Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2 | /* Parser-tokenizer link implementation */ |
| 3 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 4 | #include "pgenheaders.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 5 | #include "tokenizer.h" |
| 6 | #include "node.h" |
| 7 | #include "grammar.h" |
| 8 | #include "parser.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 9 | #include "parsetok.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 10 | #include "errcode.h" |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 11 | #include "graminit.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 12 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 13 | |
| 14 | /* Forward */ |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 15 | static node *parsetok(struct tok_state *, grammar *, int, perrdetail *, int *); |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 16 | static int initerr(perrdetail *err_ret, PyObject * filename); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 17 | |
| 18 | /* Parse input coming from a string. Return error code, print some errors. */ |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 19 | node * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 20 | PyParser_ParseString(const char *s, grammar *g, int start, perrdetail *err_ret) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 21 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 22 | return PyParser_ParseStringFlagsFilename(s, NULL, g, start, err_ret, 0); |
Tim Peters | fe2127d | 2001-07-16 05:37:24 +0000 | [diff] [blame] | 23 | } |
| 24 | |
| 25 | node * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 26 | PyParser_ParseStringFlags(const char *s, grammar *g, int start, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 27 | perrdetail *err_ret, int flags) |
Tim Peters | fe2127d | 2001-07-16 05:37:24 +0000 | [diff] [blame] | 28 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 29 | return PyParser_ParseStringFlagsFilename(s, NULL, |
| 30 | g, start, err_ret, flags); |
Thomas Heller | 6b17abf | 2002-07-09 09:23:27 +0000 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | node * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 34 | PyParser_ParseStringFlagsFilename(const char *s, const char *filename, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 35 | grammar *g, int start, |
| 36 | perrdetail *err_ret, int flags) |
Thomas Heller | 6b17abf | 2002-07-09 09:23:27 +0000 | [diff] [blame] | 37 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 38 | int iflags = flags; |
| 39 | return PyParser_ParseStringFlagsFilenameEx(s, filename, g, start, |
| 40 | err_ret, &iflags); |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | node * |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 44 | PyParser_ParseStringObject(const char *s, PyObject *filename, |
| 45 | grammar *g, int start, |
| 46 | perrdetail *err_ret, int *flags) |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 47 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 48 | struct tok_state *tok; |
| 49 | int exec_input = start == file_input; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 50 | |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 51 | if (initerr(err_ret, filename) < 0) |
| 52 | return NULL; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 53 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 54 | if (*flags & PyPARSE_IGNORE_COOKIE) |
| 55 | tok = PyTokenizer_FromUTF8(s, exec_input); |
| 56 | else |
| 57 | tok = PyTokenizer_FromString(s, exec_input); |
| 58 | if (tok == NULL) { |
| 59 | err_ret->error = PyErr_Occurred() ? E_DECODE : E_NOMEM; |
| 60 | return NULL; |
| 61 | } |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 62 | |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 63 | #ifndef PGEN |
| 64 | Py_INCREF(err_ret->filename); |
| 65 | tok->filename = err_ret->filename; |
| 66 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 67 | return parsetok(tok, g, start, err_ret, flags); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 68 | } |
