Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1 | |
| 2 | /* struct module -- pack values into and (out of) strings */ |
| 3 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 4 | /* New version supporting byte order, alignment and size options, |
| 5 | character strings, and unsigned numbers */ |
| 6 | |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 7 | static char struct__doc__[] = "\ |
| 8 | Functions to convert between Python values and C structs.\n\ |
| 9 | Python strings are used to hold the data representing the C struct\n\ |
| 10 | and also as format strings to describe the layout of data in the C struct.\n\ |
| 11 | \n\ |
Tim Peters | be80085 | 2001-06-11 16:45:33 +0000 | [diff] [blame^] | 12 | The optional first format char indicates byte order, size and alignment:\n\ |
| 13 | @: native order, size & alignment (default)\n\ |
| 14 | =: native order, std. size & alignment\n\ |
| 15 | <: little-endian, std. size & alignment\n\ |
| 16 | >: big-endian, std. size & alignment\n\ |
| 17 | !: same as >\n\ |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 18 | \n\ |
| 19 | The remaining chars indicate types of args and must match exactly;\n\ |
| 20 | these can be preceded by a decimal repeat count:\n\ |
| 21 | x: pad byte (no data); c:char; b:signed byte; B:unsigned byte;\n\ |
| 22 | h:short; H:unsigned short; i:int; I:unsigned int;\n\ |
| 23 | l:long; L:unsigned long; f:float; d:double.\n\ |
| 24 | Special cases (preceding decimal count indicates length):\n\ |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 25 | s:string (array of char); p: pascal string (with count byte).\n\ |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 26 | Special case (only available in native format):\n\ |
| 27 | P:an integer type that is wide enough to hold a pointer.\n\ |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 28 | Special case (not in native mode unless 'long long' in platform C):\n\ |
| 29 | q:long long; Q:unsigned long long\n\ |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 30 | Whitespace between formats is ignored.\n\ |
| 31 | \n\ |
| 32 | The variable struct.error is an exception raised on errors."; |
| 33 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 34 | #include "Python.h" |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 35 | |
Guido van Rossum | e20aef5 | 1997-08-26 20:39:54 +0000 | [diff] [blame] | 36 | #include <ctype.h> |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 37 | |
| 38 | |
| 39 | /* Exception */ |
| 40 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 41 | static PyObject *StructError; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 42 | |
| 43 | |
| 44 | /* Define various structs to figure out the alignments of types */ |
| 45 | |
Jack Jansen | 971e1df | 1995-02-02 14:29:10 +0000 | [diff] [blame] | 46 | #ifdef __MWERKS__ |
| 47 | /* |
| 48 | ** XXXX We have a problem here. There are no unique alignment rules |
| 49 | ** on the PowerPC mac. |
| 50 | */ |
| 51 | #ifdef __powerc |
| 52 | #pragma options align=mac68k |
| 53 | #endif |
| 54 | #endif /* __MWERKS__ */ |
| 55 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 56 | typedef struct { char c; short x; } s_short; |
| 57 | typedef struct { char c; int x; } s_int; |
| 58 | typedef struct { char c; long x; } s_long; |
| 59 | typedef struct { char c; float x; } s_float; |
| 60 | typedef struct { char c; double x; } s_double; |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 61 | typedef struct { char c; void *x; } s_void_p; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 62 | |
| 63 | #define SHORT_ALIGN (sizeof(s_short) - sizeof(short)) |
| 64 | #define INT_ALIGN (sizeof(s_int) - sizeof(int)) |
| 65 | #define LONG_ALIGN (sizeof(s_long) - sizeof(long)) |
| 66 | #define FLOAT_ALIGN (sizeof(s_float) - sizeof(float)) |
| 67 | #define DOUBLE_ALIGN (sizeof(s_double) - sizeof(double)) |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 68 | #define VOID_P_ALIGN (sizeof(s_void_p) - sizeof(void *)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 69 | |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 70 | /* We can't support q and Q in native mode unless the compiler does; |
| 71 | in std mode, they're 8 bytes on all platforms. */ |
| 72 | #ifdef HAVE_LONG_LONG |
| 73 | typedef struct { char c; LONG_LONG x; } s_long_long; |
| 74 | #define LONG_LONG_ALIGN (sizeof(s_long_long) - sizeof(LONG_LONG)) |
| 75 | |
| 76 | #else |
| 77 | static char qQ_error_msg[] = |
| 78 | "q and Q unavailable in native mode on this platform; use a standard mode.\0"; |
| 79 | |
| 80 | #endif |
| 81 | |
Martin v. Löwis | 2af72d5 | 2000-09-15 08:10:33 +0000 | [diff] [blame] | 82 | #define STRINGIFY(x) #x |
| 83 | |
Jack Jansen | 971e1df | 1995-02-02 14:29:10 +0000 | [diff] [blame] | 84 | #ifdef __powerc |
| 85 | #pragma options align=reset |
| 86 | #endif |
| 87 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 88 | /* Helper routine to get a Python integer and raise the appropriate error |
| 89 | if it isn't one */ |
| 90 | |
| 91 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 92 | get_long(PyObject *v, long *p) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 93 | { |
| 94 | long x = PyInt_AsLong(v); |
| 95 | if (x == -1 && PyErr_Occurred()) { |
Fred Drake | d3dbb38 | 1998-05-28 04:35:49 +0000 | [diff] [blame] | 96 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 97 | PyErr_SetString(StructError, |
| 98 | "required argument is not an integer"); |
| 99 | return -1; |
| 100 | } |
| 101 | *p = x; |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 106 | /* Same, but handling unsigned long */ |
| 107 | |
| 108 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 109 | get_ulong(PyObject *v, unsigned long *p) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 110 | { |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 111 | if (PyLong_Check(v)) { |
| 112 | unsigned long x = PyLong_AsUnsignedLong(v); |
| 113 | if (x == (unsigned long)(-1) && PyErr_Occurred()) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 114 | return -1; |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 115 | *p = x; |
| 116 | return 0; |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 117 | } |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 118 | else { |
| 119 | return get_long(v, (long *)p); |
| 120 | } |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 121 | } |
| 122 | |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 123 | #ifdef HAVE_LONG_LONG |
| 124 | |
| 125 | /* Same, but handling native long long. */ |
| 126 | |
| 127 | static int |
| 128 | get_longlong(PyObject *v, LONG_LONG *p) |
| 129 | { |
| 130 | LONG_LONG x; |
| 131 | int v_needs_decref = 0; |
| 132 | |
| 133 | if (PyInt_Check(v)) { |
| 134 | x = (LONG_LONG)PyInt_AS_LONG(v); |
| 135 | *p = x; |
| 136 | return 0; |
| 137 | } |
| 138 | if (!PyLong_Check(v)) { |
| 139 | PyNumberMethods *m = v->ob_type->tp_as_number; |
| 140 | if (m != NULL && m->nb_long != NULL) { |
| 141 | v = m->nb_long(v); |
| 142 | if (v == NULL) |
| 143 | return -1; |
| 144 | v_needs_decref = 1; |
| 145 | } |
| 146 | if (!PyLong_Check(v)) { |
| 147 | PyErr_SetString(StructError, |
| 148 | "cannot convert argument to long"); |
| 149 | if (v_needs_decref) |
| 150 | Py_DECREF(v); |
| 151 | return -1; |
| 152 | } |
| 153 | } |
| 154 | assert(PyLong_Check(v)); |
| 155 | x = PyLong_AsLongLong(v); |
| 156 | if (v_needs_decref) |
| 157 | Py_DECREF(v); |
| 158 | if (x == (LONG_LONG)-1 && PyErr_Occurred()) |
| 159 | return -1; |
