The big thing is locale dependent collation support.

Also added outdigit support and (legacy) YESSTR/NOSTR support.

2 files changed, 650 insertions, 39 deletions

diff --git a/libc/string/Makefile b/libc/string/Makefile
index 088058ebe..fe9b64382 100644
--- a/libc/string/Makefile
+++ b/libc/string/Makefile
@@ -33,13 +33,14 @@ MOBJW=  basename.o bcopy.o bzero.o dirname.o ffs.o memccpy.o memchr.o memcmp.o \
 	strspn.o strstr.o strtok.o strtok_r.o strerror.o _susv3_strerror_r.o \
 	_string_syserrmsgs.o _glibc_strerror_r.o \
 	_string_syssigmsgs.o sys_siglist.o strsignal.o psignal.o \
-	 __xpg_basename.o strlcat.o strlcpy.o sys_errlist.o # strcoll.o
+	 __xpg_basename.o strlcat.o strlcpy.o sys_errlist.o
 
 MOBJW2= wcscasecmp.o wcscat.o wcschrnul.o wcschr.o wcscmp.o wcscpy.o wcscspn.o \
 	wcsdup.o wcslen.o wcsncasecmp.o wcsncat.o wcsncmp.o wcsncpy.o \
 	wcsnlen.o wcspbrk.o wcsrchr.o wcsspn.o wcsstr.o wcstok.o wmemchr.o \
 	wmemcmp.o wmemcpy.o wmemmove.o wmempcpy.o wmemset.o wcpcpy.o wcpncpy.o \
-	wcsxfrm.o # wcscoll
+	__wcslcpy.o \
+	wcsxfrm.o strxfrm.o # wcscoll strcoll.o
 
 OBJS=$(MOBJ) $(MOBJ1) $(MOBJ2) $(MOBJW)
 
diff --git a/libc/string/wstring.c b/libc/string/wstring.c
index 531b1c9fd..c1ead6e00 100644
--- a/libc/string/wstring.c
+++ b/libc/string/wstring.c
@@ -26,6 +26,13 @@
  *
  *  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION! */
 
+/*  Dec 20, 2002
+ *
+ *  Initial test implementation of strcoll, strxfrm, wcscoll, and wcsxfrm.
+ *  The code needs to be cleaned up a good bit, but I'd like to see people
+ *  test it out.
+ */
+
 #define _STDIO_UTILITY
 #define _GNU_SOURCE
 #include <string.h>
@@ -36,11 +43,12 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <signal.h>
+#include <assert.h>
+#include <locale.h>
 
 #ifdef WANT_WIDE
 #include <wchar.h>
 #include <wctype.h>
-#include <locale.h>
 
 #define Wvoid			wchar_t
 #define Wchar			wchar_t
@@ -627,17 +635,14 @@ int Wmemcmp(const Wvoid *s1, const Wvoid *s2, size_t n)
 
 #ifdef L_strcmp
 
+#ifdef __LOCALE_C_ONLY
+#warning c only
 #ifdef L_wcscmp
-#ifdef __UCLIBC_MJN3_ONLY__
-#warning implement wcscoll and remove weak alias (or enable for C locale only)
-#endif
 weak_alias(wcscmp,wcscoll);
 #else  /* L_wcscmp */
-#ifdef __UCLIBC_MJN3_ONLY__
-#warning implement strcoll and remove weak alias (or enable for C locale only)
-#endif
 weak_alias(strcmp,strcoll);
 #endif /* L_wcscmp */
+#endif /* __LOCALE_C_ONLY */
 
 int Wstrcmp(register const Wchar *s1, register const Wchar *s2)
 {
@@ -661,23 +666,6 @@ int Wstrcmp(register const Wchar *s1, register const Wchar *s2)
 }
 #endif
 /**********************************************************************/
-#ifdef L_strcoll
-#error implement strcoll and remove weak_alias!!
-
-#if 0
-extern unsigned char *_ctype_collate;
-int strcoll(register const char *s1, const char *s2)
-{
-    int r;
-
-    while (!(r = (_ctype_collate[(int)(*s1++)]-_ctype_collate[(int)(*s2++)])));
-
-    return r;
-}
-#endif
-
-#endif
-/**********************************************************************/
 #ifdef L_wcsncmp
 #define L_strncmp
 #define Wstrncmp wcsncmp
@@ -713,11 +701,6 @@ int Wstrncmp(register const Wchar *s1, register const Wchar *s2, size_t n)
 
