From 5012fb0e3642839c6855b67982621f875340c7e0 Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Sat, 1 Dec 2018 13:25:00 -0800
Subject: [PATCH] Add 'round' function to builtin math

---
 src/tinyexpr.c | 1 +
 tests/math.err | 3 +++
 tests/math.in  | 4 ++++
 tests/math.out | 9 +++++++++
 4 files changed, 17 insertions(+)

diff --git a/src/tinyexpr.c b/src/tinyexpr.c
index a2ef44a77..f53a5d574 100755
--- a/src/tinyexpr.c
+++ b/src/tinyexpr.c
@@ -150,6 +150,7 @@ static const te_variable functions[] = {
     {"npr", npr,      TE_FUNCTION2 | TE_FLAG_PURE, 0},
     {"pi", pi,        TE_FUNCTION0 | TE_FLAG_PURE, 0},
     {"pow", pow,      TE_FUNCTION2 | TE_FLAG_PURE, 0},
+    {"round", round,  TE_FUNCTION1 | TE_FLAG_PURE, 0},
     {"sin", sin,      TE_FUNCTION1 | TE_FLAG_PURE, 0},
     {"sinh", sinh,    TE_FUNCTION1 | TE_FLAG_PURE, 0},
     {"sqrt", sqrt,    TE_FUNCTION1 | TE_FLAG_PURE, 0},
diff --git a/tests/math.err b/tests/math.err
index 2a42d8ebc..6d4dcc1ca 100644
--- a/tests/math.err
+++ b/tests/math.err
@@ -2,6 +2,9 @@
 ####################
 # Validate basic expressions
 
+####################
+# Validate some rounding functions
+
 ####################
 # Validate some integral computations
 
diff --git a/tests/math.in b/tests/math.in
index aaf515d39..48c0afd44 100644
--- a/tests/math.in
+++ b/tests/math.in
@@ -15,6 +15,10 @@ math 5 \* -2
 math -- -4 / 2
 math -- '-4 * 2'
 
+logmsg Validate some rounding functions
+math 'round(3/2)' ; math 'floor(3/2)' ; math 'ceil(3/2)'
+math 'round(-3/2)' ; math 'floor(-3/2)' ; math 'ceil(-3/2)'
+
 logmsg Validate some integral computations
 math 1
 math 10
diff --git a/tests/math.out b/tests/math.out
index 4cafd7a30..1f385b54c 100644
--- a/tests/math.out
+++ b/tests/math.out
@@ -17,6 +17,15 @@
 -2
 -8
 
+####################
+# Validate some rounding functions
+2
+1
+2
+-2
+-2
+-1
+
 ####################
 # Validate some integral computations
 1