X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=visor;a=blobdiff_plain;f=visor%2Fsrc%2Fterm.c;fp=visor%2Fsrc%2Fterm.c;h=5a167a6c8f903d789ae9deb8cd6a187d4e81a86b;hp=0000000000000000000000000000000000000000;hb=c21ad1b67f3bb33cda9a85006486a6d88116a731;hpb=05b4673efbeb372387b0a9359af5046afb87c8cf

diff --git a/visor/src/term.c b/visor/src/term.c
new file mode 100644
index 0000000..5a167a6
--- /dev/null
+++ b/visor/src/term.c
@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include "term.h"
+
+static void sighandler(int s);
+
+static int term_width, term_height;
+static int ttyfd = -1;
+static struct termios saved_term;
+
+
+int term_init(const char *ttypath)
+{
+	struct termios term;
+	struct winsize winsz;
+
+	if((ttyfd = open("/dev/tty", O_RDWR)) == -1) {
+		perror("failed to open /dev/tty");
+		return -1;
+	}
+	if(tcgetattr(ttyfd, &term) == -1) {
+		perror("failed to get terminal attr");
+		return -1;
+	}
+	saved_term = term;
+	term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+	term.c_oflag &= ~OPOST;
+	term.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+	term.c_cflag = (term.c_cflag & ~(CSIZE | PARENB)) | CS8;
+
+	if(tcsetattr(ttyfd, TCSAFLUSH, &term) == -1) {
+		perror("failed to change terminal attributes");
+		return -1;
+	}
+
+	ioctl(1, TIOCGWINSZ, &winsz);
+	term_width = winsz.ws_col;
+	term_height = winsz.ws_row;
+
+	signal(SIGWINCH, sighandler);
+	return 0;
+}
+
+void term_cleanup(void)
+{
+	tcsetattr(ttyfd, TCSAFLUSH, &saved_term);
+	close(ttyfd);
+	ttyfd = -1;
+}
+
+void term_clear(void)
+{
+	write(ttyfd, "\033[2J", 4);
+}
+
+int term_getchar(void)
+{
+	int res;
+	char c;
+	while((res = read(ttyfd, &c, 1)) < 0 && errno == EINTR);
+	if(res <= 0) return -1;
+	return c;
+}
+
+
+static void sighandler(int s)
+{
+	struct winsize winsz;
+
+	signal(s, sighandler);
+
+	switch(s) {
+	case SIGWINCH:
+		ioctl(1, TIOCGWINSZ, &winsz);
+		term_width = winsz.ws_col;
+		term_height = winsz.ws_row;
+		/* redraw */
+		break;
+
+	default:
+		break;
+	}
+}