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/*
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* pictlist.c
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* Copyright (C) 2000-2004 A.J. van Os; Released under GNU GPL
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*
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* Description:
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* Build, read and destroy a list of Word picture information
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*/
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#include <stdlib.h>
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#include "antiword.h"
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/*
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* Private structure to hide the way the information
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* is stored from the rest of the program
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*/
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typedef struct picture_mem_tag {
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picture_block_type tInfo;
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struct picture_mem_tag *pNext;
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} picture_mem_type;
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/* Variables needed to write the Picture Information List */
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static picture_mem_type *pAnchor = NULL;
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static picture_mem_type *pPictureLast = NULL;
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/*
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* vDestroyPictInfoList - destroy the Picture Information List
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*/
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void
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vDestroyPictInfoList(void)
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{
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picture_mem_type *pCurr, *pNext;
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DBG_MSG("vDestroyPictInfoList");
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/* Free the Picture Information List */
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pCurr = pAnchor;
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while (pCurr != NULL) {
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pNext = pCurr->pNext;
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pCurr = xfree(pCurr);
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pCurr = pNext;
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}
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pAnchor = NULL;
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/* Reset all control variables */
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pPictureLast = NULL;
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} /* end of vDestroyPictInfoList */
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/*
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* vAdd2PictInfoList - Add an element to the Picture Information List
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*/
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void
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vAdd2PictInfoList(const picture_block_type *pPictureBlock)
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{
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picture_mem_type *pListMember;
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fail(pPictureBlock == NULL);
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NO_DBG_MSG("bAdd2PictInfoList");
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if (pPictureBlock->ulFileOffset == FC_INVALID) {
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/*
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* This offset is really past the end of the file,
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* so don't waste any memory by storing it.
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*/
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return;
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}
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if (pPictureBlock->ulFileOffsetPicture == FC_INVALID) {
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/*
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* The place where this picture is supposed to be stored
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* doesn't exist.
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*/
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return;
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}
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NO_DBG_HEX(pPictureBlock->ulFileOffset);
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NO_DBG_HEX(pPictureBlock->ulFileOffsetPicture);
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NO_DBG_HEX(pPictureBlock->ulPictureOffset);
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/* Create list member */
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pListMember = xmalloc(sizeof(picture_mem_type));
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/* Fill the list member */
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pListMember->tInfo = *pPictureBlock;
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pListMember->pNext = NULL;
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/* Add the new member to the list */
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if (pAnchor == NULL) {
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pAnchor = pListMember;
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} else {
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fail(pPictureLast == NULL);
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pPictureLast->pNext = pListMember;
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}
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pPictureLast = pListMember;
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} /* end of vAdd2PictInfoList */
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/*
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* Get the info with the given file offset from the Picture Information List
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*/
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ULONG
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ulGetPictInfoListItem(ULONG ulFileOffset)
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{
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picture_mem_type *pCurr;
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for (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr->pNext) {
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if (pCurr->tInfo.ulFileOffset == ulFileOffset) {
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return pCurr->tInfo.ulFileOffsetPicture;
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}
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}
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return FC_INVALID;
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} /* end of ulGetPictInfoListItem */
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