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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
22a52da1 DH |
3 | #ifndef SCM_TAGS_H |
4 | #define SCM_TAGS_H | |
8c494e99 | 5 | |
28d52ebb | 6 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002 Free Software Foundation, Inc. |
8ce94504 | 7 | * |
0f2d19dd JB |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
8ce94504 | 12 | * |
0f2d19dd JB |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
8ce94504 | 17 | * |
0f2d19dd JB |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
20 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
21 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
22 | * |
23 | * As a special exception, the Free Software Foundation gives permission | |
24 | * for additional uses of the text contained in its release of GUILE. | |
25 | * | |
26 | * The exception is that, if you link the GUILE library with other files | |
27 | * to produce an executable, this does not by itself cause the | |
28 | * resulting executable to be covered by the GNU General Public License. | |
29 | * Your use of that executable is in no way restricted on account of | |
30 | * linking the GUILE library code into it. | |
31 | * | |
32 | * This exception does not however invalidate any other reasons why | |
33 | * the executable file might be covered by the GNU General Public License. | |
34 | * | |
35 | * This exception applies only to the code released by the | |
36 | * Free Software Foundation under the name GUILE. If you copy | |
37 | * code from other Free Software Foundation releases into a copy of | |
38 | * GUILE, as the General Public License permits, the exception does | |
39 | * not apply to the code that you add in this way. To avoid misleading | |
40 | * anyone as to the status of such modified files, you must delete | |
41 | * this exception notice from them. | |
42 | * | |
43 | * If you write modifications of your own for GUILE, it is your choice | |
44 | * whether to permit this exception to apply to your modifications. | |
82892bed | 45 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 46 | |
0f2d19dd JB |
47 | \f |
48 | ||
8ce94504 | 49 | /** This file defines the format of SCM values and cons pairs. |
0f2d19dd JB |
50 | ** It is here that tag bits are assigned for various purposes. |
51 | **/ | |
52 | ||
4a19973d MV |
53 | #ifdef HAVE_STDINT_H |
54 | #include <stdint.h> | |
55 | #endif | |
56 | ||
cda36c23 MV |
57 | #ifdef HAVE_INTTYPES_H |
58 | #include <inttypes.h> | |
59 | #endif | |
60 | ||
0f2d19dd JB |
61 | \f |
62 | ||
63 | /* In the beginning was the Word: | |
64 | */ | |
4a19973d | 65 | #ifdef HAVE_UINTPTR_T |
92c2555f MV |
66 | typedef uintptr_t scm_t_bits; |
67 | typedef intptr_t scm_t_signed_bits; | |
08ae8768 | 68 | #define SIZEOF_SCM_T_BITS SIZEOF_UINTPTR_T |
004c0902 MV |
69 | #define SCM_T_BITS_MAX UINTPTR_MAX |
70 | #define SCM_T_SIGNED_BITS_MAX INTPTR_MAX | |
71 | #define SCM_T_SIGNED_BITS_MIN INTPTR_MIN | |
4a19973d | 72 | #else |
92c2555f MV |
