+++ /dev/null
-
-/*] Copyright (c) 2009-2010, Charles McGarvey [**************************
-**] All rights reserved.
-*
-* vi:ts=4 sw=4 tw=75
-*
-* Distributable under the terms and conditions of the 2-clause BSD license;
-* see the file COPYING for a complete text of the license.
-*
-**************************************************************************/
-
-#include "../config.h"
-
-#include <algorithm>
-#if HAVE_BYTESWAP_H
-#include <byteswap.h>
-#endif
-#include <cstdlib>
-
-#if HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-
-#include <SDL/SDL.h>
-
-#include "Packet.hh"
-
-
-#ifndef bswap_16
-#define bswap_16(x) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
-#endif
-
-#ifndef bswap_32
-#define bswap_32(x) ((((x) & 0xff000000) >> 24) | \
- (((x) & 0x00ff0000) >> 8) | \
- (((x) & 0x0000ff00) << 8) | \
- (((x) & 0x000000ff) << 24))
-#endif
-
-#ifndef bswap_64
-#define bswap_64(x) (((x) << 56) | \
- (((x) << 40) & 0xff000000000000ULL) | \
- (((x) << 24) & 0xff0000000000ULL) | \
- (((x) << 8) & 0xff00000000ULL) | \
- (((x) >> 8) & 0xff000000ULL) | \
- (((x) >> 24) & 0xff0000ULL) | \
- (((x) >> 40) & 0xff00ULL) | \
- ((x) >> 56))
-#endif
-
-
-#if !HAVE_ARPA_INET_H
-static uint16_t htons(uint16_t x)
-{
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
- return bswap_16(x);
-#else
- return x;
-#endif
-}
-static uint16_t ntohs(uint16_t x)
-{
- return htons(x);
-}
-
-static uint32_t htonl(uint32_t x)
-{
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
- return bswap_32(x);
-#else
- return x;
-#endif
-}
-static uint32_t ntohl(uint32_t x)
-{
- return htonl(x);
-}
-#endif
-
-
-static uint64_t htonll(uint64_t x)
-{
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
- return bswap_64(x);
-#else
- return x;
-#endif
-}
-static uint64_t ntohll(uint64_t x)
-{
- return htonll(x);
-}
-
-
-namespace Mf {
-
-
-Packet::Packet(size_t size) :
- mBuffer((char*)malloc(size)),
- mSize(size),
- mR(0),
- mW(0),
- mOriginalW(0),
- mBoolR(0),
- mBoolW(0),
- mBoolNumR(0),
- mBoolNumW(0) {}
-
-Packet::Packet(const char* data, size_t size) :
- mBuffer((char*)malloc(size)),
- mSize(size),
- mR(0),
- mW(size),
- mOriginalW(size),
- mBoolR(0),
- mBoolW(0),
- mBoolNumR(0),
- mBoolNumW(0)
-{
- if (mBuffer) memcpy(mBuffer, data, size);
- else throw std::length_error("out of memory");
-}
-
-
-Packet::Packet(const Packet& copy) :
- mBuffer((char*)malloc(copy.mSize)),
- mSize(copy.mSize),
- mR(copy.mR),
- mW(copy.mW),
- mOriginalW(copy.mOriginalW),
- mBoolR(copy.mBoolR),
- mBoolW(copy.mBoolW),
- mBoolNumR(copy.mBoolNumR),
- mBoolNumW(copy.mBoolNumW)
-{
- if (mBuffer) memcpy(mBuffer, copy.mBuffer, mSize);
- else throw std::length_error("out of memory");
-}
-
-Packet& Packet::operator=(const Packet& copy)
-{
- free(mBuffer);
-
- mBuffer = (char*)malloc(copy.mSize);
- mSize = copy.mSize;
- mR = copy.mR;
- mW = copy.mW;
- mOriginalW = copy.mOriginalW;
- mBoolR = copy.mBoolR;
- mBoolW = copy.mBoolW;
- mBoolNumR = copy.mBoolNumR;
- mBoolNumW = copy.mBoolNumW;
- if (mBuffer) memcpy(mBuffer, copy.mBuffer, mSize);
- else throw std::length_error("out of memory");
- return *this;
-}
-
-
-Packet::~Packet()
-{
- free(mBuffer);
-}
-
-
-Packet& Packet::operator<<(bool value)
-{
- int bit = mBoolNumW % 8;
- if (bit == 0)
- {
- mBoolW = mW;
-
- unsigned char byte = 0;
- if (write(&byte, 1) == 0) throw std::length_error("out of memory");
- }
-
- if (value) mBuffer[mBoolW] |= (1 << bit);
- ++mBoolNumW;
-
- return *this;
-}
-
-
-Packet& Packet::operator<<(int8_t value)
-{
- return *this << reinterpret_cast<uint8_t&>(value);
-}
-
-Packet& Packet::operator<<(int16_t value)
-{
- return *this << reinterpret_cast<uint16_t&>(value);
-}
-
-Packet& Packet::operator<<(int32_t value)
-{
- return *this << reinterpret_cast<uint32_t&>(value);
-}
-
-Packet& Packet::operator<<(int64_t value)
-{
- return *this << reinterpret_cast<uint64_t&>(value);
-}
-
-
