121 lines
2.4 KiB
C++
121 lines
2.4 KiB
C++
/*
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Copyright (c) 2013 yvt
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This file is part of OpenSpades.
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OpenSpades is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenSpades is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenSpades. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "StdStream.h"
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#include "Exception.h"
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#ifndef _MSC_VER
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#include <unistd.h>
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#else
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#include <io.h>
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#define ftruncate _chsize
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#define fileno _fileno
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#endif
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#include "Debug.h"
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namespace spades {
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StdStream::StdStream(FILE *f, bool ac):
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handle(f), autoClose(ac){
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SPADES_MARK_FUNCTION();
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if(!f)
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SPInvalidArgument("f");
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}
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StdStream::~StdStream(){
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SPADES_MARK_FUNCTION();
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if(autoClose)
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fclose(handle);
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}
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int StdStream::ReadByte() {
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SPADES_MARK_FUNCTION();
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int ret = fgetc(handle);
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if(ret == EOF){
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if(ferror(handle)){
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SPRaise("I/O error.");
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}else{
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return -1;
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}
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}else{
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return ret;
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}
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}
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size_t StdStream::Read(void *buf, size_t bytes){
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SPADES_MARK_FUNCTION_DEBUG();
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return fread(buf, 1, bytes, handle);
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}
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void StdStream::WriteByte(int byte) {
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SPADES_MARK_FUNCTION();
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if(fputc(byte, handle) != 0){
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SPRaise("I/O error.");
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}
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}
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void StdStream::Write(const void *buf, size_t bytes){
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SPADES_MARK_FUNCTION();
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if(fwrite(buf, 1, bytes, handle) < bytes){
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SPRaise("I/O error.");
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}
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}
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uint64_t StdStream::GetPosition() {
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SPADES_MARK_FUNCTION_DEBUG();
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return ftell(handle);
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}
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void StdStream::SetPosition(uint64_t pos){
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SPADES_MARK_FUNCTION();
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if(pos > 0x7fffffffULL){
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SPRaise("Currently StdStream doesn't support 64-bit offset.");
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}
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fseek(handle, (long)pos, SEEK_SET);
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}
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uint64_t StdStream::GetLength() {
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SPADES_MARK_FUNCTION();
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uint64_t opos = GetPosition();
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fseek(handle, 0, SEEK_END);
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uint64_t len = GetPosition();
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SetPosition(opos);
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return len;
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}
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void StdStream::SetLength(uint64_t len) {
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SPADES_MARK_FUNCTION_DEBUG();
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// this is not safe
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ftruncate(fileno(handle), len);
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}
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void StdStream::Flush() {
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fflush(handle);
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}
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}
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