1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12#include <stdlib.h>
13#include <string.h>
14#include <limits.h>
15#include "args.h"
16
17#ifdef _MSC_VER
18#define snprintf _snprintf
19#endif
20
21#if defined(__GNUC__) && __GNUC__
22extern void die(const char *fmt, ...) __attribute__((noreturn));
23#else
24extern void die(const char *fmt, ...);
25#endif
26
27
28struct arg arg_init(char **argv) {
29  struct arg a;
30
31  a.argv      = argv;
32  a.argv_step = 1;
33  a.name      = NULL;
34  a.val       = NULL;
35  a.def       = NULL;
36  return a;
37}
38
39int arg_match(struct arg *arg_, const struct arg_def *def, char **argv) {
40  struct arg arg;
41
42  if (!argv[0] || argv[0][0] != '-')
43    return 0;
44
45  arg = arg_init(argv);
46
47  if (def->short_name
48      && strlen(arg.argv[0]) == strlen(def->short_name) + 1
49      && !strcmp(arg.argv[0] + 1, def->short_name)) {
50
51    arg.name = arg.argv[0] + 1;
52    arg.val = def->has_val ? arg.argv[1] : NULL;
53    arg.argv_step = def->has_val ? 2 : 1;
54  } else if (def->long_name) {
55    const size_t name_len = strlen(def->long_name);
56
57    if (strlen(arg.argv[0]) >= name_len + 2
58        && arg.argv[0][1] == '-'
59        && !strncmp(arg.argv[0] + 2, def->long_name, name_len)
60        && (arg.argv[0][name_len + 2] == '='
61            || arg.argv[0][name_len + 2] == '\0')) {
62
63      arg.name = arg.argv[0] + 2;
64      arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL;
65      arg.argv_step = 1;
66    }
67  }
68
69  if (arg.name && !arg.val && def->has_val)
70    die("Error: option %s requires argument.\n", arg.name);
71
72  if (arg.name && arg.val && !def->has_val)
73    die("Error: option %s requires no argument.\n", arg.name);
74
75  if (arg.name
76      && (arg.val || !def->has_val)) {
77    arg.def = def;
78    *arg_ = arg;
79    return 1;
80  }
81
82  return 0;
83}
84
85
86const char *arg_next(struct arg *arg) {
87  if (arg->argv[0])
88    arg->argv += arg->argv_step;
89
90  return *arg->argv;
91}
92
93
94char **argv_dup(int argc, const char **argv) {
95  char **new_argv = malloc((argc + 1) * sizeof(*argv));
96
97  memcpy(new_argv, argv, argc * sizeof(*argv));
98  new_argv[argc] = NULL;
99  return new_argv;
100}
101
102
103void arg_show_usage(FILE *fp, const struct arg_def *const *defs) {
104  char option_text[40] = {0};
105
106  for (; *defs; defs++) {
107    const struct arg_def *def = *defs;
108    char *short_val = def->has_val ? " <arg>" : "";
109    char *long_val = def->has_val ? "=<arg>" : "";
110
111    if (def->short_name && def->long_name) {
112      char *comma = def->has_val ? "," : ",      ";
113
114      snprintf(option_text, 37, "-%s%s%s --%s%6s",
115               def->short_name, short_val, comma,
116               def->long_name, long_val);
117    } else if (def->short_name)
118      snprintf(option_text, 37, "-%s%s",
119               def->short_name, short_val);
120    else if (def->long_name)
121      snprintf(option_text, 37, "          --%s%s",
122               def->long_name, long_val);
123
124    fprintf(fp, "  %-37s\t%s\n", option_text, def->desc);
125
126    if (def->enums) {
127      const struct arg_enum_list *listptr;
128
129      fprintf(fp, "  %-37s\t  ", "");
130
131      for (listptr = def->enums; listptr->name; listptr++)
132        fprintf(fp, "%s%s", listptr->name,
133                listptr[1].name ? ", " : "\n");
134    }
135  }
136}
137
138
139unsigned int arg_parse_uint(const struct arg *arg) {
140  long int   rawval;
141  char      *endptr;
142
143  rawval = strtol(arg->val, &endptr, 10);
144
145  if (arg->val[0] != '\0' && endptr[0] == '\0') {
146    if (rawval >= 0 && rawval <= UINT_MAX)
147      return rawval;
148
149    die("Option %s: Value %ld out of range for unsigned int\n",
150        arg->name, rawval);
151  }
152
153  die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
154  return 0;
155}
156
157
158int arg_parse_int(const struct arg *arg) {
159  long int   rawval;
160  char      *endptr;
161
162  rawval = strtol(arg->val, &endptr, 10);
163
164  if (arg->val[0] != '\0' && endptr[0] == '\0') {
165    if (rawval >= INT_MIN && rawval <= INT_MAX)
166      return rawval;
167
168    die("Option %s: Value %ld out of range for signed int\n",
169        arg->name, rawval);
170  }
171
172  die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
173  return 0;
174}
175
176
177struct vpx_rational {
178  int num; /**< fraction numerator */
179  int den; /**< fraction denominator */
180};
181struct vpx_rational arg_parse_rational(const struct arg *arg) {
182  long int             rawval;
183  char                *endptr;
184  struct vpx_rational  rat;
185
186  /* parse numerator */
187  rawval = strtol(arg->val, &endptr, 10);
188
189  if (arg->val[0] != '\0' && endptr[0] == '/') {
190    if (rawval >= INT_MIN && rawval <= INT_MAX)
191      rat.num = rawval;
192    else die("Option %s: Value %ld out of range for signed int\n",
193               arg->name, rawval);
194  } else die("Option %s: Expected / at '%c'\n", arg->name, *endptr);
195
196  /* parse denominator */
197  rawval = strtol(endptr + 1, &endptr, 10);
198
199  if (arg->val[0] != '\0' && endptr[0] == '\0') {
200    if (rawval >= INT_MIN && rawval <= INT_MAX)
201      rat.den = rawval;
202    else die("Option %s: Value %ld out of range for signed int\n",
203               arg->name, rawval);
204  } else die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
205
206  return rat;
207}
208
209
210int arg_parse_enum(const struct arg *arg) {
211  const struct arg_enum_list *listptr;
212  long int                    rawval;
213  char                       *endptr;
214
215  /* First see if the value can be parsed as a raw value */
216  rawval = strtol(arg->val, &endptr, 10);
217  if (arg->val[0] != '\0' && endptr[0] == '\0') {
218    /* Got a raw value, make sure it's valid */
219    for (listptr = arg->def->enums; listptr->name; listptr++)
220      if (listptr->val == rawval)
221        return rawval;
222  }
223
224  /* Next see if it can be parsed as a string */
225  for (listptr = arg->def->enums; listptr->name; listptr++)
226    if (!strcmp(arg->val, listptr->name))
227      return listptr->val;
228
229  die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
230  return 0;
231}
232
233
234int arg_parse_enum_or_int(const struct arg *arg) {
235  if (arg->def->enums)
236    return arg_parse_enum(arg);
237  return arg_parse_int(arg);
238}
239