[FFmpeg-devel] [PATCH 1/2] libavutil/eval: introduce UINT64_MAX constant

[Stefano Sabatini <stefasab@gmail.com>]

This might be useful, e.g. when setting the random seed expressed as a
uint64_t.
---
 doc/utils.texi   | 3 +++
 libavutil/eval.c | 1 +
 2 files changed, 4 insertions(+)

diff --git a/doc/utils.texi b/doc/utils.texi
index 0c4f146f4f..ac9b63826e 100644
--- a/doc/utils.texi
+++ b/doc/utils.texi
@@ -1030,6 +1030,9 @@ area of the unit disc, approximately 3.14
 exp(1) (Euler's number), approximately 2.718
 @item PHI
 golden ratio (1+sqrt(5))/2, approximately 1.618
+@item UINT64_MAX
+maximum value expressed as an unsigned integer, corresponds to
+18446744073709551616 ((2^64)-1)
 @end table
 
 Assuming that an expression is considered "true" if it has a non-zero
diff --git a/libavutil/eval.c b/libavutil/eval.c
index dc6b3697bc..93048bff91 100644
--- a/libavutil/eval.c
+++ b/libavutil/eval.c
@@ -100,6 +100,7 @@ static const struct {
     { "PI",  M_PI  },
     { "PHI", M_PHI },
     { "QP2LAMBDA", FF_QP2LAMBDA },
+    { "UINT64_MAX", UINT64_MAX }
 };
 
 double av_strtod(const char *numstr, char **tail)
-- 
2.34.1

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