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bufmac.cl
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bufmac.cl
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;;; -*- Mode: LISP; Syntax: Common-lisp; Package: XLIB; Base: 10; Lowercase: Yes -*-
;;; This file contains macro definitions for the BUFFER object for Common-Lisp
;;; X windows version 11
;;;
;;; TEXAS INSTRUMENTS INCORPORATED
;;; P.O. BOX 2909
;;; AUSTIN, TEXAS 78769
;;;
;;; Copyright (C) 1987 Texas Instruments Incorporated.
;;;
;;; Permission is granted to any individual or institution to use, copy, modify,
;;; and distribute this software, provided that this complete copyright and
;;; permission notice is maintained, intact, in all copies and supporting
;;; documentation.
;;;
;;; Texas Instruments Incorporated provides this software "as is" without
;;; express or implied warranty.
;;;
(in-package :xlib)
;;; The read- macros are in buffer.lisp, because event-case depends on (most of) them.
(defmacro write-card8 (byte-index item)
`(aset-card8 (the card8 ,item) buffer-bbuf (index+ buffer-boffset ,byte-index)))
(defmacro write-int8 (byte-index item)
`(aset-int8 (the int8 ,item) buffer-bbuf (index+ buffer-boffset ,byte-index)))
(defmacro write-card16 (byte-index item)
#+clx-overlapping-arrays
`(aset-card16 (the card16 ,item) buffer-wbuf
(index+ buffer-woffset (index-ash ,byte-index -1)))
#-clx-overlapping-arrays
`(aset-card16 (the card16 ,item) buffer-bbuf
(index+ buffer-boffset ,byte-index)))
(defmacro write-int16 (byte-index item)
#+clx-overlapping-arrays
`(aset-int16 (the int16 ,item) buffer-wbuf
(index+ buffer-woffset (index-ash ,byte-index -1)))
#-clx-overlapping-arrays
`(aset-int16 (the int16 ,item) buffer-bbuf
(index+ buffer-boffset ,byte-index)))
(defmacro write-card32 (byte-index item)
#+clx-overlapping-arrays
`(aset-card32 (the card32 ,item) buffer-lbuf
(index+ buffer-loffset (index-ash ,byte-index -2)))
#-clx-overlapping-arrays
`(aset-card32 (the card32 ,item) buffer-bbuf
(index+ buffer-boffset ,byte-index)))
(defmacro write-int32 (byte-index item)
#+clx-overlapping-arrays
`(aset-int32 (the int32 ,item) buffer-lbuf
(index+ buffer-loffset (index-ash ,byte-index -2)))
#-clx-overlapping-arrays
`(aset-int32 (the int32 ,item) buffer-bbuf
(index+ buffer-boffset ,byte-index)))
(defmacro write-card29 (byte-index item)
#+clx-overlapping-arrays
`(aset-card29 (the card29 ,item) buffer-lbuf
(index+ buffer-loffset (index-ash ,byte-index -2)))
#-clx-overlapping-arrays
`(aset-card29 (the card29 ,item) buffer-bbuf
(index+ buffer-boffset ,byte-index)))
;; This is used for 2-byte characters, which may not be aligned on 2-byte boundaries
;; and always are written high-order byte first.
(defmacro write-char2b (byte-index item)
;; It is impossible to do an overlapping write, so only nonoverlapping here.
`(let ((%item ,item)
(%byte-index (index+ buffer-boffset ,byte-index)))
(declare (type card16 %item)
(type array-index %byte-index))
(aset-card8 (the card8 (ldb (byte 8 8) %item)) buffer-bbuf %byte-index)
(aset-card8 (the card8 (ldb (byte 8 0) %item)) buffer-bbuf (index+ %byte-index 1))))
(defmacro set-buffer-offset (value &environment env)
env
`(let ((.boffset. ,value))
(declare (type array-index .boffset.))
(setq buffer-boffset .boffset.)
#+clx-overlapping-arrays
,@(when (member 16 (macroexpand '(%buffer-sizes) env))
`((setq buffer-woffset (index-ash .boffset. -1))))
#+clx-overlapping-arrays
,@(when (member 32 (macroexpand '(%buffer-sizes) env))
`((setq buffer-loffset (index-ash .boffset. -2))))
#+clx-overlapping-arrays
.boffset.))
