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/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
****************************************************************************
* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
****************************************************************************
*
* File: string.c
* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
* Changes:
*
* Date: Aug 2003
*
* Environment: Xen Minimal OS
* Description: Library function for string and memory manipulation
* Origin unknown
*
****************************************************************************
* $Id: c-insert.c,v 1.7 2002/11/08 16:04:34 rn Exp $
****************************************************************************
*/
#include <strings.h>
/* newlib defines ffs but not ffsll or ffsl */
int __ffsti2 (long long int lli)
{
int i, num, t, tmpint, len;
num = sizeof(long long int) / sizeof(int);
if (num == 1) return (ffs((int) lli));
len = sizeof(int) * 8;
for (i = 0; i < num; i++) {
tmpint = (int) (((lli >> len) << len) ^ lli);
t = ffs(tmpint);
if (t)
return (t + i * len);
lli = lli >> len;
}
return 0;
}
int __ffsdi2 (long int li)
{
return __ffsti2 ((long long int) li);
}
int ffsl (long int li)
{
return __ffsti2 ((long long int) li);
}
int ffsll (long long int lli)
{
return __ffsti2 (lli);
}
#if !defined HAVE_LIBC
#include <mini-os/os.h>
#include <mini-os/types.h>
#include <mini-os/lib.h>
#include <mini-os/xmalloc.h>
int memcmp(const void * cs,const void * ct,size_t count)
{
const unsigned char *su1, *su2;
signed char res = 0;
for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
if ((res = *su1 - *su2) != 0)
break;
return res;
}
void * memcpy(void * dest,const void *src,size_t count)
{
char *tmp = (char *) dest;
const char *s = src;
while (count--)
*tmp++ = *s++;
return dest;
}
int strncmp(const char * cs,const char * ct,size_t count)
{
register signed char __res = 0;
while (count) {
if ((__res = *cs - *ct++) != 0 || !*cs++)
break;
count--;
}
return __res;
}
int strcmp(const char * cs,const char * ct)
{
register signed char __res;
while (1) {
if ((__res = *cs - *ct++) != 0 || !*cs++)
break;
}
return __res;
}
char * strcpy(char * dest,const char *src)
{
char *tmp = dest;
while ((*dest++ = *src++) != '\0')
/* nothing */;
return tmp;
}
char * strncpy(char * dest,const char *src,size_t count)
{
char *tmp = dest;
while (count-- && (*dest++ = *src++) != '\0')
/* nothing */;
return tmp;
}
void * memset(void * s,int c,size_t count)
{
char *xs = (char *) s;
while (count--)
*xs++ = c;
return s;
}
size_t strnlen(const char * s, size_t count)
{
const char *sc;
for (sc = s; count-- && *sc != '\0'; ++sc)
/* nothing */;
return sc - s;
}
char * strcat(char * dest, const char * src)
{
char *tmp = dest;
while (*dest)
dest++;
while ((*dest++ = *src++) != '\0');
return tmp;
}
size_t strlen(const char * s)
{
const char *sc;
for (sc = s; *sc != '\0'; ++sc)
/* nothing */;
return sc - s;
}
char * strchr(const char * s, int c)
{
for(; *s != (char) c; ++s)
if (*s == '\0')
return NULL;
return (char *)s;
}
char * strrchr(const char * s, int c)
{
const char *res = NULL;
for(; *s != '\0'; ++s)
if (*s == (char) c)
res = s;
return (char *)res;
}
char * strstr(const char * s1,const char * s2)
{
int l1, l2;
l2 = strlen(s2);
if (!l2)
return (char *) s1;
l1 = strlen(s1);
while (l1 >= l2) {
l1--;
if (!memcmp(s1,s2,l2))
return (char *) s1;
s1++;
}
return NULL;
}
char *strdup(const char *x)
{
int l = strlen(x);
char *res = malloc(l + 1);
if (!res) return NULL;
memcpy(res, x, l + 1);
return res;
}
int ffs(int i)
{
int c = 1;
do {
if (i & 1)
return (c);
i = i >> 1;
c++;
} while (i);
return 0;
}
#endif
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