commit 51762770ad906c93ca83830aee8d17f8acba8c29
from: Omar Polo <op@omarpolo.com>
date: Sat Dec 24 17:01:15 2022 UTC

iri: lowercase scheme and host (part of URI normalization)

commit - 36f94f06b08270ab5d4465aa61ae025c98e24c2c
commit + 51762770ad906c93ca83830aee8d17f8acba8c29
blob - ac838023e0eb83c222129878c8b2b0eb79b3da8b
blob + 31e85d1dd2901bc5a50da2e55c2c0a8892e79c27
--- iri.c
+++ iri.c
@@ -418,6 +418,13 @@ parse(const char *s, struct iri *iri)
 	return (0);
 }
 
+static inline void
+lowerify(char *s)
+{
+	for (; *s; ++s)
+		*s = tolower((unsigned char)*s);
+}
+
 static void
 cpfields(struct iri *dest, const struct iri *src, int flags)
 {
@@ -426,6 +433,7 @@ cpfields(struct iri *dest, const struct iri *src, int 
 		if (src->iri_flags & IH_SCHEME)
 			memcpy(dest->iri_scheme, src->iri_scheme,
 			    sizeof(dest->iri_scheme));
+		lowerify(dest->iri_scheme);
 	}
 	if (flags & IH_UINFO) {
 		dest->iri_flags |= IH_UINFO;
@@ -438,6 +446,7 @@ cpfields(struct iri *dest, const struct iri *src, int 
 		if (src->iri_flags & IH_HOST)
 			memcpy(dest->iri_host, src->iri_host,
 			    sizeof(dest->iri_host));
+		lowerify(dest->iri_host);
 	}
 	if (flags & IH_PORT) {
 		dest->iri_flags |= IH_PORT;