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