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gui-win32: delete utf-16 routines, just use WideCharToMultiByte()/MultiByteToWideChar() kernel32 functions

--- a/gui-win32/Makefile

+++ b/gui-win32/Makefile

@@ -4,7 +4,6 @@

 OFILES=\

 	screen.$O\

-	r16.$O

 default: $(LIB)

 $(LIB): $(OFILES)

--- a/gui-win32/r16.c

+++ /dev/null

@@ -1,186 +1,0 @@

-#define _WIN32_WINNT 0x0500

-#include <windows.h>

-

-#include "u.h"

-#include "lib.h"

-#include "r16.h"

-

-#define Bit(i) (7-(i))

-/* N 0's preceded by i 1's, T(Bit(2)) is 1100 0000 */

-#define T(i) (((1 << (Bit(i)+1))-1) ^ 0xFF)

-/* 0000 0000 0000 0111 1111 1111 */

-#define	RuneX(i) ((1 << (Bit(i) + ((i)-1)*Bitx))-1)

-

-enum

-{

-	Bitx	= Bit(1),

-

-	Tx	= T(1),			/* 1000 0000 */

-	Rune1 = (1<<(Bit(0)+0*Bitx))-1,	/* 0000 0000 0000 0000 0111 1111 */

-

-	Maskx	= (1<<Bitx)-1,		/* 0011 1111 */

-	Testx	= Maskx ^ 0xFF,		/* 1100 0000 */

-

-	SurrogateMax	= 0xDFFF,

-	HiSurrogate		= 0xD800,

-	LoSurrogate		= 0xDC00,

-

-	Bad	= Runeerror,

-};

-

-Rune16*

-runes16dup(Rune16 *r)

-{

-	int n;

-	Rune16 *s;

-

-	n = runes16len(r) + 1;

-	s = calloc(n, sizeof(Rune16));

-	memcpy(s, r, n * sizeof(Rune16));

-	return s;

-}

-

-int

-runes16len(Rune16 *r)

-{

-	int n;

-

-	n = 0;

-	while(*r++ != 0)

-		n++;

-	return n;

-}

-

-char*

-runes16toutf(char *p, Rune16 *r, int nc)

-{

-	char *op, *ep;

-	int n, c;

-	Rune rc;

-

-	op = p;

-	ep = p + nc;

-	while(c = *r++){

-		n = 1;

-		if(c >= Runeself)

-			n = runelen(c);

-		if(p + n >= ep)

-			break;

-		if(c < Runeself){

-			*p++ = c;

-			continue;

-		}

-		rc = c;

-		if(c >= LoSurrogate && c <= SurrogateMax)

-			rc = Bad;

-		else if(c >= HiSurrogate && c <= 0xDBFF){ /* decode a surrogate pair properly */

-			if(p + n+1 >= ep)

-				rc = Bad;

-			else if((c = *r) >= LoSurrogate && c <= SurrogateMax){

-				rc = 0x10000 | (*(r-1) - HiSurrogate) << 10 | (c - LoSurrogate);

-				r++;

-			}else

-				rc = Bad;

-		}

-		p += runetochar(p, &rc);

-	}

-	*p = '\0';

-	return op;

-}

-

-int

-rune16nlen(Rune16 *r, int nrune)

-{

-	int nb, i;

-	Rune c;

-

-	nb = 0;

-	while(nrune--) {

-		c = *r++;

-		if(c <= Rune1){

-			nb++;

-		} else {

-			for(i = 2; i < UTFmax + 1; i++)

-				if(c <= RuneX(i) || i == UTFmax){

-					nb += i;

-					break;

-				}

-		}

-	}

-	return nb;

-}

-

-Rune16*

-utftorunes16(Rune16 *r, char *p, int nc)

-{

-	Rune16 *or, *er;

-	Rune rc;

-

-	or = r;

-	er = r + nc;

-	while(*p != '\0' && r + 1 < er){

-		p += chartorune(&rc, p);

-		if(rc >= 0x10000){ /* got to encode it in a surrogate pair */

-			rc -= 0x10000;

-			*r++ = (rc >> 10)+HiSurrogate;

-			*r++ = (rc & 0x3FF)+LoSurrogate;

-		}else

-			*r++ = rc;

-	}

-	*r = '\0';

-	return or;

-}

-

-int

-runes16cmp(Rune16 *s1, Rune16 *s2)

-{

-	Rune16 r1, r2;

-

-	for(;;) {

-		r1 = *s1++;

-		r2 = *s2++;

-		if(r1 != r2) {

-			if(r1 > r2)

-				return 1;

-			return -1;

-		}

-		if(r1 == 0)

-			return 0;

-	}

-}

-

-wchar_t *

-widen(char *s)

-{

-	int n;

-	wchar_t *ws;

-

-	n = utflen(s) + 1;

-	ws = calloc(n, sizeof(wchar_t));

-	utftorunes16(ws, s, n);

-	return ws;

-}

-

-

-char *

-narrowen(wchar_t *ws)

-{

-	char *s;

-	int n;

-

-	n = widebytes(ws);

-	s = malloc(n);

-	runes16toutf(s, ws, n);

-	return s;

-}

-

-

-int

-widebytes(wchar_t *ws)

-{

-	int n = 0;

-

-	while(*ws)

-		n += runelen(*ws++);

-	return n+1;

-}

--- a/gui-win32/r16.h

+++ /dev/null

@@ -1,11 +1,0 @@

-typedef unsigned short Rune16;

-

-wchar_t	*widen(char *s);

-char		*narrowen(wchar_t *ws);

-int		widebytes(wchar_t *ws);

-int		runes16len(Rune16*);

-int		rune16nlen(Rune16*, int);

-Rune16*	runes16dup(Rune16*);

-Rune16*	utftorunes16(Rune16*, char*, int);

-char*	runes16toutf(char*, Rune16*, int);

-int		runes16cmp(Rune16*, Rune16*);

--- a/gui-win32/screen.c

+++ b/gui-win32/screen.c

@@ -14,7 +14,6 @@

 #include <memdraw.h>

 #include "screen.h"

 #include "keyboard.h"

-#include "r16.h"

 Memimage	*gscreen;

 Screeninfo	screen;

@@ -557,14 +556,14 @@

 char*

 clipreadunicode(HANDLE h)

 {

-	Rune16 *p;

+	wchar_t *p;

 	int n;

 	char *q;

 	p = GlobalLock(h);

-	n = rune16nlen(p, runes16len(p)+1);

-	q = malloc(n);

-	runes16toutf(q, p, n);

+	n = WideCharToMultiByte(CP_UTF8, 0, p, -1, 0, 0, 0, 0);

+	q = malloc(n+1);

+	WideCharToMultiByte(CP_UTF8, 0, p, -1, q, n, 0, 0);

 	GlobalUnlock(h);

 	return q;

@@ -642,7 +641,7 @@

 {

 	HANDLE h;

 	char *p;

-	Rune16 *rp;

+	wchar_t *rp;

 	char *crbuf;

 	int n;

@@ -659,11 +658,11 @@

 	crbuf = addcr(buf, &n);

-	h = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE, (n+1)*sizeof(Rune));

+	h = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE, (n+1)*sizeof(rp[0]));

 	if(h == NULL)

 		panic("out of memory");

 	rp = GlobalLock(h);

-	utftorunes16(rp, crbuf, n+1);

+	MultiByteToWideChar(CP_UTF8, 0, crbuf, -1, rp, n+1);

 	GlobalUnlock(h);

 	SetClipboardData(CF_UNICODETEXT, h);