Commit | Line | Data |
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22a52da1 | 1 | /* Copyright (C) 1995-1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
e6e2e95a MD |
47 | #include <errno.h> |
48 | ||
a0599745 MD |
49 | #include "libguile/_scm.h" |
50 | #include "libguile/chars.h" | |
a002f1a2 | 51 | #include "libguile/continuations.h" |
a0599745 MD |
52 | #include "libguile/smob.h" |
53 | #include "libguile/eval.h" | |
54 | #include "libguile/macros.h" | |
55 | #include "libguile/procprop.h" | |
56 | #include "libguile/read.h" | |
57 | #include "libguile/weaks.h" | |
58 | #include "libguile/unif.h" | |
59 | #include "libguile/alist.h" | |
60 | #include "libguile/struct.h" | |
61 | #include "libguile/objects.h" | |
62 | #include "libguile/ports.h" | |
63 | #include "libguile/root.h" | |
64 | #include "libguile/strings.h" | |
65 | #include "libguile/strports.h" | |
66 | #include "libguile/vectors.h" | |
67 | ||
68 | #include "libguile/validate.h" | |
69 | #include "libguile/print.h" | |
0f2d19dd JB |
70 | \f |
71 | ||
72 | /* {Names of immediate symbols} | |
73 | * | |
74 | * This table must agree with the declarations in scm.h: {Immediate Symbols}. | |
75 | */ | |
76 | ||
77 | char *scm_isymnames[] = | |
78 | { | |
79 | /* This table must agree with the declarations */ | |
80 | "#@and", | |
81 | "#@begin", | |
82 | "#@case", | |
83 | "#@cond", | |
84 | "#@do", | |
85 | "#@if", | |
86 | "#@lambda", | |
87 | "#@let", | |
88 | "#@let*", | |
89 | "#@letrec", | |
90 | "#@or", | |
91 | "#@quote", | |
92 | "#@set!", | |
93 | "#@define", | |
94 | #if 0 | |
95 | "#@literal-variable-ref", | |
96 | "#@literal-variable-set!", | |
97 | #endif | |
98 | "#@apply", | |
99 | "#@call-with-current-continuation", | |
100 | ||
101 | /* user visible ISYMS */ | |
102 | /* other keywords */ | |
103 | /* Flags */ | |
104 | ||
105 | "#f", | |
106 | "#t", | |
107 | "#<undefined>", | |
108 | "#<eof>", | |
109 | "()", | |
4df91bd6 MD |
110 | "#<unspecified>", |
111 | "#@dispatch", | |
43c667e9 MD |
112 | "#@slot-ref", |
113 | "#@slot-set!", | |
159500fb | 114 | |
159500fb MD |
115 | /* Multi-language support */ |
116 | ||
117 | "#@nil-cond", | |
118 | "#@nil-ify", | |
119 | "#@t-ify", | |
120 | "#@0-cond", | |
121 | "#@0-ify", | |
122 | "#@1-ify", | |
ccd0e478 MD |
123 | "#@bind", |
124 | ||
5623a9b4 MD |
125 | "#@delay", |
126 | ||
127 | "#<unbound>" | |
0f2d19dd JB |
128 | }; |
129 | ||
1be6b49c | 130 | scm_option_t scm_print_opts[] = { |
726d810a DH |
131 | { SCM_OPTION_SCM, "closure-hook", SCM_UNPACK (SCM_BOOL_F), |
132 | "Hook for printing closures (should handle macros as well)." }, | |
84f6a34a MD |
133 | { SCM_OPTION_BOOLEAN, "source", 0, |
134 | "Print closures with source." } | |
e6e4c9af MD |
135 | }; |
136 | ||
a1ec6916 | 137 | SCM_DEFINE (scm_print_options, "print-options-interface", 0, 1, 0, |
1bbd0b84 | 138 | (SCM setting), |
71331188 | 139 | "Option interface for the print options. Instead of using\n" |
1dd05fd8 MG |
140 | "this procedure directly, use the procedures\n" |
141 | "@code{print-enable}, @code{print-disable}, @code{print-set!}\n" | |
142 | "and @code{print-options}.") | |
1bbd0b84 | 143 | #define FUNC_NAME s_scm_print_options |
e6e4c9af | 144 | { |
a51ea417 | 145 | SCM ans = scm_options (setting, |
