prop8.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

		}
		if (iInfoLen <= 0) {
			iInfoLen =
				iGet8InfoLength(iFodo + iFodoOff, aucGrpprl);
			fail(iInfoLen <= 0);
		}
		iFodoOff += iInfoLen;
	}

	if (bFound2417_1 && bFoundd608) {
		return found_end_of_row;
	}
	if (bFound2417_0 && !bFoundd608) {
		return found_not_end_of_row;
	}
	if (bFound2416_1 || bFound244b_1) {
		return found_a_cell;
	}
	if (bFound2416_0 || bFound244b_0) {
		return found_not_a_cell;
	}
	return found_nothing;
} /* end of eGet8RowInfo */

/*
 * Fill the style information block with information
 * from a Word 8/9/10/11 file.
 */
void
vGet8StyleInfo(int iFodo,
	const UCHAR *aucGrpprl, int iBytes, style_block_type *pStyle)
{
	list_block_type	tList6;
	const list_block_type	*pList;
	int	iFodoOff, iInfoLen;
	int	iTmp, iDel, iAdd, iBefore;
	USHORT	usOpCode, usTmp;
	short	sTmp;

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

	NO_DBG_DEC_C(pStyle->usListIndex != 0, pStyle->usIstd);
	NO_DBG_DEC_C(pStyle->usListIndex != 0, pStyle->usListIndex);

	(void)memset(&tList6, 0, sizeof(tList6));

	iFodoOff = 0;
	while (iBytes >= iFodoOff + 2) {
		iInfoLen = 0;
		usOpCode = usGetWord(iFodo + iFodoOff, aucGrpprl);
		switch (usOpCode) {
		case 0x2403:	/* jc */
			pStyle->ucAlignment = ucGetByte(
					iFodo + iFodoOff + 2, aucGrpprl);
			break;
		case 0x260a:	/* ilvl */
			pStyle->ucListLevel =
				ucGetByte(iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->ucListLevel);
			pStyle->ucNumLevel = pStyle->ucListLevel;
			break;
		case 0x4600:	/* istd */
			usTmp = usGetWord(iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(usTmp);
			break;
		case 0x460b:	/* ilfo */
			pStyle->usListIndex =
				usGetWord(iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->usListIndex);
			break;
		case 0x4610: /* Nest dxaLeft */
			sTmp = (short)usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			pStyle->sLeftIndent += sTmp;
			if (pStyle->sLeftIndent < 0) {
				pStyle->sLeftIndent = 0;
			}
			DBG_DEC(sTmp);
			DBG_DEC(pStyle->sLeftIndent);
			break;
		case 0xc60d:	/* ChgTabsPapx */
		case 0xc615:	/* ChgTabs */
			iTmp = (int)ucGetByte(iFodo + iFodoOff + 2, aucGrpprl);
			if (iTmp < 2) {
				iInfoLen = 1;
				break;
			}
			NO_DBG_DEC(iTmp);
			iDel = (int)ucGetByte(iFodo + iFodoOff + 3, aucGrpprl);
			if (iTmp < 2 + 2 * iDel) {
				iInfoLen = 1;
				break;
			}
			NO_DBG_DEC(iDel);
			iAdd = (int)ucGetByte(
				iFodo + iFodoOff + 4 + 2 * iDel, aucGrpprl);
			if (iTmp < 2 + 2 * iDel + 2 * iAdd) {
				iInfoLen = 1;
				break;
			}
			NO_DBG_DEC(iAdd);
			break;
		case 0x840e:	/* dxaRight */
			pStyle->sRightIndent = (short)usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->sRightIndent);
			break;
		case 0x840f:	/* dxaLeft */
			pStyle->sLeftIndent = (short)usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->sLeftIndent);
			break;
		case 0x8411:	/* dxaLeft1 */
			pStyle->sLeftIndent1 = (short)usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->sLeftIndent1);
			break;
		case 0xa413:	/* dyaBefore */
			pStyle->usBeforeIndent = usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->usBeforeIndent);
			break;
		case 0xa414:	/* dyaAfter */
			pStyle->usAfterIndent = usGetWord(
					iFodo + iFodoOff + 2, aucGrpprl);
			NO_DBG_DEC(pStyle->usAfterIndent);
			break;
		case 0xc63e:	/* anld */
			iTmp = (int)ucGetByte(
					iFodo + iFodoOff + 2, aucGrpprl);
			DBG_DEC_C(iTmp < 84, iTmp);
			if (iTmp >= 1) {
				tList6.ucNFC = ucGetByte(
					iFodo + iFodoOff + 3, aucGrpprl);
			}
			if (tList6.ucNFC != LIST_BULLETS && iTmp >= 2) {
				iBefore = (int)ucGetByte(
					iFodo + iFodoOff + 4, aucGrpprl);
			} else {
				iBefore = 0;
			}
			if (iTmp >= 12) {
				tList6.ulStartAt = (ULONG)usGetWord(
					iFodo + iFodoOff + 13, aucGrpprl);
			}
			if (iTmp >= iBefore + 22) {
				tList6.usListChar = usGetWord(
					iFodo + iFodoOff + iBefore + 23,
					aucGrpprl);
				DBG_HEX(tList6.usListChar);
			}
			break;
		default:
			NO_DBG_HEX(usOpCode);
			break;
		}
		if (iInfoLen <= 0) {
			iInfoLen =
				iGet8InfoLength(iFodo + iFodoOff, aucGrpprl);
			fail(iInfoLen <= 0);
		}
		iFodoOff += iInfoLen;
	}

