Feat: Keyboard strokes working and in buffer

stdio.h

@@ -4,6 +4,7 @@
 #include "types.h"
 #include <stdarg.h>
 #include <stddef.h>
+#include <stdint.h>
 
 #define VGA_WIDTH 80
 #define VGA_HEIGHT 25
@@ -21,9 +22,9 @@
 #define SCANCODE_CAPSLOCK 0x3A
 #define RELEASE_MASK 0x80
 
-static char _keyboard_buffer[KEYBOARD_BUFFER_SIZE];
-static uint16_t _kb_head = 0;
-static uint16_t _kb_tail = 0;
+static volatile unsigned char _keyboard_buffer[KEYBOARD_BUFFER_SIZE];
+static volatile uint16_t _kb_head = 0;
+static volatile uint16_t _kb_tail = 0;
 
 static char __g_shift_pressed = 0;
 static char __g_caps_lock_active = 0;
@@ -396,7 +397,7 @@ static inline char __keyboard_buffer_pop() {
 }
 
 static inline char __convert_ascii(uint8_t __scancode) {
-	char __code = __scancode & ~RELEASE_MASK;
+	unsigned char __code = __scancode & ~RELEASE_MASK;
 	if (__scancode & 0x80) {
 		// Key-released
 		if (__code == SCANCODE_LSHIFT || __code == SCANCODE_RSHIFT) {
@@ -434,12 +435,61 @@ static inline char __convert_ascii(uint8_t __scancode) {
 	return __char;
 }
 
+uint8_t __scancode_h[128] = {0};
+static uint32_t __total_isr_calls = 0;
+
 void __keyboard_handle_scancode(uint8_t __scancode) {
-    char __temp = __convert_ascii(__scancode); 
-    if (__temp == '\0') {
-        return;
-    }
-    __keyboard_buffer_push(__temp);
+	__total_isr_calls++;
+
+	char __temp = __convert_ascii(__scancode);
+	static uint8_t __index = 0;
+
+	if (__index < sizeof(__scancode_h)) {
+		__scancode_h[__index++] = __scancode;
+	}
+
+	if (__temp == '\0') {
+		return;
+	}
+	__keyboard_buffer_push(__temp);
+}
+
+void __dump_scancode_history() {
+	printf("Scancode History: \n");
+    printf("Total ISR Calls: %u\n", __total_isr_calls);
+	for (size_t i = 0; i < sizeof(__scancode_h); i++) {
+		if (__scancode_h[i] != 0) {
+			printf("[%x] = %c\n", __scancode_h[i], __convert_ascii(__scancode_h[i]));
+		}
+	}
+	printf("\n");
+}
+
+static inline char __gets_internal(char *buffer, size_t max_length) {
+	size_t index = 0;
+	char __c;
+
+	while (index < max_length - 1) {
+		__c = __keyboard_buffer_pop();
+
+		if (__c == '\0') {
+			continue;
+		}
+
+		if (__c == '\n' || __c == '\r') {
+			buffer[index] = '\0';
+			break;
+		}
+
+		buffer[index++] = __c;
+	}
+
+	buffer[index] = '\0';
+	return index;
+}
+
+void gets(char *buffer, size_t max_length) {
+	__gets_internal(buffer, max_length);
 }
 
 /*
@@ -509,7 +559,6 @@ int scanf(const char *fmt, ...) {
 	va_end(args);
 	return result;
 }
-
 */
 
 #endif