Add cursor movement

1 files changed, 42 insertions, 0 deletions

diff --git a/string_builder.c b/string_builder.c
new file mode 100644
index 0000000..fa26e44
--- /dev/null
+++ b/string_builder.c
@@ -0,0 +1,42 @@
+/*
+ * Terminal Text Editor
+ * Copyright (C) 2022 Johnny Richard
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include "string_builder.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+void
+string_builder_append(string_builder_t *sb, const char *s, int len)
+{
+  char *snew = realloc(sb->data, sb->len + len);
+
+  if (snew == NULL) {
+    return;
+  }
+
+  memcpy(&snew[sb->len], s, len);
+  sb->data = snew;
+  sb->len += len;
+}
+
+void
+string_builder_destroy(string_builder_t *sb)
+{
+  free(sb->data);
+}
+