// 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;
}
void FieldType::skip_optional_size(symbolOop signature, int* index) {
jchar c = signature->byte_at(*index);
while (c >= '0' && c <= '9') {
*index = *index + 1;
c = signature->byte_at(*index);
}
}
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) == ';'));
}
static bool print_selector_with_arguments(prettyPrintStream* output,
symbolOop selector,
GrowableArray<astNode*>* arguments,
bool split) {
if (selector->is_binary()) {
// binary send
output->print(selector->as_string());
output->space();
astNode* arg = arguments->at(0);
bool wrap = should_wrap(1, arg);
if (wrap) output->print("(");
bool result = arg->print(output);
if (wrap) output->print(")");
return result;
}
int arg = arguments->length();
if (arg == 0) {
output->print(selector->as_string());
return false;
}
for (int index = 1; index <= selector->length(); index++) {
int c = selector->byte_at(index);
output->print_char(c);
if (c == ':') {
output->space();
astNode* a = arguments->at(--arg);
bool wrap = should_wrap(2, a);
if (wrap) output->print("(");
a->print(output);
if (wrap) output->print(")");
if (index < selector->length()) {
if (split) output->newline();
else output->space();
}
}
}
return split;
}
BasicType FieldType::get_array_info(symbolOop signature, jint* dimension, symbolOop* object_key, TRAPS) {
assert(basic_type(signature) == T_ARRAY, "must be array");
int index = 1;
int dim = 1;
skip_optional_size(signature, &index);
while (signature->byte_at(index) == '[') {
index++;
dim++;
skip_optional_size(signature, &index);
}
ResourceMark rm;
symbolOop element = oopFactory::new_symbol(signature->as_C_string() + index, CHECK_(T_BYTE));
BasicType element_type = FieldType::basic_type(element);
if (element_type == T_OBJECT) {
char* object_type = element->as_C_string();
object_type[element->utf8_length() - 1] = '\0';
*object_key = oopFactory::new_symbol(object_type + 1, CHECK_(T_BYTE));
}
// Pass dimension back to caller
*dimension = dim;
return element_type;
}
BasicType FieldType::basic_type(symbolOop signature) {
return char2type(signature->byte_at(0));
}
// Testing
static bool is_array(symbolOop signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); }