Allow compiling PDFium without V8.

samples/pdfium_test.cc

 // Copyright (c) 2010 The Chromium 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 <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <list>
 #include <sstream>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "../public/fpdf_dataavail.h"
 #include "../public/fpdf_ext.h"
 #include "../public/fpdf_formfill.h"
 #include "../public/fpdf_text.h"
 #include "../public/fpdfview.h"
 #include "image_diff_png.h"
+#ifdef PDF_ENABLE_V8
 #include "v8/include/libplatform/libplatform.h"
 #include "v8/include/v8.h"
+#endif
 
 #ifdef _WIN32
 #define snprintf _snprintf
 #define PATH_SEPARATOR '\\'
 #else
 #define PATH_SEPARATOR '/'
 #endif
 
 enum OutputFormat {
   OUTPUT_NONE,
@@ skipping 38 matching lines @@
   (void)fclose(file);
   if (bytes_read != file_length) {
     fprintf(stderr, "Failed to read: %s\n", filename);
     free(buffer);
     return nullptr;
   }
   *retlen = bytes_read;
   return buffer;
 }
 
+#ifdef PDF_ENABLE_V8
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 // Returns the full path for an external V8 data file based on either
 // the currect exectuable path or an explicit override.
 static std::string GetFullPathForSnapshotFile(const Options& options,
                                               const std::string& filename) {
   std::string result;
   if (!options.bin_directory.empty()) {
     result = options.bin_directory;
     if (*options.bin_directory.rbegin() != PATH_SEPARATOR) {
       result += PATH_SEPARATOR;
@@ skipping 17 matching lines @@
   size_t data_length = 0;
   char* data_buffer = GetFileContents(full_path.c_str(), &data_length);
   if (!data_buffer) {
     return false;
   }
   result_data->data = const_cast<const char*>(data_buffer);
   result_data->raw_size = static_cast<int>(data_length);
   return true;
 }
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
+#endif  // PDF_ENABLE_V8
 
 static bool CheckDimensions(int stride, int width, int height) {
   if (stride < 0 || width < 0 || height < 0)
     return false;
   if (height > 0 && width > INT_MAX / height)
     return false;
   return true;
 }
 
 static void WritePpm(const char* pdf_name, int num, const void* buffer_void,
@@ skipping 237 matching lines @@
       options->output_format = OUTPUT_EMF;
     }
     else if (cur_arg == "--bmp") {
       if (options->output_format != OUTPUT_NONE) {
         fprintf(stderr, "Duplicate or conflicting --bmp argument\n");
         return false;
       }
       options->output_format = OUTPUT_BMP;
     }
 #endif  // _WIN32
+#ifdef PDF_ENABLE_V8
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
     else if (cur_arg.size() > 10 && cur_arg.compare(0, 10, "--bin-dir=") == 0) {
       if (!options->bin_directory.empty()) {
         fprintf(stderr, "Duplicate --bin-dir argument\n");
         return false;
       }
       options->bin_directory = cur_arg.substr(10);
     }
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
+#endif  // PDF_ENABLE_V8
     else if (cur_arg.size() > 8 && cur_arg.compare(0, 8, "--scale=") == 0) {
       if (!options->scale_factor_as_string.empty()) {
         fprintf(stderr, "Duplicate --scale argument\n");
         return false;
       }
       options->scale_factor_as_string = cur_arg.substr(8);
     }
     else
       break;
   }
@@ skipping 193 matching lines @@
 
 int main(int argc, const char* argv[]) {
   std::vector<std::string> args(argv, argv + argc);
   Options options;
   std::list<std::string> files;
   if (!ParseCommandLine(args, &options, &files)) {
     fprintf(stderr, "%s", usage_string);
     return 1;
   }
 
+#ifdef PDF_ENABLE_V8
   v8::V8::InitializeICU();
   v8::Platform* platform = v8::platform::CreateDefaultPlatform();
   v8::V8::InitializePlatform(platform);
   v8::V8::Initialize();
 
   // By enabling predictable mode, V8 won't post any background tasks.
   static const char predictable_flag[] = "--predictable";
   v8::V8::SetFlagsFromString(predictable_flag,
                              static_cast<int>(strlen(predictable_flag)));
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   v8::StartupData natives;
   v8::StartupData snapshot;
   if (!GetExternalData(options, "natives_blob.bin", &natives) ||
       !GetExternalData(options, "snapshot_blob.bin", &snapshot)) {
     return 1;
   }
   v8::V8::SetNativesDataBlob(&natives);
   v8::V8::SetSnapshotDataBlob(&snapshot);
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
+#endif  // PDF_ENABLE_V8
 
   FPDF_LIBRARY_CONFIG config;
   config.version = 2;
   config.m_pUserFontPaths = nullptr;
   config.m_pIsolate = nullptr;
   config.m_v8EmbedderSlot = 0;
 
   const char* path_array[2];
   if (!options.font_directory.empty()) {
     path_array[0] = options.font_directory.c_str();
@@ skipping 14 matching lines @@
     files.pop_front();
     size_t file_length = 0;
     char* file_contents = GetFileContents(filename.c_str(), &file_length);
     if (!file_contents)
       continue;
     RenderPdf(filename, file_contents, file_length, options);
     free(file_contents);
   }
 
   FPDF_DestroyLibrary();
+#ifdef PDF_ENABLE_V8
   v8::V8::ShutdownPlatform();
   delete platform;
+#endif  // PDF_ENABLE_V8
 
   return 0;
 }