73 | typedef unsigned long scm_t_bits; |
74 | typedef signed long scm_t_signed_bits; | |
08ae8768 | 75 | #define SIZEOF_SCM_T_BITS SIZEOF_LONG |
004c0902 MV |
76 | #define SCM_T_BITS_MAX ULONG_MAX |
77 | #define SCM_T_SIGNED_BITS_MAX LONG_MAX | |
78 | #define SCM_T_SIGNED_BITS_MIN LONG_MIN | |
4a19973d | 79 | #endif |
8d3356e7 DH |
80 | |
81 | /* But as external interface, we use SCM, which may, according to the desired | |
82 | * level of type checking, be defined in several ways: | |
83 | */ | |
729dbac3 | 84 | #if (SCM_DEBUG_TYPING_STRICTNESS == 2) |
92c2555f MV |
85 | typedef union { struct { scm_t_bits n; } n; } SCM; |
86 | static SCM scm_pack(scm_t_bits b) { SCM s; s.n.n = b; return s; } | |
076d6063 | 87 | # define SCM_UNPACK(x) ((x).n.n) |
92c2555f | 88 | # define SCM_PACK(x) (scm_pack ((scm_t_bits) (x))) |
729dbac3 | 89 | #elif (SCM_DEBUG_TYPING_STRICTNESS == 1) |
8d3356e7 DH |
90 | /* This is the default, which provides an intermediate level of compile time |
91 | * type checking while still resulting in very efficient code. | |
c209c88e | 92 | */ |
729dbac3 | 93 | typedef struct scm_unused_struct * SCM; |
92c2555f | 94 | # define SCM_UNPACK(x) ((scm_t_bits) (x)) |
076d6063 | 95 | # define SCM_PACK(x) ((SCM) (x)) |
c209c88e | 96 | #else |
8d3356e7 DH |
97 | /* This should be used as a fall back solution for machines on which casting |
98 | * to a pointer may lead to loss of bit information, e. g. in the three least | |
99 | * significant bits. | |
100 | */ | |
92c2555f | 101 | typedef scm_t_bits SCM; |
076d6063 | 102 | # define SCM_UNPACK(x) (x) |
92c2555f | 103 | # define SCM_PACK(x) ((scm_t_bits) (x)) |
c209c88e | 104 | #endif |
0f2d19dd | 105 | |
8d3356e7 DH |
106 | |
107 | /* SCM values can not be compared by using the operator ==. Use the following | |
108 | * macro instead, which is the equivalent of the scheme predicate 'eq?'. | |
109 | */ | |
110 | #define SCM_EQ_P(x, y) (SCM_UNPACK (x) == SCM_UNPACK (y)) | |
111 | ||
0f2d19dd | 112 | \f |
2549a709 | 113 | |
0f2d19dd JB |
114 | /* SCM variables can contain: |
115 | * | |
116 | * Non-objects -- meaning that the tag-related macros don't apply to them | |
117 | * in the usual way. | |
118 | * | |
119 | * Immediates -- meaning that the variable contains an entire Scheme object. | |
120 | * | |
3c205827 JB |
121 | * Non-immediates -- meaning that the variable holds a (possibly |
122 | * tagged) pointer into the cons pair heap. | |
123 | * | |
124 | * Non-objects are distinguished from other values by careful coding | |
125 | * only (i.e., programmers must keep track of any SCM variables they | |
126 | * create that don't contain ordinary scheme values). | |
127 | * | |
904a077d MV |
128 | * All immediates and pointers to cells of non-immediates have a 0 in |
129 | * bit 0. All non-immediates that are not pairs have a 1 in bit 0 of | |
130 | * the first word of their cell. This is how pairs are distinguished | |
131 | * from other non-immediates; a pair can have a immediate in its car | |
