text: /*
  Copyright (C) 2009-2010 DeSmuME team
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  */
  
  #include <vector>
  #include "emufile.h"
  #include "utils/xstring.h"
  
  bool EMUFILE::readAllBytes(std::vector<u8>* dstbuf, const std::string& fname)
  {
  	EMUFILE_FILE file(fname.c_str(),"rb");
  	if(file.fail()) return false;
  	int size = file.size();
  	dstbuf->resize(size);
  	file.fread(&dstbuf->at(0),size);
  	return true;
  }
  
  size_t EMUFILE_MEMORY::_fread(const void *ptr, size_t bytes){
  	u32 remain = len-pos;
  	u32 todo = std::min<u32>(remain,(u32)bytes);
  	if(len==0)
  	{
  		failbit = true;
  		return 0;
  	}
  	if(todo<=4)
  	{
  		u8* src = buf()+pos;
  		u8* dst = (u8*)ptr;
  		for(size_t i=0;i<todo;i++)
  			*dst++ = *src++;
  	}
  	else
  	{
  		memcpy((void*)ptr,buf()+pos,todo);
  	}
  	pos += todo;
  	if(todo<bytes)
  		failbit = true;
  	return todo;
  }
  
  void EMUFILE_FILE::open(const char* fname, const char* mode)
  {
  	fp = fopen(fname,mode);
  	if(!fp)
  	{
  #ifdef _MSC_VER
  		std::wstring wfname = mbstowcs((std::string)fname);
  		std::wstring wfmode = mbstowcs((std::string)mode);
  		fp = _wfopen(wfname.c_str(),wfmode.c_str());
  #endif
  		if(!fp)
  			failbit = true;
  	}
  	this->fname = fname;
  	strcpy(this->mode,mode);
  }
  
  
  void EMUFILE_FILE::truncate(s32 length)
  {
  	::fflush(fp);
  	#ifdef _MSC_VER
  		_chsize(_fileno(fp),length);
  	#else
  		ftruncate(fileno(fp),length);
  	#endif
  	fclose(fp);
  	fp = NULL;
  	open(fname.c_str(),mode);
  }
  
  
  EMUFILE* EMUFILE_FILE::memwrap()
  {
  	EMUFILE_MEMORY* mem = new EMUFILE_MEMORY(size());
  	if(size()==0) return mem;
  	fread(mem->buf(),size());
  	return mem;
  }
  
  EMUFILE* EMUFILE_MEMORY::memwrap()
  {
  	return this;
  }
  
  void EMUFILE::write64le(u64* val)
  {
  	write64le(*val);
  }
  
  void EMUFILE::write64le(u64 val)
  {
  #ifdef LOCAL_BE
  	u8 s[8];
  	s[0]=(u8)b;
  	s[1]=(u8)(b>>8);
  	s[2]=(u8)(b>>16);
  	s[3]=(u8)(b>>24);
  	s[4]=(u8)(b>>32);
  	s[5]=(u8)(b>>40);
  	s[6]=(u8)(b>>48);
  	s[7]=(u8)(b>>56);
  	fwrite((char*)&s,8);
  	return 8;
  #else
  	fwrite(&val,8);
  #endif
  }
  
  
  size_t EMUFILE::read64le(u64 *Bufo)
  {
  	u64 buf;
  	if(fread((char*)&buf,8) != 8)
  		return 0;
  #ifndef LOCAL_BE
  	*Bufo=buf;
  #else
  	*Bufo = LE_TO_LOCAL_64(buf);
  #endif
  	return 1;
  }
  
  u64 EMUFILE::read64le()
  {
  	u64 temp;
  	read64le(&temp);
  	return temp;
  }
  
  void EMUFILE::write32le(u32* val)
  {
  	write32le(*val);
  }
  
  void EMUFILE::write32le(u32 val)
  {
  #ifdef LOCAL_BE
  	u8 s[4];
  	s[0]=(u8)val;
  	s[1]=(u8)(val>>8);
  	s[2]=(u8)(val>>16);
  	s[3]=(u8)(val>>24);
  	fwrite(s,4);
  #else
  	fwrite(&val,4);
  #endif
  }
  
  size_t EMUFILE::read32le(s32* Bufo) { return read32le((u32*)Bufo); }
  
  size_t EMUFILE::read32le(u32* Bufo)
  {
  	u32 buf;
  	if(fread(&buf,4)<4)
  		return 0;
  #ifndef LOCAL_BE
  	*(u32*)Bufo=buf;
  #else
  	*(u32*)Bufo=((buf&0xFF)<<24)|((buf&0xFF00)<<8)|((buf&0xFF0000)>>8)|((buf&0xFF000000)>>24);
  #endif
  	return 1;
  }
  
  u32 EMUFILE::read32le()
  {
  	u32 ret;
  	read32le(&ret);
  	return ret;
  }
  
  void EMUFILE::write16le(u16* val)
  {
  	write16le(*val);
  }
  
  void EMUFILE::write16le(u16 val)
  {
  #ifdef LOCAL_BE
  	u8 s[2];
  	s[0]=(u8)val;
  	s[1]=(u8)(val>>8);
  	fwrite(s,2);
  #else
  	fwrite(&val,2);
  #endif
  }
  
  size_t EMUFILE::read16le(s16* Bufo) { return read16le((u16*)Bufo); }
  
  size_t EMUFILE::read16le(u16* Bufo)
  {
  	u32 buf;
  	if(fread(&buf,2)<2)
  		return 0;
  #ifndef LOCAL_BE
  	*(u16*)Bufo=buf;
  #else
  	*Bufo = LE_TO_LOCAL_16(buf);
  #endif
  	return 1;
  }
  
  u16 EMUFILE::read16le()
  {
  	u16 ret;
  	read16le(&ret);
  	return ret;
  }
  
  void EMUFILE::write8le(u8* val)
  {
  	write8le(*val);
  }
  
  
  void EMUFILE::write8le(u8 val)
  {
  	fwrite(&val,1);
  }
  
  size_t EMUFILE::read8le(u8* val)
  {
  	return fread(val,1);
  }
  
  u8 EMUFILE::read8le()
  {
  	u8 temp;
  	fread(&temp,1);
  	return temp;
  }
  
  void EMUFILE::writedouble(double* val)
  {
  	write64le(double_to_u64(*val));
  }
  void EMUFILE::writedouble(double val)
  {
  	write64le(double_to_u64(val));
  }
  
  double EMUFILE::readdouble()
  {
  	double temp;
  	readdouble(&temp);
  	return temp;
  }
  
  size_t EMUFILE::readdouble(double* val)
  {
  	u64 temp;
  	size_t ret = read64le(&temp);
  	*val = u64_to_double(temp);
  	return ret;
  }
  