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/*
reads input data
Copyright (C) 1999 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#include "fileInputStream.h"
#include <iostream>
using namespace std;
FileInputStream::FileInputStream() {
file=NULL;
lopen=false;
fileLen=0;
}
FileInputStream::~FileInputStream() {
close();
}
int FileInputStream::open(const char* dest) {
close();
if (dest == NULL) {
return false;
}
setUrl(dest);
if (strlen(dest) == 1) {
if (strncmp(dest,"-",1)==0) {
file=::fdopen(0,"rb");
}
}
// load out of current dir if no full path is given
if (file == NULL) {
file=fopen(dest,"rb");
}
fileLen=0;
if (file == NULL) {
cout <<"cannot open file:"<< dest<<endl;
} else {
lopen=true;
struct stat fileStat;
stat(dest,&fileStat);
fileLen=(long)fileStat.st_size;
}
int back=(file!=NULL);
return back;
}
void FileInputStream::close() {
if (isOpen()) {
::fclose(file);
file=NULL;
lopen=false;
}
}
int FileInputStream::isOpen() {
return lopen;
}
int FileInputStream::eof() {
if (isOpen()==false){
return true;
}
int back=true;
if (file != NULL) {
back=feof(file);
}
return back;
}
int FileInputStream::read(char* ptr,int size) {
int bytesRead=-1;
if (isOpen()) {
if (size <= 0) {
cout << "size is <= 0!"<<endl;
return 0;
}
if (file != NULL) {
bytesRead=fread(ptr,1,size,file);
}
} else {
cerr << "read on not open file want:"<<size<<endl;
return 0;
}
return bytesRead;
}
int FileInputStream::seek(long posInBytes) {
int back=true;
if (isOpen()==false) {
return false;
}
long pos=-1;
if (file != NULL) {
pos=fseek(file,posInBytes,SEEK_SET);
}
if (pos < 0) {
cout <<"seek error in FileInputStream::seek"<<endl;
back=false;
}
return back;
}
long FileInputStream::getByteLength() {
return fileLen;
}
long FileInputStream::getBytePosition() {
int back=0;
if (isOpen()) {
if (file != NULL) {
back=ftell(file);
}
}
return back;
}
void FileInputStream::print() {
printf("pos in file:%8x\n",(int)getBytePosition());
}
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