New function, clamp.

* eval.c (eval_init): Register clamp as intrinsic function.

* lib.c (clamp): New function.

* lib.h (clamp): Declared.

* txr.1: Documented.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index ad5194bd..646038a3 100644
--- a/lib.h
+++ b/lib.h
@@ -583,6 +583,7 @@ val max2(val a, val b);
 val min2(val a, val b);
 val maxv(val first, val rest);
 val minv(val first, val rest);
+val clamp(val low, val high, val num);
 val expt(val base, val exp);
 val exptv(val nlist);
 val exptmod(val base, val exp, val mod);