	if (pStyle->usListIndex == 2047) {
		/* Old style list */
		pStyle->usStartAt = (USHORT)tList6.ulStartAt;
		pStyle->usListChar = tList6.usListChar;
		pStyle->ucNFC = tList6.ucNFC;
	} else {
		/* New style list */
		pList = pGetListInfo(pStyle->usListIndex, pStyle->ucListLevel);
		if (pList != NULL) {
			pStyle->bNoRestart = pList->bNoRestart;
			fail(pList->ulStartAt > (ULONG)USHRT_MAX);
			pStyle->usStartAt = (USHORT)pList->ulStartAt;
			pStyle->usListChar = pList->usListChar;
			pStyle->ucNFC = pList->ucNFC;
			if (pStyle->sLeftIndent <= 0) {
				pStyle->sLeftIndent = pList->sLeftIndent;
			}
		}
	}
} /* end of vGet8StyleInfo */

/*
 * Get the left indentation value from the style information block
 *
 * Returns the value when found, otherwise 0
 */
static short
sGetLeftIndent(const UCHAR *aucGrpprl, size_t tBytes)
{
	int	iOffset, iInfoLen;
	USHORT	usOpCode, usTmp;

	fail(aucGrpprl == NULL);

	iOffset = 0;
	while (tBytes >= (size_t)iOffset + 4) {
		usOpCode = usGetWord(iOffset, aucGrpprl);
		if (usOpCode == 0x840f) {	/* dxaLeft */
			usTmp = usGetWord(iOffset + 2, aucGrpprl);
			if (usTmp <= 0x7fff) {
				NO_DBG_DEC(usTmp);
				return (short)usTmp;
			}
		}
		iInfoLen = iGet8InfoLength(iOffset, aucGrpprl);
		fail(iInfoLen <= 0);
		iOffset += iInfoLen;
	}
	return 0;
} /* end of sGetLeftIndent */

/*
 * Build the list with List Information for Word 8/9/10/11 files
 */
void
vGet8LstInfo(FILE *pFile, const pps_info_type *pPPS,
	const ULONG *aulBBD, size_t tBBDLen,
	const ULONG *aulSBD, size_t tSBDLen,
	const UCHAR *aucHeader)
{
	list_block_type	tList;
	const ULONG	*aulBlockDepot;
	UCHAR	*aucLfoInfo, *aucLstfInfo, *aucPapx, *aucXString;
	ULONG	ulBeginLfoInfo, ulBeginLstfInfo, ulBeginLvlfInfo;
	ULONG	ulListID, ulStart;
	size_t	tBlockDepotLen, tBlockSize;
	size_t	tLfoInfoLen, tLstfInfoLen, tPapxLen, tXstLen, tOff;
	size_t	tLstfRecords, tStart, tIndex;
	int	iNums;
	USHORT	usIstd;
	UCHAR	ucTmp, ucListLevel, ucMaxLevel, ucChpxLen;
	UCHAR	aucLvlfInfo[28], aucXst[2];

	fail(pFile == NULL || pPPS == NULL || aucHeader == NULL);
	fail(aulBBD == NULL || aulSBD == NULL);