 #endif
 /**********************************************************************/
-#ifdef L_strxfrm
-#error implement strxfrm
-/* size_t strxfrm(char *dst, const char *src, size_t len); */
-#endif	
-/**********************************************************************/
 #ifdef L_wmemchr
 #define L_memchr
 #define Wmemchr wmemchr
@@ -1923,28 +1906,37 @@ size_t strlcat(register char *__restrict dst,
 
 #endif
 /**********************************************************************/
-#ifdef L_wcsxfrm
+#ifdef WANT_WIDE
+extern size_t __wcslcpy(wchar_t *__restrict dst,
+						const wchar_t *__restrict src,
+						size_t n);
+#endif
+
+
+#ifdef L___wcslcpy
 #define L_strlcpy
-#define Wstrlcpy wcsxfrm
+#define Wstrlcpy __wcslcpy
+#ifdef __LOCALE_C_ONLY
+weak_alias(__wcslcpy,wcsxfrm);
+#endif
 #endif
 
 #ifdef L_strlcpy
 
-#ifndef L_wcsxfrm
+#ifndef L___wcslcpy
 #define Wstrlcpy strlcpy
-#ifdef __UCLIBC_MJN3_ONLY__
-#warning implement wcscoll and remove weak alias (or enable for C locale only)
-#endif
+#ifdef __LOCALE_C_ONLY
 weak_alias(strlcpy,strxfrm);
 #endif
+#endif
 
 /* OpenBSD function:
  * Copy at most n-1 chars from src to dst and nul-terminate dst.
  * Returns strlen(src), so truncation occurred if the return value is >= n. */
 
 size_t Wstrlcpy(register Wchar *__restrict dst,
-				register const Wchar *__restrict src,
-				size_t n)
+				  register const Wchar *__restrict src,
+				  size_t n)
 {
 	const Wchar *src0 = src;
 	Wchar dummy[1];
@@ -2145,3 +2137,621 @@ void psignal(int signum, register const char *message)
 
