105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
|
/*
|
|||
|
|
*
|
|||
|
|
* s y m b o l . c -- Symbols management
|
|||
|
|
*
|
|||
|
|
* Copyright <EFBFBD> 1993-1996 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* Permission to use, copy, and/or distribute this software and its
|
|||
|
|
* documentation for any purpose and without fee is hereby granted, provided
|
|||
|
|
* that both the above copyright notice and this permission notice appear in
|
|||
|
|
* all copies and derived works. Fees for distribution or use of this
|
|||
|
|
* software or derived works may only be charged with express written
|
|||
|
|
* permission of the copyright holder.
|
|||
|
|
* This software is provided ``as is'' without express or implied warranty.
|
|||
|
|
*
|
|||
|
|
* This software is a derivative work of other copyrighted softwares; the
|
|||
|
|
* copyright notices of these softwares are placed in the file COPYRIGHTS
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* Author: Erick Gallesio [eg@kaolin.unice.fr]
|
|||
|
|
* Creation date: 20-Nov-1993 12:12
|
|||
|
|
* Last file update: 3-Jun-1996 21:35
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#include "stk.h"
|
|||
|
|
|
|||
|
|
static Tcl_HashTable obarray;
|
|||
|
|
|
|||
|
|
void STk_initialize_symbol_table(void)
|
|||
|
|
{
|
|||
|
|
Tcl_InitHashTable(&obarray, TCL_STRING_KEYS);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void STk_mark_symbol_table(void)
|
|||
|
|
{
|
|||
|
|
register SCM x;
|
|||
|
|
Tcl_HashEntry *ent;
|
|||
|
|
Tcl_HashSearch tmp;
|
|||
|
|
|
|||
|
|
for (ent=Tcl_FirstHashEntry(&obarray, &tmp); ent; ent=Tcl_NextHashEntry(&tmp)) {
|
|||
|
|
x = (SCM) Tcl_GetHashValue(ent);
|
|||
|
|
if (VCELL(x) != UNBOUND || (x->cell_info & CELL_INFO_C_VAR)) STk_gc_mark(x);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void STk_free_symbol(SCM symbol)
|
|||
|
|
{
|
|||
|
|
Tcl_DeleteHashEntry(Tcl_FindHashEntry(&obarray, PNAME(symbol)));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
SCM STk_intern(char *name)
|
|||
|
|
{
|
|||
|
|
Tcl_HashEntry *p;
|
|||
|
|
|
|||
|
|
if (p = Tcl_FindHashEntry(&obarray, name))
|
|||
|
|
return Tcl_GetHashValue(p);
|
|||
|
|
else {
|
|||
|
|
SCM sym;
|
|||
|
|
int absent;
|
|||
|
|
|
|||
|
|
/* Be careful with GC: Create hash entry after the new cell to avoid
|
|||
|
|
* partially initialized table entry
|
|||
|
|
*/
|
|||
|
|
NEWCELL(sym, tc_symbol);
|
|||
|
|
p = Tcl_CreateHashEntry(&obarray, name, &absent);
|
|||
|
|
PNAME(sym) = Tcl_GetHashKey(&obarray, p);
|
|||
|
|
VCELL(sym) = UNBOUND;
|
|||
|
|
Tcl_SetHashValue(p, (ClientData) sym);
|
|||
|
|
return sym;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
SCM STk_global_env2list(void)
|
|||
|
|
{
|
|||
|
|
register SCM symbol, res = NIL;
|
|||
|
|
Tcl_HashEntry *ent;
|
|||
|
|
Tcl_HashSearch tmp;
|
|||
|
|
|
|||
|
|
for (ent=Tcl_FirstHashEntry(&obarray, &tmp); ent; ent=Tcl_NextHashEntry(&tmp)) {
|
|||
|
|
symbol = (SCM)Tcl_GetHashValue(ent);
|
|||
|
|
res = Cons(Cons(symbol, VCELL(symbol)), res);
|
|||
|
|
}
|
|||
|
|
return res;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
PRIMITIVE STk_symbolp(SCM x)
|
|||
|
|
{
|
|||
|
|
return SYMBOLP(x) ? Truth : Ntruth;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
PRIMITIVE STk_symbol2string(SCM symbol)
|
|||
|
|
{
|
|||
|
|
if (NSYMBOLP(symbol)) Err("symbol->string: bad symbol", symbol);
|
|||
|
|
return STk_makestring(PNAME(symbol));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
PRIMITIVE STk_string2symbol(SCM string)
|
|||
|
|
{
|
|||
|
|
if (NSTRINGP(string)) Err("string->symbol: bad string", string);
|
|||
|
|
return Intern(CHARS(string));
|
|||
|
|
}
|