	NO_DBG_DEC(pPPS->tTable.ulSB);
	NO_DBG_HEX(pPPS->tTable.ulSize);
	if (pPPS->tTable.ulSize == 0) {
		DBG_MSG("No list information");
		return;
	}

	if (pPPS->tTable.ulSize < MIN_SIZE_FOR_BBD_USE) {
		/* Use the Small Block Depot */
		aulBlockDepot = aulSBD;
		tBlockDepotLen = tSBDLen;
		tBlockSize = SMALL_BLOCK_SIZE;
	} else {
		/* Use the Big Block Depot */
		aulBlockDepot = aulBBD;
		tBlockDepotLen = tBBDLen;
		tBlockSize = BIG_BLOCK_SIZE;
	}

	/* LFO (List Format Override) */
	ulBeginLfoInfo = ulGetLong(0x2ea, aucHeader); /* fcPlfLfo */
	DBG_HEX(ulBeginLfoInfo);
	tLfoInfoLen = (size_t)ulGetLong(0x2ee, aucHeader); /* lcbPlfLfo */
	DBG_DEC(tLfoInfoLen);
	if (tLfoInfoLen == 0) {
		DBG_MSG("No lists in this document");
		return;
	}

	aucLfoInfo = xmalloc(tLfoInfoLen);
	if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
			aulBlockDepot, tBlockDepotLen, tBlockSize,
			aucLfoInfo, ulBeginLfoInfo, tLfoInfoLen)) {
		aucLfoInfo = xfree(aucLfoInfo);
		return;
	}
	NO_DBG_PRINT_BLOCK(aucLfoInfo, tLfoInfoLen);
	vBuildLfoList(aucLfoInfo, tLfoInfoLen);
	aucLfoInfo = xfree(aucLfoInfo);

	/* LSTF (LiST data on File) */
	ulBeginLstfInfo = ulGetLong(0x2e2, aucHeader); /* fcPlcfLst */
	DBG_HEX(ulBeginLstfInfo);
	tLstfInfoLen = (size_t)ulGetLong(0x2e6, aucHeader); /* lcbPlcfLst */
	DBG_DEC(tLstfInfoLen);
	if (tLstfInfoLen == 0) {
		DBG_MSG("No list data on file");
		return;
	}

	aucLstfInfo = xmalloc(tLstfInfoLen);
	if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
			aulBlockDepot, tBlockDepotLen, tBlockSize,
			aucLstfInfo, ulBeginLstfInfo, tLstfInfoLen)) {
		aucLstfInfo = xfree(aucLstfInfo);
		return;
	}
	NO_DBG_PRINT_BLOCK(aucLstfInfo, tLstfInfoLen);

	tLstfRecords = (size_t)usGetWord(0, aucLstfInfo);
	if (2 + tLstfRecords * 28 < tLstfInfoLen) {
		DBG_DEC(2 + tLstfRecords * 28);
		DBG_DEC(tLstfInfoLen);
		aucLstfInfo = xfree(aucLstfInfo);
		return;
	}

