Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / keywords.c

diff --git a/guile18/libguile/keywords.c b/guile18/libguile/keywords.c
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+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+
+#include "libguile/_scm.h"
+#include "libguile/async.h"
+#include "libguile/ports.h"
+#include "libguile/root.h"
+#include "libguile/smob.h"
+#include "libguile/hashtab.h"
+
+#include "libguile/validate.h"
+#include "libguile/keywords.h"
+#include "libguile/strings.h"
+
+\f
+
+scm_t_bits scm_tc16_keyword;
+
+#define KEYWORDP(X)    (SCM_SMOB_PREDICATE (scm_tc16_keyword, (X)))
+#define KEYWORDSYM(X)  (SCM_SMOB_OBJECT (X))
+
+static int
+keyword_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+  scm_puts ("#:", port);
+  scm_display (KEYWORDSYM (exp), port);
+  return 1;
+}
+
+SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0, 
+            (SCM obj),
+           "Return @code{#t} if the argument @var{obj} is a keyword, else\n"
+           "@code{#f}.")
+#define FUNC_NAME s_scm_keyword_p
+{
+  return scm_from_bool (KEYWORDP (obj));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_symbol_to_keyword, "symbol->keyword", 1, 0, 0,
+           (SCM symbol),
+           "Return the keyword with the same name as @var{symbol}.")
+#define FUNC_NAME s_scm_symbol_to_keyword
+{
+  SCM keyword;
+
+  SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, 0, NULL, "symbol");
+
+  SCM_CRITICAL_SECTION_START;
+  /* njrev: NEWSMOB and hashq_set_x can raise errors */
+  keyword = scm_hashq_ref (scm_keyword_obarray, symbol, SCM_BOOL_F);
+  if (scm_is_false (keyword))
+    {
+      SCM_NEWSMOB (keyword, scm_tc16_keyword, SCM_UNPACK (symbol));
+      scm_hashq_set_x (scm_keyword_obarray, symbol, keyword);
+    }
+  SCM_CRITICAL_SECTION_END;
+  return keyword;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_keyword_to_symbol, "keyword->symbol", 1, 0, 0,
+           (SCM keyword),
+           "Return the symbol with the same name as @var{keyword}.")
+#define FUNC_NAME s_scm_keyword_to_symbol
+{
+  scm_assert_smob_type (scm_tc16_keyword, keyword);
+  return KEYWORDSYM (keyword);
+}
+#undef FUNC_NAME
+
+int
+scm_is_keyword (SCM val)
+{
+  return KEYWORDP (val);
+}
+
+SCM
+scm_from_locale_keyword (const char *str)
+{
+  return scm_symbol_to_keyword (scm_from_locale_symbol (str));
+}
+
+SCM
+scm_from_locale_keywordn (const char *str, size_t len)
+{
+  return scm_symbol_to_keyword (scm_from_locale_symboln (str, len));
+}
+
+/* njrev: critical sections reviewed so far up to here */
+void
+scm_init_keywords ()
+{
+  scm_tc16_keyword = scm_make_smob_type ("keyword", 0);
+  scm_set_smob_mark (scm_tc16_keyword, scm_markcdr);
+  scm_set_smob_print (scm_tc16_keyword, keyword_print);
+
+  scm_keyword_obarray = scm_c_make_hash_table (0);
+#include "libguile/keywords.x"
+}
+
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/