From a0b117b9481a1a3091a6d0c1fe0deacf17e20529 Mon Sep 17 00:00:00 2001
From: John Emmas <johne53@tiscali.co.uk>
Date: Fri, 19 Aug 2016 10:19:32 +0100
Subject: [PATCH] 'roundf()' wasn't introduced in MSVC until VS2013 - so for
 the time being, let's emulate it using 'floorf()'

---
 libs/pbd/msvc/msvc_pbd.cc                 | 18 ++++++++++++++++++
 libs/pbd/pbd/msvc_pbd.h                   |  1 +
 msvc_extra_headers/ardourext/misc.h.input |  1 +
 3 files changed, 20 insertions(+)

diff --git a/libs/pbd/msvc/msvc_pbd.cc b/libs/pbd/msvc/msvc_pbd.cc
index f49ac5393c..68596e3463 100644
--- a/libs/pbd/msvc/msvc_pbd.cc
+++ b/libs/pbd/msvc/msvc_pbd.cc
@@ -223,6 +223,24 @@ ssize_t ret;
 	return (ret);
 }
 
+//***************************************************************
+//
+//	roundf()
+//
+// Emulates roundf() using floorf().
+//
+//	Returns:
+//
+//    On Success: The largest integer that is less than or
+//                equal to 'x'.
+//    On Failure: None
+//
+LIBPBD_API float PBD_APICALLTYPE
+roundf(float x)
+{
+	return (floorf(x));
+}
+
 //***************************************************************
 //
 //	round()
diff --git a/libs/pbd/pbd/msvc_pbd.h b/libs/pbd/pbd/msvc_pbd.h
index 5a6b550242..1a017fcb8a 100644
--- a/libs/pbd/pbd/msvc_pbd.h
+++ b/libs/pbd/pbd/msvc_pbd.h
@@ -230,6 +230,7 @@ LIBPBD_API int				__cdecl         gettimeofday(struct timeval *__restrict tv, __
 LIBPBD_API ssize_t			PBD_APICALLTYPE pread(int handle, void *buf, size_t nbytes, off_t offset);
 LIBPBD_API ssize_t			PBD_APICALLTYPE pwrite(int handle, const void *buf, size_t nbytes, off_t offset);
 LIBPBD_API int				PBD_APICALLTYPE poll(struct pollfd *fds, nfds_t nfds, int timeout);
+LIBPBD_API float			PBD_APICALLTYPE roundf(float x);
 LIBPBD_API double			PBD_APICALLTYPE round(double x);
 LIBPBD_API double			PBD_APICALLTYPE trunc(double x);
 
diff --git a/msvc_extra_headers/ardourext/misc.h.input b/msvc_extra_headers/ardourext/misc.h.input
index 11ba638494..6b6533b510 100644
--- a/msvc_extra_headers/ardourext/misc.h.input
+++ b/msvc_extra_headers/ardourext/misc.h.input
@@ -253,6 +253,7 @@ inline int64_t abs(int64_t val) throw()
 
 #if !defined(LIBPBD_API) || defined(PBD_IS_IN_WIN_STATIC_LIB)
 extern  double round(double x);
+extern  float roundf(float x);
 
 // Emulate some C99 math functions which MSVC itself didn't
 // implement until later in life.