/* wvWare

* Copyright (C) Caolan McNamara, Dom Lachowicz, and others

*

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* of the License, or (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA

* 02111-1307, USA.

*/

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "wv.h"

#include "wvinternal.h"

static PAPX_FKP wvPAPX_FKP_previous;

static U32 wvPAPX_pn_previous = 0;

static CHPX_FKP wvCHPX_FKP_previous;

static U32 wvCHPX_pn_previous = 0;

void

external_wvReleasePAPX_FKP (void)

{

if (wvPAPX_pn_previous != 0)

{

wvPAPX_pn_previous = 0;

}

}

void

external_wvReleaseCHPX_FKP (void)

{

if (wvCHPX_pn_previous != 0)

{

wvCHPX_pn_previous = 0;

}

}

void

internal_wvReleasePAPX_FKP (PAPX_FKP * fkp)

{

int i;

wvFree (fkp->rgfc);

fkp->rgfc = NULL;

wvFree (fkp->rgbx);

fkp->rgbx = NULL;

for (i = 0; i < fkp->crun; i++)

wvReleasePAPX (&(fkp->grppapx[i]));

fkp->crun = 0;

wvFree (fkp->grppapx);

fkp->grppapx = NULL;

}

/*

At offset

511 is a 1-byte count named crun, which is a count of paragraphs in PAPX

FKPs. Beginning at offset 0 of the FKP is an array of crun+1 FCs, named

rgfc, which records the beginning and limit FCs of crun paragraphs.

immediately following the fkp.rgfc is an array of 13 byte

entries called BXs. This array called the rgbx is in 1-to-1 correspondence

with the rgfc. The first byte of the ith BX entry contains a single byte

field which gives the word offset of the PAPX that belongs to the paragraph

whose beginning in FC space is rgfc[i] and whose limit is rgfc[i+1] in FC

space. The last 12 bytes of the ith BX entry contain a PHE structure that

stores the current paragraph height of the paragraph whose beginning in FC

space is rgfc[i] and whose limit is rgfc[i+1] in FC space.

*/

/*

The first byte of each BX is the word offset of the PAPX recorded for

the paragraph corresponding to this BX. .. If the byte stored is 0,

this represents a 1 line paragraph 15 pixels high with Normal style

(stc == 0) whose column width is 7980 dxas. The last 12 bytes of

the BX is a PHE structure which stores the current paragraph height

for the paragraph corresponding to the BX. If a plcfphe has an entry

that maps to the FC for this paragraph, that entry's PHE overrides the PHE

stored in the FKP.11*fkp.crun+4 unused space. As new runs/paragraphs

are recorded in the FKP, unused space is reduced by 17 if CHPX/PAPX

is already recorded and is reduced by 17+sizeof(PAPX) if property is not

already recorded.

*/

void

wvGetPAPX_FKP (wvVersion ver, PAPX_FKP * fkp, U32 pn, wvStream * fd)

{

int i;

U8 page[WV_PAGESIZE];

U16 pos = 0;

/*size_t bytes_read; */

/* brian.ewins@bt.com */

/* there seem to be a lot of repeat calls... */

/* pn=0 is safe because thats the index block, not a PAPX_FKP */

if (pn != 0 && pn == wvPAPX_pn_previous)

{

memcpy (fkp, &wvPAPX_FKP_previous, sizeof (PAPX_FKP));

return;

}

wvTrace (

("seeking to %x to get crun\n",

pn * WV_PAGESIZE + (WV_PAGESIZE - 1)));

wvStream_goto (fd, pn * WV_PAGESIZE);

/*bytes_read= */ wvStream_read (page, WV_PAGESIZE, 1, fd);

fkp->crun = (U8) page[WV_PAGESIZE - 1];

fkp->rgfc = (U32 *) wvMalloc (sizeof (U32) * (fkp->crun + 1));

fkp->rgbx = (BX *) wvMalloc (sizeof (BX) * (fkp->crun));

fkp->grppapx = (PAPX *) wvMalloc (sizeof (PAPX) * (fkp->crun));

for (i = 0; i < fkp->crun + 1; i++)

{

fkp->rgfc[i] = bread_32ubit (&(page[pos]), &pos);

wvTrace (("rgfc is %x\n", fkp->rgfc[i]));

