mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-01 12:20:26 +02:00
158 lines
6.7 KiB
C
158 lines
6.7 KiB
C
/* classes: h_files */
|
||
|
||
#ifndef SYMBOLSH
|
||
#define SYMBOLSH
|
||
/* Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2, or (at your option)
|
||
* any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this software; see the file COPYING. If not, write to
|
||
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
||
* Boston, MA 02111-1307 USA
|
||
*
|
||
* As a special exception, the Free Software Foundation gives permission
|
||
* for additional uses of the text contained in its release of GUILE.
|
||
*
|
||
* The exception is that, if you link the GUILE library with other files
|
||
* to produce an executable, this does not by itself cause the
|
||
* resulting executable to be covered by the GNU General Public License.
|
||
* Your use of that executable is in no way restricted on account of
|
||
* linking the GUILE library code into it.
|
||
*
|
||
* This exception does not however invalidate any other reasons why
|
||
* the executable file might be covered by the GNU General Public License.
|
||
*
|
||
* This exception applies only to the code released by the
|
||
* Free Software Foundation under the name GUILE. If you copy
|
||
* code from other Free Software Foundation releases into a copy of
|
||
* GUILE, as the General Public License permits, the exception does
|
||
* not apply to the code that you add in this way. To avoid misleading
|
||
* anyone as to the status of such modified files, you must delete
|
||
* this exception notice from them.
|
||
*
|
||
* If you write modifications of your own for GUILE, it is your choice
|
||
* whether to permit this exception to apply to your modifications.
|
||
* If you do not wish that, delete this exception notice. */
|
||
|
||
/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
|
||
gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
|
||
|
||
|
||
#include "libguile/__scm.h"
|
||
|
||
|
||
extern int scm_symhash_dim;
|
||
|
||
/* SCM_LENGTH(SYM) is the length of SYM's name in characters, and
|
||
SCM_CHARS(SYM) is the address of the first character of SYM's name.
|
||
|
||
Beyond that, there are two kinds of symbols: ssymbols and msymbols,
|
||
distinguished by the 'S' bit in the type.
|
||
|
||
Ssymbols are just uniquified strings. They have a length, chars,
|
||
and that's it. They use the scm_tc7_ssymbol tag (S bit clear).
|
||
|
||
Msymbols are symbols with extra slots. These slots hold a property
|
||
list and a function value (for Emacs Lisp compatibility), and a hash
|
||
code. They use the scm_tc7_msymbol tag.
|
||
|
||
We'd like SCM_CHARS to work on msymbols just as it does on
|
||
ssymbols, so we'll have it point to the symbol's name as usual, and
|
||
store a pointer to the slots just before the name in memory. Thus,
|
||
you have to do some casting and pointer arithmetic to find the
|
||
slots; see the SCM_SLOTS macro.
|
||
|
||
In practice, the slots always live just before the pointer to them.
|
||
So why not ditch the pointer, and use negative indices to refer to
|
||
the slots? That's a good question; ask the author. I think it was
|
||
the cognac. */
|
||
|
||
#define SCM_SYMBOLP(x) (SCM_NIMP (x) \
|
||
&& (SCM_TYP7S (x) == scm_tc7_ssymbol))
|
||
|
||
#define SCM_LENGTH_MAX (0xffffffL)
|
||
#define SCM_LENGTH(x) (((unsigned long) SCM_CELL_WORD_0 (x)) >> 8)
|
||
#define SCM_SETLENGTH(x, v, t) (SCM_SET_CELL_WORD_0 ((x), ((v) << 8) + (t)))
