// Check if it is a valid array signature
bool FieldType::is_valid_array_signature(symbolOop sig) {
assert(sig->utf8_length() > 1, "this should already have been checked");
assert(sig->byte_at(0) == '[', "this should already have been checked");
// The first character is already checked
int i = 1;
int len = sig->utf8_length();
// First skip all '['s
while(i < len - 1 && sig->byte_at(i) == '[') i++;
// Check type
switch(sig->byte_at(i)) {
case 'B': // T_BYTE
case 'C': // T_CHAR
case 'D': // T_DOUBLE
case 'F': // T_FLOAT
case 'I': // T_INT
case 'J': // T_LONG
case 'S': // T_SHORT
case 'Z': // T_BOOLEAN
// If it is an array, the type is the last character
return (i + 1 == len);
case 'L':
// If it is an object, the last character must be a ';'
return sig->byte_at(len - 1) == ';';
}
return false;
}
static bool is_obj(symbolOop signature) {
int sig_length = signature->utf8_length();
// Must start with 'L' and end with ';'
return (sig_length >= 2 &&
(signature->byte_at(0) == 'L') &&
(signature->byte_at(sig_length - 1) == ';'));
}
// Testing
static bool is_array(symbolOop signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); }