mirror of https://github.com/python/cpython
313 lines
6.6 KiB
C
313 lines
6.6 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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/* System module */
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/*
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Various bits of information used by the interpreter are collected in
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module 'sys'.
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Function member:
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- exit(sts): raise SystemExit
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Data members:
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- stdin, stdout, stderr: standard file objects
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- modules: the table of modules (dictionary)
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- path: module search path (list of strings)
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- argv: script arguments (list of strings)
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- ps1, ps2: optional primary and secondary prompts (strings)
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*/
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#include "allobjects.h"
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#include "sysmodule.h"
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#include "import.h"
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#include "modsupport.h"
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#include "osdefs.h"
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object *sys_trace, *sys_profile;
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int sys_checkinterval = 10;
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static object *sysdict;
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object *
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sysget(name)
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char *name;
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{
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return dictlookup(sysdict, name);
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}
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FILE *
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sysgetfile(name, def)
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char *name;
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FILE *def;
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{
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FILE *fp = NULL;
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object *v = sysget(name);
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if (v != NULL && is_fileobject(v))
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fp = getfilefile(v);
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if (fp == NULL)
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fp = def;
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return fp;
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}
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int
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sysset(name, v)
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char *name;
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object *v;
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{
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if (v == NULL) {
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if (dictlookup(sysdict, name) == NULL)
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return 0;
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else
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return dictremove(sysdict, name);
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}
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else
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return dictinsert(sysdict, name, v);
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}
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static object *
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sys_exit(self, args)
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object *self;
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object *args;
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{
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/* Raise SystemExit so callers may catch it or clean up. */
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err_setval(SystemExit, args);
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return NULL;
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}
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static object *
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sys_settrace(self, args)
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object *self;
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object *args;
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{
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if (args == None)
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args = NULL;
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else
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XINCREF(args);
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XDECREF(sys_trace);
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sys_trace = args;
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INCREF(None);
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return None;
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}
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static object *
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sys_setprofile(self, args)
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object *self;
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object *args;
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{
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if (args == None)
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args = NULL;
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else
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XINCREF(args);
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XDECREF(sys_profile);
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sys_profile = args;
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INCREF(None);
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return None;
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}
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static object *
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sys_setcheckinterval(self, args)
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object *self;
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object *args;
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{
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if (!newgetargs(args, "i", &sys_checkinterval))
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return NULL;
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INCREF(None);
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return None;
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}
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#ifdef USE_MALLOPT
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/* Link with -lmalloc (or -lmpc) on an SGI */
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#include <malloc.h>
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static object *
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sys_mdebug(self, args)
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object *self;
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object *args;
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{
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int flag;
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if (!getargs(args, "i", &flag))
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return NULL;
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mallopt(M_DEBUG, flag);
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INCREF(None);
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return None;
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}
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#endif /* USE_MALLOPT */
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static struct methodlist sys_methods[] = {
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{"exit", sys_exit, 0},
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#ifdef USE_MALLOPT
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{"mdebug", sys_mdebug, 0},
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#endif
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{"setprofile", sys_setprofile, 0},
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{"settrace", sys_settrace, 0},
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{"setcheckinterval", sys_setcheckinterval, 0},
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{NULL, NULL} /* sentinel */
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};
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static object *sysin, *sysout, *syserr;
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static object *
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list_builtin_module_names()
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{
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object *list = newlistobject(0);
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int i;
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if (list == NULL)
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return NULL;
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for (i = 0; inittab[i].name != NULL; i++) {
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object *name = newstringobject(inittab[i].name);
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if (name == NULL)
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break;
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addlistitem(list, name);
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DECREF(name);
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}
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if (sortlist(list) != 0) {
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DECREF(list);
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list = NULL;
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}
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return list;
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}
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void
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initsys()
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{
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extern long getmaxint PROTO((void));
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extern char *getversion PROTO((void));
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extern char *getcopyright PROTO((void));
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extern int fclose PROTO((FILE *));
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object *m = initmodule("sys", sys_methods);
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object *v;
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sysdict = getmoduledict(m);
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INCREF(sysdict);
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/* NB keep an extra ref to the std files to avoid closing them
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when the user deletes them */
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sysin = newopenfileobject(stdin, "<stdin>", "r", fclose);
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sysout = newopenfileobject(stdout, "<stdout>", "w", fclose);
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syserr = newopenfileobject(stderr, "<stderr>", "w", fclose);
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if (err_occurred())
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fatal("can't initialize sys.std{in,out,err}");
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dictinsert(sysdict, "stdin", sysin);
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dictinsert(sysdict, "stdout", sysout);
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dictinsert(sysdict, "stderr", syserr);
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dictinsert(sysdict, "version", v = newstringobject(getversion()));
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XDECREF(v);
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dictinsert(sysdict, "copyright", v = newstringobject(getcopyright()));
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XDECREF(v);
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dictinsert(sysdict, "maxint", v = newintobject(getmaxint()));
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XDECREF(v);
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dictinsert(sysdict, "modules", get_modules());
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dictinsert(sysdict, "builtin_module_names",
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v = list_builtin_module_names());
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XDECREF(v);
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if (err_occurred())
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fatal("can't insert sys.* objects in sys dict");
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}
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static object *
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makepathobject(path, delim)
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char *path;
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int delim;
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{
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int i, n;
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char *p;
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object *v, *w;
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n = 1;
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p = path;
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while ((p = strchr(p, delim)) != NULL) {
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n++;
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p++;
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}
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v = newlistobject(n);
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if (v == NULL)
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return NULL;
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for (i = 0; ; i++) {
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p = strchr(path, delim);
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if (p == NULL)
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p = strchr(path, '\0'); /* End of string */
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w = newsizedstringobject(path, (int) (p - path));
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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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if (*p == '\0')
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break;
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path = p+1;
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}
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return v;
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}
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void
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setpythonpath(path)
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char *path;
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{
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object *v;
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if ((v = makepathobject(path, DELIM)) == NULL)
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fatal("can't create sys.path");
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if (sysset("path", v) != 0)
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fatal("can't assign sys.path");
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DECREF(v);
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}
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static object *
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makeargvobject(argc, argv)
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int argc;
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char **argv;
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{
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object *av;
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if (argc <= 0 || argv == NULL) {
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/* Ensure at least one (empty) argument is seen */
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static char *empty_argv[1] = {""};
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argv = empty_argv;
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argc = 1;
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}
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av = newlistobject(argc);
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if (av != NULL) {
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int i;
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for (i = 0; i < argc; i++) {
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object *v = newstringobject(argv[i]);
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if (v == NULL) {
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DECREF(av);
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av = NULL;
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break;
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}
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setlistitem(av, i, v);
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}
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}
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return av;
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}
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void
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setpythonargv(argc, argv)
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int argc;
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char **argv;
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{
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object *av = makeargvobject(argc, argv);
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if (av == NULL)
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fatal("no mem for sys.argv");
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if (sysset("argv", av) != 0)
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fatal("can't assign sys.argv");
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DECREF(av);
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}
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