1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: buff-input.lisp
6 ;;;; Purpose: Buffered line input
7 ;;;; Programmer: Kevin M. Rosenberg
8 ;;;; Date Started: Apr 2000
12 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
14 ;;;; KMRCL users are granted the rights to distribute and use this software
15 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
16 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
17 ;;;; *************************************************************************
21 (eval-when (:compile-toplevel)
22 (declaim (optimize (speed 3) (safety 0) (space 0) (debug 0))))
24 (defconstant +max-field+ 10000)
25 (defconstant +max-fields-per-line+ 20)
26 (defconstant +field-delim+ #\|)
27 (defconstant +eof-char+ #\rubout)
28 (defconstant +newline+ #\Newline)
30 (declaim (type character +eof-char+ +field-delim+ +newline+)
31 (type fixnum +max-field+ +max-fields-per-line+))
33 ;; Buffered fields parsing function
34 ;; Uses fill-pointer for size
36 (defun make-fields-buffer (&optional (max-fields +max-fields-per-line+)
37 (max-field-len +max-field+))
38 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer 0 :adjustable nil)))
39 (dotimes (i +max-fields-per-line+)
40 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer 0 :adjustable nil)))
43 (defun read-buffered-fields (fields strm &optional (field-delim +field-delim+)
45 "Read a line from a stream into a field buffers"
46 (declare (type base-char field-delim)
48 (setf (fill-pointer fields) 0)
49 (do ((ifield 0 (1+ ifield))
52 (linedone (if is-eof eof fields))
53 (declare (type fixnum ifield)
54 (type boolean linedone is-eof))
55 (let ((field (aref fields ifield)))
56 (declare (type base-string field))
59 (rc (read-char strm nil +eof-char+)
60 (read-char strm nil +eof-char+)))
61 (fielddone (unread-char rc strm))
62 (declare (type fixnum ipos)
64 (type boolean fielddone))
66 ((char= rc field-delim)
67 (setf (fill-pointer field) ipos)
70 (setf (fill-pointer field) ipos)
71 (setf (fill-pointer fields) ifield)
74 ((char= rc +eof-char+)
75 (setf (fill-pointer field) ipos)
76 (setf (fill-pointer fields) ifield)
81 (setf (char field ipos) rc)
84 ;; Buffered fields parsing
85 ;; Does not use fill-pointer
86 ;; Returns 2 values -- string array and length array
87 (defstruct field-buffers
88 (nfields 0 :type fixnum)
92 (defun make-fields-buffer2 (&optional (max-fields +max-fields-per-line+)
93 (max-field-len +max-field+))
94 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer nil :adjustable nil))
95 (bufstruct (make-field-buffers)))
96 (dotimes (i +max-fields-per-line+)
97 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer nil :adjustable nil)))
98 (setf (field-buffers-buffers bufstruct) bufs)
99 (setf (field-buffers-field-lengths bufstruct) (make-array +max-fields-per-line+
100 :element-type 'fixnum :fill-pointer nil :adjustable nil))
101 (setf (field-buffers-nfields bufstruct) 0)
105 (defun read-buffered-fields2 (fields strm &optional (field-delim +field-delim+)
107 "Read a line from a stream into a field buffers"
108 (declare (character field-delim))
109 (setf (field-buffers-nfields fields) 0)
110 (do ((ifield 0 (1+ ifield))
113 (linedone (if is-eof eof fields))
114 (declare (fixnum ifield)
116 (let ((field (aref (field-buffers-buffers fields) ifield)))
117 (declare (simple-string field))
120 (rc (read-char strm nil +eof-char+)
121 (read-char strm nil +eof-char+)))
122 (fielddone (unread-char rc strm))
123 (declare (fixnum ipos)
127 ((char= rc field-delim)
128 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
130 ((char= rc +newline+)
131 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
132 (setf (field-buffers-nfields fields) ifield)
135 ((char= rc +eof-char+)
136 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
137 (setf (field-buffers-nfields fields) ifield)
142 (setf (char field ipos) rc)
145 (defun bfield (fields i)
146 (if (>= i (field-buffers-nfields fields))
148 (subseq (aref (field-buffers-buffers fields) i) 0 (aref (field-buffers-field-lengths fields) i))))
150 ;;; Buffered line parsing function
152 (defconstant +max-line+ 20000)
153 (let ((linebuffer (make-array +max-line+
154 :element-type 'character
156 (defun read-buffered-line (strm eof)
157 "Read a line from astream into a vector buffer"
158 (declare (optimize (speed 3) (space 0) (safety 0)))
161 (declare (fixnum pos) (type boolean done))
162 (setf (fill-pointer linebuffer) 0)
163 (do ((c (read-char strm nil +eof-char+)
164 (read-char strm nil +eof-char+)))
166 (unless (eql c +eof-char+) (unread-char c strm))
167 (if (eql c +eof-char+) eof linebuffer)))
168 (declare (character c))
171 (warn "Line overflow")
175 (setf (fill-pointer linebuffer) (1- pos)))
180 (setf (char linebuffer pos) c)