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80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Frame object interface */
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typedef struct {
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int b_type; /* what kind of block this is */
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int b_handler; /* where to jump to find handler */
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int b_level; /* value stack level to pop to */
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} block;
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typedef struct _frame {
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OB_HEAD
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struct _frame *f_back; /* previous frame, or NULL */
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codeobject *f_code; /* code segment */
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object *f_globals; /* global symbol table (dictobject) */
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object *f_locals; /* local symbol table (dictobject) */
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object **f_valuestack; /* malloc'ed array */
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block *f_blockstack; /* malloc'ed array */
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int f_nvalues; /* size of f_valuestack */
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int f_nblocks; /* size of f_blockstack */
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int f_iblock; /* index in f_blockstack */
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} frameobject;
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/* Standard object interface */
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extern typeobject Frametype;
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#define is_frameobject(op) ((op)->ob_type == &Frametype)
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frameobject * newframeobject PROTO(
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(frameobject *, codeobject *, object *, object *, int, int));
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/* The rest of the interface is specific for frame objects */
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/* List access macros */
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#ifdef NDEBUG
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#define GETITEM(v, i) GETLISTITEM((listobject *)(v), (i))
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#define GETITEMNAME(v, i) GETSTRINGVALUE((stringobject *)GETITEM((v), (i)))
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#else
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#define GETITEM(v, i) getlistitem((v), (i))
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#define GETITEMNAME(v, i) getstringvalue(getlistitem((v), (i)))
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#endif
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#define GETUSTRINGVALUE(s) ((unsigned char *)GETSTRINGVALUE(s))
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/* Code access macros */
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#define Getconst(f, i) (GETITEM((f)->f_code->co_consts, (i)))
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#define Getname(f, i) (GETITEMNAME((f)->f_code->co_names, (i)))
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/* Block management functions */
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void setup_block PROTO((frameobject *, int, int, int));
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block *pop_block PROTO((frameobject *));
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