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Diffstat (limited to 'V8Binding/v8/samples/shell.cc')
-rw-r--r-- | V8Binding/v8/samples/shell.cc | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/V8Binding/v8/samples/shell.cc b/V8Binding/v8/samples/shell.cc deleted file mode 100644 index 27ed293..0000000 --- a/V8Binding/v8/samples/shell.cc +++ /dev/null @@ -1,303 +0,0 @@ -// Copyright 2009 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 <v8.h> -#include <fcntl.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> - - -void RunShell(v8::Handle<v8::Context> context); -bool ExecuteString(v8::Handle<v8::String> source, - v8::Handle<v8::Value> name, - bool print_result, - bool report_exceptions); -v8::Handle<v8::Value> Print(const v8::Arguments& args); -v8::Handle<v8::Value> Read(const v8::Arguments& args); -v8::Handle<v8::Value> Load(const v8::Arguments& args); -v8::Handle<v8::Value> Quit(const v8::Arguments& args); -v8::Handle<v8::Value> Version(const v8::Arguments& args); -v8::Handle<v8::String> ReadFile(const char* name); -void ReportException(v8::TryCatch* handler); - - -int RunMain(int argc, char* argv[]) { - v8::V8::SetFlagsFromCommandLine(&argc, argv, true); - v8::HandleScope handle_scope; - // Create a template for the global object. - v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New(); - // Bind the global 'print' function to the C++ Print callback. - global->Set(v8::String::New("print"), v8::FunctionTemplate::New(Print)); - // Bind the global 'read' function to the C++ Read callback. - global->Set(v8::String::New("read"), v8::FunctionTemplate::New(Read)); - // Bind the global 'load' function to the C++ Load callback. - global->Set(v8::String::New("load"), v8::FunctionTemplate::New(Load)); - // Bind the 'quit' function - global->Set(v8::String::New("quit"), v8::FunctionTemplate::New(Quit)); - // Bind the 'version' function - global->Set(v8::String::New("version"), v8::FunctionTemplate::New(Version)); - // Create a new execution environment containing the built-in - // functions - v8::Handle<v8::Context> context = v8::Context::New(NULL, global); - // Enter the newly created execution environment. - v8::Context::Scope context_scope(context); - bool run_shell = (argc == 1); - for (int i = 1; i < argc; i++) { - const char* str = argv[i]; - if (strcmp(str, "--shell") == 0) { - run_shell = true; - } else if (strcmp(str, "-f") == 0) { - // Ignore any -f flags for compatibility with the other stand- - // alone JavaScript engines. - continue; - } 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) { - // Execute argument given to -e option directly - v8::HandleScope handle_scope; - v8::Handle<v8::String> file_name = v8::String::New("unnamed"); - v8::Handle<v8::String> source = v8::String::New(argv[i + 1]); - if (!ExecuteString(source, file_name, false, true)) - return 1; - i++; - } else { - // Use all other arguments as names of files to load and run. - v8::HandleScope handle_scope; - v8::Handle<v8::String> file_name = v8::String::New(str); - v8::Handle<v8::String> source = ReadFile(str); - if (source.IsEmpty()) { - printf("Error reading '%s'\n", str); - return 1; - } - if (!ExecuteString(source, file_name, false, true)) - return 1; - } - } - if (run_shell) RunShell(context); - return 0; -} - - -int main(int argc, char* argv[]) { - int result = RunMain(argc, argv); - v8::V8::Dispose(); - return result; -} - - -// Extracts a C string from a V8 Utf8Value. -const char* ToCString(const v8::String::Utf8Value& value) { - return *value ? *value : "<string conversion failed>"; -} - - -// 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. -v8::Handle<v8::Value> Print(const v8::Arguments& args) { - bool first = true; - for (int i = 0; i < args.Length(); i++) { - v8::HandleScope handle_scope; - if (first) { - first = false; - } else { - printf(" "); - } - v8::String::Utf8Value str(args[i]); - const char* cstr = ToCString(str); - printf("%s", cstr); - } - printf("\n"); - fflush(stdout); - return v8::Undefined(); -} - - -// The callback that is