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/**
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <v8.h>
#include <string.h>
#include "logging.h"
#include "util.h"
// Extracts a C string from a V8 Utf8Value.
const char* ToCString(const v8::String::Utf8Value& value) {
return *value ? *value : "<string conversion failed>";
}
// Extracts a C string from a V8 AsciiValue.
const char* ToCString(const v8::String::AsciiValue& value) {
return *value ? *value : "<string conversion failed>";
}
// Extracts a C string from a v8::Value
const char* ToCString(v8::Handle<v8::Value> value) {
v8::String::AsciiValue strAsciiValue(value);
return ToCString(strAsciiValue);
}
// Report an exception
void LogErrorMessage(v8::Handle<v8::Message> message,
const char *alternate_message) {
v8::HandleScope handle_scope;
if (message.IsEmpty()) {
// V8 didn't provide any extra information about this error; just
// print the exception.
if (alternate_message == NULL || strlen(alternate_message) == 0) {
LOGD("LogErrorMessage no message");
} else {
LOGD("LogErrorMessage no message: %s", alternate_message);
}
} else {
v8::String::Utf8Value filename(message->GetScriptResourceName());
const char* filename_string = ToCString(filename);
int linenum = message->GetLineNumber();
LOGD("file:%s line:%i", filename_string, linenum);
// Print line of source code.
v8::String::Utf8Value sourceline(message->GetSourceLine());
const char* sourceline_string = ToCString(sourceline);
LOGD("%s", sourceline_string);
// Print location information under source line
int start = message->GetStartColumn();
int end = message->GetEndColumn();
int lenErr = end - start;
int size = end + 1;
if (lenErr == 0) {
lenErr += 1;
size += 1;
}
char *error_string = new char[size];
memset(error_string, ' ', start);
memset(&error_string[start], '^', lenErr);
error_string[size-1] = 0;
LOGD("%s", error_string);
LOGD("%s", ToCString(v8::String::Utf8Value(message->Get())));
delete [] error_string;
}
}
// Report an exception
void ReportException(v8::TryCatch* try_catch) {
v8::HandleScope handle_scope;
v8::String::Utf8Value exception(try_catch->Exception());
v8::Handle<v8::Message> msg = try_catch->Message();
if (msg.IsEmpty()) {
// Why is try_catch->Message empty?
// it is always empty on compile errors
}
LogErrorMessage(msg, ToCString(exception));
}
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