| 160 | *p = x; |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /* Same, but handling native unsigned long long. */ |
| 165 | |
| 166 | static int |
| 167 | get_ulonglong(PyObject *v, unsigned LONG_LONG *p) |
| 168 | { |
| 169 | unsigned LONG_LONG x; |
| 170 | int v_needs_decref = 0; |
| 171 | |
| 172 | if (PyInt_Check(v)) { |
| 173 | long i = PyInt_AS_LONG(v); |
| 174 | if (i < 0) { |
| 175 | PyErr_SetString(StructError, "can't convert negative " |
| 176 | "int to unsigned"); |
| 177 | return -1; |
| 178 | } |
| 179 | x = (unsigned LONG_LONG)i; |
| 180 | *p = x; |
| 181 | return 0; |
| 182 | } |
| 183 | if (!PyLong_Check(v)) { |
| 184 | PyNumberMethods *m = v->ob_type->tp_as_number; |
| 185 | if (m != NULL && m->nb_long != NULL) { |
| 186 | v = m->nb_long(v); |
| 187 | if (v == NULL) |
| 188 | return -1; |
| 189 | v_needs_decref = 1; |
| 190 | } |
| 191 | if (!PyLong_Check(v)) { |
| 192 | PyErr_SetString(StructError, |
| 193 | "cannot convert argument to long"); |
| 194 | if (v_needs_decref) |
| 195 | Py_DECREF(v); |
| 196 | return -1; |
| 197 | } |
| 198 | } |
| 199 | assert(PyLong_Check(v)); |
| 200 | x = PyLong_AsUnsignedLongLong(v); |
| 201 | if (v_needs_decref) |
| 202 | Py_DECREF(v); |
| 203 | if (x == (unsigned LONG_LONG)-1 && PyErr_Occurred()) |
| 204 | return -1; |
| 205 | *p = x; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | #endif |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 210 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 211 | /* Floating point helpers */ |
| 212 | |
| 213 | /* These use ANSI/IEEE Standard 754-1985 (Standard for Binary Floating |
| 214 | Point Arithmetic). See the following URL: |
| 215 | http://www.psc.edu/general/software/packages/ieee/ieee.html */ |
| 216 | |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 217 | /* XXX Inf/NaN are not handled quite right (but underflow is!) */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 218 | |
| 219 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 220 | pack_float(double x, /* The number to pack */ |
| 221 | char *p, /* Where to pack the high order byte */ |
| 222 | int incr) /* 1 for big-endian; -1 for little-endian */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 223 | { |
| 224 | int s; |
| 225 | int e; |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 226 | double f; |
| 227 | long fbits; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 228 | |
| 229 | if (x < 0) { |
| 230 | s = 1; |
| 231 | x = -x; |
| 232 | } |
| 233 | else |
| 234 | s = 0; |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 235 | |
| 236 | f = frexp(x, &e); |
| 237 | |
| 238 | /* Normalize f to be in the range [1.0, 2.0) */ |
| 239 | if (0.5 <= f && f < 1.0) { |
| 240 | f *= 2.0; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 241 | e--; |
| 242 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 243 | else if (f == 0.0) { |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 244 | e = 0; |
| 245 | } |
| 246 | else { |
| 247 | PyErr_SetString(PyExc_SystemError, |
| 248 | "frexp() result out of range"); |
| 249 | return -1; |
| 250 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 251 | |
| 252 | if (e >= 128) { |
| 253 | /* XXX 128 itself is reserved for Inf/NaN */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 254 | PyErr_SetString(PyExc_OverflowError, |
| 255 | "float too large to pack with f format"); |
| 256 | return -1; |
| 257 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 258 | else if (e < -126) { |
| 259 | /* Gradual underflow */ |
| 260 | f = ldexp(f, 126 + e); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 261 | e = 0; |
| 262 | } |
Guido van Rossum | 8f3c812 | 1997-11-04 17:12:33 +0000 | [diff] [blame] | 263 | else if (!(e == 0 && f == 0.0)) { |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 264 | e += 127; |
| 265 | f -= 1.0; /* Get rid of leading 1 */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 268 | f *= 8388608.0; /* 2**23 */ |
| 269 | fbits = (long) floor(f + 0.5); /* Round */ |
| 270 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 271 | /* First byte */ |
| 272 | *p = (s<<7) | (e>>1); |
| 273 | p += incr; |
| 274 | |
| 275 | /* Second byte */ |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 276 | *p = (char) (((e&1)<<7) | (fbits>>16)); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 277 | p += incr; |
| 278 | |
| 279 | /* Third byte */ |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 280 | *p = (fbits>>8) & 0xFF; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 281 | p += incr; |
| 282 | |
| 283 | /* Fourth byte */ |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 284 | *p = fbits&0xFF; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 285 | |
| 286 | /* Done */ |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 291 | pack_double(double x, /* The number to pack */ |
| 292 | char *p, /* Where to pack the high order byte */ |
| 293 | int incr) /* 1 for big-endian; -1 for little-endian */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 294 | { |
| 295 | int s; |
| 296 | int e; |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 297 | double f; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 298 | long fhi, flo; |
| 299 | |
| 300 | if (x < 0) { |
| 301 | s = 1; |
| 302 | x = -x; |
| 303 | } |
| 304 | else |
| 305 | s = 0; |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 306 | |
| 307 | f = frexp(x, &e); |
| 308 | |
| 309 | /* Normalize f to be in the range [1.0, 2.0) */ |
| 310 | if (0.5 <= f && f < 1.0) { |
| 311 | f *= 2.0; |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 312 | e--; |
| 313 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 314 | else if (f == 0.0) { |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 315 | e = 0; |
| 316 | } |
| 317 | else { |
| 318 | PyErr_SetString(PyExc_SystemError, |
| 319 | "frexp() result out of range"); |
| 320 | return -1; |
| 321 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 322 | |
| 323 | if (e >= 1024) { |
| 324 | /* XXX 1024 itself is reserved for Inf/NaN */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 325 | PyErr_SetString(PyExc_OverflowError, |
| 326 | "float too large to pack with d format"); |
| 327 | return -1; |
| 328 | } |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 329 | else if (e < -1022) { |
| 330 | /* Gradual underflow */ |
| 331 | f = ldexp(f, 1022 + e); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 332 | e = 0; |
| 333 | } |
Guido van Rossum | 8f3c812 | 1997-11-04 17:12:33 +0000 | [diff] [blame] | 334 | else if (!(e == 0 && f == 0.0)) { |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 335 | e += 1023; |
| 336 | f -= 1.0; /* Get rid of leading 1 */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 337 | } |
| 338 | |
Guido van Rossum | 4ccc531 | 1997-01-02 23:23:20 +0000 | [diff] [blame] | 339 | /* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */ |
| 340 | f *= 268435456.0; /* 2**28 */ |
| 341 | fhi = (long) floor(f); /* Truncate */ |
| 342 | f -= (double)fhi; |
| 343 | f *= 16777216.0; /* 2**24 */ |
| 344 | flo = (long) floor(f + 0.5); /* Round */ |
| 345 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 346 | /* First byte */ |
| 347 | *p = (s<<7) | (e>>4); |
| 348 | p += incr; |
| 349 | |
| 350 | /* Second byte */ |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 351 | *p = (char) (((e&0xF)<<4) | (fhi>>24)); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 352 | p += incr; |
| 353 | |
| 354 | /* Third byte */ |
| 355 | *p = (fhi>>16) & 0xFF; |
