-/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2008, 2009, 2011 Free Software Foundation, Inc.
- *
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004,
+ * 2006, 2008, 2009, 2011, 2013 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 3 of
#endif
#include <string.h>
+#include <stdarg.h>
#include "libguile/_scm.h"
#include "libguile/async.h"
return scm_symbol_to_keyword (scm_from_utf8_symbol (name));
}
+SCM_SYMBOL (scm_keyword_argument_error, "keyword-argument-error");
+
+void
+scm_c_bind_keyword_arguments (const char *subr, SCM rest,
+ scm_t_keyword_arguments_flags flags, ...)
+{
+ va_list va;
+
+ if (SCM_UNLIKELY (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS)
+ && scm_ilength (rest) % 2 != 0))
+ scm_error (scm_keyword_argument_error,
+ subr, "Odd length of keyword argument list",
+ SCM_EOL, SCM_BOOL_F);
+
+ while (scm_is_pair (rest))
+ {
+ SCM kw_or_arg = SCM_CAR (rest);
+ SCM tail = SCM_CDR (rest);
+
+ if (scm_is_keyword (kw_or_arg) && scm_is_pair (tail))
+ {
+ SCM kw;
+ SCM *arg_p;
+
+ va_start (va, flags);
+ for (;;)
+ {
+ kw = va_arg (va, SCM);
+ if (SCM_UNBNDP (kw))
+ {
+ /* KW_OR_ARG is not in the list of expected keywords. */
+ if (!(flags & SCM_ALLOW_OTHER_KEYS))
+ scm_error_scm (scm_keyword_argument_error,
+ scm_from_locale_string (subr),
+ scm_from_latin1_string
+ ("Unrecognized keyword"),
+ SCM_EOL, scm_list_1 (kw_or_arg));
+ break;
+ }
+ arg_p = va_arg (va, SCM *);
+ if (scm_is_eq (kw_or_arg, kw))
+ {
+ /* We found the matching keyword. Store the
+ associated value and break out of the loop. */
+ *arg_p = SCM_CAR (tail);
+ break;
+ }
+ }
+ va_end (va);
+
+ /* Advance REST. */
+ rest = SCM_CDR (tail);
+ }
+ else
+ {
+ /* The next argument is not a keyword, or is a singleton
+ keyword at the end of REST. */
+ if (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS))
+ scm_error_scm (scm_keyword_argument_error,
+ scm_from_locale_string (subr),
+ scm_from_latin1_string ("Invalid keyword"),
+ SCM_EOL, scm_list_1 (kw_or_arg));
+
+ /* Advance REST. */
+ rest = tail;
+ }
+ }
+}
+
/* njrev: critical sections reviewed so far up to here */
void
scm_init_keywords ()