1 /* linebuffer.c -- read arbitrarily long lines
2 Copyright (C) 1986, 1991 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* Written by Richard Stallman. */
21 #if defined (CONFIG_BROKETS)
22 /* We use <config.h> instead of "config.h" so that a compilation
23 using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
24 (which it would do because it found this file in $srcdir). */
32 #include "linebuffer.h"
38 /* Initialize linebuffer LINEBUFFER for use. */
41 initbuffer (linebuffer)
42 struct linebuffer *linebuffer;
44 linebuffer->length = 0;
45 linebuffer->size = 200;
46 linebuffer->buffer = (char *) xmalloc (linebuffer->size);
49 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
50 Remove any newline. Does not null terminate.
51 Return LINEBUFFER, except at end of file return 0. */
54 readline (linebuffer, stream)
55 struct linebuffer *linebuffer;
59 char *buffer = linebuffer->buffer;
60 char *p = linebuffer->buffer;
61 char *end = buffer + linebuffer->size; /* Sentinel. */
65 linebuffer->length = 0;
74 linebuffer->size *= 2;
75 buffer = (char *) xrealloc (buffer, linebuffer->size);
76 p += buffer - linebuffer->buffer;
77 linebuffer->buffer = buffer;
78 end = buffer + linebuffer->size;
80 if (c == EOF || c == '\n')
85 if (feof (stream) && p == buffer)
87 linebuffer->length = 0;
90 linebuffer->length = p - linebuffer->buffer;
94 /* Free linebuffer LINEBUFFER and its data, all allocated with malloc. */
97 freebuffer (linebuffer)
98 struct linebuffer *linebuffer;
100 free (linebuffer->buffer);