| 356 | p += incr; |
| 357 | |
| 358 | /* Fourth byte */ |
| 359 | *p = (fhi>>8) & 0xFF; |
| 360 | p += incr; |
| 361 | |
| 362 | /* Fifth byte */ |
| 363 | *p = fhi & 0xFF; |
| 364 | p += incr; |
| 365 | |
| 366 | /* Sixth byte */ |
| 367 | *p = (flo>>16) & 0xFF; |
| 368 | p += incr; |
| 369 | |
| 370 | /* Seventh byte */ |
| 371 | *p = (flo>>8) & 0xFF; |
| 372 | p += incr; |
| 373 | |
| 374 | /* Eighth byte */ |
| 375 | *p = flo & 0xFF; |
| 376 | p += incr; |
| 377 | |
| 378 | /* Done */ |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 383 | unpack_float(const char *p, /* Where the high order byte is */ |
| 384 | int incr) /* 1 for big-endian; -1 for little-endian */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 385 | { |
| 386 | int s; |
| 387 | int e; |
| 388 | long f; |
| 389 | double x; |
| 390 | |
| 391 | /* First byte */ |
| 392 | s = (*p>>7) & 1; |
| 393 | e = (*p & 0x7F) << 1; |
| 394 | p += incr; |
| 395 | |
| 396 | /* Second byte */ |
| 397 | e |= (*p>>7) & 1; |
| 398 | f = (*p & 0x7F) << 16; |
| 399 | p += incr; |
| 400 | |
| 401 | /* Third byte */ |
| 402 | f |= (*p & 0xFF) << 8; |
| 403 | p += incr; |
| 404 | |
| 405 | /* Fourth byte */ |
| 406 | f |= *p & 0xFF; |
| 407 | |
| 408 | x = (double)f / 8388608.0; |
| 409 | |
| 410 | /* XXX This sadly ignores Inf/NaN issues */ |
Guido van Rossum | 07ef655 | 1997-01-02 22:31:07 +0000 | [diff] [blame] | 411 | if (e == 0) |
| 412 | e = -126; |
| 413 | else { |
| 414 | x += 1.0; |
| 415 | e -= 127; |
| 416 | } |
| 417 | x = ldexp(x, e); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 418 | |
| 419 | if (s) |
| 420 | x = -x; |
| 421 | |
| 422 | return PyFloat_FromDouble(x); |
| 423 | } |
| 424 | |
| 425 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 426 | unpack_double(const char *p, /* Where the high order byte is */ |
| 427 | int incr) /* 1 for big-endian; -1 for little-endian */ |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 428 | { |
| 429 | int s; |
| 430 | int e; |
| 431 | long fhi, flo; |
| 432 | double x; |
| 433 | |
| 434 | /* First byte */ |
| 435 | s = (*p>>7) & 1; |
| 436 | e = (*p & 0x7F) << 4; |
| 437 | p += incr; |
| 438 | |
| 439 | /* Second byte */ |
| 440 | e |= (*p>>4) & 0xF; |
| 441 | fhi = (*p & 0xF) << 24; |
| 442 | p += incr; |
| 443 | |
| 444 | /* Third byte */ |
| 445 | fhi |= (*p & 0xFF) << 16; |
| 446 | p += incr; |
| 447 | |
| 448 | /* Fourth byte */ |
| 449 | fhi |= (*p & 0xFF) << 8; |
| 450 | p += incr; |
| 451 | |
| 452 | /* Fifth byte */ |
| 453 | fhi |= *p & 0xFF; |
| 454 | p += incr; |
| 455 | |
| 456 | /* Sixth byte */ |
| 457 | flo = (*p & 0xFF) << 16; |
| 458 | p += incr; |
| 459 | |
| 460 | /* Seventh byte */ |
| 461 | flo |= (*p & 0xFF) << 8; |
| 462 | p += incr; |
| 463 | |
| 464 | /* Eighth byte */ |
| 465 | flo |= *p & 0xFF; |
| 466 | p += incr; |
| 467 | |
| 468 | x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */ |
| 469 | x /= 268435456.0; /* 2**28 */ |
| 470 | |
| 471 | /* XXX This sadly ignores Inf/NaN */ |
Guido van Rossum | 07ef655 | 1997-01-02 22:31:07 +0000 | [diff] [blame] | 472 | if (e == 0) |
| 473 | e = -1022; |
| 474 | else { |
| 475 | x += 1.0; |
| 476 | e -= 1023; |
| 477 | } |
| 478 | x = ldexp(x, e); |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 479 | |
| 480 | if (s) |
| 481 | x = -x; |
| 482 | |
| 483 | return PyFloat_FromDouble(x); |
| 484 | } |
| 485 | |
| 486 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 487 | /* The translation function for each format character is table driven */ |
| 488 | |
| 489 | typedef struct _formatdef { |
| 490 | char format; |
| 491 | int size; |
| 492 | int alignment; |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 493 | PyObject* (*unpack)(const char *, |
| 494 | const struct _formatdef *); |
| 495 | int (*pack)(char *, PyObject *, |
| 496 | const struct _formatdef *); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 497 | } formatdef; |
| 498 | |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 499 | /* A large number of small routines follow, with names of the form |
| 500 | |
| 501 | [bln][up]_TYPE |
| 502 | |
| 503 | [bln] distiguishes among big-endian, little-endian and native. |
| 504 | [pu] distiguishes between pack (to struct) and unpack (from struct). |
| 505 | TYPE is one of char, byte, ubyte, etc. |
| 506 | */ |
| 507 | |
| 508 | /* Native mode routines. */ |
| 509 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 510 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 511 | nu_char(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 512 | { |
| 513 | return PyString_FromStringAndSize(p, 1); |
| 514 | } |
| 515 | |
| 516 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 517 | nu_byte(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 518 | { |
| 519 | return PyInt_FromLong((long) *(signed char *)p); |
| 520 | } |
| 521 | |
| 522 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 523 | nu_ubyte(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 524 | { |
| 525 | return PyInt_FromLong((long) *(unsigned char *)p); |
| 526 | } |
| 527 | |
| 528 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 529 | nu_short(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 530 | { |
| 531 | return PyInt_FromLong((long) *(short *)p); |
| 532 | } |
| 533 | |
| 534 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 535 | nu_ushort(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 536 | { |
| 537 | return PyInt_FromLong((long) *(unsigned short *)p); |
| 538 | } |
| 539 | |
| 540 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 541 | nu_int(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 542 | { |
| 543 | return PyInt_FromLong((long) *(int *)p); |
| 544 | } |
| 545 | |
| 546 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 547 | nu_uint(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 548 | { |
| 549 | unsigned int x = *(unsigned int *)p; |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 550 | return PyLong_FromUnsignedLong((unsigned long)x); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 554 | nu_long(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 555 | { |
| 556 | return PyInt_FromLong(*(long *)p); |
| 557 | } |
| 558 | |
| 559 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 560 | nu_ulong(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 561 | { |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 562 | return PyLong_FromUnsignedLong(*(unsigned long *)p); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 563 | } |
| 564 | |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 565 | /* Native mode doesn't support q or Q unless the platform C supports |
| 566 | long long (or, on Windows, __int64). */ |
| 567 | |
| 568 | #ifdef HAVE_LONG_LONG |
| 569 | |
| 570 | static PyObject * |
| 571 | nu_longlong(const char *p, const formatdef *f) |
| 572 | { |
| 573 | return PyLong_FromLongLong(*(LONG_LONG *)p); |
| 574 | } |
| 575 | |
| 576 | static PyObject * |
| 577 | nu_ulonglong(const char *p, const formatdef *f) |
| 578 | { |
| 579 | return PyLong_FromUnsignedLongLong(*(unsigned LONG_LONG *)p); |
| 580 | } |
| 581 | |
| 582 | #else |
| 583 | |
| 584 | static PyObject * |
| 585 | nu_qQerror(const char *p, const formatdef *f) |
| 586 | { |
| 587 | PyErr_SetString(StructError, qQ_error_msg); |
| 588 | return NULL; |
| 589 | } |
| 590 | |
| 591 | #endif |
| 592 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 593 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 594 | nu_float(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 595 | { |
