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authorMattias Andrée <maandree@operamail.com>2015-09-12 03:28:10 +0200
committerMattias Andrée <maandree@operamail.com>2015-09-12 03:28:10 +0200
commit94d6a544615e8c420ae1390086364c4199c60e2b (patch)
treee6a60a47b8c681f04a6f9b1ff053fbda2f2cad08
parentarch does not use /libexec (diff)
downloadmongoclock-94d6a544615e8c420ae1390086364c4199c60e2b.tar.gz
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port to c + reduce flicker + use timerfd
Signed-off-by: Mattias Andrée <maandree@operamail.com>
-rw-r--r--.gitignore6
-rw-r--r--COPYING2
-rw-r--r--src/mongoclock.c304
3 files changed, 311 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore
index d9823b8..d623f8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,9 @@ __pycache__/
*.pdf
*.ps
*.dvi
+*.o
+*.out
+*.so
+*.su
+*.gch
+
diff --git a/COPYING b/COPYING
index 392a7fb..9774072 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,4 @@
-Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
+Copyright © 2013, 2015 Mattias Andrée (maandree@member.fsf.org)
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
diff --git a/src/mongoclock.c b/src/mongoclock.c
new file mode 100644
index 0000000..781b7b4
--- /dev/null
+++ b/src/mongoclock.c
@@ -0,0 +1,304 @@
+/**
+ * Copyright © 2013, 2015 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * Copying and distribution of this file, with or without modification,
+ * are permitted in any medium without royalty provided the copyright
+ * notice and this notice are preserved. This file is offered as-is,
+ * without any warranty. [GNU All Permissive License]
+ */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <time.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/timerfd.h>
+
+$<
+d() {
+ echo '"'"$(echo "$1" | sed -e 's/X/ /g' -e 's/\[/\\033\[7m /g' -e 's/\]/\\033\[m /g')"'"'
+}
+$>
+
+#define DX 16
+#define DY 12
+static const char* mongo_0[] = {$(d ' [XXXX] '),
+ $(d ' [XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [] [XX] '),
+ $(d '[XX] [] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XX] [XX] '),
+ $(d ' [XXXX] ')};
+
+static const char* mongo_1[] = {$(d ' [XX] '),
+ $(d ' [XXXX] '),
+ $(d ' [XXXXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XXXXXXXXXX] ')};
+
+static const char* mongo_2[] = {$(d ' [XXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d '[XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XXXXXXXXXXXX] ')};
+
+static const char* mongo_3[] = {$(d ' [XXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XXXXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXX] ')};
+
+static const char* mongo_4[] = {$(d ' [XX] '),
+ $(d ' [XXXX] '),
+ $(d ' [XXXXXX] '),
+ $(d ' [XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XXXXXXXXXXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XXXXXX] ')};
+
+static const char* mongo_5[] = {$(d '[XXXXXXXXXXXX] '),
+ $(d '[XX] '),
+ $(d '[XX] '),
+ $(d '[XX] '),
+ $(d '[XX] '),
+ $(d '[XXXXXXXXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXX] ')};
+
+static const char* mongo_6[] = {$(d ' [XXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d '[XX] '),
+ $(d '[XX] '),
+ $(d '[XXXXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXX] ')};
+
+static const char* mongo_7[] = {$(d '[XXXXXXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] ')};
+
