V1/man/man3/putc.3

        11/3/71                         PUTC, PUTW, FCREAT, FLUSH (III)


NAME              putc, putw, fcreat, flush -- buffered output

SYNOPSIS          may      $filename , r0
                  jsr      r5,fcreat; iobuf

                  (get byte in r0)
                  jsr r5,putc; iobuf

                  (get word in r0)
                  jsr r5,putw; iobuf

                  jsr r5,flush; iobuf

DESCRIPTION       fcreat creates the given file (mode 17) and sets up the buffer
                  iohuf (size 134(10) 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 format
                  of the buffer is:

                  iobuf:   .=.+2               /   file descriptor
                            .=.+2              /   characters unused in buffer
                            .=.+ 2             /   ptr to next free character
                            .=.+128.           /   buffer

                  fcreat sets the error bit (c--bit) if the file creation failed;
                  none of the other routines return error information.

                  Before terminating, a program should call flush to force out
                  the last of the output.

                  The user must supply iohuf, which should begin on a word
                  boundary.

FILES             kept in/etc/liba.a

SEE ALSO          sys creat; sys write; getc, getw, fopen

DIAGNOSTICS       error bit possible on fcreat call

BUGS              buffers should be changed to 512 bytes.

OWNER             dmr