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- /***********************************************************
- Copyright 1991, 1992, 1993, 1994 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.
-
- ******************************************************************/
-
- /* System module */
-
- /*
- Various bits of information used by the interpreter are collected in
- module 'sys'.
- Function member:
- - exit(sts): call (C, POSIX) exit(sts)
- Data members:
- - stdin, stdout, stderr: standard file objects
- - modules: the table of modules (dictionary)
- - path: module search path (list of strings)
- - argv: script arguments (list of strings)
- - ps1, ps2: optional primary and secondary prompts (strings)
- */
-
- #include "allobjects.h"
-
- #include "sysmodule.h"
- #include "import.h"
- #include "modsupport.h"
- #include "osdefs.h"
-
- object *sys_trace, *sys_profile;
-
- static object *sysdict;
-
- object *
- sysget(name)
- char *name;
- {
- return dictlookup(sysdict, name);
- }
-
- FILE *
- sysgetfile(name, def)
- char *name;
- FILE *def;
- {
- FILE *fp = NULL;
- object *v = sysget(name);
- if (v != NULL && is_fileobject(v))
- fp = getfilefile(v);
- if (fp == NULL)
- fp = def;
- return fp;
- }
-
- int
- sysset(name, v)
- char *name;
- object *v;
- {
- if (v == NULL) {
- if (dictlookup(sysdict, name) == NULL)
- return 0;
- else
- return dictremove(sysdict, name);
- }
- else
- return dictinsert(sysdict, name, v);
- }
-
- static object *
- sys_exit(self, args)
- object *self;
- object *args;
- {
- /* Raise SystemExit so callers may catch it or clean up. */
- err_setval(SystemExit, args);
- return NULL;
- }
-
- static object *
- sys_settrace(self, args)
- object *self;
- object *args;
- {
- if (args == None)
- args = NULL;
- else
- XINCREF(args);
- XDECREF(sys_trace);
- sys_trace = args;
- INCREF(None);
- return None;
- }
-
- static object *
- sys_setprofile(self, args)
- object *self;
- object *args;
- {
- if (args == None)
- args = NULL;
- else
- XINCREF(args);
- XDECREF(sys_profile);
- sys_profile = args;
- INCREF(None);
- return None;
- }
-
- #ifdef USE_MALLOPT
- /* Link with -lmalloc (or -lmpc) on an SGI */
- #include <malloc.h>
-
- static object *
- sys_mdebug(self, args)
- object *self;
- object *args;
- {
- int flag;
- if (!getargs(args, "i", &flag))
- return NULL;
- mallopt(M_DEBUG, flag);
- INCREF(None);
- return None;
- }
- #endif /* USE_MALLOPT */
-
- static struct methodlist sys_methods[] = {
- {"exit", sys_exit},
- #ifdef USE_MALLOPT
- {"mdebug", sys_mdebug},
- #endif
- {"setprofile", sys_setprofile},
- {"settrace", sys_settrace},
- {NULL, NULL} /* sentinel */
- };
-
- static object *sysin, *sysout, *syserr;
-
- static object *
- list_builtin_module_names()
- {
- object *list = newlistobject(0);
- int i;
- if (list == NULL)
- return NULL;
- for (i = 0; inittab[i].name != NULL; i++) {
- object *name = newstringobject(inittab[i].name);
- if (name == NULL)
- break;
- addlistitem(list, name);
- DECREF(name);
- }
- if (sortlist(list) != 0) {
- DECREF(list);
- list = NULL;
- }
- return list;
- }
-
- void
- initsys()
- {
- extern long getmaxint PROTO((void));
- extern char *getversion PROTO((void));
- extern char *getcopyright PROTO((void));
- extern int fclose PROTO((FILE *));
- object *m = initmodule("sys", sys_methods);
- object *v;
- sysdict = getmoduledict(m);
- INCREF(sysdict);
- /* NB keep an extra ref to the std files to avoid closing them
- when the user deletes them */
- sysin = newopenfileobject(stdin, "<stdin>", "r", fclose);
- sysout = newopenfileobject(stdout, "<stdout>", "w", fclose);
- syserr = newopenfileobject(stderr, "<stderr>", "w", fclose);
- if (err_occurred())
- fatal("can't initialize sys.std{in,out,err}");
- dictinsert(sysdict, "stdin", sysin);
- dictinsert(sysdict, "stdout", sysout);
- dictinsert(sysdict, "stderr", syserr);
- dictinsert(sysdict, "version", v = newstringobject(getversion()));
- XDECREF(v);
- dictinsert(sysdict, "copyright", v = newstringobject(getcopyright()));
- XDECREF(v);
- dictinsert(sysdict, "maxint", v = newintobject(getmaxint()));
- XDECREF(v);
- dictinsert(sysdict, "modules", get_modules());
- dictinsert(sysdict, "builtin_module_names",
- list_builtin_module_names());
- if (err_occurred())
- fatal("can't insert sys.* objects in sys dict");
- }
-
- static object *
- makepathobject(path, delim)
- char *path;
- int delim;
- {
- int i, n;
- char *p;
- object *v, *w;
-
- n = 1;
- p = path;
- while ((p = strchr(p, delim)) != NULL) {
- n++;
- p++;
- }
- v = newlistobject(n);
- if (v == NULL)
- return NULL;
- for (i = 0; ; i++) {
- p = strchr(path, delim);
- if (p == NULL)
- p = strchr(path, '\0'); /* End of string */
- w = newsizedstringobject(path, (int) (p - path));
- if (w == NULL) {
- DECREF(v);
- return NULL;
- }
- setlistitem(v, i, w);
- if (*p == '\0')
- break;
- path = p+1;
- }
- return v;
- }
-
- void
- setpythonpath(path)
- char *path;
- {
- object *v;
- if ((v = makepathobject(path, DELIM)) == NULL)
- fatal("can't create sys.path");
- if (sysset("path", v) != 0)
- fatal("can't assign sys.path");
- DECREF(v);
- }
-
- static object *
- makeargvobject(argc, argv)
- int argc;
- char **argv;
- {
- object *av;
- if (argc <= 0 || argv == NULL) {
- /* Ensure at least one (empty) argument is seen */
- static char *empty_argv[1] = {""};
- argv = empty_argv;
- argc = 1;
- }
- av = newlistobject(argc);
- if (av != NULL) {
- int i;
- for (i = 0; i < argc; i++) {
- object *v = newstringobject(argv[i]);
- if (v == NULL) {
- DECREF(av);
- av = NULL;
- break;
- }
- setlistitem(av, i, v);
- }
- }
- return av;
- }
-
- void
- setpythonargv(argc, argv)
- int argc;
- char **argv;
- {
- object *av = makeargvobject(argc, argv);
- if (av == NULL)
- fatal("no mem for sys.argv");
- if (sysset("argv", av) != 0)
- fatal("can't assign sys.argv");
- DECREF(av);
- }
-