define OP_APPLY 2 |
| 57 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 58 | #define OFF(x) offsetof(codeobject, x) |
| 59 | |
| 60 | static struct memberlist code_memberlist[] = { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 61 | {"co_argcount", T_INT, OFF(co_argcount), READONLY}, |
| 62 | {"co_nlocals", T_INT, OFF(co_nlocals), READONLY}, |
| 63 | {"co_flags", T_INT, OFF(co_flags), READONLY}, |
Guido van Rossum | 39d942d | 1992-01-12 02:30:05 +0000 | [diff] [blame] | 64 | {"co_code", T_OBJECT, OFF(co_code), READONLY}, |
| 65 | {"co_consts", T_OBJECT, OFF(co_consts), READONLY}, |
| 66 | {"co_names", T_OBJECT, OFF(co_names), READONLY}, |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 67 | {"co_varnames", T_OBJECT, OFF(co_varnames), READONLY}, |
Guido van Rossum | 39d942d | 1992-01-12 02:30:05 +0000 | [diff] [blame] | 68 | {"co_filename", T_OBJECT, OFF(co_filename), READONLY}, |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 69 | {"co_name", T_OBJECT, OFF(co_name), READONLY}, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 70 | {NULL} /* Sentinel */ |
| 71 | }; |
| 72 | |
| 73 | static object * |
| 74 | code_getattr(co, name) |
| 75 | codeobject *co; |
| 76 | char *name; |
| 77 | { |
| 78 | return getmember((char *)co, code_memberlist, name); |
| 79 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 80 | |
| 81 | static void |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 82 | code_dealloc(co) |
| 83 | codeobject *co; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 84 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 85 | XDECREF(co->co_code); |
| 86 | XDECREF(co->co_consts); |
| 87 | XDECREF(co->co_names); |
| 88 | XDECREF(co->co_filename); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 89 | XDECREF(co->co_name); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 90 | XDECREF(co->co_varnames); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 91 | DEL(co); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 92 | } |
| 93 | |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 94 | static object * |
| 95 | code_repr(co) |
| 96 | codeobject *co; |
| 97 | { |
| 98 | char buf[500]; |
| 99 | int lineno = -1; |
| 100 | char *p = GETSTRINGVALUE(co->co_code); |
| 101 | char *filename = "???"; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 102 | char *name = "???"; |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 103 | if (*p == SET_LINENO) |
| 104 | lineno = (p[1] & 0xff) | ((p[2] & 0xff) << 8); |
| 105 | if (co->co_filename && is_stringobject(co->co_filename)) |
| 106 | filename = getstringvalue(co->co_filename); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 107 | if (co->co_name && is_stringobject(co->co_name)) |
| 108 | name = getstringvalue(co->co_name); |
| 109 | sprintf(buf, "<code object %.100s at %lx, file \"%.300s\", line %d>", |
| 110 | name, (long)co, filename, lineno); |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 111 | return newstringobject(buf); |
| 112 | } |
| 113 | |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 114 | static int |
| 115 | code_compare(co, cp) |
| 116 | codeobject *co, *cp; |
| 117 | { |
| 118 | int cmp; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 119 | cmp = cp->co_argcount - cp->co_argcount; |
| 120 | if (cmp) return cmp; |
| 121 | cmp = cp->co_nlocals - cp->co_nlocals; |
| 122 | if (cmp) return cmp; |
| 123 | cmp = cp->co_flags - cp->co_flags; |
| 124 | if (cmp) return cmp; |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 125 | cmp = cmpobject((object *)co->co_code, (object *)cp->co_code); |
| 126 | if (cmp) return cmp; |
| 127 | cmp = cmpobject(co->co_consts, cp->co_consts); |
| 128 | if (cmp) return cmp; |
| 129 | cmp = cmpobject(co->co_names, cp->co_names); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 130 | if (cmp) return cmp; |
| 131 | cmp = cmpobject(co->co_varnames, cp->co_varnames); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 132 | return cmp; |
| 133 | } |
| 134 | |
| 135 | static long |
| 136 | code_hash(co) |
| 137 | codeobject *co; |
| 138 | { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 139 | long h, h1, h2, h3, h4; |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 140 | h1 = hashobject((object *)co->co_code); |
| 141 | if (h1 == -1) return -1; |
| 142 | h2 = hashobject(co->co_consts); |
| 143 | if (h2 == -1) return -1; |
| 144 | h3 = hashobject(co->co_names); |
| 145 | if (h3 == -1) return -1; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 146 | h4 = hashobject(co->co_varnames); |
| 147 | if (h4 == -1) return -1; |
| 148 | h = h1 ^ h2 ^ h3 ^ h4 ^ |
| 149 | co->co_argcount ^ co->co_nlocals ^ co->co_flags; |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 150 | if (h == -1) h = -2; |
| 151 | return h; |
| 152 | } |
| 153 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 154 | typeobject Codetype = { |
| 155 | OB_HEAD_INIT(&Typetype) |
| 156 | 0, |
| 157 | "code", |
| 158 | sizeof(codeobject), |
| 159 | 0, |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 160 | (destructor)code_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 161 | 0, /*tp_print*/ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 162 | (getattrfunc)code_getattr, /*tp_getattr*/ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 163 | 0, /*tp_setattr*/ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 164 | (cmpfunc)code_compare, /*tp_compare*/ |
| 165 | (reprfunc)code_repr, /*tp_repr*/ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 166 | 0, /*tp_as_number*/ |
| 167 | 0, /*tp_as_sequence*/ |
| 168 | 0, /*tp_as_mapping*/ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 169 | (hashfunc)code_hash, /*tp_hash*/ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 170 | }; |
| 171 | |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 172 | codeobject * |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 173 | newcodeobject(argcount, nlocals, flags, |
| 174 | code, consts, names, varnames, filename, name) |
| 175 | int argcount; |
| 176 | int nlocals; |
| 177 | int flags; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 178 | object *code; |
| 179 | object *consts; |
| 180 | object *names; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 181 | object *varnames; |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 182 | object *filename; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 183 | object *name; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 184 | { |
| 185 | codeobject *co; |
| 186 | int i; |
| 187 | /* Check argument types */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 188 | if (argcount < 0 || nlocals < 0 || |
| 189 | code == NULL || !is_stringobject(code) || |
| 190 | consts == NULL || !is_tupleobject(consts) || |
| 191 | names == NULL || !is_tupleobject(names) || |
| 192 | varnames == NULL || !is_tupleobject(varnames) || |
| 193 | name == NULL || !is_stringobject(name) || |
| 194 | filename == NULL || !is_stringobject(filename)) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 195 | err_badcall(); |
| 196 | return NULL; |
| 197 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 198 | /* Make sure names and varnames are all strings */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 199 | for (i = gettuplesize(names); --i >= 0; ) { |
| 200 | object *v = gettupleitem(names, i); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 201 | if (v == NULL || !is_stringobject(v)) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 202 | err_badcall(); |
| 203 | return NULL; |
| 204 | } |
| 205 | } |
| 206 | for (i = gettuplesize(varnames); --i >= 0; ) { |
| 207 | object *v = gettupleitem(varnames, i); |
| 208 | if (v == NULL || !is_stringobject(v)) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 209 | err_badcall(); |
| 210 | return NULL; |
| 211 | } |
| 212 | } |
| 213 | co = NEWOBJ(codeobject, &Codetype); |
| 214 | if (co != NULL) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 215 | co->co_argcount = argcount; |
| 216 | co->co_nlocals = nlocals; |
| 217 | co->co_flags = flags; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 218 | INCREF(code); |
| 219 | co->co_code = (stringobject *)code; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 220 | INCREF(consts); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 221 | co->co_consts = consts; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 222 | INCREF(names); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 223 | co->co_names = names; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 224 | INCREF(varnames); |
| 225 | co->co_varnames = varnames; |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 226 | INCREF(filename); |
| 227 | co->co_filename = filename; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 228 | INCREF(name); |
| 229 | co->co_name = name; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 230 | } |
| 231 | return co; |
| 232 | } |
| 233 | |
| 234 | |
| 235 | /* Data structure used internally */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 236 | |
| 237 | #define MAXBLOCKS 20 /* Max static block nesting within a function */ |
| 238 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 239 | struct compiling { |
| 240 | object *c_code; /* string */ |
| 241 | object *c_consts; /* list of objects */ |
| 242 | object *c_names; /* list of strings (names) */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 243 | object *c_globals; /* dictionary (value=None) */ |
| 244 | object *c_locals; /* dictionary (value=localID) */ |
| 245 | object *c_varnames; /* list (inverse of c_locals) */ |
| 246 | int c_nlocals; /* index of next local */ |
| 247 | int c_argcount; /* number of top-level arguments */ |
| 248 | int c_flags; /* same as co_flags */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 249 | int c_nexti; /* index into c_code */ |
| 250 | int c_errors; /* counts errors occurred */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 251 | int c_infunction; /* set when compiling a function */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 252 | int c_interactive; /* generating code for interactive command */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 253 | int c_loops; /* counts nested loops */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 254 | int c_begin; /* begin of current loop, for 'continue' */ |
| 255 | int c_block[MAXBLOCKS]; /* stack of block types */ |
| 256 | int c_nblocks; /* current block stack level */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 257 | char *c_filename; /* filename of current node */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 258 | char *c_name; /* name of object (e.g. function) */ |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 259 | #ifdef PRIVATE_NAME_MANGLING |
| 260 | char *c_private; /* for private name mangling */ |
| 261 | #endif |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 262 | }; |
| 263 | |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 264 | |
| 265 | /* Interface to the block stack */ |
| 266 | |
| 267 | static void |
| 268 | block_push(c, type) |
| 269 | struct compiling *c; |
| 270 | int type; |
| 271 | { |
| 272 | if (c->c_nblocks >= MAXBLOCKS) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 273 | err_setstr(SystemError, "too many statically nested blocks"); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 274 | c->c_errors++; |
| 275 | } |
| 276 | else { |
| 277 | c->c_block[c->c_nblocks++] = type; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | static void |
| 282 | block_pop(c, type) |
| 283 | struct compiling *c; |
| 284 | int type; |
| 285 | { |
| 286 | if (c->c_nblocks > 0) |
| 287 | c->c_nblocks--; |
| 288 | if (c->c_block[c->c_nblocks] != type && c->c_errors == 0) { |
| 289 | err_setstr(SystemError, "bad block pop"); |
| 290 | c->c_errors++; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 295 | /* Prototype forward declarations */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 296 | |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 297 | static int com_init PROTO((struct compiling *, char *)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 298 | static void com_free PROTO((struct compiling *)); |
| 299 | static void com_done PROTO((struct compiling *)); |
| 300 | static void com_node PROTO((struct compiling *, struct _node *)); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 301 | static void com_factor PROTO((struct compiling *, struct _node *)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 302 | static void com_addbyte PROTO((struct compiling *, int)); |
| 303 | static void com_addint PROTO((struct compiling *, int)); |
| 304 | static void com_addoparg PROTO((struct compiling *, int, int)); |
| 305 | static void com_addfwref PROTO((struct compiling *, int, int *)); |
| 306 | static void com_backpatch PROTO((struct compiling *, int)); |
| 307 | static int com_add PROTO((struct compiling *, object *, object *)); |
| 308 | static int com_addconst PROTO((struct compiling *, object *)); |
| 309 | static int com_addname PROTO((struct compiling *, object *)); |
| 310 | static void com_addopname PROTO((struct compiling *, int, node *)); |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 311 | static void com_list PROTO((struct compiling *, node *, int)); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 312 | static int com_argdefs PROTO((struct compiling *, node *)); |
| 313 | static int com_newlocal PROTO((struct compiling *, char *)); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 314 | static codeobject *icompile PROTO((struct _node *, struct compiling *)); |
| 315 | static codeobject *jcompile PROTO((struct _node *, char *, struct compiling *)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 316 | |
| 317 | static int |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 318 | com_init(c, filename) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 319 | struct compiling *c; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 320 | char *filename; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 321 | { |
Guido van Rossum | 62d4624 | 1991-04-03 19:00:23 +0000 | [diff] [blame] | 322 | if ((c->c_code = newsizedstringobject((char *)NULL, 1000)) == NULL) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 323 | goto fail_3; |
| 324 | if ((c->c_consts = newlistobject(0)) == NULL) |
| 325 | goto fail_2; |
| 326 | if ((c->c_names = newlistobject(0)) == NULL) |
| 327 | goto fail_1; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 328 | if ((c->c_globals = newdictobject()) == NULL) |
| 329 | goto fail_0; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 330 | if ((c->c_locals = newdictobject()) == NULL) |
| 331 | goto fail_00; |
| 332 | if ((c->c_varnames = newlistobject(0)) == NULL) |
| 333 | goto fail_000; |
| 334 | c->c_nlocals = 0; |
| 335 | c->c_argcount = 0; |
| 336 | c->c_flags = 0; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 337 | c->c_nexti = 0; |
| 338 | c->c_errors = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 339 | c->c_infunction = 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 340 | c->c_interactive = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 341 | c->c_loops = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 342 | c->c_begin = 0; |