	/* LVLF (List leVeL on File) */
	ulBeginLvlfInfo = ulBeginLstfInfo + tLstfInfoLen;
	DBG_HEX(ulBeginLvlfInfo);

	aucXString = NULL;
	ulStart = ulBeginLvlfInfo;

	for (tIndex = 0, tStart = 2;
	     tIndex < tLstfRecords;
	     tIndex++, tStart += 28) {
		ulListID = ulGetLong(tStart, aucLstfInfo);
		NO_DBG_HEX(ulListID);
		ucTmp = ucGetByte(tStart + 26, aucLstfInfo);
		ucMaxLevel = odd(ucTmp) ? 1 : 9;
		for (ucListLevel = 0; ucListLevel < ucMaxLevel; ucListLevel++) {
			fail(aucXString != NULL);
			usIstd = usGetWord(
					tStart + 8 + 2 * (size_t)ucListLevel,
					aucLstfInfo);
			DBG_DEC_C(usIstd != STI_NIL, usIstd);
			NO_DBG_HEX(ulStart);
			(void)memset(&tList, 0, sizeof(tList));
			/* Read the lvlf (List leVeL on File) */
			if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
					aulBlockDepot, tBlockDepotLen,
					tBlockSize, aucLvlfInfo,
					ulStart, sizeof(aucLvlfInfo))) {
				aucLstfInfo = xfree(aucLstfInfo);
				return;
			}
			NO_DBG_PRINT_BLOCK(aucLvlfInfo, sizeof(aucLvlfInfo));
			if (bAllZero(aucLvlfInfo, sizeof(aucLvlfInfo))) {
				tList.ulStartAt = 1;
				tList.ucNFC = 0x00;
				tList.bNoRestart = FALSE;
			} else {
				tList.ulStartAt = ulGetLong(0, aucLvlfInfo);
				tList.ucNFC = ucGetByte(4, aucLvlfInfo);
				ucTmp = ucGetByte(5, aucLvlfInfo);
				tList.bNoRestart = (ucTmp & BIT(3)) != 0;
				DBG_MSG_C((ucTmp & BIT(4)) != 0 &&
					(ucTmp & BIT(6)) != 0, "Found one");
			}
			ulStart += sizeof(aucLvlfInfo);
			tPapxLen = (size_t)ucGetByte(25, aucLvlfInfo);
			if (tPapxLen != 0) {
				aucPapx = xmalloc(tPapxLen);
				/* Read the Papx */
				if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
						aulBlockDepot, tBlockDepotLen,
						tBlockSize, aucPapx,
						ulStart, tPapxLen)) {
					aucPapx = xfree(aucPapx);
					aucLstfInfo = xfree(aucLstfInfo);
					return;
				}
				NO_DBG_PRINT_BLOCK(aucPapx, tPapxLen);
				tList.sLeftIndent =
					sGetLeftIndent(aucPapx, tPapxLen);
				aucPapx = xfree(aucPapx);
			}
			ulStart += tPapxLen;
			ucChpxLen = ucGetByte(24, aucLvlfInfo);
			ulStart += (ULONG)ucChpxLen;
			/* Read the length of the XString */
			if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
					aulBlockDepot, tBlockDepotLen,
					tBlockSize, aucXst,
					ulStart, sizeof(aucXst))) {
				aucLstfInfo = xfree(aucLstfInfo);
				return;
			}
			NO_DBG_PRINT_BLOCK(aucXst, sizeof(aucXst));
			tXstLen = (size_t)usGetWord(0, aucXst);
			ulStart += sizeof(aucXst);
			if (tXstLen == 0) {
				tList.usListChar = DEFAULT_LISTCHAR;
				vAdd2ListInfoList(ulListID,
						usIstd,
						ucListLevel,
						&tList);
				continue;
			}
			tXstLen *= 2;	/* Length in chars to length in bytes */
			aucXString = xmalloc(tXstLen);
			/* Read the XString */
			if (!bReadBuffer(pFile, pPPS->tTable.ulSB,
					aulBlockDepot, tBlockDepotLen,
					tBlockSize, aucXString,
					ulStart, tXstLen)) {
				aucXString = xfree(aucXString);
				aucLstfInfo = xfree(aucLstfInfo);
				return;
			}
			NO_DBG_PRINT_BLOCK(aucXString, tXstLen);
			tOff = 0;
			for (iNums = 6; iNums < 15; iNums++) {
				ucTmp = ucGetByte(iNums, aucLvlfInfo);
				if (ucTmp == 0) {
					break;
				}
				tOff = (size_t)ucTmp;
			}
			tOff *= 2;	/* Offset in chars to offset in bytes */
			NO_DBG_DEC(tOff);
			if (tList.ucNFC == LIST_SPECIAL ||
			    tList.ucNFC == LIST_SPECIAL2 ||
			    tList.ucNFC == LIST_BULLETS) {
				tList.usListChar = usGetWord(0, aucXString);
			} else if (tOff != 0 && tOff < tXstLen) {
				tList.usListChar = usGetWord(tOff, aucXString);
			} else {
				tList.usListChar = DEFAULT_LISTCHAR;
			}
			vAdd2ListInfoList(ulListID,
					usIstd,
					ucListLevel,
					&tList);
			ulStart += tXstLen;
			aucXString = xfree(aucXString);
		}
	}
	aucLstfInfo = xfree(aucLstfInfo);
} /* end of vGet8LstInfo */