| 596 | float x; |
| 597 | memcpy((char *)&x, p, sizeof(float)); |
| 598 | return PyFloat_FromDouble((double)x); |
| 599 | } |
| 600 | |
| 601 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 602 | nu_double(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 603 | { |
| 604 | double x; |
| 605 | memcpy((char *)&x, p, sizeof(double)); |
| 606 | return PyFloat_FromDouble(x); |
| 607 | } |
| 608 | |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 609 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 610 | nu_void_p(const char *p, const formatdef *f) |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 611 | { |
| 612 | return PyLong_FromVoidPtr(*(void **)p); |
| 613 | } |
| 614 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 615 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 616 | np_byte(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 617 | { |
| 618 | long x; |
| 619 | if (get_long(v, &x) < 0) |
| 620 | return -1; |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 621 | if (x < -128 || x > 127){ |
| 622 | PyErr_SetString(StructError, |
| 623 | "byte format requires -128<=number<=127"); |
| 624 | return -1; |
| 625 | } |
| 626 | *p = (char)x; |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static int |
| 631 | np_ubyte(char *p, PyObject *v, const formatdef *f) |
| 632 | { |
| 633 | long x; |
| 634 | if (get_long(v, &x) < 0) |
| 635 | return -1; |
| 636 | if (x < 0 || x > 255){ |
| 637 | PyErr_SetString(StructError, |
| 638 | "ubyte format requires 0<=number<=255"); |
| 639 | return -1; |
| 640 | } |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 641 | *p = (char)x; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 646 | np_char(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 647 | { |
| 648 | if (!PyString_Check(v) || PyString_Size(v) != 1) { |
| 649 | PyErr_SetString(StructError, |
| 650 | "char format require string of length 1"); |
| 651 | return -1; |
| 652 | } |
| 653 | *p = *PyString_AsString(v); |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 658 | np_short(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 659 | { |
| 660 | long x; |
| 661 | if (get_long(v, &x) < 0) |
| 662 | return -1; |
Martin v. Löwis | 2af72d5 | 2000-09-15 08:10:33 +0000 | [diff] [blame] | 663 | if (x < SHRT_MIN || x > SHRT_MAX){ |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 664 | PyErr_SetString(StructError, |
Martin v. Löwis | 2af72d5 | 2000-09-15 08:10:33 +0000 | [diff] [blame] | 665 | "short format requires " STRINGIFY(SHRT_MIN) |
| 666 | "<=number<=" STRINGIFY(SHRT_MAX)); |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 667 | return -1; |
| 668 | } |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 669 | * (short *)p = (short)x; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | static int |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 674 | np_ushort(char *p, PyObject *v, const formatdef *f) |
| 675 | { |
| 676 | long x; |
| 677 | if (get_long(v, &x) < 0) |
| 678 | return -1; |
Martin v. Löwis | 2af72d5 | 2000-09-15 08:10:33 +0000 | [diff] [blame] | 679 | if (x < 0 || x > USHRT_MAX){ |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 680 | PyErr_SetString(StructError, |
Martin v. Löwis | 2af72d5 | 2000-09-15 08:10:33 +0000 | [diff] [blame] | 681 | "short format requires 0<=number<=" STRINGIFY(USHRT_MAX)); |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 682 | return -1; |
| 683 | } |
| 684 | * (unsigned short *)p = (unsigned short)x; |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 689 | np_int(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 690 | { |
| 691 | long x; |
| 692 | if (get_long(v, &x) < 0) |
| 693 | return -1; |
| 694 | * (int *)p = x; |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 699 | np_uint(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 700 | { |
| 701 | unsigned long x; |
| 702 | if (get_ulong(v, &x) < 0) |
| 703 | return -1; |
| 704 | * (unsigned int *)p = x; |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 709 | np_long(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 710 | { |
| 711 | long x; |
| 712 | if (get_long(v, &x) < 0) |
| 713 | return -1; |
| 714 | * (long *)p = x; |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 719 | np_ulong(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 720 | { |
| 721 | unsigned long x; |
| 722 | if (get_ulong(v, &x) < 0) |
| 723 | return -1; |
| 724 | * (unsigned long *)p = x; |
| 725 | return 0; |
| 726 | } |
| 727 | |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 728 | #ifdef HAVE_LONG_LONG |
| 729 | |
| 730 | static int |
| 731 | np_longlong(char *p, PyObject *v, const formatdef *f) |
| 732 | { |
| 733 | LONG_LONG x; |
| 734 | if (get_longlong(v, &x) < 0) |
| 735 | return -1; |
| 736 | * (LONG_LONG *)p = x; |
| 737 | return 0; |
| 738 | } |
| 739 | |
| 740 | static int |
| 741 | np_ulonglong(char *p, PyObject *v, const formatdef *f) |
| 742 | { |
| 743 | unsigned LONG_LONG x; |
| 744 | if (get_ulonglong(v, &x) < 0) |
| 745 | return -1; |
| 746 | * (unsigned LONG_LONG *)p = x; |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | #else |
| 751 | |
| 752 | static int |
| 753 | np_qQerror(char *p, PyObject *v, const formatdef *f) |
| 754 | { |
| 755 | PyErr_SetString(StructError, qQ_error_msg); |
| 756 | return -1; |
| 757 | } |
| 758 | |
| 759 | #endif |
| 760 | |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 761 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 762 | np_float(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 763 | { |
| 764 | float x = (float)PyFloat_AsDouble(v); |
| 765 | if (x == -1 && PyErr_Occurred()) { |
| 766 | PyErr_SetString(StructError, |
| 767 | "required argument is not a float"); |
| 768 | return -1; |
| 769 | } |
| 770 | memcpy(p, (char *)&x, sizeof(float)); |
| 771 | return 0; |
| 772 | } |
| 773 | |
| 774 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 775 | np_double(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 776 | { |
| 777 | double x = PyFloat_AsDouble(v); |
| 778 | if (x == -1 && PyErr_Occurred()) { |
| 779 | PyErr_SetString(StructError, |
| 780 | "required argument is not a float"); |
| 781 | return -1; |
| 782 | } |
| 783 | memcpy(p, (char *)&x, sizeof(double)); |
| 784 | return 0; |
| 785 | } |
| 786 | |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 787 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 788 | np_void_p(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 789 | { |
| 790 | void *x = PyLong_AsVoidPtr(v); |
| 791 | if (x == NULL && PyErr_Occurred()) { |
| 792 | /* ### hrm. PyLong_AsVoidPtr raises SystemError */ |
| 793 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 794 | PyErr_SetString(StructError, |
| 795 | "required argument is not an integer"); |
| 796 | return -1; |
| 797 | } |
| 798 | *(void **)p = x; |
| 799 | return 0; |
| 800 | } |
| 801 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 802 | static formatdef native_table[] = { |
| 803 | {'x', sizeof(char), 0, NULL}, |
| 804 | {'b', sizeof(char), 0, nu_byte, np_byte}, |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 805 | {'B', sizeof(char), 0, nu_ubyte, np_ubyte}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 806 | {'c', sizeof(char), 0, nu_char, np_char}, |
| 807 | {'s', sizeof(char), 0, NULL}, |
Guido van Rossum | 9eb671f | 1997-09-05 07:08:39 +0000 | [diff] [blame] | 808 | {'p', sizeof(char), 0, NULL}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 809 | {'h', sizeof(short), SHORT_ALIGN, nu_short, np_short}, |
