Commit | Line | Data |
---|---|---|
0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef TAGSH | |
4 | #define TAGSH | |
e282f286 | 5 | /* Copyright (C) 1995, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. |
8ce94504 | 6 | * |
0f2d19dd JB |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
8ce94504 | 11 | * |
0f2d19dd JB |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
8ce94504 | 16 | * |
0f2d19dd JB |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
45 | |
46 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
47 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
48 | ||
0f2d19dd JB |
49 | \f |
50 | ||
8ce94504 | 51 | /** This file defines the format of SCM values and cons pairs. |
0f2d19dd JB |
52 | ** It is here that tag bits are assigned for various purposes. |
53 | **/ | |
54 | ||
55 | \f | |
56 | ||
8d3356e7 | 57 | /* #define SCM_VOIDP_TEST */ |
c209c88e | 58 | |
0f2d19dd JB |
59 | /* In the beginning was the Word: |
60 | */ | |
4d45e7b6 | 61 | typedef long scm_bits_t; |
8d3356e7 DH |
62 | |
63 | /* But as external interface, we use SCM, which may, according to the desired | |
64 | * level of type checking, be defined in several ways: | |
65 | */ | |
56100716 | 66 | #if (SCM_DEBUG_TYPING_STRICTNESS == 1) |
8d3356e7 DH |
67 | typedef union { struct { scm_bits_t n; } n; } SCM; |
68 | static SCM scm_pack(scm_bits_t b) { SCM s; s.n.n = b; return s; } | |
69 | #define SCM_UNPACK(x) ((x).n.n) | |
54778cd3 | 70 | #define SCM_PACK(x) (scm_pack ((scm_bits_t) (x))) |
8d3356e7 DH |
71 | #elif defined (SCM_VOIDP_TEST) |
72 | /* This is the default, which provides an intermediate level of compile time | |
73 | * type checking while still resulting in very efficient code. | |
c209c88e | 74 | */ |
8d3356e7 DH |
75 | typedef void * SCM; |
76 | #define SCM_UNPACK(x) ((scm_bits_t) (x)) | |
77 | #define SCM_PACK(x) ((SCM) (x)) | |
c209c88e | 78 | #else |
8d3356e7 DH |
79 | /* This should be used as a fall back solution for machines on which casting |
80 | * to a pointer may lead to loss of bit information, e. g. in the three least | |
81 | * significant bits. | |
82 | */ | |
83 | typedef scm_bits_t SCM; | |
84 | #define SCM_UNPACK(x) (x) | |
54778cd3 | 85 | #define SCM_PACK(x) ((scm_bits_t) (x)) |
c209c88e | 86 | #endif |
0f2d19dd | 87 | |
8d3356e7 DH |
88 | |
89 | /* SCM values can not be compared by using the operator ==. Use the following | |
90 | * macro instead, which is the equivalent of the scheme predicate 'eq?'. | |
91 | */ | |
92 | #define SCM_EQ_P(x, y) (SCM_UNPACK (x) == SCM_UNPACK (y)) | |
93 | ||
0f2d19dd | 94 | \f |
2549a709 | 95 | |
0f2d19dd JB |
96 | /* SCM variables can contain: |
97 | * | |
98 | * Non-objects -- meaning that the tag-related macros don't apply to them | |
99 | * in the usual way. | |
100 | * | |
101 | * Immediates -- meaning that the variable contains an entire Scheme object. | |
102 | * | |
3c205827 JB |
