Hello,
I am trying to make a program in visual c/c++ for configuring a specific
vendor modem via http(s). For this purpose, I am trying and testing with
v8, I need to take some variable values at runtime and use them in the next
POST or GET, but no luck with v8.
There are several javascript files downloaded from devices, but all of them
even fail to compile.They does not seem to have any error from from an
editor, are not modifiable because every time it is retrieved from modem.
There are not problems configuring modems from popular browsers, chrome
included; they don't find errors.
e.g. It is a file md5.js downloaded from modem(in attach)
I begin from hello_world sample modified a little with shell example:
adding ReportException function in order to take more information from
compile fails:
*G:\c++\projects\v8hello\x64\Debug>v8helloundefined:260: SyntaxError:
Unexpected token >> 8 * ((i+1)%4)) & 0xFF) << 8 )^SyntaxError: Unexpected
token >*
where this is line 249(not 260): (((binarray[i+1 >> 2] *>>* 8 * ((i+1)%4))
& 0xFF) << 8 )
, and I cannot find any error there, brackets seem ok etc. The bitwise
shift right is the problem, but why ? There bitwise shift right & left
before this statement, but they do not take attention of the compiler.
the source is:
*// Copyright 2015 the V8 project authors. All rights reserved.// Use of
this source code is governed by a BSD-style license that can be// found in
the LICENSE file.#include <stdio.h>#include <stdlib.h>#include
<string.h>#include <io.h>#include <fcntl.h>#include
<libplatform/libplatform.h>#include <v8.h>void ReportException(v8::Isolate*
isolate, v8::TryCatch* handler);const char* ToCString(const
v8::String::Utf8Value& value) { return *value ? *value : "<string
conversion failed>";}void ReportException(v8::Isolate* isolate,
v8::TryCatch* try_catch) { v8::HandleScope handle_scope(isolate);
v8::String::Utf8Value exception(isolate, try_catch->Exception()); const
char* exception_string = ToCString(exception); v8::Local<v8::Message>
message = try_catch->Message(); if (message.IsEmpty()) { // V8
didn't provide any extra information about this error; just // print
the exception. fprintf(stderr, "%s\n", exception_string); }
else { // Print (filename):(line number): (message).
v8::String::Utf8Value filename(isolate,
message->GetScriptOrigin().ResourceName()); v8::Local<v8::Context>
context(isolate->GetCurrentContext()); const char* filename_string =
ToCString(filename); int linenum =
message->GetLineNumber(context).FromJust(); fprintf(stderr, "%s:%i:
%s\n", filename_string, linenum, exception_string); // Print line of
source code. v8::String::Utf8Value sourceline( isolate,
message->GetSourceLine(context).ToLocalChecked()); const char*
sourceline_string = ToCString(sourceline); fprintf(stderr, "%s\n",
sourceline_string); // Print wavy underline (GetUnderline is
deprecated). int start =
message->GetStartColumn(context).FromJust(); for (int i = 0; i <
start; i++) { fprintf(stderr, " "); } int end =
message->GetEndColumn(context).FromJust(); for (int i = start; i <
end; i++) { fprintf(stderr, "^"); }
fprintf(stderr, "\n"); v8::Local<v8::Value> stack_trace_string;
if (try_catch->StackTrace(context).ToLocal(&stack_trace_string) &&
stack_trace_string->IsString() &&
v8::Local<v8::String>::Cast(stack_trace_string)->Length() > 0) {
v8::String::Utf8Value stack_trace(isolate, stack_trace_string);
const char* stack_trace_string = ToCString(stack_trace);
fprintf(stderr, "%s\n", stack_trace_string); } }}int main(int
argc, char* argv[]) { // Initialize V8.
v8::V8::InitializeICUDefaultLocation(argv[0]);
v8::V8::InitializeExternalStartupData(argv[0]);
std::unique_ptr<v8::Platform> platform =
v8::platform::NewDefaultPlatform();
v8::V8::InitializePlatform(platform.get()); v8::V8::Initialize(); //
Create a new Isolate and make it the current one.
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator =
v8::ArrayBuffer::Allocator::NewDefaultAllocator(); v8::Isolate* isolate =
v8::Isolate::New(create_params); { v8::Isolate::Scope
isolate_scope(isolate); // Create a stack-allocated handle scope.
v8::HandleScope handle_scope(isolate); v8::TryCatch
try_catch(isolate); // Create a new context. v8::Local<v8::Context>
context = v8::Context::New(isolate); // Enter the context for compiling
and running the hello world script. v8::Context::Scope
context_scope(context); { // Create a string containing the
JavaScript source code. int fd = open("G:\\md5.js", _O_RDWR,
_S_IREAD); char bfx[200001]; int nr = read(fd, bfx,
200000); close(fd); v8::Local<v8::String> source =
v8::String::NewFromUtf8(isolate, bfx,
v8::NewStringType::kNormal) .ToLocalChecked(); // Compile
the source code. /* v8::Local<v8::Script> script =
v8::Script::Compile(context, source).ToLocalChecked();*/
v8::Local<v8::Script> script; if (!v8::Script::Compile(context,
source).ToLocal(&script)) { ReportException(isolate,
&try_catch); return -1; } // Run the script to get the
result. v8::Local<v8::Value> result =
script->Run(context).ToLocalChecked(); // Convert the result to an
UTF8 string and print it. v8::String::Utf8Value utf8(isolate,
result); printf("%s\n", *utf8); } } // Dispose the isolate and
tear down V8. isolate->Dispose(); v8::V8::Dispose();
v8::V8::ShutdownPlatform(); delete create_params.array_buffer_allocator;
return 0;}*
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