|
||
|
||
#define SCM_CHARS(x) ((char *) (SCM_CELL_WORD_1 (x)))
|
||
#define SCM_UCHARS(x) ((unsigned char *) (SCM_CELL_WORD_1 (x)))
|
||
#define SCM_SETCHARS(x, v) (SCM_SET_CELL_WORD_1 ((x), (scm_bits_t) (v)))
|
||
|
||
#define SCM_SYMBOL_SLOTS 4
|
||
#define SCM_SLOTS(x) ((scm_bits_t *) (* ((scm_bits_t *) SCM_CHARS (x) - 1)))
|
||
#define SCM_SYMBOL_FUNC(X) (SCM_PACK (SCM_SLOTS (X) [0]))
|
||
#define SCM_SET_SYMBOL_FUNC(X, v) (SCM_SLOTS (X) [0] = SCM_UNPACK (v))
|
||
#define SCM_SYMBOL_PROPS(X) (SCM_PACK (SCM_SLOTS (X) [1]))
|
||
#define SCM_SET_SYMBOL_PROPS(X, v) (SCM_SLOTS (X) [1] = SCM_UNPACK (v))
|
||
#define SCM_SYMBOL_HASH(X) (SCM_SLOTS (X) [2])
|
||
|
||
#define SCM_ROSTRINGP(x) (SCM_NIMP(x) && ((SCM_TYP7S(x)==scm_tc7_string) \
|
||
|| (SCM_TYP7S(x) == scm_tc7_ssymbol)))
|
||
#define SCM_ROCHARS(x) ((char *)((SCM_TYP7(x) == scm_tc7_substring) \
|
||
? SCM_INUM (SCM_CADR (x)) + SCM_CHARS (SCM_CDDR (x)) \
|
||
: SCM_CHARS (x)))
|
||
#define SCM_ROUCHARS(x) ((unsigned char *) ((SCM_TYP7(x) == scm_tc7_substring) \
|
||
? SCM_INUM (SCM_CADR (x)) + SCM_UCHARS (SCM_CDDR (x))\
|
||
: SCM_UCHARS (x)))
|
||
#define SCM_ROLENGTH(x) SCM_LENGTH (x)
|
||
#define SCM_SLOPPY_SUBSTRP(x) (SCM_TYP7(x) == scm_tc7_substring)
|
||
#define SCM_SUBSTRP(x) (SCM_NIMP(x) && SCM_SLOPPY_SUBSTRP(x))
|
||
#define SCM_SUBSTR_STR(x) (SCM_CDDR (x))
|
||
#define SCM_SUBSTR_OFFSET(x) (SCM_CADR (x))
|
||
|
||
#define SCM_COERCE_SUBSTR(x) { if (SCM_SUBSTRP (x)) \
|
||
x = scm_makfromstr (SCM_ROCHARS (x), \
|
||
SCM_ROLENGTH (x), 0); }
|
||
|
||
|
||
|
||
extern unsigned long scm_strhash (const unsigned char *str, scm_sizet len, unsigned long n);
|
||
extern SCM scm_sym2vcell (SCM sym, SCM thunk, SCM definep);
|
||
extern SCM scm_sym2ovcell_soft (SCM sym, SCM obarray);
|
||
extern SCM scm_sym2ovcell (SCM sym, SCM obarray);
|
||
extern SCM scm_intern_obarray_soft (const char *name, scm_sizet len, SCM obarray, int softness);
|
||
extern SCM scm_intern_obarray (const char *name, scm_sizet len, SCM obarray);
|
||
extern SCM scm_intern (const char *name, scm_sizet len);
|
||
extern SCM scm_intern0 (const char * name);
|
||
extern SCM scm_sysintern (const char *name, SCM val);
|
||
extern SCM scm_sysintern0 (const char *name);
|
||
extern SCM scm_sysintern0_no_module_lookup (const char *name);
|
||
extern SCM scm_symbol_value0 (const char *name);
|
||
extern SCM scm_symbol_p (SCM x);
|
||
extern SCM scm_symbol_to_string (SCM s);
|
||
extern SCM scm_string_to_symbol (SCM s);
|
||
extern SCM scm_string_to_obarray_symbol (SCM o, SCM s, SCM softp);
|
||
extern SCM scm_intern_symbol (SCM o, SCM s);
|
||
extern SCM scm_unintern_symbol (SCM o, SCM s);
|
||
extern SCM scm_symbol_binding (SCM o, SCM s);
|
||
extern SCM scm_symbol_interned_p (SCM o, SCM s);
|
||
extern SCM scm_symbol_bound_p (SCM o, SCM s);
|
||
extern SCM scm_symbol_set_x (SCM o, SCM s, SCM v);
|
||
extern SCM scm_symbol_fref (SCM s);
|
||
extern SCM scm_symbol_pref (SCM s);
|
||
extern SCM scm_symbol_fset_x (SCM s, SCM val);
|
||
extern SCM scm_symbol_pset_x (SCM s, SCM val);
|
||
extern SCM scm_symbol_hash (SCM s);
|
||
extern SCM scm_builtin_bindings (void);
|
||
extern SCM scm_builtin_weak_bindings (void);
|
||
extern SCM scm_gensym (SCM name, SCM obarray);
|
||
extern void scm_init_symbols (void);
|
||
|
||
extern int scm_can_use_top_level_lookup_closure_var;
|
||
|
||
#endif /* SYMBOLSH */
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|