Martin v. Löwis | 66de549 | 2000-09-15 07:31:57 +0000 | [diff] [blame] | 810 | {'H', sizeof(short), SHORT_ALIGN, nu_ushort, np_ushort}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 811 | {'i', sizeof(int), INT_ALIGN, nu_int, np_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 812 | {'I', sizeof(int), INT_ALIGN, nu_uint, np_uint}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 813 | {'l', sizeof(long), LONG_ALIGN, nu_long, np_long}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 814 | {'L', sizeof(long), LONG_ALIGN, nu_ulong, np_ulong}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 815 | {'f', sizeof(float), FLOAT_ALIGN, nu_float, np_float}, |
| 816 | {'d', sizeof(double), DOUBLE_ALIGN, nu_double, np_double}, |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 817 | {'P', sizeof(void *), VOID_P_ALIGN, nu_void_p, np_void_p}, |
Tim Peters | 7b9542a | 2001-06-10 23:40:19 +0000 | [diff] [blame] | 818 | #ifdef HAVE_LONG_LONG |
| 819 | {'q', sizeof(LONG_LONG), LONG_LONG_ALIGN, nu_longlong, np_longlong}, |
| 820 | {'Q', sizeof(LONG_LONG), LONG_LONG_ALIGN, nu_ulonglong,np_ulonglong}, |
| 821 | #else |
| 822 | /* n[pu]_qQerror just raise errors, but give them "the expected" size |
| 823 | and alignment anyway so that calcsize returns something reasonable, |
| 824 | and so unpack code that works on a 'long long' platform ends up in |
| 825 | the error routine instead of with a mysterious "unpack str size |
| 826 | does not match format" msg when run on a non-'long long' box. */ |
| 827 | {'q', 8, 8, nu_qQerror, np_qQerror}, |
| 828 | {'Q', 8, 8, nu_qQerror, np_qQerror}, |
| 829 | #endif |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 830 | {0} |
| 831 | }; |
| 832 | |
| 833 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 834 | bu_int(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 835 | { |
| 836 | long x = 0; |
| 837 | int i = f->size; |
| 838 | do { |
| 839 | x = (x<<8) | (*p++ & 0xFF); |
| 840 | } while (--i > 0); |
Tim Peters | f0e717b | 2001-04-08 23:39:38 +0000 | [diff] [blame] | 841 | /* Extend the sign bit. */ |
| 842 | if (SIZEOF_LONG > f->size) |
| 843 | x |= -(x & (1L << (8*f->size - 1))); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 844 | return PyInt_FromLong(x); |
| 845 | } |
| 846 | |
| 847 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 848 | bu_uint(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 849 | { |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 850 | unsigned long x = 0; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 851 | int i = f->size; |
| 852 | do { |
| 853 | x = (x<<8) | (*p++ & 0xFF); |
| 854 | } while (--i > 0); |
Guido van Rossum | 39ef227 | 1998-06-29 04:00:40 +0000 | [diff] [blame] | 855 | if (f->size >= 4) |
| 856 | return PyLong_FromUnsignedLong(x); |
| 857 | else |
| 858 | return PyInt_FromLong((long)x); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 859 | } |
| 860 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 861 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 862 | bu_float(const char *p, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 863 | { |
| 864 | return unpack_float(p, 1); |
| 865 | } |
| 866 | |
| 867 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 868 | bu_double(const char *p, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 869 | { |
| 870 | return unpack_double(p, 1); |
| 871 | } |
| 872 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 873 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 874 | bp_int(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 875 | { |
| 876 | long x; |
| 877 | int i; |
| 878 | if (get_long(v, &x) < 0) |
| 879 | return -1; |
| 880 | i = f->size; |
| 881 | do { |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 882 | p[--i] = (char)x; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 883 | x >>= 8; |
| 884 | } while (i > 0); |
| 885 | return 0; |
| 886 | } |
| 887 | |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 888 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 889 | bp_uint(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 890 | { |
| 891 | unsigned long x; |
| 892 | int i; |
| 893 | if (get_ulong(v, &x) < 0) |
| 894 | return -1; |
| 895 | i = f->size; |
| 896 | do { |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 897 | p[--i] = (char)x; |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 898 | x >>= 8; |
| 899 | } while (i > 0); |
| 900 | return 0; |
| 901 | } |
| 902 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 903 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 904 | bp_float(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 905 | { |
| 906 | double x = PyFloat_AsDouble(v); |
| 907 | if (x == -1 && PyErr_Occurred()) { |
| 908 | PyErr_SetString(StructError, |
| 909 | "required argument is not a float"); |
| 910 | return -1; |
| 911 | } |
| 912 | return pack_float(x, p, 1); |
| 913 | } |
| 914 | |
| 915 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 916 | bp_double(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 917 | { |
| 918 | double x = PyFloat_AsDouble(v); |
| 919 | if (x == -1 && PyErr_Occurred()) { |
| 920 | PyErr_SetString(StructError, |
| 921 | "required argument is not a float"); |
| 922 | return -1; |
| 923 | } |
| 924 | return pack_double(x, p, 1); |
| 925 | } |
| 926 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 927 | static formatdef bigendian_table[] = { |
| 928 | {'x', 1, 0, NULL}, |
| 929 | {'b', 1, 0, bu_int, bp_int}, |
| 930 | {'B', 1, 0, bu_uint, bp_int}, |
| 931 | {'c', 1, 0, nu_char, np_char}, |
| 932 | {'s', 1, 0, NULL}, |
Guido van Rossum | 9eb671f | 1997-09-05 07:08:39 +0000 | [diff] [blame] | 933 | {'p', 1, 0, NULL}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 934 | {'h', 2, 0, bu_int, bp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 935 | {'H', 2, 0, bu_uint, bp_uint}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 936 | {'i', 4, 0, bu_int, bp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 937 | {'I', 4, 0, bu_uint, bp_uint}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 938 | {'l', 4, 0, bu_int, bp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 939 | {'L', 4, 0, bu_uint, bp_uint}, |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 940 | {'f', 4, 0, bu_float, bp_float}, |
| 941 | {'d', 8, 0, bu_double, bp_double}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 942 | {0} |
| 943 | }; |
| 944 | |
| 945 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 946 | lu_int(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 947 | { |
| 948 | long x = 0; |
| 949 | int i = f->size; |
| 950 | do { |
| 951 | x = (x<<8) | (p[--i] & 0xFF); |
| 952 | } while (i > 0); |
Tim Peters | f0e717b | 2001-04-08 23:39:38 +0000 | [diff] [blame] | 953 | /* Extend the sign bit. */ |
| 954 | if (SIZEOF_LONG > f->size) |
| 955 | x |= -(x & (1L << (8*f->size - 1))); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 956 | return PyInt_FromLong(x); |
| 957 | } |
| 958 | |
| 959 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 960 | lu_uint(const char *p, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 961 | { |
Guido van Rossum | 6c87eca | 1997-01-03 19:08:16 +0000 | [diff] [blame] | 962 | unsigned long x = 0; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 963 | int i = f->size; |
| 964 | do { |
| 965 | x = (x<<8) | (p[--i] & 0xFF); |
| 966 | } while (i > 0); |
