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/*
* libmowgli: A collection of useful routines for programming.
* program_opts.h: Replacement for GNU getopt().
*
* Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "mowgli.h"
#include "ext/getopt_long.h"
void
mowgli_program_opts_consumer_str(const char *arg, void *userdata)
{
return_if_fail(arg != NULL);
return_if_fail(userdata != NULL);
*(char **) userdata = mowgli_strdup(arg);
}
void
mowgli_program_opts_consumer_int(const char *arg, void *userdata)
{
return_if_fail(arg != NULL);
return_if_fail(userdata != NULL);
*(int *) userdata = atoi(arg);
}
void
mowgli_program_opts_consumer_bool(const char *arg, void *userdata)
{
return_if_fail(arg != NULL);
return_if_fail(userdata != NULL);
*(bool *) userdata = true;
}
static inline mowgli_getopt_option_t *
mowgli_program_opts_convert(const mowgli_program_opts_t *opts, size_t opts_size)
{
mowgli_getopt_option_t *g_opts;
size_t i;
return_val_if_fail(opts != NULL, NULL);
g_opts = mowgli_alloc_array(sizeof(mowgli_getopt_option_t), opts_size);
for (i = 0; i < opts_size; i++)
{
if (opts[i].longopt == NULL)
continue;
g_opts[i].name = opts[i].longopt;
g_opts[i].iflag = i;
if (opts[i].has_param)
g_opts[i].has_arg = 1;
}
return g_opts;
}
static inline const char *
mowgli_program_opts_compute_optstr(const mowgli_program_opts_t *opts, size_t opts_size)
{
static char buf[256];
char *p = buf;
size_t i;
return_val_if_fail(opts != NULL, NULL);
memset(buf, '\0', sizeof buf);
for (i = 0; i < opts_size; i++)
{
if (!opts[i].smallopt)
continue;
*p++ = opts[i].smallopt;
if (opts[i].has_param)
*p++ = ':';
}
*p = '\0';
return buf;
}
static inline void
mowgli_program_opts_dispatch(const mowgli_program_opts_t *opt, const char *optarg)
{
return_if_fail(opt != NULL);
if (opt->has_param && (optarg == NULL))
{
fprintf(stderr, "no optarg for option %s", opt->longopt);
return;
}
opt->consumer(optarg, opt->userdata);
}
void
mowgli_program_opts_parse(const mowgli_program_opts_t *opts, size_t opts_size, int *argc, char ***argv)
{
mowgli_getopt_option_t *g_opts;
const char *shortops;
int c;
size_t i;
int opt_index;
return_if_fail(opts != NULL);
return_if_fail(opts_size > 0);
return_if_fail(argc != NULL);
return_if_fail(argv != NULL);
g_opts = mowgli_program_opts_convert(opts, opts_size);
shortops = mowgli_program_opts_compute_optstr(opts, opts_size);
for (;;)
{
const mowgli_program_opts_t *opt = NULL;
c = mowgli_getopt_long(*argc, *argv, shortops, g_opts, &opt_index);
if (c == -1)
break;
switch (c)
{
case 0:
/* long-option was provided, resolve it. */
opt = &opts[g_opts[opt_index].iflag];
break;
default:
for (i = 0; i < opts_size; i++)
if (opts[i].smallopt == c)
{
opt = &opts[i];
break;
}
break;
}
mowgli_program_opts_dispatch(opt, mowgli_optarg);
}
mowgli_free(g_opts);
}
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