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don't crash when calling EnumNameXXX on sparse enum (#4982)

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Make an out-of-bounds check for enum values before using them to index the
names array.  For consistency with non-sparse enums an empty string is
returned.

Fixes #4821
This commit is contained in:
Frank Benkstein
2018-10-08 23:37:35 +02:00
committed by Wouter van Oortmerssen
parent a4f9d1bfcc
commit 99fe1dc80f
6 changed files with 19 additions and 0 deletions
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9
tests/test.cpp
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@@ -1285,6 +1285,14 @@ void EnumStringsTest() {
true);
}
void EnumNamesTest() {
TEST_EQ_STR("Red", EnumNameColor(Color_Red));
TEST_EQ_STR("Green", EnumNameColor(Color_Green));
TEST_EQ_STR("Blue", EnumNameColor(Color_Blue));
TEST_EQ_STR("", EnumNameColor(static_cast<Color>(-1)));
TEST_EQ_STR("", EnumNameColor(static_cast<Color>(1000)));
}
void IntegerOutOfRangeTest() {
TestError("table T { F:byte; } root_type T; { F:128 }",
"constant does not fit");
@@ -2058,6 +2066,7 @@ int FlatBufferTests() {
ErrorTest();
ValueTest();
EnumStringsTest();
EnumNamesTest();
IntegerOutOfRangeTest();
IntegerBoundaryTest();
UnicodeTest();