This source file includes following definitions.
- av_strstart
- av_stristart
- av_stristr
- av_strnstr
- av_strlcpy
- av_strlcat
- av_strlcatf
- av_asprintf
- av_d2str
- av_get_token
- av_strtok
- av_strcasecmp
- av_strncasecmp
- av_basename
- av_dirname
- av_escape
- av_isdigit
- av_isgraph
- av_isspace
- av_isxdigit
- av_match_name
- av_utf8_decode
- av_match_list
- main
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "config.h"
#include "common.h"
#include "mem.h"
#include "avassert.h"
#include "avstring.h"
#include "bprint.h"
int av_strstart(const char *str, const char *pfx, const char **ptr)
{
while (*pfx && *pfx == *str) {
pfx++;
str++;
}
if (!*pfx && ptr)
*ptr = str;
return !*pfx;
}
int av_stristart(const char *str, const char *pfx, const char **ptr)
{
while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
pfx++;
str++;
}
if (!*pfx && ptr)
*ptr = str;
return !*pfx;
}
char *av_stristr(const char *s1, const char *s2)
{
if (!*s2)
return (char*)(intptr_t)s1;
do
if (av_stristart(s1, s2, NULL))
return (char*)(intptr_t)s1;
while (*s1++);
return NULL;
}
char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
{
size_t needle_len = strlen(needle);
if (!needle_len)
return (char*)haystack;
while (hay_length >= needle_len) {
hay_length--;
if (!memcmp(haystack, needle, needle_len))
return (char*)haystack;
haystack++;
}
return NULL;
}
size_t av_strlcpy(char *dst, const char *src, size_t size)
{
size_t len = 0;
while (++len < size && *src)
*dst++ = *src++;
if (len <= size)
*dst = 0;
return len + strlen(src) - 1;
}
size_t av_strlcat(char *dst, const char *src, size_t size)
{
size_t len = strlen(dst);
if (size <= len + 1)
return len + strlen(src);
return len + av_strlcpy(dst + len, src, size - len);
}
size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
{
int len = strlen(dst);
va_list vl;
va_start(vl, fmt);
len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
va_end(vl);
return len;
}
char *av_asprintf(const char *fmt, ...)
{
char *p = NULL;
va_list va;
int len;
va_start(va, fmt);
len = vsnprintf(NULL, 0, fmt, va);
va_end(va);
if (len < 0)
goto end;
p = av_malloc(len + 1);
if (!p)
goto end;
va_start(va, fmt);
len = vsnprintf(p, len + 1, fmt, va);
va_end(va);
if (len < 0)
av_freep(&p);
end:
return p;
}
char *av_d2str(double d)
{
char *str = av_malloc(16);
if (str)
snprintf(str, 16, "%f", d);
return str;
}
#define WHITESPACES " \n\t"
char *av_get_token(const char **buf, const char *term)
{
char *out = av_malloc(strlen(*buf) + 1);
char *ret = out, *end = out;
const char *p = *buf;
if (!out)
return NULL;
p += strspn(p, WHITESPACES);
while (*p && !strspn(p, term)) {
char c = *p++;
if (c == '\\' && *p) {
*out++ = *p++;
end = out;
} else if (c == '\'') {
while (*p && *p != '\'')
*out++ = *p++;
if (*p) {
p++;
end = out;
}
} else {
*out++ = c;
}
}
do
*out-- = 0;
while (out >= end && strspn(out, WHITESPACES));
*buf = p;
return ret;
}
char *av_strtok(char *s, const char *delim, char **saveptr)
{
char *tok;
if (!s && !(s = *saveptr))
return NULL;
s += strspn(s, delim);
if (!*s) {
*saveptr = NULL;
return NULL;
}
tok = s++;
s += strcspn(s, delim);
if (*s) {
*s = 0;
*saveptr = s+1;
} else {
*saveptr = NULL;
}
return tok;
}
int av_strcasecmp(const char *a, const char *b)
{
uint8_t c1, c2;
do {
c1 = av_tolower(*a++);
c2 = av_tolower(*b++);
} while (c1 && c1 == c2);
return c1 - c2;
}
int av_strncasecmp(const char *a, const char *b, size_t n)
{
const char *end = a + n;
uint8_t c1, c2;
do {
c1 = av_tolower(*a++);
c2 = av_tolower(*b++);
} while (a < end && c1 && c1 == c2);
return c1 - c2;
}
const char *av_basename(const char *path)
{
char *p = strrchr(path, '/');
#if HAVE_DOS_PATHS
