First commit, need to add more helper methods for buffer (e.g. backspace, insert character, etc.)

editor.c

@@ -0,0 +1,116 @@
+#include <stdio.h>
+#include <ncurses.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <stdbool.h>
+
+typedef struct Buffer_struct Buffer;
+struct Buffer_struct {
+	char* text;
+	char* start;
+	char* end;
+	int size;
+	int gap_size;
+};
+
+Buffer* new_buffer(int size) {
+	Buffer* buffer = malloc(sizeof(Buffer));
+	buffer->size = size;
+	buffer->text = malloc(buffer->size);
+
+	buffer->gap_size = size;
+	buffer->start = buffer->text;
+	buffer->end = buffer->start + buffer->gap_size;
+	return buffer;
+}
+
+void buffer_grow(Buffer* buffer) {
+	int start_offset = buffer->start - buffer->text;
+	buffer->size *= 2;
+	buffer->text = realloc(buffer->text,buffer->size);
+	buffer->start = buffer->text + start_offset;
+
+	buffer->gap_size = 10;
+	for (int i=strlen(buffer->text)-1; i > (buffer->start - buffer->text); i--) {
+		*(buffer->text + i + buffer->gap_size) = *(buffer->start + i);
+		*(buffer->start + i) = 0;
+	}
+
+	buffer->end = buffer->start + buffer->gap_size;
+}
+
+void buffer_insert(char ch, Buffer* buffer) {
+	*(buffer->start) = ch;
+	buffer->start++;
+	buffer->gap_size--;
+	if (buffer->gap_size == 0) {
+		buffer_grow(buffer);
+	}
+}
+
+void buffer_right(Buffer* buffer) {
+	buffer->start++;
+	buffer->end--;
+}
+
+void buffer_left(Buffer* buffer) {
+	buffer->start--;
+	buffer->end--;
+	
+
+}
+
+void init_curses() {
+	initscr();
+	noecho();
+	keypad(stdscr,TRUE);
+	cbreak();
+}
+
+void sigint_handler(int dummy) {
+	endwin();
+	exit(130);
+}
+
+int main() {
+	signal(SIGINT,sigint_handler);
+
+	Buffer* buffer = new_buffer(10);
+	init_curses();
+	int ch;
+	while (true) {
+		clear();
+
+		int i=0;
+		if (buffer->start != buffer->text) {  /* We don't want to print the string, if the 
+							gap starts at the first index of the string */
+
+	                while (i < strlen(buffer->text)) {
+	                        addch(*(buffer->text + i));
+				i++;
+	                        if ((buffer->start - buffer->text) == i) {  /* If we have encountered 
+										the start of the gap */
+	                                i += buffer->gap_size;
+				}
+	                }
+		}
+
+		ch = getch();
+
+		switch(ch) {
+			case KEY_BACKSPACE:
+				if (buffer->start != buffer->text) {
+					buffer->start--;
+					buffer->gap_size++;
+				}
+				goto continue_while_loop;
+			default:
+		}
+		buffer_insert(ch,buffer);
+
+		continue_while_loop:
+
+	}
+	endwin();
+}