From 8eeb38784aa4ab68c8bfbb9f8e6c5d191e4ac09d Mon Sep 17 00:00:00 2001
From: ivarlovlie <git@ivarlovlie.no>
Date: Sun, 10 Jan 2021 18:36:03 +0100
Subject: initial commit, done with chapter 2 (raw mode)

---
 kilo.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 kilo.c

(limited to 'kilo.c')

diff --git a/kilo.c b/kilo.c
new file mode 100644
index 0000000..836fb32
--- /dev/null
+++ b/kilo.c
@@ -0,0 +1,63 @@
+/*** includes ***/
+
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+
+/*** data ***/
+
+struct termios original_termios;
+
+/*** terminal ***/
+
+void die(const char *s) {
+    perror(s);
+    exit(1);
+}
+
+void disable_raw_mode() {
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &original_termios) == -1) {
+        die("tcsetattr");
+    }
+}
+
+void enable_raw_mode() {
+    if (tcgetattr(STDIN_FILENO, &original_termios) == -1) {
+        die("tcgetattr");
+    }
+    atexit(disable_raw_mode);
+
+    struct termios raw = original_termios;
+    raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+    raw.c_oflag &= ~(OPOST);
+    raw.c_cflag |= (CS8);
+    raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+    raw.c_cc[VMIN] = 0;
+    raw.c_cc[VTIME] = 1;
+
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
+        die("tcsetattr");
+    }
+}
+
+/*** init ***/
+
+int main() {
+    enable_raw_mode();
+    while (1) {
+        char c = '\0';
+        if (read(STDIN_FILENO, &c, 1) == -1 && errno != EAGAIN) {
+            die("read");
+        }
+        if (iscntrl(c)) {
+            printf("%d\r\n", c);
+        } else {
+            printf("%d ('%c')\r\n", c, c);
+        }
+        if (c == 'q') break;
+    }
+    return 0;
+}
-- 
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