132 | * (thus a 0 in bit 0), or a pointer to the cell of a non-immediate | |
133 | * (again, this pointer has a 0 in bit 0). | |
134 | * | |
135 | * Immediates and non-immediates are distinguished by bits 1 and 2. | |
136 | * Immediate values must have a 1 in at least one of those bits. | |
137 | * Consequently, a pointer to a cell of a non-immediate must have | |
138 | * zeros in bits 1 and 2. Together with the requirement from above | |
139 | * that bit 0 must also be zero, this means that pointers to cells of | |
140 | * non-immediates must have their three low bits all zero. This in | |
141 | * turn means that cells must be aligned on a 8 byte boundary, which | |
142 | * is just right for two 32bit numbers (surprise, surprise). Does | |
143 | * this (or any other detail of tagging) seem arbitrary? Try changing | |
144 | * it! (Not always impossible but it is fair to say that many details | |
145 | * of tags are mutually dependent). */ | |
0f2d19dd | 146 | |
f1267706 | 147 | #define SCM_IMP(x) (6 & SCM_UNPACK (x)) |
76189127 | 148 | #define SCM_NIMP(x) (!SCM_IMP (x)) |
0f2d19dd JB |
149 | |
150 | /* Here is a summary of tagging in SCM values as they might occur in | |
8ce94504 | 151 | * SCM variables or in the heap. |
0f2d19dd JB |
152 | * |
153 | * low bits meaning | |
154 | * | |
8ce94504 | 155 | * |
0f2d19dd | 156 | * 0 Most objects except... |
904a077d MV |
157 | * 1 ... structs (this tag is valid only in the header |
158 | * of a struct's data, as with all odd tags). | |
0f2d19dd JB |
159 | * |
160 | * 00 heap addresses and many immediates (not integers) | |
904a077d | 161 | * 01 structs, some tc7_ codes |
0f2d19dd JB |
162 | * 10 immediate integers |
163 | * 11 various tc7_ codes including, tc16_ codes. | |
164 | * | |
165 | * | |
166 | * 000 heap address | |
904a077d | 167 | * 001 structs |
0f2d19dd JB |
168 | * 010 integer |
169 | * 011 closure | |
170 | * 100 immediates | |
171 | * 101 tc7_ | |
172 | * 110 integer | |
173 | * 111 tc7_ | |
174 | * | |
175 | * | |
176 | * 100 --- IMMEDIATES | |
177 | * | |
178 | * Looking at the seven final bits of an immediate: | |
8ce94504 | 179 | * |
0f2d19dd JB |
180 | * 0000-100 short instruction |
181 | * 0001-100 short instruction | |
182 | * 0010-100 short instruction | |
183 | * 0011-100 short instruction | |
184 | * 0100-100 short instruction | |
185 | * 0101-100 short instruction | |
186 | * 0110-100 various immediates and long instructions | |
187 | * 0111-100 short instruction | |
188 | * 1000-100 short instruction | |
189 | * 1001-100 short instruction | |
190 | * 1010-100 short instruction | |
191 | * 1011-100 short instruction | |
192 | * 1100-100 short instruction | |
193 | * 1101-100 short instruction | |
194 | * 1110-100 immediate characters | |
195 | * 1111-100 ilocs | |
196 | * | |
8ce94504 | 197 | * Some of the 0110100 immediates are long instructions (they dispatch |
0f2d19dd JB |
198 | * in two steps compared to one step for a short instruction). |
