From fc52398d2110b8e2d87eaa82487ecfc04b3e92b8 Mon Sep 17 00:00:00 2001 From: yangguo Date: Mon, 24 Nov 2014 08:22:56 -0800 Subject: [PATCH] Remove lineprocessor sample. This sample used to demonstrate the usage of the DebuggerAgent. The latter has been removed, so this sample has no point anymore. R=ulan@chromium.org Review URL: https://codereview.chromium.org/754043002 Cr-Commit-Position: refs/heads/master@{#25488} --- samples/lineprocessor.cc | 385 ----------------------------------------------- samples/samples.gyp | 6 - 2 files changed, 391 deletions(-) delete mode 100644 samples/lineprocessor.cc diff --git a/samples/lineprocessor.cc b/samples/lineprocessor.cc deleted file mode 100644 index 69bfab4..0000000 --- a/samples/lineprocessor.cc +++ /dev/null @@ -1,385 +0,0 @@ -// Copyright 2012 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#include - -#include -#include - -#include -#include -#include -#include - -/** - * This sample program should demonstrate certain aspects of debugging - * standalone V8-based application. - * - * The program reads input stream, processes it line by line and print - * the result to output. The actual processing is done by custom JavaScript - * script. The script is specified with command line parameters. - * - * The main cycle of the program will sequentially read lines from standard - * input, process them and print to standard output until input closes. - * There are 2 possible configuration in regard to main cycle. - * - * 1. The main cycle is on C++ side. Program should be run with - * --main-cycle-in-cpp option. Script must declare a function named - * "ProcessLine". The main cycle in C++ reads lines and calls this function - * for processing every time. This is a sample script: - -function ProcessLine(input_line) { - return ">>>" + input_line + "<<<"; -} - - * - * 2. The main cycle is in JavaScript. Program should be run with - * --main-cycle-in-js option. Script gets run one time at all and gets - * API of 2 global functions: "read_line" and "print". It should read input - * and print converted lines to output itself. This a sample script: - -while (true) { - var line = read_line(); - if (!line) { - break; - } - var res = line + " | " + line; - print(res); -} - */ - -enum MainCycleType { - CycleInCpp, - CycleInJs -}; - -const char* ToCString(const v8::String::Utf8Value& value); -void ReportException(v8::Isolate* isolate, v8::TryCatch* handler); -v8::Handle ReadFile(v8::Isolate* isolate, const char* name); -v8::Handle ReadLine(); - -void Print(const v8::FunctionCallbackInfo& args); -void ReadLine(const v8::FunctionCallbackInfo& args); -bool RunCppCycle(v8::Handle script, - v8::Local context, - bool report_exceptions); - - -v8::Persistent debug_message_context; - -int RunMain(int argc, char* argv[]) { - v8::V8::SetFlagsFromCommandLine(&argc, argv, true); - v8::Isolate* isolate = v8::Isolate::New(); - v8::Isolate::Scope isolate_scope(isolate); - v8::HandleScope handle_scope(isolate); - - v8::Handle script_source; - v8::Handle script_name; - int script_param_counter = 0; - - MainCycleType cycle_type = CycleInCpp; - - for (int i = 1; i < argc; i++) { - const char* str = argv[i]; - if (strcmp(str, "-f") == 0) { - // Ignore any -f flags for compatibility with the other stand- - // alone JavaScript engines. - continue; - } else if (strcmp(str, "--main-cycle-in-cpp") == 0) { - cycle_type = CycleInCpp; - } else if (strcmp(str, "--main-cycle-in-js") == 0) { - cycle_type = CycleInJs; - } else if (strncmp(str, "--", 2) == 0) { - printf("Warning: unknown flag %s.