Cleanup some numeric code.

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=thestig@chromium.org

Review URL: https://codereview.chromium.org/1415933005 .

3 files changed, 12 insertions, 12 deletions

diff --git a/fpdfsdk/src/fsdk_baseannot.cpp b/fpdfsdk/src/fsdk_baseannot.cpp
index c6731e6f56..ebf56ad293 100644
--- a/fpdfsdk/src/fsdk_baseannot.cpp
+++ b/fpdfsdk/src/fsdk_baseannot.cpp
@@ -221,7 +221,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
     FX_CHAR ch;
     while (i < strLength) {
       ch = dtStr[i];
-      if (ch >= '0' && ch <= '9')
+      if (std::isdigit(ch))
         break;
       i++;
     }
@@ -234,7 +234,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -248,7 +248,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -262,7 +262,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -276,7 +276,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -290,7 +290,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -304,7 +304,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -325,7 +325,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       j++;
-      if (ch < '0' || ch > '9')
+      if (!std::isdigit(ch))
         break;
       i++;
     }
@@ -342,7 +342,7 @@ CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
       ch = dtStr[i];
       k = k * 10 + ch - '0';
       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 e898214cd8..13239aeb1d 100644
--- a/fpdfsdk/src/javascript/PublicMethods.cpp
+++ b/fpdfsdk/src/javascript/PublicMethods.cpp
@@ -116,7 +116,7 @@ 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) {
diff --git a/fpdfsdk/src/javascript/util.cpp b/fpdfsdk/src/javascript/util.cpp
index 14e15c1b6f..cf10bbd7b4 100644
--- a/fpdfsdk/src/javascript/util.cpp
+++ b/fpdfsdk/src/javascript/util.cpp
@@ -425,7 +425,7 @@ 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 +450,7 @@ 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;