516 lines
12 KiB
C
516 lines
12 KiB
C
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/* $Header: /pjproject-0.3/pjlib/include/pj/string.h 8 10/14/05 12:26a Bennylp $ */
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#ifndef __PJ_STRING_H__
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#define __PJ_STRING_H__
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/**
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* @file string.h
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* @brief PJLIB String Operations.
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*/
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#include <pj/types.h>
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#include <pj/compat/string.h>
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PJ_BEGIN_DECL
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/**
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* @defgroup PJ_PSTR String Operations
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* @ingroup PJ_DS
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* @{
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* This module provides string manipulation API.
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*
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* \section pj_pstr_not_null_sec PJLIB String is NOT Null Terminated!
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*
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* That is the first information that developers need to know. Instead
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* of using normal C string, strings in PJLIB are represented as
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* pj_str_t structure below:
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*
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* <pre>
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* typedef struct pj_str_t
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* {
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* char *ptr;
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* pj_size_t slen;
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* } pj_str_t;
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* </pre>
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*
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* There are some advantages of using this approach:
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* - the string can point to arbitrary location in memory even
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* if the string in that location is not null terminated. This is
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* most usefull for text parsing, where the parsed text can just
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* point to the original text in the input. If we use C string,
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* then we will have to copy the text portion from the input
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* to a string variable.
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* - because the length of the string is known, string copy operation
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* can be made more efficient.
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*
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* Most of APIs in PJLIB that expect or return string will represent
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* the string as pj_str_t instead of normal C string.
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*
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* \section pj_pstr_examples_sec Examples
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*
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* For some examples, please see:
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* - @ref page_pjlib_string_test
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*/
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/**
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* Create string initializer from a normal C string.
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*
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* @param str Null terminated string to be stored.
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*
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* @return pj_str_t.
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*/
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PJ_IDECL(pj_str_t) pj_str(char *str);
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/**
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* Create constant string from normal C string.
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*
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* @param str The string to be initialized.
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* @param s Null terminated string.
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*
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* @return pj_str_t.
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*/
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PJ_INLINE(const pj_str_t*) pj_cstr(pj_str_t *str, const char *s)
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{
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str->ptr = (char*)s;
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str->slen = s ? strlen(s) : 0;
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return str;
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}
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/**
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* Set the pointer and length to the specified value.
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*
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* @param str the string.
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* @param ptr pointer to set.
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* @param length length to set.
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*
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* @return the string.
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*/
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PJ_INLINE(pj_str_t*) pj_strset( pj_str_t *str, char *ptr, pj_size_t length)
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{
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str->ptr = ptr;
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str->slen = length;
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return str;
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}
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/**
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* Set the pointer and length of the string to the source string, which
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* must be NULL terminated.
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*
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* @param str the string.
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* @param src pointer to set.
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*
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* @return the string.
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*/
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PJ_INLINE(pj_str_t*) pj_strset2( pj_str_t *str, char *src)
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{
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str->ptr = src;
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str->slen = src ? strlen(src) : 0;
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return str;
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}
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/**
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* Set the pointer and the length of the string.
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*
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* @param str The target string.
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* @param begin The start of the string.
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* @param end The end of the string.
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*
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* @return the target string.
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*/
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PJ_INLINE(pj_str_t*) pj_strset3( pj_str_t *str, char *begin, char *end )
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{
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str->ptr = begin;
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str->slen = end-begin;
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return str;
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}
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/**
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* Assign string.
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*
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* @param dst The target string.
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* @param src The source string.
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*
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* @return the target string.
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*/
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PJ_IDECL(pj_str_t*) pj_strassign( pj_str_t *dst, pj_str_t *src );
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/**
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* Copy string contents.
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*
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* @param dst The target string.
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* @param src The source string.
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*
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* @return the target string.
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*/
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PJ_IDECL(pj_str_t*) pj_strcpy(pj_str_t *dst, const pj_str_t *src);
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/**
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* Copy string contents.
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*
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* @param dst The target string.
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* @param src The source string.
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*
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* @return the target string.
