BUILD: tree-wide: cast arguments to tolower/toupper to unsigned char (2)

Fix build warning on NetBSD by reapplying f278eec37a ("BUILD: tree-wide:
cast arguments to tolower/toupper to unsigned char").

This should fix issue #2551.

include/haproxy/tools.h

@@ -1192,7 +1192,7 @@ static inline void update_char_fingerprint(uint8_t *fp, char prev, char curr)
 	switch (prev) {
 	case 0:         from = 28; break; // begin
 	case 'a'...'z': from = prev - 'a' + 1; break;
-	case 'A'...'Z': from = tolower(prev) - 'a' + 1; break;
+	case 'A'...'Z': from = tolower((unsigned char)prev) - 'a' + 1; break;
 	case '0'...'9': from = 27; break;
 	default:        from = 28; break;
 	}
@@ -1200,7 +1200,7 @@ static inline void update_char_fingerprint(uint8_t *fp, char prev, char curr)
 	switch (curr) {
 	case 0:         to = 28; break; // end
 	case 'a'...'z': to = curr - 'a' + 1; break;
-	case 'A'...'Z': to = tolower(curr) - 'a' + 1; break;
+	case 'A'...'Z': to = tolower((unsigned char)curr) - 'a' + 1; break;
 	case '0'...'9': to = 27; break;
 	default:        to = 28; break;
 	}

src/resolvers.c

@@ -836,7 +836,7 @@ static void resolv_check_response(struct resolv_resolution *res)
 
 				/* convert the key to lookup in lower case */
 				for (i = 0 ; item->data.target[i] ; i++)
-					target[i] = tolower(item->data.target[i]);
+					target[i] = tolower((unsigned char)item->data.target[i]);
 				target[i] = 0;
 
 				node = ebis_lookup(&srvrq->named_servers, target);
@@ -1810,7 +1810,7 @@ int resolv_dn_label_to_str(const char *dn, int dn_len, char *str, int str_len)
 			*ptr++ = '.';
 		/* copy the string at i+1 to lower case */
 		for (; sz > 0; sz--)
-			*(ptr++) = tolower(dn[++i]);
+			*(ptr++) = tolower((unsigned char)dn[++i]);
 	}
 	*ptr++ = '\0';
 	return (ptr - str);
@@ -1850,7 +1850,7 @@ int resolv_str_to_dn_label(const char *str, int str_len, char *dn, int dn_len)
 			offset = i+1;
 			continue;
 		}
-		dn[i+1] = tolower(str[i]);
+		dn[i+1] = tolower((unsigned char)str[i]);
 	}
 	dn[offset] = i - offset;
 	dn[i+1] = '\0';

src/server_state.c

@@ -422,7 +422,7 @@ static void srv_state_srv_update(struct server *srv, int version, char **params)
 		 * lookup is case sensitive but we don't care
 		 */
 		for (i = 0; tmp[i]; i++)
-			tmp[i] = tolower(tmp[i]);
+			tmp[i] = tolower((unsigned char)tmp[i]);
 
 		/* insert in tree and set the srvrq expiration date */
 		ebis_insert(&srv->srvrq->named_servers, &srv->host_dn);

src/ssl_clienthello.c

@@ -345,7 +345,7 @@ int ssl_sock_switchctx_cbk(SSL *ssl, int *al, void *arg)
 sni_lookup:
 	/* we need to transform this a NULL-ended string in lowecase */
 	for (i = 0; i < trash.size && i < servername_len; i++)
-		trash.area[i] = tolower(servername[i]);
+		trash.area[i] = tolower((unsigned char)servername[i]);
 	trash.area[i] = 0;
 
 	HA_RWLOCK_RDLOCK(SNI_LOCK, &s->sni_lock);
@@ -630,7 +630,7 @@ int ssl_sock_switchctx_wolfSSL_cbk(WOLFSSL* ssl, void* arg)
 
 	/* we need to transform this into a NULL-ended string in lowecase */
 	for (i = 0; i < trash.size && servername[i] != '\0'; i++)
-		trash.area[i] = tolower(servername[i]);
+		trash.area[i] = tolower((unsigned char)servername[i]);
 	trash.area[i] = 0;
 	servername = trash.area;
 

src/ssl_sample.c

@@ -1484,7 +1484,7 @@ smp_fetch_ssl_fc_ec(const struct arg *args, struct sample *smp, const char *kw,
 		int i;
 
 		for (i = 0; curve_name[i]; i++)
-			curve_name[i] = toupper(curve_name[i]);
+			curve_name[i] = toupper((unsigned char)curve_name[i]);
 	}
 # else
 	nid = SSL_get_negotiated_group(ssl);

src/tools.c

@@ -6260,10 +6260,10 @@ void update_word_fingerprint(uint8_t *fp, const char *word)
 
 	from = 28; // begin
 	for (p = word; *p; p++) {
-		c = tolower(*p);
+		c = tolower((unsigned char)*p);
 		switch(c) {
 		case 'a'...'z': to = c - 'a' + 1; break;
-		case 'A'...'Z': to = tolower(c) - 'a' + 1; break;
+		case 'A'...'Z': to = tolower((unsigned char )c) - 'a' + 1; break;
 		case '0'...'9': to = 27; break;
 		default:        to = 28; break;
 		}

src/uri_normalizer.c

@@ -177,8 +177,8 @@ enum uri_normalizer_err uri_normalizer_percent_upper(const struct ist input, int
 			if (istlen(scanner) >= 2) {
 				if (ishex(istptr(scanner)[0]) && ishex(istptr(scanner)[1])) {
 					output = __istappend(output, current);
-					output = __istappend(output, toupper(istshift(&scanner)));
-					output = __istappend(output, toupper(istshift(&scanner)));
+					output = __istappend(output, toupper((unsigned char)istshift(&scanner)));
+					output = __istappend(output, toupper((unsigned char)istshift(&scanner)));
 					continue;
 				}
 			}