Make pdfium_test report build options.

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>
@@ skipping 24 matching lines @@
   OUTPUT_NONE,
   OUTPUT_PPM,
   OUTPUT_PNG,
 #ifdef _WIN32
   OUTPUT_BMP,
   OUTPUT_EMF,
 #endif
 };
 
 struct Options {
-  Options() : output_format(OUTPUT_NONE) { }
+  Options() : show_config(false), output_format(OUTPUT_NONE) {}
 
+  bool show_config;
   OutputFormat output_format;
   std::string scale_factor_as_string;
   std::string exe_path;
   std::string bin_directory;
   std::string font_directory;
 };
 
 static bool CheckDimensions(int stride, int width, int height) {
   if (stride < 0 || width < 0 || height < 0)
     return false;
@@ skipping 194 matching lines @@
 
 bool ParseCommandLine(const std::vector<std::string>& args,
                       Options* options, std::list<std::string>* files) {
   if (args.empty()) {
     return false;
   }
   options->exe_path = args[0];
   size_t cur_idx = 1;
   for (; cur_idx < args.size(); ++cur_idx) {
     const std::string& cur_arg = args[cur_idx];
-    if (cur_arg == "--ppm") {
+    if (cur_arg == "--show-config") {
+      options->show_config = true;
+    } else if (cur_arg == "--ppm") {
       if (options->output_format != OUTPUT_NONE) {
         fprintf(stderr, "Duplicate or conflicting --ppm argument\n");
         return false;
       }
       options->output_format = OUTPUT_PPM;
     } else if (cur_arg == "--png") {
       if (options->output_format != OUTPUT_NONE) {
         fprintf(stderr, "Duplicate or conflicting --png argument\n");
         return false;
       }
@@ skipping 32 matching lines @@
       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
+    } else if (cur_arg.size() >= 2 && cur_arg[0] == '-' && cur_arg[1] == '-') {
+      fprintf(stderr, "Unrecognized argument %s\n", cur_arg.c_str());
+      return false;
+    } else
       break;
   }
-  if (cur_idx >= args.size()) {
-    fprintf(stderr, "No input files.\n");
-    return false;
-  }
   for (size_t i = cur_idx; i < args.size(); i++) {
     files->push_back(args[i]);
   }
   return true;
 }
 
 FPDF_BOOL Is_Data_Avail(FX_FILEAVAIL* pThis, size_t offset, size_t size) {
   return true;
 }
 
@@ skipping 193 matching lines @@
 
   FORM_DoDocumentAAction(form, FPDFDOC_AACTION_WC);
   FPDFDOC_ExitFormFillEnvironment(form);
   FPDF_CloseDocument(doc);
   FPDFAvail_Destroy(pdf_avail);
 
   fprintf(stderr, "Rendered %d pages.\n", rendered_pages);
   fprintf(stderr, "Skipped %d bad pages.\n", bad_pages);
 }
 
+static void ShowConfig() {
+  std::string comma;
+  std::string config;
+#if PDF_ENABLE_V8
+  config.append(comma);

[Tom Sepez, 2016/01/15 17:29:50]

not strictly required, but allows adding/shuffling these blocks in any order.

[Tom Sepez, 2016/01/15 17:35:36]

... and its gone.

+  config.append("V8");
+  comma = ",";
+#endif  // PDF_ENABLE_V8
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+  config.append(comma);
+  config.append("V8_EXTERNAL");
+  comma = ",";
+#endif  // V8_USE_EXTERNAL_STARTUP_DATA
+  printf("%s\n", config.c_str());
+}
+
 static const char usage_string[] =
     "Usage: pdfium_test [OPTION] [FILE]...\n"
+    "  --show-config     - print build options and exit\n"
     "  --bin-dir=<path>  - override path to v8 external data\n"
     "  --font-dir=<path> - override path to external fonts\n"
     "  --scale=<number>  - scale output size by number (e.g. 0.5)\n"
 #ifdef _WIN32
     "  --bmp - write page images <pdf-name>.<page-number>.bmp\n"
     "  --emf - write page meta files <pdf-name>.<page-number>.emf\n"
 #endif
     "  --png - write page images <pdf-name>.<page-number>.png\n"
     "  --ppm - write page images <pdf-name>.<page-number>.ppm\n";
 
 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;
   }
 
+  if (options.show_config) {
+    ShowConfig();
+    return 0;
+  }
+
+  if (files.empty()) {
+    fprintf(stderr, "No input files.\n");
+    return 1;
+  }
+
 #ifdef PDF_ENABLE_V8
   v8::Platform* platform;
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   v8::StartupData natives;
   v8::StartupData snapshot;
   InitializeV8ForPDFium(options.exe_path, options.bin_directory, &natives,
                         &snapshot, &platform);
 #else   // V8_USE_EXTERNAL_STARTUP_DATA
   InitializeV8ForPDFium(&platform);
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
@@ skipping 31 matching lines @@
   }
 
   FPDF_DestroyLibrary();
 #ifdef PDF_ENABLE_V8
   v8::V8::ShutdownPlatform();
   delete platform;
 #endif  // PDF_ENABLE_V8
 
   return 0;
 }