Source

cpython-withatomic / Python / modsupport.c

The branch 'legacy-trunk' does not exist.
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

******************************************************************/

/* Module support implementation */

#include "allobjects.h"
#include "import.h"

#ifdef MPW /* MPW pushes 'extended' for float and double types with varargs */
typedef extended va_double;
#else
typedef double va_double;
#endif

/* initmodule4() parameters:
   - name is the module name
   - methods is the list of top-level functions
   - doc is the documentation string
   - passthrough is passed as self to functions defined in the module
   - api_version is the value of PYTHON_API_VERSION at the time the
     module was compiled
*/

static char api_version_warning[] =
"WARNING: Python C API version mismatch for module %s:\n\
  This Python has API version %d, module %s has version %d.\n";

object *
initmodule4(name, methods, doc, passthrough, module_api_version)
	char *name;
	struct methodlist *methods;
	char *doc;
	object *passthrough;
	int module_api_version;
{
	object *m, *d, *v;
	struct methodlist *ml;
	if (module_api_version != PYTHON_API_VERSION)
		fprintf(stderr, api_version_warning,
			name, PYTHON_API_VERSION, name, module_api_version);
	if ((m = add_module(name)) == NULL) {
		fprintf(stderr, "initializing module: %s\n", name);
		fatal("can't create a module");
	}
	d = getmoduledict(m);
	for (ml = methods; ml->ml_name != NULL; ml++) {
		v = newmethodobject(ml, passthrough);
		if (v == NULL || dictinsert(d, ml->ml_name, v) != 0) {
			fprintf(stderr, "initializing module: %s\n", name);
			fatal("can't initialize module");
		}
		DECREF(v);
	}
	if (doc != NULL) {
		v = newstringobject(doc);
		if (v == NULL || dictinsert(d, "__doc__", v) != 0)
			fatal("can't add doc string");
		DECREF(v);
	}
	return m;
}


/* Helper for mkvalue() to scan the length of a format */

static int countformat PROTO((char *format, int endchar));
static int countformat(format, endchar)
	char *format;
	int endchar;
{
	int count = 0;
	int level = 0;
	while (level > 0 || *format != endchar) {
		switch (*format) {
		case '\0':
			/* Premature end */
			err_setstr(SystemError, "unmatched paren in format");
			return -1;
		case '(':
		case '[':
		case '{':
			if (level == 0)
				count++;
			level++;
			break;
		case ')':
		case ']':
		case '}':
			level--;
			break;
		case '#':
		case '&':
		case ',':
		case ':':
		case ' ':
		case '\t':
			break;
		default:
			if (level == 0)
				count++;
		}
		format++;
	}
	return count;
}


/* Generic function to create a value -- the inverse of getargs() */
/* After an original idea and first implementation by Steven Miale */

static object *do_mktuple PROTO((char**, va_list *, int, int));
static object *do_mklist PROTO((char**, va_list *, int, int));
static object *do_mkdict PROTO((char**, va_list *, int, int));
static object *do_mkvalue PROTO((char**, va_list *));


static object *
do_mkdict(p_format, p_va, endchar, n)
	char **p_format;
	va_list *p_va;
	int endchar;
	int n;
{
	object *d;
	int i;
	if (n < 0)
		return NULL;
	if ((d = newdictobject()) == NULL)
		return NULL;
	for (i = 0; i < n; i+= 2) {
		object *k, *v;
		k = do_mkvalue(p_format, p_va);
		if (k == NULL) {
			DECREF(d);
			return NULL;
		}
		v = do_mkvalue(p_format, p_va);
		if (v == NULL) {
			DECREF(k);
			DECREF(d);
			return NULL;
		}
		if (dict2insert(d, k, v) < 0) {
			DECREF(k);
			DECREF(v);
			DECREF(d);
			return NULL;
		}
	}
	if (d != NULL && **p_format != endchar) {
		DECREF(d);
		d = NULL;
		err_setstr(SystemError, "Unmatched paren in format");
	}
	else if (endchar)
		++*p_format;
	return d;
}

static object *
do_mklist(p_format, p_va, endchar, n)
	char **p_format;
	va_list *p_va;
	int endchar;
	int n;
{
	object *v;
	int i;
	if (n < 0)
		return NULL;
	if ((v = newlistobject(n)) == NULL)
		return NULL;
	for (i = 0; i < n; i++) {
		object *w = do_mkvalue(p_format, p_va);
		if (w == NULL) {
			DECREF(v);
			return NULL;
		}
		setlistitem(v, i, w);
	}
	if (v != NULL && **p_format != endchar) {
		DECREF(v);
		v = NULL;
		err_setstr(SystemError, "Unmatched paren in format");
	}
	else if (endchar)
		++*p_format;
	return v;
}

static object *
do_mktuple(p_format, p_va, endchar, n)
	char **p_format;
	va_list *p_va;
	int endchar;
	int n;
{
	object *v;
	int i;
	if (n < 0)
		return NULL;
	if ((v = newtupleobject(n)) == NULL)
		return NULL;
	for (i = 0; i < n; i++) {
		object *w = do_mkvalue(p_format, p_va);
		if (w == NULL) {
			DECREF(v);
			return NULL;
		}
		settupleitem(v, i, w);
	}
	if (v != NULL && **p_format != endchar) {
		DECREF(v);
		v = NULL;
		err_setstr(SystemError, "Unmatched paren in format");
	}
	else if (endchar)
		++*p_format;
	return v;
}

