Add PDFCharIsLineEnding helper

core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.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 <limits.h>
 #include "../../../include/fpdfapi/fpdf_parser.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fxcodec/fx_codec.h"
@@ skipping 62 matching lines @@
   }
   if (zcount * 4 > UINT_MAX - (pos - zcount)) {
     return (FX_DWORD)-1;
   }
   dest_buf = FX_Alloc(uint8_t, zcount * 4 + (pos - zcount));
   int state = 0;
   uint32_t res = 0;
   pos = dest_size = 0;
   while (pos < src_size) {
     uint8_t ch = src_buf[pos++];
-    if (ch == '\n' || ch == '\r' || ch == ' ' || ch == '\t') {
+    if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t')
       continue;
-    }
+
     if (ch == 'z') {
       FXSYS_memset(dest_buf + dest_size, 0, 4);
       state = 0;
       res = 0;
       dest_size += 4;
     } else {
       if (ch < '!' || ch > 'u') {
         break;
       }
       res = res * 85 + ch - 33;
@@ skipping 28 matching lines @@
   FX_DWORD i;
   for (i = 0; i < src_size; i++)
     if (src_buf[i] == '>') {
       break;
     }
   dest_buf = FX_Alloc(uint8_t, i / 2 + 1);
   dest_size = 0;
   FX_BOOL bFirstDigit = TRUE;
   for (i = 0; i < src_size; i++) {
     uint8_t ch = src_buf[i];
-    if (ch == ' ' || ch == '\n' || ch == '\t' || ch == '\r') {
+    if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t')
       continue;
-    }
+
     int digit;
     if (ch <= '9' && ch >= '0') {
       digit = ch - '0';
     } else if (ch <= 'f' && ch >= 'a') {
       digit = ch - 'a' + 10;
     } else if (ch <= 'F' && ch >= 'A') {
       digit = ch - 'A' + 10;
     } else if (ch == '>') {
       i++;
       break;
@@ skipping 426 matching lines @@
                      FX_DWORD src_size,
                      uint8_t*& dest_buf,
                      FX_DWORD& dest_size) {
   CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule();
   if (pEncoders) {
     return pEncoders->GetFlateModule()->FlateOrLZWDecode(
         FALSE, src_buf, src_size, FALSE, 0, 0, 0, 0, 0, dest_buf, dest_size);
   }
   return 0;
 }