commit 805283d1305f4099b7c59607ba85afc98c7c9588
from: Omar Polo <op@omarpolo.com>
date: Sat Mar 06 17:42:31 2021 UTC

[gemtext] fix append and set_buf

it wouldn't resume parsing well without these

commit - b2cd5e069649931daeb8619734b6e8c8dc697819
commit + 805283d1305f4099b7c59607ba85afc98c7c9588
blob - 58449fbf3f84e94d22c7a8d99f39a5fd3185a91d
blob + d9122de6004c046a2708f6e775be460fdbe46cd4
--- gemtext.c
+++ gemtext.c
@@ -336,6 +336,8 @@ append(struct parser *p, const char *buf, size_t len)
 	newlen = len + p->len;
 	if ((t = calloc(1, newlen)) == NULL)
 		return 0;
+	memcpy(t, p->buf, p->len);
+	memcpy(t + p->len, buf, len);
 	free(p->buf);
 	p->buf = t;
 	p->len = newlen;
@@ -348,8 +350,10 @@ set_buf(struct parser *p, const char *buf, size_t len)
 	free(p->buf);
 	p->buf = NULL;
 
-	if (len == 0)
+	if (len == 0) {
+		p->len = 0;
 		return 1;
+	}
 
 	if ((p->buf = calloc(1, len)) == NULL)
 		return 0;