199 | * The two steps are, (1) dispatch on 7 bits to the long instruction | |
200 | * handler, (2) dispatch on 7 additional bits. | |
201 | * | |
202 | * One way to think of it is that there are 128 short instructions, | |
203 | * with the 13 immediates above being some of the most interesting. | |
204 | * | |
205 | * Also noteworthy are the groups of 16 7-bit instructions implied by | |
904a077d MV |
206 | * some of the 3-bit tags. For example, closure references consist of |
207 | * an 8-byte aligned address tagged with 011. There are 16 identical | |
208 | * 7-bit instructions, all ending 011, which are invoked by evaluating | |
209 | * closures. | |
0f2d19dd JB |
210 | * |
211 | * In other words, if you hand the evaluator a closure, the evaluator | |
904a077d MV |
212 | * treats the closure as a graph of virtual machine instructions. A |
213 | * closure is a pair with a pointer to the body of the procedure in | |
214 | * the CDR and a pointer to the environment of the closure in the CAR. | |
0f2d19dd | 215 | * The environment pointer is tagged 011 which implies that the least |
904a077d MV |
216 | * significant 7 bits of the environment pointer also happen to be a |
217 | * virtual machine instruction we could call "SELF" (for | |
218 | * self-evaluating object). | |
219 | * | |
220 | * A less trivial example are the 16 instructions ending 000. If | |
221 | * those bits tag the CAR of a pair, then evidently the pair is an | |
222 | * ordinary cons pair and should be evaluated as a procedure | |
223 | * application. The sixteen, 7-bit 000 instructions are all | |
224 | * "NORMAL-APPLY" (Things get trickier. For example, if the CAR of a | |
225 | * procedure application is a symbol, the NORMAL-APPLY instruction | |
226 | * will, as a side effect, overwrite that CAR with a new instruction | |
227 | * that contains a cached address for the variable named by the | |
228 | * symbol.) | |
0f2d19dd JB |
229 | * |
230 | * Here is a summary of tags in the CAR of a non-immediate: | |
231 | * | |
33138b05 HWN |
232 | * cons ..........SCM car..............0 ...........SCM cdr.............0 |
233 | * struct ..........void * type........001 ...........void * data.........0 | |
234 | * closure ..........SCM code...........011 ...........SCM env.............0 | |
235 | * tc7 ......24.bits of data...0xxxx1S1 ..........void *data............ | |
0f2d19dd JB |
236 | * |
237 | * | |
238 | * | |
239 | * 101 & 111 --- tc7_ types | |
240 | * | |
8ce94504 JB |
241 | * tc7_tags are 7 bit tags ending in 1x1. These tags |
242 | * occur only in the CAR of heap cells, and have the | |
243 | * handy property that all bits of the CAR above the | |
a002f1a2 | 244 | * bottom eight can be used to store some data, thus |
8ce94504 | 245 | * saving a word in the body itself. Thus, we use them |
28b06554 | 246 | * for strings and vectors (among other things). |
0f2d19dd | 247 | * |
a002f1a2 | 248 | * TYP7(X) returns bits 0...6 of CELL_TYPE (X) |
0f2d19dd | 249 | * |
8ce94504 | 250 | * Sometimes we choose the bottom seven bits carefully, |
