prop6.c

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

			break;
		default:
			break;
		}
		if (iInfoLen <= 0) {
			iInfoLen =
				iGet6InfoLength(iFodo + iFodoOff, aucGrpprl);
			fail(iInfoLen <= 0);
		}
		iFodoOff += iInfoLen;
	}
} /* end of vGet6StyleInfo */

/*
 * Build the lists with Paragraph Information for Word 6/7 files
 */
void
vGet6PapInfo(FILE *pFile, ULONG ulStartBlock,
	const ULONG *aulBBD, size_t tBBDLen,
	const UCHAR *aucHeader)
{
	row_block_type		tRow;
	style_block_type	tStyle;
	USHORT	*ausParfPage;
	UCHAR	*aucBuffer;
	ULONG	ulCharPos, ulCharPosFirst, ulCharPosLast;
	ULONG	ulBeginParfInfo;
	size_t	tParfInfoLen, tParfPageNum, tOffset, tSize, tLenOld, tLen;
	size_t	tIndex, tIndex2, tRun;
	int	iFodo, iLen;
	row_info_enum	eRowInfo;
	USHORT	usParfFirstPage, usCount, usIstd;
	UCHAR	aucFpage[BIG_BLOCK_SIZE];

	fail(pFile == NULL || aucHeader == NULL);
	fail(ulStartBlock > MAX_BLOCKNUMBER && ulStartBlock != END_OF_CHAIN);
	fail(aulBBD == NULL);

	ulBeginParfInfo = ulGetLong(0xc0, aucHeader); /* fcPlcfbtePapx */
	NO_DBG_HEX(ulBeginParfInfo);
	tParfInfoLen = (size_t)ulGetLong(0xc4, aucHeader); /* lcbPlcfbtePapx */
	NO_DBG_DEC(tParfInfoLen);
	if (tParfInfoLen < 4) {
		DBG_DEC(tParfInfoLen);
		return;
	}

	aucBuffer = xmalloc(tParfInfoLen);
	if (!bReadBuffer(pFile, ulStartBlock,
			aulBBD, tBBDLen, BIG_BLOCK_SIZE,
			aucBuffer, ulBeginParfInfo, tParfInfoLen)) {
		aucBuffer = xfree(aucBuffer);
		return;
	}
	NO_DBG_PRINT_BLOCK(aucBuffer, tParfInfoLen);

	tLen = (tParfInfoLen - 4) / 6;
	ausParfPage = xcalloc(tLen, sizeof(USHORT));
	for (tIndex = 0, tOffset = (tLen + 1) * 4;
	     tIndex < tLen;
	     tIndex++, tOffset += 2) {
		 ausParfPage[tIndex] = usGetWord(tOffset, aucBuffer);
		 NO_DBG_DEC(ausParfPage[tIndex]);
	}
	DBG_HEX(ulGetLong(0, aucBuffer));
	aucBuffer = xfree(aucBuffer);
	tParfPageNum = (size_t)usGetWord(0x190, aucHeader); /* cpnBtePap */
	DBG_DEC(tParfPageNum);
	if (tLen < tParfPageNum) {
		/* Replace ParfPage by a longer version */
		tLenOld = tLen;
		usParfFirstPage = usGetWord(0x18c, aucHeader); /* pnPapFirst */
		DBG_DEC(usParfFirstPage);
		tLen += tParfPageNum - 1;
		tSize = tLen * sizeof(USHORT);
		ausParfPage = xrealloc(ausParfPage, tSize);
		/* Add new values */
		usCount = usParfFirstPage + 1;
		for (tIndex = tLenOld; tIndex < tLen; tIndex++) {
			ausParfPage[tIndex] = usCount;
			NO_DBG_DEC(ausParfPage[tIndex]);
			usCount++;
		}
	}