/*
 * Build the lists with Paragraph Information for Word 8/9/10/11 files
 */
void
vGet8PapInfo(FILE *pFile, const pps_info_type *pPPS,
	const ULONG *aulBBD, size_t tBBDLen,
	const ULONG *aulSBD, size_t tSBDLen,
	const UCHAR *aucHeader)
{
	row_block_type		tRow;
	style_block_type	tStyle;
	ULONG		*aulParfPage;
	UCHAR	*aucBuffer;
	ULONG	ulCharPos, ulCharPosFirst, ulCharPosLast;
	ULONG	ulBeginParfInfo;
	size_t	tParfInfoLen, tOffset, tLen;
	int	iIndex, iIndex2, iRun, iFodo, iLen;
	row_info_enum	eRowInfo;
	USHORT	usIstd;
	UCHAR	aucFpage[BIG_BLOCK_SIZE];

	fail(pFile == NULL || pPPS == NULL || aucHeader == NULL);
	fail(aulBBD == NULL || aulSBD == NULL);

	ulBeginParfInfo = ulGetLong(0x102, aucHeader); /* fcPlcfbtePapx */
	NO_DBG_HEX(ulBeginParfInfo);
	tParfInfoLen = (size_t)ulGetLong(0x106, aucHeader); /* lcbPlcfbtePapx */
	NO_DBG_DEC(tParfInfoLen);
	if (tParfInfoLen < 4) {
		DBG_DEC(tParfInfoLen);
		return;
	}

	aucBuffer = aucFillInfoBuffer(pFile, &pPPS->tTable,
			aulBBD, tBBDLen, aulSBD, tSBDLen,
			ulBeginParfInfo, tParfInfoLen);
	if (aucBuffer == NULL) {
		return;
	}
	NO_DBG_PRINT_BLOCK(aucBuffer, tParfInfoLen);

	tLen = (tParfInfoLen / 4 - 1) / 2;
	aulParfPage = xcalloc(tLen, sizeof(ULONG));
	for (iIndex = 0, tOffset = (tLen + 1) * 4;
	     iIndex < (int)tLen;
	     iIndex++, tOffset += 4) {
		 aulParfPage[iIndex] = ulGetLong(tOffset, aucBuffer);
		 NO_DBG_DEC(aulParfPage[iIndex]);
	}
	DBG_HEX(ulGetLong(0, aucBuffer));
	aucBuffer = xfree(aucBuffer);
	NO_DBG_PRINT_BLOCK(aucHeader, HEADER_SIZE);

	(void)memset(&tRow, 0, sizeof(tRow));
	ulCharPosFirst = CP_INVALID;
	for (iIndex = 0; iIndex < (int)tLen; iIndex++) {
		fail(aulParfPage[iIndex] > ULONG_MAX / BIG_BLOCK_SIZE);
		if (!bReadBuffer(pFile, pPPS->tWordDocument.ulSB,
				aulBBD, tBBDLen, BIG_BLOCK_SIZE,
				aucFpage,
				aulParfPage[iIndex] * BIG_BLOCK_SIZE,
				BIG_BLOCK_SIZE)) {
			break;
		}
		NO_DBG_PRINT_BLOCK(aucFpage, BIG_BLOCK_SIZE);
		iRun = (int)ucGetByte(0x1ff, aucFpage);
		NO_DBG_DEC(iRun);