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#ifndef _LINUX_STRING_H_
#define _LINUX_STRING_H_
#include <sys/types.h> /* for size_t */
#ifndef NULL
#define NULL ((void *) 0)
#endif
extern inline size_t _dl_strlen(const char * str)
{
register char *ptr = (char *) str;
while (*ptr)
ptr++;
return (ptr - str);
}
extern inline char * _dl_strcpy(char * dst,const char *src)
{
register char *ptr = dst;
while (*src)
*dst++ = *src++;
*dst = '\0';
return ptr;
}
extern inline int _dl_strcmp(const char * s1,const char * s2)
{
unsigned register char c1, c2;
do {
c1 = (unsigned char) *s1++;
c2 = (unsigned char) *s2++;
if (c1 == '\0')
return c1 - c2;
}
while (c1 == c2);
return c1 - c2;
}
extern inline int _dl_strncmp(const char * s1,const char * s2,size_t len)
{
unsigned register char c1 = '\0';
unsigned register char c2 = '\0';
while (len > 0) {
c1 = (unsigned char) *s1++;
c2 = (unsigned char) *s2++;
if (c1 == '\0' || c1 != c2)
return c1 - c2;
len--;
}
return c1 - c2;
}
extern inline char * _dl_strchr(const char * str,int c)
{
register char ch;
do {
if ((ch = *str) == c)
return (char *) str;
str++;
}
while (ch);
return 0;
}
static inline char *_dl_strrchr(const char *str, int c)
{
register char *prev = 0;
register char *ptr = (char *) str;
/* For null it's just like strlen */
if (c == '\0') {
return ptr + _dl_strlen(ptr);
}
/* everything else just step along the string. */
while ((ptr = _dl_strchr(ptr, c)) != 0) {
prev = ptr;
ptr++;
}
return prev;
}
extern inline void * _dl_memcpy(void * dst, const void * src, size_t len)
{
register char *a = dst;
register const char *b = src;
while (len--)
*a++ = *b++;
return dst;
}
extern inline int _dl_memcmp(const void * s1,const void * s2,size_t len)
{
unsigned char *c1 = (unsigned char *)s1;
unsigned char *c2 = (unsigned char *)s2;
while (len--) {
if (*c1 != *c2)
return *c1 - *c2;
c1++;
c2++;
}
return 0;
}
extern inline void * _dl_memset(void * str,int c,size_t len)
{
register char *a = str;
while (len--)
*a++ = c;
return str;
}
/* Early on, we can't call printf, so use this to print out
* numbers using the SEND_STDERR() macro */
static inline char *_dl_simple_ltoa(unsigned long i)
{
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
static char local[22];
char *p = &local[21];
*p-- = '\0';
do {
*p-- = '0' + i % 10;
i /= 10;
} while (i > 0);
return p + 1;
}
static inline char *_dl_simple_ltoahex(unsigned long i)
{
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
static char local[22];
char *p = &local[21];
*p-- = '\0';
do {
char temp = i % 0x10;
if (temp <= 0x09)
*p-- = '0' + temp;
else
*p-- = 'a' - 0x0a + temp;
i /= 0x10;
} while (i > 0);
*p-- = 'x';
*p-- = '0';
return p + 1;
}
#endif
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