diff options
Diffstat (limited to 'args.c')
| -rw-r--r-- | args.c | 215 |
1 files changed, 215 insertions, 0 deletions
@@ -0,0 +1,215 @@ +/* + * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license and patent + * grant that can be found in the LICENSE file in the root of the source + * tree. 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) + { + int 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) + snprintf(option_text, 37, "-%s%s, --%s%s", + def->short_name, short_val, + 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); + } +} + + +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; +} |