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-rw-r--r--src/rq.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/src/rq.c b/src/rq.c
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+++ b/src/rq.c
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+/**
+ * MIT/X Consortium License
+ *
+ * Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#define t(...) do { if (__VA_ARGS__) goto fail; } while (0)
+
+
+
+/**
+ * The default word rate.
+ */
+#define DEFAULT_RATE 120 /* 2 hz */
+
+
+
+/**
+ * The name of the process.
+ */
+static const char *argv0;
+
+
+
+/**
+ * Get the selected word rate by reading
+ * the environment variable RQ_RATE.
+ *
+ * @return The rate in words per minute.
+ */
+static long get_word_rate(void)
+{
+ char *s;
+ char *e;
+ long r;
+
+ errno = 0;
+ s = getenv("RQ_RATE");
+ if (!s || !*s || !isdigit(*s))
+ return DEFAULT_RATE;
+
+ r = strtol(s, &e, 10);
+ if (r <= 0)
+ return DEFAULT_RATE;
+ while (*e == ' ')
+ e++;
+
+ if (!*e) r *= 1;
+ else if (!strcasecmp(e, "wpm")) r *= 1;
+ else if (!strcasecmp(e, "w/m")) r *= 1;
+ else if (!strcasecmp(e, "/m")) r *= 1;
+ else if (!strcasecmp(e, "wpmin")) r *= 1;
+ else if (!strcasecmp(e, "w/min")) r *= 1;
+ else if (!strcasecmp(e, "/min")) r *= 1;
+ else if (!strcasecmp(e, "wps")) r *= 60;
+ else if (!strcasecmp(e, "w/s")) r *= 60;
+ else if (!strcasecmp(e, "/s")) r *= 60;
+ else if (!strcasecmp(e, "wpsec")) r *= 60;
+ else if (!strcasecmp(e, "w/sec")) r *= 60;
+ else if (!strcasecmp(e, "/sec")) r *= 60;
+ else if (!strcasecmp(e, "hz")) r *= 60;
+ else
+ return DEFAULT_RATE;
+
+ return r;
+}
+
+
+
+int main(int argc, char *argv[])
+{
+ int dashed = 0;
+ long rate = get_word_rate();
+ char *file = NULL;
+ char *arg;
+ int fd = -1, ttyfd = -1, tty_configured = 0;
+ struct termios stty;
+ struct termios saved_stty;
+ struct stat _attr;
+
+ /* Check that we have a stdout. */
+ if (fstat(STDOUT_FILENO, &_attr))
+ t (errno == EBADF);
+
+ /* Parse arguments. */
+ argv0 = argv ? (argc--, *argv++) : "rq";
+ while (argc) {
+ if (!dashed && !strcmp(*argv, "--")) {
+ dashed = 1;
+ argv++;
+ argc--;
+ } else if (!dashed && **argv == '-') {
+ arg = *argv++;
+ argc--;
+ for (arg++; *arg; arg++) {
+ goto usage;
+ }
+ } else {
+ if (file)
+ goto usage;
+ file = *argv++;
+ argc--;
+ }
+ }
+
+ /* Open file. */
+ if (!file || !strcmp(file, "-")) {
+ fd = STDIN_FILENO;
+ } else {
+ fd = open(file, O_RDONLY);
+ t (fd == -1);
+ }
+
+ /* Get a readable file descriptor for the controlling terminal. */
+ ttyfd = open("/dev/tty", O_RDONLY);
+ t (ttyfd == -1);
+
+ /* Configure terminal. */
+ t (fprintf(stdout, "\033[?1049h\033[?25l") < 0);
+ t (fflush(stdout));
+ t (tcgetattr(ttyfd, &stty));
+ saved_stty = stty;
+ stty.c_lflag &= (tcflag_t)~(ICANON | ECHO | ISIG);
+ t (tcsetattr(ttyfd, TCSAFLUSH, &stty));
+ tty_configured = 1;
+
+ /* TODO Display file. */
+
+ /* Restore terminal configurations. */
+ tcsetattr(ttyfd, TCSAFLUSH, &saved_stty);
+ fprintf(stdout, "\033[?25h\033[?1049l");
+ fflush(stdout);
+ tty_configured = 0;
+
+ close(fd);
+ close(ttyfd);
+ return 0;
+
+fail:
+ perror(argv0);
+ if (tty_configured) {
+ tcsetattr(ttyfd, TCSAFLUSH, &saved_stty);
+ fprintf(stdout, "\033[?25h\033[?1049l");
+ fflush(stdout);
+ }
+ if (fd >= 0)
+ close(fd);
+ if (ttyfd >= 0)
+ close(ttyfd);
+ return 1;
+
+usage:
+ fprintf(stderr, "%s: Invalid arguments, see `man 1 rp'.\n", argv0);
+ return 2;
+}
+