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#include "kernel/types.h"
#include "kernel/stat.h"
#include "kernel/fcntl.h"
#include "user/user.h"
char*
strcpy(char *s, const char *t)
{
char *os;
os = s;
while((*s++ = *t++) != 0)
;
return os;
}
int
strcmp(const char *p, const char *q)
{
while(*p && *p == *q)
p++, q++;
return (uchar)*p - (uchar)*q;
}
uint
strlen(const char *s)
{
int n;
for(n = 0; s[n]; n++)
;
return n;
}
void*
memset(void *dst, int c, uint n)
{
char *cdst = (char *) dst;
int i;
for(i = 0; i < n; i++){
cdst[i] = c;
}
return dst;
}
char*
strchr(const char *s, char c)
{
for(; *s; s++)
if(*s == c)
return (char*)s;
return 0;
}
char*
gets(char *buf, int max)
{
int i, cc;
char c;
for(i=0; i+1 < max; ){
cc = read(0, &c, 1);
if(cc < 1)
break;
buf[i++] = c;
if(c == '\n' || c == '\r')
break;
}
buf[i] = '\0';
return buf;
}
int
stat(const char *n, struct stat *st)
{
int fd;
int r;
fd = open(n, O_RDONLY);
if(fd < 0)
return -1;
r = fstat(fd, st);
close(fd);
return r;
}
int
atoi(const char *s)
{
int n;
n = 0;
while('0' <= *s && *s <= '9')
n = n*10 + *s++ - '0';
return n;
}
void*
memmove(void *vdst, const void *vsrc, int n)
{
char *dst;
const char *src;
dst = vdst;
src = vsrc;
while(n-- > 0)
*dst++ = *src++;
return vdst;
}
int
memcmp(const void *s1, const void *s2, uint n)
{
const char *p1 = s1, *p2 = s2;
while (n-- > 0) {
if (*p1 != *p2) {
return *p1 - *p2;
}
p1++;
p2++;
}
return 0;
}
void *
memcpy(void *dst, const void *src, uint n)
{
return memmove(dst, src, n);
}
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