| 343 | c->c_nblocks = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 344 | c->c_filename = filename; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 345 | c->c_name = "?"; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 346 | return 1; |
| 347 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 348 | fail_000: |
| 349 | DECREF(c->c_locals); |
| 350 | fail_00: |
| 351 | DECREF(c->c_globals); |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 352 | fail_0: |
| 353 | DECREF(c->c_names); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 354 | fail_1: |
| 355 | DECREF(c->c_consts); |
| 356 | fail_2: |
| 357 | DECREF(c->c_code); |
| 358 | fail_3: |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static void |
| 363 | com_free(c) |
| 364 | struct compiling *c; |
| 365 | { |
| 366 | XDECREF(c->c_code); |
| 367 | XDECREF(c->c_consts); |
| 368 | XDECREF(c->c_names); |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 369 | XDECREF(c->c_globals); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 370 | XDECREF(c->c_locals); |
| 371 | XDECREF(c->c_varnames); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | static void |
| 375 | com_done(c) |
| 376 | struct compiling *c; |
| 377 | { |
| 378 | if (c->c_code != NULL) |
| 379 | resizestring(&c->c_code, c->c_nexti); |
| 380 | } |
| 381 | |
| 382 | static void |
| 383 | com_addbyte(c, byte) |
| 384 | struct compiling *c; |
| 385 | int byte; |
| 386 | { |
| 387 | int len; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 388 | /*fprintf(stderr, "%3d: %3d\n", c->c_nexti, byte);*/ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 389 | if (byte < 0 || byte > 255) { |
Guido van Rossum | 01cfd44 | 1991-10-20 20:12:38 +0000 | [diff] [blame] | 390 | /* |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 391 | fprintf(stderr, "XXX compiling bad byte: %d\n", byte); |
Guido van Rossum | 1ae940a | 1995-01-02 19:04:15 +0000 | [diff] [blame] | 392 | fatal("com_addbyte: byte out of range"); |
Guido van Rossum | 01cfd44 | 1991-10-20 20:12:38 +0000 | [diff] [blame] | 393 | */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 394 | err_setstr(SystemError, "com_addbyte: byte out of range"); |
| 395 | c->c_errors++; |
| 396 | } |
| 397 | if (c->c_code == NULL) |
| 398 | return; |
| 399 | len = getstringsize(c->c_code); |
| 400 | if (c->c_nexti >= len) { |
| 401 | if (resizestring(&c->c_code, len+1000) != 0) { |
| 402 | c->c_errors++; |
| 403 | return; |
| 404 | } |
| 405 | } |
| 406 | getstringvalue(c->c_code)[c->c_nexti++] = byte; |
| 407 | } |
| 408 | |
| 409 | static void |
| 410 | com_addint(c, x) |
| 411 | struct compiling *c; |
| 412 | int x; |
| 413 | { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 414 | com_addbyte(c, x & 0xff); |
| 415 | com_addbyte(c, x >> 8); /* XXX x should be positive */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | static void |
| 419 | com_addoparg(c, op, arg) |
| 420 | struct compiling *c; |
| 421 | int op; |
| 422 | int arg; |
| 423 | { |
| 424 | com_addbyte(c, op); |
| 425 | com_addint(c, arg); |
| 426 | } |
| 427 | |
| 428 | static void |
| 429 | com_addfwref(c, op, p_anchor) |
| 430 | struct compiling *c; |
| 431 | int op; |
| 432 | int *p_anchor; |
| 433 | { |
| 434 | /* Compile a forward reference for backpatching */ |
| 435 | int here; |
| 436 | int anchor; |
| 437 | com_addbyte(c, op); |
| 438 | here = c->c_nexti; |
| 439 | anchor = *p_anchor; |
| 440 | *p_anchor = here; |
| 441 | com_addint(c, anchor == 0 ? 0 : here - anchor); |
| 442 | } |
| 443 | |
| 444 | static void |
| 445 | com_backpatch(c, anchor) |
| 446 | struct compiling *c; |
| 447 | int anchor; /* Must be nonzero */ |
| 448 | { |
| 449 | unsigned char *code = (unsigned char *) getstringvalue(c->c_code); |
| 450 | int target = c->c_nexti; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 451 | int dist; |
| 452 | int prev; |
| 453 | for (;;) { |
| 454 | /* Make the JUMP instruction at anchor point to target */ |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 455 | prev = code[anchor] + (code[anchor+1] << 8); |
| 456 | dist = target - (anchor+2); |
| 457 | code[anchor] = dist & 0xff; |
| 458 | code[anchor+1] = dist >> 8; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 459 | if (!prev) |
| 460 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 461 | anchor -= prev; |
| 462 | } |
| 463 | } |
| 464 | |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 465 | /* Handle literals and names uniformly */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 466 | |
| 467 | static int |
| 468 | com_add(c, list, v) |
| 469 | struct compiling *c; |
| 470 | object *list; |
| 471 | object *v; |
| 472 | { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 473 | int n = getlistsize(list); |
| 474 | int i; |
| 475 | for (i = n; --i >= 0; ) { |
| 476 | object *w = getlistitem(list, i); |
Guido van Rossum | efc0bd0 | 1991-07-01 18:44:20 +0000 | [diff] [blame] | 477 | if (v->ob_type == w->ob_type && cmpobject(v, w) == 0) |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 478 | return i; |
| 479 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 480 | if (addlistitem(list, v) != 0) |
| 481 | c->c_errors++; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 482 | return n; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | static int |
| 486 | com_addconst(c, v) |
| 487 | struct compiling *c; |
| 488 | object *v; |
| 489 | { |
| 490 | return com_add(c, c->c_consts, v); |
| 491 | } |
| 492 | |
| 493 | static int |
| 494 | com_addname(c, v) |
| 495 | struct compiling *c; |
| 496 | object *v; |
| 497 | { |
| 498 | return com_add(c, c->c_names, v); |
| 499 | } |
| 500 | |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 501 | #ifdef PRIVATE_NAME_MANGLING |
| 502 | static int |
| 503 | com_mangle(c, name, buffer, maxlen) |
| 504 | struct compiling *c; |
| 505 | char *name; |
| 506 | char *buffer; |
| 507 | int maxlen; |
| 508 | { |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 509 | /* Name mangling: __private becomes _classname__private. |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 510 | This is independent from how the name is used. */ |
| 511 | char *p; |
| 512 | int nlen, plen; |
| 513 | nlen = strlen(name); |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 514 | if (nlen+2 >= maxlen) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 515 | return 0; /* Don't mangle __extremely_long_names */ |
| 516 | if (name[nlen-1] == '_' && name[nlen-2] == '_') |
| 517 | return 0; /* Don't mangle __whatever__ */ |
| 518 | p = c->c_private; |
| 519 | /* Strip leading underscores from class name */ |
| 520 | while (*p == '_') |
| 521 | p++; |
| 522 | if (*p == '\0') |
| 523 | return 0; /* Don't mangle if class is just underscores */ |
| 524 | plen = strlen(p); |
| 525 | if (plen + nlen >= maxlen) |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 526 | plen = maxlen-nlen-2; /* Truncate class name if too long */ |
| 527 | /* buffer = "_" + p[:plen] + name # i.e. 1+plen+nlen bytes */ |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 528 | buffer[0] = '_'; |
| 529 | strncpy(buffer+1, p, plen); |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 530 | strcpy(buffer+1+plen, name); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 531 | /* fprintf(stderr, "mangle %s -> %s\n", name, buffer); */ |
| 532 | return 1; |
| 533 | } |
| 534 | #endif |
| 535 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 536 | static void |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 537 | com_addopnamestr(c, op, name) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 538 | struct compiling *c; |
| 539 | int op; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 540 | char *name; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 541 | { |
| 542 | object *v; |
| 543 | int i; |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 544 | #ifdef PRIVATE_NAME_MANGLING |
| 545 | char buffer[256]; |
| 546 | if (name != NULL && name[0] == '_' && name[1] == '_' && |
| 547 | c->c_private != NULL && |
| 548 | com_mangle(c, name, buffer, (int)sizeof(buffer))) |
| 549 | name = buffer; |
| 550 | #endif |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 551 | if (name == NULL || (v = newstringobject(name)) == NULL) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 552 | c->c_errors++; |
| 553 | i = 255; |
| 554 | } |
| 555 | else { |
| 556 | i = com_addname(c, v); |
| 557 | DECREF(v); |
| 558 | } |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 559 | /* Hack to replace *_NAME opcodes by *_GLOBAL if necessary */ |
| 560 | switch (op) { |
| 561 | case LOAD_NAME: |
| 562 | case STORE_NAME: |
| 563 | case DELETE_NAME: |
| 564 | if (dictlookup(c->c_globals, name) != NULL) { |
| 565 | switch (op) { |
| 566 | case LOAD_NAME: op = LOAD_GLOBAL; break; |
| 567 | case STORE_NAME: op = STORE_GLOBAL; break; |
| 568 | case DELETE_NAME: op = DELETE_GLOBAL; break; |
| 569 | } |
| 570 | } |
| 571 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 572 | com_addoparg(c, op, i); |
| 573 | } |
| 574 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 575 | static void |
| 576 | com_addopname(c, op, n) |
| 577 | struct compiling *c; |
| 578 | int op; |
| 579 | node *n; |
| 580 | { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 581 | char *name; |
| 582 | char buffer[1000]; |
| 583 | /* XXX it is possible to write this code without the 1000 |
| 584 | chars on the total length of dotted names, I just can't be |
| 585 | bothered right now */ |
| 586 | if (TYPE(n) == STAR) |
| 587 | name = "*"; |
| 588 | else if (TYPE(n) == dotted_name) { |
| 589 | char *p = buffer; |
| 590 | int i; |
| 591 | name = buffer; |
| 592 | for (i = 0; i < NCH(n); i += 2) { |
| 593 | char *s = STR(CHILD(n, i)); |
| 594 | if (p + strlen(s) > buffer + (sizeof buffer) - 2) { |
| 595 | err_setstr(MemoryError, |
| 596 | "dotted_name too long"); |
Guido van Rossum | d9dfaf5 | 1995-02-17 15:04:57 +0000 | [diff] [blame] | 597 | name = NULL; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 598 | break; |
| 599 | } |
| 600 | if (p != buffer) |
| 601 | *p++ = '.'; |
| 602 | strcpy(p, s); |
| 603 | p = strchr(p, '\0'); |
| 604 | } |
| 605 | } |
| 606 | else { |
| 607 | REQ(n, NAME); |
| 608 | name = STR(n); |
| 609 | } |
| 610 | com_addopnamestr(c, op, name); |
| 611 | } |
| 612 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 613 | static object * |
| 614 | parsenumber(s) |
| 615 | char *s; |
| 616 | { |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 617 | extern long mystrtol PROTO((const char *, char **, int)); |
| 618 | extern unsigned long mystrtoul PROTO((const char *, char **, int)); |
| 619 | extern double atof PROTO((const char *)); |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 620 | char *end; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 621 | long x; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 622 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | 530956d | 1996-07-21 02:27:43 +0000 | [diff] [blame] | 623 | Py_complex c; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 624 | int imflag; |
| 625 | #endif |
| 626 | |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 627 | errno = 0; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 628 | end = s + strlen(s) - 1; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 629 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | 15ad9a6 | 1996-01-26 20:53:56 +0000 | [diff] [blame] | 630 | imflag = *end == 'j' || *end == 'J'; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 631 | #endif |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 632 | if (*end == 'l' || *end == 'L') |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 633 | return long_scan(s, 0); |
Guido van Rossum | acbefef | 1992-01-19 16:33:51 +0000 | [diff] [blame] | 634 | if (s[0] == '0') |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 635 | x = (long) mystrtoul(s, &end, 0); |
Guido van Rossum | acbefef | 1992-01-19 16:33:51 +0000 | [diff] [blame] | 636 | else |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 637 | x = mystrtol(s, &end, 0); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 638 | if (*end == '\0') { |
| 639 | if (errno != 0) { |
Guido van Rossum | efb087b | 1991-12-16 15:41:41 +0000 | [diff] [blame] | 640 | err_setstr(OverflowError, |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 641 | "integer literal too large"); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 642 | return NULL; |
| 643 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 644 | return newintobject(x); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 645 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 646 | /* XXX Huge floats may silently fail */ |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 647 | #ifndef WITHOUT_COMPLEX |
| 648 | if (imflag) { |
| 649 | c.real = 0.; |
| 650 | c.imag = atof(s); |
| 651 | return newcomplexobject(c); |
| 652 | } |
| 653 | else |
| 654 | #endif |
| 655 | return newfloatobject(atof(s)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | static object * |
| 659 | parsestr(s) |
| 660 | char *s; |
| 661 | { |
| 662 | object *v; |
| 663 | int len; |
| 664 | char *buf; |
| 665 | char *p; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 666 | char *end; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 667 | int c; |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 668 | int quote = *s; |
| 669 | if (quote != '\'' && quote != '\"') { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 670 | err_badcall(); |
| 671 | return NULL; |
| 672 | } |
| 673 | s++; |
| 674 | len = strlen(s); |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 675 | if (s[--len] != quote) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 676 | err_badcall(); |
| 677 | return NULL; |
| 678 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 679 | if (len >= 4 && s[0] == quote && s[1] == quote) { |
| 680 | s += 2; |
| 681 | len -= 2; |
| 682 | if (s[--len] != quote || s[--len] != quote) { |
| 683 | err_badcall(); |
| 684 | return NULL; |
| 685 | } |
| 686 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 687 | if (strchr(s, '\\') == NULL) |
| 688 | return newsizedstringobject(s, len); |
| 689 | v = newsizedstringobject((char *)NULL, len); |
| 690 | p = buf = getstringvalue(v); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 691 | end = s + len; |
| 692 | while (s < end) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 693 | if (*s != '\\') { |
| 694 | *p++ = *s++; |
| 695 | continue; |
| 696 | } |
| 697 | s++; |
| 698 | switch (*s++) { |
| 699 | /* XXX This assumes ASCII! */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 700 | case '\n': break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 701 | case '\\': *p++ = '\\'; break; |
| 702 | case '\'': *p++ = '\''; break; |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 703 | case '\"': *p++ = '\"'; break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 704 | case 'b': *p++ = '\b'; break; |
| 705 | case 'f': *p++ = '\014'; break; /* FF */ |
| 706 | case 't': *p++ = '\t'; break; |