 #endif
 /**********************************************************************/
+#ifndef __LOCALE_C_ONLY
+
+#ifdef L_strxfrm
+#ifndef WANT_WIDE
+#error WANT_WIDE should be defined for L_strxfrm
+#endif
+#ifdef L_wcsxfrm
+#error L_wcsxfrm already defined for L_strxfrm
+#endif
+
+#define wcscoll strcoll
+#define L_wcsxfrm
+#undef WANT_WIDE
+
+#undef Wvoid
+#undef Wchar
+#undef Wuchar
+#undef Wint
+
+#define Wchar char
+
+#endif /* L_strxfrm */
+
+
+
+#ifdef L_wcsxfrm
+
+#define CUR_COLLATE (&__global_locale.collate)
+
+#define MAX_PENDING 8
+
+typedef struct {
+	const Wchar *s;
+	const Wchar *eob;			/* end of backward */
+
+	__uwchar_t weight;
+	__uwchar_t ui_weight;		/* undefined or invalid */
+	int colitem;
+	int weightidx;
+	int rule;
+	size_t position;
+	/* should be wchar_t.  if wchar < 0 do EILSEQ? */
+	__uwchar_t *cip;
+	__uwchar_t ci_pending[MAX_PENDING];	/* nul-terminated */
+
+	char *back_buf;
+	char *bbe;					/* end of back_buf (actual last... not 1 past end) */
+	char *bp;					/* ptr into backbuf, NULL if not in backward mode */
+	char ibb[128];
+	size_t bb_size;
+
+	int ru_pushed;
+} col_state_t;
+
+
+#define WEIGHT_MASK	0x3fffU
+#define RULE_MASK	0xc000U
+
+#define RULE_FORWARD  (1 << 14)
+#define RULE_POSITION (1 << 15)
+
+#define UI_IDX		(WEIGHT_MASK-6)
+#define POSIT_IDX	(WEIGHT_MASK-5)
+#define RANGE_IDX	(WEIGHT_MASK-4)
+#define UNDEF_IDX	(WEIGHT_MASK-3)
+#define INVAL_IDX	(WEIGHT_MASK-2)
+#define DITTO_IDX   (WEIGHT_MASK-1)
+
+
+#undef TRACE
+#if 0
+#define TRACE(X)	printf##X
+#else
+#define TRACE(X)	((void)0)
+#endif
+
+static int lookup(wchar_t wc)
+{
+	unsigned int sc, n, i0, i1;
+
+	if (((__uwchar_t) wc) > 0xffffU) {
+		return 0;
+	}
+
+	sc = wc & CUR_COLLATE->ti_mask;
+	wc >>= CUR_COLLATE->ti_shift;
+	n = wc & CUR_COLLATE->ii_mask;
+	wc >>= CUR_COLLATE->ii_shift;
+
+	i0 = CUR_COLLATE->wcs2colidt_tbl[wc];
+	i0 <<= CUR_COLLATE->ii_shift;
+	i1 = CUR_COLLATE->wcs2colidt_tbl[CUR_COLLATE->ii_len + i0 + n];
+	i1 <<= CUR_COLLATE->ti_shift;
+	return CUR_COLLATE->wcs2colidt_tbl[CUR_COLLATE->ii_len + CUR_COLLATE->ti_len + i1 + sc];
+
+}
+
+static void init_col_state(col_state_t *cs, const Wchar *wcs)
+{
+	memset(cs, 0, sizeof(col_state_t));
+	cs->s = wcs;
+	cs->bp = cs->back_buf = cs->ibb;
+	cs->bb_size = 128;
+	cs->bbe = cs->back_buf + (cs->bb_size -1);
+}
+
+static void next_weight(col_state_t *cs, int pass)
+{
+	int r, w, ru, ri, popping_backup_stack;
+	ssize_t n;
+	const uint16_t *p;
+#ifdef WANT_WIDE
+#define WC (*cs->s)
+#define N (1)
+#else  /* WANT_WIDE */
+	mbstate_t mbstate;
+	wchar_t WC;
+	size_t n0, nx;
+#define N n0
+
+	mbstate.mask = 0;
+#endif /* WANT_WIDE */
+
+	do {
+
+		if (cs->ru_pushed) {
+			ru = cs->ru_pushed;
+			TRACE(("ru_pushed = %d\n", ru));
+			cs->ru_pushed = 0;
+			goto POSITION_SKIP;
+		}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning should we walk pendings backwards?
+#endif
+		if (cs->cip) {			/* possible pending weight */
+			if ((r = *(cs->cip++)) == 0) {
+				cs->cip = NULL;
+				continue;
+			}
+			cs->weightidx = r & WEIGHT_MASK;
+			assert(cs->weightidx);
+/* 			assert(cs->weightidx != WEIGHT_MASK); */
+		} else {				/* get the next collation item from the string */
+			TRACE(("clearing popping flag\n"));
+			popping_backup_stack = 0;
