116 lines
2.6 KiB
C++
116 lines
2.6 KiB
C++
|
// ############################################################################
|
||
|
|
// INCLUDES
|
||
|
|
#include "pch.hpp"
|
||
|
|
|
||
|
|
#include "ccsv.h"
|
||
|
|
#include "debug.h"
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
// DEFINES
|
||
|
|
#define chComma ','
|
||
|
|
#define chNewline '\n'
|
||
|
|
#define chReturn '\r'
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
//
|
||
|
|
// CCSVFile - simple file i/o for CSV files
|
||
|
|
//
|
||
|
|
CCSVFile::CCSVFile()
|
||
|
|
{
|
||
|
|
m_hFile = 0;
|
||
|
|
m_iLastRead = 0;
|
||
|
|
m_pchLast = m_pchBuf = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
CCSVFile::~CCSVFile()
|
||
|
|
{
|
||
|
|
AssertSz(!m_hFile,"CCSV file is still open");
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
BOOLEAN CCSVFile::Open(LPCSTR pszFileName)
|
||
|
|
{
|
||
|
|
AssertSz(!m_hFile, "a file is already open.");
|
||
|
|
|
||
|
|
m_hFile = CreateFile((LPCTSTR)pszFileName,
|
||
|
|
GENERIC_READ, FILE_SHARE_READ,
|
||
|
|
0, OPEN_EXISTING, 0, 0);
|
||
|
|
if (INVALID_HANDLE_VALUE == m_hFile)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
m_pchLast = m_pchBuf = NULL;
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
BOOLEAN CCSVFile::ReadToken(LPSTR psz, DWORD cbMax)
|
||
|
|
{
|
||
|
|
LPSTR pszLast;
|
||
|
|
char ch;
|
||
|
|
|
||
|
|
ch = (char) ChNext();
|
||
|
|
if (-1 == ch)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
pszLast = psz + (cbMax - 1);
|
||
|
|
while (psz < pszLast && chComma != ch && chNewline != ch && -1 != ch)
|
||
|
|
{
|
||
|
|
*psz++ = ch;
|
||
|
|
ch = (char) ChNext(); //Read in the next character
|
||
|
|
}
|
||
|
|
|
||
|
|
*psz++ = '\0';
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
void CCSVFile::Close(void)
|
||
|
|
{
|
||
|
|
if (m_hFile)
|
||
|
|
CloseHandle(m_hFile);
|
||
|
|
#ifdef DEBUG
|
||
|
|
if (!m_hFile) Dprintf("CCSVFile::Close was called, but m_hFile was already 0\n");
|
||
|
|
#endif
|
||
|
|
m_hFile = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
BOOL CCSVFile::FReadInBuffer(void)
|
||
|
|
{
|
||
|
|
//Read another buffer
|
||
|
|
#ifdef WIN16
|
||
|
|
if ((m_cchAvail = _read(m_hFile, m_rgchBuf, CCSVFILE_BUFFER_SIZE)) <= 0)
|
||
|
|
return FALSE;
|
||
|
|
#else
|
||
|
|
if (!ReadFile(m_hFile, m_rgchBuf, CCSVFILE_BUFFER_SIZE, &m_cchAvail, NULL) || !m_cchAvail)
|
||
|
|
{
|
||
|
|
return FALSE; //nothing more to read
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
m_pchBuf = m_rgchBuf;
|
||
|
|
m_pchLast = m_pchBuf + m_cchAvail;
|
||
|
|
|
||
|
|
return TRUE; //success
|
||
|
|
}
|
||
|
|
|
||
|
|
// ############################################################################
|
||
|
|
inline int CCSVFile::ChNext(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
LNextChar:
|
||
|
|
if (m_pchBuf >= m_pchLast && !FReadInBuffer()) //implies that we finished reading the buffer. Read in some more.
|
||
|
|
return -1; //nothing more to read
|
||
|
|
|
||
|
|
m_iLastRead = *m_pchBuf++;
|
||
|
|
if (chReturn == m_iLastRead)
|
||
|
|
goto LNextChar; //faster to NOT make extra function call
|
||
|
|
|
||
|
|
return m_iLastRead;
|
||
|
|
}
|