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/*
* Copyright (c) 2007-2010, Erik Lindroos <gliptic@gmail.com>
* Copyright (c) 2012, Martin Erik Werner <martinerikwerner@gmail.com>
* This software is released under the The BSD-2-Clause License:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
// Compile via: g++ -c -lSDL binReader.cpp
#include <stdexcept>
// Needed for cross-platform *int32 definitions
#include <SDL/SDL.h>
#include "binReader.hpp"
using namespace std;
void checkedFread(void* ptr, size_t size, size_t count, FILE* f)
{
if(fread(ptr, size, count, f) != count)
throw runtime_error("fread failed to read fully");
}
string readPascalString(FILE* f)
{
unsigned char length;
checkedFread(&length, 1, 1, f);
char txt[256];
checkedFread(txt, 1, length, f);
return string(txt, length);
}
string readPascalString(FILE* f, unsigned char fieldLen)
{
char txt[256];
checkedFread(txt, 1, fieldLen, f);
unsigned char length = static_cast<unsigned char>(txt[0]);
return string(txt + 1, length);
}
void writePascalString(FILE* f, string const& str, unsigned char fieldLen)
{
int len = int(str.size() < fieldLen ? str.size() : fieldLen - 1);
size_t zeroes = fieldLen - 1 - len;
fputc(len, f);
fwrite(str.data(), 1, len, f);
for(size_t i = 0; i < zeroes; ++i)
fputc(0, f);
}
string readPascalStringAt(FILE* f, int location)
{
unsigned char length;
fseek(f, location, SEEK_SET);
checkedFread(&length, 1, 1, f);
char txt[256];
checkedFread(txt, 1, length, f);
return string(txt, length);
}
Uint32 readUint8(FILE* f)
{
unsigned char temp[1];
checkedFread(temp, 1, 1, f);
return temp[0];
}
void writeUint8(FILE* f, Uint32 v)
{
fputc(v & 0xff, f);
}
Sint32 readSint8(FILE* f)
{
char temp[1];
checkedFread(temp, 1, 1, f);
return temp[0];
}
Uint32 readUint16(FILE* f)
{
unsigned char temp[2];
checkedFread(temp, 1, 2, f);
return temp[0] + (temp[1] << 8);
}
void writeUint16(FILE* f, Uint32 v)
{
fputc(v & 0xff, f);
fputc((v >> 8) & 0xff, f);
}
Sint32 readSint16(FILE* f)
{
unsigned char temp[2];
checkedFread(temp, 1, 2, f);
return temp[0] + (static_cast<char>(temp[1]) << 8);
}
Uint32 readUint32(FILE* f)
{
unsigned char temp[4];
checkedFread(temp, 1, 4, f);
return temp[0] + (temp[1] << 8) + (temp[2] << 16) + (temp[3] << 24);
}
Sint32 readSint32(FILE* f)
{
unsigned char temp[4];
checkedFread(temp, 1, 4, f);
return temp[0] + (temp[1] << 8) + (temp[2] << 16) + (static_cast<char>(temp[3]) << 24);
}
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