+static const char* mongo_8[] = {$(d ' [XXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXX] ')};
+
+static const char* mongo_9[] = {$(d ' [XXXXXXXX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d '[XX] [XX] '),
+ $(d ' [XXXXXXXXXX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' [XXXX] ')};
+
+#define DC 16
+static const char* mongo_c[] = {$(d ' '),
+ $(d ' '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' '),
+ $(d ' '),
+ $(d ' '),
+ $(d ' '),
+ $(d ' [XX] '),
+ $(d ' [XX] '),
+ $(d ' '),
+ $(d ' ')};
+
+static const char** mongo_ds[] = {
+ mongo_0, mongo_1, mongo_2, mongo_3, mongo_4,
+ mongo_5, mongo_6, mongo_7, mongo_8, mongo_9};
+
+
+static volatile sig_atomic_t caught_sigterm = 0;
+static volatile sig_atomic_t caught_sigwinch = 1;
+
+
+#define t(...) do if ((__VA_ARGS__) < 0) goto fail; while (0)
+
+
+static void sigterm(int signo)
+{
+ caught_sigterm = 1;
+ (void) signo;
+}
+
+static void sigwinch(int signo)
+{
+ caught_sigwinch = 1;
+ (void) signo;
+}
+
+
+static void print_time(const char*** str, size_t y, size_t x)
+{
+ size_t r, c;
+
+ fprintf(stdout, "\033[%zu;1H\033[1J", y + 1);
+
+ for (r = 0; r < DY; r++)
+ {
+ fprintf(stdout, "\033[%zu;%zuH\033[1K", y + r + 1, x + 1);
+ for (c = 0; str[c] != NULL; c++)
+ fprintf(stdout, "%s", str[c][r]);
+ fprintf(stdout, "\033[0K");
+ }
+
+ fprintf(stdout, "\033[0J");
+ fflush(stdout);
+}
+
+
+int main(int argc, char* argv[])
+{
+ time_t now_;
+ struct tm* now;
+ const char** digits[9];
+ size_t x = 0, y = 0;
+ struct winsize winsize;
+ int small = 0, fd;
+ struct itimerspec itimerspec;
+ char _buf[8];
+
+ fprintf(stdout, "\033[?1049h\033[?25l");
+
+ t (clock_gettime(CLOCK_REALTIME, &(itimerspec.it_value)));
+ itimerspec.it_interval.tv_sec = 1;
+ itimerspec.it_interval.tv_nsec = 0;
+ itimerspec.it_value.tv_sec += 1;
+ itimerspec.it_value.tv_nsec = 0;
+ t (fd = timerfd_create(CLOCK_REALTIME, 0));
+ t (timerfd_settime(fd, TFD_TIMER_ABSTIME, &itimerspec, NULL));
+
+ signal(SIGTERM, sigterm);
+ signal(SIGQUIT, sigterm);
+ signal(SIGINT, sigterm);
+ signal(SIGWINCH, sigwinch);
+
+ while (!caught_sigterm)
+ {
+ if (caught_sigwinch)
+ {
+ caught_sigwinch = 0;
+ t (TEMP_FAILURE_RETRY(ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize)));
+ y = winsize.ws_row;
+ x = winsize.ws_col;
+ if (y < DY) small = 2;
+ else if (x < 4 * DX + DC) small = 2;
+ else if (x < 6 * DX + 2 * DC) small = 1;
+ else small = 0;
+ y -= DY;
+ x -= 4 * DX + DC;
+ if (!small)
+ x -= 2 * DX + DC;
+ y /= 2;
+ x /= 2;
+ }
+
+ if (small == 2)
+ {
+ fprintf(stdout, "\033[H\033[2J%s\n", "Screen is too small");
+ fflush(stdout);
+ pause();
+ continue;
+ }
+
+ now_ = time(NULL);
+ if (now_ == -1) goto fail;
+ now = localtime(&now_);
+ if (now == NULL) goto fail;
+
+ digits[0] = mongo_ds[now->tm_hour / 10];
+ digits[1] = mongo_ds[now->tm_hour % 10];
+ digits[2] = mongo_c;
+ digits[3] = mongo_ds[now->tm_min / 10];
+ digits[4] = mongo_ds[now->tm_min % 10];
+ digits[5] = small ? NULL : mongo_c;
+ digits[6] = mongo_ds[now->tm_sec / 10];
+ digits[7] = mongo_ds[now->tm_sec % 10];
+ digits[8] = NULL;
+
+ print_time(digits, y, x);
+
+ if (read(fd, _buf, 8) < 0)
+ if (errno != EINTR)
+ goto fail;
+ }
+
+ fprintf(stdout, "\033[?25h\n\033[?1049l");
+ fflush(stdout);
+ TEMP_FAILURE_RETRY(close(fd));
+ return 0;
+
+ fail:
+ perror(*argv);
+ fprintf(stdout, "\033[?25h\n\033[?1049l");
+ fflush(stdout);
+ TEMP_FAILURE_RETRY(close(fd));
+ return 1;
+ (void) argc;
+}
+