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
10 ;;;; $Id: buff-input.lisp,v 1.3 2002/10/10 16:23:48 kevin Exp $
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 (declaim (optimize (speed 3) (safety 0) (space 0) (debug 0)))
23 (defconstant +max-field+ 10000)
24 (defconstant +max-fields-per-line+ 20)
25 (defconstant +field-delim+ #\|)
26 (defconstant +eof-char+ #\rubout)
27 (defconstant +newline+ #\Newline)
29 (declaim (type character +eof-char+ +field-delim+ +newline+)
30 (type fixnum +max-field+ +max-fields-per-line+))
32 ;; Buffered fields parsing function
33 ;; Uses fill-pointer for size
35 (defun make-fields-buffer (&optional (max-fields +max-fields-per-line+)
36 (max-field-len +max-field+))
37 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer 0 :adjustable nil)))
38 (dotimes (i +max-fields-per-line+)
39 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer 0 :adjustable nil)))
42 (defun read-buffered-fields (fields strm &optional (field-delim +field-delim+))
43 "Read a line from a stream into a field buffers"
44 (declare (type base-char field-delim)
46 (setf (fill-pointer fields) 0)
47 (do ((ifield 0 (1+ ifield))
50 (linedone (if eof 'eof fields))
51 (declare (type fixnum ifield)
52 (type boolean linedone eof))
53 (let ((field (aref fields ifield)))
54 (declare (type base-string field))
57 (rc (read-char strm nil +eof-char+)
58 (read-char strm nil +eof-char+)))
59 (fielddone (unread-char rc strm))
60 (declare (type fixnum ipos)
62 (type boolean fielddone))
64 ((char= rc field-delim)
65 (setf (fill-pointer field) ipos)
68 (setf (fill-pointer field) ipos)
69 (setf (fill-pointer fields) ifield)
72 ((char= rc +eof-char+)
73 (setf (fill-pointer field) ipos)
74 (setf (fill-pointer fields) ifield)
79 (setf (char field ipos) rc)
82 ;; Buffered fields parsing
83 ;; Does not use fill-pointer
84 ;; Returns 2 values -- string array and length array
85 (defstruct field-buffers
86 (nfields 0 :type fixnum)
90 (defmethod print-object ((f field-buffers) s)
91 (format s "#<~d>~%" (field-buffers-nfields f)))
93 (defun make-fields-buffer2 (&optional (max-fields +max-fields-per-line+)
94 (max-field-len +max-field+))
95 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer nil :adjustable nil))
96 (bufstruct (make-field-buffers)))
97 (dotimes (i +max-fields-per-line+)
98 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer nil :adjustable nil)))
99 (setf (field-buffers-buffers bufstruct) bufs)
100 (setf (field-buffers-field-lengths bufstruct) (make-array +max-fields-per-line+
101 :element-type 'fixnum :fill-pointer nil :adjustable nil))
102 (setf (field-buffers-nfields bufstruct) 0)
106 (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 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)
157 "Read a line from astream into a vector buffer"
160 (declare (fixnum pos) (t done))
161 (setf (fill-pointer linebuffer) 0)
162 (do ((c (read-char strm nil +eof-char+)
163 (read-char strm nil +eof-char+)))
165 (unless (eql c +eof-char+) (unread-char c strm))
166 (if (eql c +eof-char+) 'eof linebuffer)))
167 (declare (character c))
171 (setf (fill-pointer linebuffer) (1- pos)))
176 (setf (char linebuffer pos) c)