	(void)memset(&tRow, 0, sizeof(tRow));
	ulCharPosFirst = CP_INVALID;
	for (tIndex = 0; tIndex < tLen; tIndex++) {
		if (!bReadBuffer(pFile, ulStartBlock,
				aulBBD, tBBDLen, BIG_BLOCK_SIZE,
				aucFpage,
				(ULONG)ausParfPage[tIndex] * BIG_BLOCK_SIZE,
				BIG_BLOCK_SIZE)) {
			break;
		}
		tRun = (size_t)ucGetByte(0x1ff, aucFpage);
		NO_DBG_DEC(tRun);
		for (tIndex2 = 0; tIndex2 < tRun; tIndex2++) {
			NO_DBG_HEX(ulGetLong(tIndex2 * 4, aucFpage));
			iFodo = 2 * (int)ucGetByte(
				(tRun + 1) * 4 + tIndex2 * 7, aucFpage);
			if (iFodo <= 0) {
				continue;
			}

			iLen = 2 * (int)ucGetByte(iFodo, aucFpage);

			usIstd = (USHORT)ucGetByte(iFodo + 1, aucFpage);
			vFillStyleFromStylesheet(usIstd, &tStyle);
			vGet6StyleInfo(iFodo, aucFpage + 3, iLen - 3, &tStyle);
			ulCharPos = ulGetLong(tIndex2 * 4, aucFpage);
			NO_DBG_HEX(ulCharPos);
			tStyle.ulFileOffset = ulCharPos2FileOffsetX(
				ulCharPos, &tStyle.eListID);
			vAdd2StyleInfoList(&tStyle);

			eRowInfo = eGet6RowInfo(iFodo,
					aucFpage + 3, iLen - 3, &tRow);
			switch(eRowInfo) {
			case found_a_cell:
				if (ulCharPosFirst != CP_INVALID) {
					break;
				}
				ulCharPosFirst = ulGetLong(
						tIndex2 * 4, aucFpage);
				NO_DBG_HEX(ulCharPosFirst);
				tRow.ulCharPosStart = ulCharPosFirst;
				tRow.ulFileOffsetStart =
					ulCharPos2FileOffset(ulCharPosFirst);
				DBG_HEX_C(tRow.ulFileOffsetStart == FC_INVALID,
							ulCharPosFirst);
				break;
			case found_end_of_row:
				ulCharPosLast = ulGetLong(
						tIndex2 * 4, aucFpage);
				NO_DBG_HEX(ulCharPosLast);
				tRow.ulCharPosEnd = ulCharPosLast;
				tRow.ulFileOffsetEnd =
					ulCharPos2FileOffset(ulCharPosLast);
				DBG_HEX_C(tRow.ulFileOffsetEnd == FC_INVALID,
							ulCharPosLast);
				vAdd2RowInfoList(&tRow);
				(void)memset(&tRow, 0, sizeof(tRow));
				ulCharPosFirst = CP_INVALID;
				break;
			case found_nothing:
				break;
			default:
				DBG_DEC(eRowInfo);
				break;
			}
		}
	}
	ausParfPage = xfree(ausParfPage);
} /* end of vGet6PapInfo */

/*
 * Fill the font information block with information
 * from a Word 6/7 file.
 * Returns TRUE when successful, otherwise FALSE
 */
void
vGet6FontInfo(int iFodo, USHORT usIstd,
	const UCHAR *aucGrpprl, int iBytes, font_block_type *pFont)
{
	long	lTmp;
	int	iFodoOff, iInfoLen;
	USHORT	usTmp;
	UCHAR	ucTmp;

