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{
30    struct arg a;
31
32    a.argv      = argv;
33    a.argv_step = 1;
34    a.name      = NULL;
35    a.val       = NULL;
36    a.def       = NULL;
37    return a;
38}
39
40int arg_match(struct arg *arg_, const struct arg_def *def, char **argv)
41{
42    struct arg arg;
43
44    if (!argv[0] || argv[0][0] != '-')
45        return 0;
46
47    arg = arg_init(argv);
48
49    if (def->short_name
50        && strlen(arg.argv[0]) == strlen(def->short_name) + 1
51        && !strcmp(arg.argv[0] + 1, def->short_name))
52    {
53
54        arg.name = arg.argv[0] + 1;
55        arg.val = def->has_val ? arg.argv[1] : NULL;
56        arg.argv_step = def->has_val ? 2 : 1;
57    }
58    else if (def->long_name)
59    {
60        int name_len = strlen(def->long_name);
61
62        if (strlen(arg.argv[0]) >= name_len + 2
63            && arg.argv[0][1] == '-'
64            && !strncmp(arg.argv[0] + 2, def->long_name, name_len)
65            && (arg.argv[0][name_len+2] == '='
66                || arg.argv[0][name_len+2] == '\0'))
67        {
68
69            arg.name = arg.argv[0] + 2;
70            arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL;
71            arg.argv_step = 1;
72        }
73    }
74
75    if (arg.name && !arg.val && def->has_val)
76        die("Error: option %s requires argument.\n", arg.name);
77
78    if (arg.name && arg.val && !def->has_val)
79        die("Error: option %s requires no argument.\n", arg.name);
80
81    if (arg.name
82        && (arg.val || !def->has_val))
83    {
84        arg.def = def;
85        *arg_ = arg;
86        return 1;
87    }
88
89    return 0;
90}
91
92
93const char *arg_next(struct arg *arg)
94{
95    if (arg->argv[0])
96        arg->argv += arg->argv_step;
97
98    return *arg->argv;
99}
100
101
102char **argv_dup(int argc, const char **argv)
103{
104    char **new_argv = malloc((argc + 1) * sizeof(*argv));
105
106    memcpy(new_argv, argv, argc * sizeof(*argv));
107    new_argv[argc] = NULL;
108    return new_argv;
109}
110
111
112void arg_show_usage(FILE *fp, const struct arg_def *const *defs)
113{
114    char option_text[40] = {0};
115
116    for (; *defs; defs++)
117    {
118        const struct arg_def *def = *defs;
119        char *short_val = def->has_val ? " <arg>" : "";
120        char *long_val = def->has_val ? "=<arg>" : "";
121
122        if (def->short_name && def->long_name)
123        {
124            char *comma = def->has_val ? "," : ",      ";
125
126            snprintf(option_text, 37, "-%s%s%s --%s%6s",
127                     def->short_name, short_val, comma,
128                     def->long_name, long_val);
129        }
130        else if (def->short_name)
131            snprintf(option_text, 37, "-%s%s",
132                     def->short_name, short_val);
133        else if (def->long_name)
134            snprintf(option_text, 37, "          --%s%s",
135                     def->long_name, long_val);
136
137        fprintf(fp, "  %-37s\t%s\n", option_text, def->desc);
138
139        if(def->enums)
140        {
141            const struct arg_enum_list *listptr;
142
143            fprintf(fp, "  %-37s\t  ", "");
144
145            for(listptr = def->enums; listptr->name; listptr++)
146                fprintf(fp, "%s%s", listptr->name,
147                        listptr[1].name ? ", " : "\n");
148        }
149    }
150}
151
152
153unsigned int arg_parse_uint(const struct arg *arg)
154{
155    long int   rawval;
156    char      *endptr;
157
158    rawval = strtol(arg->val, &endptr, 10);
159
160    if (arg->val[0] != '\0' && endptr[0] == '\0')
161    {
162        if (rawval >= 0 && rawval <= UINT_MAX)
163            return rawval;
164
165        die("Option %s: Value %ld out of range for unsigned int\n",
166            arg->name, rawval);
167    }
168
169    die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
170    return 0;
171}
172
173
174int arg_parse_int(const struct arg *arg)
175{
176    long int   rawval;
177    char      *endptr;
178
179    rawval = strtol(arg->val, &endptr, 10);
180
181    if (arg->val[0] != '\0' && endptr[0] == '\0')
182    {
183        if (rawval >= INT_MIN && rawval <= INT_MAX)
184            return rawval;
185
186        die("Option %s: Value %ld out of range for signed int\n",
187            arg->name, rawval);
188    }
189
190    die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
191    return 0;
192}
193
194
195struct vpx_rational
196{
197    int num; /**< fraction numerator */
198    int den; /**< fraction denominator */
199};
200struct vpx_rational arg_parse_rational(const struct arg *arg)
201{
202    long int             rawval;
203    char                *endptr;
204    struct vpx_rational  rat;
205
206    /* parse numerator */
207    rawval = strtol(arg->val, &endptr, 10);
208
209    if (arg->val[0] != '\0' && endptr[0] == '/')
210    {
211        if (rawval >= INT_MIN && rawval <= INT_MAX)
212            rat.num = rawval;
213        else die("Option %s: Value %ld out of range for signed int\n",
214                     arg->name, rawval);
215    }
216    else die("Option %s: Expected / at '%c'\n", arg->name, *endptr);
217
218    /* parse denominator */
219    rawval = strtol(endptr + 1, &endptr, 10);
220
221    if (arg->val[0] != '\0' && endptr[0] == '\0')
222    {
223        if (rawval >= INT_MIN && rawval <= INT_MAX)
224            rat.den = rawval;
225        else die("Option %s: Value %ld out of range for signed int\n",
226                     arg->name, rawval);
227    }
228    else die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
229
230    return rat;
231}
232
233
234int arg_parse_enum(const struct arg *arg)
235{
236    const struct arg_enum_list *listptr;
237    long int                    rawval;
238    char                       *endptr;
239
240    /* First see if the value can be parsed as a raw value */
241    rawval = strtol(arg->val, &endptr, 10);
242    if (arg->val[0] != '\0' && endptr[0] == '\0')
243    {
244        /* Got a raw value, make sure it's valid */
245        for(listptr = arg->def->enums; listptr->name; listptr++)
246            if(listptr->val == rawval)
247                return rawval;
248    }
249
250    /* Next see if it can be parsed as a string */
251    for(listptr = arg->def->enums; listptr->name; listptr++)
252        if(!strcmp(arg->val, listptr->name))
253            return listptr->val;
254
255    die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
256    return 0;
257}
258
259
260int arg_parse_enum_or_int(const struct arg *arg)
261{
262    if(arg->def->enums)
263        return arg_parse_enum(arg);
264    return arg_parse_int(arg);
265}
266