Rewrote md stuff and made it more compliant

src/util.c

@@ -0,0 +1,79 @@
+/*
+   ncdg - A program to help generate natechoe.dev
+   Copyright (C) 2022  Nate Choe (natechoe9@gmail.com)
+
+   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 <stdlib.h>
+#include <string.h>
+
+#include <util.h>
+
+struct string *newstring() {
+	struct string *ret;
+	ret = malloc(sizeof *ret);
+	if (ret == NULL)
+		return NULL;
+	ret->len = 0;
+	ret->alloc = 20;
+	ret->data = malloc(ret->alloc);
+	if (ret->data == NULL)
+		return NULL;
+	return ret;
+}
+
+void freestring(struct string *str) {
+	free(str->data);
+	free(str);
+}
+
+int appendcharstring(struct string *str, char c) {
+	if (str->len >= str->alloc) {
+		char *newdata;
+		size_t newalloc;
+		newalloc = str->alloc * 2;
+		newdata = realloc(str->data, newalloc);
+		if (newdata == NULL) {
+			return 1;
+		}
+		str->data = newdata;
+		str->alloc = newalloc;
+	}
+	str->data[str->len++] = c;
+	return 0;
+}
+
+int appendstrstring(struct string *str, char *s) {
+	size_t len;
+	len = strlen(s);
+	if (str->len + len >= str->alloc) {
+		char *newdata;
+		size_t newalloc;
+		newalloc = str->alloc;
+		while (str->len + len >= newalloc)
+			newalloc *= 2;
+		newdata = realloc(str->data, newalloc);
+		if (newdata == NULL)
+			return 1;
+		str->data = newdata;
+		str->alloc = newalloc;
+	}
+	memcpy(str->data + str->len, s, len);
+	str->len += len;
+	return 0;
+}
+
+void resetstring(struct string *str) {
+	str->len = 0;
+}