/*
* getopt.c - my re-implementation of getopt.
* Copyright 1997, 2000, 2001, 2002, 2006, Benjamin Sittler
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "getopt.h"
int optind=1, opterr=1, optopt=0;
char *optarg=0;
/* reset argument parser to start-up values */
/*
int getopt_reset(void)
{
optind = 1;
opterr = 1;
optopt = 0;
optarg = 0;
return 0;
}
*/
/* this is the plain old UNIX getopt, with GNU-style extensions. */
/* if you're porting some piece of UNIX software, this is all you need. */
/* this supports GNU-style permution and optional arguments */
int my_getopt(int argc, char *argvc[], const char *opts)
{
char **argv = (char**)argvc;
static int charind=0;
const char *s;
char mode, colon_mode;
int off = 0, opt = -1;
if(getenv("POSIXLY_CORRECT")) colon_mode = mode = '+';
else {
if((colon_mode = *opts) == ':') off ++;
if(((mode = opts[off]) == '+') || (mode == '-')) {
off++;
if((colon_mode != ':') && ((colon_mode = opts[off]) == ':'))
off ++;
}
}
optarg = 0;
if(charind) {
optopt = argv[optind][charind];
for(s=opts+off; *s; s++) if(optopt == *s) {
charind++;
if((*(++s) == ':') || ((optopt == 'W') && (*s == ';'))) {
if(argv[optind][charind]) {
optarg = &(argv[optind++][charind]);
charind = 0;
} else if(*(++s) != ':') {
charind = 0;
if(++optind >= argc) {
if(opterr) fprintf(stderr,
"%s: option requires an argument -- %c\n",
argv[0], optopt);
opt = (colon_mode == ':') ? ':' : '?';
goto getopt_ok;
}
optarg = argv[optind++];
}
}
opt = optopt;
goto getopt_ok;
}
if(opterr) fprintf(stderr,
"%s: illegal option -- %c\n",
argv[0], optopt);
opt = '?';
if(argv[optind][++charind] == '\0') {
optind++;
charind = 0;
}
getopt_ok:
if(charind && ! argv[optind][charind]) {
optind++;
charind = 0;
}
} else if((optind >= argc) ||
((argv[optind][0] == '-') &&
(argv[optind][1] == '-') &&
(argv[optind][2] == '\0'))) {
optind++;
opt = -1;
} else if((argv[optind][0] != '-') ||
(argv[optind][1] == '\0')) {
char *tmp;
int i, j, k;
if(mode == '+') opt = -1;
else if(mode == '-') {
optarg = argv[optind++];
charind = 0;
opt = 1;
} else {
for(i=j=optind; i<argc; i++) if((argv[i][0] == '-') &&
(argv[i][1] != '\0')) {
optind=i;
opt=my_getopt(argc, argv, opts);
while(i > j) {
tmp=argv[--i];
for(k=i; k+1<optind; k++) argv[k]=argv[k+1];
argv[--optind]=tmp;
}
break;
}
if(i == argc) opt = -1;
}
} else {
charind++;
opt = my_getopt(argc, argv, opts);
}
if (optind > argc) optind = argc;
return opt;
}
/* this is the extended getopt_long{,_only}, with some GNU-like
* extensions. Implements _getopt_internal in case any programs
* expecting GNU libc getopt call it.
*/
static int _getopt_internal(int argc, char * argv[], const char *shortopts,
const struct option *longopts, int *longind,
int long_only)
{
char mode, colon_mode = *shortopts;
int shortoff = 0, opt = -1;
if(getenv("POSIXLY_CORRECT")) colon_mode = mode = '+';
else {
if((colon_mode = *shortopts) == ':') shortoff ++;
if(((mode = shortopts[shortoff]) == '+') || (mode == '-')) {
shortoff++;
if((colon_mode != ':') && ((colon_mode = shortopts[shortoff]) == ':'))
shortoff ++;
}
}
optarg = 0;
if((optind >= argc) ||
((argv[optind][0] == '-') &&
(argv[optind][1] == '-') &&
(argv[optind][2] == '\0'))) {
optind++;
opt = -1;
} else if((argv[optind][0] != '-') ||
(argv[optind][1] == '\0')) {
char *tmp;
int i, j, k;
opt = -1;
if(mode == '+') return -1;
else if(mode == '-') {
optarg = argv[optind++];
return 1;
}
for(i=j=optind; i<argc; i++) if((argv[i][0] == '-') &&
(argv[i][1] != '\0')) {
optind=i;
opt=_getopt_internal(argc, argv, shortopts,
longopts, longind,
long_only);
while(i > j) {
tmp=argv[--i];
for(k=i; k+1<optind; k++)
argv[k]=argv[k+1];
argv[--optind]=tmp;
}
break;
}
} else if((!long_only) && (argv[optind][1] != '-'))
opt = my_getopt(argc, argv, shortopts);
else {
int charind, offset;
int found = 0, ind, hits = 0;
if(((optopt = argv[optind][1]) != '-') && ! argv[optind][2]) {
int c;
ind = shortoff;
while((c = shortopts[ind++])) {
if(((shortopts[ind] == ':') ||
((c == 'W') && (shortopts[ind] == ';'))) &&
(shortopts[++ind] == ':'))
ind ++;
if(optopt == c) return my_getopt(argc, argv, shortopts);
}
}
offset = 2 - (argv[optind][1] != '-');
for(charind = offset;
(argv[optind][charind] != '\0') &&
(argv[optind][charind] != '=');
charind++);
for(ind = 0; longopts[ind].name && !hits; ind++)
if((strlen(longopts[ind].name) == (size_t) (charind - offset)) &&
(strncmp(longopts[ind].name,
argv[optind] + offset, charind - offset) == 0))
found = ind, hits++;
if(!hits) for(ind = 0; longopts[ind].name; ind++)
if(strncmp(longopts[ind].name,
argv[optind] + offset, charind - offset) == 0)
found = ind, hits++;
if(hits == 1) {
opt = 0;
if(argv[optind][charind] == '=') {
if(longopts[found].has_arg == 0) {
opt = '?';
if(opterr) fprintf(stderr,
"%s: option `--%s' doesn't allow an argument\n",
argv[0], longopts[found].name);
} else {
optarg = argv[optind] + ++charind;
charind = 0;
}
} else if(longopts[found].has_arg == 1) {
if(++optind >= argc) {
opt = (colon_mode == ':') ? ':' : '?';
if(opterr) fprintf(stderr,
"%s: option `--%s' requires an argument\n",
argv[0], longopts[found].name);
} else optarg = argv[optind];
}
if(!opt) {
if (longind) *longind = found;
if(!longopts[found].flag) opt = longopts[found].val;
else *(longopts[found].flag) = longopts[found].val;
}
optind++;
} else if(!hits) {
if(offset == 1) opt = my_getopt(argc, argv, shortopts);
else {
opt = '?';
if(opterr) fprintf(stderr,
"%s: unrecognized option `%s'\n",
argv[0], argv[optind++]);
}
} else {
opt = '?';
if(opterr) fprintf(stderr,
"%s: option `%s' is ambiguous\n",
argv[0], argv[optind++]);
}
}
if (optind > argc) optind = argc;
return opt;
}
int my_getopt_long(int argc, char * argv[], const char *shortopts,
const struct option *longopts, int *longind)
{
return _getopt_internal(argc, argv, shortopts, longopts, longind, 0);
}
int my_getopt_long_only(int argc, char * argv[], const char *shortopts,
const struct option *longopts, int *longind)
{
return _getopt_internal(argc, argv, shortopts, longopts, longind, 1);
}