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https://git.osgeo.org/gitea/postgis/postgis
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105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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** @(#)getopt.c 2.5 (smail) 9/15/87
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*/
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#include "../postgis_config.h"
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "getopt.h"
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/*
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* Here's something you've all been waiting for: the AT&T public domain
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* source for getopt(3). It is the code which was given out at the 1985
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* UNIFORUM conference in Dallas. I obtained it by electronic mail
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* directly from AT&T. The people there assure me that it is indeed
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* in the public domain.
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*
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* There is no manual page. That is because the one they gave out at
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* UNIFORUM was slightly different from the current System V Release 2
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* manual page. The difference apparently involved a note about the
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* famous rules 5 and 6, recommending using white space between an option
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* and its first argument, and not grouping options that have arguments.
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* Getopt itself is currently lenient about both of these things. White
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* space is allowed, but not mandatory, and the last option in a group can
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* have an argument. That particular version of the man page evidently
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* has no official existence, and my source at AT&T did not send a copy.
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* The current SVR2 man page reflects the actual behavor of this getopt.
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* However, I am not about to post a copy of anything licensed by AT&T.
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*/
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#define ERR(s, c)\
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if(pgis_opterr){\
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char errbuf[2];\
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errbuf[0] = (char)c; errbuf[1] = '\n';\
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(void) write(2, argv[0], (unsigned)strlen(argv[0]));\
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(void) write(2, s, (unsigned)strlen(s));\
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(void) write(2, errbuf, 2);\
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}
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int pgis_opterr = 1;
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int pgis_optind = 1;
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int pgis_optopt;
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char *pgis_optarg;
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int
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pgis_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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{
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if (pgis_optind >= argc ||
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argv[pgis_optind][0] != '-' /* && argv[pgis_optind][0] != '/' */ ||
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argv[pgis_optind][1] == '\0')
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{
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return(EOF);
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}
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else if (strcmp(argv[pgis_optind], "--") == 0)
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{
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pgis_optind++;
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return(EOF);
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}
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}
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pgis_optopt = c = argv[pgis_optind][sp];
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if (c == ':' || (cp=strchr(opts, c)) == 0)
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{
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ERR(": illegal option -- ", c);
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if (argv[pgis_optind][++sp] == '\0')
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{
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pgis_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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{
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if (argv[pgis_optind][sp+1] != '\0')
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pgis_optarg = &argv[pgis_optind++][sp+1];
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else if (++pgis_optind >= argc)
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{
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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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}
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else
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pgis_optarg = argv[pgis_optind++];
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sp = 1;
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}
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else
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{
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if (argv[pgis_optind][++sp] == '\0')
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{
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sp = 1;
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pgis_optind++;
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}
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pgis_optarg = NULL;
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}
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return(c);
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}
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