ref: 5622b0bbd878dbc34045cc6fd37cffa64461eabe
dir: /sys/src/cmd/aux/antiword/sectlist.c/
/*
* sectlist.c
* Copyright (C) 2001-2004 A.J. van Os; Released under GNU GPL
*
* Description:
* Build, read and destroy list(s) of Word section information
*/
#include <stddef.h>
#include <string.h>
#include "antiword.h"
/*
* Private structure to hide the way the information
* is stored from the rest of the program
*/
typedef struct section_mem_tag {
section_block_type tInfo;
ULONG ulCharPos;
struct section_mem_tag *pNext;
} section_mem_type;
/* Variables needed to write the Section Information List */
static section_mem_type *pAnchor = NULL;
static section_mem_type *pSectionLast = NULL;
/*
* vDestroySectionInfoList - destroy the Section Information List
*/
void
vDestroySectionInfoList(void)
{
section_mem_type *pCurr, *pNext;
DBG_MSG("vDestroySectionInfoList");
/* Free the Section Information List */
pCurr = pAnchor;
while (pCurr != NULL) {
pNext = pCurr->pNext;
pCurr = xfree(pCurr);
pCurr = pNext;
}
pAnchor = NULL;
/* Reset all control variables */
pSectionLast = NULL;
} /* end of vDestroySectionInfoList */
/*
* vAdd2SectionInfoList - Add an element to the Section Information List
*/
void
vAdd2SectionInfoList(const section_block_type *pSection, ULONG ulCharPos)
{
section_mem_type *pListMember;
fail(pSection == NULL);
/* Create list member */
pListMember = xmalloc(sizeof(section_mem_type));
/* Fill the list member */
pListMember->tInfo = *pSection;
pListMember->ulCharPos = ulCharPos;
pListMember->pNext = NULL;
/* Add the new member to the list */
if (pAnchor == NULL) {
pAnchor = pListMember;
} else {
fail(pSectionLast == NULL);
pSectionLast->pNext = pListMember;
}
pSectionLast = pListMember;
} /* vAdd2SectionInfoList */
/*
* vGetDefaultSection - fill the section struct with default values
*/
void
vGetDefaultSection(section_block_type *pSection)
{
(void)memset(pSection, 0, sizeof(*pSection));
pSection->bNewPage = TRUE;
} /* end of vGetDefaultSection */
/*
* vDefault2SectionInfoList - Add a default to the Section Information List
*/
void
vDefault2SectionInfoList(ULONG ulCharPos)
{
section_block_type tSection;
vGetDefaultSection(&tSection);
vAdd2SectionInfoList(&tSection, ulCharPos);
} /* end of vDefault2SectionInfoList */
/*
* pGetSectionInfo - get the section information
*/
const section_block_type *
pGetSectionInfo(const section_block_type *pOld, ULONG ulCharPos)
{
const section_mem_type *pCurr;
if (pOld == NULL || ulCharPos == 0) {
if (pAnchor == NULL) {
/* There are no records, make one */
vDefault2SectionInfoList(0);
fail(pAnchor == NULL);
}
/* The first record */
NO_DBG_MSG("First record");
return &pAnchor->tInfo;
}
NO_DBG_HEX(ulCharPos);
for (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr->pNext) {
NO_DBG_HEX(pCurr->ulCharPos);
if (ulCharPos == pCurr->ulCharPos ||
ulCharPos + 1 == pCurr->ulCharPos) {
NO_DBG_HEX(pCurr->ulCharPos);
return &pCurr->tInfo;
}
}
return pOld;
} /* end of pGetSectionInfo */
/*
* tGetNumberOfSections - get the number of sections
*/
size_t
tGetNumberOfSections(void)
{
const section_mem_type *pCurr;
size_t tCounter;
for (tCounter = 0, pCurr = pAnchor;
pCurr != NULL;
tCounter++, pCurr = pCurr->pNext)
; /* Empty */
return tCounter;
} /* end of tGetNumberOfSections */
/*
* ucGetSepHdrFtrSpecification - get the Heder/footer specification
*/
UCHAR
ucGetSepHdrFtrSpecification(size_t tSectionNumber)
{
const section_mem_type *pCurr;
size_t tIndex;
for (tIndex = 0, pCurr = pAnchor;
tIndex < tSectionNumber && pCurr != NULL;
tIndex++, pCurr = pCurr->pNext)
; /* Empty */
if (pCurr == NULL) {
DBG_DEC(tSectionNumber);
DBG_FIXME();
return 0x00;
}
return pCurr->tInfo.ucHdrFtrSpecification;
} /* end of ucGetSepHdrFtrSpecification */