| 707 | case 'n': *p++ = '\n'; break; |
| 708 | case 'r': *p++ = '\r'; break; |
| 709 | case 'v': *p++ = '\013'; break; /* VT */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 710 | case 'a': *p++ = '\007'; break; /* BEL, not classic C */ |
| 711 | case '0': case '1': case '2': case '3': |
| 712 | case '4': case '5': case '6': case '7': |
| 713 | c = s[-1] - '0'; |
| 714 | if ('0' <= *s && *s <= '7') { |
| 715 | c = (c<<3) + *s++ - '0'; |
| 716 | if ('0' <= *s && *s <= '7') |
| 717 | c = (c<<3) + *s++ - '0'; |
| 718 | } |
| 719 | *p++ = c; |
| 720 | break; |
| 721 | case 'x': |
Guido van Rossum | 7f7f274 | 1995-02-10 17:01:56 +0000 | [diff] [blame] | 722 | if (isxdigit(Py_CHARMASK(*s))) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 723 | sscanf(s, "%x", &c); |
| 724 | *p++ = c; |
| 725 | do { |
| 726 | s++; |
Guido van Rossum | 7f7f274 | 1995-02-10 17:01:56 +0000 | [diff] [blame] | 727 | } while (isxdigit(Py_CHARMASK(*s))); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 728 | break; |
| 729 | } |
| 730 | /* FALLTHROUGH */ |
| 731 | default: *p++ = '\\'; *p++ = s[-1]; break; |
| 732 | } |
| 733 | } |
| 734 | resizestring(&v, (int)(p - buf)); |
| 735 | return v; |
| 736 | } |
| 737 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 738 | static object * |
| 739 | parsestrplus(n) |
| 740 | node *n; |
| 741 | { |
| 742 | object *v; |
| 743 | int i; |
| 744 | REQ(CHILD(n, 0), STRING); |
| 745 | if ((v = parsestr(STR(CHILD(n, 0)))) != NULL) { |
| 746 | /* String literal concatenation */ |
| 747 | for (i = 1; i < NCH(n) && v != NULL; i++) { |
| 748 | joinstring_decref(&v, parsestr(STR(CHILD(n, i)))); |
| 749 | } |
| 750 | } |
| 751 | return v; |
| 752 | } |
| 753 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 754 | static void |
| 755 | com_list_constructor(c, n) |
| 756 | struct compiling *c; |
| 757 | node *n; |
| 758 | { |
| 759 | int len; |
| 760 | int i; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 761 | if (TYPE(n) != testlist) |
| 762 | REQ(n, exprlist); |
| 763 | /* exprlist: expr (',' expr)* [',']; likewise for testlist */ |
| 764 | len = (NCH(n) + 1) / 2; |
| 765 | for (i = 0; i < NCH(n); i += 2) |
| 766 | com_node(c, CHILD(n, i)); |
| 767 | com_addoparg(c, BUILD_LIST, len); |
| 768 | } |
| 769 | |
| 770 | static void |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 771 | com_dictmaker(c, n) |
| 772 | struct compiling *c; |
| 773 | node *n; |
| 774 | { |
| 775 | int i; |
| 776 | /* dictmaker: test ':' test (',' test ':' value)* [','] */ |
| 777 | for (i = 0; i+2 < NCH(n); i += 4) { |
| 778 | /* We must arrange things just right for STORE_SUBSCR. |
| 779 | It wants the stack to look like (value) (dict) (key) */ |
| 780 | com_addbyte(c, DUP_TOP); |
| 781 | com_node(c, CHILD(n, i+2)); /* value */ |
| 782 | com_addbyte(c, ROT_TWO); |
| 783 | com_node(c, CHILD(n, i)); /* key */ |
| 784 | com_addbyte(c, STORE_SUBSCR); |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 789 | com_atom(c, n) |
| 790 | struct compiling *c; |
| 791 | node *n; |
| 792 | { |
| 793 | node *ch; |
| 794 | object *v; |
| 795 | int i; |
| 796 | REQ(n, atom); |
| 797 | ch = CHILD(n, 0); |
| 798 | switch (TYPE(ch)) { |
| 799 | case LPAR: |
| 800 | if (TYPE(CHILD(n, 1)) == RPAR) |
| 801 | com_addoparg(c, BUILD_TUPLE, 0); |
| 802 | else |
| 803 | com_node(c, CHILD(n, 1)); |
| 804 | break; |
| 805 | case LSQB: |
| 806 | if (TYPE(CHILD(n, 1)) == RSQB) |
| 807 | com_addoparg(c, BUILD_LIST, 0); |
| 808 | else |
| 809 | com_list_constructor(c, CHILD(n, 1)); |
| 810 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 811 | case LBRACE: /* '{' [dictmaker] '}' */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 812 | com_addoparg(c, BUILD_MAP, 0); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 813 | if (TYPE(CHILD(n, 1)) != RBRACE) |
| 814 | com_dictmaker(c, CHILD(n, 1)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 815 | break; |
| 816 | case BACKQUOTE: |
| 817 | com_node(c, CHILD(n, 1)); |
| 818 | com_addbyte(c, UNARY_CONVERT); |
| 819 | break; |
| 820 | case NUMBER: |
| 821 | if ((v = parsenumber(STR(ch))) == NULL) { |
| 822 | c->c_errors++; |
| 823 | i = 255; |
| 824 | } |
| 825 | else { |
| 826 | i = com_addconst(c, v); |
| 827 | DECREF(v); |
| 828 | } |
| 829 | com_addoparg(c, LOAD_CONST, i); |
| 830 | break; |
| 831 | case STRING: |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 832 | v = parsestrplus(n); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 833 | if (v == NULL) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 834 | c->c_errors++; |
| 835 | i = 255; |
| 836 | } |
| 837 | else { |
| 838 | i = com_addconst(c, v); |
| 839 | DECREF(v); |
| 840 | } |
| 841 | com_addoparg(c, LOAD_CONST, i); |
| 842 | break; |
| 843 | case NAME: |
| 844 | com_addopname(c, LOAD_NAME, ch); |
| 845 | break; |
| 846 | default: |
| 847 | fprintf(stderr, "node type %d\n", TYPE(ch)); |
| 848 | err_setstr(SystemError, "com_atom: unexpected node type"); |
| 849 | c->c_errors++; |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | static void |
| 854 | com_slice(c, n, op) |
| 855 | struct compiling *c; |
| 856 | node *n; |
| 857 | int op; |
| 858 | { |
| 859 | if (NCH(n) == 1) { |
| 860 | com_addbyte(c, op); |
| 861 | } |
| 862 | else if (NCH(n) == 2) { |
| 863 | if (TYPE(CHILD(n, 0)) != COLON) { |
| 864 | com_node(c, CHILD(n, 0)); |
| 865 | com_addbyte(c, op+1); |
| 866 | } |
| 867 | else { |
| 868 | com_node(c, CHILD(n, 1)); |
| 869 | com_addbyte(c, op+2); |
| 870 | } |
| 871 | } |
| 872 | else { |
| 873 | com_node(c, CHILD(n, 0)); |
| 874 | com_node(c, CHILD(n, 2)); |
| 875 | com_addbyte(c, op+3); |
| 876 | } |
| 877 | } |
| 878 | |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 879 | static int |
| 880 | com_argument(c, n, inkeywords) |
| 881 | struct compiling *c; |
| 882 | node *n; /* argument */ |
| 883 | int inkeywords; |
| 884 | { |
| 885 | node *m; |
| 886 | REQ(n, argument); /* [test '='] test; really [ keyword '='] keyword */ |
| 887 | if (NCH(n) == 1) { |
| 888 | if (inkeywords) { |
| 889 | err_setstr(SyntaxError, |
| 890 | "non-keyword arg after keyword arg"); |
| 891 | c->c_errors++; |
| 892 | } |
| 893 | else { |
| 894 | com_node(c, CHILD(n, 0)); |
| 895 | } |
| 896 | return 0; |
| 897 | } |
| 898 | m = n; |
| 899 | do { |
| 900 | m = CHILD(m, 0); |
| 901 | } while (NCH(m) == 1); |
| 902 | if (TYPE(m) != NAME) { |
| 903 | err_setstr(SyntaxError, "keyword can't be an expression"); |
| 904 | c->c_errors++; |
| 905 | } |
| 906 | else { |
| 907 | object *v = newstringobject(STR(m)); |
| 908 | if (v == NULL) |
| 909 | c->c_errors++; |
| 910 | else { |
| 911 | com_addoparg(c, LOAD_CONST, com_addconst(c, v)); |
| 912 | DECREF(v); |
| 913 | } |
| 914 | } |
| 915 | com_node(c, CHILD(n, 2)); |
| 916 | return 1; |
| 917 | } |
| 918 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 919 | static void |
| 920 | com_call_function(c, n) |
| 921 | struct compiling *c; |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 922 | node *n; /* EITHER arglist OR ')' */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 923 | { |
| 924 | if (TYPE(n) == RPAR) { |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 925 | com_addoparg(c, CALL_FUNCTION, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 926 | } |
| 927 | else { |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 928 | int inkeywords, i, na, nk; |
| 929 | REQ(n, arglist); |
| 930 | inkeywords = 0; |
| 931 | na = 0; |
| 932 | nk = 0; |
| 933 | for (i = 0; i < NCH(n); i += 2) { |
| 934 | inkeywords = com_argument(c, CHILD(n, i), inkeywords); |
| 935 | if (!inkeywords) |
| 936 | na++; |
| 937 | else |
| 938 | nk++; |
| 939 | } |
| 940 | if (na > 255 || nk > 255) { |
| 941 | err_setstr(SyntaxError, "more than 255 arguments"); |
| 942 | c->c_errors++; |
| 943 | } |
| 944 | com_addoparg(c, CALL_FUNCTION, na | (nk << 8)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 945 | } |
| 946 | } |
| 947 | |
| 948 | static void |
| 949 | com_select_member(c, n) |
| 950 | struct compiling *c; |
| 951 | node *n; |
| 952 | { |
| 953 | com_addopname(c, LOAD_ATTR, n); |
| 954 | } |
| 955 | |
| 956 | static void |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 957 | com_sliceobj(c, n) |
| 958 | struct compiling *c; |
| 959 | node *n; |
| 960 | { |
| 961 | int i=0; |
| 962 | int ns=2; /* number of slice arguments */ |
| 963 | int first_missing=0; |
| 964 | node *ch; |
| 965 | |
| 966 | /* first argument */ |
| 967 | if (TYPE(CHILD(n,i)) == COLON) { |
| 968 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 969 | i++; |
| 970 | } |
| 971 | else { |
| 972 | com_node(c, CHILD(n,i)); |
| 973 | i++; |
| 974 | REQ(CHILD(n,i),COLON); |
| 975 | i++; |
| 976 | } |
| 977 | /* second argument */ |
| 978 | if (i < NCH(n) && TYPE(CHILD(n,i)) == test) { |
| 979 | com_node(c, CHILD(n,i)); |
| 980 | i++; |
| 981 | } |
| 982 | else com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 983 | /* remaining arguments */ |
| 984 | for (; i < NCH(n); i++) { |
| 985 | ns++; |
| 986 | ch=CHILD(n,i); |
| 987 | REQ(ch, sliceop); |
| 988 | if (NCH(ch) == 1) { |
| 989 | /* right argument of ':' missing */ |
| 990 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 991 | } |
| 992 | else |
| 993 | com_node(c, CHILD(ch,1)); |
| 994 | } |
| 995 | com_addoparg(c, BUILD_SLICE, ns); |
| 996 | } |
| 997 | |
| 998 | static void |
| 999 | com_subscript(c, n) |
| 1000 | struct compiling *c; |
| 1001 | node *n; |
| 1002 | { |
| 1003 | node *ch; |
| 1004 | REQ(n, subscript); |
| 1005 | ch = CHILD(n,0); |
| 1006 | /* check for rubber index */ |
| 1007 | if (TYPE(ch) == DOT && TYPE(CHILD(n,1)) == DOT) |
| 1008 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_Ellipses)); |
| 1009 | else { |
| 1010 | /* check for slice */ |
| 1011 | if ((TYPE(ch) == COLON || NCH(n) > 1)) |
| 1012 | com_sliceobj(c, n); |
| 1013 | else { |
| 1014 | REQ(ch, test); |
| 1015 | com_node(c, ch); |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | static void |
| 1021 | com_subscriptlist(c, n, assigning) |
| 1022 | struct compiling *c; |
| 1023 | node *n; |
| 1024 | int assigning; |
| 1025 | { |
| 1026 | int i, op; |
| 1027 | REQ(n, subscriptlist); |
| 1028 | /* Check to make backward compatible slice behavior for '[i:j]' */ |
| 1029 | if (NCH(n) == 1) { |
| 1030 | node *sub = CHILD(n, 0); /* subscript */ |
| 1031 | /* Make it is a simple slice. |
| 1032 | should have exactly one colon. */ |
| 1033 | if ((TYPE(CHILD(sub, 0)) == COLON |
| 1034 | || (NCH(sub) > 1 && TYPE(CHILD(sub, 1)) == COLON)) |
| 1035 | && (TYPE(CHILD(sub,NCH(sub)-1)) != sliceop)) { |
| 1036 | if (assigning == OP_APPLY) |
| 1037 | op = SLICE; |
| 1038 | else |
| 1039 | op = ((assigning == OP_ASSIGN) ? STORE_SLICE : DELETE_SLICE); |
| 1040 | com_slice(c, sub, op); |
| 1041 | return; |
| 1042 | } |
| 1043 | } |
| 1044 | /* Else normal subscriptlist. Compile each subscript. */ |
| 1045 | for (i = 0; i < NCH(n); i += 2) |
| 1046 | com_subscript(c, CHILD(n, i)); |
| 1047 | /* Put multiple subscripts into a tuple */ |
| 1048 | if (NCH(n) > 1) |
| 1049 | com_addoparg(c, BUILD_TUPLE, (NCH(n)+1) / 2); |
| 1050 | if (assigning == OP_APPLY) |
| 1051 | op = BINARY_SUBSCR; |
| 1052 | else |
| 1053 | op = ((assigning == OP_ASSIGN) ? STORE_SUBSCR : DELETE_SUBSCR); |
| 1054 | com_addbyte(c, op); |
| 1055 | } |
| 1056 | |
| 1057 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1058 | com_apply_trailer(c, n) |
| 1059 | struct compiling *c; |
| 1060 | node *n; |
| 1061 | { |
| 1062 | REQ(n, trailer); |
| 1063 | switch (TYPE(CHILD(n, 0))) { |
| 1064 | case LPAR: |
| 1065 | com_call_function(c, CHILD(n, 1)); |
| 1066 | break; |
| 1067 | case DOT: |
| 1068 | com_select_member(c, CHILD(n, 1)); |
| 1069 | break; |
| 1070 | case LSQB: |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1071 | com_subscriptlist(c, CHILD(n, 1), OP_APPLY); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1072 | break; |
| 1073 | default: |
| 1074 | err_setstr(SystemError, |
| 1075 | "com_apply_trailer: unknown trailer type"); |
| 1076 | c->c_errors++; |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | static void |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1081 | com_power(c, n) |
| 1082 | struct compiling *c; |
| 1083 | node *n; |
| 1084 | { |
| 1085 | int i; |
| 1086 | REQ(n, power); |
| 1087 | com_atom(c, CHILD(n, 0)); |
| 1088 | for (i = 1; i < NCH(n); i++) { |
| 1089 | if (TYPE(CHILD(n, i)) == DOUBLESTAR) { |
| 1090 | com_factor(c, CHILD(n, i+1)); |
| 1091 | com_addbyte(c, BINARY_POWER); |
| 1092 | break; |
| 1093 | } |
| 1094 | else |
| 1095 | com_apply_trailer(c, CHILD(n, i)); |
| 1096 | } |
| 1097 | } |
| 1098 | |
| 1099 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1100 | com_factor(c, n) |
| 1101 | struct compiling *c; |
| 1102 | node *n; |
| 1103 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1104 | REQ(n, factor); |
| 1105 | if (TYPE(CHILD(n, 0)) == PLUS) { |
| 1106 | com_factor(c, CHILD(n, 1)); |
| 1107 | com_addbyte(c, UNARY_POSITIVE); |
| 1108 | } |
| 1109 | else if (TYPE(CHILD(n, 0)) == MINUS) { |
| 1110 | com_factor(c, CHILD(n, 1)); |
| 1111 | com_addbyte(c, UNARY_NEGATIVE); |
| 1112 | } |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1113 | else if (TYPE(CHILD(n, 0)) == TILDE) { |
| 1114 | com_factor(c, CHILD(n, 1)); |
| 1115 | com_addbyte(c, UNARY_INVERT); |
| 1116 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1117 | else { |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1118 | com_power(c, CHILD(n, 0)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | static void |
| 1123 | com_term(c, n) |
| 1124 | struct compiling *c; |
| 1125 | node *n; |
| 1126 | { |
| 1127 | int i; |
| 1128 | int op; |
| 1129 | REQ(n, term); |
| 1130 | com_factor(c, CHILD(n, 0)); |
| 1131 | for (i = 2; i < NCH(n); i += 2) { |
| 1132 | com_factor(c, CHILD(n, i)); |
| 1133 | switch (TYPE(CHILD(n, i-1))) { |
| 1134 | case STAR: |
| 1135 | op = BINARY_MULTIPLY; |
| 1136 | break; |
| 1137 | case SLASH: |
| 1138 | op = BINARY_DIVIDE; |
| 1139 | break; |
| 1140 | case PERCENT: |
| 1141 | op = BINARY_MODULO; |
| 1142 | break; |
| 1143 | default: |
| 1144 | err_setstr(SystemError, |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1145 | "com_term: operator not *, / or %"); |
| 1146 | c->c_errors++; |
| 1147 | op = 255; |
| 1148 | } |
| 1149 | com_addbyte(c, op); |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | static void |
| 1154 | com_arith_expr(c, n) |
| 1155 | struct compiling *c; |
| 1156 | node *n; |
| 1157 | { |
| 1158 | int i; |
| 1159 | int op; |
| 1160 | REQ(n, arith_expr); |
| 1161 | com_term(c, CHILD(n, 0)); |
| 1162 | for (i = 2; i < NCH(n); i += 2) { |
| 1163 | com_term(c, CHILD(n, i)); |
| 1164 | switch (TYPE(CHILD(n, i-1))) { |
| 1165 | case PLUS: |
| 1166 | op = BINARY_ADD; |
| 1167 | break; |
| 1168 | case MINUS: |
| 1169 | op = BINARY_SUBTRACT; |
| 1170 | break; |
| 1171 | default: |
| 1172 | err_setstr(SystemError, |
| 1173 | "com_arith_expr: operator not + or -"); |
| 1174 | c->c_errors++; |
| 1175 | op = 255; |
| 1176 | } |
| 1177 | com_addbyte(c, op); |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | static void |
| 1182 | com_shift_expr(c, n) |
| 1183 | struct compiling *c; |
