1/*
2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3 * Copyright (c) 2007 Mans Rullgard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 <stdio.h>
24#include <string.h>
25#include <ctype.h>
26#include "avstring.h"
27#include "mem.h"
28
29int av_strstart(const char *str, const char *pfx, const char **ptr)
30{
31    while (*pfx && *pfx == *str) {
32        pfx++;
33        str++;
34    }
35    if (!*pfx && ptr)
36        *ptr = str;
37    return !*pfx;
38}
39
40int av_stristart(const char *str, const char *pfx, const char **ptr)
41{
42    while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) {
43        pfx++;
44        str++;
45    }
46    if (!*pfx && ptr)
47        *ptr = str;
48    return !*pfx;
49}
50
51char *av_stristr(const char *s1, const char *s2)
52{
53    if (!*s2)
54        return s1;
55
56    do {
57        if (av_stristart(s1, s2, NULL))
58            return s1;
59    } while (*s1++);
60
61    return NULL;
62}
63
64size_t av_strlcpy(char *dst, const char *src, size_t size)
65{
66    size_t len = 0;
67    while (++len < size && *src)
68        *dst++ = *src++;
69    if (len <= size)
70        *dst = 0;
71    return len + strlen(src) - 1;
72}
73
74size_t av_strlcat(char *dst, const char *src, size_t size)
75{
76    size_t len = strlen(dst);
77    if (size <= len + 1)
78        return len + strlen(src);
79    return len + av_strlcpy(dst + len, src, size - len);
80}
81
82size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
83{
84    int len = strlen(dst);
85    va_list vl;
86
87    va_start(vl, fmt);
88    len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
89    va_end(vl);
90
91    return len;
92}
93
94char *av_d2str(double d)
95{
96    char *str= av_malloc(16);
97    if(str) snprintf(str, 16, "%f", d);
98    return str;
99}
100