hevc: Add names for reserved NAL unit types
[libav.git] / libavutil / avstring.c
1 /*
2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3 * Copyright (c) 2007 Mans Rullgard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <stdarg.h>
23 #include <stdint.h>
24 #include <stdio.h>
25 #include <string.h>
26
27 #include "config.h"
28 #include "common.h"
29 #include "mem.h"
30 #include "avstring.h"
31
32 int av_strstart(const char *str, const char *pfx, const char **ptr)
33 {
34 while (*pfx && *pfx == *str) {
35 pfx++;
36 str++;
37 }
38 if (!*pfx && ptr)
39 *ptr = str;
40 return !*pfx;
41 }
42
43 int av_stristart(const char *str, const char *pfx, const char **ptr)
44 {
45 while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
46 pfx++;
47 str++;
48 }
49 if (!*pfx && ptr)
50 *ptr = str;
51 return !*pfx;
52 }
53
54 char *av_stristr(const char *s1, const char *s2)
55 {
56 if (!*s2)
57 return s1;
58
59 do
60 if (av_stristart(s1, s2, NULL))
61 return s1;
62 while (*s1++);
63
64 return NULL;
65 }
66
67 char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
68 {
69 size_t needle_len = strlen(needle);
70 if (!needle_len)
71 return haystack;
72 while (hay_length >= needle_len) {
73 hay_length--;
74 if (!memcmp(haystack, needle, needle_len))
75 return haystack;
76 haystack++;
77 }
78 return NULL;
79 }
80
81 size_t av_strlcpy(char *dst, const char *src, size_t size)
82 {
83 size_t len = 0;
84 while (++len < size && *src)
85 *dst++ = *src++;
86 if (len <= size)
87 *dst = 0;
88 return len + strlen(src) - 1;
89 }
90
91 size_t av_strlcat(char *dst, const char *src, size_t size)
92 {
93 size_t len = strlen(dst);
94 if (size <= len + 1)
95 return len + strlen(src);
96 return len + av_strlcpy(dst + len, src, size - len);
97 }
98
99 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
100 {
101 int len = strlen(dst);
102 va_list vl;
103
104 va_start(vl, fmt);
105 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
106 va_end(vl);
107
108 return len;
109 }
110
111 char *av_d2str(double d)
112 {
113 char *str = av_malloc(16);
114 if (str)
115 snprintf(str, 16, "%f", d);
116 return str;
117 }
118
119 #define WHITESPACES " \n\t"
120
121 char *av_get_token(const char **buf, const char *term)
122 {
123 char *out = av_malloc(strlen(*buf) + 1);
124 char *ret = out, *end = out;
125 const char *p = *buf;
126 if (!out)
127 return NULL;
128 p += strspn(p, WHITESPACES);
129
130 while (*p && !strspn(p, term)) {
131 char c = *p++;
132 if (c == '\\' && *p) {
133 *out++ = *p++;
134 end = out;
135 } else if (c == '\'') {
136 while (*p && *p != '\'')
137 *out++ = *p++;
138 if (*p) {
139 p++;
140 end = out;
141 }
142 } else {
143 *out++ = c;
144 }
145 }
146
147 do
148 *out-- = 0;
149 while (out >= end && strspn(out, WHITESPACES));
150
151 *buf = p;
152
153 return ret;
154 }
155
156 int av_strcasecmp(const char *a, const char *b)
157 {
158 uint8_t c1, c2;
159 do {
160 c1 = av_tolower(*a++);
161 c2 = av_tolower(*b++);
162 } while (c1 && c1 == c2);
163 return c1 - c2;
164 }
165
166 int av_strncasecmp(const char *a, const char *b, size_t n)
167 {
168 const char *end = a + n;
169 uint8_t c1, c2;
170 do {
171 c1 = av_tolower(*a++);
172 c2 = av_tolower(*b++);
173 } while (a < end && c1 && c1 == c2);
174 return c1 - c2;
175 }
176
177 const char *av_basename(const char *path)
178 {
179 char *p = strrchr(path, '/');
180
181 #if HAVE_DOS_PATHS
182 char *q = strrchr(path, '\\');
183 char *d = strchr(path, ':');
184
185 p = FFMAX3(p, q, d);
186 #endif
187
188 if (!p)
189 return path;
190
191 return p + 1;
192 }
193
194 const char *av_dirname(char *path)
195 {
196 char *p = strrchr(path, '/');
197
198 #if HAVE_DOS_PATHS
199 char *q = strrchr(path, '\\');
200 char *d = strchr(path, ':');
201
202 d = d ? d + 1 : d;
203
204 p = FFMAX3(p, q, d);
205 #endif
206
207 if (!p)
208 return ".";
209
210 *p = '\0';
211
212 return path;
213 }
214
215 int av_match_name(const char *name, const char *names)
216 {
217 const char *p;
218 int len, namelen;
219
220 if (!name || !names)
221 return 0;
222
223 namelen = strlen(name);
224 while ((p = strchr(names, ','))) {
225 len = FFMAX(p - names, namelen);
226 if (!av_strncasecmp(name, names, len))
227 return 1;
228 names = p + 1;
229 }
230 return !av_strcasecmp(name, names);
231 }