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/*
* This is a version of the public domain getopt implementation by
* Henry Spencer originally posted to net.sources.
*
* This file is in the public domain.
*/
#include <stdio.h>
#include <string.h>
#include "mupdf/fitz/getopt.h"
#include "mupdf/fitz/string-util.h"
char *fz_optarg; /* Global argument pointer. */
int fz_optind = 0; /* Global argv index. */
const fz_getopt_long_options *fz_optlong = NULL;
int fz_optitem = 0; /* Which item in a long opt list is selected? */
static int
match_long_option(int argc, char * const *argv, const fz_getopt_long_options *longopts, char *opt)
{
if (longopts == NULL)
{
fprintf(stderr, "%s: unknown option --%s\n", argv[0], opt);
return '?';
}
while (longopts->option)
{
const char *s = longopts->option;
const char *eq = strchr(s, '=');
size_t z = eq ? (size_t)(eq-s) : strlen(s);
int arg = 0; /* No arg */
if (s[z] == '=')
arg = 1; /* arg = 1 => Arg list given */
else if (z && s[z-1] == ':')
arg = 2, z--; /* arg = 2 -> argument expected */
/* If we don't match, try the next one. */
/* If we aren't expecting an argument, and the given string is longer than expected, try the next one. */
/* If we are expecting an argument, and the given string doesn't either terminate or end in '=', try the next one. */
if (strncmp(s, opt, z) || (arg == 0 && opt[z] != 0) || (arg != 0 && opt[z] != 0 && opt[z] != '='))
{
longopts++;
continue;
}
/* So we have a match. */
fz_optind++;
if (opt[z])
fz_optarg = &opt[z+1];
else if (fz_optind < argc)
fz_optarg = argv[fz_optind++];
else
{
fprintf(stderr, "%s: option requires argument --%s\n", argv[0], s);
return ':';
}
/* If there is an arg from a predefined list, try to match that here. */
if (arg == 1)
{
fz_optitem = fz_opt_from_list(&opt[z+1], &s[z+1]);
if (longopts->flag)
*longopts->flag = fz_optitem;
if (fz_optitem < 0)
return '?';
}
else if (arg == 2 && longopts->flag)
{
char *p = strchr(fz_optarg, ',');
if (*fz_optarg == 0)
{
fprintf(stderr, "%s: option requires argument --%s\n", argv[0], s);
return ':';
}
else if (!fz_strcasecmp(fz_optarg, "yes") || !fz_strcasecmp(fz_optarg, "on") || !fz_strcasecmp(fz_optarg, "true"))
*longopts->flag = 1;
else if (!fz_strcasecmp(fz_optarg, "no") || !fz_strcasecmp(fz_optarg, "off") || !fz_strcasecmp(fz_optarg, "false"))
*longopts->flag = 0;
else
*longopts->flag = fz_atoi(fz_optarg);
fz_optarg = p ? p+1 : NULL;
}
fz_optlong = longopts;
return 0;
}
fprintf(stderr, "%s: unknown option --%s\n", argv[0], opt);
return '?';
}
static char *scan = NULL; /* Private scan pointer. */
int
fz_getopt_long(int argc, char * const *argv, const char *optstring, const fz_getopt_long_options *longopts)
{
int c;
const char *place;
fz_optarg = NULL;
fz_optlong = NULL;
fz_optitem = -1;
while (!scan || *scan == '\0')
{
if (fz_optind == 0)
fz_optind++;
if (fz_optind >= argc || argv[fz_optind][0] != '-' || argv[fz_optind][1] == '\0')
return EOF;
if (argv[fz_optind][1] == '-' && argv[fz_optind][2] == '\0') {
fz_optind++;
return EOF;
}
if (argv[fz_optind][1] == '-')
{
scan = NULL;
return match_long_option(argc, argv, longopts, &argv[fz_optind][2]);
}
scan = argv[fz_optind]+1;
fz_optind++;
}
c = *scan++;
place = strchr(optstring, c);
if (!place || c == ':') {
fprintf(stderr, "%s: unknown option -%c\n", argv[0], c);
return '?';
}
place++;
if (*place == ':') {
if (*scan != '\0') {
fz_optarg = scan;
scan = NULL;
} else if( fz_optind < argc ) {
fz_optarg = argv[fz_optind];
fz_optind++;
} else {
fprintf(stderr, "%s: option requires argument -%c\n", argv[0], c);
return ':';
}
}
return c;
}
int
fz_getopt(int argc, char *const *argv, const char *optstring)
{
return fz_getopt_long(argc, argv, optstring, NULL);
}
int
fz_opt_from_list(char *opt, const char *optlist)
{
int n = 0;
while (*optlist)
{
const char *optend = optlist;
if (*optend == '*')
{
fz_optarg = opt;
return n;
}
while (*optend != 0 && *optend != '|' && *optend != ':')
optend++;
if (fz_strncasecmp(optlist, opt, optend-optlist))
{
/* We didn't match. Carry on. */
}
else if (opt[optend-optlist] == 0)
{
/* We matched, ending in NUL */
fz_optarg = NULL;
return n;
}
else if (*optend == ':' && opt[optend-optlist] == ':')
{
/* We matched, and we both have some arguments and expected some. */
fz_optarg = &opt[optend-optlist+1];
return n;
}
n++;
if (*optend == ':')
{
optend++;
if (*optend == '|')
optend++;
else if (*optend != 0)
{
fprintf(stderr, "Malformed options string");
return -1;
}
}
if (*optend == '|')
optend++;
optlist = optend;
}
fprintf(stderr, "Unrecognised option argument: %s\n", opt);
return -1;
}
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