| 1184 | node *n; |
| 1185 | { |
| 1186 | int i; |
| 1187 | int op; |
| 1188 | REQ(n, shift_expr); |
| 1189 | com_arith_expr(c, CHILD(n, 0)); |
| 1190 | for (i = 2; i < NCH(n); i += 2) { |
| 1191 | com_arith_expr(c, CHILD(n, i)); |
| 1192 | switch (TYPE(CHILD(n, i-1))) { |
| 1193 | case LEFTSHIFT: |
| 1194 | op = BINARY_LSHIFT; |
| 1195 | break; |
| 1196 | case RIGHTSHIFT: |
| 1197 | op = BINARY_RSHIFT; |
| 1198 | break; |
| 1199 | default: |
| 1200 | err_setstr(SystemError, |
| 1201 | "com_shift_expr: operator not << or >>"); |
| 1202 | c->c_errors++; |
| 1203 | op = 255; |
| 1204 | } |
| 1205 | com_addbyte(c, op); |
| 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | static void |
| 1210 | com_and_expr(c, n) |
| 1211 | struct compiling *c; |
| 1212 | node *n; |
| 1213 | { |
| 1214 | int i; |
| 1215 | int op; |
| 1216 | REQ(n, and_expr); |
| 1217 | com_shift_expr(c, CHILD(n, 0)); |
| 1218 | for (i = 2; i < NCH(n); i += 2) { |
| 1219 | com_shift_expr(c, CHILD(n, i)); |
| 1220 | if (TYPE(CHILD(n, i-1)) == AMPER) { |
| 1221 | op = BINARY_AND; |
| 1222 | } |
| 1223 | else { |
| 1224 | err_setstr(SystemError, |
| 1225 | "com_and_expr: operator not &"); |
| 1226 | c->c_errors++; |
| 1227 | op = 255; |
| 1228 | } |
| 1229 | com_addbyte(c, op); |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | static void |
| 1234 | com_xor_expr(c, n) |
| 1235 | struct compiling *c; |
| 1236 | node *n; |
| 1237 | { |
| 1238 | int i; |
| 1239 | int op; |
| 1240 | REQ(n, xor_expr); |
| 1241 | com_and_expr(c, CHILD(n, 0)); |
| 1242 | for (i = 2; i < NCH(n); i += 2) { |
| 1243 | com_and_expr(c, CHILD(n, i)); |
| 1244 | if (TYPE(CHILD(n, i-1)) == CIRCUMFLEX) { |
| 1245 | op = BINARY_XOR; |
| 1246 | } |
| 1247 | else { |
| 1248 | err_setstr(SystemError, |
| 1249 | "com_xor_expr: operator not ^"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1250 | c->c_errors++; |
| 1251 | op = 255; |
| 1252 | } |
| 1253 | com_addbyte(c, op); |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | static void |
| 1258 | com_expr(c, n) |
| 1259 | struct compiling *c; |
| 1260 | node *n; |
| 1261 | { |
| 1262 | int i; |
| 1263 | int op; |
| 1264 | REQ(n, expr); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1265 | com_xor_expr(c, CHILD(n, 0)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1266 | for (i = 2; i < NCH(n); i += 2) { |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1267 | com_xor_expr(c, CHILD(n, i)); |
| 1268 | if (TYPE(CHILD(n, i-1)) == VBAR) { |
| 1269 | op = BINARY_OR; |
| 1270 | } |
| 1271 | else { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1272 | err_setstr(SystemError, |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1273 | "com_expr: expr operator not |"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1274 | c->c_errors++; |
| 1275 | op = 255; |
| 1276 | } |
| 1277 | com_addbyte(c, op); |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | static enum cmp_op |
| 1282 | cmp_type(n) |
| 1283 | node *n; |
| 1284 | { |
| 1285 | REQ(n, comp_op); |
Guido van Rossum | 01cfd44 | 1991-10-20 20:12:38 +0000 | [diff] [blame] | 1286 | /* comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1287 | | 'in' | 'not' 'in' | 'is' | 'is' not' */ |
| 1288 | if (NCH(n) == 1) { |
| 1289 | n = CHILD(n, 0); |
| 1290 | switch (TYPE(n)) { |
| 1291 | case LESS: return LT; |
| 1292 | case GREATER: return GT; |
Guido van Rossum | 01cfd44 | 1991-10-20 20:12:38 +0000 | [diff] [blame] | 1293 | case EQEQUAL: /* == */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1294 | case EQUAL: return EQ; |
Guido van Rossum | 01cfd44 | 1991-10-20 20:12:38 +0000 | [diff] [blame] | 1295 | case LESSEQUAL: return LE; |
| 1296 | case GREATEREQUAL: return GE; |
| 1297 | case NOTEQUAL: return NE; /* <> or != */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1298 | case NAME: if (strcmp(STR(n), "in") == 0) return IN; |
| 1299 | if (strcmp(STR(n), "is") == 0) return IS; |
| 1300 | } |
| 1301 | } |
| 1302 | else if (NCH(n) == 2) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1303 | switch (TYPE(CHILD(n, 0))) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1304 | case NAME: if (strcmp(STR(CHILD(n, 1)), "in") == 0) |
| 1305 | return NOT_IN; |
| 1306 | if (strcmp(STR(CHILD(n, 0)), "is") == 0) |
| 1307 | return IS_NOT; |
| 1308 | } |
| 1309 | } |
| 1310 | return BAD; |
| 1311 | } |
| 1312 | |
| 1313 | static void |
| 1314 | com_comparison(c, n) |
| 1315 | struct compiling *c; |
| 1316 | node *n; |
| 1317 | { |
| 1318 | int i; |
| 1319 | enum cmp_op op; |
| 1320 | int anchor; |
| 1321 | REQ(n, comparison); /* comparison: expr (comp_op expr)* */ |
| 1322 | com_expr(c, CHILD(n, 0)); |
| 1323 | if (NCH(n) == 1) |
| 1324 | return; |
| 1325 | |
| 1326 | /**************************************************************** |
| 1327 | The following code is generated for all but the last |
| 1328 | comparison in a chain: |
| 1329 | |
| 1330 | label: on stack: opcode: jump to: |
| 1331 | |
| 1332 | a <code to load b> |
| 1333 | a, b DUP_TOP |
| 1334 | a, b, b ROT_THREE |
| 1335 | b, a, b COMPARE_OP |
| 1336 | b, 0-or-1 JUMP_IF_FALSE L1 |
| 1337 | b, 1 POP_TOP |
| 1338 | b |
| 1339 | |
| 1340 | We are now ready to repeat this sequence for the next |
| 1341 | comparison in the chain. |
| 1342 | |
| 1343 | For the last we generate: |
| 1344 | |
| 1345 | b <code to load c> |
| 1346 | b, c COMPARE_OP |
| 1347 | 0-or-1 |
| 1348 | |
| 1349 | If there were any jumps to L1 (i.e., there was more than one |
| 1350 | comparison), we generate: |
| 1351 | |
| 1352 | 0-or-1 JUMP_FORWARD L2 |
| 1353 | L1: b, 0 ROT_TWO |
| 1354 | 0, b POP_TOP |
| 1355 | 0 |
| 1356 | L2: |
| 1357 | ****************************************************************/ |
| 1358 | |
| 1359 | anchor = 0; |
| 1360 | |
| 1361 | for (i = 2; i < NCH(n); i += 2) { |
| 1362 | com_expr(c, CHILD(n, i)); |
| 1363 | if (i+2 < NCH(n)) { |
| 1364 | com_addbyte(c, DUP_TOP); |
| 1365 | com_addbyte(c, ROT_THREE); |
| 1366 | } |
| 1367 | op = cmp_type(CHILD(n, i-1)); |
| 1368 | if (op == BAD) { |
| 1369 | err_setstr(SystemError, |
| 1370 | "com_comparison: unknown comparison op"); |
| 1371 | c->c_errors++; |
| 1372 | } |
| 1373 | com_addoparg(c, COMPARE_OP, op); |
| 1374 | if (i+2 < NCH(n)) { |
| 1375 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 1376 | com_addbyte(c, POP_TOP); |
| 1377 | } |
| 1378 | } |
| 1379 | |
| 1380 | if (anchor) { |
| 1381 | int anchor2 = 0; |
| 1382 | com_addfwref(c, JUMP_FORWARD, &anchor2); |
| 1383 | com_backpatch(c, anchor); |
| 1384 | com_addbyte(c, ROT_TWO); |
| 1385 | com_addbyte(c, POP_TOP); |
| 1386 | com_backpatch(c, anchor2); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | static void |
| 1391 | com_not_test(c, n) |
| 1392 | struct compiling *c; |
| 1393 | node *n; |
| 1394 | { |
| 1395 | REQ(n, not_test); /* 'not' not_test | comparison */ |
| 1396 | if (NCH(n) == 1) { |
| 1397 | com_comparison(c, CHILD(n, 0)); |
| 1398 | } |
| 1399 | else { |
| 1400 | com_not_test(c, CHILD(n, 1)); |
| 1401 | com_addbyte(c, UNARY_NOT); |
| 1402 | } |
| 1403 | } |
| 1404 | |
| 1405 | static void |
| 1406 | com_and_test(c, n) |
| 1407 | struct compiling *c; |
| 1408 | node *n; |
| 1409 | { |
| 1410 | int i; |
| 1411 | int anchor; |
| 1412 | REQ(n, and_test); /* not_test ('and' not_test)* */ |
| 1413 | anchor = 0; |
| 1414 | i = 0; |
| 1415 | for (;;) { |
| 1416 | com_not_test(c, CHILD(n, i)); |
| 1417 | if ((i += 2) >= NCH(n)) |
| 1418 | break; |
| 1419 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 1420 | com_addbyte(c, POP_TOP); |
| 1421 | } |
| 1422 | if (anchor) |
| 1423 | com_backpatch(c, anchor); |
| 1424 | } |
| 1425 | |
| 1426 | static void |
| 1427 | com_test(c, n) |
| 1428 | struct compiling *c; |
| 1429 | node *n; |
| 1430 | { |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 1431 | REQ(n, test); /* and_test ('and' and_test)* | lambdef */ |
| 1432 | if (NCH(n) == 1 && TYPE(CHILD(n, 0)) == lambdef) { |
| 1433 | object *v; |
| 1434 | int i; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1435 | int ndefs = com_argdefs(c, CHILD(n, 0)); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1436 | v = (object *) icompile(CHILD(n, 0), c); |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 1437 | if (v == NULL) { |
| 1438 | c->c_errors++; |
| 1439 | i = 255; |
| 1440 | } |
| 1441 | else { |
| 1442 | i = com_addconst(c, v); |
| 1443 | DECREF(v); |
| 1444 | } |
| 1445 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1446 | com_addoparg(c, MAKE_FUNCTION, ndefs); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1447 | } |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 1448 | else { |
| 1449 | int anchor = 0; |
| 1450 | int i = 0; |
| 1451 | for (;;) { |
| 1452 | com_and_test(c, CHILD(n, i)); |
| 1453 | if ((i += 2) >= NCH(n)) |
| 1454 | break; |
| 1455 | com_addfwref(c, JUMP_IF_TRUE, &anchor); |
| 1456 | com_addbyte(c, POP_TOP); |
| 1457 | } |
| 1458 | if (anchor) |
| 1459 | com_backpatch(c, anchor); |
| 1460 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1461 | } |
| 1462 | |
| 1463 | static void |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 1464 | com_list(c, n, toplevel) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1465 | struct compiling *c; |
| 1466 | node *n; |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 1467 | int toplevel; /* If nonzero, *always* build a tuple */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1468 | { |
| 1469 | /* exprlist: expr (',' expr)* [',']; likewise for testlist */ |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 1470 | if (NCH(n) == 1 && !toplevel) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1471 | com_node(c, CHILD(n, 0)); |
| 1472 | } |
| 1473 | else { |
| 1474 | int i; |
| 1475 | int len; |
| 1476 | len = (NCH(n) + 1) / 2; |
| 1477 | for (i = 0; i < NCH(n); i += 2) |
| 1478 | com_node(c, CHILD(n, i)); |
| 1479 | com_addoparg(c, BUILD_TUPLE, len); |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | |
| 1484 | /* Begin of assignment compilation */ |
| 1485 | |
| 1486 | static void com_assign_name PROTO((struct compiling *, node *, int)); |
| 1487 | static void com_assign PROTO((struct compiling *, node *, int)); |
| 1488 | |
| 1489 | static void |
| 1490 | com_assign_attr(c, n, assigning) |
| 1491 | struct compiling *c; |
| 1492 | node *n; |
| 1493 | int assigning; |
| 1494 | { |
| 1495 | com_addopname(c, assigning ? STORE_ATTR : DELETE_ATTR, n); |
| 1496 | } |
| 1497 | |
| 1498 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1499 | com_assign_trailer(c, n, assigning) |
| 1500 | struct compiling *c; |
| 1501 | node *n; |
| 1502 | int assigning; |
| 1503 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1504 | REQ(n, trailer); |
| 1505 | switch (TYPE(CHILD(n, 0))) { |
| 1506 | case LPAR: /* '(' [exprlist] ')' */ |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1507 | err_setstr(SyntaxError, "can't assign to function call"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1508 | c->c_errors++; |
| 1509 | break; |
| 1510 | case DOT: /* '.' NAME */ |
| 1511 | com_assign_attr(c, CHILD(n, 1), assigning); |
| 1512 | break; |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1513 | case LSQB: /* '[' subscriptlist ']' */ |
| 1514 | com_subscriptlist(c, CHILD(n, 1), assigning); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1515 | break; |
| 1516 | default: |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1517 | err_setstr(SystemError, "unknown trailer type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1518 | c->c_errors++; |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | static void |
| 1523 | com_assign_tuple(c, n, assigning) |
| 1524 | struct compiling *c; |
| 1525 | node *n; |
| 1526 | int assigning; |
| 1527 | { |
| 1528 | int i; |
| 1529 | if (TYPE(n) != testlist) |
| 1530 | REQ(n, exprlist); |
| 1531 | if (assigning) |
| 1532 | com_addoparg(c, UNPACK_TUPLE, (NCH(n)+1)/2); |
| 1533 | for (i = 0; i < NCH(n); i += 2) |
| 1534 | com_assign(c, CHILD(n, i), assigning); |
| 1535 | } |
| 1536 | |
| 1537 | static void |
| 1538 | com_assign_list(c, n, assigning) |
| 1539 | struct compiling *c; |
| 1540 | node *n; |
| 1541 | int assigning; |
| 1542 | { |
| 1543 | int i; |
| 1544 | if (assigning) |
| 1545 | com_addoparg(c, UNPACK_LIST, (NCH(n)+1)/2); |
| 1546 | for (i = 0; i < NCH(n); i += 2) |
| 1547 | com_assign(c, CHILD(n, i), assigning); |
| 1548 | } |
| 1549 | |
| 1550 | static void |
| 1551 | com_assign_name(c, n, assigning) |
| 1552 | struct compiling *c; |
| 1553 | node *n; |
| 1554 | int assigning; |
| 1555 | { |
| 1556 | REQ(n, NAME); |
| 1557 | com_addopname(c, assigning ? STORE_NAME : DELETE_NAME, n); |
| 1558 | } |
| 1559 | |
| 1560 | static void |
| 1561 | com_assign(c, n, assigning) |
| 1562 | struct compiling *c; |
| 1563 | node *n; |
| 1564 | int assigning; |
| 1565 | { |
| 1566 | /* Loop to avoid trivial recursion */ |
| 1567 | for (;;) { |
| 1568 | switch (TYPE(n)) { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1569 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1570 | case exprlist: |
| 1571 | case testlist: |
| 1572 | if (NCH(n) > 1) { |
| 1573 | com_assign_tuple(c, n, assigning); |
| 1574 | return; |
| 1575 | } |
| 1576 | n = CHILD(n, 0); |
| 1577 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1578 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1579 | case test: |
| 1580 | case and_test: |
| 1581 | case not_test: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1582 | case comparison: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1583 | case expr: |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1584 | case xor_expr: |
| 1585 | case and_expr: |
| 1586 | case shift_expr: |
| 1587 | case arith_expr: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1588 | case term: |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1589 | case factor: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1590 | if (NCH(n) > 1) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1591 | err_setstr(SyntaxError, |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1592 | "can't assign to operator"); |
| 1593 | c->c_errors++; |
| 1594 | return; |
| 1595 | } |
| 1596 | n = CHILD(n, 0); |
| 1597 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1598 | |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1599 | case power: /* atom trailer* ('**' power)* */ |
| 1600 | /* ('+'|'-'|'~') factor | atom trailer* */ |
| 1601 | if (TYPE(CHILD(n, 0)) != atom) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1602 | err_setstr(SyntaxError, |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1603 | "can't assign to operator"); |
| 1604 | c->c_errors++; |
| 1605 | return; |
| 1606 | } |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1607 | if (NCH(n) > 1) { /* trailer or exponent present */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1608 | int i; |
| 1609 | com_node(c, CHILD(n, 0)); |
| 1610 | for (i = 1; i+1 < NCH(n); i++) { |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1611 | if (TYPE(CHILD(n, i)) == DOUBLESTAR) { |
| 1612 | err_setstr(SyntaxError, |
| 1613 | "can't assign to operator"); |
| 1614 | c->c_errors++; |
| 1615 | return; |
