support \r

headers/ctype.h

@@ -9,7 +9,9 @@ int isdigit(int c);
 /*
 int isgraph(int c);
 int islower(int c);
+*/
 int isprint(int c);
+/*
 int ispunct(int c);
 int isspace(int c);
 int isupper(int c);

src/ctype/isprint.c

@@ -0,0 +1,4 @@
+int	isprint(int c)
+{
+	return (32 <= c && c < 127);
+}

src/terminal/terminal.c

@@ -1,5 +1,6 @@
 #include "terminal.h"
 #include "string.h"
+#include "ctype.h"
 
 #include <stdbool.h>
 #include <stddef.h>
@@ -50,6 +51,14 @@ void terminal_putentryat(char c, uint8_t color, size_t x, size_t y)
 
 int terminal_putchar(char c) 
 {
+	if (c == '\r')
+		terminal_row = 0;
+	else if (c == '\n') {
+		terminal_column = 0;
+		terminal_row++;
+	}
+	if (!isprint(c))
+		return 1;
 	terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
 	if (++terminal_column == VGA_WIDTH) {
 		terminal_column = 0;