Sha256: 39d7dea51b329bb8a354703a68f661a2a3e931d65500f74c54902cd4251b5d8d
Contents?: true
Size: 1.09 KB
Versions: 8
Compression:
Stored size: 1.09 KB
Contents
/*
* This code was written by Rich Felker in 2010; no copyright is claimed.
* This code is in the public domain. Attribution is appreciated but
* unnecessary.
*/
#include <stdlib.h>
#include <inttypes.h>
#include <wchar.h>
#include <errno.h>
#include "internal.h"
#include <stdio.h>
int mbtowc(wchar_t *restrict wc, const char *restrict src, size_t n)
{
unsigned c;
const unsigned char *s = (const void *)src;
if (!s) return 0;
if (!n) goto ilseq;
if (!wc) wc = (void *)&wc;
if (*s < 0x80) return !!(*wc = *s);
if (*s-SA > SB-SA) goto ilseq;
c = bittab[*s++-SA];
/* Avoid excessive checks against n: If shifting the state n-1
* times does not clear the high bit, then the value of n is
* insufficient to read a character */
if (n<4 && ((c<<(6*n-6)) & (1U<<31))) goto ilseq;
if (OOB(c,*s)) goto ilseq;
c = c<<6 | *s++-0x80;
if (!(c&(1U<<31))) {
*wc = c;
return 2;
}
if (*s-0x80u >= 0x40) goto ilseq;
c = c<<6 | *s++-0x80;
if (!(c&(1U<<31))) {
*wc = c;
return 3;
}
if (*s-0x80u >= 0x40) goto ilseq;
*wc = c<<6 | *s++-0x80;
return 4;
ilseq:
errno = EILSEQ;
return -1;
}
Version data entries
8 entries across 8 versions & 1 rubygems