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WebSVN – planix.SVN – Blame – /os/branches/feature-vt/sys/src/cmd/aux/antiword/sectlist.c – Rev 2

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/*
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 * sectlist.c
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 * Copyright (C) 2001-2004 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 list(s) of Word section information
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 */
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#include <stddef.h>
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#include <string.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 section_mem_tag {
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	section_block_type	tInfo;
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	ULONG			ulCharPos;
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	struct section_mem_tag	*pNext;
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} section_mem_type;
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/* Variables needed to write the Section Information List */
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static section_mem_type	*pAnchor = NULL;
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static section_mem_type	*pSectionLast = NULL;
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/*
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 * vDestroySectionInfoList - destroy the Section Information List
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 */
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void
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vDestroySectionInfoList(void)
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{
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	section_mem_type	*pCurr, *pNext;
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	DBG_MSG("vDestroySectionInfoList");
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	/* Free the Section 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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	pSectionLast = NULL;
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} /* end of vDestroySectionInfoList */
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/*
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 * vAdd2SectionInfoList - Add an element to the Section Information List
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 */
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void
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vAdd2SectionInfoList(const section_block_type *pSection, ULONG ulCharPos)
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{
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	section_mem_type	*pListMember;
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	fail(pSection == NULL);
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	/* Create list member */
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	pListMember = xmalloc(sizeof(section_mem_type));
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	/* Fill the list member */
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	pListMember->tInfo = *pSection;
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	pListMember->ulCharPos = ulCharPos;
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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(pSectionLast == NULL);
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		pSectionLast->pNext = pListMember;
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	}
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	pSectionLast = pListMember;
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} /* vAdd2SectionInfoList */
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/*
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 * vGetDefaultSection - fill the section struct with default values
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 */
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void
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vGetDefaultSection(section_block_type *pSection)
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{
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	(void)memset(pSection, 0, sizeof(*pSection));
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	pSection->bNewPage = TRUE;
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} /* end of vGetDefaultSection */
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/*
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 * vDefault2SectionInfoList - Add a default to the Section Information List
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 */
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void
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vDefault2SectionInfoList(ULONG ulCharPos)
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{
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	section_block_type	tSection;
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	vGetDefaultSection(&tSection);
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	vAdd2SectionInfoList(&tSection, ulCharPos);
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} /* end of vDefault2SectionInfoList */
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/*
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 * pGetSectionInfo - get the section information
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 */
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const section_block_type *
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pGetSectionInfo(const section_block_type *pOld, ULONG ulCharPos)
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{
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	const section_mem_type	*pCurr;
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	if (pOld == NULL || ulCharPos == 0) {
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		if (pAnchor == NULL) {
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			/* There are no records, make one */
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			vDefault2SectionInfoList(0);
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			fail(pAnchor == NULL);
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		}
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		/* The first record */
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		NO_DBG_MSG("First record");
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		return &pAnchor->tInfo;
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	}
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	NO_DBG_HEX(ulCharPos);
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	for (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr->pNext) {
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		NO_DBG_HEX(pCurr->ulCharPos);
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		if (ulCharPos == pCurr->ulCharPos ||
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		    ulCharPos + 1 == pCurr->ulCharPos) {
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			NO_DBG_HEX(pCurr->ulCharPos);
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			return &pCurr->tInfo;
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		}
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	}
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	return pOld;
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} /* end of pGetSectionInfo */
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/*
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 * tGetNumberOfSections - get the number of sections
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 */
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size_t
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tGetNumberOfSections(void)
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{
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	const section_mem_type	*pCurr;
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	size_t	tCounter;
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	for (tCounter = 0, pCurr = pAnchor;
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	     pCurr != NULL;
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	     tCounter++, pCurr = pCurr->pNext)
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		;	/* Empty */
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	return tCounter;
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} /* end of tGetNumberOfSections */
145 
 
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/*
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 * ucGetSepHdrFtrSpecification - get the Heder/footer specification
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 */
149 
UCHAR
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ucGetSepHdrFtrSpecification(size_t tSectionNumber)
151 
{
152 
	const section_mem_type	*pCurr;
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	size_t	tIndex;
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	for (tIndex = 0, pCurr = pAnchor;
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	     tIndex < tSectionNumber && pCurr != NULL;
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	     tIndex++, pCurr = pCurr->pNext)
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		;	/* Empty */
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	if (pCurr == NULL) {
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		DBG_DEC(tSectionNumber);
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		DBG_FIXME();
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		return 0x00;
163 
	}
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	return pCurr->tInfo.ucHdrFtrSpecification;
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} /* end of ucGetSepHdrFtrSpecification */