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-rw-r--r--fpdfsdk/src/javascript/PublicMethods.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/fpdfsdk/src/javascript/PublicMethods.cpp b/fpdfsdk/src/javascript/PublicMethods.cpp
index 13239aeb1d..e898214cd8 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 std::isdigit(ch);
+ return (ch >= '0' && ch <= '9');
}
FX_BOOL CJS_PublicMethods::IsAlphabetic(wchar_t ch) {