| 69 | |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 70 | node * |
| 71 | PyParser_ParseStringFlagsFilenameEx(const char *s, const char *filename_str, |
| 72 | grammar *g, int start, |
| 73 | perrdetail *err_ret, int *flags) |
| 74 | { |
| 75 | node *n; |
| 76 | PyObject *filename = NULL; |
| 77 | #ifndef PGEN |
| 78 | if (filename_str != NULL) { |
| 79 | filename = PyUnicode_DecodeFSDefault(filename_str); |
| 80 | if (filename == NULL) { |
| 81 | err_ret->error = E_ERROR; |
| 82 | return NULL; |
| 83 | } |
| 84 | } |
| 85 | #endif |
| 86 | n = PyParser_ParseStringObject(s, filename, g, start, err_ret, flags); |
| 87 | #ifndef PGEN |
| 88 | Py_XDECREF(filename); |
| 89 | #endif |
| 90 | return n; |
| 91 | } |
| 92 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 93 | /* Parse input coming from a file. Return error code, print some errors. */ |
| 94 | |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 95 | node * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 96 | PyParser_ParseFile(FILE *fp, const char *filename, grammar *g, int start, |
Serhiy Storchaka | c679227 | 2013-10-19 21:03:34 +0300 | [diff] [blame] | 97 | const char *ps1, const char *ps2, |
| 98 | perrdetail *err_ret) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 99 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 100 | return PyParser_ParseFileFlags(fp, filename, NULL, |
| 101 | g, start, ps1, ps2, err_ret, 0); |
Tim Peters | fe2127d | 2001-07-16 05:37:24 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | node * |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 105 | PyParser_ParseFileFlags(FILE *fp, const char *filename, const char *enc, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 106 | grammar *g, int start, |
Serhiy Storchaka | c679227 | 2013-10-19 21:03:34 +0300 | [diff] [blame] | 107 | const char *ps1, const char *ps2, |
| 108 | perrdetail *err_ret, int flags) |
Tim Peters | fe2127d | 2001-07-16 05:37:24 +0000 | [diff] [blame] | 109 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 110 | int iflags = flags; |
| 111 | return PyParser_ParseFileFlagsEx(fp, filename, enc, g, start, ps1, |
| 112 | ps2, err_ret, &iflags); |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | node * |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 116 | PyParser_ParseFileObject(FILE *fp, PyObject *filename, |
| 117 | const char *enc, grammar *g, int start, |
Serhiy Storchaka | c679227 | 2013-10-19 21:03:34 +0300 | [diff] [blame] | 118 | const char *ps1, const char *ps2, |
| 119 | perrdetail *err_ret, int *flags) |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 120 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 121 | struct tok_state *tok; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 122 | |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 123 | if (initerr(err_ret, filename) < 0) |
| 124 | return NULL; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 125 | |
Serhiy Storchaka | c679227 | 2013-10-19 21:03:34 +0300 | [diff] [blame] | 126 | if ((tok = PyTokenizer_FromFile(fp, enc, ps1, ps2)) == NULL) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 127 | err_ret->error = E_NOMEM; |
| 128 | return NULL; |
| 129 | } |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 130 | #ifndef PGEN |
| 131 | Py_INCREF(err_ret->filename); |
| 132 | tok->filename = err_ret->filename; |
| 133 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 134 | return parsetok(tok, g, start, err_ret, flags); |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 135 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 136 | |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 137 | node * |
| 138 | PyParser_ParseFileFlagsEx(FILE *fp, const char *filename, |
| 139 | const char *enc, grammar *g, int start, |
Serhiy Storchaka | c679227 | 2013-10-19 21:03:34 +0300 | [diff] [blame] | 140 | const char *ps1, const char *ps2, |
| 141 | perrdetail *err_ret, int *flags) |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 142 | { |
| 143 | node *n; |
| 144 | PyObject *fileobj = NULL; |
| 145 | #ifndef PGEN |
| 146 | if (filename != NULL) { |
