7929041ebe
fully registered. (This is the second try, the first import ignored .info files but not .info-* files, for some reason. I'm going to make this consistent.) Reviewed by: core Approved for: 2.2
386 lines
12 KiB
C
386 lines
12 KiB
C
/* This is a minimally edited version of Guile's tags.h. */
|
||
/* classes: h_files */
|
||
|
||
#ifndef TAGSH
|
||
#define TAGSH
|
||
/* Copyright (C) 1995 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.
|
||
*/
|
||
|
||
|
||
/** This file defines the format of SCM values and cons pairs.
|
||
** It is here that tag bits are assigned for various purposes.
|
||
**/
|
||
|
||
|
||
/* Three Bit Tags
|
||
*
|
||
* 000 -- a non-immediate value. Points into the pair heap.
|
||
*
|
||
* 001 -- a gloc (i.e., a resolved global variable in a CAR in a code graph)
|
||
* or the CAR of an object handle (i.e., the tagged pointer to the
|
||
* vtable part of a user-defined object).
|
||
*
|
||
* If X has this tag, the value at CDAR(X - 1) distinguishes
|
||
* glocs from object handles. The distinction only needs
|
||
* to be made in a few places. Only a few parts of the code know
|
||
* about glocs. In most cases, when a value in the CAR of a pair
|
||
* has the tag 001, it means that the pair is an object handle.
|
||
*
|
||
* 010 -- the tag for immediate, exact integers.
|
||
*
|
||
* 011 -- in the CAR of a pair, this tag indicates that the pair is a closure.
|
||
* The remaining bits of the CAR are a pointer into the pair heap
|
||
* to the code graph for the closure.
|
||
*
|
||
* 1xy -- an extension tag which means that there is a five or six bit
|
||
* tag to the left of the low three bits. See the nice diagrams
|
||
* in ../doc/code.doc if you want to know what the bits mean.
|
||
*/
|
||
|
||
|
||
|
||
|
||
|
||
#define scm_tc3_cons 0
|
||
#define scm_tc3_cons_gloc 1
|
||
#define scm_tc3_closure 3
|
||
|
||
#define scm_tc7_ssymbol 5
|
||
#define scm_tc7_msymbol 7
|
||
#define scm_tc7_string 13
|
||
#define scm_tc7_bvect 15
|
||
#define scm_tc7_vector 21
|
||
#define scm_tc7_lvector 23
|
||
#define scm_tc7_ivect 29
|
||
#define scm_tc7_uvect 31
|
||
/* spare 37 39 */
|
||
#define scm_tc7_fvect 45
|
||
#define scm_tc7_dvect 47
|
||
#define scm_tc7_cvect 53
|
||
#define scm_tc7_port 55
|
||
#define scm_tc7_contin 61
|
||
#define scm_tc7_cclo 63
|
||
/* spare 69 71 77 79 */
|
||
#define scm_tc7_subr_0 85
|
||
#define scm_tc7_subr_1 87
|
||
#define scm_tc7_cxr 93
|
||
#define scm_tc7_subr_3 95
|
||
#define scm_tc7_subr_2 101
|
||
#define scm_tc7_asubr 103
|
||
#define scm_tc7_subr_1o 109
|
||
#define scm_tc7_subr_2o 111
|
||
#define scm_tc7_lsubr_2 117
|
||
#define scm_tc7_lsubr 119
|
||
#define scm_tc7_rpsubr 125
|
||
|
||
#define scm_tc7_smob 127
|
||
#define scm_tc_free_cell 127
|
||
|
||
#define scm_tc16_flo 0x017f
|
||
#define scm_tc_flo 0x017fL
|
||
|
||
#define SCM_REAL_PART (1L<<16)
|
||
#define SCM_IMAG_PART (2L<<16)
|
||
#define scm_tc_dblr (scm_tc16_flo|REAL_PART)
|
||
#define scm_tc_dblc (scm_tc16_flo|REAL_PART|IMAG_PART)
|
||
|
||
#define scm_tc16_bigpos 0x027f
|
||
#define scm_tc16_bigneg 0x037f
|
||
|
||
#define scm_tc16_fport (scm_tc7_port + 0*256L)
|
||
#define scm_tc16_pipe (scm_tc7_port + 1*256L)
|
||
#define scm_tc16_strport (scm_tc7_port + 2*256L)
|
||
#define scm_tc16_sfport (scm_tc7_port + 3*256L)
|
||
|
||
|
||
|
||
/* For cons pairs with immediate values in the CAR */
|
||
#define scm_tcs_cons_imcar 2:case 4:case 6:case 10:\
|
||
case 12:case 14:case 18:case 20:\
|
||
case 22:case 26:case 28:case 30:\
|
||
case 34:case 36:case 38:case 42:\
|
||
case 44:case 46:case 50:case 52:\
|
||
case 54:case 58:case 60:case 62:\
|
||
case 66:case 68:case 70:case 74:\
|
||
case 76:case 78:case 82:case 84:\
|
||
case 86:case 90:case 92:case 94:\
|
||
case 98:case 100:case 102:case 106:\
|
||
case 108:case 110:case 114:case 116:\
|
||
case 118:case 122:case 124:case 126
|
||
|
||
/* For cons pairs with non-immediate values in the CAR */
|
||
#define scm_tcs_cons_nimcar 0:case 8:case 16:case 24:\
|
||
case 32:case 40:case 48:case 56:\
|
||
case 64:case 72:case 80:case 88:\
|
||
case 96:case 104:case 112:case 120
|
||
|
||
/* A CONS_GLOC occurs in code. It's CAR is a pointer to the
|
||
* CDR of a variable. The low order bits of the CAR are 001.
