Improved testing of std.cfg regarding uninitialized variables.

cfg/std.cfg

@@ -1033,7 +1033,7 @@
     </arg>
   </function>
   <!-- size_t fread(void *ptr, size_t size, size_t nobj, FILE *stream); -->
-  <function name="fread">
+  <function name="fread,std::fread">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
@@ -1052,14 +1052,14 @@
     </arg>
   </function>
   <!-- void free(void *block); -->
-  <function name="free">
+  <function name="free,std::free">
     <noreturn>false</noreturn>
     <arg nr="1">
       <not-uninit/>
     </arg>
   </function>
   <!-- FILE *freopen(const char *filename, const char *mode, FILE *stream); -->
-  <function name="freopen">
+  <function name="freopen,std::freopen">
     <noreturn>false</noreturn>
     <arg nr="1">
       <not-uninit/>

test/cfg/std.c

@@ -1296,6 +1296,34 @@ void uninitvar_fputws(void)
     (void)fputws(string,stream);
 }
 
+void uninitvar_fread(void)
+{
+    void *ptr;
+    size_t size;
+    size_t nobj;
+    FILE *stream;
+    // cppcheck-suppress uninitvar
+    (void)fread(ptr,size,nobj,stream);
+}
+
+void uninitvar_free(void)
+{
+    // cppcheck-suppress unassignedVariable
+    void *block;
+    // cppcheck-suppress uninitvar
+    free(block);
+}
+
+void uninitvar_freopen(void)
+{
+    char *filename;
+    char *mode;
+    FILE *stream;
+    // cppcheck-suppress uninitvar
+    FILE * p = freopen(filename,mode,stream);
+    free(p);
+}
+
 void ignoreretrn(void)
 {
     char szNumbers[] = "2001 60c0c0 -1101110100110100100000 0x6fffff";

test/cfg/std.cpp

@@ -818,3 +818,31 @@ void uninitvar_fputws(void)
     // cppcheck-suppress uninitvar
     (void)std::fputws(string,stream);
 }
+
+void uninitvar_fread(void)
+{
+    void *ptr;
+    size_t size;
+    size_t nobj;
+    FILE *stream;
+    // cppcheck-suppress uninitvar
+    (void)std::fread(ptr,size,nobj,stream);
+}
+
+void uninitvar_free(void)
+{
+    // cppcheck-suppress unassignedVariable
+    void *block;
+    // cppcheck-suppress uninitvar
+    std::free(block);
+}
+
+void uninitvar_freopen(void)
+{
+    char *filename;
+    char *mode;
+    FILE *stream;
+    // cppcheck-suppress uninitvar
+    FILE * p = std::freopen(filename,mode,stream);
+    free(p);
+}