* arith.c (gcd): Allow zeros. Don't issue "non-integral"

exception if MPI fails.
(floorf, ceili): Map integer argument to itself.
(tang, asine, acosi): New functions.

* eval.c (eval_init): New intrinsics: tan, asin, acos.

* lib.h (tang, asine, acosi): Declared.

* txr.1: Documented gcd, abs, floor, ceil, sin, cos, tan
asin, acos, atan, log, and exp.

* txr.vim: Highlighting for tang, asine, acosi.

1 files changed, 3 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index 4a028ca4..3fdee26f 100644
--- a/eval.c
+++ b/eval.c
@@ -2191,6 +2191,9 @@ void eval_init(void)
   reg_fun(intern(lit("ceil"), user_package), func_n1(ceili));
   reg_fun(intern(lit("sin"), user_package), func_n1(sine));
   reg_fun(intern(lit("cos"), user_package), func_n1(cosi));
+  reg_fun(intern(lit("tan"), user_package), func_n1(tang));
+  reg_fun(intern(lit("asin"), user_package), func_n1(asine));
+  reg_fun(intern(lit("acos"), user_package), func_n1(acosi));
   reg_fun(intern(lit("atan"), user_package), func_n1(atang));
   reg_fun(intern(lit("log"), user_package), func_n1(loga));
   reg_fun(intern(lit("exp"), user_package), func_n1(expo));