|
||
* The CDR of the gloc is the code continuation.
|
||
*/
|
||
#define scm_tcs_cons_gloc 1:case 9:case 17:case 25:\
|
||
case 33:case 41:case 49:case 57:\
|
||
case 65:case 73:case 81:case 89:\
|
||
case 97:case 105:case 113:case 121
|
||
|
||
#define scm_tcs_closures 3:case 11:case 19:case 27:\
|
||
case 35:case 43:case 51:case 59:\
|
||
case 67:case 75:case 83:case 91:\
|
||
case 99:case 107:case 115:case 123
|
||
|
||
#define scm_tcs_subrs scm_tc7_asubr:case scm_tc7_subr_0:case scm_tc7_subr_1:case scm_tc7_cxr:\
|
||
case scm_tc7_subr_3:case scm_tc7_subr_2:case scm_tc7_rpsubr:case scm_tc7_subr_1o:\
|
||
case scm_tc7_subr_2o:case scm_tc7_lsubr_2:case scm_tc7_lsubr
|
||
|
||
#define scm_tcs_symbols scm_tc7_ssymbol:case scm_tc7_msymbol
|
||
|
||
#define scm_tcs_bignums tc16_bigpos:case tc16_bigneg
|
||
|
||
|
||
|
||
/* References to objects are of type SCM. Values may be non-immediate
|
||
* (pointers) or immediate (encoded, immutable, scalar values that fit
|
||
* in an SCM variable).
|
||
*/
|
||
|
||
typedef long SCM;
|
||
|
||
/* Cray machines have pointers that are incremented once for each word,
|
||
* rather than each byte, the 3 most significant bits encode the byte
|
||
* within the word. The following macros deal with this by storing the
|
||
* native Cray pointers like the ones that looks like scm expects. This
|
||
* is done for any pointers that might appear in the car of a scm_cell, pointers
|
||
* to scm_vector elts, functions, &c are not munged.
|
||
*/
|
||
#ifdef _UNICOS
|
||
# define SCM2PTR(x) ((int)(x) >> 3)
|
||
# define PTR2SCM(x) (((SCM)(x)) << 3)
|
||
# define SCM_POINTERS_MUNGED
|
||
#else
|
||
# define SCM2PTR(x) (x)
|
||
# define PTR2SCM(x) ((SCM)(x))
|
||
#endif /* def _UNICOS */
|
||
|
||
|
||
|
||
/* Immediate? Predicates
|
||
*/
|
||
#define SCM_IMP(x) (6 & (int)(x))
|
||
#define SCM_NIMP(x) (!SCM_IMP(x))
|
||
|
||
|
||
|
||
enum scm_tags
|
||
{
|
||
scm_tc8_char = 0xf4
|
||
};
|
||
|
||
#define SCM_ITAG8(X) ((int)(X) & 0xff)
|
||
#define SCM_MAKE_ITAG8(X, TAG) (((X)<<8) + TAG)
|
||
#define SCM_ITAG8_DATA(X) ((X)>>8)
|
||
|
||
|
||
|
||
/* Local Environment Structure
|
||
*/
|
||
#define SCM_ILOCP(n) ((0xff & (int)(n))==0xfc)
|
||
#define SCM_ILOC00 (0x000000fcL)
|
||
#define SCM_IDINC (0x00100000L)
|
||
#define SCM_ICDR (0x00080000L)
|
||
#define SCM_IFRINC (0x00000100L)
|
||
#define SCM_IDSTMSK (-SCM_IDINC)
|
||
#define SCM_IFRAME(n) ((int)((SCM_ICDR-SCM_IFRINC)>>8) & ((int)(n)>>8))
|
||
#define SCM_IDIST(n) (((unsigned long)(n))>>20)
|
||
#define SCM_ICDRP(n) (SCM_ICDR & (n))
|
||
|
||
|
||
/* Immediate Symbols, Special Symbols, Flags (various constants).
