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// MIT License, Copyright (c) 2020 Marvin Borner
#include <def.h>
#include <errno.h>
#include <mem.h>
#include <str.h>
u32 strlen(const char *s)
{
const char *ss = s;
while (*ss)
ss++;
return ss - s;
}
char *strcpy(char *dst, const char *src)
{
char *q = dst;
const char *p = src;
char ch;
do {
*q++ = ch = *p++;
} while (ch);
return dst;
}
char *strncpy(char *dst, const char *src, u32 n)
{
char *q = dst;
while (n-- && (*dst++ = *src++))
;
return q;
}
int strcmp(const char *s1, const char *s2)
{
const u8 *c1 = (const u8 *)s1;
const u8 *c2 = (const u8 *)s2;
u8 ch;
int d = 0;
while (1) {
d = (int)(ch = *c1++) - (int)*c2++;
if (d || !ch)
break;
}
return d;
}
int strncmp(const char *s1, const char *s2, u32 n)
{
const u8 *c1 = (const u8 *)s1;
const u8 *c2 = (const u8 *)s2;
u8 ch;
int d = 0;
while (n--) {
d = (int)(ch = *c1++) - (int)*c2++;
if (d || !ch)
break;
}
return d;
}
char *strchr(char *s, int c)
{
while (*s != (char)c) {
if (!*s)
return NULL;
s++;
}
return s;
}
char *strrchr(char *s, int c)
{
char *ret = 0;
do {
if (*s == c)
ret = s;
} while (*s++);
return ret;
}
char *strcat(char *dst, const char *src)
{
strcpy(strchr(dst, '\0'), src);
return dst;
}
char *strncat(char *dst, const char *src, u32 n)
{
strncpy(strchr(dst, '\0'), src, n);
return dst;
}
char *strinv(char *s)
{
u32 s_str = strlen(s);
int iterations = (int)s_str / 2;
for (int i = 0; i < iterations; i++) {
char aux = s[i];
s[i] = s[(s_str - i) - 1];
s[(s_str - i) - 1] = aux;
}
return s;
}
char *strdup(const char *s)
{
int l = strlen(s) + 1;
char *d = malloc(l);
memcpy(d, s, l);
return d;
}
const char *strerror(u32 error)
{
switch (error) {
case 0:
return "Success";
case EPERM:
return "Operation not permitted";
case ENOENT:
return "No such file or directory";
case ESRCH:
return "No such process";
case EINTR:
return "Interrupted system call";
case EIO:
return "I/O error";
case ENXIO:
return "No such device or address";
case E2BIG:
return "Argument list too long";
case ENOEXEC:
return "Exec format error";
case EBADF:
return "Bad file number";
case ECHILD:
return "No child processes";
case EAGAIN:
return "Try again";
case ENOMEM:
return "Out of memory";
case EACCES:
return "Permission denied";
case EFAULT:
return "Bad address";
case ENOTBLK:
return "Block device required";
case EBUSY:
return "Device or resource busy";
case EEXIST:
return "File exists";
case EXDEV:
return "Cross-device link";
case ENODEV:
return "No such device";
case ENOTDIR:
return "Not a directory";
case EISDIR:
return "Is a directory";
case EINVAL:
return "Invalid argument";
case ENFILE:
return "File table overflow";
case EMFILE:
return "Too many open files";
case ENOTTY:
return "Not a typewriter";
case ETXTBSY:
return "Text file busy";
case EFBIG:
return "File too large";
case ENOSPC:
return "No space left on device";
case ESPIPE:
return "Illegal seek";
case EROFS:
return "Read-only file system";
case EMLINK:
return "Too many links";
case EPIPE:
return "Broken pipe";
case EDOM:
return "Math argument out of domain of func";
case ERANGE:
return "Math result not representable";
case EMAX:
return "Max errno";
default:
return "Unknown error";
}
}
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