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68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/**
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* @file attgetopt.c
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* @ingroup wbxml2xml_tool
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* @ingroup xml2wbxml_tool
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*
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* AT&T's public domain implementation of getopt.
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*
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* From the mod.sources newsgroup, volume 3, issue 58, with modifications
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* to bring it up to 21st century C.
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*
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* Taken from Kannel Project (http://www.kannel.org/)
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*/
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#include <stdio.h>
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#include <string.h>
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#define ERR(s, c) if (opterr) (void) fprintf(stderr, "%s: %s\n", argv[0], s)
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int opterr = 1;
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int optind = 1;
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int optopt;
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char *optarg;
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int getopt(int argc, char **argv, char *opts)
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{
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static int sp = 1;
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register int c;
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register char *cp;
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if(sp == 1) {
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if(optind >= argc ||
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argv[optind][0] != '-' || argv[optind][1] == '\0')
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return(EOF);
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else if(strcmp(argv[optind], "--") == 0) {
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optind++;
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return(EOF);
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}
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}
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optopt = c = argv[optind][sp];
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if(c == ':' || (cp=strchr(opts, c)) == NULL) {
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ERR(": illegal option -- ", c);
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if(argv[optind][++sp] == '\0') {
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optind++;
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sp = 1;
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}
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return('?');
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}
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if(*++cp == ':') {
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if(argv[optind][sp+1] != '\0')
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optarg = &argv[optind++][sp+1];
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else if(++optind >= argc) {
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ERR(": option requires an argument -- ", c);
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sp = 1;
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return('?');
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} else
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optarg = argv[optind++];
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sp = 1;
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} else {
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if(argv[optind][++sp] == '\0') {
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sp = 1;
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optind++;
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}
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optarg = NULL;
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}
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return(c);
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}
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