mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
6d023c98b0
bltinmodule.c: fixed coerce() nightmare in ternary pow(). modsupport.c (initmodule2): pass METH_FREENAME flag to newmethodobject(). pythonrun.c: move flushline() into and around print_error().
463 lines
8.9 KiB
C
463 lines
8.9 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Module support implementation */
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#include "allobjects.h"
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#include "import.h"
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#ifdef MPW /* MPW pushes 'extended' for float and double types with varargs */
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typedef extended va_double;
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#else
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typedef double va_double;
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#endif
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/* initmodule2() has an additional parameter, 'passthrough', which is
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passed as 'self' to functions defined in the module. This is used
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e.g. by dynamically loaded modules on the Mac. */
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object *
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initmodule2(name, methods, passthrough)
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char *name;
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struct methodlist *methods;
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object *passthrough;
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{
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object *m, *d, *v;
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struct methodlist *ml;
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char *namebuf;
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if ((m = add_module(name)) == NULL) {
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fprintf(stderr, "initializing module: %s\n", name);
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fatal("can't create a module");
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}
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d = getmoduledict(m);
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for (ml = methods; ml->ml_name != NULL; ml++) {
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namebuf = NEW(char, strlen(name) + strlen(ml->ml_name) + 2);
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if (namebuf == NULL)
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fatal("out of mem for method name");
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sprintf(namebuf, "%s.%s", name, ml->ml_name);
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v = newmethodobject(namebuf, ml->ml_meth,
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(object *)passthrough,
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(ml->ml_varargs ? METH_VARARGS : 0) |
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METH_FREENAME);
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if (v == NULL || dictinsert(d, ml->ml_name, v) != 0) {
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fprintf(stderr, "initializing module: %s\n", name);
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fatal("can't initialize module");
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}
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DECREF(v);
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}
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return m;
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}
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/* The standard initmodule() passes NULL for 'self' */
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object *
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initmodule(name, methods)
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char *name;
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struct methodlist *methods;
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{
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return initmodule2(name, methods, (object *)NULL);
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}
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/* Helper for mkvalue() to scan the length of a format */
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static int countformat PROTO((char *format, int endchar));
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static int countformat(format, endchar)
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char *format;
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int endchar;
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{
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int count = 0;
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int level = 0;
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while (level > 0 || *format != endchar) {
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switch (*format) {
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case '\0':
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/* Premature end */
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err_setstr(SystemError, "unmatched paren in format");
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return -1;
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case '(':
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case '[':
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case '{':
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if (level == 0)
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count++;
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level++;
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break;
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case ')':
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case ']':
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case '}':
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level--;
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break;
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case '#':
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case ',':
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case ':':
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case ' ':
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case '\t':
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break;
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default:
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if (level == 0)
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count++;
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}
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format++;
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}
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return count;
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}
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/* Generic function to create a value -- the inverse of getargs() */
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/* After an original idea and first implementation by Steven Miale */
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static object *do_mktuple PROTO((char**, va_list *, int, int));
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static object *do_mklist PROTO((char**, va_list *, int, int));
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static object *do_mkdict PROTO((char**, va_list *, int, int));
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static object *do_mkvalue PROTO((char**, va_list *));
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static object *
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do_mkdict(p_format, p_va, endchar, n)
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char **p_format;
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va_list *p_va;
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int endchar;
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int n;
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{
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object *d;
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int i;
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if (n < 0)
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return NULL;
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if ((d = newdictobject()) == NULL)
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return NULL;
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for (i = 0; i < n; i+= 2) {
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object *k, *v;
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k = do_mkvalue(p_format, p_va);
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if (k == NULL) {
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DECREF(d);
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return NULL;
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}
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v = do_mkvalue(p_format, p_va);
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if (v == NULL) {
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DECREF(k);
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DECREF(d);
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return NULL;
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}
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if (dict2insert(d, k, v) < 0) {
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DECREF(k);
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DECREF(v);
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DECREF(d);
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return NULL;
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}
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}
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if (d != NULL && **p_format != endchar) {
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DECREF(d);
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d = NULL;
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err_setstr(SystemError, "Unmatched paren in format");
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}
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else if (endchar)
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++*p_format;
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return d;
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}
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static object *
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do_mklist(p_format, p_va, endchar, n)
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char **p_format;
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va_list *p_va;
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int endchar;
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int n;
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{
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object *v;
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int i;
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if (n < 0)
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return NULL;
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if ((v = newlistobject(n)) == NULL)
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return NULL;
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for (i = 0; i < n; i++) {
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object *w = do_mkvalue(p_format, p_va);
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if (w == NULL) {
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DECREF(v);
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return NULL;
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}
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setlistitem(v, i, w);
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}
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if (v != NULL && **p_format != endchar) {
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DECREF(v);
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v = NULL;
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err_setstr(SystemError, "Unmatched paren in format");
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}
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else if (endchar)
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++*p_format;
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return v;
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}
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static object *
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do_mktuple(p_format, p_va, endchar, n)
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char **p_format;
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va_list *p_va;
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int endchar;
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int n;
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{
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object *v;
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int i;
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if (n < 0)
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return NULL;
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if ((v = newtupleobject(n)) == NULL)
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return NULL;
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for (i = 0; i < n; i++) {
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object *w = do_mkvalue(p_format, p_va);
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if (w == NULL) {
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DECREF(v);
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return NULL;
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}
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settupleitem(v, i, w);