| 147 | fileobj = PyUnicode_DecodeFSDefault(filename); |
| 148 | if (fileobj == NULL) { |
| 149 | err_ret->error = E_ERROR; |
| 150 | return NULL; |
| 151 | } |
| 152 | } |
| 153 | #endif |
| 154 | n = PyParser_ParseFileObject(fp, fileobj, enc, g, |
| 155 | start, ps1, ps2, err_ret, flags); |
| 156 | #ifndef PGEN |
| 157 | Py_XDECREF(fileobj); |
| 158 | #endif |
| 159 | return n; |
| 160 | } |
| 161 | |
Neal Norwitz | e4993c7 | 2006-03-16 06:01:25 +0000 | [diff] [blame] | 162 | #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD |
Brett Cannon | e3944a5 | 2009-04-01 05:08:41 +0000 | [diff] [blame] | 163 | #if 0 |
Serhiy Storchaka | 2d06e84 | 2015-12-25 19:53:18 +0200 | [diff] [blame] | 164 | static const char with_msg[] = |
Thomas Wouters | 34aa7ba | 2006-02-28 19:02:24 +0000 | [diff] [blame] | 165 | "%s:%d: Warning: 'with' will become a reserved keyword in Python 2.6\n"; |
| 166 | |
Serhiy Storchaka | 2d06e84 | 2015-12-25 19:53:18 +0200 | [diff] [blame] | 167 | static const char as_msg[] = |
Thomas Wouters | 34aa7ba | 2006-02-28 19:02:24 +0000 | [diff] [blame] | 168 | "%s:%d: Warning: 'as' will become a reserved keyword in Python 2.6\n"; |
| 169 | |
| 170 | static void |
| 171 | warn(const char *msg, const char *filename, int lineno) |
| 172 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 173 | if (filename == NULL) |
| 174 | filename = "<string>"; |
| 175 | PySys_WriteStderr(msg, filename, lineno); |
Thomas Wouters | 34aa7ba | 2006-02-28 19:02:24 +0000 | [diff] [blame] | 176 | } |
Neal Norwitz | fc85c92 | 2006-03-17 05:44:46 +0000 | [diff] [blame] | 177 | #endif |
Brett Cannon | e3944a5 | 2009-04-01 05:08:41 +0000 | [diff] [blame] | 178 | #endif |
Guido van Rossum | da62ecc | 2001-07-17 16:53:11 +0000 | [diff] [blame] | 179 | |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 180 | /* Parse input coming from the given tokenizer structure. |
| 181 | Return error code. */ |
| 182 | |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 183 | static node * |
Tim Peters | fe2127d | 2001-07-16 05:37:24 +0000 | [diff] [blame] | 184 | parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 185 | int *flags) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 186 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 187 | parser_state *ps; |
| 188 | node *n; |
Brett Cannon | b94767f | 2011-02-22 20:15:44 +0000 | [diff] [blame] | 189 | int started = 0; |
Ammar Askar | 025eb98 | 2018-09-24 17:12:49 -0400 | [diff] [blame^] | 190 | int col_offset; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 191 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 192 | if ((ps = PyParser_New(g, start)) == NULL) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 193 | err_ret->error = E_NOMEM; |
| 194 | PyTokenizer_Free(tok); |
| 195 | return NULL; |
| 196 | } |
Thomas Wouters | 34aa7ba | 2006-02-28 19:02:24 +0000 | [diff] [blame] | 197 | #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 198 | if (*flags & PyPARSE_BARRY_AS_BDFL) |
| 199 | ps->p_flags |= CO_FUTURE_BARRY_AS_BDFL; |
Neil Schemenauer | c24ea08 | 2002-03-22 23:53:36 +0000 | [diff] [blame] | 200 | #endif |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 201 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 202 | for (;;) { |
| 203 | char *a, *b; |
| 204 | int type; |
| 205 | size_t len; |
| 206 | char *str; |
Ammar Askar | 025eb98 | 2018-09-24 17:12:49 -0400 | [diff] [blame^] | 207 | col_offset = -1; |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 208 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 209 | type = PyTokenizer_Get(tok, &a, &b); |
| 210 | if (type == ERRORTOKEN) { |
| 211 | err_ret->error = tok->done; |
| 212 | break; |
| 213 | } |
| 214 | if (type == ENDMARKER && started) { |
| 215 | type = NEWLINE; /* Add an extra newline */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 216 | started = 0; |
| 217 | /* Add the right number of dedent tokens, |
| 218 | except if a certain flag is given -- |
| 219 | codeop.py uses this. */ |
| 220 | if (tok->indent && |
| 221 | !(*flags & PyPARSE_DONT_IMPLY_DEDENT)) |
| 222 | { |