103 | * Non-immediates -- meaning that the variable holds a (possibly |
104 | * tagged) pointer into the cons pair heap. | |
105 | * | |
106 | * Non-objects are distinguished from other values by careful coding | |
107 | * only (i.e., programmers must keep track of any SCM variables they | |
108 | * create that don't contain ordinary scheme values). | |
109 | * | |
110 | * All immediates and non-immediates must have a 0 in bit 0. Only | |
111 | * non-object values can have a 1 in bit 0. In some cases, bit 0 of a | |
112 | * word in the heap is used for the GC tag so during garbage | |
113 | * collection, that bit might be 1 even in an immediate or | |
114 | * non-immediate value. In other cases, bit 0 of a word in the heap | |
115 | * is used to tag a pointer to a GLOC (VM global variable address) or | |
116 | * the header of a struct. But whenever an SCM variable holds a | |
117 | * normal Scheme value, bit 0 is 0. | |
0f2d19dd JB |
118 | * |
119 | * Immediates and non-immediates are distinguished by bits two and four. | |
120 | * Immediate values must have a 1 in at least one of those bits. Does | |
c6c790ed | 121 | * this (or any other detail of tagging) seem arbitrary? Try changing it! |
0f2d19dd | 122 | * (Not always impossible but it is fair to say that many details of tags |
3c205827 | 123 | * are mutually dependent). */ |
0f2d19dd | 124 | |
f1267706 | 125 | #define SCM_IMP(x) (6 & SCM_UNPACK (x)) |
76189127 | 126 | #define SCM_NIMP(x) (!SCM_IMP (x)) |
0f2d19dd JB |
127 | |
128 | /* Here is a summary of tagging in SCM values as they might occur in | |
8ce94504 | 129 | * SCM variables or in the heap. |
0f2d19dd JB |
130 | * |
131 | * low bits meaning | |
132 | * | |
8ce94504 | 133 | * |
0f2d19dd JB |
134 | * 0 Most objects except... |
135 | * 1 ...glocs and structs (this tag valid only in a SCM_CAR or | |
136 | * in the header of a struct's data). | |
137 | * | |
138 | * 00 heap addresses and many immediates (not integers) | |
139 | * 01 glocs/structs, some tc7_ codes | |
140 | * 10 immediate integers | |
141 | * 11 various tc7_ codes including, tc16_ codes. | |
142 | * | |
143 | * | |
144 | * 000 heap address | |
145 | * 001 glocs/structs | |
146 | * 010 integer | |
147 | * 011 closure | |
148 | * 100 immediates | |
149 | * 101 tc7_ | |
150 | * 110 integer | |
151 | * 111 tc7_ | |
152 | * | |
153 | * | |
154 | * 100 --- IMMEDIATES | |
155 | * | |
156 | * Looking at the seven final bits of an immediate: | |
8ce94504 | 157 | * |
0f2d19dd JB |
158 | * 0000-100 short instruction |
159 | * 0001-100 short instruction | |
160 | * 0010-100 short instruction | |
161 | * 0011-100 short instruction | |
162 | * 0100-100 short instruction | |
163 | * 0101-100 short instruction | |
164 | * 0110-100 various immediates and long instructions | |
165 | * 0111-100 short instruction | |
166 | * 1000-100 short instruction | |
167 | * 1001-100 short instruction | |
168 | * 1010-100 short instruction | |