	TRACE_MSG("vGet6FontInfo");

	fail(iFodo < 0 || aucGrpprl == NULL || pFont == NULL);

	iFodoOff = 0;
	while (iBytes >= iFodoOff + 1) {
		switch (ucGetByte(iFodo + iFodoOff, aucGrpprl)) {
		case  65:	/* fRMarkDel */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			if (ucTmp == 0) {
				pFont->usFontStyle &= ~FONT_MARKDEL;
			} else {
				pFont->usFontStyle |= FONT_MARKDEL;
			}
			break;
		case  80:	/* cIstd */
			usTmp = usGetWord(iFodo + iFodoOff + 1, aucGrpprl);
			NO_DBG_DEC(usTmp);
			break;
		case  82:	/* cDefault */
			pFont->usFontStyle &= FONT_HIDDEN;
			pFont->ucFontColor = FONT_COLOR_DEFAULT;
			break;
		case  83:	/* cPlain */
			DBG_MSG("83: cPlain");
			vFillFontFromStylesheet(usIstd, pFont);
			break;
		case  85:	/* fBold */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_BOLD;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_BOLD;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_BOLD;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  86:	/* fItalic */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_ITALIC;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_ITALIC;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_ITALIC;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  87:	/* fStrike */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_STRIKE;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_STRIKE;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_STRIKE;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  90:	/* fSmallCaps */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_SMALL_CAPITALS;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_SMALL_CAPITALS;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_SMALL_CAPITALS;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  91:	/* fCaps */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_CAPITALS;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_CAPITALS;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_CAPITALS;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  92:	/* fVanish */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			switch (ucTmp) {
			case   0:	/* Unset */
				pFont->usFontStyle &= ~FONT_HIDDEN;
				break;
			case   1:	/* Set */
				pFont->usFontStyle |= FONT_HIDDEN;
				break;
			case 128:	/* Unchanged */
				break;
			case 129:	/* Negation */
				pFont->usFontStyle ^= FONT_HIDDEN;
				break;
			default:
				DBG_DEC(ucTmp);
				DBG_FIXME();
				break;
			}
			break;
		case  93:	/* cFtc */
			usTmp = usGetWord(iFodo + iFodoOff + 1, aucGrpprl);
			if (usTmp <= (USHORT)UCHAR_MAX) {
				pFont->ucFontNumber = (UCHAR)usTmp;
			} else {
				DBG_DEC(usTmp);
				DBG_FIXME();
				pFont->ucFontNumber = 0;
			}
			break;
		case  94:	/* cKul */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			if (ucTmp == 0 || ucTmp == 5) {
				pFont->usFontStyle &= ~FONT_UNDERLINE;
			} else {
				NO_DBG_MSG("Underline text");
				pFont->usFontStyle |= FONT_UNDERLINE;
				if (ucTmp == 6) {
					DBG_MSG("Bold text");
					pFont->usFontStyle |= FONT_BOLD;
				}
			}
			break;
		case  95:	/* cHps, cHpsPos */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			DBG_DEC(ucTmp);
			if (ucTmp != 0) {
				pFont->usFontSize = (USHORT)ucTmp;
			}
			ucTmp = ucGetByte(iFodo + iFodoOff + 2, aucGrpprl);
			DBG_DEC(ucTmp);
			break;
		case  98:	/* cIco */
			pFont->ucFontColor =
				ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			break;
		case  99:	/* cHps */
			pFont->usFontSize =
				usGetWord(iFodo + iFodoOff + 1, aucGrpprl);
			break;
		case 100:	/* cHpsInc */
			DBG_MSG("100: sprmCHpsInc");
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			DBG_DEC(ucTmp);
			break;
		case 103:	/* cMajority */
			DBG_MSG("103: sprmCMajority");
			break;
		case 104:	/* cIss */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			ucTmp &= 0x07;
			if (ucTmp == 1) {
				pFont->usFontStyle |= FONT_SUPERSCRIPT;
				NO_DBG_MSG("Superscript");
			} else if (ucTmp == 2) {
				pFont->usFontStyle |= FONT_SUBSCRIPT;
				NO_DBG_MSG("Subscript");
			}
			break;
		case 106:	/* cHpsInc1 */
			usTmp = usGetWord(iFodo + iFodoOff + 1, aucGrpprl);
			lTmp = (long)pFont->usFontSize + (long)usTmp;
			if (lTmp < 8) {
				pFont->usFontSize = 8;
			} else if (lTmp > 32766) {
				pFont->usFontSize = 32766;
			} else {
				pFont->usFontSize = (USHORT)lTmp;
			}
			break;
		case 108:	/* cMajority50 */
			DBG_MSG("108: sprmCMajority50");
			break;
		case 109:	/* cHpsMul */
			DBG_MSG("109: sprmCHpsMul");
			usTmp = usGetWord(iFodo + iFodoOff + 1, aucGrpprl);
			DBG_DEC(usTmp);
			break;
		default:
			break;
		}
		iInfoLen = iGet6InfoLength(iFodo + iFodoOff, aucGrpprl);
		fail(iInfoLen <= 0);
		iFodoOff += iInfoLen;
	}
} /* end of vGet6FontInfo */

