Add mg_strcasecmp()

CL: Add mg_strcasecmp()

PUBLISHED_FROM=cd2a26fa12473bfa0f5e7a0a1d34fb86562ee082

mongoose.c

@@ -1764,8 +1764,10 @@ int mg_strcmp(const struct mg_str str1, const struct mg_str str2) WEAK;
 int mg_strcmp(const struct mg_str str1, const struct mg_str str2) {
   size_t i = 0;
   while (i < str1.len && i < str2.len) {
-    if (str1.p[i] < str2.p[i]) return -1;
-    if (str1.p[i] > str2.p[i]) return 1;
+    int c1 = str1.p[i];
+    int c2 = str2.p[i];
+    if (c1 < c2) return -1;
+    if (c1 > c2) return 1;
     i++;
   }
   if (i < str1.len) return 1;
@@ -1787,6 +1789,21 @@ int mg_strncmp(const struct mg_str str1, const struct mg_str str2, size_t n) {
   return mg_strcmp(s1, s2);
 }
 
+int mg_strcasecmp(const struct mg_str str1, const struct mg_str str2) WEAK;
+int mg_strcasecmp(const struct mg_str str1, const struct mg_str str2) {
+  size_t i = 0;
+  while (i < str1.len && i < str2.len) {
+    int c1 = tolower((int) str1.p[i]);
+    int c2 = tolower((int) str2.p[i]);
+    if (c1 < c2) return -1;
+    if (c1 > c2) return 1;
+    i++;
+  }
+  if (i < str1.len) return 1;
+  if (i < str2.len) return -1;
+  return 0;
+}
+
 void mg_strfree(struct mg_str *s) WEAK;
 void mg_strfree(struct mg_str *s) {
   char *sp = (char *) s->p;

mongoose.h

@@ -2351,6 +2351,11 @@ int mg_strcmp(const struct mg_str str1, const struct mg_str str2);
  */
 int mg_strncmp(const struct mg_str str1, const struct mg_str str2, size_t n);
 
+/*
+ * Compare two `mg_str`s ignoreing case; return value is the same as `strcmp`.
+ */
+int mg_strcasecmp(const struct mg_str str1, const struct mg_str str2);
+
 /*
  * Free the string (assuming it was heap allocated).
  */
@@ -6239,6 +6244,7 @@ int mg_dns_encode_record(struct mbuf *io, struct mg_dns_resource_record *rr,
  * Encodes a DNS name.
  */
 int mg_dns_encode_name(struct mbuf *io, const char *name, size_t len);
+int mg_dns_encode_name_s(struct mbuf *io, struct mg_str name);
 
 /* Low-level: parses a DNS response. */
 int mg_parse_dns(const char *buf, int len, struct mg_dns_message *msg);