169 | * 1011-100 short instruction | |
170 | * 1100-100 short instruction | |
171 | * 1101-100 short instruction | |
172 | * 1110-100 immediate characters | |
173 | * 1111-100 ilocs | |
174 | * | |
8ce94504 | 175 | * Some of the 0110100 immediates are long instructions (they dispatch |
0f2d19dd JB |
176 | * in two steps compared to one step for a short instruction). |
177 | * The two steps are, (1) dispatch on 7 bits to the long instruction | |
178 | * handler, (2) dispatch on 7 additional bits. | |
179 | * | |
180 | * One way to think of it is that there are 128 short instructions, | |
181 | * with the 13 immediates above being some of the most interesting. | |
182 | * | |
183 | * Also noteworthy are the groups of 16 7-bit instructions implied by | |
184 | * some of the 3-bit tags. For example, closure references consist | |
185 | * of an 8-bit aligned address tagged with 011. There are 16 identical 7-bit | |
186 | * instructions, all ending 011, which are invoked by evaluating closures. | |
187 | * | |
188 | * In other words, if you hand the evaluator a closure, the evaluator | |
189 | * treats the closure as a graph of virtual machine instructions. | |
190 | * A closure is a pair with a pointer to the body of the procedure | |
191 | * in the CDR and a pointer to the environment of the closure in the CAR. | |
192 | * The environment pointer is tagged 011 which implies that the least | |
193 | * significant 7 bits of the environment pointer also happen to be | |
194 | * a virtual machine instruction we could call "SELF" (for self-evaluating | |
195 | * object). | |
196 | * | |
197 | * A less trivial example are the 16 instructions ending 000. If those | |
198 | * bits tag the CAR of a pair, then evidently the pair is an ordinary | |
199 | * cons pair and should be evaluated as a procedure application. The sixteen, | |
200 | * 7-bit 000 instructions are all "NORMAL-APPLY" (Things get trickier. | |
201 | * For example, if the CAR of a procedure application is a symbol, the NORMAL-APPLY | |
202 | * instruction will, as a side effect, overwrite that CAR with a new instruction | |
203 | * that contains a cached address for the variable named by the symbol.) | |
204 | * | |
205 | * Here is a summary of tags in the CAR of a non-immediate: | |
206 | * | |
207 | * HEAP CELL: G=gc_mark; 1 during mark, 0 other times. | |
208 | * | |
209 | * cons ..........SCM car..............0 ...........SCM cdr.............G | |
210 | * gloc ..........SCM vcell..........001 ...........SCM cdr.............G | |
211 | * struct ..........void * type........001 ...........void * data.........G | |
212 | * closure ..........SCM code...........011 ...........SCM env.............G | |
c2cb2500 | 213 | * tc7 .........long length....Gxxxx1S1 ..........void *data............ |
0f2d19dd JB |
214 | * |
215 | * | |
216 | * | |
217 | * 101 & 111 --- tc7_ types | |
218 | * | |
8ce94504 JB |
