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Support long-style options (fake GLib)

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This commit is contained in:
Evan Miller 2020-08-03 23:58:33 -04:00
parent 255b38d7fd
commit f9a0234cf4
1 changed files with 43 additions and 24 deletions
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67
src/libmdb/fakeglib.c
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@ -6,7 +6,7 @@
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
/* string functions */
@ -309,48 +309,67 @@ gboolean g_option_context_parse(GOptionContext *context,
len++;
}
}
struct option *long_opts = calloc(count+1, sizeof(struct option));
char *short_opts = calloc(1, len+1);
for (i=0; i<len; i++) {
GOptionArg arg = context->entries[i].arg;
short_opts[i] = context->entries[i].short_name;
int j=0;
for (i=0; i<count; i++) {
const GOptionEntry *entry = &context->entries[i];
GOptionArg arg = entry->arg;
short_opts[j++] = entry->short_name;
if (arg == G_OPTION_ARG_STRING || arg == G_OPTION_ARG_INT) {
short_opts[++i] = ':';
short_opts[j++] = ':';
}
long_opts[i].name = entry->long_name;
long_opts[i].has_arg = entry->arg == G_OPTION_ARG_NONE ? no_argument : required_argument;
}
int c;
int longindex = 0;
opterr = 0;
while ((c = getopt(*argc, *argv, short_opts)) != -1) {
while ((c = getopt_long(*argc, *argv, short_opts, long_opts, &longindex)) != -1) {
if (c == '?') {
*error = malloc(sizeof(GError));
(*error)->message = malloc(100);
snprintf((*error)->message, 100, "Unrecognized option: %c", optopt);
if (optopt) {
snprintf((*error)->message, 100, "Unrecognized option: -%c", optopt);
} else {
snprintf((*error)->message, 100, "Unrecognized option: %s", (*argv)[optind-1]);
}
free(short_opts);
free(long_opts);
return FALSE;
}
for (i=0; i<count; i++) {
if (context->entries[i].short_name == c) {
GOptionArg arg = context->entries[i].arg;
if (arg == G_OPTION_ARG_NONE) {
*(int *)context->entries[i].arg_data = !(context->entries[i].flags & G_OPTION_FLAG_REVERSE);
} else if (arg == G_OPTION_ARG_INT) {
char *endptr = NULL;
*(int *)context->entries[i].arg_data = strtol(optarg, &endptr, 10);
if (*endptr) {
*error = malloc(sizeof(GError));
(*error)->message = malloc(100);
snprintf((*error)->message, 100, "Argument to -%c must be an integer", c);
free(short_opts);
return FALSE;
}
} else if (arg == G_OPTION_ARG_STRING) {
*(char **)context->entries[i].arg_data = strdup(optarg);
const GOptionEntry *entry = NULL;
if (c == 0) {
entry = &context->entries[longindex];
} else {
for (i=0; i<count; i++) {
if (context->entries[i].short_name == c) {
entry = &context->entries[i];
break;
}
}
}
if (entry->arg == G_OPTION_ARG_NONE) {
*(int *)entry->arg_data = !(entry->flags & G_OPTION_FLAG_REVERSE);
} else if (entry->arg == G_OPTION_ARG_INT) {
char *endptr = NULL;
*(int *)entry->arg_data = strtol(optarg, &endptr, 10);
if (*endptr) {
*error = malloc(sizeof(GError));
(*error)->message = malloc(100);
snprintf((*error)->message, 100, "Argument to --%s must be an integer", entry->long_name);
free(short_opts);
free(long_opts);
return FALSE;
}
} else if (entry->arg == G_OPTION_ARG_STRING) {
*(char **)entry->arg_data = strdup(optarg);
}
}
*argc -= (optind - 1);
*argv += (optind - 1);
free(short_opts);
free(long_opts);
return TRUE;
}