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

fpdfsdk/src/fsdk_baseannot.cpp

Index: fpdfsdk/src/fsdk_baseannot.cpp
diff --git a/fpdfsdk/src/fsdk_baseannot.cpp b/fpdfsdk/src/fsdk_baseannot.cpp
index c6731e6f568542e926a243e52b6257d16239a277..d0151fbeb264164f2c92f3f95796236f70f7f58c 100644
--- a/fpdfsdk/src/fsdk_baseannot.cpp
+++ b/fpdfsdk/src/fsdk_baseannot.cpp
@@ -4,6 +4,7 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "../../core/include/fxcrt/fx_ext.h"
 #include "../include/fsdk_define.h"
 #include "../include/fsdk_mgr.h"
 #include "../include/fsdk_baseannot.h"
@@ -219,12 +220,9 @@ 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;
 
@@ -232,9 +230,9 @@ 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++;
     }
@@ -246,9 +244,9 @@ 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++;
     }
@@ -260,9 +258,9 @@ 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++;
     }
@@ -274,9 +272,9 @@ 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++;
     }
@@ -288,9 +286,9 @@ 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++;
     }
@@ -302,9 +300,9 @@ 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++;
     }
@@ -323,9 +321,9 @@ 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++;
     }
@@ -340,9 +338,9 @@ 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++;
     }