Fix a bunch of sign mismatch warnings.

core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp

 // Copyright 2014 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.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_resource.h"
 #include "../../../include/fxge/fx_freetype.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "../fpdf_cmaps/cmap_int.h"
 #include "font_int.h"
 
 CPDF_CMapManager::CPDF_CMapManager() {
   m_bPrompted = FALSE;
   FXSYS_memset(m_CID2UnicodeMaps, 0, sizeof m_CID2UnicodeMaps);
 }
 CPDF_CMapManager::~CPDF_CMapManager() {
   for (const auto& pair : m_CMaps) {
     delete pair.second;
   }
   m_CMaps.clear();
-  for (int i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
+  for (size_t i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
     delete m_CID2UnicodeMaps[i];
   }
 }
 CPDF_CMap* CPDF_CMapManager::GetPredefinedCMap(const CFX_ByteString& name,
                                                FX_BOOL bPromptCJK) {
   auto it = m_CMaps.find(name);
   if (it != m_CMaps.end()) {
     return it->second;
   }
   CPDF_CMap* pCMap = LoadPredefinedCMap(name, bPromptCJK);
@@ skipping 21 matching lines @@
     if (Ordering == CFX_ByteStringC(g_CharsetNames[charset]))
       return charset;
   }
   return CIDSET_UNKNOWN;
 }
 void CPDF_CMapManager::ReloadAll() {
   for (const auto& pair : m_CMaps) {
     CPDF_CMap* pCMap = pair.second;
     pCMap->LoadPredefined(this, pair.first, FALSE);
   }
-  for (int i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
+  for (size_t i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
     if (CPDF_CID2UnicodeMap* pMap = m_CID2UnicodeMaps[i]) {
       pMap->Load(this, i, FALSE);
     }
   }
 }
-CPDF_CID2UnicodeMap* CPDF_CMapManager::GetCID2UnicodeMap(int charset,
+CPDF_CID2UnicodeMap* CPDF_CMapManager::GetCID2UnicodeMap(size_t charset,
                                                          FX_BOOL bPromptCJK) {
-  if (m_CID2UnicodeMaps[charset] == NULL) {
+  if (!m_CID2UnicodeMaps[charset])
     m_CID2UnicodeMaps[charset] = LoadCID2UnicodeMap(charset, bPromptCJK);
-  }
   return m_CID2UnicodeMaps[charset];
 }
-CPDF_CID2UnicodeMap* CPDF_CMapManager::LoadCID2UnicodeMap(int charset,
+CPDF_CID2UnicodeMap* CPDF_CMapManager::LoadCID2UnicodeMap(size_t charset,
                                                           FX_BOOL bPromptCJK) {
   CPDF_CID2UnicodeMap* pMap = new CPDF_CID2UnicodeMap();
   if (!pMap->Initialize()) {
     delete pMap;
     return NULL;
   }
   pMap->Load(this, charset, bPromptCJK);
   return pMap;
 }
 CPDF_CMapParser::CPDF_CMapParser() {
@@ skipping 672 matching lines @@
 }
 FX_WCHAR CPDF_CID2UnicodeMap::UnicodeFromCID(FX_WORD CID) {
   if (m_Charset == CIDSET_UNICODE) {
     return CID;
   }
   if (CID < m_EmbeddedCount) {
     return m_pEmbeddedMap[CID];
   }
   return 0;
 }
-void FPDFAPI_LoadCID2UnicodeMap(int charset,
+void FPDFAPI_LoadCID2UnicodeMap(size_t charset,
                                 const FX_WORD*& pMap,
                                 FX_DWORD& count);
 void CPDF_CID2UnicodeMap::Load(CPDF_CMapManager* pMgr,
-                               int charset,
+                               size_t charset,
                                FX_BOOL bPromptCJK) {
   m_Charset = charset;
   FPDFAPI_LoadCID2UnicodeMap(charset, m_pEmbeddedMap, m_EmbeddedCount);
 }
 #include "ttgsubtable.h"
 CPDF_CIDFont::CPDF_CIDFont() : CPDF_Font(PDFFONT_CIDFONT) {
   m_pCMap = NULL;
   m_pAllocatedCMap = NULL;
   m_pCID2UnicodeMap = NULL;
   m_pAnsiWidths = NULL;
@@ skipping 838 matching lines @@
     if (middlecode > CID) {
       end = middle - 1;
     } else if (middlecode < CID) {
       begin = middle + 1;
     } else {
       return &Japan1_VertCIDs[middle].a;
     }
   }
   return NULL;
 }