c2cb2500 JB |
251 | * so that the 2-valued bit (called S bit) can be masked |
252 | * off to reveal a common type. | |
8ce94504 | 253 | * |
0f2d19dd | 254 | * TYP7S(X) returns TYP7, but masking out the option bit S. |
0f2d19dd | 255 | * |
0f2d19dd JB |
256 | * Some TC7 types are subdivided into 256 subtypes giving |
257 | * rise to the macros: | |
258 | * | |
259 | * TYP16 | |
260 | * TYP16S | |
0f2d19dd JB |
261 | * |
262 | * TYP16S functions similarly wrt to TYP16 as TYP7S to TYP7, | |
263 | * but a different option bit is used (bit 2 for TYP7S, | |
264 | * bit 8 for TYP16S). | |
8ce94504 | 265 | * */ |
0f2d19dd JB |
266 | |
267 | ||
268 | ||
269 | \f | |
270 | /* {Non-immediate values.} | |
271 | * | |
272 | * If X is non-immediate, it is necessary to look at SCM_CAR (X) to | |
c2cb2500 JB |
273 | * figure out Xs type. X may be a cons pair, in which case the value |
274 | * SCM_CAR (x) will be either an immediate or non-immediate value. X | |
275 | * may be something other than a cons pair, in which case the value | |
276 | * SCM_CAR (x) will be a non-object value. | |
277 | * | |
278 | * All immediates and non-immediates have a 0 in bit 0. We | |
279 | * additionally preserve the invariant that all non-object values | |
280 | * stored in the SCM_CAR of a non-immediate object have a 1 in bit 1: | |
0f2d19dd JB |
281 | */ |
282 | ||
22a52da1 | 283 | #define SCM_CONSP(x) (!SCM_IMP (x) && ((1 & SCM_CELL_TYPE (x)) == 0)) |
445f675c | 284 | #define SCM_NCONSP(x) (!SCM_CONSP (x)) |
0f2d19dd | 285 | |
0f2d19dd JB |
286 | \f |
287 | ||
8ce94504 | 288 | /* See numbers.h for macros relating to immediate integers. |
0f2d19dd JB |
289 | */ |
290 | ||
904a077d MV |
291 | #define SCM_ITAG3(x) (7 & SCM_UNPACK (x)) |
292 | #define SCM_TYP3(x) (7 & SCM_CELL_TYPE (x)) | |
293 | #define scm_tc3_cons 0 | |
294 | #define scm_tc3_struct 1 | |
295 | #define scm_tc3_int_1 2 | |
c209c88e GB |
296 | #define scm_tc3_closure 3 |
297 | #define scm_tc3_imm24 4 | |
298 | #define scm_tc3_tc7_1 5 | |
299 | #define scm_tc3_int_2 6 | |
300 | #define scm_tc3_tc7_2 7 | |
0f2d19dd JB |
301 | |
302 | ||
303 | /* | |
304 | * Do not change the three bit tags. | |
305 | */ | |
306 | ||
307 | ||
d1ca2c64 | 308 | #define SCM_ITAG7(x) (127 & SCM_UNPACK (x)) |
445f675c DH |
309 | #define SCM_TYP7(x) (0x7f & SCM_CELL_TYPE (x)) |
310 | #define SCM_TYP7S(x) ((0x7f & ~2) & SCM_CELL_TYPE (x)) | |
0f2d19dd JB |
311 | |
312 | ||
445f675c DH |
313 | #define SCM_TYP16(x) (0xffff & SCM_CELL_TYPE (x)) |
314 | #define SCM_TYP16S(x) (0xfeff & SCM_CELL_TYPE (x)) | |
0f2d19dd | 315 | |
34d19ef6 | 316 | #define SCM_TYP16_PREDICATE(tag, x) (!SCM_IMP (x) && SCM_TYP16 (x) == (tag)) |
e841c3e0 | 317 | |
0f2d19dd JB |
318 | \f |
319 | ||
28b06554 | 320 | #define scm_tc7_symbol 5 |
e5aca4b5 | 321 | #define scm_tc7_variable 7 |
0f2d19dd JB |
322 | |
323 | /* couple */ | |
324 | #define scm_tc7_vector 13 | |
325 | #define scm_tc7_wvect 15 | |
326 | ||
0f2d19dd | 327 | #define scm_tc7_string 21 |