\nTry --help for options\n", str); - } else if (strcmp(str, "-e") == 0 && i + 1 < argc) { - script_source = v8::String::NewFromUtf8(isolate, argv[i + 1]); - script_name = v8::String::NewFromUtf8(isolate, "unnamed"); - i++; - script_param_counter++; - } else { - // Use argument as a name of file to load. - script_source = ReadFile(isolate, str); - script_name = v8::String::NewFromUtf8(isolate, str); - if (script_source.IsEmpty()) { - printf("Error reading '%s'\n", str); - return 1; - } - script_param_counter++; - } - } - - if (script_param_counter == 0) { - printf("Script is not specified\n"); - return 1; - } - if (script_param_counter != 1) { - printf("Only one script may be specified\n"); - return 1; - } - - // Create a template for the global object. - v8::Handle global = v8::ObjectTemplate::New(isolate); - - // Bind the global 'print' function to the C++ Print callback. - global->Set(v8::String::NewFromUtf8(isolate, "print"), - v8::FunctionTemplate::New(isolate, Print)); - - if (cycle_type == CycleInJs) { - // Bind the global 'read_line' function to the C++ Print callback. - global->Set(v8::String::NewFromUtf8(isolate, "read_line"), - v8::FunctionTemplate::New(isolate, ReadLine)); - } - - // Create a new execution environment containing the built-in - // functions - v8::Handle context = v8::Context::New(isolate, NULL, global); - // Enter the newly created execution environment. - v8::Context::Scope context_scope(context); - - debug_message_context.Reset(isolate, context); - - bool report_exceptions = true; - - v8::Handle script; - { - // Compile script in try/catch context. - v8::TryCatch try_catch; - v8::ScriptOrigin origin(script_name); - script = v8::Script::Compile(script_source, &origin); - if (script.IsEmpty()) { - // Print errors that happened during compilation. - if (report_exceptions) - ReportException(isolate, &try_catch); - return 1; - } - } - - { - v8::TryCatch try_catch; - - script->Run(); - if (try_catch.HasCaught()) { - if (report_exceptions) - ReportException(isolate, &try_catch); - return 1; - } - } - - if (cycle_type == CycleInCpp) { - bool res = RunCppCycle(script, - isolate->GetCurrentContext(), - report_exceptions); - return !res; - } else { - // All is already done. - } - return 0; -} - - -bool RunCppCycle(v8::Handle script, - v8::Local context, - bool report_exceptions) { - v8::Isolate* isolate = context->GetIsolate(); - - v8::Handle fun_name = - v8::String::NewFromUtf8(isolate, "ProcessLine"); - v8::Handle process_val = context->Global()->Get(fun_name); - - // If there is no Process function, or if it is not a function, - // bail out - if (!process_val->IsFunction()) { - printf("Error: Script does not declare 'ProcessLine' global function.\n"); - return 1; - } - - // It is a function; cast it to a Function - v8::Handle process_fun = - v8::Handle::Cast(process_val); - - - while (!feof(stdin)) { - v8::HandleScope handle_scope(isolate); - - v8::Handle input_line = ReadLine(); - if (input_line == v8::Undefined(isolate)) { - continue; - } - - const int argc = 1; - v8::Handle argv[argc] = { input_line }; - - v8::Handle result; - { - v8::TryCatch try_catch; - result = process_fun->Call(isolate->GetCurrentContext()->Global(), - argc, argv); - if (try_catch.HasCaught()) { - if (report_exceptions) - ReportException(isolate, &try_catch); - return false; - } - } - v8::String::Utf8Value str(result); - const char* cstr = ToCString(str); - printf("%s\n", cstr); - } - - return true; -} - - -int main(int argc, char* argv[]) { - v8::V8::InitializeICU(); - v8::Platform* platform = v8::platform::CreateDefaultPlatform(); - v8::V8::InitializePlatform(platform); - v8::V8::Initialize(); - int result = RunMain(argc, argv); - v8::V8::Dispose(); - v8::V8::ShutdownPlatform(); - delete