219 | * tc7_tags are 7 bit tags ending in 1x1. These tags |
220 | * occur only in the CAR of heap cells, and have the | |
221 | * handy property that all bits of the CAR above the | |
222 | * bottom eight can be used to store a length, thus | |
223 | * saving a word in the body itself. Thus, we use them | |
224 | * for strings, symbols, and vectors (among other | |
225 | * things). | |
0f2d19dd JB |
226 | * |
227 | * SCM_LENGTH returns the bits in "length" (see the diagram). | |
228 | * SCM_CHARS returns the data cast to "char *" | |
229 | * SCM_CDR returns the data cast to "SCM" | |
230 | * TYP7(X) returns bits 0...6 of SCM_CAR (X) | |
231 | * | |
232 | * For the interpretation of SCM_LENGTH and SCM_CHARS | |
233 | * that applies to a particular type, see the header file | |
234 | * for that type. | |
235 | * | |
8ce94504 | 236 | * Sometimes we choose the bottom seven bits carefully, |
c2cb2500 JB |
237 | * so that the 2-valued bit (called S bit) can be masked |
238 | * off to reveal a common type. | |
8ce94504 | 239 | * |
0f2d19dd | 240 | * TYP7S(X) returns TYP7, but masking out the option bit S. |
0f2d19dd | 241 | * |
c2cb2500 JB |
242 | * For example, all strings have 0010 in the 'xxxx' bits |
243 | * in the diagram above, the S bit says whether it's a | |
b7f3516f | 244 | * substring. |
8ce94504 | 245 | * |
0f2d19dd | 246 | * for example: |
b7f3516f | 247 | * S |
8ce94504 | 248 | * scm_tc7_string = G0010101 |
527da704 | 249 | * scm_tc7_substring = G0010111 |
8ce94504 | 250 | * |
c2cb2500 | 251 | * TYP7S turns both string tags into tc7_string; thus, |
b7f3516f | 252 | * testing TYP7S against tc7_string is a quick way to |
c2cb2500 | 253 | * test for any kind of string, shared or unshared. |
0f2d19dd | 254 | * |
0f2d19dd JB |
255 | * Some TC7 types are subdivided into 256 subtypes giving |
256 | * rise to the macros: | |
257 | * | |
258 | * TYP16 | |
259 | * TYP16S | |
260 | * GCTYP16 | |
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 | ||
445f675c DH |
283 | #define SCM_SLOPPY_CONSP(x) ((1 & SCM_CELL_TYPE (x)) == 0) |
284 | #define SCM_SLOPPY_NCONSP(x) (!SCM_SLOPPY_CONSP(x)) | |
76189127 | 285 | |
445f675c DH |
286 | #define SCM_CONSP(x) (!SCM_IMP (x) && SCM_SLOPPY_CONSP (x)) |
287 | #define SCM_NCONSP(x) (!SCM_CONSP (x)) | |
0f2d19dd JB |
288 | |
289 | ||
ee4274a6 MD |
290 | /* SCM_ECONSP should be used instead of SCM_CONSP at places where GLOCS |
291 | * can be expected to occur. | |
0f2d19dd | 292 | */ |
8f9da2f9 | 293 | #define SCM_ECONSP(x) \ |
445f675c | 294 | (!SCM_IMP (x) \ |
8f9da2f9 MD |
295 | && (SCM_SLOPPY_CONSP (x) \ |
296 | || (SCM_TYP3 (x) == 1 \ | |
451e591c DH |
297 | && (SCM_STRUCT_VTABLE_DATA (x)[scm_vtable_index_vcell] != 0)))) |
298 | #define SCM_NECONSP(x) (!SCM_ECONSP (x)) | |
0f2d19dd JB |
299 | |
300 | \f | |
301 | ||
445f675c DH |
302 | #define SCM_CELLP(x) (((sizeof (scm_cell) - 1) & SCM_UNPACK (x)) == 0) |
303 | #define SCM_NCELLP(x) (!SCM_CELLP (x)) | |
