Sweden-Number/dlls/msvcrt/string.c

157 lines
3.2 KiB
C

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