1 /*
2 * Copyright (c) 2016, 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
12 #include "common/args.h"
13
14 #include <stdlib.h>
15 #include <string.h>
16 #include <limits.h>
17
18 #include "aom/aom_integer.h"
19 #include "aom_ports/msvc.h"
20
21 #if defined(__GNUC__) && __GNUC__
22 extern void die(const char *fmt, ...) __attribute__((noreturn));
23 #else
24 extern void die(const char *fmt, ...);
25 #endif
26
arg_init(char ** argv)27 struct arg arg_init(char **argv) {
28 struct arg a;
29
30 a.argv = argv;
31 a.argv_step = 1;
32 a.name = NULL;
33 a.val = NULL;
34 a.def = NULL;
35 return a;
36 }
37
ignore_front_spaces(const char * str)38 char *ignore_front_spaces(const char *str) {
39 while (str[0] == ' ' || str[0] == '\t') ++str;
40 return (char *)str;
41 }
42
ignore_end_spaces(char * str)43 void ignore_end_spaces(char *str) {
44 char *end = str + strlen(str);
45 while (end > str && (end[0] == ' ' || end[0] == '\t' || end[0] == '\n' ||
46 end[0] == '\r' || end[0] == '\0'))
47 --end;
48 if (end >= str) end[1] = '\0';
49 }
50
arg_cfg(int * argc,char *** argv,const char * file)51 int arg_cfg(int *argc, char ***argv, const char *file) {
52 char **argv_local = (char **)*argv;
53 char **argv_org = (char **)*argv;
54 char line[1024 * 10];
55 FILE *f = fopen(file, "r");
56 if (!f) return 1;
57
58 while (fgets(line, sizeof(line) - 1, f)) {
59 char *actual_line = ignore_front_spaces(line);
60 char *left, *right, *comment;
61 size_t length = strlen(actual_line);
62
63 if (length == 0 || actual_line[0] == '#') continue;
64 right = strchr(actual_line, ':');
65 if (right == NULL) continue;
66 right[0] = '\0';
67
68 left = ignore_front_spaces(actual_line);
69 right = ignore_front_spaces(right + 1);
70
71 comment = strchr(right, '#');
72 if (comment != NULL) comment[0] = '\0';
73
74 ignore_end_spaces(left);
75 ignore_end_spaces(right);
76
77 char **new_args = argv_dup(*argc, (const char **)argv_local);
78 char *new_line = (char *)malloc(sizeof(*new_line) * 128);
79
80 if (argv_local != argv_org) free(argv_local);
81
82 if (!strcmp(right, "ON"))
83 snprintf(new_line, sizeof(*new_line) * 128, "--%s", left);
84 else
85 snprintf(new_line, sizeof(*new_line) * 128, "--%s=%s", left, right);
86
87 new_args[(*argc) - 1] = new_args[(*argc) - 2];
88 new_args[(*argc) - 2] = new_line;
89 argv_local = new_args;
90 *argv = new_args;
91 (*argc)++;
92 }
93 fclose(f);
94 return 0;
95 }
96
arg_match(struct arg * arg_,const struct arg_def * def,char ** argv)97 int arg_match(struct arg *arg_, const struct arg_def *def, char **argv) {
98 struct arg arg;
99
100 if (!argv[0] || argv[0][0] != '-') return 0;
101
102 arg = arg_init(argv);
103
104 if (def->short_name && strlen(arg.argv[0]) == strlen(def->short_name) + 1 &&
105 !strcmp(arg.argv[0] + 1, def->short_name)) {
106 arg.name = arg.argv[0] + 1;
107 arg.val = def->has_val ? arg.argv[1] : NULL;
108 arg.argv_step = def->has_val ? 2 : 1;
109 } else if (def->long_name) {
110 const size_t name_len = strlen(def->long_name);
111
112 if (strlen(arg.argv[0]) >= name_len + 2 && arg.argv[0][1] == '-' &&
113 !strncmp(arg.argv[0] + 2, def->long_name, name_len) &&
114 (arg.argv[0][name_len + 2] == '=' ||
115 arg.argv[0][name_len + 2] == '\0')) {
116 arg.name = arg.argv[0] + 2;
117 arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL;
118 arg.argv_step = 1;
119 }
120 }
121
122 if (arg.name && !arg.val && def->has_val)
123 die("Error: option %s requires argument.\n", arg.name);
124
125 if (arg.name && arg.val && !def->has_val)
126 die("Error: option %s requires no argument.\n", arg.name);
127
128 if (arg.name && (arg.val || !def->has_val)) {
129 arg.def = def;
130 *arg_ = arg;
131 return 1;
132 }
133
134 return 0;
135 }
136
arg_next(struct arg * arg)137 const char *arg_next(struct arg *arg) {
138 if (arg->argv[0]) arg->argv += arg->argv_step;
139
140 return *arg->argv;
141 }
142
argv_dup(int argc,const char ** argv)143 char **argv_dup(int argc, const char **argv) {
144 char **new_argv = malloc((argc + 1) * sizeof(*argv));
145
146 memcpy(new_argv, argv, argc * sizeof(*argv));
147 new_argv[argc] = NULL;
148 return new_argv;
149 }
150
arg_show_usage(FILE * fp,const struct arg_def * const * defs)151 void arg_show_usage(FILE *fp, const struct arg_def *const *defs) {
152 char option_text[40] = { 0 };
153
154 for (; *defs; defs++) {
155 const struct arg_def *def = *defs;
156 char *short_val = def->has_val ? " <arg>" : "";
157 char *long_val = def->has_val ? "=<arg>" : "";
158
159 if (def->short_name && def->long_name) {
