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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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* Copyright (c) 2007 Mans Rullgard
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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int av_strstart(const char *str, const char *pfx, const char **ptr)
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while (*pfx && *pfx == *str) {
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int av_stristart(const char *str, const char *pfx, const char **ptr)
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while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) {
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size_t av_strlcpy(char *dst, const char *src, size_t size)
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while (++len < size && *src)
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return len + strlen(src) - 1;
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size_t av_strlcat(char *dst, const char *src, size_t size)
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size_t len = strlen(dst);
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return len + strlen(src);
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return len + av_strlcpy(dst + len, src, size - len);
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size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
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int len = strlen(dst);
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len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);