TB9.2 Example Applications: examples/PIPS/antiword/src/propmod.c Source File

00001 /*
+00002  * propmod.c
+00003  * Copyright (C) 2001-2003 A.J. van Os; Released under GPL
+00004  *
+00005  * Description:
+00006  * Build, read and destroy a list (array) of Word property modifiers
+00007  */
+00008 
+00009 #include <stdio.h>
+00010 #include <string.h>
+00011 #include "antiword.h"
+00012 
+00013 #if defined(DEBUG)
+00014 #define ELEMENTS_TO_ADD  3
+00015 #else
+00016 #define ELEMENTS_TO_ADD 30
+00017 #endif /* DEBUG */
+00018 
+00019 /* Variables needed to write the property modifier list */
+00020 static UCHAR    **ppAnchor = NULL;
+00021 static size_t   tNextFree = 0;
+00022 static size_t   tMaxElements = 0;
+00023 
+00024 
+00025 /*
+00026  * vDestroyPropModList - destroy the property modifier list
+00027  */
+00028 void
+00029 vDestroyPropModList(void)
+00030 {
+00031         size_t  tIndex;
+00032 
+00033         DBG_MSG("vDestroyPropModList");
+00034 
+00035         /* Free all the elements of the list */
+00036         for (tIndex = 0; tIndex < tNextFree; tIndex++) {
+00037                 ppAnchor[tIndex] = xfree(ppAnchor[tIndex]);
+00038         }
+00039         /* Free the list itself */
+00040         ppAnchor = xfree(ppAnchor);
+00041         /* Reset all control variables */
+00042         tNextFree = 0;
+00043         tMaxElements = 0;
+00044 } /* end of vDestroyPropModList */
+00045 
+00046 /*
+00047  * vAdd2PropModList - add an element to the property modifier list
+00048  */
+00049 void
+00050 vAdd2PropModList(const UCHAR *aucPropMod)
+00051 {
+00052         size_t  tSize, tLen;
+00053 
+00054         fail(aucPropMod == NULL);
+00055 
+00056         NO_DBG_MSG("vAdd2PropModList");
+00057 
+00058         if (tNextFree >= tMaxElements) {
+00059                 tMaxElements += ELEMENTS_TO_ADD;
+00060                 tSize = tMaxElements * sizeof(UCHAR **);
+00061                 ppAnchor = xrealloc(ppAnchor, tSize);
+00062         }
+00063         NO_DBG_DEC(tNextFree);
+00064 
+00065         tLen = 2 + (size_t)usGetWord(0, aucPropMod);
+00066         NO_DBG_HEX(tLen);
+00067         NO_DBG_PRINT_BLOCK(pucPropMod, tLen);
+00068         ppAnchor[tNextFree] = xmalloc(tLen);
+00069         memcpy(ppAnchor[tNextFree], aucPropMod, tLen);
+00070         tNextFree++;
+00071 } /* end of vAdd2PropModList */
+00072 
+00073 /*
+00074  * aucReadPropModListItem - get an item of the property modifier list
+00075  */
+00076 const UCHAR *
+00077 aucReadPropModListItem(USHORT usPropMod)
+00078 {
+00079         static UCHAR    aucBuffer[4];
+00080         size_t  tIndex;
+00081 
+00082         if (usPropMod == IGNORE_PROPMOD) {
+00083                 /* This Properties Modifier must be ignored */
+00084                 return NULL;
+00085         }
+00086 
+00087         if (!odd(usPropMod)) {
+00088                 /* Variant 1: The information is in the input ifself */
+00089                 aucBuffer[0] = 2;
+00090                 aucBuffer[1] = 0;
+00091                 aucBuffer[2] = (UCHAR)((usPropMod & 0x00fe) >> 1);
+00092                 aucBuffer[3] = (UCHAR)((usPropMod & 0xff00) >> 8);
+00093                 return aucBuffer;
+00094         }
+00095 
+00096         if (ppAnchor == NULL) {
+00097                 /* No information available */
+00098                 return NULL;
+00099         }
+00100 
+00101         /* Variant 2: The input contains an index */
+00102         tIndex = (size_t)(usPropMod >> 1);
+00103         if (tIndex >= tNextFree) {
+00104                 DBG_HEX(usPropMod);
+00105                 DBG_DEC(tIndex);
+00106                 DBG_DEC(tNextFree);
+00107                 return NULL;
+00108         }
+00109         return ppAnchor[tIndex];
+00110 } /* end of aucGetPropModListItem */
+