8c494e99 | 328 | /* free 23 */ |
0f2d19dd JB |
329 | |
330 | /* Many of the following should be turned | |
331 | * into structs or smobs. We need back some | |
332 | * of these 7 bit tags! | |
333 | */ | |
37581b11 | 334 | #define scm_tc7_pws 31 |
afe5177e GH |
335 | |
336 | #ifdef HAVE_ARRAYS | |
337 | #define scm_tc7_llvect 29 | |
338 | #define scm_tc7_uvect 37 | |
1660782e | 339 | /* free 39 */ |
0f2d19dd JB |
340 | #define scm_tc7_fvect 45 |
341 | #define scm_tc7_dvect 47 | |
342 | #define scm_tc7_cvect 53 | |
343 | #define scm_tc7_svect 55 | |
0f2d19dd JB |
344 | #define scm_tc7_bvect 71 |
345 | #define scm_tc7_byvect 77 | |
346 | #define scm_tc7_ivect 79 | |
afe5177e GH |
347 | #endif |
348 | ||
5f144b10 | 349 | /* free 61 */ |
afe5177e GH |
350 | #define scm_tc7_cclo 63 |
351 | #define scm_tc7_rpsubr 69 | |
0f2d19dd JB |
352 | #define scm_tc7_subr_0 85 |
353 | #define scm_tc7_subr_1 87 | |
354 | #define scm_tc7_cxr 93 | |
355 | #define scm_tc7_subr_3 95 | |
356 | #define scm_tc7_subr_2 101 | |
357 | #define scm_tc7_asubr 103 | |
358 | #define scm_tc7_subr_1o 109 | |
359 | #define scm_tc7_subr_2o 111 | |
360 | #define scm_tc7_lsubr_2 117 | |
361 | #define scm_tc7_lsubr 119 | |
362 | ||
363 | ||
a98bddfd | 364 | /* There are 256 port subtypes. |
0f2d19dd JB |
365 | */ |
366 | #define scm_tc7_port 125 | |
367 | ||
0f2d19dd JB |
368 | |
369 | /* There are 256 smob subtypes. Here are the first four. | |
370 | */ | |
371 | ||
372 | #define scm_tc7_smob 127 /* DO NOT CHANGE [**] */ | |
373 | ||
374 | /* [**] If you change scm_tc7_smob, you must also change | |
375 | * the places it is hard coded in this file and possibly others. | |
376 | */ | |
377 | ||
378 | ||
ab256d39 JB |
379 | /* scm_tc_free_cell is also the 0th smob type. We place this |
380 | * in free cells to tell the conservative marker not to trace it. | |
0f2d19dd | 381 | */ |
8c921d5c | 382 | #define scm_tc_free_cell (scm_tc7_smob + 0 * 256L) |
0f2d19dd | 383 | |
8c921d5c | 384 | /* Smob type 1 to 3 (note the dependency on the predicate SCM_NUMP) |
0f2d19dd | 385 | */ |
8c921d5c DH |
386 | #define scm_tc16_big (scm_tc7_smob + 1 * 256L) |
387 | #define scm_tc16_real (scm_tc7_smob + 2 * 256L) | |
388 | #define scm_tc16_complex (scm_tc7_smob + 3 * 256L) | |
0f2d19dd | 389 | |
0f2d19dd | 390 | \f |
8ce94504 | 391 | /* {Immediate Values} |
0f2d19dd JB |
392 | */ |
393 | ||
394 | enum scm_tags | |
395 | { | |
396 | scm_tc8_char = 0xf4, | |
4816f615 | 397 | scm_tc8_iloc = 0xfc |
0f2d19dd JB |
398 | }; |
399 | ||
f1267706 MD |
400 | #define SCM_ITAG8(X) (SCM_UNPACK (X) & 0xff) |
401 | #define SCM_MAKE_ITAG8(X, TAG) SCM_PACK (((X) << 8) + TAG) | |
402 | #define SCM_ITAG8_DATA(X) (SCM_UNPACK (X) >> 8) | |
0f2d19dd JB |
403 | |
404 | ||
405 | \f | |
406 | /* Immediate Symbols, Special Symbols, Flags (various constants). | |
407 | */ | |
408 | ||
409 | /* SCM_ISYMP tests for ISPCSYM and ISYM */ | |
f1267706 | 410 | #define SCM_ISYMP(n) ((0x187 & SCM_UNPACK (n)) == 4) |
0f2d19dd JB |
411 | |