| 1616 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1617 | com_apply_trailer(c, CHILD(n, i)); |
| 1618 | } /* NB i is still alive */ |
| 1619 | com_assign_trailer(c, |
| 1620 | CHILD(n, i), assigning); |
| 1621 | return; |
| 1622 | } |
| 1623 | n = CHILD(n, 0); |
| 1624 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1625 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1626 | case atom: |
| 1627 | switch (TYPE(CHILD(n, 0))) { |
| 1628 | case LPAR: |
| 1629 | n = CHILD(n, 1); |
| 1630 | if (TYPE(n) == RPAR) { |
| 1631 | /* XXX Should allow () = () ??? */ |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1632 | err_setstr(SyntaxError, |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1633 | "can't assign to ()"); |
| 1634 | c->c_errors++; |
| 1635 | return; |
| 1636 | } |
| 1637 | break; |
| 1638 | case LSQB: |
| 1639 | n = CHILD(n, 1); |
| 1640 | if (TYPE(n) == RSQB) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1641 | err_setstr(SyntaxError, |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1642 | "can't assign to []"); |
| 1643 | c->c_errors++; |
| 1644 | return; |
| 1645 | } |
| 1646 | com_assign_list(c, n, assigning); |
| 1647 | return; |
| 1648 | case NAME: |
| 1649 | com_assign_name(c, CHILD(n, 0), assigning); |
| 1650 | return; |
| 1651 | default: |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1652 | err_setstr(SyntaxError, |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 1653 | "can't assign to literal"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1654 | c->c_errors++; |
| 1655 | return; |
| 1656 | } |
| 1657 | break; |
Guido van Rossum | 15cc9a0 | 1996-08-08 18:51:04 +0000 | [diff] [blame] | 1658 | |
| 1659 | case lambdef: |
| 1660 | err_setstr(SyntaxError, "can't assign to lambda"); |
| 1661 | c->c_errors++; |
| 1662 | return; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1663 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1664 | default: |
| 1665 | fprintf(stderr, "node type %d\n", TYPE(n)); |
| 1666 | err_setstr(SystemError, "com_assign: bad node"); |
| 1667 | c->c_errors++; |
| 1668 | return; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1669 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1670 | } |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | static void |
| 1675 | com_expr_stmt(c, n) |
| 1676 | struct compiling *c; |
| 1677 | node *n; |
| 1678 | { |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 1679 | REQ(n, expr_stmt); /* testlist ('=' testlist)* */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1680 | com_node(c, CHILD(n, NCH(n)-1)); |
| 1681 | if (NCH(n) == 1) { |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 1682 | if (c->c_interactive) |
| 1683 | com_addbyte(c, PRINT_EXPR); |
| 1684 | else |
| 1685 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1686 | } |
| 1687 | else { |
| 1688 | int i; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1689 | for (i = 0; i < NCH(n)-2; i+=2) { |
| 1690 | if (i+2 < NCH(n)-2) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1691 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1692 | com_assign(c, CHILD(n, i), OP_ASSIGN); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1693 | } |
| 1694 | } |
| 1695 | } |
| 1696 | |
| 1697 | static void |
| 1698 | com_print_stmt(c, n) |
| 1699 | struct compiling *c; |
| 1700 | node *n; |
| 1701 | { |
| 1702 | int i; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1703 | REQ(n, print_stmt); /* 'print' (test ',')* [test] */ |
| 1704 | for (i = 1; i < NCH(n); i += 2) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1705 | com_node(c, CHILD(n, i)); |
| 1706 | com_addbyte(c, PRINT_ITEM); |
| 1707 | } |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1708 | if (TYPE(CHILD(n, NCH(n)-1)) != COMMA) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1709 | com_addbyte(c, PRINT_NEWLINE); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1710 | /* XXX Alternatively, LOAD_CONST '\n' and then PRINT_ITEM */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1711 | } |
| 1712 | |
| 1713 | static void |
| 1714 | com_return_stmt(c, n) |
| 1715 | struct compiling *c; |
| 1716 | node *n; |
| 1717 | { |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1718 | REQ(n, return_stmt); /* 'return' [testlist] */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1719 | if (!c->c_infunction) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 1720 | err_setstr(SyntaxError, "'return' outside function"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1721 | c->c_errors++; |
| 1722 | } |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1723 | if (NCH(n) < 2) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1724 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 1725 | else |
| 1726 | com_node(c, CHILD(n, 1)); |
| 1727 | com_addbyte(c, RETURN_VALUE); |
| 1728 | } |
| 1729 | |
| 1730 | static void |
| 1731 | com_raise_stmt(c, n) |
| 1732 | struct compiling *c; |
| 1733 | node *n; |
| 1734 | { |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1735 | REQ(n, raise_stmt); /* 'raise' test [',' test [',' test]] */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1736 | com_node(c, CHILD(n, 1)); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1737 | if (NCH(n) > 3) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1738 | com_node(c, CHILD(n, 3)); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1739 | if (NCH(n) > 5) |
| 1740 | com_node(c, CHILD(n, 5)); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1741 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1742 | com_addoparg(c, RAISE_VARARGS, NCH(n)/2); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1743 | } |
| 1744 | |
| 1745 | static void |
| 1746 | com_import_stmt(c, n) |
| 1747 | struct compiling *c; |
| 1748 | node *n; |
| 1749 | { |
| 1750 | int i; |
| 1751 | REQ(n, import_stmt); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1752 | /* 'import' dotted_name (',' dotted_name)* | |
| 1753 | 'from' dotted_name 'import' ('*' | NAME (',' NAME)*) */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1754 | if (STR(CHILD(n, 0))[0] == 'f') { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1755 | /* 'from' dotted_name 'import' ... */ |
| 1756 | REQ(CHILD(n, 1), dotted_name); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1757 | com_addopname(c, IMPORT_NAME, CHILD(n, 1)); |
| 1758 | for (i = 3; i < NCH(n); i += 2) |
| 1759 | com_addopname(c, IMPORT_FROM, CHILD(n, i)); |
| 1760 | com_addbyte(c, POP_TOP); |
| 1761 | } |
| 1762 | else { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 1763 | /* 'import' ... */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1764 | for (i = 1; i < NCH(n); i += 2) { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1765 | REQ(CHILD(n, i), dotted_name); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1766 | com_addopname(c, IMPORT_NAME, CHILD(n, i)); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1767 | com_addopname(c, STORE_NAME, CHILD(CHILD(n, i), 0)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1768 | } |
| 1769 | } |
| 1770 | } |
| 1771 | |
| 1772 | static void |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1773 | com_global_stmt(c, n) |
| 1774 | struct compiling *c; |
| 1775 | node *n; |
| 1776 | { |
| 1777 | int i; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1778 | REQ(n, global_stmt); |
| 1779 | /* 'global' NAME (',' NAME)* */ |
| 1780 | for (i = 1; i < NCH(n); i += 2) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1781 | char *s = STR(CHILD(n, i)); |
Guido van Rossum | fe2236f | 1996-08-24 07:29:04 +0000 | [diff] [blame] | 1782 | #ifdef PRIVATE_NAME_MANGLING |
| 1783 | char buffer[256]; |
| 1784 | if (s != NULL && s[0] == '_' && s[1] == '_' && |
| 1785 | c->c_private != NULL && |
| 1786 | com_mangle(c, s, buffer, (int)sizeof(buffer))) |
| 1787 | s = buffer; |
| 1788 | #endif |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1789 | if (dictlookup(c->c_locals, s) != NULL) { |
| 1790 | err_setstr(SyntaxError, "name is local and global"); |
| 1791 | c->c_errors++; |
| 1792 | } |
| 1793 | else if (dictinsert(c->c_globals, s, None) != 0) |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1794 | c->c_errors++; |
| 1795 | } |
| 1796 | } |
| 1797 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 1798 | static int |
| 1799 | com_newlocal_o(c, nameval) |
| 1800 | struct compiling *c; |
| 1801 | object *nameval; |
| 1802 | { |
| 1803 | int i; |
| 1804 | object *ival; |
| 1805 | if (getlistsize(c->c_varnames) != c->c_nlocals) { |
| 1806 | /* This is usually caused by an error on a previous call */ |
| 1807 | if (c->c_errors == 0) { |
| 1808 | err_setstr(SystemError, "mixed up var name/index"); |
| 1809 | c->c_errors++; |
| 1810 | } |
| 1811 | return 0; |
| 1812 | } |
| 1813 | ival = newintobject(i = c->c_nlocals++); |
| 1814 | if (ival == NULL) |
| 1815 | c->c_errors++; |
| 1816 | else if (mappinginsert(c->c_locals, nameval, ival) != 0) |
| 1817 | c->c_errors++; |
| 1818 | else if (addlistitem(c->c_varnames, nameval) != 0) |
| 1819 | c->c_errors++; |
| 1820 | XDECREF(ival); |
| 1821 | return i; |
| 1822 | } |
| 1823 | |
| 1824 | static int |
| 1825 | com_addlocal_o(c, nameval) |
| 1826 | struct compiling *c; |
| 1827 | object *nameval; |
| 1828 | { |
| 1829 | object *ival = mappinglookup(c->c_locals, nameval); |
| 1830 | if (ival != NULL) |
| 1831 | return getintvalue(ival); |
| 1832 | return com_newlocal_o(c, nameval); |
| 1833 | } |
| 1834 | |
| 1835 | static int |
| 1836 | com_newlocal(c, name) |
| 1837 | struct compiling *c; |
| 1838 | char *name; |
| 1839 | { |
| 1840 | object *nameval = newstringobject(name); |
| 1841 | int i; |
| 1842 | if (nameval == NULL) { |
| 1843 | c->c_errors++; |
| 1844 | return 0; |
| 1845 | } |
| 1846 | i = com_newlocal_o(c, nameval); |
| 1847 | DECREF(nameval); |
| 1848 | return i; |
| 1849 | } |
| 1850 | |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1851 | #define strequ(a, b) (strcmp((a), (b)) == 0) |
| 1852 | |
Guido van Rossum | 0dfcf75 | 1996-08-12 22:00:53 +0000 | [diff] [blame] | 1853 | #ifdef SUPPORT_OBSOLETE_ACCESS |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1854 | static void |
| 1855 | com_access_stmt(c, n) |
| 1856 | struct compiling *c; |
| 1857 | node *n; |
| 1858 | { |
| 1859 | int i, j, k, mode, imode; |
| 1860 | object *vmode; |
| 1861 | REQ(n, access_stmt); |
| 1862 | /* 'access' NAME (',' NAME)* ':' accesstype (',' accesstype)* |
| 1863 | accesstype: NAME+ */ |
| 1864 | |
| 1865 | /* Find where the colon is */ |
| 1866 | i = 1; |
| 1867 | while (TYPE(CHILD(n,i-1)) != COLON) |
| 1868 | i += 1; |
| 1869 | |
| 1870 | /* Calculate the mode mask */ |
| 1871 | mode = 0; |
| 1872 | for (j = i; j < NCH(n); j += 2) { |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1873 | int r = 0, w = 0, p = 0; |
| 1874 | for (k = 0; k < NCH(CHILD(n,j)); k++) { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1875 | if (strequ(STR(CHILD(CHILD(n,j),k)), "public")) |
| 1876 | p = 0; |
| 1877 | else if (strequ(STR(CHILD(CHILD(n,j),k)), "protected")) |
| 1878 | p = 1; |
| 1879 | else if (strequ(STR(CHILD(CHILD(n,j),k)), "private")) |
| 1880 | p = 2; |
| 1881 | else if (strequ(STR(CHILD(CHILD(n,j),k)), "read")) |
| 1882 | r = 1; |
| 1883 | else if (strequ(STR(CHILD(CHILD(n,j),k)), "write")) |
| 1884 | w = 1; |
| 1885 | else /* XXX should make this an exception */ |
| 1886 | fprintf(stderr, "bad access type %s\n", |
| 1887 | STR(CHILD(CHILD(n,j),k))); |
| 1888 | } |
| 1889 | if (r == 0 && w == 0) |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1890 | r = w = 1; |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1891 | if (p == 0) { |
| 1892 | if (r == 1) mode |= AC_R_PUBLIC; |
| 1893 | if (w == 1) mode |= AC_W_PUBLIC; |
| 1894 | } else if (p == 1) { |
| 1895 | if (r == 1) mode |= AC_R_PROTECTED; |
| 1896 | if (w == 1) mode |= AC_W_PROTECTED; |
| 1897 | } else { |
| 1898 | if (r == 1) mode |= AC_R_PRIVATE; |
| 1899 | if (w == 1) mode |= AC_W_PRIVATE; |
| 1900 | } |
| 1901 | } |
| 1902 | vmode = newintobject((long)mode); |
| 1903 | imode = com_addconst(c, vmode); |
| 1904 | XDECREF(vmode); |
| 1905 | for (i = 1; TYPE(CHILD(n,i-1)) != COLON; i+=2) { |
| 1906 | com_addoparg(c, LOAD_CONST, imode); |
| 1907 | com_addopname(c, ACCESS_MODE, CHILD(n, i)); |
| 1908 | } |
| 1909 | } |
Guido van Rossum | 0dfcf75 | 1996-08-12 22:00:53 +0000 | [diff] [blame] | 1910 | #endif |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1911 | |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1912 | static void |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 1913 | com_exec_stmt(c, n) |
| 1914 | struct compiling *c; |
| 1915 | node *n; |
| 1916 | { |
| 1917 | REQ(n, exec_stmt); |
| 1918 | /* exec_stmt: 'exec' expr ['in' expr [',' expr]] */ |
| 1919 | com_node(c, CHILD(n, 1)); |
| 1920 | if (NCH(n) >= 4) |
| 1921 | com_node(c, CHILD(n, 3)); |
| 1922 | else |
| 1923 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 1924 | if (NCH(n) >= 6) |
| 1925 | com_node(c, CHILD(n, 5)); |
| 1926 | else |
| 1927 | com_addbyte(c, DUP_TOP); |
| 1928 | com_addbyte(c, EXEC_STMT); |
| 1929 | } |
| 1930 | |
| 1931 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1932 | com_if_stmt(c, n) |
| 1933 | struct compiling *c; |
| 1934 | node *n; |
| 1935 | { |
| 1936 | int i; |
| 1937 | int anchor = 0; |
| 1938 | REQ(n, if_stmt); |
| 1939 | /*'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] */ |
| 1940 | for (i = 0; i+3 < NCH(n); i+=4) { |
| 1941 | int a = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1942 | node *ch = CHILD(n, i+1); |
| 1943 | if (i > 0) |
| 1944 | com_addoparg(c, SET_LINENO, ch->n_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1945 | com_node(c, CHILD(n, i+1)); |
| 1946 | com_addfwref(c, JUMP_IF_FALSE, &a); |
| 1947 | com_addbyte(c, POP_TOP); |
| 1948 | com_node(c, CHILD(n, i+3)); |
| 1949 | com_addfwref(c, JUMP_FORWARD, &anchor); |
| 1950 | com_backpatch(c, a); |
| 1951 | com_addbyte(c, POP_TOP); |
| 1952 | } |
| 1953 | if (i+2 < NCH(n)) |
| 1954 | com_node(c, CHILD(n, i+2)); |
| 1955 | com_backpatch(c, anchor); |
| 1956 | } |
| 1957 | |
| 1958 | static void |
| 1959 | com_while_stmt(c, n) |
| 1960 | struct compiling *c; |
| 1961 | node *n; |
| 1962 | { |
| 1963 | int break_anchor = 0; |
| 1964 | int anchor = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1965 | int save_begin = c->c_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1966 | REQ(n, while_stmt); /* 'while' test ':' suite ['else' ':' suite] */ |
| 1967 | com_addfwref(c, SETUP_LOOP, &break_anchor); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1968 | block_push(c, SETUP_LOOP); |
| 1969 | c->c_begin = c->c_nexti; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1970 | com_addoparg(c, SET_LINENO, n->n_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1971 | com_node(c, CHILD(n, 1)); |
| 1972 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 1973 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1974 | c->c_loops++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1975 | com_node(c, CHILD(n, 3)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1976 | c->c_loops--; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1977 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 1978 | c->c_begin = save_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1979 | com_backpatch(c, anchor); |
