From a0583cf2560feff2dcfcccb52279569bcf27fa5e Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Sun, 13 Sep 2009 17:43:37 -0400
Subject: tcs: update for 32-bit Rune

http://codereview.appspot.com/117063
---
 src/cmd/tcs/plan9.h |  24 +--------
 src/cmd/tcs/utf.c   | 152 ++--------------------------------------------------
 2 files changed, 4 insertions(+), 172 deletions(-)

(limited to 'src/cmd/tcs')

diff --git a/src/cmd/tcs/plan9.h b/src/cmd/tcs/plan9.h
index 4d002cb0..f9366ec4 100644
--- a/src/cmd/tcs/plan9.h
+++ b/src/cmd/tcs/plan9.h
@@ -1,23 +1 @@
-typedef unsigned short Rune;		/* 16 bits */
-typedef unsigned char uchar;
-#define		Runeerror	0x80	/* decoding error in UTF */
-#define		Runeself	0x80	/* rune and UTF sequences are the same (<) */
-#define		UTFmax		6	/* maximum bytes per rune */
-
-/*
-	plan 9 argument parsing
-*/
-#define	ARGBEGIN	for((argv0? 0: (argv0= *argv)),argv++,argc--;\
-			    argv[0] && argv[0][0]=='-' && argv[0][1];\
-			    argc--, argv++) {\
-				char *_args, *_argt, _argc;\
-				_args = &argv[0][1];\
-				if(_args[0]=='-' && _args[1]==0){\
-					argc--; argv++; break;\
-				}\
-				_argc=0;while(*_args) switch(_argc= *_args++)
-#define	ARGEND		}
-#define	ARGF()		(_argt=_args, _args="",\
-				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
-#define	ARGC()		_argc
-extern char *argv0;
+Compatibility file removed; must compile using Plan 9 definitions.
diff --git a/src/cmd/tcs/utf.c b/src/cmd/tcs/utf.c
index 4045332d..3970e596 100644
--- a/src/cmd/tcs/utf.c
+++ b/src/cmd/tcs/utf.c
@@ -139,168 +139,22 @@ isoutf_out(Rune *base, int n, long *notused)
 }
 
 
-enum
-{
-	Char1	= Runeself,	Rune1	= Runeself,
-	Char21	= 0xA1,		Rune21	= 0x0100,
-	Char22	= 0xF6,		Rune22	= 0x4016,
-	Char3	= 0xFC,		Rune3	= 0x10000,	/* really 0x38E2E */
-	Esc	= 0xBE,		Bad	= Runeerror
-};
-
-static	uchar	U[256];
-static	uchar	T[256];
-
-static
-void
-mktable(void)
-{
-	int i, u;
-
-	for(i=0; i<256; i++) {
-		u = i + (0x5E - 0xA0);
-		if(i < 0xA0)
-			u = i + (0xDF - 0x7F);
-		if(i < 0x7F)
-			u = i + (0x00 - 0x21);
-		if(i < 0x21)
-			u = i + (0xBE - 0x00);
-		U[i] = u;
-		T[u] = i;
-	}
-}
-
 int
 isochartorune(Rune *rune, char *str)
 {
-	int c, c1, c2;
-	long l;
-
-	if(U[0] == 0)
-		mktable();
-
-	/*
-	 * one character sequence
-	 *	00000-0009F => 00-9F
-	 */
-	c = *(uchar*)str;
-	if(c < Char1) {
-		*rune = c;
-		return 1;
-	}
-
-	/*
-	 * two character sequence
-	 *	000A0-000FF => A0; A0-FF
-	 */
-	c1 = *(uchar*)(str+1);
-	if(c < Char21) {
-		if(c1 >= Rune1 && c1 < Rune21) {
-			*rune = c1;
-			return 2;
-		}
-		goto bad;
-	}
-
-	/*
-	 * two character sequence
-	 *	00100-04015 => A1-F5; 21-7E/A0-FF
-	 */
-	c1 = U[c1];
-	if(c1 >= Esc)
-		goto bad;
-	if(c < Char22) {
-		*rune =  (c-Char21)*Esc + c1 + Rune21;
-		return 2;
-	}
-
-	/*
-	 * three character sequence
-	 *	04016-38E2D => A6-FB; 21-7E/A0-FF
-	 */
-	c2 = U[*(uchar*)(str+2)];
-	if(c2 >= Esc)
-		goto bad;
-	if(c < Char3) {
-		l = (c-Char22)*Esc*Esc + c1*Esc + c2 + Rune22;
-		if(l >= Rune3)
-			goto bad;
-		*rune = l;
-		return 3;
-	}
-
-	/*
-	 * bad decoding
-	 */
-bad:
-	*rune = Bad;
-	return 1;
+	return chartorune(rune, str);
 }
 
 int
 runetoisoutf(char *str, Rune *rune)
 {
-	long c;
-
-	if(T[0] == 0)
-		mktable();
-
-	/*
-	 * one character sequence
-	 *	00000-0009F => 00-9F
-	 */
-	c = *rune;
-	if(c < Rune1) {
-		str[0] = c;
-		return 1;
-	}
-
-	/*
-	 * two character sequence
-	 *	000A0-000FF => A0; A0-FF
-	 */
-	if(c < Rune21) {
-		str[0] = (char)Char1;
-		str[1] = c;
-		return 2;
-	}
-
-	/*
-	 * two character sequence
-	 *	00100-04015 => A1-F5; 21-7E/A0-FF
-	 */
-	if(c < Rune22) {
-		c -= Rune21;
-		str[0] = c/Esc + Char21;
-		str[1] = T[c%Esc];
-		return 2;
-	}
-
-	/*
-	 * three character sequence
-	 *	04016-38E2D => A6-FB; 21-7E/A0-FF
-	 */
-	c -= Rune22;
-	str[0] = c/(Esc*Esc) + Char22;
-	str[1] = T[c/Esc%Esc];
-	str[2] = T[c%Esc];
-	return 3;
+	return runetochar(str, rune);
 }
 
 int
 fullisorune(char *str, int n)
 {
-	int c;
-
-	if(n > 0) {
-		c = *(uchar*)str;
-		if(c < Char1)
-			return 1;
-		if(n > 1)
-			if(c < Char22 || n > 2)
-				return 1;
-	}
-	return 0;
+	return fullrune(str, n);
 }
 
 enum
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