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Diffstat (limited to 'libguile/kw.c')
-rw-r--r-- | libguile/kw.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/libguile/kw.c b/libguile/kw.c new file mode 100644 index 000000000..e559ef3ea --- /dev/null +++ b/libguile/kw.c @@ -0,0 +1,164 @@ +/* Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, 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. + */ + + +#include <stdio.h> +#include "_scm.h" + + + +#ifdef __STDC__ +static scm_sizet +free_kw (SCM obj) +#else +static scm_sizet +free_kw (obj) + SCM obj; +#endif +{ + return 0; +} + +#ifdef __STDC__ +static int +prin_kw (SCM exp, SCM port, int writing) +#else +static int +prin_kw (exp, port, writing) + SCM exp; + SCM port; + int writing; +#endif +{ + scm_gen_puts (scm_regular_string, ":", port); + scm_gen_puts((SCM_MB_STRINGP(SCM_CDR (exp)) + ? scm_mb_string + : scm_regular_string), + 1 + SCM_CHARS (SCM_CDR (exp)), + port); + return 1; +} + +int scm_tc16_kw; + +static scm_smobfuns kw_smob = {scm_markcdr, free_kw, prin_kw, 0}; + + + +SCM_PROC (s_make_keyword_from_dash_symbol, "make-keyword-from-dash-symbol", 1, 0, 0, scm_make_keyword_from_dash_symbol); +#ifdef __STDC__ +SCM +scm_make_keyword_from_dash_symbol (SCM symbol) +#else +SCM +scm_make_keyword_from_dash_symbol (symbol) + SCM symbol; +#endif +{ + SCM vcell; + + SCM_ASSERT (SCM_NIMP (symbol) && SCM_SYMBOLP(symbol) && ('-' == SCM_CHARS(symbol)[0]), + symbol, SCM_ARG1, s_make_keyword_from_dash_symbol); + + + SCM_DEFER_INTS; + vcell = scm_sym2ovcell_soft (symbol, scm_kw_obarray); + if (vcell == SCM_BOOL_F) + { + SCM kw; + SCM_NEWCELL(kw); + SCM_CAR(kw) = (SCM)scm_tc16_kw; + SCM_CDR(kw) = symbol; + scm_intern_symbol (scm_kw_obarray, symbol); + vcell = scm_sym2ovcell_soft (symbol, scm_kw_obarray); + SCM_CDR (vcell) = kw; + } + SCM_ALLOW_INTS; + return SCM_CDR (vcell); +} + +SCM_PROC(s_keyword_p, "keyword?", 1, 0, 0, scm_keyword_p); +#ifdef __STDC__ +SCM +scm_keyword_p (SCM obj) +#else +SCM +scm_keyword_p (obj) + SCM obj; +#endif +{ + return ( (SCM_NIMP(obj) && SCM_KEYWORDP (obj)) + ? SCM_BOOL_T + : SCM_BOOL_F); +} + + + +SCM_PROC(s_keyword_dash_symbol, "keyword-dash-symbol", 1, 0, 0, scm_keyword_dash_symbol); +#ifdef __STDC__ +SCM +scm_keyword_dash_symbol (SCM kw) +#else +SCM +scm_keyword_dash_symbol (kw) + SCM kw; +#endif +{ + SCM_ASSERT (SCM_NIMP (kw) && SCM_KEYWORDP (kw), kw, SCM_ARG1, s_keyword_dash_symbol); + return SCM_CDR (kw); +} + + + + +#ifdef __STDC__ +void +scm_init_kw (void) +#else +void +scm_init_kw () +#endif +{ + scm_tc16_kw = scm_newsmob (&kw_smob); + scm_kw_obarray = scm_make_vector (SCM_MAKINUM (256), SCM_EOL, SCM_UNDEFINED); +#include "kw.x" +} + |