(defmacro advance-buffer-offset (value)
`(set-buffer-offset (index+ buffer-boffset ,value)))
(defmacro with-buffer-output ((buffer &key (sizes '(8 16 32)) length index) &body body)
(unless (listp sizes) (setq sizes (list sizes)))
`(let ((%buffer ,buffer))
(declare (type display %buffer))
,(declare-bufmac)
,(when length
`(when (index>= (index+ (buffer-boffset %buffer) ,length) (buffer-size %buffer))
(buffer-flush %buffer)))
(let* ((buffer-boffset (the array-index ,(or index `(buffer-boffset %buffer))))
#-clx-overlapping-arrays
(buffer-bbuf (buffer-obuf8 %buffer))
#+clx-overlapping-arrays
,@(append
(when (member 8 sizes)
`((buffer-bbuf (buffer-obuf8 %buffer))))
(when (or (member 16 sizes) (member 160 sizes))
`((buffer-woffset (index-ash buffer-boffset -1))
(buffer-wbuf (buffer-obuf16 %buffer))))
(when (member 32 sizes)
`((buffer-loffset (index-ash buffer-boffset -2))
(buffer-lbuf (buffer-obuf32 %buffer))))))
(declare (type array-index buffer-boffset))
#-clx-overlapping-arrays
(declare (type buffer-bytes buffer-bbuf)
(array-register buffer-bbuf))
#+clx-overlapping-arrays
,@(append
(when (member 8 sizes)
'((declare (type buffer-bytes buffer-bbuf)
(array-register buffer-bbuf))))
(when (member 16 sizes)
'((declare (type array-index buffer-woffset))
(declare (type buffer-words buffer-wbuf)
(array-register buffer-wbuf))))
(when (member 32 sizes)
'((declare (type array-index buffer-loffset))
(declare (type buffer-longs buffer-lbuf)
(array-register buffer-lbuf)))))
buffer-boffset
#-clx-overlapping-arrays
buffer-bbuf
#+clx-overlapping-arrays
,@(append
(when (member 8 sizes) '(buffer-bbuf))
(when (member 16 sizes) '(buffer-woffset buffer-wbuf))
(when (member 32 sizes) '(buffer-loffset buffer-lbuf)))
#+clx-overlapping-arrays
(macrolet ((%buffer-sizes () ',sizes))
,@body)
#-clx-overlapping-arrays
,@body)))
;;; This macro is just used internally in buffer
(defmacro writing-buffer-chunks (type args decls &body body)
(when (> (length body) 2)
(error "writing-buffer-chunks called with too many forms"))
(let* ((size (* 8 (index-increment type)))
(form #-clx-overlapping-arrays
(first body)
#+clx-overlapping-arrays ; XXX type dependencies
(or (second body)
(first body))))
`(with-buffer-output (buffer :index boffset :sizes ,(reverse (adjoin size '(8))))
;; Loop filling the buffer
(do* (,@args
;; Number of bytes needed to output
(len ,(if (= size 8)
`(index- end start)
`(index-ash (index- end start) ,(truncate size 16)))
(index- len chunk))
;; Number of bytes available in buffer
(chunk (index-min len (index- (buffer-size buffer) buffer-boffset))
(index-min len (index- (buffer-size buffer) buffer-boffset))))
((not (index-plusp len)))
(declare ,@decls
(type array-index len chunk))
,form
(index-incf buffer-boffset chunk)
;; Flush the buffer
(when (and (index-plusp len) (index>= buffer-boffset (buffer-size buffer)))
(setf (buffer-boffset buffer) buffer-boffset)
(buffer-flush buffer)
(setq buffer-boffset (buffer-boffset buffer))
#+clx-overlapping-arrays
,(case size
(16 '(setq buffer-woffset (index-ash buffer-boffset -1)))
(32 '(setq buffer-loffset (index-ash buffer-boffset -2))))))
(setf (buffer-boffset buffer) (lround buffer-boffset)))))