speech signal process tools
源代码在线查看： getopt.c
/* * getopt - get option letter from argv * by Henry Spencer * posted to Usenet net.sources list */ #ifndef OS5 #ifdef SCCS static char *sccsid = "@(#)getopt.c 1.3 21 Mar 1998"; #endif #include char *optarg; /* Global argument pointer. */ int optind = 0; /* Global argv index. */ static char *scan = NULL; /* Private scan pointer. */ extern char *index(); int getopt(argc, argv, optstring) int argc; char *argv[]; char *optstring; { register char c; register char *place; optarg = NULL; if (scan == NULL || *scan == '\0') { if (optind == 0) optind++; if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') return(EOF); if (strcmp(argv[optind], "--")==0) { optind++; return(EOF); } scan = argv[optind]+1; optind++; } c = *scan++; place = index(optstring, c); if (place == NULL || c == ':') { fprintf(stderr, "%s: unknown option -%c\n", argv[0], c); return('?'); } place++; if (*place == ':') { if (*scan != '\0') { optarg = scan; scan = NULL; } else { optarg = argv[optind]; optind++; } } return(c); } #endif
