Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 86:a6934380c6e7 legacy-trunk
"Compiling" version
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 20 Dec 1990 15:06:42 +0000 |
| parents | f6bcf3c1d714 |
| children | 853b736a6a9e |
| rev | line source |
|---|---|
| 6 | 1 /* System module */ |
| 2 | |
| 3 /* | |
| 4 Various bits of information used by the interpreter are collected in | |
| 5 module 'sys'. | |
| 86 | 6 Function member: |
| 7 - exit(sts): call (C, POSIX) exit(sts) | |
| 6 | 8 Data members: |
| 9 - stdin, stdout, stderr: standard file objects | |
| 86 | 10 - modules: the table of modules (dictionary) |
| 6 | 11 - path: module search path (list of strings) |
| 86 | 12 - argv: script arguments (list of strings) |
| 13 - ps1, ps2: optional primary and secondary prompts (strings) | |
| 6 | 14 */ |
| 15 | |
| 86 | 16 #include "allobjects.h" |
| 17 | |
| 18 #include "sysmodule.h" | |
| 19 #include "import.h" | |
| 20 #include "modsupport.h" | |
| 21 | |
| 22 /* Define delimiter used in $PYTHONPATH */ | |
| 6 | 23 |
| 86 | 24 #ifdef THINK_C |
| 25 #define DELIM ' ' | |
| 26 #endif | |
| 27 | |
| 28 #ifndef DELIM | |
| 29 #define DELIM ':' | |
| 30 #endif | |
| 6 | 31 |
| 32 static object *sysdict; | |
| 33 | |
| 34 object * | |
| 35 sysget(name) | |
| 36 char *name; | |
| 37 { | |
| 38 return dictlookup(sysdict, name); | |
| 39 } | |
| 40 | |
| 41 FILE * | |
| 42 sysgetfile(name, def) | |
| 43 char *name; | |
| 44 FILE *def; | |
| 45 { | |
| 46 FILE *fp = NULL; | |
| 47 object *v = sysget(name); | |
| 48 if (v != NULL) | |
| 49 fp = getfilefile(v); | |
| 50 if (fp == NULL) | |
| 51 fp = def; | |
| 52 return fp; | |
| 53 } | |
| 54 | |
| 55 int | |
| 56 sysset(name, v) | |
| 57 char *name; | |
| 58 object *v; | |
| 59 { | |
| 60 if (v == NULL) | |
| 61 return dictremove(sysdict, name); | |
| 62 else | |
| 63 return dictinsert(sysdict, name, v); | |
| 64 } | |
| 65 | |
| 66 static object * | |
| 67 sys_exit(self, args) | |
| 68 object *self; | |
| 69 object *args; | |
| 70 { | |
| 71 int sts; | |
| 72 if (!getintarg(args, &sts)) | |
| 73 return NULL; | |
| 74 goaway(sts); | |
| 75 exit(sts); /* Just in case */ | |
| 76 /* NOTREACHED */ | |
| 77 } | |
| 78 | |
| 86 | 79 static struct methodlist sys_methods[] = { |
| 80 {"exit", sys_exit}, | |
| 81 {NULL, NULL} /* sentinel */ | |
| 82 }; | |
| 83 | |
| 6 | 84 static object *sysin, *sysout, *syserr; |
| 85 | |
| 86 void | |
| 86 | 87 initsys() |
| 6 | 88 { |
| 86 | 89 object *m = initmodule("sys", sys_methods); |
| 90 sysdict = getmoduledict(m); | |
| 91 INCREF(sysdict); | |
| 6 | 92 /* NB keep an extra ref to the std files to avoid closing them |
| 93 when the user deletes them */ | |
| 86 | 94 /* XXX File objects should have a "don't close" flag instead */ |
| 6 | 95 sysin = newopenfileobject(stdin, "<stdin>", "r"); |
| 96 sysout = newopenfileobject(stdout, "<stdout>", "w"); | |
| 97 syserr = newopenfileobject(stderr, "<stderr>", "w"); | |
| 98 if (err_occurred()) | |
| 86 | 99 fatal("can't create sys.std* file objects"); |
| 6 | 100 dictinsert(sysdict, "stdin", sysin); |
| 101 dictinsert(sysdict, "stdout", sysout); | |
| 102 dictinsert(sysdict, "stderr", syserr); | |
| 86 | 103 dictinsert(sysdict, "modules", get_modules()); |
| 6 | 104 if (err_occurred()) |
| 105 fatal("can't insert sys.* objects in sys dict"); | |
| 86 | 106 } |
| 107 | |
| 108 static object * | |
| 109 makepathobject(path, delim) | |
| 110 char *path; | |
| 111 int delim; | |
| 112 { | |
| 113 int i, n; | |
| 114 char *p; | |
| 115 object *v, *w; | |
| 6 | 116 |
| 86 | 117 n = 1; |
| 118 p = path; | |
| 119 while ((p = strchr(p, delim)) != NULL) { | |
| 120 n++; | |
| 121 p++; | |
| 122 } | |
| 123 v = newlistobject(n); | |
| 124 if (v == NULL) | |
| 125 return NULL; | |
| 126 for (i = 0; ; i++) { | |
| 127 p = strchr(path, delim); | |
| 128 if (p == NULL) | |
| 129 p = strchr(path, '\0'); /* End of string */ | |
| 130 w = newsizedstringobject(path, (int) (p - path)); | |
| 131 if (w == NULL) { | |
| 132 DECREF(v); | |
| 133 return NULL; | |
| 134 } | |
| 135 setlistitem(v, i, w); | |
| 136 if (*p == '\0') | |
| 137 break; | |
| 138 path = p+1; | |
| 139 } | |
| 140 return v; | |
| 141 } | |
| 142 | |
| 143 void | |
| 144 setpythonpath(path) | |
| 145 char *path; | |
| 146 { | |
| 147 object *v; | |
| 148 if ((v = makepathobject(path, DELIM)) == NULL) | |
| 149 fatal("can't create sys.path"); | |
| 150 if (sysset("path", v) != 0) | |
| 151 fatal("can't assign sys.path"); | |
|
83
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
152 DECREF(v); |
|
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
153 } |
|
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
154 |
| 86 | 155 static object * |
| 156 makeargvobject(argc, argv) | |
| 157 int argc; | |
| 158 char **argv; | |
|
83
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
159 { |
| 86 | 160 object *av; |
| 161 if (argc < 0 || argv == NULL) | |
| 162 argc = 0; | |
| 163 av = newlistobject(argc); | |
| 164 if (av != NULL) { | |
| 165 int i; | |
| 166 for (i = 0; i < argc; i++) { | |
| 167 object *v = newstringobject(argv[i]); | |
| 168 if (v == NULL) { | |
| 169 DECREF(av); | |
| 170 av = NULL; | |
| 171 break; | |
| 172 } | |
| 173 setlistitem(av, i, v); | |
|
83
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
174 } |
|
f6bcf3c1d714
Empty all modules' symbol tables, so most circular references are
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
175 } |
| 86 | 176 return av; |
| 6 | 177 } |
| 178 | |
| 179 void | |
| 86 | 180 setpythonargv(argc, argv) |
| 181 int argc; | |
| 182 char **argv; | |
| 6 | 183 { |
| 86 | 184 object *av = makeargvobject(argc, argv); |
| 185 if (av == NULL) | |
| 186 fatal("no mem for sys.argv"); | |
| 187 if (sysset("argv", av) != 0) | |
| 188 fatal("can't assign sys.argv"); | |
| 189 DECREF(av); | |
| 6 | 190 } |