static object *
do_mkvalue(p_format, p_va)
	char **p_format;
	va_list *p_va;
{
	for (;;) {
		switch (*(*p_format)++) {
		case '(':
			return do_mktuple(p_format, p_va, ')',
					  countformat(*p_format, ')'));

		case '[':
			return do_mklist(p_format, p_va, ']',
					 countformat(*p_format, ']'));

		case '{':
			return do_mkdict(p_format, p_va, '}',
					 countformat(*p_format, '}'));

		case 'b':
		case 'h':
		case 'i':
			return newintobject((long)va_arg(*p_va, int));

		case 'l':
			return newintobject((long)va_arg(*p_va, long));

		case 'f':
		case 'd':
			return newfloatobject((double)va_arg(*p_va, va_double));

		case 'c':
		{
			char p[1];
			p[0] = va_arg(*p_va, int);
			return newsizedstringobject(p, 1);
		}

		case 's':
		case 'z':
		{
			object *v;
			char *str = va_arg(*p_va, char *);
			int n;
			if (**p_format == '#') {
				++*p_format;
				n = va_arg(*p_va, int);
			}
			else
				n = -1;
			if (str == NULL) {
				v = None;
				INCREF(v);
			}
			else {
				if (n < 0)
					n = strlen(str);
				v = newsizedstringobject(str, n);
			}
			return v;
		}

		case 'S':
		case 'O':
		if (**p_format == '&') {
			typedef object *(*converter) PROTO((void *));
			converter func = va_arg(*p_va, converter);
			void *arg = va_arg(*p_va, void *);
			++*p_format;
			return (*func)(arg);
		}
		else {
			object *v;
			v = va_arg(*p_va, object *);
			if (v != NULL)
				INCREF(v);
			else if (!err_occurred())
				/* If a NULL was passed
				 * because a call that should
				 * have constructed a value
				 * failed, that's OK, and we
				 * pass the error on; but if
				 * no error occurred it's not
				 * clear that the caller knew
				 * what she was doing. */
				err_setstr(SystemError,
					   "NULL object passed to mkvalue");
			return v;
		}

		case ':':
		case ',':
		case ' ':
		case '\t':
			break;

		default:
			err_setstr(SystemError,
				   "bad format char passed to mkvalue");
			return NULL;

		}
	}
}


#ifdef HAVE_STDARG_PROTOTYPES
/* VARARGS 2 */
object *mkvalue(char *format, ...)
#else
/* VARARGS */
object *mkvalue(va_alist) va_dcl
#endif
{
	va_list va;
	object* retval;
#ifdef HAVE_STDARG_PROTOTYPES
	va_start(va, format);
#else
	char *format;
	va_start(va);
	format = va_arg(va, char *);
#endif
	retval = vmkvalue(format, va);
	va_end(va);
	return retval;
}

object *
vmkvalue(format, va)
	char *format;
	va_list va;
{
	char *f = format;
	int n = countformat(f, '\0');
	va_list lva;

#ifdef VA_LIST_IS_ARRAY
	memcpy(lva, va, sizeof(va_list));
#else
	lva = va;
#endif

	if (n < 0)
		return NULL;
	if (n == 0) {
		INCREF(None);
		return None;
	}
	if (n == 1)
		return do_mkvalue(&f, &lva);
	return do_mktuple(&f, &lva, '\0', n);
}


#ifdef HAVE_STDARG_PROTOTYPES
object *
PyEval_CallFunction(object *obj, char *format, ...)
#else
object *
PyEval_CallFunction(obj, format, va_alist)
	object *obj;
	char *format;
	va_dcl
#endif
{
	va_list vargs;
	object *args;
	object *res;

#ifdef HAVE_STDARG_PROTOTYPES
	va_start(vargs, format);
#else
	va_start(vargs);
#endif

	args = vmkvalue(format, vargs);
	va_end(vargs);

	if (args == NULL)
		return NULL;

	res = call_object(obj, args);
	DECREF(args);

	return res;
}


#ifdef HAVE_STDARG_PROTOTYPES
object *
PyEval_CallMethod(object *obj, char *methonname, char *format, ...)
#else
object *
PyEval_CallMethod(obj, methonname, format, va_alist)
	object *obj;
	char *methonname;
	char *format;
	va_dcl
#endif
{
	va_list vargs;
	object *meth;
	object *args;
	object *res;

	meth = getattr(obj, methonname);
	if (meth == NULL)
		return NULL;

#ifdef HAVE_STDARG_PROTOTYPES
	va_start(vargs, format);
#else
	va_start(vargs);
#endif

	args = vmkvalue(format, vargs);
	va_end(vargs);

	if (args == NULL) {
		DECREF(meth);
		return NULL;
	}

	res = call_object(meth, args);
	DECREF(meth);
	DECREF(args);

	return res;
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.