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158 lines
3.2 KiB
C
158 lines
3.2 KiB
C
/*
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* MSVCRT string functions
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*
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* Copyright 1996,1998 Marcus Meissner
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* Copyright 1996 Jukka Iivonen
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* Copyright 1997,2000 Uwe Bonnes
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* Copyright 2000 Jon Griffiths
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*/
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#include "msvcrt.h"
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#include "msvcrt/stdlib.h"
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#include "msvcrt/string.h"
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DEFAULT_DEBUG_CHANNEL(msvcrt);
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/* INTERNAL: MSVCRT_malloc() based strndup */
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char* msvcrt_strndup(const char* buf, unsigned int size)
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{
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char* ret;
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unsigned int len = strlen(buf), max_len;
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max_len = size <= len? size : len + 1;
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ret = MSVCRT_malloc(max_len);
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if (ret)
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{
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memcpy(ret,buf,max_len);
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ret[max_len] = 0;
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}
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return ret;
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}
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/*********************************************************************
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* _strdec (MSVCRT.@)
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*/
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char* _strdec(const char* str1, const char* str2)
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{
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/* Hmm. While the docs suggest that the following should work... */
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/* return (str2<=str1?0:str2-1); */
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/* ...Version 2.50.4170 (NT) from win98 constantly decrements! */
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str1 = str1; /* remove warning */
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return (char *)str2-1;
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}
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/*********************************************************************
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* _mbsdup (MSVCRT.@)
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* _strdup (MSVCRT.@)
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*/
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char* _strdup(const char* str)
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{
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char * ret = MSVCRT_malloc(strlen(str)+1);
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if (ret) strcpy( ret, str );
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return ret;
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}
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/*********************************************************************
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* _strinc (MSVCRT.@)
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*/
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char* _strinc(const char* str)
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{
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return (char*)str+1;
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}
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/*********************************************************************
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* _strnextc (MSVCRT.@)
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*/
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unsigned int _strnextc(const char* str)
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{
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return (unsigned int)*str;
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}
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/*********************************************************************
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* _strninc (MSVCRT.@)
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*
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* Return a pointer to the 'n'th character in a string
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*/
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char* _strninc(char* str, unsigned int n)
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{
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return str + n;
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}
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/*********************************************************************
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* _strnset (MSVCRT.@)
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*/
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char* _strnset(char* str, int value, unsigned int len)
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{
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if (len > 0 && str)
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while (*str && len--)
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*str++ = value;
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return str;
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}
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/*********************************************************************
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* _strrev (MSVCRT.@)
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*/
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char* _strrev(char* str)
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{
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char * p1;
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char * p2;
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if (str && *str)
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for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
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{
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*p1 ^= *p2;
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*p2 ^= *p1;
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*p1 ^= *p2;
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}
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return str;
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}
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/*********************************************************************
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* _strset (MSVCRT.@)
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*/
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char* _strset(char* str, int value)
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{
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char *ptr = str;
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while (*ptr)
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*ptr++ = value;
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return str;
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}
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/*********************************************************************
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* _strncnt (MSVCRT.@)
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*/
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unsigned int _strncnt(char* str, unsigned int max)
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{
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unsigned int len = strlen(str);
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return (len > max? max : len);
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}
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/*********************************************************************
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* _strspnp (MSVCRT.@)
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*/
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char* _strspnp(char* str1, char* str2)
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{
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str1 += strspn(str1,str2);
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return *str1? str1 : 0;
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}
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/*********************************************************************
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* _swab (MSVCRT.@)
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*/
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void _swab(char* src, char* dst, int len)
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{
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if (len > 1)
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{
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len = (unsigned)len >> 1;
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while (len--) {
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*dst++ = src[1];
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*dst++ = *src++;
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src++;
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}
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}
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}
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