Revert "Revert "Revert "Cleanup some numeric code."""

This reverts commit e0e922db5fb77df9a5a9cc802096f484ed21da1c.

Broke Windows build.

FAILED: ninja -t msvc -e environment.x86 -- "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64_x86\cl.exe" /nologo /showIncludes /FC @obj\core\src\fxcrt\fxcrt.fx_basic_gcc.obj.rsp /c ..\..\core\src\fxcrt\fx_basic_gcc.cpp /Foobj\core\src\fxcrt\fxcrt.fx_basic_gcc.obj /Fdobj\fxcrt.cc.pdb
e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_gcc.cpp(28) : error C2220: warning treated as error - no 'object' file generated
        e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_gcc.cpp(75) : see reference to function template instantiation 'T FXSYS_StrToInt<int32_t,const FX_WCHAR*>(STR_T)' being compiled
        with
        [
            T=int32_t
,            STR_T=const FX_WCHAR *
        ]
e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_gcc.cpp(28) : warning C4244: 'argument' : conversion from 'const FX_WCHAR' to 'char', possible loss of data
FAILED: ninja -t msvc -e environment.x86 -- "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64_x86\cl.exe" /nologo /showIncludes /FC @obj\core\src\fpdftext\fpdftext.fpdf_text.obj.rsp /c ..\..\core\src\fpdftext\fpdf_text.cpp /Foobj\core\src\fpdftext\fpdftext.fpdf_text.obj /Fdobj\fpdftext.cc.pdb
e:\b\build\slave\windows\build\pdfium\core\src\fpdftext\fpdf_text.cpp(439) : error C2039: 'isdigit' : is not a member of 'std'
FAILED: ninja -t msvc -e environment.x86 -- "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64_x86\cl.exe" /nologo /showIncludes /FC @obj\core\src\fxcrt\fxcrt.fx_basic_wstring.obj.rsp /c ..\..\core\src\fxcrt\fx_basic_wstring.cpp /Foobj\core\src\fxcrt\fxcrt.fx_basic_wstring.obj /Fdobj\fxcrt.cc.pdb
e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_wstring.cpp(973) : error C2220: warning treated as error - no 'object' file generated
e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_wstring.cpp(973) : warning C4244: 'argument' : conversion from 'const FX_WCHAR' to 'char', possible loss of data
e:\b\build\slave\windows\build\pdfium\core\src\fxcrt\fx_basic_wstring.cpp(981) : warning C4244: 'argument' : conversion from 'const FX_WCHAR' to 'char', possible loss of data
FAILED: ninja -t msvc -e environment.x86 -- "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64_x86\cl.exe" /nologo /showIncludes /FC @obj\core\src\fpdftext\fpdftext.fpdf_text_int.obj.rsp /c ..\..\core\src\fpdftext\fpdf_text_int.cpp /Foobj\core\src\fpdftext\fpdftext.fpdf_text_int.obj /Fdobj\fpdftext.cc.pdb
e:\b\build\slave\windows\build\pdfium\core\src\fpdftext\fpdf_text_int.cpp(2436) : error C2039: 'isdigit' : is not a member of 'std'
e:\b\build\slave\windows\build\pdfium\core\src\fpdftext\fpdf_text_int.cpp(2440) : error C2039: 'isdigit' : is not a member of 'std'
ninja: build stopped: subcommand failed.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1431683008 .

1 files changed, 9 insertions, 7 deletions

diff --git a/core/src/fxcrt/fx_basic_gcc.cpp b/core/src/fxcrt/fx_basic_gcc.cpp
index 250079913c..6f17482156 100644
--- a/core/src/fxcrt/fx_basic_gcc.cpp
+++ b/core/src/fxcrt/fx_basic_gcc.cpp
@@ -5,7 +5,6 @@
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include <limits>
-#include <cctype>
 
 #include "../../include/fxcrt/fx_ext.h"
 #include "../../include/fxcrt/fx_string.h"
@@ -13,19 +12,22 @@
 template <class T, class STR_T>
 T FXSYS_StrToInt(STR_T str) {
   FX_BOOL neg = FALSE;
-  if (!str)
+  if (str == NULL) {
     return 0;
-
+  }
   if (*str == '-') {
     neg = TRUE;
     str++;
   }
   T num = 0;
-  while (*str && std::isdigit(*str)) {
-    if (num > (std::numeric_limits<T>::max() - 9) / 10)
+  while (*str) {
+    if ((*str) < '0' || (*str) > '9') {
       break;
-
-    num = num * 10 + FXSYS_toDecimalDigit(*str);
+    }
+    if (num > (std::numeric_limits<T>::max() - 9) / 10) {
+      break;
+    }
+    num = num * 10 + (*str) - '0';
     str++;
   }
   return neg ? -num : num;