X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fsupport%2Flyxlib.h;h=23894ee2ebea1d47d077ca3344ada70edd32e89f;hb=14fa2c71625c715ffcc42d13ee0151333079de2c;hp=287a707e49519750c745c7680e6e83b838d218a5;hpb=f1cba8ff64b369792fd49f5ddf90e8126ab476ac;p=lyx.git

diff --git a/src/support/lyxlib.h b/src/support/lyxlib.h
index 287a707e49..23894ee2eb 100644
--- a/src/support/lyxlib.h
+++ b/src/support/lyxlib.h
@@ -15,6 +15,20 @@
 #ifndef LYX_LIB_H
 #define LYX_LIB_H
 
+// always include <math.h> (also with MSVC), to avoid compiler specific side effects
+#include <math.h>
+
+#ifdef _MSC_VER
+/// Replacement for C99 round()
+inline double round(double x)
+{
+	if (x < 0)
+		return ceil(x - 0.5);
+	else
+		return floor(x + 0.5);
+}
+#endif
+
 namespace lyx {
 namespace support {
 
@@ -34,6 +48,12 @@ inline bool float_equal(double var, double number, double error)
 	return (number - error <= var && var <= number + error);
 }
 
+/// round \p x to nearest integer
+inline int iround(double x)
+{
+	return static_cast<int>(round(x));
+}
+
 } // namespace support
 } // namespace lyx