160 char *comma = def->has_val ? "," : ", ";
161
162 snprintf(option_text, 37, "-%s%s%s --%s%6s", def->short_name, short_val,
163 comma, def->long_name, long_val);
164 } else if (def->short_name)
165 snprintf(option_text, 37, "-%s%s", def->short_name, short_val);
166 else if (def->long_name)
167 snprintf(option_text, 37, " --%s%s", def->long_name, long_val);
168
169 fprintf(fp, " %-37s\t%s\n", option_text, def->desc);
170
171 if (def->enums) {
172 const struct arg_enum_list *listptr;
173
174 fprintf(fp, " %-37s\t ", "");
175
176 for (listptr = def->enums; listptr->name; listptr++)
177 fprintf(fp, "%s%s", listptr->name, listptr[1].name ? ", " : "\n");
178 }
179 }
180 }
181
arg_parse_uint(const struct arg * arg)182 unsigned int arg_parse_uint(const struct arg *arg) {
183 char *endptr;
184 const unsigned long rawval = strtoul(arg->val, &endptr, 10); // NOLINT
185
186 if (arg->val[0] != '\0' && endptr[0] == '\0') {
187 if (rawval <= UINT_MAX) return (unsigned int)rawval;
188
189 die("Option %s: Value %lu out of range for unsigned int\n", arg->name,
190 rawval);
191 }
192
193 die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
194 return 0;
195 }
196
arg_parse_int(const struct arg * arg)197 int arg_parse_int(const struct arg *arg) {
198 char *endptr;
199 const long rawval = strtol(arg->val, &endptr, 10); // NOLINT
200
201 if (arg->val[0] != '\0' && endptr[0] == '\0') {
202 if (rawval >= INT_MIN && rawval <= INT_MAX) return (int)rawval;
203
204 die("Option %s: Value %ld out of range for signed int\n", arg->name,
205 rawval);
206 }
207
208 die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
209 return 0;
210 }
211
212 struct aom_rational {
213 int num; /**< fraction numerator */
214 int den; /**< fraction denominator */
215 };
arg_parse_rational(const struct arg * arg)216 struct aom_rational arg_parse_rational(const struct arg *arg) {
217 long int rawval;
218 char *endptr;
219 struct aom_rational rat;
220
221 /* parse numerator */
222 rawval = strtol(arg->val, &endptr, 10);
223
224 if (arg->val[0] != '\0' && endptr[0] == '/') {
225 if (rawval >= INT_MIN && rawval <= INT_MAX)
226 rat.num = (int)rawval;
227 else
228 die("Option %s: Value %ld out of range for signed int\n", arg->name,
229 rawval);
230 } else
231 die("Option %s: Expected / at '%c'\n", arg->name, *endptr);
232
233 /* parse denominator */
234 rawval = strtol(endptr + 1, &endptr, 10);
235
236 if (arg->val[0] != '\0' && endptr[0] == '\0') {
237 if (rawval >= INT_MIN && rawval <= INT_MAX)
238 rat.den = (int)rawval;
239 else
240 die("Option %s: Value %ld out of range for signed int\n", arg->name,
241 rawval);
242 } else
243 die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
244
245 return rat;
246 }
247
arg_parse_enum(const struct arg * arg)248 int arg_parse_enum(const struct arg *arg) {
249 const struct arg_enum_list *listptr;
250 long int rawval;
251 char *endptr;
252
253 /* First see if the value can be parsed as a raw value */
254 rawval = strtol(arg->val, &endptr, 10);
255 if (arg->val[0] != '\0' && endptr[0] == '\0') {
256 /* Got a raw value, make sure it's valid */
257 for (listptr = arg->def->enums; listptr->name; listptr++)
258 if (listptr->val == rawval) return (int)rawval;
259 }
260
261 /* Next see if it can be parsed as a string */
262 for (listptr = arg->def->enums; listptr->name; listptr++)
263 if (!strcmp(arg->val, listptr->name)) return listptr->val;
264
265 die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
266 return 0;
267 }
268
arg_parse_enum_or_int(const struct arg * arg)269 int arg_parse_enum_or_int(const struct arg *arg) {
270 if (arg->def->enums) return arg_parse_enum(arg);
271 return arg_parse_int(arg);
272 }
273
274 // parse a comma separated list of at most n integers
275 // return the number of elements in the list
arg_parse_list(const struct arg * arg,int * list,int n)276 int arg_parse_list(const struct arg *arg, int *list, int n) {
277 const char *ptr = arg->val;
278 char *endptr;
279 int i = 0;
280
281 while (ptr[0] != '\0') {
282 int32_t rawval = (int32_t)strtol(ptr, &endptr, 10);
283 if (rawval < INT_MIN || rawval > INT_MAX) {
284 die("Option %s: Value %ld out of range for signed int\n", arg->name,
285 rawval);
286 } else if (i >= n) {
287 die("Option %s: List has more than %d entries\n", arg->name, n);
288 } else if (*endptr == ',') {
289 endptr++;
290 } else if (*endptr != '\0') {
291 die("Option %s: Bad list separator '%c'\n", arg->name, *endptr);
292 }
293 list[i++] = (int)rawval;
294 ptr = endptr;
295 }
296 return i;
297 }
298