ref: 94fbfb9f1b2ff105b8e8bf053c1493bb1f24629f
dir: /args.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "args.h"
#ifdef _MSC_VER
#define snprintf _snprintf
#endif
#if defined(__GNUC__) && __GNUC__
extern void die(const char *fmt, ...) __attribute__((noreturn));
#else
extern void die(const char *fmt, ...);
#endif
struct arg arg_init(char **argv) {
struct arg a;
a.argv = argv;
a.argv_step = 1;
a.name = NULL;
a.val = NULL;
a.def = NULL;
return a;
}
int arg_match(struct arg *arg_, const struct arg_def *def, char **argv) {
struct arg arg;
if (!argv[0] || argv[0][0] != '-')
return 0;
arg = arg_init(argv);
if (def->short_name
&& strlen(arg.argv[0]) == strlen(def->short_name) + 1
&& !strcmp(arg.argv[0] + 1, def->short_name)) {
arg.name = arg.argv[0] + 1;
arg.val = def->has_val ? arg.argv[1] : NULL;
arg.argv_step = def->has_val ? 2 : 1;
} else if (def->long_name) {
const size_t name_len = strlen(def->long_name);
if (strlen(arg.argv[0]) >= name_len + 2
&& arg.argv[0][1] == '-'
&& !strncmp(arg.argv[0] + 2, def->long_name, name_len)
&& (arg.argv[0][name_len + 2] == '='
|| arg.argv[0][name_len + 2] == '\0')) {
arg.name = arg.argv[0] + 2;
arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL;
arg.argv_step = 1;
}
}
if (arg.name && !arg.val && def->has_val)
die("Error: option %s requires argument.\n", arg.name);
if (arg.name && arg.val && !def->has_val)
die("Error: option %s requires no argument.\n", arg.name);
if (arg.name
&& (arg.val || !def->has_val)) {
arg.def = def;
*arg_ = arg;
return 1;
}
return 0;
}
const char *arg_next(struct arg *arg) {
if (arg->argv[0])
arg->argv += arg->argv_step;
return *arg->argv;
}
char **argv_dup(int argc, const char **argv) {
char **new_argv = malloc((argc + 1) * sizeof(*argv));
memcpy(new_argv, argv, argc * sizeof(*argv));
new_argv[argc] = NULL;
return new_argv;
}
void arg_show_usage(FILE *fp, const struct arg_def *const *defs) {
char option_text[40] = {0};
for (; *defs; defs++) {
const struct arg_def *def = *defs;
char *short_val = def->has_val ? " <arg>" : "";
char *long_val = def->has_val ? "=<arg>" : "";
if (def->short_name && def->long_name) {
char *comma = def->has_val ? "," : ", ";
snprintf(option_text, 37, "-%s%s%s --%s%6s",
def->short_name, short_val, comma,
def->long_name, long_val);
} else if (def->short_name)
snprintf(option_text, 37, "-%s%s",
def->short_name, short_val);
else if (def->long_name)
snprintf(option_text, 37, " --%s%s",
def->long_name, long_val);
fprintf(fp, " %-37s\t%s\n", option_text, def->desc);
if (def->enums) {
const struct arg_enum_list *listptr;
fprintf(fp, " %-37s\t ", "");
for (listptr = def->enums; listptr->name; listptr++)
fprintf(fp, "%s%s", listptr->name,
listptr[1].name ? ", " : "\n");
}
}
}
unsigned int arg_parse_uint(const struct arg *arg) {
long int rawval;
char *endptr;
rawval = strtol(arg->val, &endptr, 10);
if (arg->val[0] != '\0' && endptr[0] == '\0') {
if (rawval >= 0 && rawval <= UINT_MAX)
return rawval;
die("Option %s: Value %ld out of range for unsigned int\n",
arg->name, rawval);
}
die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
return 0;
}
int arg_parse_int(const struct arg *arg) {
long int rawval;
char *endptr;
rawval = strtol(arg->val, &endptr, 10);
if (arg->val[0] != '\0' && endptr[0] == '\0') {
if (rawval >= INT_MIN && rawval <= INT_MAX)
return rawval;
die("Option %s: Value %ld out of range for signed int\n",
arg->name, rawval);
}
die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
return 0;
}
struct vpx_rational {
int num; /**< fraction numerator */
int den; /**< fraction denominator */
};
struct vpx_rational arg_parse_rational(const struct arg *arg) {
long int rawval;
char *endptr;
struct vpx_rational rat;
/* parse numerator */
rawval = strtol(arg->val, &endptr, 10);
if (arg->val[0] != '\0' && endptr[0] == '/') {
if (rawval >= INT_MIN && rawval <= INT_MAX)
rat.num = rawval;
else die("Option %s: Value %ld out of range for signed int\n",
arg->name, rawval);
} else die("Option %s: Expected / at '%c'\n", arg->name, *endptr);
/* parse denominator */
rawval = strtol(endptr + 1, &endptr, 10);
if (arg->val[0] != '\0' && endptr[0] == '\0') {
if (rawval >= INT_MIN && rawval <= INT_MAX)
rat.den = rawval;
else die("Option %s: Value %ld out of range for signed int\n",
arg->name, rawval);
} else die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
return rat;
}
int arg_parse_enum(const struct arg *arg) {
const struct arg_enum_list *listptr;
long int rawval;
char *endptr;
/* First see if the value can be parsed as a raw value */
rawval = strtol(arg->val, &endptr, 10);
if (arg->val[0] != '\0' && endptr[0] == '\0') {
/* Got a raw value, make sure it's valid */
for (listptr = arg->def->enums; listptr->name; listptr++)
if (listptr->val == rawval)
return rawval;
}
/* Next see if it can be parsed as a string */
for (listptr = arg->def->enums; listptr->name; listptr++)
if (!strcmp(arg->val, listptr->name))
return listptr->val;
die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
return 0;
}
int arg_parse_enum_or_int(const struct arg *arg) {
if (arg->def->enums)
return arg_parse_enum(arg);
return arg_parse_int(arg);
}