a beginning

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 184 insertions, 0 deletions

diff --git a/src/rq.c b/src/rq.c
new file mode 100644
index 0000000..0964bc2
--- /dev/null
+++ b/src/rq.c
@@ -0,0 +1,184 @@
+/**
+ * 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;
+}
+