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

00001 /*
-00002  * worddos.c
-00003  * Copyright (C) 2002-2005 A.J. van Os; Released under GNU GPL
-00004  *
-00005  * Description:
-00006  * Deal with the DOS internals of a MS Word file
-00007  */
-00008 
-00009 #include "antiword.h"
-00010 
-00011 
-00012 /*
-00013  * bGetDocumentText - make a list of the text blocks of a Word document
-00014  *
-00015  * Return TRUE when succesful, otherwise FALSE
-00016  */
-00017 static BOOL
-00018 bGetDocumentText(FILE *pFile, long lFilesize, const UCHAR *aucHeader)
-00019 {
-00020         text_block_type tTextBlock;
-00021         ULONG   ulTextLen;
-00022         BOOL    bFastSaved;
-00023         UCHAR   ucDocStatus, ucVersion;
-00024 
-00025         fail(pFile == NULL);
-00026         fail(lFilesize < 128);
-00027         fail(aucHeader == NULL);
-00028 
-00029         /* Get the status flags from the header */
-00030         ucDocStatus = ucGetByte(0x75, aucHeader);
-00031         DBG_HEX(ucDocStatus);
-00032         bFastSaved = (ucDocStatus & BIT(1)) != 0;
-00033         DBG_MSG_C(bFastSaved, "This document is Fast Saved");
-00034         ucVersion = ucGetByte(0x74, aucHeader);
-00035         DBG_DEC(ucVersion);
-00036         DBG_MSG_C(ucVersion == 0, "Written by Word 4.0 or earlier");
-00037         DBG_MSG_C(ucVersion == 3, "Word 5.0 format, but not written by Word");
-00038         DBG_MSG_C(ucVersion == 4, "Written by Word 5.x");
-00039         if (bFastSaved) {
-00040                 werr(0, "Word for DOS: autosave documents are not supported");
-00041                 return FALSE;
-00042         }
-00043 
-00044         /* Get length information */
-00045         ulTextLen = ulGetLong(0x0e, aucHeader);
-00046         DBG_HEX(ulTextLen);
-00047         ulTextLen -= 128;
-00048         DBG_DEC(ulTextLen);
-00049         tTextBlock.ulFileOffset = 128;
-00050         tTextBlock.ulCharPos = 128;
-00051         tTextBlock.ulLength = ulTextLen;
-00052         tTextBlock.bUsesUnicode = FALSE;
-00053         tTextBlock.usPropMod = IGNORE_PROPMOD;
-00054         if (!bAdd2TextBlockList(&tTextBlock)) {
-00055                 DBG_HEX(tTextBlock.ulFileOffset);
-00056                 DBG_HEX(tTextBlock.ulCharPos);
-00057                 DBG_DEC(tTextBlock.ulLength);
-00058                 DBG_DEC(tTextBlock.bUsesUnicode);
-00059                 DBG_DEC(tTextBlock.usPropMod);
-00060                 return FALSE;
-00061         }
-00062         return TRUE;
-00063 } /* end of bGetDocumentText */
-00064 
-00065 /*
-00066  * iInitDocumentDOS - initialize an DOS document
-00067  *
-00068  * Returns the version of Word that made the document or -1
-00069  */
-00070 int
-00071 iInitDocumentDOS(FILE *pFile, long lFilesize)
-00072 {
-00073         int     iWordVersion;
-00074         BOOL    bSuccess;
-00075         USHORT  usIdent;
-00076         UCHAR   aucHeader[128];
-00077 
-00078         fail(pFile == NULL);
-00079 
-00080         if (lFilesize < 128) {
-00081                 return -1;
-00082         }
-00083 
-00084         /* Read the headerblock */
-00085         if (!bReadBytes(aucHeader, 128, 0x00, pFile)) {
-00086                 return -1;
-00087         }
-00088         /* Get the "magic number" from the header */
-00089         usIdent = usGetWord(0x00, aucHeader);
-00090         DBG_HEX(usIdent);
-00091         fail(usIdent != 0xbe31);        /* Word for DOS */
-00092         iWordVersion = iGetVersionNumber(aucHeader);
-00093         if (iWordVersion != 0) {
-00094                 werr(0, "This file is not from 'Word for DOS'.");
-00095                 return -1;
-00096         }
-00097         bSuccess = bGetDocumentText(pFile, lFilesize, aucHeader);
-00098         if (bSuccess) {
-00099                 vGetPropertyInfo(pFile, NULL,
-00100                                 NULL, 0, NULL, 0,
-00101                                 aucHeader, iWordVersion);
-00102                 vSetDefaultTabWidth(pFile, NULL,
-00103                                 NULL, 0, NULL, 0,
-00104                                 aucHeader, iWordVersion);
-00105                 vGetNotesInfo(pFile, NULL,
-00106                                 NULL, 0, NULL, 0,
-00107                                 aucHeader, iWordVersion);
-00108         }
-00109         return bSuccess ? iWordVersion : -1;
-00110 } /* end of iInitDocumentDOS */
-