Author: ipo...@chromium.org Date: Fri Apr 17 14:04:34 2009 New Revision: 1741
Modified: branches/bleeding_edge/samples/shell.cc branches/bleeding_edge/src/d8.cc branches/bleeding_edge/src/d8.h Log: Add a "read" extension to the shell programs. This global function reads the contents of a file into a string and returns it. Review URL: http://codereview.chromium.org/67262 Modified: branches/bleeding_edge/samples/shell.cc ============================================================================== --- branches/bleeding_edge/samples/shell.cc (original) +++ branches/bleeding_edge/samples/shell.cc Fri Apr 17 14:04:34 2009 @@ -38,6 +38,7 @@ 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); @@ -52,6 +53,8 @@ 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 @@ -132,6 +135,25 @@ 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; } Modified: branches/bleeding_edge/src/d8.cc ============================================================================== --- branches/bleeding_edge/src/d8.cc (original) +++ branches/bleeding_edge/src/d8.cc Fri Apr 17 14:04:34 2009 @@ -163,6 +163,22 @@ } +Handle<Value> Shell::Read(const Arguments& args) { + if (args.Length() != 1) { + return ThrowException(String::New("Bad parameters")); + } + String::Utf8Value file(args[0]); + if (*file == NULL) { + return ThrowException(String::New("Error loading file")); + } + Handle<String> source = ReadFile(*file); + if (source.IsEmpty()) { + return ThrowException(String::New("Error loading file")); + } + return source; +} + + Handle<Value> Shell::Load(const Arguments& args) { for (int i = 0; i < args.Length(); i++) { HandleScope handle_scope; @@ -381,6 +397,7 @@ HandleScope scope; Handle<ObjectTemplate> global_template = ObjectTemplate::New(); global_template->Set(String::New("print"), FunctionTemplate::New(Print)); + global_template->Set(String::New("read"), FunctionTemplate::New(Read)); global_template->Set(String::New("load"), FunctionTemplate::New(Load)); global_template->Set(String::New("quit"), FunctionTemplate::New(Quit)); global_template->Set(String::New("version"), FunctionTemplate::New(Version)); @@ -555,6 +572,8 @@ Handle<ObjectTemplate> global_template = ObjectTemplate::New(); global_template->Set(String::New("print"), FunctionTemplate::New(Shell::Print)); + global_template->Set(String::New("read"), + FunctionTemplate::New(Shell::Read)); global_template->Set(String::New("load"), FunctionTemplate::New(Shell::Load)); global_template->Set(String::New("yield"), Modified: branches/bleeding_edge/src/d8.h ============================================================================== --- branches/bleeding_edge/src/d8.h (original) +++ branches/bleeding_edge/src/d8.h Fri Apr 17 14:04:34 2009 @@ -139,6 +139,7 @@ static Handle<Value> Yield(const Arguments& args); static Handle<Value> Quit(const Arguments& args); static Handle<Value> Version(const Arguments& args); + static Handle<Value> Read(const Arguments& args); static Handle<Value> Load(const Arguments& args); // The OS object on the global object contains methods for performing // operating system calls: --~--~---------~--~----~------------~-------~--~----~ v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev -~----------~----~----~----~------~----~------~--~---