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