412 | /* SCM_IFLAGP tests for ISPCSYM, ISYM and IFLAG */ | |
f1267706 MD |
413 | #define SCM_IFLAGP(n) ((0x87 & SCM_UNPACK (n)) == 4) |
414 | #define SCM_ISYMNUM(n) (SCM_UNPACK (n) >> 9) | |
76189127 | 415 | #define SCM_ISYMCHARS(n) (scm_isymnames[SCM_ISYMNUM (n)]) |
f1267706 MD |
416 | #define SCM_MAKSPCSYM(n) SCM_PACK (((n) << 9) + ((n) << 3) + 4L) |
417 | #define SCM_MAKISYM(n) SCM_PACK (((n) << 9) + 0x74L) | |
418 | #define SCM_MAKIFLAG(n) SCM_PACK (((n) << 9) + 0x174L) | |
0f2d19dd | 419 | |
33b001fd | 420 | SCM_API char *scm_isymnames[]; /* defined in print.c */ |
29ff38c4 | 421 | |
8ce94504 | 422 | /* This table must agree with the declarations |
0f2d19dd JB |
423 | * in repl.c: {Names of immediate symbols}. |
424 | * | |
425 | * These are used only in eval but their values | |
426 | * have to be allocated here. | |
427 | * | |
428 | */ | |
429 | ||
76189127 MD |
430 | #define SCM_IM_AND SCM_MAKSPCSYM (0) |
431 | #define SCM_IM_BEGIN SCM_MAKSPCSYM (1) | |
432 | #define SCM_IM_CASE SCM_MAKSPCSYM (2) | |
433 | #define SCM_IM_COND SCM_MAKSPCSYM (3) | |
434 | #define SCM_IM_DO SCM_MAKSPCSYM (4) | |
435 | #define SCM_IM_IF SCM_MAKSPCSYM (5) | |
436 | #define SCM_IM_LAMBDA SCM_MAKSPCSYM (6) | |
437 | #define SCM_IM_LET SCM_MAKSPCSYM (7) | |
438 | #define SCM_IM_LETSTAR SCM_MAKSPCSYM (8) | |
439 | #define SCM_IM_LETREC SCM_MAKSPCSYM (9) | |
440 | #define SCM_IM_OR SCM_MAKSPCSYM (10) | |
441 | #define SCM_IM_QUOTE SCM_MAKSPCSYM (11) | |
442 | #define SCM_IM_SET_X SCM_MAKSPCSYM (12) | |
443 | #define SCM_IM_DEFINE SCM_MAKSPCSYM (13) | |
444 | #define SCM_IM_APPLY SCM_MAKISYM (14) | |
445 | #define SCM_IM_CONT SCM_MAKISYM (15) | |
446 | #define SCM_BOOL_F SCM_MAKIFLAG (16) | |
447 | #define SCM_BOOL_T SCM_MAKIFLAG (17) | |
448 | #define SCM_UNDEFINED SCM_MAKIFLAG (18) | |
449 | #define SCM_EOF_VAL SCM_MAKIFLAG (19) | |
450 | #define SCM_EOL SCM_MAKIFLAG (20) | |
451 | #define SCM_UNSPECIFIED SCM_MAKIFLAG (21) | |
452 | #define SCM_IM_DISPATCH SCM_MAKISYM (22) | |
453 | #define SCM_IM_SLOT_REF SCM_MAKISYM (23) | |
454 | #define SCM_IM_SLOT_SET_X SCM_MAKISYM (24) | |
0f2d19dd | 455 | |
159500fb MD |
456 | /* Multi-language support */ |
457 | ||
76189127 | 458 | #define SCM_IM_NIL_COND SCM_MAKISYM (25) |
c96d76b8 | 459 | #define SCM_IM_BIND SCM_MAKISYM (26) |
159500fb | 460 | |
c96d76b8 | 461 | #define SCM_IM_DELAY SCM_MAKISYM (27) |
28d52ebb MD |
462 | #define SCM_IM_FUTURE SCM_MAKISYM (28) |
463 | #define SCM_IM_CALL_WITH_VALUES SCM_MAKISYM (29) | |
0f2d19dd | 464 | |
5623a9b4 MD |
465 | /* When a variable is unbound this is marked by the SCM_UNDEFINED |
466 | * value. The following is an unbound value which can be handled on | |
467 | * the Scheme level, i.e., it can be stored in and retrieved from a | |
468 | * Scheme variable. This value is only intended to mark an unbound | |
469 | * slot in GOOPS. It is needed now, but we should probably rewrite | |
470 | * the code which handles this value in C so that SCM_UNDEFINED can be | |
