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 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
12 ;;;; KMRCL users are granted the rights to distribute and use this software
13 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
14 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
15 ;;;; *************************************************************************
19 (eval-when (:compile-toplevel)
20 (declaim (optimize (speed 3) (safety 0) (space 0) (debug 0))))
22 (defconstant +max-field+ 10000)
23 (defconstant +max-fields-per-line+ 20)
24 (defconstant +field-delim+ #\|)
25 (defconstant +eof-char+ #\rubout)
26 (defconstant +newline+ #\Newline)
28 (declaim (type character +eof-char+ +field-delim+ +newline+)
29 (type fixnum +max-field+ +max-fields-per-line+))
31 ;; Buffered fields parsing function
32 ;; Uses fill-pointer for size
34 (defun make-fields-buffer (&optional (max-fields +max-fields-per-line+)
35 (max-field-len +max-field+))
36 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer 0 :adjustable nil)))
37 (dotimes (i +max-fields-per-line+)
38 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer 0 :adjustable nil)))
41 (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 is-eof eof fields))
51 (declare (type fixnum ifield)
52 (type boolean linedone is-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 (defun make-fields-buffer2 (&optional (max-fields +max-fields-per-line+)
91 (max-field-len +max-field+))
92 (let ((bufs (make-array max-fields :element-type 'vector :fill-pointer nil :adjustable nil))
93 (bufstruct (make-field-buffers)))
94 (dotimes (i +max-fields-per-line+)
95 (setf (aref bufs i) (make-array max-field-len :element-type 'character :fill-pointer nil :adjustable nil)))
96 (setf (field-buffers-buffers bufstruct) bufs)
97 (setf (field-buffers-field-lengths bufstruct) (make-array +max-fields-per-line+
98 :element-type 'fixnum :fill-pointer nil :adjustable nil))
99 (setf (field-buffers-nfields bufstruct) 0)
103 (defun read-buffered-fields2 (fields strm &optional (field-delim +field-delim+)
105 "Read a line from a stream into a field buffers"
106 (declare (character field-delim))
107 (setf (field-buffers-nfields fields) 0)
108 (do ((ifield 0 (1+ ifield))
111 (linedone (if is-eof eof fields))
112 (declare (fixnum ifield)
114 (let ((field (aref (field-buffers-buffers fields) ifield)))
115 (declare (simple-string field))
118 (rc (read-char strm nil +eof-char+)
119 (read-char strm nil +eof-char+)))
120 (fielddone (unread-char rc strm))
121 (declare (fixnum ipos)
125 ((char= rc field-delim)
126 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
128 ((char= rc +newline+)
129 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
130 (setf (field-buffers-nfields fields) ifield)
133 ((char= rc +eof-char+)
134 (setf (aref (field-buffers-field-lengths fields) ifield) ipos)
135 (setf (field-buffers-nfields fields) ifield)
140 (setf (char field ipos) rc)
143 (defun bfield (fields i)
144 (if (>= i (field-buffers-nfields fields))
146 (subseq (aref (field-buffers-buffers fields) i) 0 (aref (field-buffers-field-lengths fields) i))))
148 ;;; Buffered line parsing function
150 (defconstant +max-line+ 20000)
151 (let ((linebuffer (make-array +max-line+
152 :element-type 'character
154 (defun read-buffered-line (strm eof)
155 "Read a line from astream into a vector buffer"
156 (declare (optimize (speed 3) (space 0) (safety 0)))
159 (declare (fixnum pos) (type boolean done))
160 (setf (fill-pointer linebuffer) 0)
161 (do ((c (read-char strm nil +eof-char+)
162 (read-char strm nil +eof-char+)))
164 (unless (eql c +eof-char+) (unread-char c strm))
165 (if (eql c +eof-char+) eof linebuffer)))
166 (declare (character c))
169 (warn "Line overflow")
173 (setf (fill-pointer linebuffer) (1- pos)))
178 (setf (char linebuffer pos) c)