| 1980 | com_addbyte(c, POP_TOP); |
| 1981 | com_addbyte(c, POP_BLOCK); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1982 | block_pop(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1983 | if (NCH(n) > 4) |
| 1984 | com_node(c, CHILD(n, 6)); |
| 1985 | com_backpatch(c, break_anchor); |
| 1986 | } |
| 1987 | |
| 1988 | static void |
| 1989 | com_for_stmt(c, n) |
| 1990 | struct compiling *c; |
| 1991 | node *n; |
| 1992 | { |
| 1993 | object *v; |
| 1994 | int break_anchor = 0; |
| 1995 | int anchor = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1996 | int save_begin = c->c_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1997 | REQ(n, for_stmt); |
| 1998 | /* 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] */ |
| 1999 | com_addfwref(c, SETUP_LOOP, &break_anchor); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2000 | block_push(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2001 | com_node(c, CHILD(n, 3)); |
| 2002 | v = newintobject(0L); |
| 2003 | if (v == NULL) |
| 2004 | c->c_errors++; |
| 2005 | com_addoparg(c, LOAD_CONST, com_addconst(c, v)); |
| 2006 | XDECREF(v); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2007 | c->c_begin = c->c_nexti; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2008 | com_addoparg(c, SET_LINENO, n->n_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2009 | com_addfwref(c, FOR_LOOP, &anchor); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2010 | com_assign(c, CHILD(n, 1), OP_ASSIGN); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2011 | c->c_loops++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2012 | com_node(c, CHILD(n, 5)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2013 | c->c_loops--; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2014 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 2015 | c->c_begin = save_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2016 | com_backpatch(c, anchor); |
| 2017 | com_addbyte(c, POP_BLOCK); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2018 | block_pop(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2019 | if (NCH(n) > 8) |
| 2020 | com_node(c, CHILD(n, 8)); |
| 2021 | com_backpatch(c, break_anchor); |
| 2022 | } |
| 2023 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2024 | /* Code generated for "try: S finally: Sf" is as follows: |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2025 | |
| 2026 | SETUP_FINALLY L |
| 2027 | <code for S> |
| 2028 | POP_BLOCK |
| 2029 | LOAD_CONST <nil> |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2030 | L: <code for Sf> |
| 2031 | END_FINALLY |
| 2032 | |
| 2033 | The special instructions use the block stack. Each block |
| 2034 | stack entry contains the instruction that created it (here |
| 2035 | SETUP_FINALLY), the level of the value stack at the time the |
| 2036 | block stack entry was created, and a label (here L). |
| 2037 | |
| 2038 | SETUP_FINALLY: |
| 2039 | Pushes the current value stack level and the label |
| 2040 | onto the block stack. |
| 2041 | POP_BLOCK: |
| 2042 | Pops en entry from the block stack, and pops the value |
| 2043 | stack until its level is the same as indicated on the |
| 2044 | block stack. (The label is ignored.) |
| 2045 | END_FINALLY: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2046 | Pops a variable number of entries from the *value* stack |
| 2047 | and re-raises the exception they specify. The number of |
| 2048 | entries popped depends on the (pseudo) exception type. |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2049 | |
| 2050 | The block stack is unwound when an exception is raised: |
| 2051 | when a SETUP_FINALLY entry is found, the exception is pushed |
| 2052 | onto the value stack (and the exception condition is cleared), |
| 2053 | and the interpreter jumps to the label gotten from the block |
| 2054 | stack. |
| 2055 | |
| 2056 | Code generated for "try: S except E1, V1: S1 except E2, V2: S2 ...": |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2057 | (The contents of the value stack is shown in [], with the top |
| 2058 | at the right; 'tb' is trace-back info, 'val' the exception's |
| 2059 | associated value, and 'exc' the exception.) |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2060 | |
| 2061 | Value stack Label Instruction Argument |
| 2062 | [] SETUP_EXCEPT L1 |
| 2063 | [] <code for S> |
| 2064 | [] POP_BLOCK |
| 2065 | [] JUMP_FORWARD L0 |
| 2066 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2067 | [tb, val, exc] L1: DUP ) |
| 2068 | [tb, val, exc, exc] <evaluate E1> ) |
| 2069 | [tb, val, exc, exc, E1] COMPARE_OP EXC_MATCH ) only if E1 |
| 2070 | [tb, val, exc, 1-or-0] JUMP_IF_FALSE L2 ) |
| 2071 | [tb, val, exc, 1] POP ) |
| 2072 | [tb, val, exc] POP |
| 2073 | [tb, val] <assign to V1> (or POP if no V1) |
| 2074 | [tb] POP |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2075 | [] <code for S1> |
| 2076 | JUMP_FORWARD L0 |
| 2077 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2078 | [tb, val, exc, 0] L2: POP |
| 2079 | [tb, val, exc] DUP |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2080 | .............................etc....................... |
| 2081 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2082 | [tb, val, exc, 0] Ln+1: POP |
| 2083 | [tb, val, exc] END_FINALLY # re-raise exception |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2084 | |
| 2085 | [] L0: <next statement> |
| 2086 | |
| 2087 | Of course, parts are not generated if Vi or Ei is not present. |
| 2088 | */ |
| 2089 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2090 | static void |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2091 | com_try_except(c, n) |
| 2092 | struct compiling *c; |
| 2093 | node *n; |
| 2094 | { |
| 2095 | int except_anchor = 0; |
| 2096 | int end_anchor = 0; |
| 2097 | int else_anchor = 0; |
| 2098 | int i; |
| 2099 | node *ch; |
| 2100 | |
| 2101 | com_addfwref(c, SETUP_EXCEPT, &except_anchor); |
| 2102 | block_push(c, SETUP_EXCEPT); |
| 2103 | com_node(c, CHILD(n, 2)); |
| 2104 | com_addbyte(c, POP_BLOCK); |
| 2105 | block_pop(c, SETUP_EXCEPT); |
| 2106 | com_addfwref(c, JUMP_FORWARD, &else_anchor); |
| 2107 | com_backpatch(c, except_anchor); |
| 2108 | for (i = 3; |
| 2109 | i < NCH(n) && TYPE(ch = CHILD(n, i)) == except_clause; |
| 2110 | i += 3) { |
| 2111 | /* except_clause: 'except' [expr [',' expr]] */ |
| 2112 | if (except_anchor == 0) { |
| 2113 | err_setstr(SyntaxError, |
| 2114 | "default 'except:' must be last"); |
| 2115 | c->c_errors++; |
| 2116 | break; |
| 2117 | } |
| 2118 | except_anchor = 0; |
| 2119 | com_addoparg(c, SET_LINENO, ch->n_lineno); |
| 2120 | if (NCH(ch) > 1) { |
| 2121 | com_addbyte(c, DUP_TOP); |
| 2122 | com_node(c, CHILD(ch, 1)); |
| 2123 | com_addoparg(c, COMPARE_OP, EXC_MATCH); |
| 2124 | com_addfwref(c, JUMP_IF_FALSE, &except_anchor); |
| 2125 | com_addbyte(c, POP_TOP); |
| 2126 | } |
| 2127 | com_addbyte(c, POP_TOP); |
| 2128 | if (NCH(ch) > 3) |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2129 | com_assign(c, CHILD(ch, 3), OP_ASSIGN); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2130 | else |
| 2131 | com_addbyte(c, POP_TOP); |
| 2132 | com_addbyte(c, POP_TOP); |
| 2133 | com_node(c, CHILD(n, i+2)); |
| 2134 | com_addfwref(c, JUMP_FORWARD, &end_anchor); |
| 2135 | if (except_anchor) { |
| 2136 | com_backpatch(c, except_anchor); |
| 2137 | com_addbyte(c, POP_TOP); |
| 2138 | } |
| 2139 | } |
| 2140 | com_addbyte(c, END_FINALLY); |
| 2141 | com_backpatch(c, else_anchor); |
| 2142 | if (i < NCH(n)) |
| 2143 | com_node(c, CHILD(n, i+2)); |
| 2144 | com_backpatch(c, end_anchor); |
| 2145 | } |
| 2146 | |
| 2147 | static void |
| 2148 | com_try_finally(c, n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2149 | struct compiling *c; |
| 2150 | node *n; |
| 2151 | { |
| 2152 | int finally_anchor = 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2153 | node *ch; |
Guido van Rossum | 94fb82e | 1992-04-05 14:24:50 +0000 | [diff] [blame] | 2154 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2155 | com_addfwref(c, SETUP_FINALLY, &finally_anchor); |
| 2156 | block_push(c, SETUP_FINALLY); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2157 | com_node(c, CHILD(n, 2)); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2158 | com_addbyte(c, POP_BLOCK); |
| 2159 | block_pop(c, SETUP_FINALLY); |
| 2160 | block_push(c, END_FINALLY); |
| 2161 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 2162 | com_backpatch(c, finally_anchor); |
| 2163 | ch = CHILD(n, NCH(n)-1); |
| 2164 | com_addoparg(c, SET_LINENO, ch->n_lineno); |
| 2165 | com_node(c, ch); |
| 2166 | com_addbyte(c, END_FINALLY); |
| 2167 | block_pop(c, END_FINALLY); |
| 2168 | } |
| 2169 | |
| 2170 | static void |
| 2171 | com_try_stmt(c, n) |
| 2172 | struct compiling *c; |
| 2173 | node *n; |
| 2174 | { |
| 2175 | REQ(n, try_stmt); |
| 2176 | /* 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 2177 | | 'try' ':' suite 'finally' ':' suite */ |
| 2178 | if (TYPE(CHILD(n, 3)) != except_clause) |
| 2179 | com_try_finally(c, n); |
| 2180 | else |
| 2181 | com_try_except(c, n); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2182 | } |
| 2183 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2184 | static object * |
| 2185 | get_docstring(n) |
| 2186 | node *n; |
| 2187 | { |
Guido van Rossum | 164d4ff | 1995-01-26 00:40:09 +0000 | [diff] [blame] | 2188 | int i; |
| 2189 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2190 | switch (TYPE(n)) { |
| 2191 | |
| 2192 | case suite: |
| 2193 | if (NCH(n) == 1) |
| 2194 | return get_docstring(CHILD(n, 0)); |
| 2195 | else { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2196 | for (i = 0; i < NCH(n); i++) { |
| 2197 | node *ch = CHILD(n, i); |
| 2198 | if (TYPE(ch) == stmt) |
| 2199 | return get_docstring(ch); |
| 2200 | } |
| 2201 | } |
| 2202 | break; |
| 2203 | |
Guido van Rossum | 164d4ff | 1995-01-26 00:40:09 +0000 | [diff] [blame] | 2204 | case file_input: |
| 2205 | for (i = 0; i < NCH(n); i++) { |
| 2206 | node *ch = CHILD(n, i); |
| 2207 | if (TYPE(ch) == stmt) |
| 2208 | return get_docstring(ch); |
| 2209 | } |
| 2210 | break; |
| 2211 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2212 | case stmt: |
| 2213 | case simple_stmt: |
| 2214 | case small_stmt: |
| 2215 | return get_docstring(CHILD(n, 0)); |
| 2216 | |
| 2217 | case expr_stmt: |
| 2218 | case testlist: |
| 2219 | case test: |
| 2220 | case and_test: |
| 2221 | case not_test: |
| 2222 | case comparison: |
| 2223 | case expr: |
| 2224 | case xor_expr: |
| 2225 | case and_expr: |
| 2226 | case shift_expr: |
| 2227 | case arith_expr: |
| 2228 | case term: |
| 2229 | case factor: |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2230 | case power: |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2231 | if (NCH(n) == 1) |
| 2232 | return get_docstring(CHILD(n, 0)); |
| 2233 | break; |
| 2234 | |
| 2235 | case atom: |
| 2236 | if (TYPE(CHILD(n, 0)) == STRING) |
| 2237 | return parsestrplus(n); |
| 2238 | break; |
| 2239 | |
| 2240 | } |
| 2241 | return NULL; |
| 2242 | } |
| 2243 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2244 | static void |
| 2245 | com_suite(c, n) |
| 2246 | struct compiling *c; |
| 2247 | node *n; |
| 2248 | { |
| 2249 | REQ(n, suite); |
| 2250 | /* simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT */ |
| 2251 | if (NCH(n) == 1) { |
| 2252 | com_node(c, CHILD(n, 0)); |
| 2253 | } |
| 2254 | else { |
| 2255 | int i; |
| 2256 | for (i = 0; i < NCH(n); i++) { |
| 2257 | node *ch = CHILD(n, i); |
| 2258 | if (TYPE(ch) == stmt) |
| 2259 | com_node(c, ch); |
| 2260 | } |
| 2261 | } |
| 2262 | } |
| 2263 | |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 2264 | /* ARGSUSED */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2265 | static void |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2266 | com_continue_stmt(c, n) |
| 2267 | struct compiling *c; |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 2268 | node *n; /* Not used, but passed for consistency */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2269 | { |
| 2270 | int i = c->c_nblocks; |
| 2271 | if (i-- > 0 && c->c_block[i] == SETUP_LOOP) { |
| 2272 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 2273 | } |
| 2274 | else { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 2275 | err_setstr(SyntaxError, "'continue' not properly in loop"); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2276 | c->c_errors++; |
| 2277 | } |
| 2278 | /* XXX Could allow it inside a 'finally' clause |
| 2279 | XXX if we could pop the exception still on the stack */ |
| 2280 | } |
| 2281 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2282 | static int |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2283 | com_argdefs(c, n) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2284 | struct compiling *c; |
| 2285 | node *n; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2286 | { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2287 | int i, nch, nargs, ndefs; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2288 | if (TYPE(n) == lambdef) { |
| 2289 | /* lambdef: 'lambda' [varargslist] ':' test */ |
| 2290 | n = CHILD(n, 1); |
| 2291 | } |
| 2292 | else { |
| 2293 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ... */ |
| 2294 | n = CHILD(n, 2); |
| 2295 | REQ(n, parameters); /* parameters: '(' [varargslist] ')' */ |
| 2296 | n = CHILD(n, 1); |
| 2297 | } |
| 2298 | if (TYPE(n) != varargslist) |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2299 | return 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2300 | /* varargslist: |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2301 | (fpdef ['=' test] ',')* '*' ....... | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2302 | fpdef ['=' test] (',' fpdef ['=' test])* [','] */ |
| 2303 | nch = NCH(n); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2304 | nargs = 0; |
| 2305 | ndefs = 0; |
| 2306 | for (i = 0; i < nch; i++) { |
| 2307 | int t; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2308 | if (TYPE(CHILD(n, i)) == STAR || TYPE(CHILD(n, i)) == DOUBLESTAR) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 2309 | break; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2310 | nargs++; |
| 2311 | i++; |
| 2312 | if (i >= nch) |
Guido van Rossum | a1e7e62 | 1995-09-18 21:44:04 +0000 | [diff] [blame] | 2313 | t = RPAR; /* Anything except EQUAL or COMMA */ |
| 2314 | else |
| 2315 | t = TYPE(CHILD(n, i)); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2316 | if (t == EQUAL) { |
| 2317 | i++; |
| 2318 | ndefs++; |
| 2319 | com_node(c, CHILD(n, i)); |
| 2320 | i++; |
| 2321 | if (i >= nch) |
| 2322 | break; |
| 2323 | t = TYPE(CHILD(n, i)); |
| 2324 | } |
| 2325 | else { |
| 2326 | /* Treat "(a=1, b)" as "(a=1, b=None)" */ |
| 2327 | if (ndefs) { |
| 2328 | com_addoparg(c, LOAD_CONST, |
| 2329 | com_addconst(c, None)); |
| 2330 | ndefs++; |
| 2331 | } |
| 2332 | } |
| 2333 | if (t != COMMA) |
| 2334 | break; |
| 2335 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2336 | return ndefs; |