0f2d19dd | 304 | |
6ba93e5e | 305 | #define SCM_DOUBLE_CELLP(x) (((2 * sizeof (scm_cell) - 1) & SCM_UNPACK (x)) == 0) |
a00c95d9 | 306 | |
8ce94504 | 307 | /* See numbers.h for macros relating to immediate integers. |
0f2d19dd JB |
308 | */ |
309 | ||
f1267706 | 310 | #define SCM_ITAG3(x) (7 & SCM_UNPACK (x)) |
445f675c | 311 | #define SCM_TYP3(x) (7 & SCM_CELL_TYPE (x)) |
0f2d19dd JB |
312 | #define scm_tc3_cons 0 |
313 | #define scm_tc3_cons_gloc 1 | |
314 | #define scm_tc3_int_1 2 | |
c209c88e GB |
315 | #define scm_tc3_closure 3 |
316 | #define scm_tc3_imm24 4 | |
317 | #define scm_tc3_tc7_1 5 | |
318 | #define scm_tc3_int_2 6 | |
319 | #define scm_tc3_tc7_2 7 | |
0f2d19dd JB |
320 | |
321 | ||
322 | /* | |
323 | * Do not change the three bit tags. | |
324 | */ | |
325 | ||
326 | ||
445f675c DH |
327 | #define SCM_TYP7(x) (0x7f & SCM_CELL_TYPE (x)) |
328 | #define SCM_TYP7S(x) ((0x7f & ~2) & SCM_CELL_TYPE (x)) | |
0f2d19dd JB |
329 | |
330 | ||
445f675c DH |
331 | #define SCM_TYP16(x) (0xffff & SCM_CELL_TYPE (x)) |
332 | #define SCM_TYP16S(x) (0xfeff & SCM_CELL_TYPE (x)) | |
333 | #define SCM_GCTYP16(x) (0xff7f & SCM_CELL_TYPE (x)) | |
0f2d19dd JB |
334 | |
335 | ||
336 | ||
337 | /* Testing and Changing GC Marks in Various Standard Positions | |
338 | */ | |
76a369d9 | 339 | #define SCM_GCCDR(x) SCM_PACK(~1L & SCM_UNPACK (SCM_CDR (x))) |
f1267706 | 340 | #define SCM_GCMARKP(x) (1 & SCM_UNPACK (SCM_CDR (x))) |
445f675c | 341 | #define SCM_GC8MARKP(x) (0x80 & SCM_CELL_TYPE (x)) |
76189127 | 342 | #define SCM_SETGCMARK(x) SCM_SETOR_CDR (x, 1) |
898a256f MD |
343 | #define SCM_CLRGCMARK(x) SCM_SETAND_CDR (x, ~1L) |
344 | #define SCM_SETGC8MARK(x) SCM_SETOR_CAR (x, 0x80) | |
345 | #define SCM_CLRGC8MARK(x) SCM_SETAND_CAR (x, ~0x80L) | |
0f2d19dd JB |
346 | |
347 | ||
348 | \f | |
349 | ||
350 | /* couple */ | |
351 | #define scm_tc7_ssymbol 5 | |
352 | #define scm_tc7_msymbol 7 | |
353 | ||
354 | /* couple */ | |
355 | #define scm_tc7_vector 13 | |
356 | #define scm_tc7_wvect 15 | |
357 | ||
8a6d7c7c | 358 | /* couple */ |
0f2d19dd | 359 | #define scm_tc7_string 21 |
527da704 | 360 | #define scm_tc7_substring 23 |
0f2d19dd JB |
361 | |
362 | /* Many of the following should be turned | |
363 | * into structs or smobs. We need back some | |
364 | * of these 7 bit tags! | |
365 | */ | |
37581b11 | 366 | #define scm_tc7_pws 31 |
0f2d19dd | 367 | #define scm_tc7_lvector 39 |
afe5177e GH |
368 | |
369 | #ifdef HAVE_ARRAYS | |
370 | #define scm_tc7_llvect 29 | |
371 | #define scm_tc7_uvect 37 | |
0f2d19dd JB |
372 | #define scm_tc7_fvect 45 |
373 | #define scm_tc7_dvect 47 | |
374 | #define scm_tc7_cvect 53 | |
375 | #define scm_tc7_svect 55 | |
0f2d19dd JB |
376 | #define scm_tc7_bvect 71 |
377 | #define scm_tc7_byvect 77 | |
378 | #define scm_tc7_ivect 79 | |
afe5177e GH |
379 | #endif |
380 | ||
381 | #define scm_tc7_contin 61 | |
382 | #define scm_tc7_cclo 63 | |
