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#include <unistd.h> #include <wchar.h> #include <string.h> #include <limits.h> #include <stdlib.h> char *optarg; int optind=1, opterr=1, optopt; static int optpos; int getopt(int argc, char * const argv[], const char *optstring) { int i; wchar_t c, d; int k, l; char *optchar; if (optind >= argc || !argv[optind] || argv[optind][0] != '-' || !argv[optind][1]) return -1; if (argv[optind][1] == '-' && !argv[optind][2]) return optind++, -1; if (!optpos) optpos++; if ((k = mbtowc(&c, argv[optind]+optpos, MB_LEN_MAX)) < 0) { k = 1; c = 0xfffd; /* replacement char */ } optchar = argv[optind]+optpos; optopt = c; optpos += k; if (!argv[optind][optpos]) { optind++; optpos = 0; } for (i=0; (l = mbtowc(&d, optstring+i, MB_LEN_MAX)) && d!=c; i+=l>0?l:1); if (d != c) { if (optstring[0] != ':' && opterr) { write(2, argv[0], strlen(argv[0])); write(2, ": illegal option: ", 18); write(2, optchar, k); write(2, "\n", 1); } return '?'; } if (optstring[i+1] == ':') { if (optind >= argc) { if (optstring[0] == ':') return ':'; if (opterr) { write(2, argv[0], strlen(argv[0])); write(2, ": option requires an argument: ", 31); write(2, optchar, k); write(2, "\n", 1); } return '?'; } optarg = argv[optind++] + optpos; optpos = 0; } return c; } |