rowlist.c

   1 /*
   2  * rowlist.c
   3  * Copyright (C) 1998-2004 A.J. van Os; Released under GPL
   4  *
   5  * Description:
   6  * Build, read and destroy a list of Word table-row information
   7  */
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include "antiword.h"
  12
  13 /*
  14  * Private structure to hide the way the information
  15  * is stored from the rest of the program
  16  */
  17 typedef struct row_desc_tag {
  18         row_block_type          tInfo;
  19         struct row_desc_tag     *pNext;
  20 } row_desc_type;
  21
  22 /* Variables needed to write the Row Information List */
  23 static row_desc_type    *pAnchor = NULL;
  24 static row_desc_type    *pRowLast = NULL;
  25 /* Variable needed to read the Row Information List */
  26 static row_desc_type    *pRowCurrent = NULL;
  27
  28
  29 /*
  30  * vDestroyRowInfoList - destroy the Row Information List
  31  */
  32 void
  33 vDestroyRowInfoList(void)
  34 {
  35         row_desc_type   *pCurr, *pNext;
  36
  37         DBG_MSG("vDestroyRowInfoList");
  38
  39         /* Free the Row Information List */
  40         pCurr = pAnchor;
  41         while (pCurr != NULL) {
  42                 pNext = pCurr->pNext;
  43                 pCurr = xfree(pCurr);
  44                 pCurr = pNext;
  45         }
  46         pAnchor = NULL;
  47         /* Reset all control variables */
  48         pRowLast = NULL;
  49         pRowCurrent = NULL;
  50 } /* end of vDestroyRowInfoList */
  51
  52 /*
  53  * vAdd2RowInfoList - Add an element to the Row Information List
  54  */
  55 void
  56 vAdd2RowInfoList(const row_block_type *pRowBlock)
  57 {
  58         row_desc_type   *pListMember;
  59         short           *psTmp;
  60         int             iIndex;
  61
  62         fail(pRowBlock == NULL);
  63
  64         if (pRowBlock->ulFileOffsetStart == FC_INVALID ||
  65             pRowBlock->ulFileOffsetEnd == FC_INVALID ||
  66             pRowBlock->ulFileOffsetStart == pRowBlock->ulFileOffsetEnd) {
  67                 DBG_HEX_C(pRowBlock->ulFileOffsetStart != FC_INVALID,
  68                         pRowBlock->ulFileOffsetStart);
  69                 DBG_HEX_C(pRowBlock->ulFileOffsetEnd != FC_INVALID,
  70                         pRowBlock->ulFileOffsetEnd);
  71                 return;
  72         }
  73
  74         NO_DBG_HEX(pRowBlock->ulFileOffsetStart);
  75         NO_DBG_HEX(pRowBlock->ulFileOffsetEnd);
  76         NO_DBG_DEC(pRowBlock->ucNumberOfColumns);
  77
  78         /* Create the new list member */
  79         pListMember = xmalloc(sizeof(row_desc_type));
  80         /* Fill the new list member */
  81         pListMember->tInfo = *pRowBlock;
  82         pListMember->pNext = NULL;
  83         /* Correct the values where needed */
  84         for (iIndex = 0, psTmp = pListMember->tInfo.asColumnWidth;
  85              iIndex < (int)pListMember->tInfo.ucNumberOfColumns;
  86              iIndex++, psTmp++) {
  87                 if (*psTmp < 0) {
  88                         *psTmp = 0;
  89                         DBG_MSG("The column width was negative");
  90                 }
  91         }
  92         /* Add the new member to the list */
  93         if (pAnchor == NULL) {
  94                 pAnchor = pListMember;
  95                 pRowCurrent = pListMember;
  96         } else {
  97                 fail(pRowLast == NULL);
  98                 pRowLast->pNext = pListMember;
  99         }
 100         pRowLast = pListMember;
 101 } /* end of vAdd2RowInfoList */
 102
 103 /*
 104  * Get the next item in the Row Information List
 105  */
 106 const row_block_type *
 107 pGetNextRowInfoListItem(void)
 108 {
 109         const row_block_type    *pItem;
 110
 111         if (pRowCurrent == NULL) {
 112                 return NULL;
 113         }
 114         pItem = &pRowCurrent->tInfo;
 115         pRowCurrent = pRowCurrent->pNext;
 116         return pItem;
 117 } /* end of pGetNextRowInfoListItem */