-/*
- * 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 <stdint.h>
#include <wchar.h>
#include <errno.h>
-
+#include <string.h>
+#include <stdlib.h>
#include "internal.h"
size_t mbsrtowcs(wchar_t *restrict ws, const char **restrict src, size_t wn, mbstate_t *restrict st)
}
}
+ if (MB_CUR_MAX==1) {
+ if (!ws) return strlen((const char *)s);
+ for (;;) {
+ if (!wn) {
+ *src = (const void *)s;
+ return wn0;
+ }
+ if (!*s) break;
+ c = *s++;
+ *ws++ = CODEUNIT(c);
+ wn--;
+ }
+ *ws = 0;
+ *src = 0;
+ return wn0-wn;
+ }
+
if (!ws) for (;;) {
+#ifdef __GNUC__
+ typedef uint32_t __attribute__((__may_alias__)) w32;
if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
- while (!(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
+ while (!(( *(w32*)s | *(w32*)s-0x01010101) & 0x80808080)) {
s += 4;
wn -= 4;
}
}
+#endif
if (*s-1u < 0x7f) {
s++;
wn--;
wn--;
c = 0;
} else for (;;) {
- if (!wn) return wn0;
+ if (!wn) {
+ *src = (const void *)s;
+ return wn0;
+ }
+#ifdef __GNUC__
+ typedef uint32_t __attribute__((__may_alias__)) w32;
if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
- while (wn>=4 && !(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
+ while (wn>=5 && !(( *(w32*)s | *(w32*)s-0x01010101) & 0x80808080)) {
*ws++ = *s++;
*ws++ = *s++;
*ws++ = *s++;
wn -= 4;
}
}
+#endif
if (*s-1u < 0x7f) {
*ws++ = *s++;
wn--;