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Diffstat (limited to 'media/libav/libavutil/avstring.c')
| -rw-r--r-- | media/libav/libavutil/avstring.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/media/libav/libavutil/avstring.c b/media/libav/libavutil/avstring.c new file mode 100644 index 000000000..eb5c95a01 --- /dev/null +++ b/media/libav/libavutil/avstring.c @@ -0,0 +1,305 @@ +/* + * 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 */ |