383 | #define scm_tc7_rpsubr 69 | |
0f2d19dd JB |
384 | #define scm_tc7_subr_0 85 |
385 | #define scm_tc7_subr_1 87 | |
386 | #define scm_tc7_cxr 93 | |
387 | #define scm_tc7_subr_3 95 | |
388 | #define scm_tc7_subr_2 101 | |
389 | #define scm_tc7_asubr 103 | |
390 | #define scm_tc7_subr_1o 109 | |
391 | #define scm_tc7_subr_2o 111 | |
392 | #define scm_tc7_lsubr_2 117 | |
393 | #define scm_tc7_lsubr 119 | |
394 | ||
395 | ||
ee149d03 | 396 | /* There are 256 port subtypes. Here are the first few. |
0f2d19dd JB |
397 | * These must agree with the init function in ports.c |
398 | */ | |
399 | #define scm_tc7_port 125 | |
400 | ||
76189127 | 401 | #define scm_tc16_fport (scm_tc7_port + 0 * 256L) |
ee149d03 | 402 | /* scm_tc16_pipe was here. */ |
76189127 MD |
403 | #define scm_tc16_strport (scm_tc7_port + 2 * 256L) |
404 | #define scm_tc16_sfport (scm_tc7_port + 3 * 256L) | |
0f2d19dd JB |
405 | |
406 | ||
407 | /* There are 256 smob subtypes. Here are the first four. | |
408 | */ | |
409 | ||
410 | #define scm_tc7_smob 127 /* DO NOT CHANGE [**] */ | |
411 | ||
412 | /* [**] If you change scm_tc7_smob, you must also change | |
413 | * the places it is hard coded in this file and possibly others. | |
414 | */ | |
415 | ||
416 | ||
ab256d39 JB |
417 | /* scm_tc_free_cell is also the 0th smob type. We place this |
418 | * in free cells to tell the conservative marker not to trace it. | |
0f2d19dd | 419 | */ |
1b88bf8a | 420 | #define scm_tc_free_cell 0x007f |
0f2d19dd | 421 | |
1b88bf8a | 422 | /* Smob type 1 (note the dependency on the predicate SCM_NUMP) |
0f2d19dd | 423 | */ |
1b88bf8a | 424 | #define scm_tc16_big 0x017f |
0f2d19dd | 425 | |
8ce94504 | 426 | /* Smob types 2 and 3: |
0f2d19dd | 427 | */ |
1b88bf8a MD |
428 | #define scm_tc16_real 0x027f |
429 | #define scm_tc16_complex 0x037f | |
0f2d19dd | 430 | |
1b88bf8a | 431 | /* Smob type 4 allocated, but not initialized cells; |
1bbd0b84 GB |
432 | this is required to prevent the gc from hosing your cells if |
433 | you have to allocate while creating the cell*/ | |
1b88bf8a | 434 | #define scm_tc16_allocated 0x047f |
0f2d19dd JB |
435 | |
436 | \f | |
8ce94504 | 437 | /* {Immediate Values} |
0f2d19dd JB |
438 | */ |
439 | ||
440 | enum scm_tags | |
441 | { | |
442 | scm_tc8_char = 0xf4, | |
4816f615 | 443 | scm_tc8_iloc = 0xfc |
0f2d19dd JB |
444 | }; |
445 | ||
f1267706 MD |
446 | #define SCM_ITAG8(X) (SCM_UNPACK (X) & 0xff) |
447 | #define SCM_MAKE_ITAG8(X, TAG) SCM_PACK (((X) << 8) + TAG) | |
448 | #define SCM_ITAG8_DATA(X) (SCM_UNPACK (X) >> 8) | |
0f2d19dd JB |
449 | |
450 | ||
451 | \f | |
452 | /* Immediate Symbols, Special Symbols, Flags (various constants). | |
453 | */ | |
454 | ||
455 | /* SCM_ISYMP tests for ISPCSYM and ISYM */ | |
f1267706 | 456 | #define SCM_ISYMP(n) ((0x187 & SCM_UNPACK (n)) == 4) |
0f2d19dd JB |
457 | |
458 | /* SCM_IFLAGP tests for ISPCSYM, ISYM and IFLAG */ | |
f1267706 MD |
