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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "php_getopt.h"

#define OPTERRCOLON (1)
#define OPTERRNF (2)
#define OPTERRARG (3)

static int php_opt_error(int argc, char * const *argv, int oint, int optchr, int err, int show_err) /* {{{ */
{
if (show_err)
{
fprintf(stderr, "Error in argument %d, char %d: ", oint, optchr+1);
switch(err)
{
case OPTERRCOLON:
fprintf(stderr, ": in flags\n");
break;
case OPTERRNF:
fprintf(stderr, "option not found %c\n", argv[oint][optchr]);
break;
case OPTERRARG:
fprintf(stderr, "no argument for option %c\n", argv[oint][optchr]);
break;
default:
fprintf(stderr, "unknown\n");
break;
}
}
return('?');
}
/* }}} */

PHPAPI int php_optidx = -1;

PHPAPI int php_getopt(int argc, char* const *argv, const opt_struct opts[], char **optarg, int *optind, int show_err, int arg_start) /* {{{ */
{
static int optchr = 0;
static int dash = 0; /* have already seen the - */

php_optidx = -1;

if (*optind >= argc) {
return(EOF);
}
if (!dash) {
if ((argv[*optind][0] != '-')) {
return(EOF);
} else {
if (!argv[*optind][1])
{
/*
* use to specify stdin. Need to let pgm process this and
* the following args
*/
return(EOF);
}
}
}
if ((argv[*optind][0] == '-') && (argv[*optind][1] == '-')) {
char *pos;
int arg_end = strlen(argv[*optind])-1;

/* '--' indicates end of args if not followed by a known long option name */
if (argv[*optind][2] == '\0') {
(*optind)++;
return(EOF);
}

arg_start = 2;

/* Check for <arg>=<val> */
if ((pos = php_memnstr(&argv[*optind][arg_start], "=", 1, argv[*optind]+arg_end)) != NULL) {
arg_end = pos-&argv[*optind][arg_start];
arg_start++;
} else {
arg_end--;
}

while (1) {
php_optidx++;
if (opts[php_optidx].opt_char == '-') {
(*optind)++;
return(php_opt_error(argc, argv, *optind-1, optchr, OPTERRARG, show_err));
} else if (opts[php_optidx].opt_name && !strncmp(&argv[*optind][2], opts[php_optidx].opt_name, arg_end) && arg_end == strlen(opts[php_optidx].opt_name)) {
break;
}
}

optchr = 0;
dash = 0;
arg_start += strlen(opts[php_optidx].opt_name);
} else {
if (!dash) {
dash = 1;
optchr = 1;
}
/* Check if the guy tries to do a -: kind of flag */
if (argv[*optind][optchr] == ':') {
dash = 0;
(*optind)++;
return (php_opt_error(argc, argv, *optind-1, optchr, OPTERRCOLON, show_err));
}
arg_start = 1 + optchr;
}
if (php_optidx < 0) {
while (1) {
php_optidx++;
if (opts[php_optidx].opt_char == '-') {
int errind = *optind;
int errchr = optchr;

if (!argv[*optind][optchr+1]) {
dash = 0;
(*optind)++;
} else {
optchr++;
arg_start++;
}
return(php_opt_error(argc, argv, errind, errchr, OPTERRNF, show_err));
} else if (argv[*optind][optchr] == opts[php_optidx].opt_char) {
break;
}
}
}
if (opts[php_optidx].need_param) {
/* Check for cases where the value of the argument
is in the form -<arg> <val>, -<arg>=<varl> or -<arg><val> */
dash = 0;
if (!argv[*optind][arg_start]) {
(*optind)++;
if (*optind == argc) {
/* Was the value required or is it optional? */
if (opts[php_optidx].need_param == 1) {
return(php_opt_error(argc, argv, *optind-1, optchr, OPTERRARG, show_err));
}
/* Optional value is not supported with -<arg> <val> style */
} else if (opts[php_optidx].need_param == 1) {
*optarg = argv[(*optind)++];
  }
} else if (argv[*optind][arg_start] == '=') {
arg_start++;
*optarg = &argv[*optind][arg_start];
(*optind)++;
} else {
*optarg = &argv[*optind][arg_start];
(*optind)++;
}
return opts[php_optidx].opt_char;
} else {
/* multiple options specified as one (exclude long opts) */
if (arg_start >= 2 && !((argv[*optind][0] == '-') && (argv[*optind][1] == '-'))) {
if (!argv[*optind][optchr+1])
{
dash = 0;
(*optind)++;
} else {
optchr++;
}
} else {
(*optind)++;
}
return opts[php_optidx].opt_char;
}
assert(0);
return(0); /* never reached */
}
/* }}} */

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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