Bohan Li | df1c606 | 2020-12-21 13:24:25 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020, Alliance for Open Media. All rights reserved |
| 3 | * |
| 4 | * This source code is subject to the terms of the BSD 2 Clause License and |
| 5 | * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| 6 | * was not distributed with this source code in the LICENSE file, you can |
| 7 | * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| 8 | * Media Patent License 1.0 was not distributed with this source code in the |
| 9 | * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| 10 | */ |
| 11 | #include "common/args_helper.h" |
| 12 | |
| 13 | #include <assert.h> |
| 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <string.h> |
| 17 | #include <limits.h> |
| 18 | |
| 19 | #define SET_ERR_STRING(...) \ |
| 20 | if (err_msg) snprintf(err_msg, ARG_ERR_MSG_MAX_LEN, __VA_ARGS__) |
| 21 | |
| 22 | struct arg arg_init(char **argv) { |
| 23 | struct arg a; |
| 24 | |
| 25 | a.argv = argv; |
| 26 | a.argv_step = 1; |
| 27 | a.name = NULL; |
| 28 | a.val = NULL; |
| 29 | a.def = NULL; |
| 30 | return a; |
| 31 | } |
| 32 | |
| 33 | int arg_match_helper(struct arg *arg_, const struct arg_def *def, char **argv, |
| 34 | char *err_msg) { |
| 35 | struct arg arg; |
| 36 | |
| 37 | if (err_msg) err_msg[0] = '\0'; |
| 38 | |
| 39 | assert(def->has_val == 0 || def->has_val == 1 || def->has_val == -1); |
| 40 | |
| 41 | if (!argv[0] || argv[0][0] != '-') return 0; |
| 42 | |
| 43 | arg = arg_init(argv); |
| 44 | |
| 45 | if (def->short_name && !strcmp(arg.argv[0] + 1, def->short_name)) { |
| 46 | arg.name = arg.argv[0] + 1; |
| 47 | arg.val = def->has_val ? arg.argv[1] : NULL; |
| 48 | arg.argv_step = def->has_val ? 2 : 1; |
| 49 | } else if (def->long_name) { |
| 50 | const size_t name_len = strlen(def->long_name); |
| 51 | |
| 52 | if (arg.argv[0][1] == '-' && |
| 53 | !strncmp(arg.argv[0] + 2, def->long_name, name_len) && |
| 54 | (arg.argv[0][name_len + 2] == '=' || |
| 55 | arg.argv[0][name_len + 2] == '\0')) { |
| 56 | arg.name = arg.argv[0] + 2; |
| 57 | arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL; |
| 58 | arg.argv_step = 1; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | if (arg.name) { |
| 63 | if (def->has_val == -1) { |
| 64 | arg.def = def; |
| 65 | *arg_ = arg; |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | if (!arg.val && def->has_val) { |
| 70 | SET_ERR_STRING("Error: option %s requires argument.\n", arg.name); |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | if (arg.val && !def->has_val) { |
| 75 | SET_ERR_STRING("Error: option %s requires no argument.\n", arg.name); |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | arg.def = def; |
| 80 | *arg_ = arg; |
| 81 | return 1; |
| 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | unsigned int arg_parse_uint_helper(const struct arg *arg, char *err_msg) { |
| 88 | char *endptr; |
| 89 | const unsigned long rawval = strtoul(arg->val, &endptr, 10); // NOLINT |
| 90 | |
| 91 | if (err_msg) err_msg[0] = '\0'; |
| 92 | |
| 93 | if (arg->val[0] != '\0' && endptr[0] == '\0') { |
| 94 | if (rawval <= UINT_MAX) return (unsigned int)rawval; |
| 95 | SET_ERR_STRING("Option %s: Value %lu out of range for unsigned int\n", |
| 96 | arg->name, rawval); |
| 97 | return 0; |
| 98 | } |
| 99 | SET_ERR_STRING("Option %s: Invalid character '%c'\n", arg->name, *endptr); |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | int arg_parse_int_helper(const struct arg *arg, char *err_msg) { |
| 104 | char *endptr; |
| 105 | const long rawval = strtol(arg->val, &endptr, 10); // NOLINT |
| 106 | |
| 107 | if (err_msg) err_msg[0] = '\0'; |
| 108 | |
| 109 | if (arg->val[0] != '\0' && endptr[0] == '\0') { |
| 110 | if (rawval >= INT_MIN && rawval <= INT_MAX) return (int)rawval; |
| 111 | SET_ERR_STRING("Option %s: Value %ld out of range for signed int\n", |
