ref: bc40b13f33de2e3cf8942659c35a84d8d65b8401
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" #include "vpx/vpx_integer.h" #include "vpx_ports/msvc.h" #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) { 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); }