1a81e38b17
Variable declarations at top of function,
separate from initialization.
Use == 0 instead of ! for checking pointers.
Consistent spacing around {, *, casts.
Declare 0-parameter functions as (void) not ().
Integer valued functions return -1 on failure, 0 on success.
106 lines
1.2 KiB
C
106 lines
1.2 KiB
C
#include "types.h"
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#include "stat.h"
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#include "fcntl.h"
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#include "user.h"
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#include "x86.h"
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char*
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strcpy(char *s, char *t)
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{
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char *os;
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os = s;
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while((*s++ = *t++) != 0)
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;
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return os;
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}
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int
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strcmp(const char *p, const char *q)
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{
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while(*p && *p == *q)
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p++, q++;
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return (uchar)*p - (uchar)*q;
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}
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uint
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strlen(char *s)
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{
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int n;
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for(n = 0; s[n]; n++)
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;
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return n;
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}
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void*
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memset(void *dst, int c, uint n)
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{
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stosb(dst, c, n);
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return dst;
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}
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char*
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strchr(const char *s, char c)
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{
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for(; *s; s++)
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if(*s == c)
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return (char*)s;
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return 0;
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}
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char*
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gets(char *buf, int max)
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{
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int i, cc;
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char c;
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for(i=0; i+1 < max; ){
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cc = read(0, &c, 1);
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if(cc < 1)
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break;
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buf[i++] = c;
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if(c == '\n' || c == '\r')
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break;
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}
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buf[i] = '\0';
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return buf;
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}
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int
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stat(char *n, struct stat *st)
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{
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int fd;
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int r;
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fd = open(n, O_RDONLY);
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if(fd < 0)
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return -1;
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r = fstat(fd, st);
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close(fd);
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return r;
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}
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int
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atoi(const char *s)
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{
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int n;
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n = 0;
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while('0' <= *s && *s <= '9')
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n = n*10 + *s++ - '0';
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return n;
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}
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void*
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memmove(void *vdst, void *vsrc, int n)
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{
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char *dst, *src;
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dst = vdst;
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src = vsrc;
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while(n-- > 0)
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*dst++ = *src++;
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return vdst;
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}
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