invoked by v8 whenever the JavaScript 'read' -// function is called. This function loads the content of the file named in -// the argument into a JavaScript string. -v8::Handle<v8::Value> Read(const v8::Arguments& args) { - if (args.Length() != 1) { - return v8::ThrowException(v8::String::New("Bad parameters")); - } - v8::String::Utf8Value file(args[0]); - if (*file == NULL) { - return v8::ThrowException(v8::String::New("Error loading file")); - } - v8::Handle<v8::String> source = ReadFile(*file); - if (source.IsEmpty()) { - return v8::ThrowException(v8::String::New("Error loading file")); - } - return source; -} - - -// The callback that is invoked by v8 whenever the JavaScript 'load' -// function is called. Loads, compiles and executes its argument -// JavaScript file. -v8::Handle<v8::Value> Load(const v8::Arguments& args) { - for (int i = 0; i < args.Length(); i++) { - v8::HandleScope handle_scope; - v8::String::Utf8Value file(args[i]); - if (*file == NULL) { - return v8::ThrowException(v8::String::New("Error loading file")); - } - v8::Handle<v8::String> source = ReadFile(*file); - if (source.IsEmpty()) { - return v8::ThrowException(v8::String::New("Error loading file")); - } - if (!ExecuteString(source, v8::String::New(*file), false, false)) { - return v8::ThrowException(v8::String::New("Error executing file")); - } - } - return v8::Undefined(); -} - - -// The callback that is invoked by v8 whenever the JavaScript 'quit' -// function is called. Quits. -v8::Handle<v8::Value> Quit(const v8::Arguments& args) { - // If not arguments are given args[0] will yield undefined which - // converts to the integer value 0. - int exit_code = args[0]->Int32Value(); - exit(exit_code); - return v8::Undefined(); -} - - -v8::Handle<v8::Value> Version(const v8::Arguments& args) { - return v8::String::New(v8::V8::GetVersion()); -} - - -// Reads a file into a v8 string. -v8::Handle<v8::String> ReadFile(const char* name) { - FILE* file = fopen(name, "rb"); - if (file == NULL) return v8::Handle<v8::String>(); - - 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 = fread(&chars[i], 1, size - i, file); - i += read; - } - fclose(file); - v8::Handle<v8::String> result = v8::String::New(chars, size); - delete[] chars; - return result; -} - - -// The read-eval-execute loop of the shell. -void RunShell(v8::Handle<v8::Context> context) { - printf("V8 version %s\n", v8::V8::GetVersion()); - static const int kBufferSize = 256; - while (true) { - char buffer[kBufferSize]; - printf("> "); - char* str = fgets(buffer, kBufferSize, stdin); - if (str == NULL) break; - v8::HandleScope handle_scope; - ExecuteString(v8::String::New(str), - v8::String::New("(shell)"), - true, - true); - } - printf("\n"); -} - - -// Executes a string within the current v8 context. -bool ExecuteString(v8::Handle<v8::String> source, - v8::Handle<v8::Value> name, - bool print_result, - bool report_exceptions) { - v8::HandleScope handle_scope; - v8::TryCatch try_catch; - v8::Handle<v8::Script> script = v8::Script::Compile(source, name); - if (script.IsEmpty()) { - // Print errors that happened during compilation. - if (report_exceptions) - ReportException(&try_catch); - return false; - } else { - v8::Handle<v8::Value> result = script->Run(); - if (result.IsEmpty()) { - // Print errors that happened during execution. - if (report_exceptions) - ReportException(&try_catch); - return false; - } else { - if (print_result && !result->IsUndefined()) { - // If all went well and the result wasn't undefined then print - // the returned value. - v8::String::Utf8Value str(result); - const char* cstr = ToCString(str); - printf("%s\n", cstr); - } - return true; - } - } -} - - -void ReportException(v8::TryCatch* try_catch) { - v8::HandleScope handle_scope; - v8::String::Utf8Value exception(try_catch->Exception()); - const char* exception_string = ToCString(exception); - v8::Handle<v8::Message> 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->GetScriptResourceName()); - 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"); - } -} |