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#include <getopt.h>
#include "abrtlib.h"
#include "parse_options.h"
#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP 2
void parse_usage_and_die(const char *usage, const struct options *opt)
{
fprintf(stderr, _("Usage: %s\n"), usage);
if (opt->type != OPTION_GROUP)
fputc('\n', stderr);
for (; opt->type != OPTION_END; opt++)
{
size_t pos;
int pad;
if (opt->type == OPTION_GROUP)
{
fputc('\n', stderr);
if (*opt->help)
fprintf(stderr, "%s\n", opt->help);
continue;
}
pos = fprintf(stderr, " ");
if (opt->short_name)
pos += fprintf(stderr, "-%c", opt->short_name);
if (opt->short_name && opt->long_name)
pos += fprintf(stderr, ", ");
if (opt->long_name)
pos += fprintf(stderr, "--%s", opt->long_name);
if (opt->argh)
{
const char *fmt = " %s";
if (opt->type == OPTION_OPTSTRING)
fmt = "[%s]";
pos += fprintf(stderr, fmt, opt->argh);
}
if (pos <= USAGE_OPTS_WIDTH)
pad = USAGE_OPTS_WIDTH - pos;
else
{
fputc('\n', stderr);
pad = USAGE_OPTS_WIDTH;
}
fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opt->help);
}
fputc('\n', stderr);
exit(1);
}
static int parse_opt_size(const struct options *opt)
{
unsigned size = 0;
for (; opt->type != OPTION_END; opt++)
size++;
return size;
}
unsigned parse_opts(int argc, char **argv, const struct options *opt,
const char *usage)
{
int help = 0;
int size = parse_opt_size(opt);
struct strbuf *shortopts = strbuf_new();
struct option *longopts = xzalloc(sizeof(longopts[0]) * (size+2));
struct option *curopt = longopts;
int ii;
for (ii = 0; ii < size; ++ii)
{
curopt->name = opt[ii].long_name;
/*curopt->flag = 0; - xzalloc did it */
curopt->val = opt[ii].short_name;
switch (opt[ii].type)
{
case OPTION_BOOL:
curopt->has_arg = no_argument;
if (opt[ii].short_name)
strbuf_append_char(shortopts, opt[ii].short_name);
break;
case OPTION_INTEGER:
case OPTION_STRING:
curopt->has_arg = required_argument;
if (opt[ii].short_name)
strbuf_append_strf(shortopts, "%c:", opt[ii].short_name);
break;
case OPTION_OPTSTRING:
curopt->has_arg = optional_argument;
if (opt[ii].short_name)
strbuf_append_strf(shortopts, "%c::", opt[ii].short_name);
break;
case OPTION_GROUP:
case OPTION_END:
break;
}
//log("curopt[%d].name:'%s' .has_arg:%d .flag:%p .val:%d", (int)(curopt-longopts),
// curopt->name, curopt->has_arg, curopt->flag, curopt->val);
/*
* getopt_long() thinks that NULL name marks the end of longopts.
* Example:
* [0] name:'verbose' val:'v'
* [1] name:NULL val:'c'
* [2] name:'force' val:'f'
* ... ... ...
* In this case, --force won't be accepted!
* Therefore we can only advance if name is not NULL.
*/
if (curopt->name)
curopt++;
}
curopt->name = "help";
curopt->has_arg = no_argument;
curopt->flag = &help;
curopt->val = 1;
/* xzalloc did it already:
curopt++;
curopt->name = NULL;
curopt->has_arg = 0;
curopt->flag = NULL;
curopt->val = 0;
*/
unsigned retval = 0;
while (1)
{
int c = getopt_long(argc, argv, shortopts->buf, longopts, NULL);
if (c == -1)
break;
if (c == '?' || help)
{
free(longopts);
strbuf_free(shortopts);
parse_usage_and_die(usage, opt);
}
for (ii = 0; ii < size; ++ii)
{
if (opt[ii].short_name == c)
{
if (ii < sizeof(retval)*8)
retval |= (1 << ii);
if (opt[ii].value != NULL) switch (opt[ii].type)
{
case OPTION_BOOL:
*(int*)opt[ii].value += 1;
break;
case OPTION_INTEGER:
*(int*)opt[ii].value = xatoi(optarg);
break;
case OPTION_STRING:
case OPTION_OPTSTRING:
if (optarg)
*(char**)opt[ii].value = (char*)optarg;
break;
case OPTION_GROUP:
case OPTION_END:
break;
}
}
}
}
free(longopts);
strbuf_free(shortopts);
return retval;
}
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