Bug Summary

File:fe-text/mainwindows-layout.c
Location:line 155, column 15
Description:Division by zero/undefined value.

Annotated Source Code

1/*
2 mainwindows-layout.c : irssi
3
4 Copyright (C) 2001 Timo Sirainen
5
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.
10
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.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19*/
20
21#include "module.h"
22#include "signals.h"
23#include "misc.h"
24#include "lib-config/iconfig.h"
25#include "settings.h"
26
27#include "mainwindows.h"
28#include "gui-windows.h"
29#include "textbuffer-view.h"
30
31static void sig_layout_window_save(WINDOW_REC *window, CONFIG_NODE *node)
32{
33 WINDOW_REC *active;
34 GUI_WINDOW_REC *gui;
35
36 gui = WINDOW_GUI(window)((GUI_WINDOW_REC *) ((window)->gui_data));
37 if (gui->sticky) {
38 iconfig_node_set_bool(node, "sticky", TRUE)config_node_set_bool(mainconfig, node, "sticky", (!(0)));
39 active = gui->parent->active;
40 if (window != active)
41 iconfig_node_set_int(node, "parent", active->refnum)config_node_set_int(mainconfig, node, "parent", active->refnum
);
42 }
43
44 if (gui->use_scroll)
45 iconfig_node_set_bool(node, "scroll", gui->scroll)config_node_set_bool(mainconfig, node, "scroll", gui->scroll
);
46}
47
48static void sig_layout_window_restore(WINDOW_REC *window, CONFIG_NODE *node)
49{
50 WINDOW_REC *parent;
51 GUI_WINDOW_REC *gui;
52
53 gui = WINDOW_GUI(window)((GUI_WINDOW_REC *) ((window)->gui_data));
54
55 parent = window_find_refnum(config_node_get_int(node, "parent", -1));
56 if (parent != NULL((void *)0))
57 gui_window_reparent(window, WINDOW_MAIN(parent)(((GUI_WINDOW_REC *) ((parent)->gui_data))->parent));
58
59 if (config_node_get_bool(node, "sticky", FALSE(0)))
60 gui_window_set_sticky(window);
61 if (config_node_get_str(node, "scroll", NULL((void *)0)) != NULL((void *)0)) {
62 gui->use_scroll = TRUE(!(0));
63 gui->scroll = config_node_get_bool(node, "scroll", TRUE(!(0)));
64 textbuffer_view_set_scroll(gui->view, gui->scroll);
65 }
66}
67
68static void main_window_save(MAIN_WINDOW_REC *window, CONFIG_NODE *node)
69{
70 char num[MAX_INT_STRLEN((sizeof(int) * 8 + 2) / 3 + 1)];
71
72 ltoa(num, window->active->refnum)g_snprintf(num, sizeof(num), "%d", window->active->refnum
);
73 node = config_node_section(node, num, NODE_TYPE_BLOCK);
74
75 iconfig_node_set_int(node, "first_line", window->first_line)config_node_set_int(mainconfig, node, "first_line", window->
first_line);
76 iconfig_node_set_int(node, "lines", window->height)config_node_set_int(mainconfig, node, "lines", window->height
);
77}
78
79static void sig_layout_save(void)
80{
81 CONFIG_NODE *node;
82
83 iconfig_set_str(NULL, "mainwindows", NULL)config_set_str(mainconfig, ((void *)0), "mainwindows", ((void
*)0));
84 node = iconfig_node_traverse("mainwindows", TRUE)config_node_traverse(mainconfig, "mainwindows", (!(0)));
85
86 g_slist_foreach(mainwindows, (GFunc) main_window_save, node);
87}
88
89static int window_node_cmp(CONFIG_NODE *n1, CONFIG_NODE *n2)
90{
91 return config_node_get_int(n1, "first_line", 0) >
92 config_node_get_int(n2, "first_line", 0) ? -1 : 1;
93}
94
95/* Returns list of mainwindow nodes sorted by first_line
96 (lowest in screen first) */
97static GSList *get_sorted_windows_config(CONFIG_NODE *node)
98{
99 GSList *tmp, *output;
100
101 output = NULL((void *)0);
102 tmp = config_node_first(node->value);
103 for (; tmp != NULL((void *)0); tmp = config_node_next(tmp)) {
104 output = g_slist_insert_sorted(output, tmp->data,
105 (GCompareFunc) window_node_cmp);
106 }
107
108 return output;
109}
110
111static void sig_layout_restore(void)
112{
113 MAIN_WINDOW_REC *lower_window;
114 WINDOW_REC *window;
115 CONFIG_NODE *node;
116 GSList *tmp, *sorted_config;
117 int avail_height, height, *heights;
118 int i, lower_size, windows_count, diff;
119
120 node = iconfig_node_traverse("mainwindows", FALSE)config_node_traverse(mainconfig, "mainwindows", (0));
121 if (node == NULL((void *)0)) return;
[1] Taking false branch
122
123 sorted_config = get_sorted_windows_config(node);
124 windows_count = g_slist_length(sorted_config);
125
126 /* calculate the saved terminal height */
127 avail_height = term_height -
128 screen_reserved_top - screen_reserved_bottom;
129 height = 0;
130 heights = g_new0(int, windows_count)((int *) g_malloc0 (((gsize) sizeof (int)) * ((gsize) (windows_count
))));
131 for (i = 0, tmp = sorted_config; tmp != NULL((void *)0); tmp = tmp->next, i++) {
[2] Loop condition is false. Execution continues on line 138
132 CONFIG_NODE *node = tmp->data;
133
