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 #include "linebuffer.h"
27 /* Initialize linebuffer LINEBUFFER for use. */
30 initbuffer (linebuffer)
31 struct linebuffer *linebuffer;
33 linebuffer->length = 0;
34 linebuffer->size = 200;
35 linebuffer->buffer = (char *) xmalloc (linebuffer->size);
38 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
39 Remove any newline. Does not null terminate.
40 Return LINEBUFFER, except at end of file return 0. */
43 readline (linebuffer, stream)
44 struct linebuffer *linebuffer;
48 char *buffer = linebuffer->buffer;
49 char *p = linebuffer->buffer;
50 char *end = buffer + linebuffer->size; /* Sentinel. */
54 linebuffer->length = 0;
63 linebuffer->size *= 2;
64 buffer = (char *) xrealloc (buffer, linebuffer->size);
65 p += buffer - linebuffer->buffer;
66 linebuffer->buffer = buffer;
67 end = buffer + linebuffer->size;
69 if (c == EOF || c == '\n')
74 if (feof (stream) && p == buffer)
76 linebuffer->length = 0;
79 linebuffer->length = p - linebuffer->buffer;
83 /* Free linebuffer LINEBUFFER and its data, all allocated with malloc. */
86 freebuffer (linebuffer)
87 struct linebuffer *linebuffer;
89 free (linebuffer->buffer);