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| -rw-r--r-- | libavutil/common.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavutil/common.h b/libavutil/common.h index 9f0f998682..b1203ad5a2 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -295,6 +295,11 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x) * input, this could be *ptr++. * @param ERROR Expression to be evaluated on invalid input, * typically a goto statement. + * + * @warning ERROR should not contain a loop control statement which + * could interact with the internal while loop, and should force an + * exit from the macro code (e.g. through a goto or a return) in order + * to prevent undefined results. */ #define GET_UTF8(val, GET_BYTE, ERROR)\ val= GET_BYTE;\ |