Merge to XFA: Reland "Cleanup some numeric code.""

This reverts commit 0569ab0b11b723d9bca4ddd642b0cf8828c4bdd1.

This changes the various comparisons of char >= '0' && char <= '9' and
char < '0' || char > '9' to use std::isdigit checks. It also cleans up
a handful of hex to digit conversions to call one common method.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1449873003 .

(cherry picked from commit 3f148915d12f54a946a0c0bf526162b79c39d650)

Review URL: https://codereview.chromium.org/1452673002 .

3 files changed, 28 insertions, 28 deletions

diff --git a/fpdfsdk/src/fsdk_baseannot.cpp b/fpdfsdk/src/fsdk_baseannot.cpp
index 090a50fe62..8b083e3bea 100644
--- a/fpdfsdk/src/fsdk_baseannot.cpp
+++ b/fpdfsdk/src/fsdk_baseannot.cpp
@@ -4,7 +4,8 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "../include/fpdfxfa/fpdfxfa_doc.h"
+#include "core/include/fxcrt/fx_ext.h"
+#include "fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h"
 #include "fpdfsdk/include/fsdk_baseannot.h"
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
@@ -217,12 +218,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     int i = 0;
     int j, k;
     FX_CHAR ch;
-    while (i < strLength) {
-      ch = dtStr[i];
-      if (ch >= '0' && ch <= '9')
-        break;
-      i++;
-    }
+    while (i < strLength && !std::isdigit(dtStr[i]))
+      ++i;
+
     if (i >= strLength)
       return *this;
 
@@ -230,9 +228,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 4) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -244,9 +242,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -258,9 +256,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -272,9 +270,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -286,9 +284,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -300,9 +298,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -321,9 +319,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -338,9 +336,9 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     k = 0;
     while (i < strLength && j < 2) {
       ch = dtStr[i];
-      k = k * 10 + ch - '0';
+      k = k * 10 + FXSYS_toDecimalDigit(ch);
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
diff --git a/fpdfsdk/src/javascript/PublicMethods.cpp b/fpdfsdk/src/javascript/PublicMethods.cpp
index 454085069e..75327dd631 100644
--- a/fpdfsdk/src/javascript/PublicMethods.cpp
+++ b/fpdfsdk/src/javascript/PublicMethods.cpp
@@ -14,6 +14,7 @@
 #include "JS_Runtime.h"
 #include "JS_Value.h"
 #include "color.h"
+#include "core/include/fxcrt/fx_ext.h"
 #include "fpdfsdk/include/fsdk_mgr.h"  // For CPDFDoc_Environment.
 #include "fpdfsdk/include/javascript/IJavaScript.h"
 #include "resource.h"
@@ -108,7 +109,7 @@ FX_BOOL CJS_PublicMethods::IsDigit(wchar_t ch) {
 }
 
 FX_BOOL CJS_PublicMethods::IsDigit(char ch) {
-  return (ch >= '0' && ch <= '9');
+  return std::isdigit(ch);
 }
 
 FX_BOOL CJS_PublicMethods::IsAlphabetic(wchar_t ch) {
@@ -388,7 +389,7 @@ int CJS_PublicMethods::ParseStringInteger(const CFX_WideString& string,
 
     FX_WCHAR c = string.GetAt(i);
     if (IsDigit((wchar_t)c)) {
-      nRet = nRet * 10 + (c - '0');
+      nRet = nRet * 10 + FXSYS_toDecimalDigitWide(c);
       nSkip = i - nStart + 1;
       if (nSkip >= nMaxStep)
         break;
diff --git a/fpdfsdk/src/javascript/util.cpp b/fpdfsdk/src/javascript/util.cpp
index c021ec9e95..30df53ea72 100644
--- a/fpdfsdk/src/javascript/util.cpp
+++ b/fpdfsdk/src/javascript/util.cpp
@@ -13,6 +13,7 @@
 #include "JS_Runtime.h"
 #include "JS_Value.h"
 #include "PublicMethods.h"
+#include "core/include/fxcrt/fx_ext.h"
 #include "fpdfsdk/include/javascript/IJavaScript.h"
 #include "resource.h"
 
@@ -425,7 +426,7 @@ void util::printx(const std::string& cFormat,
         break;
       case 'X': {
         while (itSource < iSize) {
-          if ((cSource[itSource] >= '0' && cSource[itSource] <= '9') ||
+          if (std::isdigit(cSource[itSource]) ||
               (cSource[itSource] >= 'a' && cSource[itSource] <= 'z') ||
               (cSource[itSource] >= 'A' && cSource[itSource] <= 'Z')) {
             cPurpose += cSource[itSource];
@@ -450,7 +451,7 @@ void util::printx(const std::string& cFormat,
       } break;
       case '9': {
         while (itSource < iSize) {
-          if (cSource[itSource] >= '0' && cSource[itSource] <= '9') {
+          if (std::isdigit(cSource[itSource])) {
             cPurpose += cSource[itSource];
             itSource++;
             break;
@@ -531,7 +532,7 @@ int64_t FX_atoi64(const char* nptr) {
   total = 0;
 
   while (isdigit(c)) {
-    total = 10 * total + (c - '0');  /* accumulate digit */
+    total = 10 * total + FXSYS_toDecimalDigit(c); /* accumulate digit */
     c = (int)(unsigned char)*nptr++; /* get next char */
   }