Guido van Rossum | 39ef227 | 1998-06-29 04:00:40 +0000 | [diff] [blame] | 967 | if (f->size >= 4) |
| 968 | return PyLong_FromUnsignedLong(x); |
| 969 | else |
| 970 | return PyInt_FromLong((long)x); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 971 | } |
| 972 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 973 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 974 | lu_float(const char *p, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 975 | { |
| 976 | return unpack_float(p+3, -1); |
| 977 | } |
| 978 | |
| 979 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 980 | lu_double(const char *p, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 981 | { |
| 982 | return unpack_double(p+7, -1); |
| 983 | } |
| 984 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 985 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 986 | lp_int(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 987 | { |
| 988 | long x; |
| 989 | int i; |
| 990 | if (get_long(v, &x) < 0) |
| 991 | return -1; |
| 992 | i = f->size; |
| 993 | do { |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 994 | *p++ = (char)x; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 995 | x >>= 8; |
| 996 | } while (--i > 0); |
| 997 | return 0; |
| 998 | } |
| 999 | |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1000 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1001 | lp_uint(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1002 | { |
| 1003 | unsigned long x; |
| 1004 | int i; |
| 1005 | if (get_ulong(v, &x) < 0) |
| 1006 | return -1; |
| 1007 | i = f->size; |
| 1008 | do { |
Guido van Rossum | 7844e38 | 1997-04-11 20:44:04 +0000 | [diff] [blame] | 1009 | *p++ = (char)x; |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1010 | x >>= 8; |
| 1011 | } while (--i > 0); |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 1015 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1016 | lp_float(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 1017 | { |
| 1018 | double x = PyFloat_AsDouble(v); |
| 1019 | if (x == -1 && PyErr_Occurred()) { |
| 1020 | PyErr_SetString(StructError, |
| 1021 | "required argument is not a float"); |
| 1022 | return -1; |
| 1023 | } |
| 1024 | return pack_float(x, p+3, -1); |
| 1025 | } |
| 1026 | |
| 1027 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1028 | lp_double(char *p, PyObject *v, const formatdef *f) |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 1029 | { |
| 1030 | double x = PyFloat_AsDouble(v); |
| 1031 | if (x == -1 && PyErr_Occurred()) { |
| 1032 | PyErr_SetString(StructError, |
| 1033 | "required argument is not a float"); |
| 1034 | return -1; |
| 1035 | } |
| 1036 | return pack_double(x, p+7, -1); |
| 1037 | } |
| 1038 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1039 | static formatdef lilendian_table[] = { |
| 1040 | {'x', 1, 0, NULL}, |
| 1041 | {'b', 1, 0, lu_int, lp_int}, |
| 1042 | {'B', 1, 0, lu_uint, lp_int}, |
| 1043 | {'c', 1, 0, nu_char, np_char}, |
| 1044 | {'s', 1, 0, NULL}, |
Guido van Rossum | 9eb671f | 1997-09-05 07:08:39 +0000 | [diff] [blame] | 1045 | {'p', 1, 0, NULL}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1046 | {'h', 2, 0, lu_int, lp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1047 | {'H', 2, 0, lu_uint, lp_uint}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1048 | {'i', 4, 0, lu_int, lp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1049 | {'I', 4, 0, lu_uint, lp_uint}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1050 | {'l', 4, 0, lu_int, lp_int}, |
Guido van Rossum | 60c5061 | 1996-12-31 16:29:52 +0000 | [diff] [blame] | 1051 | {'L', 4, 0, lu_uint, lp_uint}, |
Guido van Rossum | 74679b4 | 1997-01-02 22:21:36 +0000 | [diff] [blame] | 1052 | {'f', 4, 0, lu_float, lp_float}, |
| 1053 | {'d', 8, 0, lu_double, lp_double}, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1054 | {0} |
| 1055 | }; |
| 1056 | |
| 1057 | |
| 1058 | static const formatdef * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1059 | whichtable(char **pfmt) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1060 | { |
| 1061 | const char *fmt = (*pfmt)++; /* May be backed out of later */ |
| 1062 | switch (*fmt) { |
| 1063 | case '<': |
| 1064 | return lilendian_table; |
| 1065 | case '>': |
| 1066 | case '!': /* Network byte order is big-endian */ |
| 1067 | return bigendian_table; |
| 1068 | case '=': { /* Host byte order -- different from native in aligment! */ |
| 1069 | int n = 1; |
| 1070 | char *p = (char *) &n; |
| 1071 | if (*p == 1) |
| 1072 | return lilendian_table; |
| 1073 | else |
| 1074 | return bigendian_table; |
| 1075 | } |
| 1076 | default: |
| 1077 | --*pfmt; /* Back out of pointer increment */ |
| 1078 | /* Fall through */ |
| 1079 | case '@': |
| 1080 | return native_table; |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | |
| 1085 | /* Get the table entry for a format code */ |
| 1086 | |
| 1087 | static const formatdef * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1088 | getentry(int c, const formatdef *f) |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1089 | { |
| 1090 | for (; f->format != '\0'; f++) { |
| 1091 | if (f->format == c) { |
| 1092 | return f; |
| 1093 | } |
| 1094 | } |
| 1095 | PyErr_SetString(StructError, "bad char in struct format"); |
| 1096 | return NULL; |
| 1097 | } |
| 1098 | |
| 1099 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1100 | /* Align a size according to a format code */ |
| 1101 | |
| 1102 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1103 | align(int size, int c, const formatdef *e) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1104 | { |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1105 | if (e->format == c) { |
| 1106 | if (e->alignment) { |
| 1107 | size = ((size + e->alignment - 1) |
| 1108 | / e->alignment) |
| 1109 | * e->alignment; |
| 1110 | } |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1111 | } |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1112 | return size; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | /* calculate the size of a format string */ |
| 1117 | |
| 1118 | static int |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1119 | calcsize(const char *fmt, const formatdef *f) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1120 | { |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1121 | const formatdef *e; |
| 1122 | const char *s; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1123 | char c; |
| 1124 | int size, num, itemsize, x; |
| 1125 | |
| 1126 | s = fmt; |
| 1127 | size = 0; |
| 1128 | while ((c = *s++) != '\0') { |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1129 | if (isspace((int)c)) |
Guido van Rossum | e20aef5 | 1997-08-26 20:39:54 +0000 | [diff] [blame] | 1130 | continue; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1131 | if ('0' <= c && c <= '9') { |
| 1132 | num = c - '0'; |
| 1133 | while ('0' <= (c = *s++) && c <= '9') { |
| 1134 | x = num*10 + (c - '0'); |
| 1135 | if (x/10 != num) { |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1136 | PyErr_SetString( |
| 1137 | StructError, |
| 1138 | "overflow in item count"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1139 | return -1; |
| 1140 | } |
| 1141 | num = x; |
| 1142 | } |
| 1143 | if (c == '\0') |
| 1144 | break; |
| 1145 | } |
| 1146 | else |
| 1147 | num = 1; |
| 1148 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1149 | e = getentry(c, f); |
| 1150 | if (e == NULL) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1151 | return -1; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1152 | itemsize = e->size; |
