#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/string/wcscoll.c,v 1.3 2004/04/07 09:47:56 tjr Exp $");
+#include "xlocale_private.h"
+
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "collate.h"
-static char *__mbsdup(const wchar_t *);
+#define NOTFORWARD (DIRECTIVE_BACKWARD | DIRECTIVE_POSITION)
-/*
- * Placeholder implementation of wcscoll(). Attempts to use the single-byte
- * collation ordering where possible, and falls back on wcscmp() in locales
- * with extended character sets.
- */
int
-wcscoll(const wchar_t *ws1, const wchar_t *ws2)
+wcscoll_l(const wchar_t *ws1, const wchar_t *ws2, locale_t loc)
{
- char *mbs1, *mbs2;
- int diff, sverrno;
+ int sverrno;
+ int len, len2, prim, prim2, sec, sec2, ret, ret2;
+ const wchar_t *t, *t2;
+ wchar_t *tt = NULL, *tt2 = NULL;
+ wchar_t *tr = NULL, *tr2 = NULL;
+ struct __collate_st_info *info;
- if (__collate_load_error || MB_CUR_MAX > 1)
+ NORMALIZE_LOCALE(loc);
+ if (loc->__collate_load_error)
/*
- * Locale has no special collating order, could not be
- * loaded, or has an extended character set; do a fast binary
- * comparison.
+ * Locale has no special collating order or could not be
+ * loaded, do a fast binary comparison.
*/
return (wcscmp(ws1, ws2));
- if ((mbs1 = __mbsdup(ws1)) == NULL || (mbs2 = __mbsdup(ws2)) == NULL) {
- /*
- * Out of memory or illegal wide chars; fall back to wcscmp()
- * but leave errno indicating the error. Callers that don't
- * check for error will get a reasonable but often slightly
- * incorrect result.
- */
- sverrno = errno;
- free(mbs1);
- errno = sverrno;
- return (wcscmp(ws1, ws2));
+ info = &loc->__lc_collate->__info;
+ len = len2 = 1;
+ ret = ret2 = 0;
+
+ if ((info->directive[0] & NOTFORWARD) ||
+ (info->directive[1] & NOTFORWARD) ||
+ (!(info->flags && COLLATE_SUBST_DUP) &&
+ (info->subst_count[0] > 0 || info->subst_count[1] > 0))) {
+ int direc, pass;
+ for(pass = 0; pass < info->directive_count; pass++) {
+ direc = info->directive[pass];
+ if (pass == 0 || !(info->flags & COLLATE_SUBST_DUP)) {
+ free(tt);
+ tt = __collate_substitute(ws1, pass, loc);
+ free(tt2);
+ tt2 = tt ? __collate_substitute(ws2, pass, loc) : NULL;
+ }
+ if (direc & DIRECTIVE_BACKWARD) {
+ wchar_t *bp, *fp, c;
+ tr = __collate_wcsdup(tt ? tt : ws1);
+ bp = tr;
+ fp = tr + wcslen(tr) - 1;
+ while(bp < fp) {
+ c = *bp;
+ *bp++ = *fp;
+ *fp-- = c;
+ }
+ tr2 = __collate_wcsdup(tt2 ? tt2 : ws2);
+ bp = tr2;
+ fp = tr2 + wcslen(tr2) - 1;
+ while(bp < fp) {
+ c = *bp;
+ *bp++ = *fp;
+ *fp-- = c;
+ }
+ t = (const wchar_t *)tr;
+ t2 = (const wchar_t *)tr2;
+ } else if (tt) {
+ t = (const wchar_t *)tt;
+ t2 = (const wchar_t *)tt2;
+ } else {
+ t = (const wchar_t *)ws1;
+ t2 = (const wchar_t *)ws2;
+ }
+ if(direc & DIRECTIVE_POSITION) {
+ while(*t && *t2) {
+ prim = prim2 = 0;