/*
 * Fill the picture information block with information
 * from a Word 6/7 file.
 * Returns TRUE when successful, otherwise FALSE
 */
static BOOL
bGet6PicInfo(int iFodo,
	const UCHAR *aucGrpprl, int iBytes, picture_block_type *pPicture)
{
	int	iFodoOff, iInfoLen;
	BOOL	bFound;
	UCHAR	ucTmp;

	TRACE_MSG("vGet6PicInfo");

	fail(iFodo < 0 || aucGrpprl == NULL || pPicture == NULL);

	iFodoOff = 0;
	bFound = FALSE;
	while (iBytes >= iFodoOff + 1) {
		switch (ucGetByte(iFodo + iFodoOff, aucGrpprl)) {
		case  68:	/* fcPic */
			pPicture->ulPictureOffset = ulGetLong(
					iFodo + iFodoOff + 2, aucGrpprl);
			bFound = TRUE;
			break;
#if 0
		case  71:	/* fData */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			if (ucTmp == 0x01) {
				/* Not a picture, but a form field */
				return FALSE;
			}
			DBG_DEC_C(ucTmp != 0, ucTmp);
			break;
#endif
		case  75:	/* fOle2 */
			ucTmp = ucGetByte(iFodo + iFodoOff + 1, aucGrpprl);
			if (ucTmp == 0x01) {
				/* Not a picture, but an OLE object */
				return FALSE;
			}
			DBG_DEC_C(ucTmp != 0, ucTmp);
			break;
		default:
			break;
		}
		iInfoLen = iGet6InfoLength(iFodo + iFodoOff, aucGrpprl);
		fail(iInfoLen <= 0);
		iFodoOff += iInfoLen;
	}
	return bFound;
} /* end of bGet6PicInfo */

/*
 * Build the lists with Character Information for Word 6/7 files
 */
void
vGet6ChrInfo(FILE *pFile, ULONG ulStartBlock,
	const ULONG *aulBBD, size_t tBBDLen, const UCHAR *aucHeader)
{
	font_block_type		tFont;
	picture_block_type	tPicture;
	USHORT	*ausCharPage;
	UCHAR	*aucBuffer;
	ULONG	ulFileOffset, ulCharPos, ulBeginCharInfo;
	size_t	tCharInfoLen, tOffset, tSize, tLenOld, tLen, tCharPageNum;
	size_t	tIndex, tIndex2, tRun;
	int	iFodo, iLen;
	USHORT	usCharFirstPage, usCount, usIstd;
	UCHAR	aucFpage[BIG_BLOCK_SIZE];

	fail(pFile == NULL || aucHeader == NULL);
	fail(ulStartBlock > MAX_BLOCKNUMBER && ulStartBlock != END_OF_CHAIN);
	fail(aulBBD == NULL);

