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/*++
Module Name:
GenericFile_stdio.cpp
Abstract:
Generic IO class for SNAP that can read from stdio.
Authors:
Jeremy Elson, February 2014
Environment:
User mode service.
Revision History:
--*/
#include "stdafx.h"
#include "Compat.h"
#include "GenericFile_stdio.h"
#include "Error.h"
GenericFile_stdio::GenericFile_stdio()
{
_file = NULL;
}
GenericFile_stdio::~GenericFile_stdio()
{
}
GenericFile_stdio *GenericFile_stdio::open(const char *filename, Mode mode)
{
GenericFile_stdio *retval = new GenericFile_stdio();
retval->_mode = mode;
const char *fMode = NULL;
switch (mode) {
case ReadOnly:
fMode = "rb";
break;
case WriteOnly:
fMode = "wb";
break;
}
retval->_file = fopen(filename, fMode);
if (retval->_file == NULL) {
delete retval;
return NULL;
}
return retval;
}
GenericFile_stdio *GenericFile_stdio::open(const char *filename)
{
return open(filename, ReadOnly);
}
size_t GenericFile_stdio::read(void *ptr, size_t count)
{
return fread(ptr, 1, count, _file);
}
int GenericFile_stdio::getchar()
{
return fgetc(_file);
}
char *GenericFile_stdio::gets(char *buf, size_t count)
{
return fgets(buf, (int) count, _file);
}
int GenericFile_stdio::advance(long long offset)
{
return _fseek64bit(_file, offset, SEEK_CUR);
}
void GenericFile_stdio::close()
{
fclose(_file);
}
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