심심하니 fread, fwrite, fseek, ftell 구현. (Windows)

 

# fread

size_t __cdecl fread( void *buffer, size_t size, size_t count, FILE *stream){  unsigned long ul_rs = 0; //unsigned long return size  ReadFile( (HANDLE)_get_osfhandle(stream->_file),      buffer,      count*size,      &ul_rs,      NULL) );   return (size_t)ul_rs;  }

 

# fwrite

size_t __cdecl fwrite( void *buffer, size_t size, size_t count, FILE *stream){  unsigned long ul_rs = 0; //unsigned long return size  WriteFile( (HANDLE)_get_osfhandle(stream->_file),     buffer,     count*size,     &ul_rs,     NULL) );  return (size_t)ul_rs;  }

 

# fseek

#define SEEK_SET FILE_BEGIN  #define SEEK_CUR FILE_CURRENT  #define SEEK_END FILE_END    int __cdecl fseek( FILE *stream, long offset, int origin ){   return (SetFilePointer(_get_osfhandle(stream->_file),offset,origin))0:(int)GetLastError();  }

 

# ftell

int __cdecl ftell(FILE *stream){   return (int) SetFilePointer(_get_osfhandle(stream->_file),0,FILE_CURRENT);  }