kilo

commit bb776044e326d7eba00f0bc22b9b338defb36525
Author: Dimitrije Dobrota <mail@dimitrijedobrota.com>
Date:   Fri,  7 Apr 2023 20:22:08 +0200

Initial commit, entering raw mode

Diffstat:
A
.gitignore
 | 
1
+
A
Makefile
 | 
2
++
A
kilo.c
 | 
62
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 65 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+kilo
diff --git a/Makefile b/Makefile
@@ -0,0 +1,2 @@
+kilo : kilo.c
+	$(CC) kilo.c -o kilo -Wall -Wextra -pedantic -std=c99
diff --git a/kilo.c b/kilo.c
@@ -0,0 +1,62 @@
+/*** includes ***/
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+
+/*** data ***/
+
+struct termios orig_termios;
+
+/*** terminal ***/
+
+void die(const char *s) {
+  perror(s);
+  exit(1);
+}
+
+void disableRawMode() {
+  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1)
+    die("tcsetattr");
+}
+
+void enableRawMode() {
+  if (tcgetattr(STDIN_FILENO, &orig_termios) == -1)
+    die("tcgetattr");
+  atexit(disableRawMode);
+
+  struct termios raw = orig_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() {
+  enableRawMode();
+
+  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;
+}