fat.c , signed int and EOF

[Milhaus]

Hi,
could you explain me why functions like fatgetc in FAT.c driver implementation of CCS compiler return signed int ( int8 ) instead signed int ( int16 ) like ANY other standart ANSI compilers ? It is impossible to detect from these functions end of file, because 8bit value cannot contain 8bit binary value and EOF.Detecting EOF from the stream->Flags value is not too much compatible with other C compilers.Why you dont use the standart functions ? It is due any code optimalization ?


Milos

signed int fatgetc(FILE* stream)
{
char ch; // character read in

// check to see if the stream has proper permissions to read
if(stream->Flags & Read)
{
// when the number of bytes until eof hit zero, we know we are at the end of any file
if(stream->Bytes_Until_EOF == 0)
{
stream->Flags |= EOF_Reached;
return EOF;
}

[ckielstra]