void declare()
{
/* - declare a library function -- NOT optional.
- declare an external function -- NOT optional.
- declare a forward reference to a SUB.
- declare an instance of a structure.
*/
char funcname[MAXIDSIZE],ut_funcname[MAXIDSIZE];
char libname[MAXIDSIZE],ut_libname[MAXIDSIZE];
char extfuncname[MAXIDSIZE+1];
int oldlevel,cc;
int functype=undefined;
SYM *declared_func;
BOOL found;
/* all functions and structures must be declared at level ZERO */
oldlevel=lev;
lev=ZERO;
insymbol();
if (sym == subsym) { lev=oldlevel; forward_ref(); return; }
if (sym == structsym) { lev=oldlevel; declare_structure(); return; }
if (sym != functionsym) _error(47);
else
{
insymbol();
/* type identifiers */
functype = sym_to_opt_type();
if (sym != ident) _error(7);
else {
/* get the function's name */
strcpy(funcname,id);
strcpy(ut_funcname,ut_id); /* case sensitive version for search! */
remove_qualifier(funcname);
remove_qualifier(ut_funcname);
if (functype == undefined) functype = typ;
/* get the LIBRARY symbol and/or parameter list */
insymbol();
/* parse parameter list? */
if (sym == lparen)
{
do
{
insymbol();
if (sym == rparen && lastsym == lparen) break; /* FuncName() */
/* type indentifier? */
if (sym == shortintsym || sym == longintsym || sym == addresssym ||
sym == singlesym || sym == stringsym)
insymbol();
/* parameter */
if (sym != ident) _error(7);
else insymbol();
} while (sym == comma);
if (sym != rparen) _error(9);
else insymbol();
}
/* EXTERNAL or LIBRARY function? */
if (sym == externalsym) {
if (ut_funcname[0] != '_')
{
strcpy(extfuncname,"_\0");
strcat(extfuncname,ut_funcname);
}
else
strcpy(extfuncname,ut_funcname);
enter(extfuncname,functype,extfunc,0);
enter_XREF(extfuncname);
insymbol();
}
else
if (sym != librarysym) _error(48);
else
{
enter(funcname,functype,function,0); /* enter into symbol table */
declared_func=curr_item;
insymbol();
if (sym != ident && sym != stringconst)
{
/*
** Search all bmap files found in acelib and otherlib arrays
** for function since no library was specified.
*/
found=FALSE;
/* acelib array */
cc=0;
while (!found && acelib[cc].name[0] != '\0' &&
strcmp(acelib[cc].name,"SENTINEL") != 0)
{
found = found_func(acelib[cc].name,ut_funcname,declared_func);
cc++;
}
if (found) { lev=oldlevel; return; }
/* otherlib array */
cc=0;
while (!found && otherlib[cc].name[0] != '\0' &&
strcmp(otherlib[cc].name,"SENTINEL") != 0)
{
found = found_func(otherlib[cc].name,ut_funcname,declared_func);
cc++;
}
if (!found) _error(49);
}
else
{
/*
** Search specified library (bmap file) for the declared function.
*/
get_libname(libname,ut_libname); /* without extension! */
if (!found_func(libname,ut_funcname,declared_func))
_error(49);
insymbol();
}
}
}
}
lev=oldlevel;
}
VoidExtFunc getFunctionByName(const char* name)
{
VoidExtFunc found_func(NULL);
return glXGetProcAddressARB((const GLubyte*)name);
}