char *q = strrchr(path, '\\');
char *d = strchr(path, ':');
p = FFMAX3(p, q, d);
#endif
if (!p)
return path;
return p + 1;
}
const char *av_dirname(char *path)
{
char *p = strrchr(path, '/');
#if HAVE_DOS_PATHS
char *q = strrchr(path, '\\');
char *d = strchr(path, ':');
d = d ? d + 1 : d;
p = FFMAX3(p, q, d);
#endif
if (!p)
return ".";
*p = '\0';
return path;
}
int av_escape(char **dst, const char *src, const char *special_chars,
enum AVEscapeMode mode, int flags)
{
AVBPrint dstbuf;
av_bprint_init(&dstbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
if (!av_bprint_is_complete(&dstbuf)) {
av_bprint_finalize(&dstbuf, NULL);
return AVERROR(ENOMEM);
} else {
av_bprint_finalize(&dstbuf, dst);
return dstbuf.len;
}
}
int av_isdigit(int c)
{
return c >= '0' && c <= '9';
}
int av_isgraph(int c)
{
return c > 32 && c < 127;
}
int av_isspace(int c)
{
return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
c == '\v';
}
int av_isxdigit(int c)
{
c = av_tolower(c);
return av_isdigit(c) || (c >= 'a' && c <= 'f');
}
int av_match_name(const char *name, const char *names)
{
const char *p;
int len, namelen;
if (!name || !names)
return 0;
namelen = strlen(name);
while ((p = strchr(names, ','))) {
len = FFMAX(p - names, namelen);
if (!av_strncasecmp(name, names, len))
return 1;
names = p + 1;
}
return !av_strcasecmp(name, names);
}
int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
unsigned int flags)
{
const uint8_t *p = *bufp;
uint32_t top;
uint64_t code;
int ret = 0, tail_len;
uint32_t overlong_encoding_mins[6] = {
0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
};
if (p >= buf_end)
return 0;
code = *p++;
if ((code & 0xc0) == 0x80 || code >= 0xFE) {
ret = AVERROR(EILSEQ);
goto end;
}
top = (code & 128) >> 1;
tail_len = 0;
while (code & top) {
int tmp;
tail_len++;
if (p >= buf_end) {
(*bufp) ++;
return AVERROR(EILSEQ);
}
tmp = *p++ - 128;
if (tmp>>6) {
(*bufp) ++;
return AVERROR(EILSEQ);
}
code = (code<<6) + tmp;
top <<= 5;
}
code &= (top << 1) - 1;
av_assert0(tail_len <= 5);
if (code < overlong_encoding_mins[tail_len]) {
ret = AVERROR(EILSEQ);
goto end;
}
if (code >= 1<<31) {
ret = AVERROR(EILSEQ);
goto end;
}
*codep = code;
if (code > 0x10FFFF &&
!(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
ret = AVERROR(EILSEQ);
if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
ret = AVERROR(EILSEQ);
if (code >= 0xD800 && code <= 0xDFFF &&
!(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
ret = AVERROR(EILSEQ);
if ((code == 0xFFFE || code == 0xFFFF) &&
!(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
ret = AVERROR(EILSEQ);
end:
*bufp = p;
return ret;
}
int av_match_list(const char *name, const char *list, char separator)
{
const char *p, *q;
for (p = name; p && *p; ) {
for (q = list; q && *q; ) {
int k;
for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
if (k && (!p[k] || p[k] == separator))
return 1;
q = strchr(q, separator);
q += !!q;
}
p = strchr(p, separator);
p += !!p;
}
return 0;
}
#ifdef TEST
int main(void)
{
int i;
static const char * const strings[] = {
"''",
"",
":",
"\\",
"'",
" '' :",
" '' '' :",
"foo '' :",
"'foo'",
"foo ",
" ' foo ' ",
"foo\\",
"foo': blah:blah",
"foo\\: blah:blah",
"foo\'",
"'foo : ' :blahblah",
"\\ :blah",
" foo",
" foo ",
" foo \\ ",
"foo ':blah",
" foo bar : blahblah",
"\\f\\o\\o",
"'foo : \\ \\ ' : blahblah",
"'\\fo\\o:': blahblah",
"\\'fo\\o\\:': foo ' :blahblah"
};
printf("Testing av_get_token()\n");
for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
const char *p = strings[i];
char *q;
printf("|%s|", p);
q = av_get_token(&p, ":");
printf(" -> |%s|", q);
printf(" + |%s|\n", p);
av_free(q);
}
return 0;
}
#endif