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*/
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PJ_IDECL(pj_str_t*) pj_strcpy2(pj_str_t *dst, const char *src);
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/**
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* Duplicate string.
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*
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* @param pool The pool.
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* @param dst The string result.
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* @param src The string to duplicate.
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*
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* @return the string result.
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*/
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PJ_IDECL(pj_str_t*) pj_strdup(pj_pool_t *pool,
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pj_str_t *dst,
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const pj_str_t *src);
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/**
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* Duplicate string and NULL terminate the destination string.
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*
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* @param pool
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* @param dst
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* @param src
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*/
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PJ_IDECL(pj_str_t*) pj_strdup_with_null(pj_pool_t *pool,
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pj_str_t *dst,
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const pj_str_t *src);
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/**
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* Duplicate string.
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*
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* @param pool The pool.
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* @param dst The string result.
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* @param src The string to duplicate.
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*
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* @return the string result.
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*/
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PJ_IDECL(pj_str_t*) pj_strdup2(pj_pool_t *pool,
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pj_str_t *dst,
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const char *src);
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/**
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* Duplicate string.
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*
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* @param pool The pool.
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* @param src The string to duplicate.
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*
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* @return the string result.
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*/
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PJ_IDECL(pj_str_t) pj_strdup3(pj_pool_t *pool, const char *src);
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/**
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* Return the length of the string.
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*
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* @param str The string.
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*
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* @return the length of the string.
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*/
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PJ_INLINE(pj_size_t) pj_strlen( const pj_str_t *str )
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{
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return str->slen;
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}
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/**
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* Return the pointer to the string data.
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*
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* @param str The string.
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*
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* @return the pointer to the string buffer.
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*/
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PJ_INLINE(const char*) pj_strbuf( const pj_str_t *str )
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{
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return str->ptr;
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}
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/**
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* Compare strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strcmp( const pj_str_t *str1, const pj_str_t *str2);
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/**
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* Compare strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strcmp2( const pj_str_t *str1, const char *str2 );
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/**
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* Compare strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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* @param len The maximum number of characters to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strncmp( const pj_str_t *str1, const pj_str_t *str2,
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pj_size_t len);
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/**
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* Compare strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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* @param len The maximum number of characters to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strncmp2( const pj_str_t *str1, const char *str2,
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pj_size_t len);
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/**
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* Perform lowercase comparison to the strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_stricmp( const pj_str_t *str1, const pj_str_t *str2);
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/**
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* Perform lowercase comparison to the strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_stricmp2( const pj_str_t *str1, const char *str2);
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/**
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* Perform lowercase comparison to the strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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* @param len The maximum number of characters to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strnicmp( const pj_str_t *str1, const pj_str_t *str2,
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pj_size_t len);
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/**
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* Perform lowercase comparison to the strings.
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*
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* @param str1 The string to compare.
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* @param str2 The string to compare.
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* @param len The maximum number of characters to compare.
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*
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* @return
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* - < 0 if str1 is less than str2
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* - 0 if str1 is identical to str2
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* - > 0 if str1 is greater than str2
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*/
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PJ_IDECL(int) pj_strnicmp2( const pj_str_t *str1, const char *str2,
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pj_size_t len);
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/**
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* Concatenate strings.
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*
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* @param dst The destination string.
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* @param src The source string.
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*/
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PJ_IDECL(void) pj_strcat(pj_str_t *dst, const pj_str_t *src);
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/**
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* Finds a character in a string.
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*
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* @param str The string.
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* @param chr The character to find.
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*
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* @return the pointer to first character found, or NULL.
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*/
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PJ_INLINE(char*) pj_strchr( pj_str_t *str, int chr)
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{
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return (char*) memchr(str->ptr, chr, str->slen);
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}
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/**
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* Remove (trim) leading whitespaces from the string.
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*
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* @param str The string.
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*
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* @return the string.
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*/
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PJ_DECL(pj_str_t*) pj_strltrim( pj_str_t *str );
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/**
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* Remove (trim) the trailing whitespaces from the string.
