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- /*
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
- * Copyright (c) 2007 Mans Rullgard
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #include <stdarg.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <string.h>
- #include "config.h"
- #include "common.h"
- #include "mem.h"
- #include "avstring.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 s1;
- do
- if (av_stristart(s1, s2, NULL))
- return 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 haystack;
- while (hay_length >= needle_len) {
- hay_length--;
- if (!memcmp(haystack, needle, needle_len))
- return 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_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;
- }
- 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_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);
- }
- #ifdef TEST
- int main(void)
- {
- int i;
- const char *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 /* TEST */
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