| 2337 | } |
| 2338 | |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2339 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2340 | com_funcdef(c, n) |
| 2341 | struct compiling *c; |
| 2342 | node *n; |
| 2343 | { |
| 2344 | object *v; |
| 2345 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ':' suite */ |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 2346 | v = (object *)icompile(n, c); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2347 | if (v == NULL) |
| 2348 | c->c_errors++; |
| 2349 | else { |
| 2350 | int i = com_addconst(c, v); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2351 | int ndefs = com_argdefs(c, n); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2352 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2353 | com_addoparg(c, MAKE_FUNCTION, ndefs); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2354 | com_addopname(c, STORE_NAME, CHILD(n, 1)); |
| 2355 | DECREF(v); |
| 2356 | } |
| 2357 | } |
| 2358 | |
| 2359 | static void |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2360 | com_bases(c, n) |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 2361 | struct compiling *c; |
| 2362 | node *n; |
| 2363 | { |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 2364 | int i; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 2365 | REQ(n, testlist); |
| 2366 | /* testlist: test (',' test)* [','] */ |
| 2367 | for (i = 0; i < NCH(n); i += 2) |
| 2368 | com_node(c, CHILD(n, i)); |
| 2369 | com_addoparg(c, BUILD_TUPLE, (NCH(n)+1) / 2); |
| 2370 | } |
| 2371 | |
| 2372 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2373 | com_classdef(c, n) |
| 2374 | struct compiling *c; |
| 2375 | node *n; |
| 2376 | { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2377 | int i; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2378 | object *v; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2379 | REQ(n, classdef); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2380 | /* classdef: class NAME ['(' testlist ')'] ':' suite */ |
| 2381 | if ((v = newstringobject(STR(CHILD(n, 1)))) == NULL) { |
| 2382 | c->c_errors++; |
| 2383 | return; |
| 2384 | } |
| 2385 | /* Push the class name on the stack */ |
| 2386 | i = com_addconst(c, v); |
| 2387 | com_addoparg(c, LOAD_CONST, i); |
| 2388 | DECREF(v); |
| 2389 | /* Push the tuple of base classes on the stack */ |
| 2390 | if (TYPE(CHILD(n, 2)) != LPAR) |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 2391 | com_addoparg(c, BUILD_TUPLE, 0); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2392 | else |
| 2393 | com_bases(c, CHILD(n, 3)); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 2394 | v = (object *)icompile(n, c); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2395 | if (v == NULL) |
| 2396 | c->c_errors++; |
| 2397 | else { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2398 | i = com_addconst(c, v); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2399 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2400 | com_addoparg(c, MAKE_FUNCTION, 0); |
| 2401 | com_addoparg(c, CALL_FUNCTION, 0); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2402 | com_addbyte(c, BUILD_CLASS); |
| 2403 | com_addopname(c, STORE_NAME, CHILD(n, 1)); |
| 2404 | DECREF(v); |
| 2405 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2406 | } |
| 2407 | |
| 2408 | static void |
| 2409 | com_node(c, n) |
| 2410 | struct compiling *c; |
| 2411 | node *n; |
| 2412 | { |
| 2413 | switch (TYPE(n)) { |
| 2414 | |
| 2415 | /* Definition nodes */ |
| 2416 | |
| 2417 | case funcdef: |
| 2418 | com_funcdef(c, n); |
| 2419 | break; |
| 2420 | case classdef: |
| 2421 | com_classdef(c, n); |
| 2422 | break; |
| 2423 | |
| 2424 | /* Trivial parse tree nodes */ |
| 2425 | |
| 2426 | case stmt: |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2427 | case small_stmt: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2428 | case flow_stmt: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2429 | com_node(c, CHILD(n, 0)); |
| 2430 | break; |
| 2431 | |
| 2432 | case simple_stmt: |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2433 | /* small_stmt (';' small_stmt)* [';'] NEWLINE */ |
| 2434 | com_addoparg(c, SET_LINENO, n->n_lineno); |
| 2435 | { |
| 2436 | int i; |
| 2437 | for (i = 0; i < NCH(n)-1; i += 2) |
| 2438 | com_node(c, CHILD(n, i)); |
| 2439 | } |
| 2440 | break; |
| 2441 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2442 | case compound_stmt: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2443 | com_addoparg(c, SET_LINENO, n->n_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2444 | com_node(c, CHILD(n, 0)); |
| 2445 | break; |
| 2446 | |
| 2447 | /* Statement nodes */ |
| 2448 | |
| 2449 | case expr_stmt: |
| 2450 | com_expr_stmt(c, n); |
| 2451 | break; |
| 2452 | case print_stmt: |
| 2453 | com_print_stmt(c, n); |
| 2454 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2455 | case del_stmt: /* 'del' exprlist */ |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2456 | com_assign(c, CHILD(n, 1), OP_DELETE); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2457 | break; |
| 2458 | case pass_stmt: |
| 2459 | break; |
| 2460 | case break_stmt: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2461 | if (c->c_loops == 0) { |
Guido van Rossum | 598fd8c | 1992-01-26 18:12:03 +0000 | [diff] [blame] | 2462 | err_setstr(SyntaxError, "'break' outside loop"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2463 | c->c_errors++; |
| 2464 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2465 | com_addbyte(c, BREAK_LOOP); |
| 2466 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2467 | case continue_stmt: |
| 2468 | com_continue_stmt(c, n); |
| 2469 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2470 | case return_stmt: |
| 2471 | com_return_stmt(c, n); |
| 2472 | break; |
| 2473 | case raise_stmt: |
| 2474 | com_raise_stmt(c, n); |
| 2475 | break; |
| 2476 | case import_stmt: |
| 2477 | com_import_stmt(c, n); |
| 2478 | break; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 2479 | case global_stmt: |
| 2480 | com_global_stmt(c, n); |
| 2481 | break; |
Guido van Rossum | 0dfcf75 | 1996-08-12 22:00:53 +0000 | [diff] [blame] | 2482 | #ifdef SUPPORT_OBSOLETE_ACCESS |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 2483 | case access_stmt: |
| 2484 | com_access_stmt(c, n); |
| 2485 | break; |
Guido van Rossum | 0dfcf75 | 1996-08-12 22:00:53 +0000 | [diff] [blame] | 2486 | #endif |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 2487 | case exec_stmt: |
| 2488 | com_exec_stmt(c, n); |
| 2489 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2490 | case if_stmt: |
| 2491 | com_if_stmt(c, n); |
| 2492 | break; |
| 2493 | case while_stmt: |
| 2494 | com_while_stmt(c, n); |
| 2495 | break; |
| 2496 | case for_stmt: |
| 2497 | com_for_stmt(c, n); |
| 2498 | break; |
| 2499 | case try_stmt: |
| 2500 | com_try_stmt(c, n); |
| 2501 | break; |
| 2502 | case suite: |
| 2503 | com_suite(c, n); |
| 2504 | break; |
| 2505 | |
| 2506 | /* Expression nodes */ |
| 2507 | |
| 2508 | case testlist: |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 2509 | com_list(c, n, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2510 | break; |
| 2511 | case test: |
| 2512 | com_test(c, n); |
| 2513 | break; |
| 2514 | case and_test: |
| 2515 | com_and_test(c, n); |
| 2516 | break; |
| 2517 | case not_test: |
| 2518 | com_not_test(c, n); |
| 2519 | break; |
| 2520 | case comparison: |
| 2521 | com_comparison(c, n); |
| 2522 | break; |
| 2523 | case exprlist: |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 2524 | com_list(c, n, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2525 | break; |
| 2526 | case expr: |
| 2527 | com_expr(c, n); |
| 2528 | break; |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2529 | case xor_expr: |
| 2530 | com_xor_expr(c, n); |
| 2531 | break; |
| 2532 | case and_expr: |
| 2533 | com_and_expr(c, n); |
| 2534 | break; |
| 2535 | case shift_expr: |
| 2536 | com_shift_expr(c, n); |
| 2537 | break; |
| 2538 | case arith_expr: |
| 2539 | com_arith_expr(c, n); |
| 2540 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2541 | case term: |
| 2542 | com_term(c, n); |
| 2543 | break; |
| 2544 | case factor: |
| 2545 | com_factor(c, n); |
| 2546 | break; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2547 | case power: |
| 2548 | com_power(c, n); |
| 2549 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2550 | case atom: |
| 2551 | com_atom(c, n); |
| 2552 | break; |
| 2553 | |
| 2554 | default: |
| 2555 | fprintf(stderr, "node type %d\n", TYPE(n)); |
| 2556 | err_setstr(SystemError, "com_node: unexpected node type"); |
| 2557 | c->c_errors++; |
| 2558 | } |
| 2559 | } |
| 2560 | |
| 2561 | static void com_fplist PROTO((struct compiling *, node *)); |
| 2562 | |
| 2563 | static void |
| 2564 | com_fpdef(c, n) |
| 2565 | struct compiling *c; |
| 2566 | node *n; |
| 2567 | { |
| 2568 | REQ(n, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 2569 | if (TYPE(CHILD(n, 0)) == LPAR) |
| 2570 | com_fplist(c, CHILD(n, 1)); |
| 2571 | else |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2572 | com_addoparg(c, STORE_FAST, com_newlocal(c, STR(CHILD(n, 0)))); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2573 | } |
| 2574 | |
| 2575 | static void |
| 2576 | com_fplist(c, n) |
| 2577 | struct compiling *c; |
| 2578 | node *n; |
| 2579 | { |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 2580 | REQ(n, fplist); /* fplist: fpdef (',' fpdef)* [','] */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2581 | if (NCH(n) == 1) { |
| 2582 | com_fpdef(c, CHILD(n, 0)); |
| 2583 | } |
| 2584 | else { |
| 2585 | int i; |
| 2586 | com_addoparg(c, UNPACK_TUPLE, (NCH(n)+1)/2); |
| 2587 | for (i = 0; i < NCH(n); i += 2) |
| 2588 | com_fpdef(c, CHILD(n, i)); |
| 2589 | } |
| 2590 | } |
| 2591 | |
| 2592 | static void |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2593 | com_arglist(c, n) |
| 2594 | struct compiling *c; |
| 2595 | node *n; |
| 2596 | { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2597 | int nch, i; |
| 2598 | int complex = 0; |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2599 | REQ(n, varargslist); |
Guido van Rossum | acbefef | 1992-01-19 16:33:51 +0000 | [diff] [blame] | 2600 | /* varargslist: |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2601 | (fpdef ['=' test] ',')* (fpdef ['=' test] | '*' .....) */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2602 | nch = NCH(n); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2603 | /* Enter all arguments in table of locals */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2604 | for (i = 0; i < nch; i++) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2605 | node *ch = CHILD(n, i); |
| 2606 | node *fp; |
| 2607 | char *name; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2608 | if (TYPE(ch) == STAR || TYPE(ch) == DOUBLESTAR) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 2609 | break; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2610 | REQ(ch, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 2611 | fp = CHILD(ch, 0); |
| 2612 | if (TYPE(fp) == NAME) |
| 2613 | name = STR(fp); |
| 2614 | else { |
| 2615 | name = ""; |
Guido van Rossum | 530956d | 1996-07-21 02:27:43 +0000 | [diff] [blame] | 2616 | complex = 1; |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 2617 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2618 | com_newlocal(c, name); |
| 2619 | c->c_argcount++; |
| 2620 | if (++i >= nch) |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2621 | break; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2622 | ch = CHILD(n, i); |
| 2623 | if (TYPE(ch) == EQUAL) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2624 | i += 2; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2625 | else |
| 2626 | REQ(ch, COMMA); |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2627 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2628 | /* Handle *arguments */ |
| 2629 | if (i < nch) { |
| 2630 | node *ch; |
| 2631 | ch = CHILD(n, i); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2632 | if (TYPE(ch) != DOUBLESTAR) { |
| 2633 | REQ(ch, STAR); |
| 2634 | ch = CHILD(n, i+1); |
| 2635 | if (TYPE(ch) == NAME) { |
| 2636 | c->c_flags |= CO_VARARGS; |
| 2637 | i += 3; |
| 2638 | com_newlocal(c, STR(ch)); |
| 2639 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2640 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2641 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2642 | /* Handle **keywords */ |
| 2643 | if (i < nch) { |
| 2644 | node *ch; |
| 2645 | ch = CHILD(n, i); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2646 | if (TYPE(ch) != DOUBLESTAR) { |
| 2647 | REQ(ch, STAR); |
| 2648 | ch = CHILD(n, i+1); |
| 2649 | REQ(ch, STAR); |
| 2650 | ch = CHILD(n, i+2); |
| 2651 | } |
| 2652 | else |
| 2653 | ch = CHILD(n, i+1); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2654 | REQ(ch, NAME); |
| 2655 | c->c_flags |= CO_VARKEYWORDS; |
| 2656 | com_newlocal(c, STR(ch)); |
| 2657 | } |
| 2658 | if (complex) { |
| 2659 | /* Generate code for complex arguments only after |
| 2660 | having counted the simple arguments */ |
| 2661 | int ilocal = 0; |
| 2662 | for (i = 0; i < nch; i++) { |
| 2663 | node *ch = CHILD(n, i); |
| 2664 | node *fp; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2665 | if (TYPE(ch) == STAR || TYPE(ch) == DOUBLESTAR) |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2666 | break; |
| 2667 | REQ(ch, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 2668 | fp = CHILD(ch, 0); |
| 2669 | if (TYPE(fp) != NAME) { |
| 2670 | com_addoparg(c, LOAD_FAST, ilocal); |
| 2671 | com_fpdef(c, ch); |
| 2672 | } |
| 2673 | ilocal++; |
| 2674 | if (++i >= nch) |
| 2675 | break; |
| 2676 | ch = CHILD(n, i); |
| 2677 | if (TYPE(ch) == EQUAL) |
| 2678 | i += 2; |
| 2679 | else |
| 2680 | REQ(ch, COMMA); |
| 2681 | } |
| 2682 | } |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2683 | } |
| 2684 | |
| 2685 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2686 | com_file_input(c, n) |
| 2687 | struct compiling *c; |
| 2688 | node *n; |
| 2689 | { |
| 2690 | int i; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2691 | object *doc; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2692 | REQ(n, file_input); /* (NEWLINE | stmt)* ENDMARKER */ |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2693 | doc = get_docstring(n); |
| 2694 | if (doc != NULL) { |
| 2695 | int i = com_addconst(c, doc); |
| 2696 | DECREF(doc); |
| 2697 | com_addoparg(c, LOAD_CONST, i); |
| 2698 | com_addopnamestr(c, STORE_NAME, "__doc__"); |
| 2699 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2700 | for (i = 0; i < NCH(n); i++) { |
| 2701 | node *ch = CHILD(n, i); |
| 2702 | if (TYPE(ch) != ENDMARKER && TYPE(ch) != NEWLINE) |
| 2703 | com_node(c, ch); |
| 2704 | } |
| 2705 | } |
| 2706 | |
| 2707 | /* Top-level compile-node interface */ |
| 2708 | |
| 2709 | static void |
| 2710 | compile_funcdef(c, n) |
| 2711 | struct compiling *c; |
| 2712 | node *n; |
| 2713 | { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2714 | object *doc; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2715 | node *ch; |