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*
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* @param str The string.
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*
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* @return the string.
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*/
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PJ_DECL(pj_str_t*) pj_strrtrim( pj_str_t *str );
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/**
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* Remove (trim) leading and trailing whitespaces from the string.
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*
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* @param str The string.
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*
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* @return the string.
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*/
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PJ_IDECL(pj_str_t*) pj_strtrim( pj_str_t *str );
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/**
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* Initialize the buffer with some random string.
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*
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* @param str the string to store the result.
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* @param length the length of the random string to generate.
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*
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* @return the string.
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*/
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PJ_DECL(char*) pj_create_random_string(char *str, pj_size_t length);
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/**
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* Convert string to unsigned integer.
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*
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* @param str the string.
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*
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* @return the unsigned integer.
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*/
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PJ_DECL(unsigned long) pj_strtoul(const pj_str_t *str);
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/**
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* Utility to convert unsigned integer to string. Note that the
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* string will be NULL terminated.
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*
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* @param val the unsigned integer value.
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* @param buf the buffer
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*
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* @return the number of characters written
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*/
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PJ_DECL(int) pj_utoa(unsigned long val, char *buf);
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/**
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* Convert unsigned integer to string with minimum digits. Note that the
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* string will be NULL terminated.
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*
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* @param val The unsigned integer value.
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* @param buf The buffer.
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* @param min_dig Minimum digits to be printed, or zero to specify no
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* minimum digit.
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* @param pad The padding character to be put in front of the string
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* when the digits is less than minimum.
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*
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* @return the number of characters written.
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*/
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PJ_DECL(int) pj_utoa_pad( unsigned long val, char *buf, int min_dig, int pad);
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/**
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* Fill the memory location with value.
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*
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* @param dst The destination buffer.
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* @param c Character to set.
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* @param size The number of characters.
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*
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* @return the value of dst.
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*/
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PJ_INLINE(void*) pj_memset(void *dst, int c, pj_size_t size)
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{
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return memset(dst, c, size);
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}
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/**
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* Copy buffer.
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*
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* @param dst The destination buffer.
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* @param src The source buffer.
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* @param size The size to copy.
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*
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* @return the destination buffer.
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*/
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PJ_INLINE(void*) pj_memcpy(void *dst, const void *src, pj_size_t size)
|
||
|
{
|
||
|
return memcpy(dst, src, size);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Move memory.
|
||
|
*
|
||
|
* @param dst The destination buffer.
|
||
|
* @param src The source buffer.
|
||
|
* @param size The size to copy.
|
||
|
*
|
||
|
* @return the destination buffer.
|
||
|
*/
|
||
|
PJ_INLINE(void*) pj_memmove(void *dst, const void *src, pj_size_t size)
|
||
|
{
|
||
|
return memmove(dst, src, size);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Compare buffers.
|
||
|
*
|
||
|
* @param buf1 The first buffer.
|
||
|
* @param buf2 The second buffer.
|
||
|
* @param size The size to compare.
|
||
|
*
|
||
|
* @return negative, zero, or positive value.
|
||
|
*/
|
||
|
PJ_INLINE(int) pj_memcmp(const void *buf1, const void *buf2, pj_size_t size)
|
||
|
{
|
||
|
return memcmp(buf1, buf2, size);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Find character in the buffer.
|
||
|
*
|
||
|
* @param buf The buffer.
|
||
|
* @param c The character to find.
|
||
|
* @param size The size to check.
|
||
|
*
|
||
|
* @return the pointer to location where the character is found, or NULL if
|
||
|
* not found.
|
||
|
*/
|
||
|
PJ_INLINE(void*) pj_memchr(const void *buf, int c, pj_size_t size)
|
||
|
{
|
||
|
return memchr(buf, c, size);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
#if PJ_FUNCTIONS_ARE_INLINED
|
||
|
# include <pj/string_i.h>
|
||
|
#endif
|
||
|
|
||
|
PJ_END_DECL
|
||
|
|
||
|
#endif /* __PJ_STRING_H__ */
|
||
|
|