-Packet& Packet::operator<<(uint8_t value)
-{
- if (write(&value, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-Packet& Packet::operator<<(uint16_t value)
-{
- value = htons(value);
- if (write(&value, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-Packet& Packet::operator<<(uint32_t value)
-{
- value = htonl(value);
- if (write(&value, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-Packet& Packet::operator<<(uint64_t value)
-{
- value = htonll(value);
- if (write(&value, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-Packet& Packet::operator<<(float value)
-{
- // XXX: assumes the ieee-754
- uint32_t* integer = reinterpret_cast<uint32_t*>(&value);
- *integer = htonl(*integer);
- if (write(integer, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-Packet& Packet::operator<<(double value)
-{
- // XXX: assumes the ieee-754
- uint64_t* integer = reinterpret_cast<uint64_t*>(&value);
- *integer = htonll(*integer);
- if (write(integer, sizeof(value)) != sizeof(value))
- {
- throw std::length_error("out of memory");
- }
- return *this;
-}
-
-size_t Packet::write(const void* bytes, size_t size)
-{
- size_t nBytes = std::min(size, mSize - mW);
- if (!mBuffer || nBytes < size)
- {
- int nPages = 1 + size / PAGE_SIZE;
- int newSize = mSize + nPages * PAGE_SIZE;
- char* newBuffer = (char*)realloc(mBuffer, newSize);
- if (newBuffer)
- {
- mBuffer = newBuffer;
- mSize = newSize;
- nBytes = size;
- }
- if (!mBuffer) return 0;
- }
- memcpy(mBuffer + mW, bytes, nBytes);
- mW += nBytes;
- return nBytes;
-}
-
-
-Packet& Packet::operator>>(bool& value)
-{
- int bit = mBoolNumR % 8;
- if (bit == 0)
- {
- mBoolR = mR;
-
- unsigned char byte = 0;
- if (read(&byte, 1) == 0) throw std::out_of_range("end of packet");
- }
-
- value = 1 & (mBuffer[mBoolR] >> bit);
- ++mBoolNumR;
-
- return *this;
-}
-
-Packet& Packet::operator>>(int8_t& value)
-{
- return *this >> reinterpret_cast<uint8_t&>(value);
-}
-
-Packet& Packet::operator>>(int16_t& value)
-{
- return *this >> reinterpret_cast<uint16_t&>(value);
-}
-
-Packet& Packet::operator>>(int32_t& value)
-{
- return *this >> reinterpret_cast<uint32_t&>(value);
-}
-
-Packet& Packet::operator>>(int64_t& value)
-{
- return *this >> reinterpret_cast<uint64_t&>(value);
-}
-
-Packet& Packet::operator>>(uint8_t& value)
-{
- if (read(&value, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- return *this;
-}
-
-Packet& Packet::operator>>(uint16_t& value)
-{
- if (read(&value, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- value = ntohs(value);
- return *this;
-}
-
-Packet& Packet::operator>>(uint32_t& value)
-{
- if (read(&value, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- value = ntohl(value);
- return *this;
-}
-
-Packet& Packet::operator>>(uint64_t& value)
-{
- if (read(&value, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- value = ntohll(value);
- return *this;
-}
-
-Packet& Packet::operator>>(float& value)
-{
- // XXX: assumes the ieee-754
- uint32_t* integer = reinterpret_cast<uint32_t*>(&value);
- if (read(integer, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- *integer = htonl(*integer);
- return *this;
-}
-
-Packet& Packet::operator>>(double& value)
-{
- // XXX: assumes the ieee-754
- uint64_t* integer = reinterpret_cast<uint64_t*>(&value);
- if (read(integer, sizeof(value)) != sizeof(value))
- {
- throw std::out_of_range("end of packet");
- }
- *integer = htonll(*integer);
- return *this;
-}
-
-size_t Packet::read(void* bytes, size_t size)
-{
- size_t nBytes = std::min(size, mW - mR);
- memcpy(bytes, mBuffer + mR, nBytes);
- mR += nBytes;
- return nBytes;
-}
-
-
-void Packet::clear()
-{
- mR = 0;
- mW = 0;
- mBoolR = 0;
- mBoolW = 0;
- mBoolNumR = 0;
- mBoolNumW = 0;
-}
-
-
-void Packet::reset()
-{
- mR = 0;
- mW = mOriginalW;
- mBoolR = 0;
- mBoolW = 0;
- mBoolNumR = 0;
- mBoolNumW = 0;
-}
-
-
-} // namespace Mf
-
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