diff options
Diffstat (limited to 'libavutil/avstring.c')
-rw-r--r-- | libavutil/avstring.c | 236 |
1 files changed, 221 insertions, 15 deletions
diff --git a/libavutil/avstring.c b/libavutil/avstring.c index bc7d0bcb98..1787a1ef54 100644 --- a/libavutil/avstring.c +++ b/libavutil/avstring.c @@ -2,20 +2,20 @@ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2007 Mans Rullgard * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg 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, + * FFmpeg 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 + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -27,7 +27,9 @@ #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) { @@ -54,11 +56,11 @@ int av_stristart(const char *str, const char *pfx, const char **ptr) char *av_stristr(const char *s1, const char *s2) { if (!*s2) - return s1; + return (char*)(intptr_t)s1; do if (av_stristart(s1, s2, NULL)) - return s1; + return (char*)(intptr_t)s1; while (*s1++); return NULL; @@ -68,11 +70,11 @@ char *av_strnstr(const char *haystack, const char *needle, size_t hay_length) { size_t needle_len = strlen(needle); if (!needle_len) - return haystack; + return (char*)haystack; while (hay_length >= needle_len) { hay_length--; if (!memcmp(haystack, needle, needle_len)) - return haystack; + return (char*)haystack; haystack++; } return NULL; @@ -98,7 +100,7 @@ size_t av_strlcat(char *dst, const char *src, size_t size) size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) { - int len = strlen(dst); + size_t len = strlen(dst); va_list vl; va_start(vl, fmt); @@ -108,6 +110,32 @@ size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) 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); @@ -116,7 +144,7 @@ char *av_d2str(double d) return str; } -#define WHITESPACES " \n\t" +#define WHITESPACES " \n\t\r" char *av_get_token(const char **buf, const char *term) { @@ -153,6 +181,35 @@ char *av_get_token(const char **buf, const char *term) return ret; } +char *av_strtok(char *s, const char *delim, char **saveptr) +{ + char *tok; + + if (!s && !(s = *saveptr)) + return NULL; + + /* skip leading delimiters */ + s += strspn(s, delim); + + /* s now points to the first non delimiter char, or to the end of the string */ + if (!*s) { + *saveptr = NULL; + return NULL; + } + tok = s++; + + /* skip non delimiters */ + 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; @@ -212,6 +269,54 @@ const char *av_dirname(char *path) return path; } +char *av_append_path_component(const char *path, const char *component) +{ + size_t p_len, c_len; + char *fullpath; + + if (!path) + return av_strdup(component); + if (!component) + return av_strdup(path); + + p_len = strlen(path); + c_len = strlen(component); + if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2) + return NULL; + fullpath = av_malloc(p_len + c_len + 2); + if (fullpath) { + if (p_len) { + av_strlcpy(fullpath, path, p_len + 1); + if (c_len) { + if (fullpath[p_len - 1] != '/' && component[0] != '/') + fullpath[p_len++] = '/'; + else if (fullpath[p_len - 1] == '/' && component[0] == '/') + p_len--; + } + } + av_strlcpy(&fullpath[p_len], component, c_len + 1); + fullpath[p_len + c_len] = 0; + } + return fullpath; +} + +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_match_name(const char *name, const char *names) { const char *p; @@ -221,11 +326,112 @@ int av_match_name(const char *name, const char *names) return 0; namelen = strlen(name); - while ((p = strchr(names, ','))) { + while (*names) { + int negate = '-' == *names; + p = strchr(names, ','); + if (!p) + p = names + strlen(names); + names += negate; len = FFMAX(p - names, namelen); - if (!av_strncasecmp(name, names, len)) - return 1; - names = p + 1; + if (!av_strncasecmp(name, names, len) || !strncmp("ALL", names, FFMAX(3, p - names))) + return !negate; + names = p + (*p == ','); } - return !av_strcasecmp(name, names); + return 0; +} + +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++; + + /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111, + which is not admitted */ + 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); /* incomplete sequence */ + } + + /* we assume the byte to be in the form 10xx-xxxx */ + tmp = *p++ - 128; /* strip leading 1 */ + if (tmp>>6) { + (*bufp) ++; + return AVERROR(EILSEQ); + } + code = (code<<6) + tmp; + top <<= 5; + } + code &= (top << 1) - 1; + + /* check for overlong encodings */ + av_assert0(tail_len <= 5); + if (code < overlong_encoding_mins[tail_len]) { + ret = AVERROR(EILSEQ); + goto end; + } + + if (code >= 1U<<31) { + ret = AVERROR(EILSEQ); /* out-of-range value */ + 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; } |