+
+		IGNORE_LOOP:
+			/* keep first pos as 0 for a sentinal */
+			if (*cs->bp) {				/* pending backward chars */
+			POP_BACKUP:
+				popping_backup_stack = 1;
+				TRACE(("setting popping flag\n"));
+				n = 0;
+				if (*cs->bp > 0) {		/* singles pending */
+					cs->s -= 1;
+					if ((*cs->bp -= 1) == 0) {
+						cs->bp -= 1;
+					}
+				} else {				/* last was a multi */
+					cs->s += *cs->bp;
+					cs->bp -= 1;
+				}
+			} else if (!*cs->s) { /* not in backward mode and end of string */
+				cs->weight = 0;
+				return;
+			} else {
+				cs->position += 1;
+			}
+
+		BACK_LOOP:
+#ifdef WANT_WIDE
+			n = 1;
+			cs->colitem = r = lookup(*cs->s);
+#else  /* WANT_WIDE */
+			n = n0 = mbrtowc(&WC, cs->s, SIZE_MAX, &mbstate);
+			if (n < 0) {
+				__set_errno(EILSEQ);
+				cs->weight = 0;
+				return;
+			}
+			cs->colitem = r = lookup(WC);
+#endif /* WANT_WIDE */
+
+			TRACE((" r=%d WC=%#lx\n", r, (unsigned long)(WC)));
+
+			if (r > CUR_COLLATE->max_col_index) { /* starting char for one or more sequences */
+				p = CUR_COLLATE->multistart_tbl;
+				p += p[r-CUR_COLLATE->max_col_index -1];
+				do {
+					n = N;
+					r = *p++;
+					do {
+						if (!*p) {		/* found it */
+							cs->colitem = r;
+							TRACE(("    found multi %d\n", n));
+							goto FOUND;
+						}
+#ifdef WANT_WIDE
+						/* the lookup check here is safe since we're assured that *p is a valid colidx */
+						if (!cs->s[n] || (lookup(cs->s[n]) != *p)) {
+							do {} while (*p++);
+							break;
+						}
+						++p;
+						++n;
+#else  /* WANT_WIDE */
+						if (cs->s[n]) {
+							nx = mbrtowc(&WC, cs->s + n, SIZE_MAX, &mbstate);
+							if (nx < 0) {
+								__set_errno(EILSEQ);
+								cs->weight = 0;
+								return;
+							}
+						}
+						if (!cs->s[n] || (lookup(WC) != *p)) {
+							do {} while (*p++);
+							break;
+						}
+						++p;
+						n += nx;
+#endif /* WANT_WIDE */
+					} while (1);
+				} while (1);
+			} else if (r == 0) {		/* illegal, undefined, or part of a range */
+				if ((CUR_COLLATE->range_count)
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning .. need to introduce range as a collating item?
+#endif
+					&& (((__uwchar_t)(WC - CUR_COLLATE->range_low)) <= CUR_COLLATE->range_count)
+					) {					/* part of a range */
+					/* Note: cs->colitem = 0 already. */
+					TRACE(("    found range\n"));
+					ru = CUR_COLLATE->ruletable[CUR_COLLATE->range_rule_offset*CUR_COLLATE->MAX_WEIGHTS + pass];
+					assert((ru & WEIGHT_MASK) != DITTO_IDX);
+					if ((ru & WEIGHT_MASK) == WEIGHT_MASK) {
+						ru = (ru & RULE_MASK) | RANGE_IDX;
+						cs->weight = CUR_COLLATE->range_base_weight + (WC - CUR_COLLATE->range_low);
+					}
+					goto RANGE_SKIP_TO;
+				} else if (((__uwchar_t)(WC)) <= 0x7fffffffUL) { /* legal but undefined */
+				UNDEFINED:
+					/* Note: cs->colitem = 0 already. */
+					ri = CUR_COLLATE->undefined_idx;
+					assert(ri != 0); /* implicit undefined isn't supported */
+
+					TRACE(("    found explicit UNDEFINED\n"));
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning right now single weight locales do not support ..
+#endif
+					if (CUR_COLLATE->num_weights == 1) {
+						TRACE(("    single weight UNDEFINED\n"));
+						cs->weightidx = RANGE_IDX;