}

for (i = 0; i < fkp->crun; i++)

{

if (ver == WORD8)

wvGetBX (&fkp->rgbx[i], page, &pos);

else

wvGetBX6 (&fkp->rgbx[i], page, &pos);

}

for (i = 0; i < fkp->crun; i++)

{

if (fkp->rgbx[i].offset == 0)

{

wvTrace (("i is %d, using clear papx\n", i));

wvInitPAPX (&(fkp->grppapx[i]));

}

else

{

wvTrace (

("papx index i is %d, offset is %x\n", i,

pn * WV_PAGESIZE + fkp->rgbx[i].offset * 2));

pos = fkp->rgbx[i].offset * 2;

wvGetPAPX (ver, &(fkp->grppapx[i]), page, &pos);

}

}

if (wvPAPX_pn_previous != 0)

internal_wvReleasePAPX_FKP (&wvPAPX_FKP_previous);

memcpy (&wvPAPX_FKP_previous, fkp, sizeof (PAPX_FKP));

wvPAPX_pn_previous = pn;

}

/*

Using the FC, search the FCs FKP for the largest FC less than the character's FC,

call it fcTest.

*/

U32

wvSearchNextLargestFCPAPX_FKP (PAPX_FKP * fkp, U32 currentfc)

{

U32 i = 0;

U8 until = fkp->crun + 1;

U32 fcTest = 0;

while (i < until)

{

wvTrace (("searching fkp %x %x\n", currentfc, fkp->rgfc[i]));

if ((wvNormFC (fkp->rgfc[i], NULL) < currentfc)

&& (wvNormFC (fkp->rgfc[i], NULL) > fcTest))

fcTest = wvNormFC (fkp->rgfc[i], NULL);

else if (wvNormFC (fkp->rgfc[i], NULL) == currentfc)

fcTest = currentfc + 1;

i++;

}

/*for the first paragraph return the current pos as the beginning */

/*

if (fcTest == 0)

fcTest = currentfc+1;

*/

return (fcTest);

}

U32

wvSearchNextLargestFCCHPX_FKP (CHPX_FKP * fkp, U32 currentfc)

{

U32 i = 0;

U8 until = fkp->crun + 1;

U32 fcTest = 0;

while (i < until)

{

wvTrace (("searching fkp %x %x\n", currentfc, fkp->rgfc[i]));

if ((wvNormFC (fkp->rgfc[i], NULL) <= currentfc)

&& (wvNormFC (fkp->rgfc[i], NULL) > fcTest))

fcTest = wvNormFC (fkp->rgfc[i], NULL);

i++;

}

/*for the first paragraph return the current pos as the beginning */

/*

if (fcTest == 0)

fcTest = currentfc+1;

*/

return (fcTest);

}

/*

Using the FC of the character, first search the FKP that describes the

character to find the smallest FC in the rgfc that is larger than the character

FC.

*/

U32

wvSearchNextSmallestFCPAPX_FKP (PAPX_FKP * fkp, U32 currentfc)

{

U32 i = 0;

U32 fcTest = 0xffffffffL;

U8 until = fkp->crun + 1;

while (i < until)

{

wvTrace (

("Smallest %x, %x %x\n", currentfc,

wvNormFC (fkp->rgfc[i], NULL), wvNormFC (fkp->rgfc[i],

NULL)));

if ((wvNormFC (fkp->rgfc[i], NULL) > currentfc)

&& (wvNormFC (fkp->rgfc[i], NULL) < fcTest))

fcTest = wvNormFC (fkp->rgfc[i], NULL);

i++;

}

return (fcTest);

}

void

wvReleasePAPX_FKP (PAPX_FKP * fkp)

{

return;

}

void

wvInitPAPX_FKP (PAPX_FKP * fkp)

{

fkp->rgfc = NULL;

fkp->rgbx = NULL;

fkp->crun = 0;

fkp->grppapx = NULL;

}

int

wvGetIndexFCInFKP_PAPX (PAPX_FKP * fkp, U32 currentfc)

{

U32 i = 1; /*was 0, there is something slightly out of sync in the system */

U8 until = fkp->crun + 1;

while (i < until)

{

wvTrace (

("current fc is %x, %x, %x\n", currentfc,

wvNormFC (fkp->rgfc[i], NULL), fkp->rgfc[i]));

if (wvNormFC (fkp->rgfc[i], NULL) == currentfc)

return (i);

i++;

}

/*

basically read

Algorithm to determine paragraph properties for a paragraph &

Formatted Disk Page for PAPXs, somehow the currentfc sent in was wrong

or my understanding is !