| 2716 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ':' suite */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 2717 | c->c_name = STR(CHILD(n, 1)); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2718 | doc = get_docstring(CHILD(n, 4)); |
| 2719 | if (doc != NULL) { |
| 2720 | (void) com_addconst(c, doc); |
| 2721 | DECREF(doc); |
| 2722 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2723 | else |
| 2724 | (void) com_addconst(c, None); /* No docstring */ |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2725 | ch = CHILD(n, 2); /* parameters: '(' [varargslist] ')' */ |
| 2726 | ch = CHILD(ch, 1); /* ')' | varargslist */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2727 | if (TYPE(ch) == varargslist) |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 2728 | com_arglist(c, ch); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2729 | c->c_infunction = 1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2730 | com_node(c, CHILD(n, 4)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2731 | c->c_infunction = 0; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2732 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 2733 | com_addbyte(c, RETURN_VALUE); |
| 2734 | } |
| 2735 | |
| 2736 | static void |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2737 | compile_lambdef(c, n) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 2738 | struct compiling *c; |
| 2739 | node *n; |
| 2740 | { |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2741 | node *ch; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2742 | REQ(n, lambdef); /* lambdef: 'lambda' [varargslist] ':' test */ |
Guido van Rossum | 363ac7d | 1994-11-10 22:40:34 +0000 | [diff] [blame] | 2743 | c->c_name = "<lambda>"; |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2744 | |
| 2745 | ch = CHILD(n, 1); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2746 | (void) com_addconst(c, None); /* No docstring */ |
| 2747 | if (TYPE(ch) == varargslist) { |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2748 | com_arglist(c, ch); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2749 | ch = CHILD(n, 3); |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2750 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2751 | else |
| 2752 | ch = CHILD(n, 2); |
| 2753 | com_node(c, ch); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 2754 | com_addbyte(c, RETURN_VALUE); |
| 2755 | } |
| 2756 | |
| 2757 | static void |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2758 | compile_classdef(c, n) |
| 2759 | struct compiling *c; |
| 2760 | node *n; |
| 2761 | { |
| 2762 | node *ch; |
| 2763 | object *doc; |
| 2764 | REQ(n, classdef); |
| 2765 | /* classdef: 'class' NAME ['(' testlist ')'] ':' suite */ |
| 2766 | c->c_name = STR(CHILD(n, 1)); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 2767 | #ifdef PRIVATE_NAME_MANGLING |
| 2768 | c->c_private = c->c_name; |
| 2769 | #endif |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2770 | ch = CHILD(n, NCH(n)-1); /* The suite */ |
| 2771 | doc = get_docstring(ch); |
| 2772 | if (doc != NULL) { |
| 2773 | int i = com_addconst(c, doc); |
| 2774 | DECREF(doc); |
| 2775 | com_addoparg(c, LOAD_CONST, i); |
| 2776 | com_addopnamestr(c, STORE_NAME, "__doc__"); |
| 2777 | } |
| 2778 | else |
| 2779 | (void) com_addconst(c, None); |
| 2780 | com_node(c, ch); |
| 2781 | com_addbyte(c, LOAD_LOCALS); |
| 2782 | com_addbyte(c, RETURN_VALUE); |
| 2783 | } |
| 2784 | |
| 2785 | static void |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2786 | compile_node(c, n) |
| 2787 | struct compiling *c; |
| 2788 | node *n; |
| 2789 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2790 | com_addoparg(c, SET_LINENO, n->n_lineno); |
| 2791 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2792 | switch (TYPE(n)) { |
| 2793 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 2794 | case single_input: /* One interactive command */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2795 | /* NEWLINE | simple_stmt | compound_stmt NEWLINE */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2796 | c->c_interactive++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2797 | n = CHILD(n, 0); |
| 2798 | if (TYPE(n) != NEWLINE) |
| 2799 | com_node(c, n); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2800 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 2801 | com_addbyte(c, RETURN_VALUE); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2802 | c->c_interactive--; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2803 | break; |
| 2804 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 2805 | case file_input: /* A whole file, or built-in function exec() */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2806 | com_file_input(c, n); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2807 | com_addoparg(c, LOAD_CONST, com_addconst(c, None)); |
| 2808 | com_addbyte(c, RETURN_VALUE); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2809 | break; |
| 2810 | |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2811 | case eval_input: /* Built-in function input() */ |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 2812 | com_node(c, CHILD(n, 0)); |
| 2813 | com_addbyte(c, RETURN_VALUE); |
| 2814 | break; |
| 2815 | |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2816 | case lambdef: /* anonymous function definition */ |
| 2817 | compile_lambdef(c, n); |
| 2818 | break; |
| 2819 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 2820 | case funcdef: /* A function definition */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2821 | compile_funcdef(c, n); |
| 2822 | break; |
| 2823 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 2824 | case classdef: /* A class definition */ |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 2825 | compile_classdef(c, n); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2826 | break; |
| 2827 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2828 | default: |
| 2829 | fprintf(stderr, "node type %d\n", TYPE(n)); |
| 2830 | err_setstr(SystemError, "compile_node: unexpected node type"); |
| 2831 | c->c_errors++; |
| 2832 | } |
| 2833 | } |
| 2834 | |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2835 | /* Optimization for local variables in functions (and *only* functions). |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2836 | |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2837 | This replaces all LOAD_NAME, STORE_NAME and DELETE_NAME |
| 2838 | instructions that refer to local variables with LOAD_FAST etc. |
| 2839 | The latter instructions are much faster because they don't need to |
| 2840 | look up the variable name in a dictionary. |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2841 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2842 | To find all local variables, we check all STORE_NAME, IMPORT_FROM |
| 2843 | and DELETE_NAME instructions. This yields all local variables, |
| 2844 | function definitions, class definitions and import statements. |
| 2845 | Argument names have already been entered into the list by the |
| 2846 | special processing for the argument list. |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2847 | |
| 2848 | All remaining LOAD_NAME instructions must refer to non-local (global |
| 2849 | or builtin) variables, so are replaced by LOAD_GLOBAL. |
| 2850 | |
| 2851 | There are two problems: 'from foo import *' and 'exec' may introduce |
| 2852 | local variables that we can't know while compiling. If this is the |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2853 | case, we can still optimize bona fide locals (since those |
| 2854 | statements will be surrounded by fast_2_locals() and |
| 2855 | locals_2_fast()), but we can't change LOAD_NAME to LOAD_GLOBAL. |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2856 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2857 | NB: this modifies the string object c->c_code! */ |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2858 | |
| 2859 | static void |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2860 | optimize(c) |
| 2861 | struct compiling *c; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2862 | { |
Guido van Rossum | 0a697f6 | 1991-04-16 08:39:12 +0000 | [diff] [blame] | 2863 | unsigned char *next_instr, *cur_instr; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2864 | int opcode; |
| 2865 | int oparg; |
| 2866 | object *name; |
Guido van Rossum | 1ae940a | 1995-01-02 19:04:15 +0000 | [diff] [blame] | 2867 | object *error_type, *error_value, *error_traceback; |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2868 | |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2869 | #define NEXTOP() (*next_instr++) |
| 2870 | #define NEXTARG() (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2]) |
| 2871 | #define GETITEM(v, i) (getlistitem((v), (i))) |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2872 | #define GETNAMEOBJ(i) (GETITEM(c->c_names, (i))) |
| 2873 | |
Guido van Rossum | 1ae940a | 1995-01-02 19:04:15 +0000 | [diff] [blame] | 2874 | err_fetch(&error_type, &error_value, &error_traceback); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2875 | |
| 2876 | c->c_flags |= CO_OPTIMIZED; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2877 | |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2878 | next_instr = (unsigned char *) getstringvalue(c->c_code); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2879 | for (;;) { |
| 2880 | opcode = NEXTOP(); |
| 2881 | if (opcode == STOP_CODE) |
| 2882 | break; |
| 2883 | if (HAS_ARG(opcode)) |
| 2884 | oparg = NEXTARG(); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2885 | switch (opcode) { |
| 2886 | case STORE_NAME: |
| 2887 | case DELETE_NAME: |
| 2888 | case IMPORT_FROM: |
| 2889 | com_addlocal_o(c, GETNAMEOBJ(oparg)); |
| 2890 | break; |
| 2891 | case EXEC_STMT: |
| 2892 | c->c_flags &= ~CO_OPTIMIZED; |
| 2893 | break; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2894 | } |
| 2895 | } |
| 2896 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2897 | if (dictlookup(c->c_locals, "*") != NULL) |
| 2898 | c->c_flags &= ~CO_OPTIMIZED; |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2899 | |
| 2900 | next_instr = (unsigned char *) getstringvalue(c->c_code); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2901 | for (;;) { |
| 2902 | cur_instr = next_instr; |
| 2903 | opcode = NEXTOP(); |
| 2904 | if (opcode == STOP_CODE) |
| 2905 | break; |
| 2906 | if (HAS_ARG(opcode)) |
| 2907 | oparg = NEXTARG(); |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2908 | if (opcode == LOAD_NAME || |
| 2909 | opcode == STORE_NAME || |
| 2910 | opcode == DELETE_NAME) { |
| 2911 | object *v; |
| 2912 | int i; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2913 | name = GETNAMEOBJ(oparg); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2914 | v = dict2lookup(c->c_locals, name); |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2915 | if (v == NULL) { |
Guido van Rossum | 8316325 | 1991-08-16 08:58:43 +0000 | [diff] [blame] | 2916 | err_clear(); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2917 | if (opcode == LOAD_NAME && |
| 2918 | (c->c_flags&CO_OPTIMIZED)) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2919 | cur_instr[0] = LOAD_GLOBAL; |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2920 | continue; |
Guido van Rossum | 8316325 | 1991-08-16 08:58:43 +0000 | [diff] [blame] | 2921 | } |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2922 | i = getintvalue(v); |
| 2923 | switch (opcode) { |
| 2924 | case LOAD_NAME: cur_instr[0] = LOAD_FAST; break; |
| 2925 | case STORE_NAME: cur_instr[0] = STORE_FAST; break; |
| 2926 | case DELETE_NAME: cur_instr[0] = DELETE_FAST; break; |
| 2927 | } |
| 2928 | cur_instr[1] = i & 0xff; |
| 2929 | cur_instr[2] = (i>>8) & 0xff; |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2930 | } |
| 2931 | } |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2932 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2933 | if (c->c_errors == 0) |
| 2934 | err_restore(error_type, error_value, error_traceback); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 2935 | } |
| 2936 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2937 | codeobject * |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2938 | compile(n, filename) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2939 | node *n; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2940 | char *filename; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2941 | { |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 2942 | return jcompile(n, filename, NULL); |
| 2943 | } |
| 2944 | |
| 2945 | static codeobject * |
| 2946 | icompile(n, base) |
| 2947 | node *n; |
| 2948 | struct compiling *base; |
| 2949 | { |
| 2950 | return jcompile(n, base->c_filename, base); |
| 2951 | } |
| 2952 | |
| 2953 | static codeobject * |
| 2954 | jcompile(n, filename, base) |
| 2955 | node *n; |
| 2956 | char *filename; |
| 2957 | struct compiling *base; |
| 2958 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2959 | struct compiling sc; |
| 2960 | codeobject *co; |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 2961 | if (!com_init(&sc, filename)) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2962 | return NULL; |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 2963 | #ifdef PRIVATE_NAME_MANGLING |
| 2964 | if (base) |
| 2965 | sc.c_private = base->c_private; |
| 2966 | else |
| 2967 | sc.c_private = NULL; |
| 2968 | #endif |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2969 | compile_node(&sc, n); |
| 2970 | com_done(&sc); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2971 | if ((TYPE(n) == funcdef || TYPE(n) == lambdef) && sc.c_errors == 0) { |
Guido van Rossum | 8b17d6b | 1993-03-30 13:18:41 +0000 | [diff] [blame] | 2972 | optimize(&sc); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2973 | sc.c_flags |= CO_NEWLOCALS; |
| 2974 | } |
| 2975 | else if (TYPE(n) == classdef) |
| 2976 | sc.c_flags |= CO_NEWLOCALS; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 2977 | co = NULL; |
| 2978 | if (sc.c_errors == 0) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2979 | object *consts, *names, *varnames, *filename, *name; |
| 2980 | consts = listtuple(sc.c_consts); |
| 2981 | names = listtuple(sc.c_names); |
| 2982 | varnames = listtuple(sc.c_varnames); |
| 2983 | filename = newstringobject(sc.c_filename); |
| 2984 | name = newstringobject(sc.c_name); |
| 2985 | if (!err_occurred()) |
| 2986 | co = newcodeobject(sc.c_argcount, |
| 2987 | sc.c_nlocals, |
| 2988 | sc.c_flags, |
| 2989 | sc.c_code, |
| 2990 | consts, |
| 2991 | names, |
| 2992 | varnames, |
| 2993 | filename, |
| 2994 | name); |
| 2995 | XDECREF(consts); |
| 2996 | XDECREF(names); |
| 2997 | XDECREF(varnames); |
| 2998 | XDECREF(filename); |
| 2999 | XDECREF(name); |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 3000 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3001 | com_free(&sc); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3002 | return co; |
| 3003 | } |