| 112 | arg->name, rawval); |
| 113 | return 0; |
| 114 | } |
| 115 | SET_ERR_STRING("Option %s: Invalid character '%c'\n", arg->name, *endptr); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | struct aom_rational arg_parse_rational_helper(const struct arg *arg, |
| 120 | char *err_msg) { |
| 121 | long rawval; // NOLINT |
| 122 | char *endptr; |
| 123 | struct aom_rational rat = { 0, 1 }; |
| 124 | |
| 125 | if (err_msg) err_msg[0] = '\0'; |
| 126 | |
| 127 | /* parse numerator */ |
| 128 | rawval = strtol(arg->val, &endptr, 10); |
| 129 | |
| 130 | if (arg->val[0] != '\0' && endptr[0] == '/') { |
| 131 | if (rawval >= INT_MIN && rawval <= INT_MAX) { |
| 132 | rat.num = (int)rawval; |
| 133 | } else { |
| 134 | SET_ERR_STRING("Option %s: Value %ld out of range for signed int\n", |
| 135 | arg->name, rawval); |
| 136 | return rat; |
| 137 | } |
| 138 | } else { |
| 139 | SET_ERR_STRING("Option %s: Expected / at '%c'\n", arg->name, *endptr); |
| 140 | return rat; |
| 141 | } |
| 142 | |
| 143 | /* parse denominator */ |
| 144 | rawval = strtol(endptr + 1, &endptr, 10); |
| 145 | |
| 146 | if (arg->val[0] != '\0' && endptr[0] == '\0') { |
| 147 | if (rawval >= INT_MIN && rawval <= INT_MAX) { |
| 148 | rat.den = (int)rawval; |
| 149 | } else { |
| 150 | SET_ERR_STRING("Option %s: Value %ld out of range for signed int\n", |
| 151 | arg->name, rawval); |
| 152 | return rat; |
| 153 | } |
| 154 | } else { |
| 155 | SET_ERR_STRING("Option %s: Invalid character '%c'\n", arg->name, *endptr); |
| 156 | return rat; |
| 157 | } |
| 158 | |
| 159 | return rat; |
| 160 | } |
| 161 | |
| 162 | int arg_parse_enum_helper(const struct arg *arg, char *err_msg) { |
| 163 | const struct arg_enum_list *listptr; |
| 164 | long rawval; // NOLINT |
| 165 | char *endptr; |
| 166 | |
| 167 | if (err_msg) err_msg[0] = '\0'; |
| 168 | |
| 169 | /* First see if the value can be parsed as a raw value */ |
| 170 | rawval = strtol(arg->val, &endptr, 10); |
| 171 | if (arg->val[0] != '\0' && endptr[0] == '\0') { |
| 172 | /* Got a raw value, make sure it's valid */ |
| 173 | for (listptr = arg->def->enums; listptr->name; listptr++) |
| 174 | if (listptr->val == rawval) return (int)rawval; |
| 175 | } |
| 176 | |
| 177 | /* Next see if it can be parsed as a string */ |
| 178 | for (listptr = arg->def->enums; listptr->name; listptr++) |
| 179 | if (!strcmp(arg->val, listptr->name)) return listptr->val; |
| 180 | |
| 181 | SET_ERR_STRING("Option %s: Invalid value '%s'\n", arg->name, arg->val); |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | int arg_parse_enum_or_int_helper(const struct arg *arg, char *err_msg) { |
| 186 | if (arg->def->enums) return arg_parse_enum_helper(arg, err_msg); |
| 187 | return arg_parse_int_helper(arg, err_msg); |
| 188 | } |
| 189 | |
| 190 | // parse a comma separated list of at most n integers |
| 191 | // return the number of elements in the list |
| 192 | int arg_parse_list_helper(const struct arg *arg, int *list, int n, |
| 193 | char *err_msg) { |
| 194 | const char *ptr = arg->val; |
| 195 | char *endptr; |
| 196 | int i = 0; |
| 197 | |
| 198 | if (err_msg) err_msg[0] = '\0'; |
| 199 | |
| 200 | while (ptr[0] != '\0') { |
| 201 | long rawval = strtol(ptr, &endptr, 10); // NOLINT |
| 202 | if (rawval < INT_MIN || rawval > INT_MAX) { |
| 203 | SET_ERR_STRING("Option %s: Value %ld out of range for signed int\n", |
| 204 | arg->name, rawval); |
| 205 | return 0; |
| 206 | } else if (i >= n) { |
| 207 | SET_ERR_STRING("Option %s: List has more than %d entries\n", arg->name, |
| 208 | n); |
| 209 | return 0; |
| 210 | } else if (*endptr == ',') { |
| 211 | endptr++; |
| 212 | } else if (*endptr != '\0') { |
| 213 | SET_ERR_STRING("Option %s: Bad list separator '%c'\n", arg->name, |
| 214 | *endptr); |
| 215 | return 0; |
| 216 | } |
| 217 | list[i++] = (int)rawval; |
| 218 | ptr = endptr; |
| 219 | } |
| 220 | return i; |
| 221 | } |