author | Wuzzy <almikes@aol.com> |
Sat, 15 Apr 2017 06:52:14 +0200 | |
changeset 12256 | 789277d46784 |
parent 7813 | 7ac83d79b897 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007 Mans Rullgard |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* |
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* Libav 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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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; 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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*/ |
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#ifndef AVUTIL_AVSTRING_H |
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#define AVUTIL_AVSTRING_H |
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#include <stddef.h> |
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#include "attributes.h" |
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|
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/** |
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* @addtogroup lavu_string |
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* @{ |
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*/ |
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/** |
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* Return non-zero if pfx is a prefix of str. If it is, *ptr is set to |
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* the address of the first character in str after the prefix. |
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* |
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* @param str input string |
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* @param pfx prefix to test |
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* @param ptr updated if the prefix is matched inside str |
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* @return non-zero if the prefix matches, zero otherwise |
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*/ |
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int av_strstart(const char *str, const char *pfx, const char **ptr); |
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/** |
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* Return non-zero if pfx is a prefix of str independent of case. If |
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* it is, *ptr is set to the address of the first character in str |
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* after the prefix. |
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* |
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* @param str input string |
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* @param pfx prefix to test |
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* @param ptr updated if the prefix is matched inside str |
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* @return non-zero if the prefix matches, zero otherwise |
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*/ |
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int av_stristart(const char *str, const char *pfx, const char **ptr); |
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/** |
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* Locate the first case-independent occurrence in the string haystack |
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* of the string needle. A zero-length string needle is considered to |
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* match at the start of haystack. |
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* |
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* This function is a case-insensitive version of the standard strstr(). |
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* |
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* @param haystack string to search in |
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* @param needle string to search for |
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* @return pointer to the located match within haystack |
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* or a null pointer if no match |
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*/ |
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char *av_stristr(const char *haystack, const char *needle); |
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/** |
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* Copy the string src to dst, but no more than size - 1 bytes, and |
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* null-terminate dst. |
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* |
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* This function is the same as BSD strlcpy(). |
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* |
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* @param dst destination buffer |
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* @param src source string |
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* @param size size of destination buffer |
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* @return the length of src |
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* |
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* @warning since the return value is the length of src, src absolutely |
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* _must_ be a properly 0-terminated string, otherwise this will read beyond |
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* the end of the buffer and possibly crash. |
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*/ |
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size_t av_strlcpy(char *dst, const char *src, size_t size); |
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/** |
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* Append the string src to the string dst, but to a total length of |
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* no more than size - 1 bytes, and null-terminate dst. |
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* |
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* This function is similar to BSD strlcat(), but differs when |
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* size <= strlen(dst). |
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* |
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* @param dst destination buffer |
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* @param src source string |
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* @param size size of destination buffer |
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* @return the total length of src and dst |
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* |
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* @warning since the return value use the length of src and dst, these |
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* absolutely _must_ be a properly 0-terminated strings, otherwise this |
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* will read beyond the end of the buffer and possibly crash. |
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*/ |
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size_t av_strlcat(char *dst, const char *src, size_t size); |
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/** |
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* Append output to a string, according to a format. Never write out of |
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* the destination buffer, and always put a terminating 0 within |
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* the buffer. |
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* @param dst destination buffer (string to which the output is |
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* appended) |
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* @param size total size of the destination buffer |
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* @param fmt printf-compatible format string, specifying how the |
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* following parameters are used |
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* @return the length of the string that would have been generated |
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* if enough space had been available |
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*/ |
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size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4); |
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/** |
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* Convert a number to a av_malloced string. |
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*/ |
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char *av_d2str(double d); |
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/** |
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* Unescape the given string until a non escaped terminating char, |
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* and return the token corresponding to the unescaped string. |
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* |
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* The normal \ and ' escaping is supported. Leading and trailing |
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* whitespaces are removed, unless they are escaped with '\' or are |
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* enclosed between ''. |
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* |
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* @param buf the buffer to parse, buf will be updated to point to the |
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* terminating char |
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* @param term a 0-terminated list of terminating chars |
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* @return the malloced unescaped string, which must be av_freed by |
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* the user, NULL in case of allocation failure |
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*/ |
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char *av_get_token(const char **buf, const char *term); |
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/** |
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* Locale-independent conversion of ASCII characters to uppercase. |
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*/ |
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static inline int av_toupper(int c) |
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{ |
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if (c >= 'a' && c <= 'z') |
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c ^= 0x20; |
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return c; |
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} |
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/** |
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* Locale-independent conversion of ASCII characters to lowercase. |
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*/ |
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static inline int av_tolower(int c) |
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{ |
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if (c >= 'A' && c <= 'Z') |
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c ^= 0x20; |
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return c; |
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} |
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|
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/* |
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* Locale-independent case-insensitive compare. |
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* @note This means only ASCII-range characters are case-insensitive |
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*/ |
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int av_strcasecmp(const char *a, const char *b); |
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|
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/** |
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* Locale-independent case-insensitive compare. |
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* @note This means only ASCII-range characters are case-insensitive |
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*/ |
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int av_strncasecmp(const char *a, const char *b, size_t n); |
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|
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/** |
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* @} |
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*/ |
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|
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#endif /* AVUTIL_AVSTRING_H */ |