	ulBeginCharInfo = ulGetLong(0xb8, aucHeader); /* fcPlcfbteChpx */
	NO_DBG_HEX(lBeginCharInfo);
	tCharInfoLen = (size_t)ulGetLong(0xbc, aucHeader); /* lcbPlcfbteChpx */
	NO_DBG_DEC(tCharInfoLen);
	if (tCharInfoLen < 4) {
		DBG_DEC(tCharInfoLen);
		return;
	}

	aucBuffer = xmalloc(tCharInfoLen);
	if (!bReadBuffer(pFile, ulStartBlock,
			aulBBD, tBBDLen, BIG_BLOCK_SIZE,
			aucBuffer, ulBeginCharInfo, tCharInfoLen)) {
		aucBuffer = xfree(aucBuffer);
		return;
	}

	tLen = (tCharInfoLen - 4) / 6;
	ausCharPage = xcalloc(tLen, sizeof(USHORT));
	for (tIndex = 0, tOffset = (tLen + 1) * 4;
	     tIndex < tLen;
	     tIndex++, tOffset += 2) {
		 ausCharPage[tIndex] = usGetWord(tOffset, aucBuffer);
		 NO_DBG_DEC(ausCharPage[tIndex]);
	}
	DBG_HEX(ulGetLong(0, aucBuffer));
	aucBuffer = xfree(aucBuffer);
	tCharPageNum = (size_t)usGetWord(0x18e, aucHeader); /* cpnBteChp */
	DBG_DEC(tCharPageNum);
	if (tLen < tCharPageNum) {
		/* Replace CharPage by a longer version */
		tLenOld = tLen;
		usCharFirstPage = usGetWord(0x18a, aucHeader); /* pnChrFirst */
		DBG_DEC(usCharFirstPage);
		tLen += tCharPageNum - 1;
		tSize = tLen * sizeof(USHORT);
		ausCharPage = xrealloc(ausCharPage, tSize);
		/* Add new values */
		usCount = usCharFirstPage + 1;
		for (tIndex = tLenOld; tIndex < tLen; tIndex++) {
			ausCharPage[tIndex] = usCount;
			NO_DBG_DEC(ausCharPage[tIndex]);
			usCount++;
		}
	}

	for (tIndex = 0; tIndex < tLen; tIndex++) {
		if (!bReadBuffer(pFile, ulStartBlock,
				aulBBD, tBBDLen, BIG_BLOCK_SIZE,
				aucFpage,
				(ULONG)ausCharPage[tIndex] * BIG_BLOCK_SIZE,
				BIG_BLOCK_SIZE)) {
			break;
		}
		tRun = (size_t)ucGetByte(0x1ff, aucFpage);
		NO_DBG_DEC(tRun);
		for (tIndex2 = 0; tIndex2 < tRun; tIndex2++) {
		  	ulCharPos = ulGetLong(tIndex2 * 4, aucFpage);
			ulFileOffset = ulCharPos2FileOffset(ulCharPos);
			iFodo = 2 * (int)ucGetByte(
				(tRun + 1) * 4 + tIndex2, aucFpage);

			iLen = (int)ucGetByte(iFodo, aucFpage);

			usIstd = usGetIstd(ulFileOffset);
			vFillFontFromStylesheet(usIstd, &tFont);
			if (iFodo != 0) {
				vGet6FontInfo(iFodo, usIstd,
					aucFpage + 1, iLen - 1, &tFont);
			}
			tFont.ulFileOffset = ulFileOffset;
			vAdd2FontInfoList(&tFont);

			if (iFodo <= 0) {
				continue;
			}

			(void)memset(&tPicture, 0, sizeof(tPicture));
			if (bGet6PicInfo(iFodo, aucFpage + 1,
						iLen - 1, &tPicture)) {
				tPicture.ulFileOffset = ulFileOffset;
				tPicture.ulFileOffsetPicture =
					ulDataPos2FileOffset(
						tPicture.ulPictureOffset);
				vAdd2PictInfoList(&tPicture);
			}
		}
	}
	ausCharPage = xfree(ausCharPage);
} /* end of vGet6ChrInfo */