459 | #define SCM_IFLAGP(n) ((0x87 & SCM_UNPACK (n)) == 4) |
460 | #define SCM_ISYMNUM(n) (SCM_UNPACK (n) >> 9) | |
76189127 | 461 | #define SCM_ISYMCHARS(n) (scm_isymnames[SCM_ISYMNUM (n)]) |
f1267706 MD |
462 | #define SCM_MAKSPCSYM(n) SCM_PACK (((n) << 9) + ((n) << 3) + 4L) |
463 | #define SCM_MAKISYM(n) SCM_PACK (((n) << 9) + 0x74L) | |
464 | #define SCM_MAKIFLAG(n) SCM_PACK (((n) << 9) + 0x174L) | |
0f2d19dd | 465 | |
29ff38c4 MD |
466 | extern char *scm_isymnames[]; /* defined in print.c */ |
467 | ||
8ce94504 | 468 | /* This table must agree with the declarations |
0f2d19dd JB |
469 | * in repl.c: {Names of immediate symbols}. |
470 | * | |
471 | * These are used only in eval but their values | |
472 | * have to be allocated here. | |
473 | * | |
474 | */ | |
475 | ||
76189127 MD |
476 | #define SCM_IM_AND SCM_MAKSPCSYM (0) |
477 | #define SCM_IM_BEGIN SCM_MAKSPCSYM (1) | |
478 | #define SCM_IM_CASE SCM_MAKSPCSYM (2) | |
479 | #define SCM_IM_COND SCM_MAKSPCSYM (3) | |
480 | #define SCM_IM_DO SCM_MAKSPCSYM (4) | |
481 | #define SCM_IM_IF SCM_MAKSPCSYM (5) | |
482 | #define SCM_IM_LAMBDA SCM_MAKSPCSYM (6) | |
483 | #define SCM_IM_LET SCM_MAKSPCSYM (7) | |
484 | #define SCM_IM_LETSTAR SCM_MAKSPCSYM (8) | |
485 | #define SCM_IM_LETREC SCM_MAKSPCSYM (9) | |
486 | #define SCM_IM_OR SCM_MAKSPCSYM (10) | |
487 | #define SCM_IM_QUOTE SCM_MAKSPCSYM (11) | |
488 | #define SCM_IM_SET_X SCM_MAKSPCSYM (12) | |
489 | #define SCM_IM_DEFINE SCM_MAKSPCSYM (13) | |
490 | #define SCM_IM_APPLY SCM_MAKISYM (14) | |
491 | #define SCM_IM_CONT SCM_MAKISYM (15) | |
492 | #define SCM_BOOL_F SCM_MAKIFLAG (16) | |
493 | #define SCM_BOOL_T SCM_MAKIFLAG (17) | |
494 | #define SCM_UNDEFINED SCM_MAKIFLAG (18) | |
495 | #define SCM_EOF_VAL SCM_MAKIFLAG (19) | |
496 | #define SCM_EOL SCM_MAKIFLAG (20) | |
497 | #define SCM_UNSPECIFIED SCM_MAKIFLAG (21) | |
498 | #define SCM_IM_DISPATCH SCM_MAKISYM (22) | |
499 | #define SCM_IM_SLOT_REF SCM_MAKISYM (23) | |
500 | #define SCM_IM_SLOT_SET_X SCM_MAKISYM (24) | |
0f2d19dd | 501 | |
159500fb MD |
502 | /* Multi-language support */ |
503 | ||
76189127 MD |
504 | #define SCM_IM_NIL_COND SCM_MAKISYM (25) |
505 | #define SCM_IM_NIL_IFY SCM_MAKISYM (26) | |
506 | #define SCM_IM_T_IFY SCM_MAKISYM (27) | |
507 | #define SCM_IM_0_COND SCM_MAKISYM (28) | |
508 | #define SCM_IM_0_IFY SCM_MAKISYM (29) | |
509 | #define SCM_IM_1_IFY SCM_MAKISYM (30) | |
510 | #define SCM_IM_BIND SCM_MAKISYM (31) | |
159500fb | 511 | |
76189127 | 512 | #define SCM_IM_DELAY SCM_MAKISYM (32) |
0f2d19dd | 513 | |
5623a9b4 MD |
514 | /* When a variable is unbound this is marked by the SCM_UNDEFINED |
515 | * value. The following is an unbound value which can be handled on | |
516 | * the Scheme level, i.e., it can be stored in and retrieved from a | |
517 | * Scheme variable. This value is only intended to mark an unbound | |
518 | * slot in GOOPS. It is needed now, but we should probably rewrite | |
