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#include "stdafx.h"
#include "FileOutputBuffer.h"
const int MAXPEROUTPUTLINE = 10000;
const unsigned int MINBUFFERSIZE = 100000;
FileOutputBuffer::FileOutputBuffer(void)
{
this->caBuffer = NULL;
this->caBufp = NULL;//pointer point to a location of caBuffer, (don't delete)
this->uiCapacity = 0;
this->uiSize = 0;
}
FileOutputBuffer::FileOutputBuffer(unsigned int uiCapacity, ofstream* pofile)
{
this->uiCapacity = uiCapacity;
if (uiCapacity < MINBUFFERSIZE) {
cout << "The buffer is set to the minimum" << MINBUFFERSIZE << endl;
this->uiCapacity = MINBUFFERSIZE;
}
this->caBuffer = new char [uiCapacity];
memset(this->caBuffer, 0x00, sizeof(char)*uiCapacity);
this->pofile = pofile;
this->uiSize = 0;
this->caBufp = this->caBuffer;//point to start2
}
FileOutputBuffer::~FileOutputBuffer(void)
{
if (this->uiSize > 0) {
this->fflush();
// (*this->pofile) << "\n";
}
if (this->pofile != NULL) {
if ((*this->pofile).good()) {
(*this->pofile).close();
}
}
delete [] this->caBuffer;
}
void FileOutputBuffer::UpdateSize()
{
for (; this->uiSize < this->uiCapacity; this->uiSize++) {
if (this->caBuffer[this->uiSize] == 0) { //if it firstly meet to unwritten part
this->caBufp = &(this->caBuffer[this->uiSize]);
break;
}
}
if (this->uiSize > this->uiCapacity - MAXPEROUTPUTLINE) { //write to file before it is overflow
this->fflush();
}
}
void FileOutputBuffer::fflush(void)
{
(*pofile) << this->caBuffer; // output to file
memset(this->caBuffer, 0x00, sizeof(char)*uiCapacity);//flush buffer
this->uiSize = 0;
this->caBufp = this->caBuffer;//point to start
}
void FileOutputBuffer::removeEndBlankLine(void)
{
while (this->uiSize > 0) {
//if the last character is a new line
if (this->caBuffer[this->uiSize - 1] == '\n') {
this->uiSize--;
this->caBufp = &this->caBuffer[this->uiSize];
this->caBufp[0] = 0;
} else {
break;
}
}
}
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