platform; - return result; -} - - -// Extracts a C string from a V8 Utf8Value. -const char* ToCString(const v8::String::Utf8Value& value) { - return *value ? *value : ""; -} - - -// Reads a file into a v8 string. -v8::Handle ReadFile(v8::Isolate* isolate, const char* name) { - FILE* file = fopen(name, "rb"); - if (file == NULL) return v8::Handle(); - - fseek(file, 0, SEEK_END); - int size = ftell(file); - rewind(file); - - char* chars = new char[size + 1]; - chars[size] = '\0'; - for (int i = 0; i < size;) { - int read = static_cast(fread(&chars[i], 1, size - i, file)); - i += read; - } - fclose(file); - v8::Handle result = - v8::String::NewFromUtf8(isolate, chars, v8::String::kNormalString, size); - delete[] chars; - return result; -} - - -void ReportException(v8::Isolate* isolate, v8::TryCatch* try_catch) { - v8::HandleScope handle_scope(isolate); - v8::String::Utf8Value exception(try_catch->Exception()); - const char* exception_string = ToCString(exception); - v8::Handle message = try_catch->Message(); - if (message.IsEmpty()) { - // V8 didn't provide any extra information about this error; just - // print the exception. - printf("%s\n", exception_string); - } else { - // Print (filename):(line number): (message). - v8::String::Utf8Value filename(message->GetScriptOrigin().ResourceName()); - const char* filename_string = ToCString(filename); - int linenum = message->GetLineNumber(); - printf("%s:%i: %s\n", filename_string, linenum, exception_string); - // Print line of source code. - v8::String::Utf8Value sourceline(message->GetSourceLine()); - const char* sourceline_string = ToCString(sourceline); - printf("%s\n", sourceline_string); - // Print wavy underline (GetUnderline is deprecated). - int start = message->GetStartColumn(); - for (int i = 0; i < start; i++) { - printf(" "); - } - int end = message->GetEndColumn(); - for (int i = start; i < end; i++) { - printf("^"); - } - printf("\n"); - } -} - - -// The callback that is invoked by v8 whenever the JavaScript 'print' -// function is called. Prints its arguments on stdout separated by -// spaces and ending with a newline. -void Print(const v8::FunctionCallbackInfo& args) { - bool first = true; - for (int i = 0; i < args.Length(); i++) { - v8::HandleScope handle_scope(args.GetIsolate()); - if (first) { - first = false; - } else { - printf(" "); - } - v8::String::Utf8Value str(args[i]); - const char* cstr = ToCString(str); - printf("%s", cstr); - } - printf("\n"); - fflush(stdout); -} - - -// The callback that is invoked by v8 whenever the JavaScript 'read_line' -// function is called. Reads a string from standard input and returns. -void ReadLine(const v8::FunctionCallbackInfo& args) { - if (args.Length() > 0) { - args.GetIsolate()->ThrowException( - v8::String::NewFromUtf8(args.GetIsolate(), "Unexpected arguments")); - return; - } - args.GetReturnValue().Set(ReadLine()); -} - - -v8::Handle ReadLine() { - const int kBufferSize = 1024 + 1; - char buffer[kBufferSize]; - - char* res; - { - res = fgets(buffer, kBufferSize, stdin); - } - v8::Isolate* isolate = v8::Isolate::GetCurrent(); - if (res == NULL) { - v8::Handle t = v8::Undefined(isolate); - return v8::Handle::Cast(t); - } - // Remove newline char - for (char* pos = buffer; *pos != '\0'; pos++) { - if (*pos == '\n') { - *pos = '\0'; - break; - } - } - return v8::String::NewFromUtf8(isolate, buffer); -} diff --git a/samples/samples.gyp b/samples/samples.gyp index 0c4c705..31e96f4 100644 --- a/samples/samples.gyp +++ b/samples/samples.gyp @@ -67,11 +67,5 @@ 'process.cc', ], }, - { - 'target_name': 'lineprocessor', - 'sources': [ - 'lineprocessor.cc', - ], - } ], } -- 2.7.4