+						cs->weight = ri;
+						cs->s += n;
+						goto PROCESS_WEIGHT;
+					}
+
+					ri = CUR_COLLATE->index2ruleidx[ri - 1];
+					ru = CUR_COLLATE->ruletable[ri * CUR_COLLATE->MAX_WEIGHTS + pass];
+					assert((ru & WEIGHT_MASK) != WEIGHT_MASK); /* TODO: handle ".." */
+					if ((ru & WEIGHT_MASK) == DITTO_IDX) {
+						cs->colitem = CUR_COLLATE->undefined_idx;
+					}
+					goto RANGE_SKIP_TO;
+				} else {		/* illegal */
+					TRACE(("    found illegal\n"));
+					__set_errno(EINVAL);
+					/* We put all illegals in the same equiv class with maximal weight,
+					 * and ignore them after the first pass. */
+					if (pass > 0) {
+						cs->s += n;
+						goto IGNORE_LOOP;
+					}
+					ru = (RULE_FORWARD | RANGE_IDX);
+					cs->weight = 0xffffU;
+					goto RANGE_SKIP_TO;
+				}
+			} else if (CUR_COLLATE->num_weights == 1) {
+				TRACE(("    single weight\n"));
+				cs->weightidx = RANGE_IDX;
+				cs->weight = cs->colitem;
+				cs->s += n;
+				goto PROCESS_WEIGHT;
+			} else {
+				TRACE(("    normal\n"));
+			}
+
+			/* if we get here, it is a normal char either singlely weighted, undefined, or in a range */
+		FOUND:
+			ri = CUR_COLLATE->index2ruleidx[cs->colitem - 1];
+			TRACE((" ri=%d ", ri));
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning make sure this is correct
+#endif
+			if (!ri) {
+				TRACE(("NOT IN THIS LOCALE\n"));
+				goto UNDEFINED;
+			}
+			ru = CUR_COLLATE->ruletable[ri * CUR_COLLATE->MAX_WEIGHTS + pass];
+
+		RANGE_SKIP_TO:
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning ignoreables probably should not interrupt backwards processing, but this is wrong
+#endif
+/* 			if (!(ru & WEIGHT_MASK)) { */
+/* 				TRACE(("IGNORE\n")); */
+/* 				cs->s += n; */
+/* 				continue; */
+/* 			} */
+
+
+			TRACE((" rule = %#x  weight = %#x  popping = %d  s = %p  eob = %p\n",
+				   ru & RULE_MASK, ru & WEIGHT_MASK, popping_backup_stack,
+				   cs->s, cs->eob));
+			/* now we need to check if we're going backwards... */
+
+			if (!popping_backup_stack) {
+				if (!(ru & RULE_MASK)) { /* backward */
+					TRACE(("backwards\n"));
+					assert(cs->bp <= cs->bbe);
+					if (cs->bp == cs->bbe) {
+						if (cs->back_buf == cs->ibb) { /* was using internal buffer */
+							cs->bp = malloc(cs->bb_size + 128);
+							if (!cs->bp) {
+								__set_errno(ENOMEM);
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning what to do here?
+#endif
+								cs->weight = 0;
+								return;
+							}
+							memcpy(cs->bp, cs->back_buf, cs->bb_size);
+
+						} else {
+							cs->bp = realloc(cs->back_buf, cs->bb_size + 128);
+							if (!cs->bp) {
+								__set_errno(ENOMEM);
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning what to do here?
+#endif
+								cs->weight = 0;
+								return;
+							}
+						}
+						cs->bb_size += 128;
+						cs->bbe = cs->bp + (cs->bbe - cs->back_buf);
+						cs->back_buf = cs->bp;
+						cs->bp = cs->bbe;
+
+					}
+					if (n==1) {			/* single char */
+						if (*cs->bp && (((unsigned char)(*cs->bp)) < CHAR_MAX)) {
+							*cs->bp += 1; /* increment last single's count */
+						} else {	  /* last was a multi, or just starting */
+							if (!cs->bp) {
+								cs->bp = cs->back_buf;
+							} else {
