I have a function that works with variable arguments and looks like this:
static int getIntValue(const int min,const int max,va_list *vl)
{
int listValue;
listValue=va_arg(*vl,int);
if (listValue<min) listValue=min;
else if (listValue>max) listValue=max;
return listValue;
}
unsigned long init_if_list(int *var,va_list vl)
{
char *listTag;
listTag=va_arg(vl,char*);
if (!strcmp(listTag,INIT_SHOWUI)) initValues.uiFlags=getIntValue(INT_MIN,INT_MAX,&vl);
This code compiles well with Windows/VisualStudio 2012 and "older" GCC versions (like 4.7 on CentOS 6). But it fails when I try to compile it with GCC 4.8.4 / Ubuntu. Here I get following error:
error: cannot convert '__va_list_tag**' to '__va_list_tag (*)[1]' for argument '3' to 'int getIntValue(int, int, __va_list_tag (*)[1])'
if (!strcmp(listTag,INIT_SHOWUI)) initValues.uiFlags=getIntValue(INT_MIN,INT_MAX,&vl);
Anybody an idea what is wrong here? Why does GCC complain?
Thanks!
Always pass va_list
by value, never by pointer.
Therefore:
static int getIntValue(const int min, const int max, va_list vl)
and
initValues.uiFlags=getIntValue(INT_MIN, INT_MAX, vl);