/**********************************************************************
* TABRawBinBlock::ReadFromFile()
*
* Load data from the specified file location and initialize the block.
*
* Returns 0 if successful or -1 if an error happened, in which case
* CPLError() will have been called.
**********************************************************************/
int TABRawBinBlock::ReadFromFile(VSILFILE *fpSrc, int nOffset,
int nSize)
{
if (fpSrc == NULL || nSize == 0)
{
CPLError(CE_Failure, CPLE_AssertionFailed,
"TABRawBinBlock::ReadFromFile(): Assertion Failed!");
return -1;
}
m_fp = fpSrc;
VSIFSeekL(fpSrc, 0, SEEK_END);
m_nFileSize = (int)VSIFTellL(m_fp);
m_nFileOffset = nOffset;
m_nCurPos = 0;
m_bModified = FALSE;
/*----------------------------------------------------------------
* Alloc a buffer to contain the data
*---------------------------------------------------------------*/
GByte *pabyBuf = (GByte*)CPLMalloc(nSize*sizeof(GByte));
/*----------------------------------------------------------------
* Read from the file
*---------------------------------------------------------------*/
if (VSIFSeekL(fpSrc, nOffset, SEEK_SET) != 0 ||
(m_nSizeUsed = static_cast<int>(VSIFReadL(pabyBuf, sizeof(GByte), nSize, fpSrc)) ) == 0 ||
(m_bHardBlockSize && m_nSizeUsed != nSize ) )
{
CPLError(CE_Failure, CPLE_FileIO,
"ReadFromFile() failed reading %d bytes at offset %d.",
nSize, nOffset);
CPLFree(pabyBuf);
return -1;
}
/*----------------------------------------------------------------
* Init block with the data we just read
*---------------------------------------------------------------*/
return InitBlockFromData(pabyBuf, nSize, m_nSizeUsed,
FALSE, fpSrc, nOffset);
}
/**********************************************************************
* TABRawBinBlock::ReadFromFile()
*
* Load data from the specified file location and initialize the block.
*
* Returns 0 if succesful or -1 if an error happened, in which case
* CPLError() will have been called.
**********************************************************************/
int TABRawBinBlock::ReadFromFile(FILE *fpSrc, int nOffset,
int nSize /*= 512*/)
{
GByte *pabyBuf;
if (fpSrc == NULL || nSize == 0)
{
CPLError(CE_Failure, CPLE_AssertionFailed,
"TABRawBinBlock::ReadFromFile(): Assertion Failed!");
return -1;
}
m_fp = fpSrc;
m_nFileOffset = nOffset;
m_nCurPos = 0;
m_bModified = FALSE;
/*----------------------------------------------------------------
* Alloc a buffer to contain the data
*---------------------------------------------------------------*/
pabyBuf = (GByte*)CPLMalloc(nSize*sizeof(GByte));
/*----------------------------------------------------------------
* Read from the file
*---------------------------------------------------------------*/
if (VSIFSeek(fpSrc, nOffset, SEEK_SET) != 0 ||
(m_nSizeUsed = VSIFRead(pabyBuf, sizeof(GByte), nSize, fpSrc) ) == 0 ||
(m_bHardBlockSize && m_nSizeUsed != nSize ) )
{
CPLError(CE_Failure, CPLE_FileIO,
"ReadFromFile() failed reading %d bytes at offset %d.",
nSize, nOffset);
return -1;
}
/*----------------------------------------------------------------
* Init block with the data we just read
*---------------------------------------------------------------*/
return InitBlockFromData(pabyBuf, nSize, FALSE, fpSrc, nOffset);
}
