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dBASE: put back an array for trailer

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since except language code, the other information aren't used
but keep the details in comment

Change-Id: Ibb5bf22e88bd3a5f9c7603ad018cada8add8b2ce
Reviewed-on: https://gerrit.libreoffice.org/38799
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>
This commit is contained in:
Julien Nabet
2017-06-14 19:13:22 +02:00
parent df2f811673
commit 5435e2b2aa
2 changed files with 26 additions and 48 deletions
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35
connectivity/source/drivers/dbase/DTable.cxx
View File

@@ -222,35 +222,7 @@ void ODbaseTable::readHeader()
if (m_aHeader.recordLength == 0)
throwInvalidDbaseFormat();
m_pFileStream->ReadBytes(m_aHeader.reserved1, 2);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadUChar(m_aHeader.incompTransact);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadUChar(m_aHeader.encryptionFlag);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadBytes(m_aHeader.freeRecordThread, 4);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadBytes(m_aHeader.multiUserdBASE, 8);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadUChar(m_aHeader.MDXFlag);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadUChar(m_aHeader.languageDriver);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
m_pFileStream->ReadBytes(m_aHeader.reserved2, 2);
m_pFileStream->ReadBytes(m_aHeader.trailer, 20);
if(ERRCODE_NONE != m_pFileStream->GetErrorCode())
throwInvalidDbaseFormat();
@@ -277,9 +249,10 @@ void ODbaseTable::readHeader()
case dBaseIIIMemo:
case FoxProMemo:
m_pFileStream->SetEndian(SvStreamEndian::LITTLE);
if ( m_aHeader.languageDriver != 0x00 && getConnection()->isTextEncodingDefaulted() )
// trailer[17] corresponds to language code, see DBFHeader def in connectivity/source/inc/dbase/DTable.hxx
if ( m_aHeader.trailer[17] != 0x00 && getConnection()->isTextEncodingDefaulted() )
{
switch(m_aHeader.languageDriver)
switch(m_aHeader.trailer[17])
{
case 0x01: m_eEncoding = RTL_TEXTENCODING_IBM_437; break; // DOS USA code page 437
case 0x02: m_eEncoding = RTL_TEXTENCODING_IBM_850; break; // DOS Multilingual code page 850

39
connectivity/source/inc/dbase/DTable.hxx
View File

@@ -57,23 +57,28 @@ namespace connectivity
private:
// sources: https://www.clicketyclick.dk/databases/xbase/format/dbf.html (dBASE III and 5)
// http://www.dbase.com/KnowledgeBase/int/db7_file_fmt.htm (dBASE 7) which is similar at least for this part
struct DBFHeader {
DBFType type; // dBASE/xBASE type, see DBFType
sal_uInt8 dateElems[3]; // Date of last change (YYMMDD)
sal_uInt32 nbRecords; // Number of records
sal_uInt16 headerLength;
sal_uInt16 recordLength; // length of 1 record
sal_uInt8 reserved1[2]; // should be filled with 0
sal_uInt8 incompTransact; // Incomplete transaction (dBASE IV):
// 00h Transaction ended (or rolled back)
// 01h Transaction started
sal_uInt8 encryptionFlag; // dBASE IV: 00h not encrypted, 01h data encrypted
sal_uInt8 freeRecordThread[4]; // reserved for LAN only
sal_uInt8 multiUserdBASE[8]; // reserved for multi-user dBASE (dBASE III+)
sal_uInt8 MDXFlag; // dBASE IV 0x01 if a production .MDX file exists for this table
// 0x00 if no .MDX file exists
sal_uInt8 languageDriver; // codepage (from Foxpro)
sal_uInt8 reserved2[2]; // should be filled with 0
struct DBFHeader { // address/pos in trailer
DBFType type; // dBASE/xBASE type, see DBFType 00h
sal_uInt8 dateElems[3]; // Date of last change (YYMMDD) 01h
sal_uInt32 nbRecords; // Number of records 04h
sal_uInt16 headerLength; // 08h
sal_uInt16 recordLength; // Length of 1 record 10h
sal_uInt8 trailer[20];
// this last field contains these data:
// - reserved:2 bytes:should be filled with 0 12h/0
// - incomplete transaction:1 byte:dBASE IV 14h/2
// 00h Transaction ended (or rolled back)
// 01h Transaction started
// - encryptionFlag:1 byte: dBASE IV 15h/3
// 00h not encrypted
// 01h for encrypted
// - freeRecordThread:4 bytes:reserved for LAN only 16h/4
// - multiUserdBASE:8 bytes:reserved for multi-user dBASE (dBASE III+) 20h/8
// - MDXFlag:1 byte:dBASE IV 28h/16
// 0x01 if a production .MDX file exists for this table
// 0x00 if no .MDX file exists
// - languageDriver:1 byte:codepage (from Foxpro) 29h/17
// - reserved:2 bytes: should be filled with 0 30h/18
};
struct DBFColumn { /* Column descriptors */
sal_uInt8 db_fnm[11]; /* Field name */