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bin-refactor: Add parse_options generic method

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This commit is contained in:
Xavier Mendez 2014-10-20 00:10:31 +02:00
parent c8ae964a56
commit 5368b35153
1 changed files with 69 additions and 7 deletions
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76
bin/common.h
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@ -11,7 +11,8 @@
#define count_of(arr) (sizeof(arr)/sizeof(0[arr])) #define count_of(arr) (sizeof(arr)/sizeof(0[arr]))
int int
parseint(const char *string, long *result) { parseint(const char *string, long *result)
{
char *end; char *end;
errno = 0; errno = 0;
*result = strtol(string, &end, 10); *result = strtol(string, &end, 10);
@ -19,7 +20,8 @@ parseint(const char *string, long *result) {
} }
const char * const char *
strprefix(const char *str, const char *prefix) { strprefix(const char *str, const char *prefix)
{
while (*prefix) { while (*prefix) {
if (!(*str && *str == *prefix)) return 0; if (!(*str && *str == *prefix)) return 0;
prefix++; str++; prefix++; str++;
@ -28,7 +30,8 @@ strprefix(const char *str, const char *prefix) {
} }
void void
print_option(char short_opt, const char *long_opt, const char *description) { print_option(char short_opt, const char *long_opt, const char *description)
{
if (short_opt) if (short_opt)
printf(" -%c, ", short_opt); printf(" -%c, ", short_opt);
else else
@ -38,8 +41,67 @@ print_option(char short_opt, const char *long_opt, const char *description) {
} }
void void
print_version() { print_version()
int major, minor, revision; {
hoedown_version(&major, &minor, &revision); printf("Built with Hoedown " HOEDOWN_VERSION ".\n");
printf("Built with Hoedown v%d.%d.%d.\n", major, minor, revision); }
int
parse_options(
int argc, char **argv,
int(*parse_short_option)(char opt, char *next, void *opaque),
int(*parse_long_option)(char *opt, char *next, void *opaque),
int(*parse_argument)(int argn, char *arg, int is_forced, void *opaque),
void *opaque)
{
int result;
int i = 1, regular_args = 0;
/* Parse options mixed with arguments */
while (i < argc) {
char *arg = argv[i];
if (arg[0] == '-' && arg[1]) {
char *next_arg = (i+1 < argc) ? argv[i+1] : NULL;
if (arg[1] == '-' && !arg[2]) {
/* '--' signals end of options */
i++;
break;
}
if (arg[1] == '-') {
/* Long option */
result = parse_long_option(arg + 2, next_arg, opaque);
if (!result) return 0;
i += result;
} else {
/* Sequence of short options */
size_t pos;
for (pos = 1; arg[pos]; pos++) {
char *next = (arg[pos+1]) ? arg + pos+1 : next_arg;
result = parse_short_option(arg[pos], next, opaque);
if (!result) return 0;
if (result == 2) {
i++;
break;
}
}
i++;
}
} else {
/* Argument */
result = parse_argument(regular_args++, arg, 0, opaque);
if (!result) return 0;
i++;
}
}
/* Parse rest as forced arguments */
while (i < argc) {
parse_argument(regular_args++, argv[i], 1, opaque);
i++;
}
return 1;
} }