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}
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if (v != NULL && **p_format != endchar) {
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DECREF(v);
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v = NULL;
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err_setstr(SystemError, "Unmatched paren in format");
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}
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else if (endchar)
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++*p_format;
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return v;
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}
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static object *
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do_mkvalue(p_format, p_va)
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char **p_format;
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va_list *p_va;
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{
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for (;;) {
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switch (*(*p_format)++) {
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case '(':
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return do_mktuple(p_format, p_va, ')',
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countformat(*p_format, ')'));
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case '[':
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return do_mklist(p_format, p_va, ']',
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countformat(*p_format, ']'));
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case '{':
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return do_mkdict(p_format, p_va, '}',
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countformat(*p_format, '}'));
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case 'b':
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case 'h':
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case 'i':
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return newintobject((long)va_arg(*p_va, int));
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case 'l':
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return newintobject((long)va_arg(*p_va, long));
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case 'f':
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case 'd':
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return newfloatobject((double)va_arg(*p_va, double));
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case 'c':
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{
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char p[1];
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p[0] = va_arg(*p_va, int);
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return newsizedstringobject(p, 1);
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}
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case 's':
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case 'z':
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{
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object *v;
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char *str = va_arg(*p_va, char *);
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int n;
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if (**p_format == '#') {
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++*p_format;
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n = va_arg(*p_va, int);
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}
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else
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n = -1;
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if (str == NULL) {
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v = None;
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INCREF(v);
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}
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else {
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if (n < 0)
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n = strlen(str);
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v = newsizedstringobject(str, n);
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}
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return v;
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}
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case 'S':
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case 'O':
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{
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object *v;
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v = va_arg(*p_va, object *);
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if (v != NULL)
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INCREF(v);
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else if (!err_occurred())
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/* If a NULL was passed
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* because a call that should
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* have constructed a value
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* failed, that's OK, and we
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* pass the error on; but if
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* no error occurred it's not
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* clear that the caller knew
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* what she was doing. */
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err_setstr(SystemError,
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"NULL object passed to mkvalue");
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return v;
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}
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case ':':
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case ',':
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case ' ':
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case '\t':
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break;
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default:
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err_setstr(SystemError,
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"bad format char passed to mkvalue");
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return NULL;
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}
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}
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}
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#ifdef HAVE_STDARG_PROTOTYPES
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/* VARARGS 2 */
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object *mkvalue(char *format, ...)
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#else
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/* VARARGS */
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object *mkvalue(va_alist) va_dcl
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#endif
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{
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va_list va;
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object* retval;
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#ifdef HAVE_STDARG_PROTOTYPES
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va_start(va, format);
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#else
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char *format;
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va_start(va);
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format = va_arg(va, char *);
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#endif
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retval = vmkvalue(format, va);
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va_end(va);
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return retval;
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}
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object *
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vmkvalue(format, va)
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char *format;
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va_list va;
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{
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char *f = format;
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int n = countformat(f, '\0');
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va_list lva;
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#ifdef VA_LIST_IS_ARRAY
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memcpy(lva, va, sizeof(va_list));
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#else
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lva = va;
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#endif
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if (n < 0)
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return NULL;
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if (n == 0) {
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INCREF(None);
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return None;
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}
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if (n == 1)
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return do_mkvalue(&f, &lva);
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return do_mktuple(&f, &lva, '\0', n);
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}
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#ifdef HAVE_STDARG_PROTOTYPES
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object *
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PyEval_CallFunction(object *obj, char *format, ...)
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#else
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object *
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PyEval_CallFunction(obj, format, va_alist)
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object *obj;
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char *format;
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va_dcl
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#endif
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{
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va_list vargs;
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object *args;
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object *res;
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#ifdef HAVE_STDARG_PROTOTYPES
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va_start(vargs, format);
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#else
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va_start(vargs);
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#endif
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args = vmkvalue(format, vargs);
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va_end(vargs);
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if (args == NULL)
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return NULL;
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res = call_object(obj, args);
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DECREF(args);
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return res;
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}
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#ifdef HAVE_STDARG_PROTOTYPES
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object *
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PyEval_CallMethod(object *obj, char *method, char *format, ...)
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#else
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object *
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PyEval_CallMethod(obj, method, format, va_alist)
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object *obj;
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char *method;
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char *format;
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va_dcl
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#endif
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{
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va_list vargs;
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object *meth;
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object *args;
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object *res;
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meth = getattr(obj, method);
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if (meth == NULL)
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return NULL;
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#ifdef HAVE_STDARG_PROTOTYPES
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va_start(vargs, format);
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#else
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va_start(vargs);
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#endif
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args = vmkvalue(format, vargs);
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va_end(vargs);
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if (args == NULL) {
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DECREF(meth);
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return NULL;
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}
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res = call_object(meth, args);
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DECREF(meth);
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DECREF(args);
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return res;
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}
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