Code change to avoid signed/unsigned mismatch warnings

fpdfsdk/fpdfview_embeddertest.cpp

 // Copyright 2015 PDFium 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>
 #include <string>
 
 #include "fpdfsdk/fpdfview_c_api_test.h"
 #include "public/fpdfview.h"
 #include "testing/embedder_test.h"
@@ skipping 70 matching lines @@
   EXPECT_EQ(10u, buffer_size);
   EXPECT_EQ(std::string("N\0e\0x\0t\0\0\0", 10),
             std::string(fixed_buffer, buffer_size));
 
   // Try to retrieve third item with ample buffer. Item is taken
   // from Dests NameTree but has a bad sub-dictionary in named_dests.pdf.
   // in named_dests.pdf).
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), 2, fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 
   // Try to retrieve the forth item with ample buffer. Item is taken
   // from Dests NameTree but has a vale of the wrong type in named_dests.pdf.
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), 3, fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 
   // Try to retrieve fifth item with ample buffer. Item taken from the
   // old-style Dests dictionary object in named_dests.pdf.
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), 4, fixed_buffer, &buffer_size);
   EXPECT_NE(nullptr, dest);
   EXPECT_EQ(30u, buffer_size);
   EXPECT_EQ(std::string("F\0i\0r\0s\0t\0A\0l\0t\0e\0r\0n\0a\0t\0e\0\0\0", 30),
             std::string(fixed_buffer, buffer_size));
 
   // Try to retrieve sixth item with ample buffer. Item istaken from the
   // old-style Dests dictionary object but has a sub-dictionary in
   // named_dests.pdf.
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), 5, fixed_buffer, &buffer_size);
   EXPECT_NE(nullptr, dest);
   EXPECT_EQ(28u, buffer_size);
   EXPECT_EQ(std::string("L\0a\0s\0t\0A\0l\0t\0e\0r\0n\0a\0t\0e\0\0\0", 28),
             std::string(fixed_buffer, buffer_size));
 
   // Try to retrieve non-existent item with ample buffer.
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), 6, fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 
   // Try to underflow/overflow the integer index.
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), std::numeric_limits<int>::max(),
                            fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), std::numeric_limits<int>::min(),
                            fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), -1, fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
-  EXPECT_EQ(sizeof(fixed_buffer), buffer_size);  // unmodified.
+  EXPECT_EQ(sizeof(fixed_buffer),
+            static_cast<size_t>(buffer_size));  // unmodified.
 }
 
 TEST_F(FPDFViewEmbeddertest, NamedDestsByName) {
   EXPECT_TRUE(OpenDocument("named_dests.pdf"));
 
   // Null pointer returns NULL.
   FPDF_DEST dest = FPDF_GetNamedDestByName(document(), nullptr);
   EXPECT_EQ(nullptr, dest);
 
   // Empty string returns NULL.
@@ skipping 85 matching lines @@
 
 // The test should pass when there is no infinite recursion in
 // CPDF_SyntaxParser::GetString().
 TEST_F(FPDFViewEmbeddertest, Hang_355) {
   EXPECT_FALSE(OpenDocument("bug_355.pdf"));
 }
 // The test should pass even when the file has circular references to pages.
 TEST_F(FPDFViewEmbeddertest, Hang_360) {
   EXPECT_FALSE(OpenDocument("bug_360.pdf"));
 }