Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / stacks.h

diff --git a/guile18/libguile/stacks.h b/guile18/libguile/stacks.h
new file mode 100644 (file)
index 0000000..e44bb1c
--- /dev/null
+++ b/guile18/libguile/stacks.h
@@ -0,0 +1,117 @@
+/* classes: h_files */
+
+#ifndef SCM_STACKS_H
+#define SCM_STACKS_H
+
+/* Copyright (C) 1995,1996,2000,2001, 2004, 2006 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
+
+#include "libguile/__scm.h"
+
+/* {Frames and stacks}
+ */
+
+typedef struct scm_t_info_frame {
+  /* SCM flags; */
+  scm_t_bits flags;
+  SCM source;
+  SCM proc;
+  SCM args;
+} scm_t_info_frame;
+#define SCM_FRAME_N_SLOTS (sizeof (scm_t_info_frame) / sizeof (SCM))
+
+#define SCM_STACK(obj) ((scm_t_stack *) SCM_STRUCT_DATA (obj))
+#define SCM_STACK_LAYOUT "pwuourpW"
+typedef struct scm_t_stack {
+  SCM id;                      /* Stack id */
+  scm_t_info_frame *frames;    /* Info frames */
+  unsigned long length;                /* Stack length */
+  unsigned long tail_length;
+  scm_t_info_frame tail[1];
+} scm_t_stack;
+
+SCM_API SCM scm_stack_type;
+
+#define SCM_STACKP(obj) (SCM_STRUCTP (obj) && scm_is_eq (SCM_STRUCT_VTABLE (obj), scm_stack_type))
+#define SCM_STACK_LENGTH(stack) (SCM_STACK (stack) -> length)
+
+#define SCM_FRAMEP(obj) \
+  (scm_is_pair (obj) && SCM_STACKP (SCM_CAR (obj)) \
+   && scm_is_unsigned_integer (SCM_CDR (obj), \
+                               0, SCM_STACK_LENGTH (SCM_CAR (obj))-1))
+
+#define SCM_FRAME_REF(frame, slot) \
+(SCM_STACK (SCM_CAR (frame)) -> frames[scm_to_size_t (SCM_CDR (frame))].slot)
+
+#define SCM_FRAME_NUMBER(frame) \
+(SCM_BACKWARDS_P \
+ ? scm_to_size_t (SCM_CDR (frame)) \
+ : (SCM_STACK_LENGTH (SCM_CAR (frame)) \
+    - scm_to_size_t (SCM_CDR (frame)) \
+    - 1)) \
+
+#define SCM_FRAME_FLAGS(frame) SCM_FRAME_REF (frame, flags)
+#define SCM_FRAME_SOURCE(frame) SCM_FRAME_REF (frame, source)
+#define SCM_FRAME_PROC(frame) SCM_FRAME_REF (frame, proc)
+#define SCM_FRAME_ARGS(frame) SCM_FRAME_REF (frame, args)
+#define SCM_FRAME_PREV(frame) scm_frame_previous (frame)
+#define SCM_FRAME_NEXT(frame) scm_frame_next (frame)
+
+#define SCM_FRAMEF_VOID                (1L << 2)
+#define SCM_FRAMEF_REAL                (1L << 3)
+#define SCM_FRAMEF_PROC        (1L << 4)
+#define SCM_FRAMEF_EVAL_ARGS   (1L << 5)
+#define SCM_FRAMEF_OVERFLOW    (1L << 6)
+
+#define SCM_FRAME_VOID_P(f)       (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_VOID)
+#define SCM_FRAME_REAL_P(f)       (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_REAL)
+#define SCM_FRAME_PROC_P(f)       (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_PROC)
+#define SCM_FRAME_EVAL_ARGS_P(f)  (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_EVAL_ARGS)
+#define SCM_FRAME_OVERFLOW_P(f)   (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_OVERFLOW)
+
+\f
+
+SCM_API SCM scm_stack_p (SCM obj);
+SCM_API SCM scm_make_stack (SCM obj, SCM args);
+SCM_API SCM scm_stack_id (SCM stack);
+SCM_API SCM scm_stack_ref (SCM stack, SCM i);
+SCM_API SCM scm_stack_length (SCM stack);
+
+SCM_API SCM scm_frame_p (SCM obj);
+SCM_API SCM scm_last_stack_frame (SCM obj);
+SCM_API SCM scm_frame_number (SCM frame);
+SCM_API SCM scm_frame_source (SCM frame);
+SCM_API SCM scm_frame_procedure (SCM frame);
+SCM_API SCM scm_frame_arguments (SCM frame);
+SCM_API SCM scm_frame_previous (SCM frame);
+SCM_API SCM scm_frame_next (SCM frame);
+SCM_API SCM scm_frame_real_p (SCM frame);
+SCM_API SCM scm_frame_procedure_p (SCM frame);
+SCM_API SCM scm_frame_evaluating_args_p (SCM frame);
+SCM_API SCM scm_frame_overflow_p (SCM frame);
+
+SCM_API void scm_init_stacks (void);
+
+#endif  /* SCM_STACKS_H */
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/