rename part 1 -- files

1 files changed, 0 insertions, 261 deletions

diff --git a/filter/lzwe.c b/filter/lzwe.c
deleted file mode 100644
index f2c3c7a4..00000000
--- a/filter/lzwe.c
+++ /dev/null
@@ -1,261 +0,0 @@
-#include <fitz.h>
-
-#define noDEBUG 1
-
-enum
-{
-	MINBITS = 9,
-	MAXBITS = 12,
-	MAXBYTES = 2,
-	NUMCODES = (1 << MAXBITS),
-	LZW_CLEAR = 256,
-	LZW_EOD = 257,
-	LZW_FIRST = 258,
-	HSIZE = 9001,		/* 91% occupancy (???) */
-	HSHIFT = (13 - 8)
-};
-
-typedef struct lzw_hash_s lzw_hash;
-
-struct lzw_hash_s
-{
-	int hash;
-	int code;
-};
-
-typedef struct fz_lzwe_s fz_lzwe;
-
-struct fz_lzwe_s
-{
-	fz_filter super;
-
-	int earlychange;
-
-	int bidx;		/* partial bits used in out->wp */
-	unsigned char bsave;	/* partial byte saved between process() calls */
-
-	int resume;
-	int code;
-	int fcode;
-	int hcode;
-
-	int codebits;
-	int oldcode;
-	int nextcode;
-
-	lzw_hash table[HSIZE];
-};
-
-static void
-clearhash(fz_lzwe *lzw)
-{
-	int i;
-	for (i = 0; i < HSIZE; i++)
-		lzw->table[i].hash = -1;
-}
-
-fz_error *
-fz_newlzwe(fz_filter **fp, fz_obj *params)
-{
-	FZ_NEWFILTER(fz_lzwe, lzw, lzwe);
-
-	lzw->earlychange = 0;
-
-	if (params)
-	{
-		fz_obj *obj;
-		obj = fz_dictgets(params, "EarlyChange");
-		if (obj) lzw->earlychange = fz_toint(obj) != 0;
-	}
-
-	lzw->bidx = 0;
-	lzw->bsave = 0;
-
-	lzw->resume = 0;
-	lzw->code = -1;
-	lzw->hcode = -1;
-	lzw->fcode = -1;
-
-	lzw->codebits = MINBITS;
-	lzw->nextcode = LZW_FIRST;
-	lzw->oldcode = -1;	/* generates LZW_CLEAR */
-
-	clearhash(lzw);
-
-	return nil;
-}
-
-void
-fz_droplzwe(fz_filter *filter)
-{
-}
-
-static void
-putcode(fz_lzwe *lzw, fz_buffer *out, int code)
-{
-	int nbits = lzw->codebits;
-
-	while (nbits > 0)
-	{
-		if (lzw->bidx == 0)
-		{
-			*out->wp = 0;
-		}
-
-		/* code does not fit: shift right */
-		if (nbits > (8 - lzw->bidx))
-		{
-			*out->wp |= code >> (nbits - (8 - lzw->bidx));
-			nbits = nbits - (8 - lzw->bidx);
-			lzw->bidx = 0;
-			out->wp ++;
-		}
-
-		/* shift left */
-		else
-		{
-			*out->wp |= code << ((8 - lzw->bidx) - nbits);
-			lzw->bidx += nbits;
-			if (lzw->bidx == 8)
-			{
-				lzw->bidx = 0;
-				out->wp ++;
-			}
-			nbits = 0;
-		}
-	}
-}
-
-
-static fz_error *
-compress(fz_lzwe *lzw, fz_buffer *in, fz_buffer *out)
-{
-	if (lzw->resume)
-	{
-		lzw->resume = 0;
-		goto resume;
-	}
-
-	/* at start of data, output a clear code */
-	if (lzw->oldcode == -1)
-	{
-		if (out->wp + 3 > out->ep)
-			return fz_ioneedout;
-
-		if (in->rp + 1 > in->wp)
-		{
-			if (in->eof)
-				goto eof;
-			return fz_ioneedin;
-		}
-
-		putcode(lzw, out, LZW_CLEAR);
-
-		lzw->oldcode = *in->rp++;
-	}
-
-begin:
-	while (1)
-	{
-		if (in->rp + 1 > in->wp)
-		{
-			if (in->eof)
-				goto eof;
-			return fz_ioneedin;
-		}
-
-		/* read character */
-		lzw->code = *in->rp++;
-
-		/* hash string + character */
-		lzw->fcode = (lzw->code << MAXBITS) + lzw->oldcode;
-		lzw->hcode = (lzw->code << HSHIFT) ^ lzw->oldcode;
-
-		/* primary hash */
-		if (lzw->table[lzw->hcode].hash == lzw->fcode)
-		{
-			lzw->oldcode = lzw->table[lzw->hcode].code;
-			continue;
-		}
-
-		/* secondary hash */
-		if (lzw->table[lzw->hcode].hash != -1)
-		{
-			int disp = HSIZE - lzw->hcode;
-			if (lzw->hcode == 0)
-				disp = 1;
-			do
-			{
-				lzw->hcode = lzw->hcode - disp;
-				if (lzw->hcode < 0)
-					lzw->hcode += HSIZE;
-				if (lzw->table[lzw->hcode].hash == lzw->fcode)
-				{
-					lzw->oldcode = lzw->table[lzw->hcode].code;
-					goto begin;
-				}
-			} while (lzw->table[lzw->hcode].hash != -1);
-		}
-
-resume:
-		/* new entry: emit code and add to table */
-
-		/* reserve space for this code and an eventual CLEAR code */
-		if (out->wp + 5 > out->ep)
-		{	
-			lzw->resume = 1;
-			return fz_ioneedout;
-		}
-
-		putcode(lzw, out, lzw->oldcode);
-
-		lzw->oldcode = lzw->code;
-		lzw->table[lzw->hcode].code = lzw->nextcode;
-		lzw->table[lzw->hcode].hash = lzw->fcode;
-
-		lzw->nextcode ++;
-
-		/* table is full: emit clear code and reset */
-		if (lzw->nextcode == NUMCODES - 1)
-		{
-			putcode(lzw, out, LZW_CLEAR);
-			clearhash(lzw);
-			lzw->nextcode = LZW_FIRST;
-			lzw->codebits = MINBITS;
-		}
-
-		/* check if next entry will be too big for the code size */
-		else if (lzw->nextcode >= (1 << lzw->codebits) - lzw->earlychange)
-		{
-			lzw->codebits ++;
-		}
-	}
-
-eof:
-	if (out->wp + 5 > out->ep)
-		return fz_ioneedout;
-
-	putcode(lzw, out, lzw->oldcode);
-	putcode(lzw, out, LZW_EOD);
-
-	out->eof = 1;
-	return fz_iodone;
-}
-
-fz_error *
-fz_processlzwe(fz_filter *filter, fz_buffer *in, fz_buffer *out)
-{
-	fz_lzwe *lzw = (fz_lzwe*)filter;
-	fz_error *error;
-
-	/* restore partial bits */
-	*out->wp = lzw->bsave;
-
-	error = compress(lzw, in, out);
-
-	/* save partial bits */
-	lzw->bsave = *out->wp;
-
-	return error;
-}
-