| 1153 | size = align(size, c, e); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1154 | x = num * itemsize; |
| 1155 | size += x; |
| 1156 | if (x/itemsize != num || size < 0) { |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1157 | PyErr_SetString(StructError, |
| 1158 | "total struct size too long"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1159 | return -1; |
| 1160 | } |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | return size; |
| 1164 | } |
| 1165 | |
| 1166 | |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 1167 | static char calcsize__doc__[] = "\ |
| 1168 | calcsize(fmt) -> int\n\ |
| 1169 | Return size of C struct described by format string fmt.\n\ |
| 1170 | See struct.__doc__ for more on format strings."; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1171 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1172 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1173 | struct_calcsize(PyObject *self, PyObject *args) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1174 | { |
| 1175 | char *fmt; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1176 | const formatdef *f; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1177 | int size; |
| 1178 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 1179 | if (!PyArg_ParseTuple(args, "s:calcsize", &fmt)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1180 | return NULL; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1181 | f = whichtable(&fmt); |
| 1182 | size = calcsize(fmt, f); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1183 | if (size < 0) |
| 1184 | return NULL; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1185 | return PyInt_FromLong((long)size); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1186 | } |
| 1187 | |
| 1188 | |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 1189 | static char pack__doc__[] = "\ |
| 1190 | pack(fmt, v1, v2, ...) -> string\n\ |
| 1191 | Return string containing values v1, v2, ... packed according to fmt.\n\ |
| 1192 | See struct.__doc__ for more on format strings."; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1193 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1194 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1195 | struct_pack(PyObject *self, PyObject *args) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1196 | { |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1197 | const formatdef *f, *e; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1198 | PyObject *format, *result, *v; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1199 | char *fmt; |
| 1200 | int size, num; |
| 1201 | int i, n; |
Guido van Rossum | b9d338c | 1997-01-03 15:40:33 +0000 | [diff] [blame] | 1202 | char *s, *res, *restart, *nres; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1203 | char c; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1204 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1205 | if (args == NULL || !PyTuple_Check(args) || |
| 1206 | (n = PyTuple_Size(args)) < 1) |
| 1207 | { |
Fred Drake | 137507e | 2000-06-01 02:02:46 +0000 | [diff] [blame] | 1208 | PyErr_SetString(PyExc_TypeError, |
| 1209 | "struct.pack requires at least one argument"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1210 | return NULL; |
| 1211 | } |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1212 | format = PyTuple_GetItem(args, 0); |
| 1213 | if (!PyArg_Parse(format, "s", &fmt)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1214 | return NULL; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1215 | f = whichtable(&fmt); |
| 1216 | size = calcsize(fmt, f); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1217 | if (size < 0) |
| 1218 | return NULL; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1219 | result = PyString_FromStringAndSize((char *)NULL, size); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1220 | if (result == NULL) |
| 1221 | return NULL; |
| 1222 | |
| 1223 | s = fmt; |
| 1224 | i = 1; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1225 | res = restart = PyString_AsString(result); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1226 | |
| 1227 | while ((c = *s++) != '\0') { |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1228 | if (isspace((int)c)) |
Guido van Rossum | e20aef5 | 1997-08-26 20:39:54 +0000 | [diff] [blame] | 1229 | continue; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1230 | if ('0' <= c && c <= '9') { |
| 1231 | num = c - '0'; |
| 1232 | while ('0' <= (c = *s++) && c <= '9') |
| 1233 | num = num*10 + (c - '0'); |
| 1234 | if (c == '\0') |
| 1235 | break; |
| 1236 | } |
| 1237 | else |
| 1238 | num = 1; |
| 1239 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1240 | e = getentry(c, f); |
| 1241 | if (e == NULL) |
| 1242 | goto fail; |
Guido van Rossum | b9d338c | 1997-01-03 15:40:33 +0000 | [diff] [blame] | 1243 | nres = restart + align((int)(res-restart), c, e); |
| 1244 | /* Fill padd bytes with zeros */ |
| 1245 | while (res < nres) |
| 1246 | *res++ = '\0'; |
Guido van Rossum | 3aa27fd | 1996-12-31 02:10:45 +0000 | [diff] [blame] | 1247 | if (num == 0 && c != 's') |
| 1248 | continue; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1249 | do { |
| 1250 | if (c == 'x') { |
| 1251 | /* doesn't consume arguments */ |
Guido van Rossum | 3aa27fd | 1996-12-31 02:10:45 +0000 | [diff] [blame] | 1252 | memset(res, '\0', num); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1253 | res += num; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1254 | break; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1255 | } |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1256 | if (i >= n) { |
| 1257 | PyErr_SetString(StructError, |
| 1258 | "insufficient arguments to pack"); |
| 1259 | goto fail; |
| 1260 | } |
| 1261 | v = PyTuple_GetItem(args, i++); |
| 1262 | if (v == NULL) |
| 1263 | goto fail; |
| 1264 | if (c == 's') { |
| 1265 | /* num is string size, not repeat count */ |
| 1266 | int n; |
| 1267 | if (!PyString_Check(v)) { |
| 1268 | PyErr_SetString(StructError, |
| 1269 | "argument for 's' must be a string"); |
| 1270 | goto fail; |
| 1271 | } |
| 1272 | n = PyString_Size(v); |
| 1273 | if (n > num) |
| 1274 | n = num; |
| 1275 | if (n > 0) |
| 1276 | memcpy(res, PyString_AsString(v), n); |
| 1277 | if (n < num) |
Guido van Rossum | 3aa27fd | 1996-12-31 02:10:45 +0000 | [diff] [blame] | 1278 | memset(res+n, '\0', num-n); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1279 | res += num; |
| 1280 | break; |
| 1281 | } |
Guido van Rossum | 9eb671f | 1997-09-05 07:08:39 +0000 | [diff] [blame] | 1282 | else if (c == 'p') { |
| 1283 | /* num is string size + 1, |
| 1284 | to fit in the count byte */ |
| 1285 | int n; |
| 1286 | num--; /* now num is max string size */ |
| 1287 | if (!PyString_Check(v)) { |
| 1288 | PyErr_SetString(StructError, |
| 1289 | "argument for 'p' must be a string"); |
| 1290 | goto fail; |
| 1291 | } |
| 1292 | n = PyString_Size(v); |
| 1293 | if (n > num) |
| 1294 | n = num; |
| 1295 | if (n > 0) |
| 1296 | memcpy(res+1, PyString_AsString(v), n); |
| 1297 | if (n < num) |
| 1298 | /* no real need, just to be nice */ |
| 1299 | memset(res+1+n, '\0', num-n); |
| 1300 | *res++ = n; /* store the length byte */ |
| 1301 | res += num; |
| 1302 | break; |
| 1303 | } |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1304 | else { |
| 1305 | if (e->pack(res, v, e) < 0) |
| 1306 | goto fail; |
| 1307 | res += e->size; |