519 | * the code which handles this value in C so that SCM_UNDEFINED can be | |
520 | * used instead. It is not ideal to let this kind of unique and | |
521 | * strange values loose on the Scheme level. | |
522 | */ | |
76189127 | 523 | #define SCM_UNBOUND SCM_MAKIFLAG (33) |
5623a9b4 | 524 | |
fbd485ba | 525 | #define SCM_UNBNDP(x) (SCM_EQ_P ((x), SCM_UNDEFINED)) |
0f2d19dd JB |
526 | |
527 | \f | |
528 | ||
5623a9b4 | 529 | /* Dispatching aids: */ |
0f2d19dd JB |
530 | |
531 | ||
8ce94504 | 532 | /* For cons pairs with immediate values in the CAR |
0f2d19dd JB |
533 | */ |
534 | ||
535 | #define scm_tcs_cons_imcar 2:case 4:case 6:case 10:\ | |
536 | case 12:case 14:case 18:case 20:\ | |
537 | case 22:case 26:case 28:case 30:\ | |
538 | case 34:case 36:case 38:case 42:\ | |
539 | case 44:case 46:case 50:case 52:\ | |
540 | case 54:case 58:case 60:case 62:\ | |
541 | case 66:case 68:case 70:case 74:\ | |
542 | case 76:case 78:case 82:case 84:\ | |
543 | case 86:case 90:case 92:case 94:\ | |
544 | case 98:case 100:case 102:case 106:\ | |
545 | case 108:case 110:case 114:case 116:\ | |
546 | case 118:case 122:case 124:case 126 | |
547 | ||
548 | /* For cons pairs with non-immediate values in the SCM_CAR | |
549 | */ | |
550 | #define scm_tcs_cons_nimcar 0:case 8:case 16:case 24:\ | |
551 | case 32:case 40:case 48:case 56:\ | |
552 | case 64:case 72:case 80:case 88:\ | |
553 | case 96:case 104:case 112:case 120 | |
554 | ||
555 | /* A CONS_GLOC occurs in code. It's CAR is a pointer to the | |
556 | * CDR of a variable. The low order bits of the CAR are 001. | |
557 | * The CDR of the gloc is the code continuation. | |
558 | */ | |
559 | #define scm_tcs_cons_gloc 1:case 9:case 17:case 25:\ | |
560 | case 33:case 41:case 49:case 57:\ | |
561 | case 65:case 73:case 81:case 89:\ | |
562 | case 97:case 105:case 113:case 121 | |
563 | ||
564 | #define scm_tcs_closures 3:case 11:case 19:case 27:\ | |
565 | case 35:case 43:case 51:case 59:\ | |
566 | case 67:case 75:case 83:case 91:\ | |
567 | case 99:case 107:case 115:case 123 | |
568 | ||
569 | #define scm_tcs_subrs scm_tc7_asubr:case scm_tc7_subr_0:case scm_tc7_subr_1:case scm_tc7_cxr:\ | |
570 | case scm_tc7_subr_3:case scm_tc7_subr_2:case scm_tc7_rpsubr:case scm_tc7_subr_1o:\ | |
571 | case scm_tc7_subr_2o:case scm_tc7_lsubr_2:case scm_tc7_lsubr | |
572 | ||
573 | #define scm_tcs_symbols scm_tc7_ssymbol:case scm_tc7_msymbol | |
574 | ||
f5f2dcff DH |
575 | \f |
576 | ||
577 | #if (SCM_DEBUG_DEPRECATED == 0) | |
578 | ||
579 | #define scm_tc16_flo scm_tc16_real | |
580 | #define scm_tc_flo 0x017fL | |
581 | #define scm_tc_dblr scm_tc16_real | |
582 | #define scm_tc_dblc scm_tc16_complex | |
583 | ||
584 | #endif /* SCM_DEBUG_DEPRECATED == 0 */ | |
585 | ||
0f2d19dd | 586 | #endif /* TAGSH */ |
89e00824 ML |
587 | |
588 | /* | |
589 | Local Variables: | |
590 | c-file-style: "gnu" | |
591 | End: | |
592 | */ |