Improved testing of std.cfg and added more test cases.

cfg/std.cfg

@@ -1077,7 +1077,7 @@
   <!-- double frexp(double x, int *exp); -->
   <!-- float frexpf(float x, int *exp); -->
   <!-- long double frexpl(long double x, int *exp); -->
-  <function name="frexp,frexpf,frexpl">
+  <function name="frexp,std::frexp,frexpf,frexpl">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
@@ -1090,7 +1090,7 @@
   <!-- double hypot(double x, double y); -->
   <!-- float hypotf(float x, float y); -->
   <!-- long double hypotl(long double x, long double y); -->
-  <function name="hypot,hypotf,hypotl">
+  <function name="hypot,std::hypot,hypotf,hypotl">
     <use-retval/>
     <pure/>
     <noreturn>false</noreturn>

test/cfg/std.c

@@ -1324,6 +1324,39 @@ void uninitvar_freopen(void)
     free(p);
 }
 
+void uninitvar_frexp(void)
+{
+    float f1;
+    int *i1;
+    // cppcheck-suppress uninitvar
+    (void)frexpf(f1,i1);
+
+    double d1;
+    int *i2;
+    // cppcheck-suppress uninitvar
+    (void)frexp(d1,i2);
+
+    long double ld1;
+    int *i3;
+    // cppcheck-suppress uninitvar
+    (void)frexpl(ld1,i3);
+}
+
+void uninitvar_hypot(void)
+{
+    float f1,f2;
+    // cppcheck-suppress uninitvar
+    (void)hypotf(f1,f2);
+
+    double d1,d2;
+    // cppcheck-suppress uninitvar
+    (void)hypot(d1,d2);
+
+    long double ld1,ld2;
+    // cppcheck-suppress uninitvar
+    (void)hypotl(ld1,ld2);
+}
+
 void ignoreretrn(void)
 {
     char szNumbers[] = "2001 60c0c0 -1101110100110100100000 0x6fffff";

test/cfg/std.cpp

@@ -846,3 +846,36 @@ void uninitvar_freopen(void)
     FILE * p = std::freopen(filename,mode,stream);
     free(p);
 }
+
+void uninitvar_frexp(void)
+{
+    float f1;
+    int *i1;
+    // cppcheck-suppress uninitvar
+    (void)std::frexp(f1,i1);
+
+    double d1;
+    int *i2;
+    // cppcheck-suppress uninitvar
+    (void)std::frexp(d1,i2);
+
+    long double ld1;
+    int *i3;
+    // cppcheck-suppress uninitvar
+    (void)std::frexp(ld1,i3);
+}
+
+void uninitvar_hypot(void)
+{
+    float f1,f2;
+    // cppcheck-suppress uninitvar
+    (void)std::hypot(f1,f2);
+
+    double d1,d2;
+    // cppcheck-suppress uninitvar
+    (void)std::hypot(d1,d2);
+
+    long double ld1,ld2;
+    // cppcheck-suppress uninitvar
+    (void)std::hypot(ld1,ld2);
+}