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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/scm-tags.h
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-rw-r--r--gdb/scm-tags.h385
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diff --git a/gdb/scm-tags.h b/gdb/scm-tags.h
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-/* 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 program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 */