From 1f12b8f2c611a957f1545eae394b13dabdbd8f82 Mon Sep 17 00:00:00 2001
From: Khaled Hosny <khaledhosny@eglug.org>
Date: Fri, 26 Oct 2018 12:39:42 +0200
Subject: [PATCH] Older MSVC versions seem to lack round()

---
 libpsautohint/src/ac.c    | 8 +++++++-
 libpsautohint/src/basic.h | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/libpsautohint/src/ac.c b/libpsautohint/src/ac.c
index f67ff35ef..4d5f858ce 100644
--- a/libpsautohint/src/ac.c
+++ b/libpsautohint/src/ac.c
@@ -147,9 +147,15 @@ AutoHint(const ACFontInfo* fontinfo, const char* srcbezdata, bool extrahint,
 }
 
 #if defined(_MSC_VER) && _MSC_VER < 1800
+double
+round(double x)
+{
+    return x < 0 ? ceil(x-0.5) : floor(x + 0.5);
+}
+
 float
 roundf(float x)
 {
-    return (float)((x < 0) ? (ceil((x)-0.5)) : (floor((x) + 0.5)));
+    return (float)(x < 0 ? ceil(x-0.5) : floor(x + 0.5));
 }
 #endif
diff --git a/libpsautohint/src/basic.h b/libpsautohint/src/basic.h
index 8cb66e3b2..1440765d8 100644
--- a/libpsautohint/src/basic.h
+++ b/libpsautohint/src/basic.h
@@ -35,6 +35,7 @@ typedef unsigned char bool;
 #endif /* _MSC_VER < 1900 */
 
 #if _MSC_VER < 1800
+double round(double x);
 float roundf(float x);
 #endif /* _MSC_VER < 1800 */
 #endif /* _MSC_VER */