home *** CD-ROM | disk | FTP | other *** search
- /***********************************************************
- 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 or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI 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.
-
- ******************************************************************/
-
- /* Method object implementation */
-
- #include "allobjects.h"
-
- #include "token.h"
-
- typedef struct {
- OB_HEAD
- struct methodlist *m_ml;
- object *m_self;
- } methodobject;
-
- #include "protos/methodobject_protos.h"
-
- object *
- newmethodobject(ml, self)
- struct methodlist *ml;
- object *self;
- {
- methodobject *op = NEWOBJ(methodobject, &Methodtype);
- if (op != NULL) {
- op->m_ml = ml;
- XINCREF(self);
- op->m_self = self;
- }
- return (object *)op;
- }
-
- method
- getmethod(op)
- object *op;
- {
- if (!is_methodobject(op)) {
- err_badcall();
- return NULL;
- }
- return ((methodobject *)op) -> m_ml -> ml_meth;
- }
-
- object *
- getself(op)
- object *op;
- {
- if (!is_methodobject(op)) {
- err_badcall();
- return NULL;
- }
- return ((methodobject *)op) -> m_self;
- }
-
- int
- getflags(op)
- object *op;
- {
- if (!is_methodobject(op)) {
- err_badcall();
- return -1;
- }
- return ((methodobject *)op) -> m_ml -> ml_flags;
- }
-
- /* Methods (the standard built-in methods, that is) */
-
- static void
- meth_dealloc(m)
- methodobject *m;
- {
- XDECREF(m->m_self);
- free((char *)m);
- }
-
- static object *
- meth_getattr(m, name)
- methodobject *m;
- char *name;
- {
- if (strcmp(name, "__name__") == 0) {
- return newstringobject(m->m_ml->ml_name);
- }
- if (strcmp(name, "__doc__") == 0) {
- char *doc = m->m_ml->ml_doc;
- if (doc != NULL)
- return newstringobject(doc);
- INCREF(None);
- return None;
- }
- if (strcmp(name, "__self__") == 0) {
- object *self;
- if (getrestricted()) {
- err_setstr(RuntimeError,
- "method.__self__ not accessible in restricted mode");
- return NULL;
- }
- self = m->m_self;
- if (self == NULL)
- self = None;
- INCREF(self);
- return self;
- }
- if (strcmp(name, "__members__") == 0) {
- return mkvalue("[sss]", "__doc__", "__name__", "__self__");
- }
- err_setstr(AttributeError, name);
- return NULL;
- }
-
- static object *
- meth_repr(m)
- methodobject *m;
- {
- char buf[200];
- if (m->m_self == NULL)
- sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
- else
- sprintf(buf,
- "<built-in method %.80s of %.80s object at %lx>",
- m->m_ml->ml_name, m->m_self->ob_type->tp_name,
- (long)m->m_self);
- return newstringobject(buf);
- }
-
- static int
- meth_compare(a, b)
- methodobject *a, *b;
- {
- if (a->m_self != b->m_self)
- return cmpobject(a->m_self, b->m_self);
- if (a->m_ml->ml_meth == b->m_ml->ml_meth)
- return 0;
- if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
- return -1;
- else
- return 1;
- }
-
- static long
- meth_hash(a)
- methodobject *a;
- {
- long x;
- if (a->m_self == NULL)
- x = 0;
- else {
- x = hashobject(a->m_self);
- if (x == -1)
- return -1;
- }
- return x ^ (long) a->m_ml->ml_meth;
- }
-
- typeobject Methodtype = {
- OB_HEAD_INIT(&Typetype)
- 0,
- "builtin_function_or_method",
- sizeof(methodobject),
- 0,
- (destructor)meth_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)meth_getattr, /*tp_getattr*/
- 0, /*tp_setattr*/
- (cmpfunc)meth_compare, /*tp_compare*/
- (reprfunc)meth_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- (hashfunc)meth_hash, /*tp_hash*/
- };
-
- /* List all methods in a chain -- helper for findmethodinchain */
-
- static object *
- listmethodchain(chain)
- struct methodchain *chain;
- {
- struct methodchain *c;
- struct methodlist *ml;
- int i, n;
- object *v;
-
- n = 0;
- for (c = chain; c != NULL; c = c->link) {
- for (ml = c->methods; ml->ml_name != NULL; ml++)
- n++;
- }
- v = newlistobject(n);
- if (v == NULL)
- return NULL;
- i = 0;
- for (c = chain; c != NULL; c = c->link) {
- for (ml = c->methods; ml->ml_name != NULL; ml++) {
- setlistitem(v, i, newstringobject(ml->ml_name));
- i++;
- }
- }
- if (err_occurred()) {
- DECREF(v);
- return NULL;
- }
- sortlist(v);
- return v;
- }
-
- /* Find a method in a method chain */
-
- object *
- findmethodinchain(chain, self, name)
- struct methodchain *chain;
- object *self;
- char *name;
- {
- if (strcmp(name, "__methods__") == 0)
- return listmethodchain(chain);
- while (chain != NULL) {
- struct methodlist *ml = chain->methods;
- for (; ml->ml_name != NULL; ml++) {
- if (name[0] == ml->ml_name[0] &&
- strcmp(name+1, ml->ml_name+1) == 0)
- return newmethodobject(ml, self);
- }
- chain = chain->link;
- }
- err_setstr(AttributeError, name);
- return NULL;
- }
-
- /* Find a method in a single method list */
-
- object *
- findmethod(methods, self, name)
- struct methodlist *methods;
- object *self;
- char *name;
- {
- struct methodchain chain;
- chain.methods = methods;
- chain.link = NULL;
- return findmethodinchain(&chain, self, name);
- }
-