+ __collate_lookup_which(t, &len, &prim, pass, loc);
+ if (prim <= 0) {
+ if (prim < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ prim = COLLATE_MAX_PRIORITY;
+ }
+ __collate_lookup_which(t2, &len2, &prim2, pass, loc);
+ if (prim2 <= 0) {
+ if (prim2 < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ prim2 = COLLATE_MAX_PRIORITY;
+ }
+ if(prim != prim2) {
+ ret = prim - prim2;
+ goto end;
+ }
+ t += len;
+ t2 += len2;
+ }
+ } else {
+ while(*t && *t2) {
+ prim = prim2 = 0;
+ while(*t) {
+ __collate_lookup_which(t, &len, &prim, pass, loc);
+ if(prim > 0)
+ break;
+ if (prim < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ t += len;
+ }
+ while(*t2) {
+ __collate_lookup_which(t2, &len2, &prim2, pass, loc);
+ if(prim2 > 0)
+ break;
+ if (prim2 < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ t2 += len2;
+ }
+ if(!prim || !prim2)
+ break;
+ if(prim != prim2) {
+ ret = prim - prim2;
+ goto end;
+ }
+ t += len;
+ t2 += len2;
+ }
+ }
+ if(!*t) {
+ if(*t2) {
+ ret = -(int)*t2;
+ goto end;
+ }
+ } else {
+ ret = *t;
+ goto end;
+ }
+ }
+ ret = 0;
+ goto end;
}
- diff = strcoll(mbs1, mbs2);
+ /* optimized common case: order_start forward;forward and duplicate
+ * (or no) substitute tables */
+ tt = __collate_substitute(ws1, 0, loc);
+ if (tt == NULL) {
+ tt2 = NULL;
+ t = (const wchar_t *)ws1;
+ t2 = (const wchar_t *)ws2;
+ } else {
+ tt2 = __collate_substitute(ws2, 0, loc);
+ t = (const wchar_t *)tt;
+ t2 = (const wchar_t *)tt2;
+ }
+ while(*t && *t2) {
+ prim = prim2 = 0;
+ while(*t) {
+ __collate_lookup_l(t, &len, &prim, &sec, loc);
+ if (prim > 0)
+ break;
+ if (prim < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ t += len;
+ }
+ while(*t2) {
+ __collate_lookup_l(t2, &len2, &prim2, &sec2, loc);
+ if (prim2 > 0)
+ break;
+ if (prim2 < 0) {
+ errno = EINVAL;
+ ret = -1;
+ goto end;
+ }
+ t2 += len2;
+ }
+ if(!prim || !prim2)
+ break;
+ if(prim != prim2) {
+ ret = prim - prim2;
+ goto end;
+ }
+ if(!ret2)
+ ret2 = sec - sec2;
+ t += len;
+ t2 += len2;
+ }
+ if(!*t && *t2)
+ ret = -(int)*t2;
+ else if(*t && !*t2)
+ ret = *t;
+ else if(!*t && !*t2)
+ ret = ret2;
+ end:
sverrno = errno;
- free(mbs1);
- free(mbs2);
+ free(tt);
+ free(tt2);
+ free(tr);
+ free(tr2);
errno = sverrno;
- return (diff);
+ return ret;
}
-static char *
-__mbsdup(const wchar_t *ws)
+int
+wcscoll(const wchar_t *ws1, const wchar_t *ws2)
{
- static const mbstate_t initial;
- mbstate_t st;
- const wchar_t *wcp;
- size_t len;
- char *mbs;
-
- wcp = ws;
- st = initial;
- if ((len = wcsrtombs(NULL, &wcp, 0, &st)) == (size_t)-1)
- return (NULL);
- if ((mbs = malloc(len + 1)) == NULL)
- return (NULL);
- st = initial;
- wcsrtombs(mbs, &ws, len + 1, &st);
-
- return (mbs);
+ return wcscoll_l(ws1, ws2, __current_locale());
}
projects / apple / libc.git / blobdiff