*/

wvTrace (("Shite, fix me %x %x\n", currentfc, fkp->rgfc[0]));

/*return 1 to make things continue on their merry way */

return (1);

}

void

internal_wvReleaseCHPX_FKP (CHPX_FKP * fkp)

{

int i;

wvTrace (("chpx fkp b freeed\n"));

wvFree (fkp->rgfc);

fkp->rgfc = NULL;

wvFree (fkp->rgb);

fkp->rgb = NULL;

for (i = 0; i < fkp->crun; i++)

wvReleaseCHPX (&(fkp->grpchpx[i]));

fkp->crun = 0;

wvFree (fkp->grpchpx);

fkp->grpchpx = NULL;

wvTrace (("chpx fkp e freeed\n"));

}

/* Character properties

* -basically just like PAPX FKPs above

* however, rather than an array of BX structs in rgbx,

* there is an array of bytes (giving the word offset to the CHPX) in rgb

* -JB

*/

void

wvGetCHPX_FKP (wvVersion ver, CHPX_FKP * fkp, U32 pn, wvStream * fd)

{

int i;

U8 page[WV_PAGESIZE];

U16 pos = 0;

/*size_t bytes_read; */

/* brian.ewins@bt.com */

/* there seem to be a lot of repeat calls... */

/* pn=0 is safe because thats the index block, not a CHPX_FKP */

if (pn != 0 && pn == wvCHPX_pn_previous)

{

memcpy (fkp, &wvCHPX_FKP_previous, sizeof (CHPX_FKP));

return;

}

wvStream_goto (fd, pn * WV_PAGESIZE);

/*bytes_read= */ wvStream_read (page, WV_PAGESIZE, 1, fd);

fkp->crun = (U8) page[WV_PAGESIZE - 1];

wvTrace (("chpx fkp gone to %x\n", pn * WV_PAGESIZE + (WV_PAGESIZE - 1)));

wvTrace (("crun is %d\n", fkp->crun));

fkp->rgfc = (U32 *) wvMalloc (sizeof (U32) * (fkp->crun + 1));

fkp->rgb = (U8 *) wvMalloc (sizeof (U8) * (fkp->crun));

fkp->grpchpx = (CHPX *) wvMalloc (sizeof (CHPX) * (fkp->crun));

wvStream_goto (fd, pn * WV_PAGESIZE);

wvTrace (("offset is %x\n", pn * WV_PAGESIZE));

for (i = 0; i < fkp->crun + 1; i++)

{

fkp->rgfc[i] = bread_32ubit (&(page[pos]), &pos);

wvTrace (("rgfc is %x\n", fkp->rgfc[i]));

}

for (i = 0; i < fkp->crun; i++)

fkp->rgb[i] = bread_8ubit (&(page[pos]), &pos);

for (i = 0; i < fkp->crun; i++)

{

if (fkp->rgb[i] == 0)

{

wvTrace (("i is %d, using clear chpx\n", i));

wvInitCHPX (&(fkp->grpchpx[i]));

}

else

{

wvTrace (

("chpx index i is %d, offset is %x\n", i,

(pn * WV_PAGESIZE) + (fkp->rgb[i] * 2)));

pos = fkp->rgb[i] * 2;

wvGetCHPX (ver, &(fkp->grpchpx[i]), page, &pos);

}

}

if (wvCHPX_pn_previous != 0)

internal_wvReleaseCHPX_FKP (&wvCHPX_FKP_previous);

memcpy (&wvCHPX_FKP_previous, fkp, sizeof (CHPX_FKP));

wvCHPX_pn_previous = pn;

}

void

wvReleaseCHPX_FKP (CHPX_FKP * fkp)

{

return;

}

void

wvInitCHPX_FKP (CHPX_FKP * fkp)

{

fkp->rgfc = NULL;

fkp->rgb = NULL;

fkp->crun = 0;

fkp->grpchpx = NULL;

}