| 1308 | } |
| 1309 | } while (--num > 0); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | if (i < n) { |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1313 | PyErr_SetString(StructError, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1314 | "too many arguments for pack format"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1315 | goto fail; |
| 1316 | } |
| 1317 | |
| 1318 | return result; |
| 1319 | |
| 1320 | fail: |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1321 | Py_DECREF(result); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1322 | return NULL; |
| 1323 | } |
| 1324 | |
| 1325 | |
Guido van Rossum | 9897f0f | 1997-12-21 06:46:20 +0000 | [diff] [blame] | 1326 | static char unpack__doc__[] = "\ |
| 1327 | unpack(fmt, string) -> (v1, v2, ...)\n\ |
| 1328 | Unpack the string, containing packed C structure data, according\n\ |
| 1329 | to fmt. Requires len(string)==calcsize(fmt).\n\ |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 1330 | See struct.__doc__ for more on format strings."; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1331 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1332 | static PyObject * |
Peter Schneider-Kamp | 41c36ff | 2000-07-10 12:29:26 +0000 | [diff] [blame] | 1333 | struct_unpack(PyObject *self, PyObject *args) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1334 | { |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1335 | const formatdef *f, *e; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1336 | char *str, *start, *fmt, *s; |
| 1337 | char c; |
Barry Warsaw | b9a781e | 1997-01-03 00:26:28 +0000 | [diff] [blame] | 1338 | int len, size, num; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1339 | PyObject *res, *v; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1340 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 1341 | if (!PyArg_ParseTuple(args, "ss#:unpack", &fmt, &start, &len)) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1342 | return NULL; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1343 | f = whichtable(&fmt); |
| 1344 | size = calcsize(fmt, f); |
| 1345 | if (size < 0) |
| 1346 | return NULL; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1347 | if (size != len) { |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1348 | PyErr_SetString(StructError, |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1349 | "unpack str size does not match format"); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1350 | return NULL; |
| 1351 | } |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1352 | res = PyList_New(0); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1353 | if (res == NULL) |
| 1354 | return NULL; |
| 1355 | str = start; |
| 1356 | s = fmt; |
| 1357 | while ((c = *s++) != '\0') { |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1358 | if (isspace((int)c)) |
Guido van Rossum | e20aef5 | 1997-08-26 20:39:54 +0000 | [diff] [blame] | 1359 | continue; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1360 | if ('0' <= c && c <= '9') { |
| 1361 | num = c - '0'; |
| 1362 | while ('0' <= (c = *s++) && c <= '9') |
| 1363 | num = num*10 + (c - '0'); |
| 1364 | if (c == '\0') |
| 1365 | break; |
| 1366 | } |
| 1367 | else |
| 1368 | num = 1; |
| 1369 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1370 | e = getentry(c, f); |
| 1371 | if (e == NULL) |
| 1372 | goto fail; |
| 1373 | str = start + align((int)(str-start), c, e); |
Guido van Rossum | 3aa27fd | 1996-12-31 02:10:45 +0000 | [diff] [blame] | 1374 | if (num == 0 && c != 's') |
| 1375 | continue; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1376 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1377 | do { |
| 1378 | if (c == 'x') { |
| 1379 | str += num; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1380 | break; |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1381 | } |
| 1382 | if (c == 's') { |
| 1383 | /* num is string size, not repeat count */ |
| 1384 | v = PyString_FromStringAndSize(str, num); |
| 1385 | if (v == NULL) |
| 1386 | goto fail; |
| 1387 | str += num; |
| 1388 | num = 0; |
| 1389 | } |
Guido van Rossum | 9eb671f | 1997-09-05 07:08:39 +0000 | [diff] [blame] | 1390 | else if (c == 'p') { |
| 1391 | /* num is string buffer size, |
| 1392 | not repeat count */ |
| 1393 | int n = *(unsigned char*)str; |
| 1394 | /* first byte (unsigned) is string size */ |
| 1395 | if (n >= num) |
| 1396 | n = num-1; |
| 1397 | v = PyString_FromStringAndSize(str+1, n); |
| 1398 | if (v == NULL) |
| 1399 | goto fail; |
| 1400 | str += num; |
| 1401 | num = 0; |
| 1402 | } |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1403 | else { |
| 1404 | v = e->unpack(str, e); |
| 1405 | if (v == NULL) |
| 1406 | goto fail; |
| 1407 | str += e->size; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1408 | } |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1409 | if (v == NULL || PyList_Append(res, v) < 0) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1410 | goto fail; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1411 | Py_DECREF(v); |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1412 | } while (--num > 0); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
Guido van Rossum | f7e6b4b | 1996-12-31 01:41:25 +0000 | [diff] [blame] | 1415 | v = PyList_AsTuple(res); |
| 1416 | Py_DECREF(res); |
| 1417 | return v; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1418 | |
| 1419 | fail: |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1420 | Py_DECREF(res); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1421 | return NULL; |
| 1422 | } |
| 1423 | |
Guido van Rossum | 90ddb7b | 1992-08-19 16:44:15 +0000 | [diff] [blame] | 1424 | |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1425 | /* List of functions */ |
| 1426 | |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1427 | static PyMethodDef struct_methods[] = { |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 1428 | {"calcsize", struct_calcsize, METH_VARARGS, calcsize__doc__}, |
| 1429 | {"pack", struct_pack, METH_VARARGS, pack__doc__}, |
| 1430 | {"unpack", struct_unpack, METH_VARARGS, unpack__doc__}, |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1431 | {NULL, NULL} /* sentinel */ |
| 1432 | }; |
| 1433 | |
| 1434 | |
| 1435 | /* Module initialization */ |
| 1436 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 1437 | DL_EXPORT(void) |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 1438 | initstruct(void) |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1439 | { |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1440 | PyObject *m, *d; |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1441 | |
| 1442 | /* Create the module and add the functions */ |
Guido van Rossum | 414fd48 | 1997-12-19 04:24:24 +0000 | [diff] [blame] | 1443 | m = Py_InitModule4("struct", struct_methods, struct__doc__, |
| 1444 | (PyObject*)NULL, PYTHON_API_VERSION); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1445 | |
| 1446 | /* Add some symbolic constants to the module */ |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1447 | d = PyModule_GetDict(m); |
Guido van Rossum | 0cb96de | 1997-10-01 04:29:29 +0000 | [diff] [blame] | 1448 | StructError = PyErr_NewException("struct.error", NULL, NULL); |
| 1449 | if (StructError == NULL) |
| 1450 | return; |
Barry Warsaw | 30695fa | 1996-12-12 23:32:31 +0000 | [diff] [blame] | 1451 | PyDict_SetItemString(d, "error", StructError); |
Guido van Rossum | 0297512 | 1992-08-17 08:55:12 +0000 | [diff] [blame] | 1452 | } |