71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* identifier.c
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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#include "xt.h"
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Generic_Predicate (Identifier)
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static int Identifier_Equal (Object x, Object y) {
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register struct S_Identifier *p = IDENTIFIER(x), *q = IDENTIFIER(y);
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return p->type == q->type && p->val == q->val && !p->free && !q->free;
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}
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Generic_Print (Identifier, "#[identifier %lu]",
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(unsigned int)(uintptr_t)POINTER(x))
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Object Make_Id (int type, XtPointer val, int num) {
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Object i;
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i = Find_Object (T_Identifier, (GENERIC)0, Match_Xt_Obj, type, val);
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if (Nullp (i)) {
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i = Alloc_Object (sizeof (struct S_Identifier), T_Identifier, 0);
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IDENTIFIER(i)->tag = Null;
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IDENTIFIER(i)->type = type;
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IDENTIFIER(i)->val = val;
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IDENTIFIER(i)->num = num;
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IDENTIFIER(i)->free = 0;
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Register_Object (i, (GENERIC)0, (PFO)0, 0);
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}
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return i;
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}
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XtPointer Use_Id (Object x, int type) {
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Check_Type (x, T_Identifier);
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if (IDENTIFIER(x)->type != type || IDENTIFIER(x)->free)
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Primitive_Error ("invalid identifier");
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IDENTIFIER(x)->free = 1;
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Deregister_Object (x);
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return IDENTIFIER(x)->val;
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}
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void elk_init_xt_identifier () {
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Generic_Define (Identifier, "identifier", "identifier?");
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}
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