Re: [Tinycc-devel] How to get var and its type by ex ecuted c-string ?‏

[Dmitrij K]

I am sorry too .. =(

Here is a little proc-helper by me:
(but would better if tcc keeps it for stack vars as native)

[CODE=C]
// value of var to string:
void vv2str (TCCState *s, const char *varname, int vt, char *buf, int buf_size) {
 // before call this proc, we have to have knowledges
 // about type of var (ask user or parse known .h/.c file and extract info)
 
 if (s == NULL || varname == NULL || vt < 0 ||
  buf == NULL || buf_size <= 0) return ;
 
 *buf = '\0';

 char* value = tcc_get_symbol (s, varname);
 if (value == NULL) return ;
 
 int t = vt & VT_TYPE;
 int bt = t & VT_BTYPE;
 
 switch ( bt ) {
 
  case VT_BYTE: {
   if (t & VT_ARRAY) { snprintf (buf, buf_size, "%s", value); }
   else { snprintf (buf, buf_size, "%c", *value); }
   break;
  }
 
  case VT_BOOL: {
   snprintf (buf, buf_size, "%d", *value != 0);
   break;
  }
 
  case VT_SHORT: {
   short tv; memcpy (&tv, value, sizeof(tv));
   if (t & VT_UNSIGNED) { snprintf (buf, buf_size, "%u", (unsigned)tv); }
   else { snprintf (buf, buf_size, "%d", tv); }
   break;
  }
 
  case VT_INT: {
   int tv; memcpy (&tv, value, sizeof(tv));
   if (t & VT_UNSIGNED) { snprintf (buf, buf_size, "%u", (unsigned)tv); }
   else { snprintf (buf, buf_size, "%d", tv); }
   break;
  }
 
  case VT_LONG: {
   long int tv; memcpy (&tv, value, sizeof(tv));
   if (t & VT_UNSIGNED) { snprintf (buf, buf_size, "%lu", (unsigned long int)tv); }
   else { snprintf (buf, buf_size, "%ld", (long int)tv); }
   break;
  }
 
  case VT_LLONG: {
   long long int tv; memcpy (&tv, value, sizeof(tv));
   if (t & VT_UNSIGNED) { snprintf (buf, buf_size, "%llu", (unsigned long long int)tv); }
   else { snprintf (buf, buf_size, "%lld", tv); }
   break;
  }
 
  case VT_FLOAT: {
   float tv; memcpy (&tv, value, sizeof(tv));
   snprintf (buf, buf_size, "%f", tv);
   break;
  }
 
  case VT_DOUBLE: {
   double tv; memcpy (&tv, value, sizeof(tv));
   snprintf (buf, buf_size, "%f", tv);
   break;
  }
 
  case VT_LDOUBLE: {
   long double tv; memcpy (&tv, value, sizeof(tv));
   snprintf (buf, buf_size, "%Lf", tv);
   break;
  }
 
  case VT_VOID:
  case VT_PTR:
  case VT_FUNC:
  case VT_STRUCT:
   snprintf (buf, buf_size, "%p", value);
   break;
 
  default: { snprintf (buf, buf_size, "%s", value); break; }
 }
 
 return ;
}

[/CODE]

--
The best regards.

> From: address@hidden
> To: address@hidden
> Subject: Re: [Tinycc-devel] How to get var and its type by executed c-string ?
> Date: Sun, 20 Oct 2013 22:01:31 +0800
> CC: address@hidden
>
> Le dimanche 20 octobre 2013 07:19:14, Dmitrij K a écrit :
>
> >
> > // HERE is I can not to know what is the type of a var (for example is the
> > myint now) // but I need it for sprintf into a buffer (for return the
> > buffer in the cstring mode for other things)
>
> I don't think it's possible. There is type_to_str which converts an internal
> representation of a type to a string but that's a function not exported in
> libtcc.
>
> Sorry,
>
> Thomas