PUTC(III) 6/12/72 PUTC(III) NAME putc, putw, fcreat, fflush - buffered output SYNOPSIS mov $filename,r0 jsr r5,fcreat; iobuf fcreat(file, iobuf) char *file; struct buf *iobuf; (get byte in r0) jsr r5,putc; iobuf putc(c, iobuf) int c; struct buf *iobuf; (get word in r0) jsr r5,putw; iobuf putw(w, iobuf); int w; struct buf *iobuf; jsr r5,flush; iobuf fflush(iobuf) struct buf *iobuf; DESCRIPTION Fcreat creates the given file (mode 666) and sets up the buffer iobuf (size 518 bytes); putc and putw write a byte or word respectively onto the file; flush forces the contents of the buffer to be written, but does not close the file. The structure of the buffer is: struct buf { int fildes; /* File descriptor */ int nunused; /* Remaining slots */ char *xfree; /* Ptr to next free slot */ char buff[512]; /* The buffer */ }; Before terminating, a program should call flush to force out the last of the output (fflush from C). The user must supply iobuf, which should begin on a word boundary. To write a new file using the same buffer, it suffices to call [f]flush, close the file, and call fcreat again. - 1 - PUTC(III) 6/12/72 PUTC(III) SEE ALSO creat(II), write(II), getc(III) DIAGNOSTICS Fcreat sets the error bit (c-bit) if the file creation failed (from C, returns -1). Putc and putw return their character (word) argument. In all calls errno is set appro- priately to 0 or to a system error number. See introduction (II). BUGS - 2 -