|
||
*/
|
||
|
||
/* ISYMP tests for ISPCSYM and ISYM */
|
||
#define SCM_ISYMP(n) ((0x187 & (int)(n))==4)
|
||
|
||
/* IFLAGP tests for ISPCSYM, ISYM and IFLAG */
|
||
#define SCM_IFLAGP(n) ((0x87 & (int)(n))==4)
|
||
#define SCM_ISYMNUM(n) ((int)((n)>>9))
|
||
#define SCM_ISYMCHARS(n) (scm_isymnames[SCM_ISYMNUM(n)])
|
||
#define SCM_MAKSPCSYM(n) (((n)<<9)+((n)<<3)+4L)
|
||
#define SCM_MAKISYM(n) (((n)<<9)+0x74L)
|
||
#define SCM_MAKIFLAG(n) (((n)<<9)+0x174L)
|
||
|
||
/* This table must agree with the declarations
|
||
* in repl.c: {Names of immediate symbols}.
|
||
*
|
||
* These are used only in eval but their values
|
||
* have to be allocated here.
|
||
*
|
||
*/
|
||
|
||
#define SCM_IM_AND SCM_MAKSPCSYM(0)
|
||
#define SCM_IM_BEGIN SCM_MAKSPCSYM(1)
|
||
#define SCM_IM_CASE SCM_MAKSPCSYM(2)
|
||
#define SCM_IM_COND SCM_MAKSPCSYM(3)
|
||
#define SCM_IM_DO SCM_MAKSPCSYM(4)
|
||
#define SCM_IM_IF SCM_MAKSPCSYM(5)
|
||
#define SCM_IM_LAMBDA SCM_MAKSPCSYM(6)
|
||
#define SCM_IM_LET SCM_MAKSPCSYM(7)
|
||
#define SCM_IM_LETSTAR SCM_MAKSPCSYM(8)
|
||
#define SCM_IM_LETREC SCM_MAKSPCSYM(9)
|
||
#define SCM_IM_OR SCM_MAKSPCSYM(10)
|
||
#define SCM_IM_QUOTE SCM_MAKSPCSYM(11)
|
||
#define SCM_IM_SET SCM_MAKSPCSYM(12)
|
||
#define SCM_IM_DEFINE SCM_MAKSPCSYM(13)
|
||
#define SCM_IM_APPLY SCM_MAKISYM(14)
|
||
#define SCM_IM_CONT SCM_MAKISYM(15)
|
||
#define SCM_NUM_ISYMS 16
|
||
|
||
/* Important immediates
|
||
*/
|
||
|
||
#define SCM_BOOL_F SCM_MAKIFLAG(SCM_NUM_ISYMS+0)
|
||
#define SCM_BOOL_T SCM_MAKIFLAG(SCM_NUM_ISYMS+1)
|
||
#define SCM_UNDEFINED SCM_MAKIFLAG(SCM_NUM_ISYMS+2)
|
||
#define SCM_EOF_VAL SCM_MAKIFLAG(SCM_NUM_ISYMS+3)
|
||
|
||
#ifdef SICP
|
||
#define SCM_EOL SCM_BOOL_F
|
||
#else
|
||
#define SCM_EOL SCM_MAKIFLAG(SCM_NUM_ISYMS+4)
|
||
#endif
|
||
|
||
#define SCM_UNSPECIFIED SCM_MAKIFLAG(SCM_NUM_ISYMS+5)
|
||
|
||
|
||
|
||
/* Heap Pairs and the Empty List Predicates
|
||
*/
|
||
#define SCM_NULLP(x) (SCM_EOL == (x))
|
||
#define SCM_NNULLP(x) (SCM_EOL != (x))
|
||
#define SCM_CELLP(x) (!SCM_NCELLP(x))
|
||
#define SCM_NCELLP(x) ((sizeof(scm_cell)-1) & (int)(x))
|
||
|
||
|
||
|
||
#define SCM_UNBNDP(x) (SCM_UNDEFINED==(x))
|
||
|
||
|
||
|
||
/* Testing and Changing GC Marks in Various Standard Positions
|
||
*/
|
||
