mirror of
https://github.com/danog/libtgvoip.git
synced 2024-11-27 04:34:42 +01:00
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#include "BufferOutputStream.h"
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#include <stdexcept>
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#include <string.h>
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using namespace tgvoip;
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BufferOutputStream::BufferOutputStream(size_t size){
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buffer=(unsigned char*) malloc(size);
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offset=0;
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this->size=size;
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bufferProvided=false;
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}
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BufferOutputStream::BufferOutputStream(unsigned char *buffer, size_t size){
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this->buffer=buffer;
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this->size=size;
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offset=0;
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bufferProvided=true;
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}
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BufferOutputStream::~BufferOutputStream(){
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if(!bufferProvided)
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free(buffer);
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}
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void BufferOutputStream::WriteByte(unsigned char byte){
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this->ExpandBufferIfNeeded(1);
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buffer[offset++]=byte;
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}
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void BufferOutputStream::WriteInt32(int32_t i){
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this->ExpandBufferIfNeeded(4);
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buffer[offset+3]=(unsigned char)((i >> 24) & 0xFF);
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buffer[offset+2]=(unsigned char)((i >> 16) & 0xFF);
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buffer[offset+1]=(unsigned char)((i >> 8) & 0xFF);
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buffer[offset]=(unsigned char)(i & 0xFF);
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offset+=4;
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}
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void BufferOutputStream::WriteInt64(int64_t i){
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this->ExpandBufferIfNeeded(8);
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buffer[offset+7]=(unsigned char)((i >> 56) & 0xFF);
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buffer[offset+6]=(unsigned char)((i >> 48) & 0xFF);
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buffer[offset+5]=(unsigned char)((i >> 40) & 0xFF);
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buffer[offset+4]=(unsigned char)((i >> 32) & 0xFF);
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buffer[offset+3]=(unsigned char)((i >> 24) & 0xFF);
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buffer[offset+2]=(unsigned char)((i >> 16) & 0xFF);
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buffer[offset+1]=(unsigned char)((i >> 8) & 0xFF);
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buffer[offset]=(unsigned char)(i & 0xFF);
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offset+=8;
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}
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void BufferOutputStream::WriteInt16(int16_t i){
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this->ExpandBufferIfNeeded(2);
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buffer[offset+1]=(unsigned char)((i >> 8) & 0xFF);
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buffer[offset]=(unsigned char)(i & 0xFF);
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offset+=2;
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}
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void BufferOutputStream::WriteBytes(unsigned char *bytes, size_t count){
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this->ExpandBufferIfNeeded(count);
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memcpy(buffer+offset, bytes, count);
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offset+=count;
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}
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unsigned char *BufferOutputStream::GetBuffer(){
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return buffer;
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}
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size_t BufferOutputStream::GetLength(){
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return offset;
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}
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void BufferOutputStream::ExpandBufferIfNeeded(size_t need){
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if(offset+need>size){
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if(bufferProvided){
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throw std::out_of_range("buffer overflow");
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}
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if(need<1024){
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buffer=(unsigned char *) realloc(buffer, size+1024);
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size+=1024;
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}else{
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buffer=(unsigned char *) realloc(buffer, size+need);
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size+=need;
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}
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}
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}
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void BufferOutputStream::Reset(){
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offset=0;
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}
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