471 | * used instead. It is not ideal to let this kind of unique and | |
472 | * strange values loose on the Scheme level. | |
473 | */ | |
28d52ebb | 474 | #define SCM_UNBOUND SCM_MAKIFLAG (30) |
5623a9b4 | 475 | |
fbd485ba | 476 | #define SCM_UNBNDP(x) (SCM_EQ_P ((x), SCM_UNDEFINED)) |
0f2d19dd | 477 | |
c96d76b8 | 478 | /* The Elisp nil value. */ |
28d52ebb | 479 | #define SCM_ELISP_NIL SCM_MAKIFLAG (31) |
c96d76b8 | 480 | |
0f2d19dd JB |
481 | \f |
482 | ||
904a077d | 483 | /* Dispatching aids: |
0f2d19dd | 484 | |
904a077d MV |
485 | When switching on SCM_TYP7 of a SCM value, use these fake case |
486 | labels to catch types that use fewer than 7 bits for tagging. */ | |
0f2d19dd | 487 | |
8ce94504 | 488 | /* For cons pairs with immediate values in the CAR |
0f2d19dd JB |
489 | */ |
490 | ||
491 | #define scm_tcs_cons_imcar 2:case 4:case 6:case 10:\ | |
492 | case 12:case 14:case 18:case 20:\ | |
493 | case 22:case 26:case 28:case 30:\ | |
494 | case 34:case 36:case 38:case 42:\ | |
495 | case 44:case 46:case 50:case 52:\ | |
496 | case 54:case 58:case 60:case 62:\ | |
497 | case 66:case 68:case 70:case 74:\ | |
498 | case 76:case 78:case 82:case 84:\ | |
499 | case 86:case 90:case 92:case 94:\ | |
500 | case 98:case 100:case 102:case 106:\ | |
501 | case 108:case 110:case 114:case 116:\ | |
502 | case 118:case 122:case 124:case 126 | |
503 | ||
504 | /* For cons pairs with non-immediate values in the SCM_CAR | |
505 | */ | |
506 | #define scm_tcs_cons_nimcar 0:case 8:case 16:case 24:\ | |
507 | case 32:case 40:case 48:case 56:\ | |
508 | case 64:case 72:case 80:case 88:\ | |
509 | case 96:case 104:case 112:case 120 | |
510 | ||
904a077d | 511 | /* For structs |
0f2d19dd | 512 | */ |
904a077d | 513 | #define scm_tcs_struct 1:case 9:case 17:case 25:\ |
0f2d19dd JB |
514 | case 33:case 41:case 49:case 57:\ |
515 | case 65:case 73:case 81:case 89:\ | |
516 | case 97:case 105:case 113:case 121 | |
517 | ||
904a077d MV |
518 | /* For closures |
519 | */ | |
0f2d19dd JB |
520 | #define scm_tcs_closures 3:case 11:case 19:case 27:\ |
521 | case 35:case 43:case 51:case 59:\ | |
522 | case 67:case 75:case 83:case 91:\ | |
523 | case 99:case 107:case 115:case 123 | |
524 | ||
904a077d MV |
525 | /* For subrs |
526 | */ | |
0f2d19dd JB |
527 | #define scm_tcs_subrs scm_tc7_asubr:case scm_tc7_subr_0:case scm_tc7_subr_1:case scm_tc7_cxr:\ |
528 | case scm_tc7_subr_3:case scm_tc7_subr_2:case scm_tc7_rpsubr:case scm_tc7_subr_1o:\ | |
529 | case scm_tc7_subr_2o:case scm_tc7_lsubr_2:case scm_tc7_lsubr | |
530 | ||
f5f2dcff DH |
531 | \f |
532 | ||
8c494e99 | 533 | #if (SCM_ENABLE_DEPRECATED == 1) |
22a52da1 | 534 | |
228a24ef | 535 | #define SCM_CELLP(x) (((sizeof (scm_t_cell) - 1) & SCM_UNPACK (x)) == 0) |
8c494e99 | 536 | #define SCM_NCELLP(x) (!SCM_CELLP (x)) |
28b06554 | 537 | |
8c494e99 | 538 | #endif |
f5f2dcff | 539 | |
22a52da1 | 540 | #endif /* SCM_TAGS_H */ |
89e00824 ML |
541 | |
542 | /* | |
543 | Local Variables: | |
544 | c-file-style: "gnu" | |
545 | End: | |
546 | */ |