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Diffstat (limited to 'media/libvpx/libvpx/args.c')
| -rw-r--r-- | media/libvpx/libvpx/args.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/args.c b/media/libvpx/libvpx/args.c new file mode 100644 index 0000000000..4afb9c021a --- /dev/null +++ b/media/libvpx/libvpx/args.c @@ -0,0 +1,218 @@ +/* + * 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" + +#include "vpx/vpx_integer.h" +#include "vpx_ports/msvc.h" + +#if defined(__GNUC__) +__attribute__((noreturn)) extern void die(const char *fmt, ...); +#elif defined(_MSC_VER) +__declspec(noreturn) extern void die(const char *fmt, ...); +#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)); + if (!new_argv) return NULL; + + 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) { + uint32_t rawval; + char *endptr; + + rawval = (uint32_t)strtoul(arg->val, &endptr, 10); + + if (arg->val[0] != '\0' && endptr[0] == '\0') { + if (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) { + int32_t rawval; + char *endptr; + + rawval = (int32_t)strtol(arg->val, &endptr, 10); + + if (arg->val[0] != '\0' && endptr[0] == '\0') { + if (rawval >= INT_MIN && rawval <= INT_MAX) return (int)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 = (int)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 = (int)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 (int)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); +} |