+								assert(cs->bp < cs->bbe);
+								++cs->bp;
+							}
+							*cs->bp = 1;
+						}
+					} else {			/* multichar */
+						assert(n>1);
+						assert(cs->bp < cs->bbe);
+						*++cs->bp = -n;
+					}
+					cs->s += n;
+					if (*cs->s) {
+						goto BACK_LOOP;
+					}
+					/* end-of-string so start popping */
+					cs->eob = cs->s;
+					TRACE(("popping\n"));
+					goto POP_BACKUP;
+				} else if (*cs->bp) { /* was going backward but this element isn't */
+					/* discard current and use previous backward element */
+					assert(!cs->cip);
+					cs->eob = cs->s;
+					TRACE(("popping\n"));
+					goto POP_BACKUP;
+				} else {				/* was and still going forward */
+					TRACE(("forwards\n"));
+					if ((ru & (RULE_POSITION|WEIGHT_MASK)) > RULE_POSITION) {
+						assert(ru & WEIGHT_MASK);
+						cs->ru_pushed = ru;
+						cs->weight = cs->position;
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning devel code
+#endif
+						cs->position = 0;	/* reset to reduce size for strcoll? */
+						cs->s += n;
+						cs->weightidx = RANGE_IDX;
+						goto PROCESS_WEIGHT;
+					}
+				}
+			} else {					/* popping backwards stack */
+				TRACE(("popping (continued)\n"));
+				if (!*cs->bp) {
+					cs->s = cs->eob;
+				}
+				cs->s -= n;
+			}
+
+			cs->s += n;
+		POSITION_SKIP:
+			cs->weightidx = ru & WEIGHT_MASK;
+			cs->rule = ru & RULE_MASK;
+		}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning for pending we only want the weight... _not_ the rule
+#endif
+		if (!cs->weightidx) {	/* ignore */
+			continue;
+		}
+
+	PROCESS_WEIGHT:
+		assert(cs->weightidx);
+
+
+		if (((unsigned int)(cs->weightidx - UI_IDX)) <= (INVAL_IDX-UI_IDX)) {
+			if (cs->weightidx == UI_IDX) {
+				cs->weight = cs->ui_weight;
+			}
+			return;
+		}
+
+		assert(cs->weightidx != WEIGHT_MASK);
+		if (cs->weightidx == DITTO_IDX) { /* want the weight of the current collating item */
+			TRACE(("doing ditto\n"));
+			w = CUR_COLLATE->index2weight[cs->colitem -1];
+		} else if (cs->weightidx <= CUR_COLLATE->max_col_index) { /* normal */
+			TRACE(("doing normal\n"));
+			w = CUR_COLLATE->index2weight[cs->weightidx -1];
+		} else {				/* a string */
+			TRACE(("doing string\n"));
+			assert(!(cs->weightidx & RULE_MASK));
+			/* note: iso14561 allows null string here */
+			p = CUR_COLLATE->weightstr + (cs->weightidx - (CUR_COLLATE->max_col_index + 2));
+			if (*p & WEIGHT_MASK) {
+				r = 0;
+				do {
+					assert(r < MAX_PENDING);
+					cs->ci_pending[r++] = *p++;
+				} while (*p & WEIGHT_MASK);
+				cs->cip = cs->ci_pending;
+			}
+			continue;
+		}
+
+		cs->weight = w;
+		return;
+	} while (1);
+}
+
+int wcscoll (const Wchar *s0, const Wchar *s1)
+{
+	col_state_t ws[2];
+	int pass;
+
+	if (!CUR_COLLATE->num_weights) { /* C locale */
+#ifdef WANT_WIDE
+		return wcscmp(s0, s1);
+#else  /* WANT_WIDE */
+		return strcmp(s0, s1);
+#endif /* WANT_WIDE */
+	}
+
+	pass = 0;
+	do {						/* loop through the weights levels */
+		init_col_state(ws, s0);
+		init_col_state(ws+1, s1);
+		do {					/* loop through the strings */
+			/* for each string, get the next weight */
+			next_weight(ws, pass);
+			next_weight(ws+1, pass);
+			TRACE(("w0=%lu  w1=%lu\n",
+				   (unsigned long) ws[0].weight,
+				   (unsigned long) ws[1].weight));
