mp3dec: Fix possible endless loop.

[paraslash.git] / gui.c

diff --git a/gui.c b/gui.c
index c21ee0289f6b9abdc0694bd3ba0eed7f7eb600c9..a3c07ec796bd9d179ef633b3d81d91c14b42c834 100644 (file)
--- a/gui.c
+++ b/gui.c
@@ -9,7 +9,6 @@
 #include <regex.h>
 #include <signal.h>
 #include <sys/types.h>
-#include <dirent.h>
 #include <curses.h>
 
 #include "gui.cmdline.h"
@@ -22,6 +21,7 @@
 #include "list.h"
 #include "sched.h"
 #include "signal.h"
+#include "version.h"
 
 /** define the array of error lists needed by para_gui */
 INIT_GUI_ERRLISTS;
@@ -33,10 +33,10 @@ static int signal_pipe;
 
 static struct win_data {
        WINDOW *win;
-       NCURSES_SIZE_T begx;
-       NCURSES_SIZE_T begy;
-       NCURSES_SIZE_T cols;
-       NCURSES_SIZE_T lines;
+       size_t begx;
+       size_t begy;
+       size_t cols;
+       size_t lines;
 } top, bot, sb, in, sep;
 
 #define RINGBUFFER_SIZE 512
@@ -99,7 +99,7 @@ static void com_reread_conf(void);
 static void com_enlarge_top_win(void);
 static void com_shrink_top_win(void);
 static void com_version(void);
-static void com_quit(void);
+__noreturn static void com_quit(void);
 static void com_refresh(void);
 static void com_ll_incr(void);
 static void com_ll_decr(void);
@@ -400,11 +400,13 @@ static int draw_top_rbe(unsigned *lines)
        rbe = ringbuffer_get(bot_win_rb, fvr);
        if (!rbe)
                return -1;
-       /* first rbe might be only partially visible */
-       offset = (*lines - bot.lines) * bot.cols;
        len = strlen(rbe->msg);
-       if (offset < 0 || len < offset)
-               return -1;
+       if (*lines > bot.lines) {
+               /* first rbe is only partially visible */
+               offset = (*lines - bot.lines) * bot.cols;
+               assert(offset <= len);
+       } else
+               offset = 0;
        wattron(bot.win, COLOR_PAIR(rbe->color));
        waddstr(bot.win, rbe->msg + offset);
        *lines = NUM_LINES(len - offset);
@@ -759,28 +761,36 @@ static void clear_all_items(void)
        }
 }
 
-static void init_colors(void)
+static void init_pair_or_die(short pair, short f, short b)
+{
+       if (init_pair(pair, f, b) == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
+}
+
+static void init_colors_or_die(void)
 {
        int i;
 
        if (!has_colors())
-               msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
-       start_color();
+               msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
+       if (start_color() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
        FOR_EACH_STATUS_ITEM(i)
                if (theme.data[i].len)
-                       init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
-       init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
-       init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
-       init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
-       init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
-       init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
-       init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
-       init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
-       init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
-       init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
+                       init_pair_or_die(i + 1, theme.data[i].fg,
+                               theme.data[i].bg);
+       init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
+       init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
+       init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
+       init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
+       init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
+       init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
+       init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
+       init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
+       init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 }
 
-/* (Re-)initialize the curses library. FIXME: Error checking. */
+/* (Re-)initialize the curses library. */
 static void init_curses(void)
 {
        curses_active = 1;
@@ -791,14 +801,18 @@ static void init_curses(void)
                        " (need at least %dx%d)\n", COLS, LINES,
                        theme.cols_min, theme.lines_min);
        curs_set(0); /* make cursor invisible, ignore errors */
-       nonl(); /* tell curses not to do NL->CR/NL on output */
-       noecho(); /* don't echo input */
-       cbreak(); /* take input chars one at a time, no wait for \n */
-       init_colors();
-       clear();
+       nonl(); /* do not NL->CR/NL on output, always returns OK */
+       /* don't echo input */
+       if (noecho() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
+       /* take input chars one at a time, no wait for \n */
+       if (cbreak() == ERR)
+               msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
+       init_colors_or_die();
+       clear(); /* ignore non-fatal errors */
        init_wins(theme.top_lines_default);
        print_all_items();
-       noecho(); /* don't echo input */
+       // noecho(); /* don't echo input */
 }
 
 static void check_sigchld(void)