From adbb83845c5d3cb02343d7613cfb8385aa909909 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Tue, 18 Jan 2005 05:25:09 +0000
Subject: remove venti for now

---
 src/cmd/venti/unwhack.c | 179 ------------------------------------------------
 1 file changed, 179 deletions(-)
 delete mode 100644 src/cmd/venti/unwhack.c

(limited to 'src/cmd/venti/unwhack.c')

diff --git a/src/cmd/venti/unwhack.c b/src/cmd/venti/unwhack.c
deleted file mode 100644
index 5530bd07..00000000
--- a/src/cmd/venti/unwhack.c
+++ /dev/null
@@ -1,179 +0,0 @@
-#include "stdinc.h"
-#include "whack.h"
-
-enum
-{
-	DMaxFastLen	= 7,
-	DBigLenCode	= 0x3c,		/* minimum code for large lenth encoding */
-	DBigLenBits	= 6,
-	DBigLenBase	= 1		/* starting items to encode for big lens */
-};
-
-static uchar lenval[1 << (DBigLenBits - 1)] =
-{
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	3, 3, 3, 3, 3, 3, 3, 3,
-	4, 4, 4, 4,
-	5,
-	6,
-	255,
-	255
-};
-
-static uchar lenbits[] =
-{
-	0, 0, 0,
-	2, 3, 5, 5,
-};
-
-static uchar offbits[16] =
-{
-	5, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 12, 13
-};
-
-static ushort offbase[16] =
-{
-	0, 0x20,
-	0x40, 0x60,
-	0x80, 0xc0,
-	0x100, 0x180,
-	0x200, 0x300,
-	0x400, 0x600,
-	0x800, 0xc00,
-	0x1000,
-	0x2000
-};
-
-void
-unwhackinit(Unwhack *uw)
-{
-	uw->err[0] = '\0';
-}
-
-int
-unwhack(Unwhack *uw, uchar *dst, int ndst, uchar *src, int nsrc)
-{
-	uchar *s, *d, *dmax, *smax, lit;
-	ulong uwbits, lithist;
-	int i, off, len, bits, use, code, uwnbits, overbits;
-
-	d = dst;
-	dmax = d + ndst;
-
-	smax = src + nsrc;
-	uwnbits = 0;
-	uwbits = 0;
-	overbits = 0;
-	lithist = ~0;
-	while(src < smax || uwnbits - overbits >= MinDecode){
-		while(uwnbits <= 24){
-			uwbits <<= 8;
-			if(src < smax)
-				uwbits |= *src++;
-			else
-				overbits += 8;
-			uwnbits += 8;
-		}
-
-		/*
-		 * literal
-		 */
-		len = lenval[(uwbits >> (uwnbits - 5)) & 0x1f];
-		if(len == 0){
-			if(lithist & 0xf){
-				uwnbits -= 9;
-				lit = (uwbits >> uwnbits) & 0xff;
-				lit &= 255;
-			}else{
-				uwnbits -= 8;
-				lit = (uwbits >> uwnbits) & 0x7f;
-				if(lit < 32){
-					if(lit < 24){
-						uwnbits -= 2;
-						lit = (lit << 2) | ((uwbits >> uwnbits) & 3);
-					}else{
-						uwnbits -= 3;
-						lit = (lit << 3) | ((uwbits >> uwnbits) & 7);
-					}
-					lit = (lit - 64) & 0xff;
-				}
-			}
-			if(d >= dmax){
-				snprint(uw->err, WhackErrLen, "too much output");
-				return -1;
-			}
-			*d++ = lit;
-			lithist = (lithist << 1) | (lit < 32) | (lit > 127);
-			continue;
-		}
-
-		/*
-		 * length
-		 */
-		if(len < 255)
-			uwnbits -= lenbits[len];
-		else{
-			uwnbits -= DBigLenBits;
-			code = ((uwbits >> uwnbits) & ((1 << DBigLenBits) - 1)) - DBigLenCode;
-			len = DMaxFastLen;
-			use = DBigLenBase;
-			bits = (DBigLenBits & 1) ^ 1;
-			while(code >= use){
-				len += use;
-				code -= use;
-				code <<= 1;
-				uwnbits--;
-				if(uwnbits < 0){
-					snprint(uw->err, WhackErrLen, "len out of range");
-					return -1;
-				}
-				code |= (uwbits >> uwnbits) & 1;
-				use <<= bits;
-				bits ^= 1;
-			}
-			len += code;
-
-			while(uwnbits <= 24){
-				uwbits <<= 8;
-				if(src < smax)
-					uwbits |= *src++;
-				else
-					overbits += 8;
-				uwnbits += 8;
-			}
-		}
-
-		/*
-		 * offset
-		 */
-		uwnbits -= 4;
-		bits = (uwbits >> uwnbits) & 0xf;
-		off = offbase[bits];
-		bits = offbits[bits];
-
-		uwnbits -= bits;
-		off |= (uwbits >> uwnbits) & ((1 << bits) - 1);
-		off++;
-
-		if(off > d - dst){
-			snprint(uw->err, WhackErrLen, "offset out of range: off=%d d=%ld len=%d nbits=%d", off, d - dst, len, uwnbits);
-			return -1;
-		}
-		if(d + len > dmax){
-			snprint(uw->err, WhackErrLen, "len out of range");
-			return -1;
-		}
-		s = d - off;
-		for(i = 0; i < len; i++)
-			d[i] = s[i];
-		d += len;
-	}
-	if(uwnbits < overbits){
-		snprint(uw->err, WhackErrLen, "compressed data overrun");
-		return -1;
-	}
-
-	len = d - dst;
-
-	return len;
-}
-- 
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