fix(printf): remove float comparison

Add more float test cases

Author: mpaland

printf.c

@@ -363,11 +363,7 @@ static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, d
 
   if (prec == 0U) {
     diff = value - (double)whole;
-    if (diff > 0.5) {
-      // greater than 0.5, round up, e.g. 1.6 -> 2
-      ++whole;
-    }
-    else if ((diff == 0.5) && (whole & 1)) {
+    if ((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) {
       // exactly 0.5 and ODD, then round up
       // 1.5 -> 2, but 2.5 -> 2
       ++whole;

test/test_suite.cpp

@@ -1036,6 +1036,15 @@ TEST_CASE("float", "[]" ) {
   test::sprintf(buffer, "%.0f", 34.1415354);
   REQUIRE(!strcmp(buffer, "34"));
 
+  test::sprintf(buffer, "%.0f", 1.3);
+  REQUIRE(!strcmp(buffer, "1"));
+
+  test::sprintf(buffer, "%.0f", 1.55);
+  REQUIRE(!strcmp(buffer, "2"));
+
+  test::sprintf(buffer, "%.1f", 1.64);
+  REQUIRE(!strcmp(buffer, "1.6"));
+
   test::sprintf(buffer, "%.2f", 42.8952);
   REQUIRE(!strcmp(buffer, "42.90"));
 
@@ -1082,6 +1091,9 @@ TEST_CASE("float", "[]" ) {
   test::sprintf(buffer, "%.0f", 3.5);
   REQUIRE(!strcmp(buffer, "4"));
 
+  test::sprintf(buffer, "%.0f", 4.5);
+  REQUIRE(!strcmp(buffer, "4"));
+
   test::sprintf(buffer, "%.0f", 3.49);
   REQUIRE(!strcmp(buffer, "3"));