Fix compilation when disabling debugger support.

samples/lineprocessor.cc

 // 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.
 //
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 // "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.
 
-
-// This controls whether this sample is compiled with debugger support.
-// You may trace its usages in source text to see what parts of program
-// are responsible for debugging support.
-// Note that V8 itself should be compiled with enabled debugger support
-// to have it all working.
-#define SUPPORT_DEBUGGING
-
 #include <v8.h>
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
 #include <v8-debug.h>
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
 #include <fcntl.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 /**
  * This sample program should demonstrate certain aspects of debugging
  * standalone V8-based application.
  *
@@ skipping 58 matching lines @@
 void ReportException(v8::TryCatch* handler);
 v8::Handle<v8::String> ReadFile(const char* name);
 v8::Handle<v8::String> ReadLine();
 
 v8::Handle<v8::Value> Print(const v8::Arguments& args);
 v8::Handle<v8::Value> ReadLine(const v8::Arguments& args);
 bool RunCppCycle(v8::Handle<v8::Script> script, v8::Local<v8::Context> context,
                  bool report_exceptions);
 
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
 v8::Persistent<v8::Context> debug_message_context;
 
 void DispatchDebugMessages() {
   // We are in some random thread. We should already have v8::Locker acquired
   // (we requested this when registered this callback). We was called
   // because new debug messages arrived; they may have already been processed,
   // but we shouldn't worry about this.
   //
   // All we have to do is to set context and call ProcessDebugMessages.
   //
   // We should decide which V8 context to use here. This is important for
   // "evaluate" command, because it must be executed some context.
   // In our sample we have only one context, so there is nothing really to
   // think about.
   v8::Context::Scope scope(debug_message_context);
 
   v8::Debug::ProcessDebugMessages();
 }
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 int RunMain(int argc, char* argv[]) {
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   v8::HandleScope handle_scope;
 
   v8::Handle<v8::String> script_source(NULL);
   v8::Handle<v8::Value> script_name(NULL);
   int script_param_counter = 0;
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   int port_number = -1;
   bool wait_for_connection = false;
   bool support_callback = false;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   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;
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
     } else if (strcmp(str, "--callback") == 0) {
       support_callback = true;
     } else if (strcmp(str, "--wait-for-connection") == 0) {
       wait_for_connection = true;
     } else if (strcmp(str, "-p") == 0 && i + 1 < argc) {
       port_number = atoi(argv[i + 1]);  // NOLINT
       i++;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
     } 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::New(argv[i + 1]);
       script_name = v8::String::New("unnamed");
       i++;
       script_param_counter++;
     } else {
       // Use argument as a name of file to load.
       script_source = ReadFile(str);
@@ skipping 26 matching lines @@
     global->Set(v8::String::New("read_line"),
                 v8::FunctionTemplate::New(ReadLine));
   }
 
   // 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);
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   debug_message_context = v8::Persistent<v8::Context>::New(context);
 
   v8::Locker locker;
 
   if (support_callback) {
     v8::Debug::SetDebugMessageDispatchHandler(DispatchDebugMessages, true);
   }
 
   if (port_number != -1) {
     v8::Debug::EnableAgent("lineprocessor", port_number, wait_for_connection);
   }
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   bool report_exceptions = true;
 
   v8::Handle<v8::Script> script;
   {
     // Compile script in try/catch context.
     v8::TryCatch try_catch;
     script = v8::Script::Compile(script_source, script_name);
     if (script.IsEmpty()) {
       // Print errors that happened during compilation.
@@ skipping 20 matching lines @@
     return !res;
   } else {
     // All is already done.
   }
   return 0;
 }
 
 
 bool RunCppCycle(v8::Handle<v8::Script> script, v8::Local<v8::Context> context,
                  bool report_exceptions) {
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   v8::Locker lock;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   v8::Handle<v8::String> fun_name = v8::String::New("ProcessLine");
   v8::Handle<v8::Value> process_val =
       v8::Context::GetCurrent()->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;
@@ skipping 132 matching lines @@
   }
   return ReadLine();
 }
 
 v8::Handle<v8::String> ReadLine() {
   const int kBufferSize = 1024 + 1;
   char buffer[kBufferSize];
 
   char* res;
   {
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
     v8::Unlocker unlocker;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
     res = fgets(buffer, kBufferSize, stdin);
   }
   if (res == NULL) {
     v8::Handle<v8::Primitive> t = v8::Undefined();
     return v8::Handle<v8::String>(v8::String::Cast(*t));
   }
   // Remove newline char
   for (char* pos = buffer; *pos != '\0'; pos++) {
     if (*pos == '\n') {
       *pos = '\0';
       break;
     }
   }
   return v8::String::New(buffer);
 }