-/* classes: h_files */
-
-#ifndef SYMBOLSH
-#define SYMBOLSH
-/* Copyright (C) 1995,1996,1997,1998, 2000 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 */
-\f
-
-#include "libguile/__scm.h"
-\f
-
-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); }
-
-\f
-
-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);
-
-#endif /* SYMBOLSH */
-
-/*
- Local Variables:
- c-file-style: "gnu"
- End:
-*/
+/* classes: h_files */
+
+#ifndef SCM_SYMBOLS_H
+#define SCM_SYMBOLS_H
+
+/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2003 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+\f
+
+#include "libguile/__scm.h"
+\f
+
+/* SCM_SYMBOL_LENGTH(SYM) is the length of SYM's name in characters, and
+ * SCM_SYMBOL_CHARS(SYM) is the address of the first character of SYM's name.
+ *
+ * SCM_SYMBOL_HASH is a hash value for the symbol. It is also used to
+ * encode whether the symbol is interned or not. See
+ * SCM_SYMBOL_INTERNED_P.
+ */
+
+#define SCM_SYMBOLP(x) (!SCM_IMP (x) && (SCM_TYP7 (x) == scm_tc7_symbol))
+#define SCM_SYMBOL_LENGTH(x) (((unsigned long) SCM_CELL_WORD_0 (x)) >> 8)
+#define SCM_MAKE_SYMBOL_TAG(l) (((l) << 8) + scm_tc7_symbol)
+#define SCM_SET_SYMBOL_LENGTH(s, l) (SCM_SET_CELL_WORD_0 ((s), SCM_MAKE_SYMBOL_TAG(l)))
+#define SCM_SYMBOL_CHARS(x) ((char *) (SCM_CELL_WORD_1 (x)))
+#define SCM_SET_SYMBOL_CHARS(s, c) (SCM_SET_CELL_WORD_1 ((s), (c)))
+#define SCM_SYMBOL_HASH(X) ((unsigned long) SCM_CELL_WORD_2 (X))
+#define SCM_SYMBOL_INTERNED_P(X) (SCM_SYMBOL_HASH(X) <= (SCM_T_BITS_MAX/2))
+
+#define SCM_PROP_SLOTS(X) (SCM_CELL_OBJECT_3 (X))
+#define SCM_SET_PROP_SLOTS(X, v) (SCM_SET_CELL_OBJECT_3 ((X), (v)))
+#define SCM_SYMBOL_FUNC(X) (SCM_CAR (SCM_CELL_OBJECT_3 (X)))
+#define SCM_SET_SYMBOL_FUNC(X, v) (SCM_SETCAR (SCM_CELL_OBJECT_3 (X), (v)))
+#define SCM_SYMBOL_PROPS(X) (SCM_CDR (SCM_CELL_OBJECT_3 (X)))
+#define SCM_SET_SYMBOL_PROPS(X, v) (SCM_SETCDR (SCM_CELL_OBJECT_3 (X), (v)))
+
+\f
+
+#ifdef GUILE_DEBUG
+SCM_API SCM scm_sys_symbols (void);
+#endif
+SCM_API unsigned long scm_i_hash_symbol (SCM obj, unsigned long n, void *closure);
+SCM_API SCM scm_mem2symbol (const char*, size_t);
+SCM_API SCM scm_mem2uninterned_symbol (const char *name, size_t len);
+SCM_API SCM scm_str2symbol (const char*);
+
+SCM_API SCM scm_symbol_p (SCM x);
+SCM_API SCM scm_symbol_interned_p (SCM sym);
+SCM_API SCM scm_make_symbol (SCM name);
+SCM_API SCM scm_symbol_to_string (SCM s);
+SCM_API SCM scm_string_to_symbol (SCM s);
+
+SCM_API SCM scm_symbol_fref (SCM s);
+SCM_API SCM scm_symbol_pref (SCM s);
+SCM_API SCM scm_symbol_fset_x (SCM s, SCM val);
+SCM_API SCM scm_symbol_pset_x (SCM s, SCM val);
+
+SCM_API SCM scm_symbol_hash (SCM s);
+SCM_API SCM scm_gensym (SCM prefix);
+
+SCM_API char *scm_c_symbol2str (SCM obj, char *str, size_t *lenp);
+SCM_API void scm_symbols_prehistory (void);
+SCM_API void scm_init_symbols (void);
+
+#endif /* SCM_SYMBOLS_H */
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff