From 060ddfa60ce3379cd1d9785559e57449ae25f333 Mon Sep 17 00:00:00 2001
From: Torsten Sommer <torsten.sommer@3ds.com>
Date: Mon, 7 Oct 2024 13:31:23 +0200
Subject: [PATCH] Add fmiAbs() and fmiMax()

---
 CMakeLists.txt     |  4 ----
 src/cosimulation.c | 13 ++++++++++---
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 35ebcd03..6db01f90 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -198,10 +198,6 @@ set_target_properties(${TARGET_NAME} PROPERTIES
 set_target_properties(${TARGET_NAME} PROPERTIES PREFIX "")
 set_target_properties(${TARGET_NAME} PROPERTIES OUTPUT_NAME ${MODEL_NAME})
 
-if (UNIX)
-    target_link_libraries(${TARGET_NAME} m)
-endif ()
-
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/lib)
 
 # modelDescription.xml
diff --git a/src/cosimulation.c b/src/cosimulation.c
index 66703227..5d1f7d71 100644
--- a/src/cosimulation.c
+++ b/src/cosimulation.c
@@ -1,6 +1,5 @@
 #include <stdlib.h>  // for calloc(), free()
 #include <float.h>   // for DBL_EPSILON
-#include <math.h>    // for fabs()
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
@@ -192,17 +191,25 @@ Status reset(ModelInstance* comp) {
 
 #define EPSILON (1.0e-5)
 
+static bool fmiAbs(double v) {
+    return v >= 0 ? v : -v;
+}
+
+static bool fmiMax(double a, double b) {
+    return (a < b) ? b : a;
+}
+
 bool isClose(double a, double b) {
 
     if (!isfinite(a) || !isfinite(b)) {
         return false;
     }
 
-    if (fabs(a - b) <= EPSILON) {
+    if (fmiAbs(a - b) <= EPSILON) {
         return true;
     }
 
-    return fabs(a - b) <= EPSILON * fmax(fabs(a), fabs(b));
+    return fmiAbs(a - b) <= EPSILON * fmiMax(fmiAbs(a), fmiAbs(b));
 }
 
 bool invalidNumber(ModelInstance *comp, const char *f, const char *arg, size_t actual, size_t expected) {