+
+			if (ws[0].weight != ws[1].weight) {
+				return ws[0].weight - ws[1].weight;
+			}
+		} while (ws[0].weight);
+	} while (++pass < CUR_COLLATE->num_weights);
+
+	return 0;
+}
+
+#ifdef WANT_WIDE
+
+size_t wcsxfrm(wchar_t *__restrict ws1, const wchar_t *__restrict ws2, size_t n)
+{
+	col_state_t cs;
+	size_t count;
+	int pass;
+
+	if (!CUR_COLLATE->num_weights) { /* C locale */
+		return __wcslcpy(ws1, ws2, n);
+	}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning handle empty string as a special case
+#endif
+
+	count = pass = 0;
+	do {						/* loop through the weights levels */
+		init_col_state(&cs, ws2);
+		do {					/* loop through the string */
+			next_weight(&cs, pass);
+			TRACE(("weight=%lu (%#lx)\n", (unsigned long) cs.weight, (unsigned long) cs.weight));
+			if (count < n) {
+				ws1[count] = cs.weight +1;
+			}
+			++count;
+			TRACE(("--------------------------------------------\n"));
+		} while (cs.weight);
+		if (count <= n) {		/* overwrite the trailing 0 end-of-pass marker */
+			ws1[count-1] = 1;
+		}
+		TRACE(("--------------------  pass %d  --------------------\n", pass));
+	} while (++pass < CUR_COLLATE->num_weights);
+	if (count <= n) {			/* oops... change it back */
+		ws1[count-1] = 0;
+	}
+	return count-1;
+}
+
+#else  /* WANT_WIDE */
+
+static const unsigned long bound[] = {
+	1UL << 7,
+	1UL << 11,
+	1UL << 16,
+	1UL << 21,
+	1UL << 26,
+};
+
+static unsigned char first[] = {
+	0x0, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc
+};
+
+/* Use an extension of UTF-8 to store a 32 bit val in max 6 bytes. */
+
+static size_t store(unsigned char *s, size_t count, size_t n, __uwchar_t weight)
+{
+	int i, r;
+
+	i = 0;
+	do {
+		if (weight < bound[i]) {
+			break;
+		}
+	} while (++i < sizeof(bound)/sizeof(bound[0]));
+
+	r = i+1;
+	if (i + count < n) {
+		s += count;
+		s[0] = first[i];
+		while (i) {
+			s[i] = 0x80 | (weight & 0x3f);
+			weight >>= 6;
+			--i;
+		}
+		s[0] |= weight;
+	}
+
+	return r;
+}
+
+size_t strxfrm(char *__restrict ws1, const char *__restrict ws2, size_t n)
+{
+	col_state_t cs;
+	size_t count, inc;
+	int pass;
+
+	if (!CUR_COLLATE->num_weights) { /* C locale */
+		return strlcpy(ws1, ws2, n);
+	}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning handle empty string as a special case
+#endif
+
+	inc = count = pass = 0;
+	do {						/* loop through the weights levels */
+		init_col_state(&cs, ws2);
+		do {					/* loop through the string */
+			next_weight(&cs, pass);
+			TRACE(("weight=%lu (%#lx)\n", (unsigned long) cs.weight, (unsigned long) cs.weight));
+			inc = store((unsigned char *)ws1, count, n, cs.weight + 1);
+			count += inc;
+			TRACE(("--------------------------------------------\n"));
+		} while (cs.weight);
+		/* overwrite the trailing 0 end-of-pass marker */
+		assert(inc == 1);
+		if (count <= n) {
+			ws1[count-1] = 1;
+		}
+		TRACE(("--------------------  pass %d  --------------------\n", pass));
+	} while (++pass < CUR_COLLATE->num_weights);
+	if (count <= n) {			/* oops... change it back */
+		ws1[count-1] = 0;
+	}
+	return count-1;
+}
+
+
+#endif /* WANT_WIDE */
+
+#endif /* wcscoll */
+
+#endif /* __LOCALE_C_ONLY */
+/**********************************************************************/
+