Make ext/soap work around libxml2 bug in xmlCheckUTF8 (2.6.7-2.6.13)

Author: dstogov

ext/soap/php_encoding.c

@@ -581,6 +581,32 @@ static zval *to_zval_stringb(encodeTypePtr type, xmlNodePtr data)
 	return ret;
 }
 
+static int php_soap_xmlCheckUTF8(const unsigned char *s)
+{
+	int i;
+	unsigned char c;
+
+	for (i = 0; (c = s[i++]);) {
+		if ((c & 0x80) == 0) {
+		} else if ((c & 0xe0) == 0xc0) {
+			if ((s[i++] & 0xc0) != 0x80) {
+				return 0;
+			}
+		} else if ((c & 0xf0) == 0xe0) {
+			if ((s[i++] & 0xc0) != 0x80 || (s[i++] & 0xc0) != 0x80) {
+				return 0;
+			}
+		} else if ((c & 0xf8) == 0xf0) {
+			if ((s[i++] & 0xc0) != 0x80 || (s[i++] & 0xc0) != 0x80 || (s[i++] & 0xc0) != 0x80) {
+				return 0;
+			}
+		} else {
+			return 0;
+		}
+	}
+	return 1;
+}
+
 static xmlNodePtr to_xml_string(encodeTypePtr type, zval *data, int style, xmlNodePtr parent)
 {
 	xmlNodePtr ret;
@@ -612,12 +638,12 @@ static xmlNodePtr to_xml_string(encodeTypePtr type, zval *data, int style, xmlNo
 			efree(str);
 			str = estrdup(xmlBufferContent(out));
 			new_len = n;
-		} else if (!xmlCheckUTF8(str)) {
+		} else if (!php_soap_xmlCheckUTF8(str)) {
 			soap_error1(E_ERROR,  "Encoding: string '%s' is not a valid utf-8 string", str);
 		}
 		xmlBufferFree(out);
 		xmlBufferFree(in);
-	} else if (!xmlCheckUTF8(str)) {
+	} else if (!php_soap_xmlCheckUTF8(str)) {
 		soap_error1(E_ERROR,  "Encoding: string '%s' is not a valid utf-8 string", str);
 	}