134 heights[i] = config_node_get_int(node, "lines", 0);
135 height += heights[i];
136 }
137
138 if (avail_height <= (WINDOW_MIN_SIZE2*2)+1) {
[3] Taking false branch
139 /* we can fit only one window to screen -
140 give it all the height we can */
141 windows_count = 1;
142 heights[0] = avail_height;
143 } else if (height != avail_height) {
[4] Taking true branch
144 /* Terminal's height is different from the saved one.
145 Resize the windows so they fit to screen. */
146 while (height > avail_height &&
[5] Loop condition is false. Execution continues on line 154
147 windows_count*(WINDOW_MIN_SIZE2+1) > avail_height) {
148 /* all windows can't fit into screen,
149 remove the lowest ones */
150 windows_count--;
151 }
152
153 /* try to keep the windows' size about the same in percents */
154 for (i = 0; i < windows_count; i++) {
[6] Loop condition is true. Entering loop body
155 int size = avail_height*heights[i]/height;
[7] Division by zero/undefined value
156 if (size < WINDOW_MIN_SIZE2+1)
157 size = WINDOW_MIN_SIZE2+1;
158 heights[i] = size;
159 }
160
161 /* give/remove the last bits */
162 height = 0;
163 for (i = 0; i < windows_count; i++)
164 height += heights[i];
165
166 diff = height < avail_height ? 1 : -1;
167 for (i = 0; height != avail_height; i++) {
168 if (i == windows_count)
169 i = 0;
170
171 if (heights[i] > WINDOW_MIN_SIZE2+1) {
172 height += diff;
173 heights[i] += diff;
174 }
175 }
176 }
177
178 /* create all the visible windows with correct size */
179 lower_window = NULL((void *)0); lower_size = 0;
180 for (i = 0, tmp = sorted_config; i < windows_count; tmp = tmp->next, i++) {
181 CONFIG_NODE *node = tmp->data;
182
183 /* create a new window + mainwindow */
184 signal_emit("gui window create override", 1,
185 GINT_TO_POINTER(0)((gpointer) (0)));
186
187 window = window_create(NULL((void *)0), TRUE(!(0)));
188 window_set_refnum(window, atoi(node->key));
189
190 if (lower_size > 0)
191 mainwindow_set_size(lower_window, lower_size, FALSE(0));
192
193 window_set_active(window);
194 active_mainwin = WINDOW_MAIN(window)(((GUI_WINDOW_REC *) ((window)->gui_data))->parent);
195
196 lower_window = WINDOW_MAIN(window)(((GUI_WINDOW_REC *) ((window)->gui_data))->parent);
197 lower_size = heights[i];
198 if (lower_size < WINDOW_MIN_SIZE2+1)
199 lower_size = WINDOW_MIN_SIZE2+1;
200 }
201 g_slist_free(sorted_config);
202 g_free(heights);
203
204 if (lower_size > 0)
205 mainwindow_set_size(lower_window, lower_size, FALSE(0));
206}
207
208static void sig_layout_reset(void)
209{
210 iconfig_set_str(NULL, "mainwindows", NULL)config_set_str(mainconfig, ((void *)0), "mainwindows", ((void
*)0));
211}
212
213void mainwindows_layout_init(void)
214{
215 signal_add("layout save window", (SIGNAL_FUNC) sig_layout_window_save)signal_add_full("fe-text", 0, ("layout save window"), (SIGNAL_FUNC
) ((SIGNAL_FUNC) sig_layout_window_save), ((void *)0));
216 signal_add("layout restore window", (SIGNAL_FUNC) sig_layout_window_restore)signal_add_full("fe-text", 0, ("layout restore window"), (SIGNAL_FUNC
) ((SIGNAL_FUNC) sig_layout_window_restore), ((void *)0));
217 signal_add("layout save", (SIGNAL_FUNC) sig_layout_save)signal_add_full("fe-text", 0, ("layout save"), (SIGNAL_FUNC) (
(SIGNAL_FUNC) sig_layout_save), ((void *)0));
218 signal_add_first("layout restore", (SIGNAL_FUNC) sig_layout_restore)signal_add_full("fe-text", -100, ("layout restore"), (SIGNAL_FUNC
) ((SIGNAL_FUNC) sig_layout_restore), ((void *)0));
219 signal_add("layout reset", (SIGNAL_FUNC) sig_layout_reset)signal_add_full("fe-text", 0, ("layout reset"), (SIGNAL_FUNC)
((SIGNAL_FUNC) sig_layout_reset), ((void *)0));
220}
221
222void mainwindows_layout_deinit(void)
223{
224 signal_remove("layout save window", (SIGNAL_FUNC) sig_layout_window_save)signal_remove_full(("layout save window"), (SIGNAL_FUNC) ((SIGNAL_FUNC
) sig_layout_window_save), ((void *)0));
225 signal_remove("layout restore window", (SIGNAL_FUNC) sig_layout_window_restore)signal_remove_full(("layout restore window"), (SIGNAL_FUNC) (
(SIGNAL_FUNC) sig_layout_window_restore), ((void *)0));
226 signal_remove("layout save", (SIGNAL_FUNC) sig_layout_save)signal_remove_full(("layout save"), (SIGNAL_FUNC) ((SIGNAL_FUNC
) sig_layout_save), ((void *)0));
227 signal_remove("layout restore", (SIGNAL_FUNC) sig_layout_restore)signal_remove_full(("layout restore"), (SIGNAL_FUNC) ((SIGNAL_FUNC
) sig_layout_restore), ((void *)0));
228 signal_remove("layout reset", (SIGNAL_FUNC) sig_layout_reset)signal_remove_full(("layout reset"), (SIGNAL_FUNC) ((SIGNAL_FUNC
) sig_layout_reset), ((void *)0));
229}