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/*
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* worddos.c
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* Copyright (C) 2002-2005 A.J. van Os; Released under GNU GPL
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*
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* Description:
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* Deal with the DOS internals of a MS Word file
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*/
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#include "antiword.h"
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/*
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* bGetDocumentText - make a list of the text blocks of a Word document
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*
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* Return TRUE when succesful, otherwise FALSE
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*/
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static BOOL
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bGetDocumentText(FILE *pFile, long lFilesize, const UCHAR *aucHeader)
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{
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text_block_type tTextBlock;
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ULONG ulTextLen;
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BOOL bFastSaved;
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UCHAR ucDocStatus, ucVersion;
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fail(pFile == NULL);
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fail(lFilesize < 128);
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fail(aucHeader == NULL);
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/* Get the status flags from the header */
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ucDocStatus = ucGetByte(0x75, aucHeader);
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DBG_HEX(ucDocStatus);
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bFastSaved = (ucDocStatus & BIT(1)) != 0;
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DBG_MSG_C(bFastSaved, "This document is Fast Saved");
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ucVersion = ucGetByte(0x74, aucHeader);
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DBG_DEC(ucVersion);
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DBG_MSG_C(ucVersion == 0, "Written by Word 4.0 or earlier");
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DBG_MSG_C(ucVersion == 3, "Word 5.0 format, but not written by Word");
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DBG_MSG_C(ucVersion == 4, "Written by Word 5.x");
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if (bFastSaved) {
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werr(0, "Word for DOS: autosave documents are not supported");
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return FALSE;
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}
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/* Get length information */
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ulTextLen = ulGetLong(0x0e, aucHeader);
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DBG_HEX(ulTextLen);
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ulTextLen -= 128;
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DBG_DEC(ulTextLen);
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tTextBlock.ulFileOffset = 128;
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tTextBlock.ulCharPos = 128;
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tTextBlock.ulLength = ulTextLen;
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tTextBlock.bUsesUnicode = FALSE;
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tTextBlock.usPropMod = IGNORE_PROPMOD;
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if (!bAdd2TextBlockList(&tTextBlock)) {
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DBG_HEX(tTextBlock.ulFileOffset);
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DBG_HEX(tTextBlock.ulCharPos);
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DBG_DEC(tTextBlock.ulLength);
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DBG_DEC(tTextBlock.bUsesUnicode);
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DBG_DEC(tTextBlock.usPropMod);
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return FALSE;
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}
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return TRUE;
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} /* end of bGetDocumentText */
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/*
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* iInitDocumentDOS - initialize an DOS document
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*
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* Returns the version of Word that made the document or -1
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*/
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int
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iInitDocumentDOS(FILE *pFile, long lFilesize)
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{
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int iWordVersion;
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BOOL bSuccess;
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USHORT usIdent;
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UCHAR aucHeader[128];
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fail(pFile == NULL);
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if (lFilesize < 128) {
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return -1;
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}
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/* Read the headerblock */
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if (!bReadBytes(aucHeader, 128, 0x00, pFile)) {
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return -1;
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}
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/* Get the "magic number" from the header */
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usIdent = usGetWord(0x00, aucHeader);
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DBG_HEX(usIdent);
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fail(usIdent != 0xbe31); /* Word for DOS */
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iWordVersion = iGetVersionNumber(aucHeader);
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if (iWordVersion != 0) {
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werr(0, "This file is not from 'Word for DOS'.");
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return -1;
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}
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bSuccess = bGetDocumentText(pFile, lFilesize, aucHeader);
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if (bSuccess) {
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vGetPropertyInfo(pFile, NULL,
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NULL, 0, NULL, 0,
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aucHeader, iWordVersion);
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vSetDefaultTabWidth(pFile, NULL,
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NULL, 0, NULL, 0,
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aucHeader, iWordVersion);
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vGetNotesInfo(pFile, NULL,
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NULL, 0, NULL, 0,
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aucHeader, iWordVersion);
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}
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return bSuccess ? iWordVersion : -1;
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} /* end of iInitDocumentDOS */
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