4 Copyright (C) 1999-2000 Timo Sirainen
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Maximum line length - split to two lines if it's longer than this.
26 This is mostly to prevent excessive memory usage. Like if someone DCC
27 chats you, you both have very fast connections and the other side sends
28 you 100 megs of text without any line feeds -> irssi will (try to)
29 allocate 128M of memory for the line and will eventually crash when it
30 can't allocate any more memory. If the line is split at every 64k the
31 text buffer will free the old lines and the memory usage never gets
33 #define MAX_CHARS_IN_LINE 65536
42 static void linebuf_append(LINEBUF_REC *rec, const char *data, int len)
44 if (rec->len+len > rec->alloc) {
45 rec->alloc = nearest_power(rec->len+len);;
46 rec->str = rec->str == NULL ? g_malloc(rec->alloc) :
47 g_realloc(rec->str, rec->alloc);
50 memcpy(rec->str + rec->len, data, len);
54 static char *linebuf_find(LINEBUF_REC *rec, char chr)
58 for (n = 0; n < rec->len; n++)
59 if (rec->str[n] == chr) return rec->str+n;
64 static int remove_newline(LINEBUF_REC *rec)
68 ptr = linebuf_find(rec, '\n');
70 /* LF wasn't found, wait for more data.. */
71 if (rec->len < MAX_CHARS_IN_LINE)
74 /* line buffer is too big - force a newline. */
75 linebuf_append(rec, "\n", 1);
76 ptr = rec->str+rec->len-1;
79 rec->remove = (int) (ptr-rec->str)+1;
80 if (ptr != rec->str && ptr[-1] == '\r') {
89 /* line-split `data'. Initially `*buffer' should contain NULL. */
90 int line_split(const char *data, int len, char **output, LINEBUF_REC **buffer)
94 g_return_val_if_fail(data != NULL, -1);
95 g_return_val_if_fail(output != NULL, -1);
96 g_return_val_if_fail(buffer != NULL, -1);
99 *buffer = g_new0(LINEBUF_REC, 1);
102 if (rec->remove > 0) {
103 rec->len -= rec->remove;
104 g_memmove(rec->str, rec->str+rec->remove, rec->len);
109 linebuf_append(rec, data, len);
111 /* connection closed.. */
115 /* no new data got but still something in buffer.. */
117 if (linebuf_find(rec, '\n') == NULL) {
118 /* connection closed and last line is missing \n ..
119 just add it so we can see if it had
121 linebuf_append(rec, "\n", 1);
126 return remove_newline(rec);
129 void line_split_free(LINEBUF_REC *buffer)
131 if (buffer != NULL) {
132 if (buffer->str != NULL) g_free(buffer->str);
137 /* Return 1 if there is no data in the buffer */
138 int line_split_is_empty(LINEBUF_REC *buffer)
140 return buffer->len == 0;