#define SCM_GCMARKP(x) (1 & (int)SCM_CDR(x))
|
||
#define SCM_GC8MARKP(x) (0x80 & (int)SCM_CAR(x))
|
||
#define SCM_SETGCMARK(x) (SCM_CDR(x) |= 1)
|
||
#define SCM_CLRGCMARK(x) (SCM_CDR(x) &= ~1L)
|
||
#define SCM_SETGC8MARK(x) (SCM_CAR(x) |= 0x80)
|
||
#define SCM_CLRGC8MARK(x) (SCM_CAR(x) &= ~0x80L)
|
||
|
||
|
||
/* Extracting Tag Bits, With or Without GC Safety and Optional Bits
|
||
*/
|
||
#define SCM_TYP3(x) (7 & (int)SCM_CAR(x))
|
||
#define SCM_TYP7(x) (0x7f & (int)SCM_CAR(x))
|
||
#define SCM_TYP7S(x) (0x7d & (int)SCM_CAR(x))
|
||
#define SCM_TYP16(x) (0xffff & (int)SCM_CAR(x))
|
||
#define SCM_TYP16S(x) (0xfeff & (int)SCM_CAR(x))
|
||
#define SCM_GCTYP16(x) (0xff7f & (int)SCM_CAR(x))
|
||
|
||
|
||
/* Two slightly extensible types: smobs and ptobs.
|
||
*
|
||
*/
|
||
#define SCM_SMOBNUM(x) (0x0ff & (CAR(x)>>8));
|
||
#define SCM_PTOBNUM(x) (0x0ff & (CAR(x)>>8));
|
||
|
||
|
||
|
||
|
||
#define SCM_DIRP(x) (SCM_NIMP(x) && (TYP16(x)==(scm_tc16_dir)))
|
||
#define SCM_OPDIRP(x) (SCM_NIMP(x) && (CAR(x)==(scm_tc16_dir | OPN)))
|
||
|
||
|
||
|
||
/* Lvectors
|
||
*/
|
||
#define SCM_LVECTORP(x) (TYP7(x)==tc7_lvector)
|
||
|
||
|
||
#if 0
|
||
|
||
/* Sockets
|
||
*/
|
||
#define tc_socket (tc7_port | OPN)
|
||
#define SCM_SOCKP(x) (((0x7f | OPN | RDNG | WRTNG) & CAR(x))==(tc_socket))
|
||
#define SCM_SOCKTYP(x) (CAR(x)>>24)
|
||
|
||
|
||
|
||
extern int scm_tc16_key_vector;
|
||
#define SCM_KEYVECP(X) (scm_tc16_key_vector == TYP16 (X))
|
||
#define SCM_KEYVECLEN(OBJ) (((unsigned long)CAR (obj)) >> 16)
|
||
|
||
|
||
#define SCM_MALLOCDATA(obj) ((char *)CDR(obj))
|
||
#define SCM_MALLOCLEN(obj) (((unsigned long)CAR (obj)) >> 16)
|
||
#define SCM_WORDDATA(obj) (CDR (obj))
|
||
|
||
|
||
#define SCM_BYTECODEP(X) ((TYP7 (X) == tc7_cclo) && (CCLO_SUBR (X) == rb_proc))
|
||
#define SCM_BYTECODE_CONSTANTS(X) (VELTS(X)[1])
|
||
#define SCM_BYTECODE_CODE(X) (VELTS(X)[2])
|
||
#define SCM_BYTECODE_NAME(X) (VELTS(X)[3])
|
||
#define SCM_BYTECODE_BCODE(X) (VELTS(X)[4])
|
||
#define SCM_BYTECODE_ELTS 5
|
||
|
||
|
||
#define SCM_FREEP(x) (CAR(x)==tc_free_cell)
|
||
#define SCM_NFREEP(x) (!FREEP(x))
|
||
|
||
#endif /* 0*/
|
||
|
||
#ifdef __STDC__
|
||
|
||
#else /* STDC */
|
||
|
||
#endif /* STDC */
|
||
|
||
|
||
#endif /* TAGSH */
|