| 223 | tok->pendin = -tok->indent; |
| 224 | tok->indent = 0; |
| 225 | } |
| 226 | } |
| 227 | else |
| 228 | started = 1; |
Zackery Spytz | 7c4ab2a | 2018-08-15 00:27:26 -0600 | [diff] [blame] | 229 | len = (a != NULL && b != NULL) ? b - a : 0; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 230 | str = (char *) PyObject_MALLOC(len + 1); |
| 231 | if (str == NULL) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 232 | err_ret->error = E_NOMEM; |
| 233 | break; |
| 234 | } |
| 235 | if (len > 0) |
| 236 | strncpy(str, a, len); |
| 237 | str[len] = '\0'; |
Guido van Rossum | da62ecc | 2001-07-17 16:53:11 +0000 | [diff] [blame] | 238 | |
Thomas Wouters | 34aa7ba | 2006-02-28 19:02:24 +0000 | [diff] [blame] | 239 | #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 240 | if (type == NOTEQUAL) { |
| 241 | if (!(ps->p_flags & CO_FUTURE_BARRY_AS_BDFL) && |
| 242 | strcmp(str, "!=")) { |
Antoine Pitrou | 9ec2593 | 2011-11-13 01:01:23 +0100 | [diff] [blame] | 243 | PyObject_FREE(str); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 244 | err_ret->error = E_SYNTAX; |
| 245 | break; |
| 246 | } |
| 247 | else if ((ps->p_flags & CO_FUTURE_BARRY_AS_BDFL) && |
| 248 | strcmp(str, "<>")) { |
Antoine Pitrou | 9ec2593 | 2011-11-13 01:01:23 +0100 | [diff] [blame] | 249 | PyObject_FREE(str); |
Serhiy Storchaka | aba24ff | 2018-07-23 23:41:11 +0300 | [diff] [blame] | 250 | err_ret->expected = NOTEQUAL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 251 | err_ret->error = E_SYNTAX; |
| 252 | break; |
| 253 | } |
| 254 | } |
Neil Schemenauer | c24ea08 | 2002-03-22 23:53:36 +0000 | [diff] [blame] | 255 | #endif |
Zackery Spytz | 3e26e42 | 2018-08-20 21:11:40 -0600 | [diff] [blame] | 256 | if (a != NULL && a >= tok->line_start) { |
Victor Stinner | cad876d | 2013-11-18 01:09:51 +0100 | [diff] [blame] | 257 | col_offset = Py_SAFE_DOWNCAST(a - tok->line_start, |
Benjamin Peterson | ca47063 | 2016-09-06 13:47:26 -0700 | [diff] [blame] | 258 | intptr_t, int); |
Zackery Spytz | 3e26e42 | 2018-08-20 21:11:40 -0600 | [diff] [blame] | 259 | } |
| 260 | else { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 261 | col_offset = -1; |
Zackery Spytz | 3e26e42 | 2018-08-20 21:11:40 -0600 | [diff] [blame] | 262 | } |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 263 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 264 | if ((err_ret->error = |
| 265 | PyParser_AddToken(ps, (int)type, str, |
| 266 | tok->lineno, col_offset, |
| 267 | &(err_ret->expected))) != E_OK) { |
| 268 | if (err_ret->error != E_DONE) { |
| 269 | PyObject_FREE(str); |
| 270 | err_ret->token = type; |
| 271 | } |
| 272 | break; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if (err_ret->error == E_DONE) { |
| 277 | n = ps->p_tree; |
| 278 | ps->p_tree = NULL; |
Meador Inge | fa21bf0 | 2012-01-19 01:08:41 -0600 | [diff] [blame] | 279 | |
Benjamin Peterson | 79c1f96 | 2012-01-19 08:48:11 -0500 | [diff] [blame] | 280 | #ifndef PGEN |
Meador Inge | fa21bf0 | 2012-01-19 01:08:41 -0600 | [diff] [blame] | 281 | /* Check that the source for a single input statement really |
| 282 | is a single statement by looking at what is left in the |
| 283 | buffer after parsing. Trailing whitespace and comments |
| 284 | are OK. */ |
| 285 | if (start == single_input) { |
| 286 | char *cur = tok->cur; |
| 287 | char c = *tok->cur; |
| 288 | |
Benjamin Peterson | cff9237 | 2012-01-19 17:46:13 -0500 | [diff] [blame] | 289 | for (;;) { |
| 290 | while (c == ' ' || c == '\t' || c == '\n' || c == '\014') |
| 291 | c = *++cur; |
Meador Inge | fa21bf0 | 2012-01-19 01:08:41 -0600 | [diff] [blame] | 292 | |
Benjamin Peterson | cff9237 | 2012-01-19 17:46:13 -0500 | [diff] [blame] | 293 | if (!c) |
| 294 | break; |
| 295 | |
| 296 | if (c != '#') { |
| 297 | err_ret->error = E_BADSINGLE; |
| 298 | PyNode_Free(n); |
| 299 | n = NULL; |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | /* Suck up comment. */ |
| 304 | while (c && c != '\n') |
| 305 | c = *++cur; |
Meador Inge | fa21bf0 | 2012-01-19 01:08:41 -0600 | [diff] [blame] | 306 | } |
| 307 | } |
