copy paste now functional

c_clipboard.c

@@ -0,0 +1,35 @@
+void
+c_copy(char *c) {
+	c += 2;
+	int start = atoi(c);
+	for(; *c != '\0' && *c != ' '; c++);
+	int end = atoi(c);
+	Row *cpy_start = b_getline(buffer, start);
+	if(cpy_start == NULL || b_getline(buffer, end) == NULL) {
+		puts("invalid line.");
+		return;
+	}
+	if (clipboard != NULL) {
+		b_truncate(clipboard);
+		free(clipboard);
+	}
+	clipboard = calloc(1, sizeof(Row));
+	Row *dest = clipboard;
+	for (int i = start; i <= end; i++) {
+		memcpy(dest->text, cpy_start->text, ROW_SIZE);
+		cpy_start = cpy_start->n;
+		dest = b_insert(dest);
+	}
+}
+
+void
+c_paste(char *c) {
+	Row *line = b_getline(buffer, atoi(c + 2));
+	if (line == NULL) {puts("invalid line."); return; }
+	if (clipboard == NULL) {puts("empty clipboard"); return; }
+	for (Row *cb = clipboard; cb->n != NULL; cb = cb->n) {
+		line = b_insert(line);
+		memcpy(line->text, cb->text, ROW_SIZE);
+	}
+}
+

c_indent.c

@@ -18,6 +18,7 @@ c_unindent(char *c) {
 	for(int i = 0; i < ROW_SIZE - 1; i++) {
 		row->text[i] = row->text[i + 1];
 	}
-	row->text[ROW_SIZE] = 0;
+	row->text[ROW_SIZE - 1] = 0;
 }
 
+

commands.c

@@ -9,5 +9,9 @@ NULL,
 ['['] = c_unindent,
 [']'] = c_indent,
 ['d'] = c_delete,
+['c'] = c_copy,
+['v'] = c_paste,
 };
 
+
+

efn.c

@@ -22,5 +22,7 @@
 #include "c_indent.c"
 #include "c_delete.c"
 
+#include "c_clipboard.c"
 #include "commands.c"
 
+

globals.h

@@ -1,3 +1,5 @@
 Row init_row = { 0 };
 Row *buffer = &init_row;
 
+Row *clipboard = NULL;
+