Benjamin Peterson | 79c1f96 | 2012-01-19 08:48:11 -0500 | [diff] [blame] | 308 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 309 | } |
| 310 | else |
| 311 | n = NULL; |
Christian Heimes | b1b3efc | 2008-03-26 23:24:27 +0000 | [diff] [blame] | 312 | |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 313 | #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 314 | *flags = ps->p_flags; |
Christian Heimes | 4d6ec85 | 2008-03-26 22:34:47 +0000 | [diff] [blame] | 315 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 316 | PyParser_Delete(ps); |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 317 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 318 | if (n == NULL) { |
Benjamin Peterson | 758888d | 2011-05-30 11:12:38 -0500 | [diff] [blame] | 319 | if (tok->done == E_EOF) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 320 | err_ret->error = E_EOF; |
| 321 | err_ret->lineno = tok->lineno; |
| 322 | if (tok->buf != NULL) { |
| 323 | size_t len; |
| 324 | assert(tok->cur - tok->buf < INT_MAX); |
Ammar Askar | 025eb98 | 2018-09-24 17:12:49 -0400 | [diff] [blame^] | 325 | /* if we've managed to parse a token, point the offset to its start, |
| 326 | * else use the current reading position of the tokenizer |
| 327 | */ |
| 328 | err_ret->offset = col_offset != -1 ? col_offset + 1 : ((int)(tok->cur - tok->buf)); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 329 | len = tok->inp - tok->buf; |
| 330 | err_ret->text = (char *) PyObject_MALLOC(len + 1); |
| 331 | if (err_ret->text != NULL) { |
| 332 | if (len > 0) |
| 333 | strncpy(err_ret->text, tok->buf, len); |
| 334 | err_ret->text[len] = '\0'; |
| 335 | } |
| 336 | } |
| 337 | } else if (tok->encoding != NULL) { |
| 338 | /* 'nodes->n_str' uses PyObject_*, while 'tok->encoding' was |
| 339 | * allocated using PyMem_ |
| 340 | */ |
| 341 | node* r = PyNode_New(encoding_decl); |
| 342 | if (r) |
| 343 | r->n_str = PyObject_MALLOC(strlen(tok->encoding)+1); |
| 344 | if (!r || !r->n_str) { |
| 345 | err_ret->error = E_NOMEM; |
| 346 | if (r) |
| 347 | PyObject_FREE(r); |
| 348 | n = NULL; |
| 349 | goto done; |
| 350 | } |
| 351 | strcpy(r->n_str, tok->encoding); |
| 352 | PyMem_FREE(tok->encoding); |
| 353 | tok->encoding = NULL; |
| 354 | r->n_nchildren = 1; |
| 355 | r->n_child = n; |
| 356 | n = r; |
| 357 | } |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 358 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 359 | done: |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 360 | PyTokenizer_Free(tok); |
Guido van Rossum | bd0389d | 1994-08-29 12:25:45 +0000 | [diff] [blame] | 361 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 362 | return n; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 363 | } |
Guido van Rossum | 0c156a5 | 2001-10-20 14:27:56 +0000 | [diff] [blame] | 364 | |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 365 | static int |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 366 | initerr(perrdetail *err_ret, PyObject *filename) |
Guido van Rossum | 0c156a5 | 2001-10-20 14:27:56 +0000 | [diff] [blame] | 367 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 368 | err_ret->error = E_OK; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 369 | err_ret->lineno = 0; |
| 370 | err_ret->offset = 0; |
| 371 | err_ret->text = NULL; |
| 372 | err_ret->token = -1; |
| 373 | err_ret->expected = -1; |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 374 | #ifndef PGEN |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 375 | if (filename) { |
| 376 | Py_INCREF(filename); |
| 377 | err_ret->filename = filename; |
| 378 | } |
| 379 | else { |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 380 | err_ret->filename = PyUnicode_FromString("<string>"); |
Victor Stinner | 14e461d | 2013-08-26 22:28:21 +0200 | [diff] [blame] | 381 | if (err_ret->filename == NULL) { |
| 382 | err_ret->error = E_ERROR; |
| 383 | return -1; |
| 384 | } |
Victor Stinner | 7f2fee3 | 2011-04-05 00:39:01 +0200 | [diff] [blame] | 385 | } |
| 386 | #endif |
| 387 | return 0; |
Guido van Rossum | 0c156a5 | 2001-10-20 14:27:56 +0000 | [diff] [blame] | 388 | } |