b7ff98dd MD |
146 | scm_print_opts, |
147 | SCM_N_PRINT_OPTIONS, | |
1bbd0b84 | 148 | FUNC_NAME); |
e6e4c9af MD |
149 | return ans; |
150 | } | |
1bbd0b84 | 151 | #undef FUNC_NAME |
e6e4c9af | 152 | |
0f2d19dd JB |
153 | \f |
154 | /* {Printing of Scheme Objects} | |
155 | */ | |
156 | ||
a51ea417 | 157 | /* Detection of circular references. |
c62fbfe1 MD |
158 | * |
159 | * Due to other constraints in the implementation, this code has bad | |
5d46ebe3 MD |
160 | * time complexity (O (depth * N)), The printer code can be |
161 | * rewritten to be O(N). | |
a51ea417 | 162 | */ |
c62fbfe1 | 163 | #define PUSH_REF(pstate, obj) \ |
1bbd0b84 | 164 | do { \ |
c62fbfe1 MD |
165 | pstate->ref_stack[pstate->top++] = (obj); \ |
166 | if (pstate->top == pstate->ceiling) \ | |
167 | grow_ref_stack (pstate); \ | |
1bbd0b84 | 168 | } while(0) |
a51ea417 | 169 | |
c62fbfe1 | 170 | #define ENTER_NESTED_DATA(pstate, obj, label) \ |
1bbd0b84 | 171 | do { \ |
5ca6dc39 | 172 | register unsigned long i; \ |
c62fbfe1 | 173 | for (i = 0; i < pstate->top; ++i) \ |
230d095f | 174 | if (SCM_EQ_P (pstate->ref_stack[i], (obj))) \ |
c62fbfe1 MD |
175 | goto label; \ |
176 | if (pstate->fancyp) \ | |
177 | { \ | |
178 | if (pstate->top - pstate->list_offset >= pstate->level) \ | |
179 | { \ | |
b7f3516f | 180 | scm_putc ('#', port); \ |
c62fbfe1 MD |
181 | return; \ |
182 | } \ | |
183 | } \ | |
184 | PUSH_REF(pstate, obj); \ | |
1bbd0b84 | 185 | } while(0) |
a51ea417 | 186 | |
c62fbfe1 MD |
187 | #define EXIT_NESTED_DATA(pstate) { --pstate->top; } |
188 | ||
bb35f315 | 189 | SCM scm_print_state_vtable; |
c4f37e80 | 190 | |
bb35f315 | 191 | static SCM print_state_pool; |
c4f37e80 | 192 | |
f843a84c | 193 | #ifdef GUILE_DEBUG /* Used for debugging purposes */ |
1cc91f1b | 194 | |
3b3b36dd | 195 | SCM_DEFINE (scm_current_pstate, "current-pstate", 0, 0, 0, |
1bbd0b84 | 196 | (), |
5352393c MG |
197 | "Return the current-pstate -- the cadr of the\n" |
198 | "@code{print_state_pool}. @code{current-pstate} is only\n" | |
199 | "included in @code{--enable-guile-debug} builds.") | |
1bbd0b84 | 200 | #define FUNC_NAME s_scm_current_pstate |
c62fbfe1 | 201 | { |
a0adfbf0 MD |
202 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) |
203 | return SCM_CADR (print_state_pool); | |
204 | else | |
0a284a4e | 205 | return SCM_BOOL_F; |
c62fbfe1 | 206 | } |
1bbd0b84 GB |
207 | #undef FUNC_NAME |
208 | ||
c62fbfe1 MD |
209 | #endif |
210 | ||
211 | #define PSTATE_SIZE 50L | |
212 | ||
698c0295 | 213 | static SCM |
1bbd0b84 | 214 | make_print_state (void) |
698c0295 MD |
215 | { |
216 | SCM print_state = scm_make_struct (SCM_CAR (print_state_pool), /* pstate type */ | |
bf685b6d | 217 | SCM_INUM0, |
698c0295 | 218 | SCM_EOL); |
bf685b6d | 219 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
00ffa0e7 | 220 | pstate->ref_vect = scm_c_make_vector (PSTATE_SIZE, SCM_UNDEFINED); |
bf685b6d | 221 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); |
b17004b8 | 222 | pstate->ceiling = SCM_VECTOR_LENGTH (pstate->ref_vect); |
698c0295 MD |
223 | return print_state; |
224 | } | |
1cc91f1b | 225 | |
c62fbfe1 MD |
226 | SCM |
227 | scm_make_print_state () | |
c62fbfe1 | 228 | { |
230d095f | 229 | SCM answer = SCM_BOOL_F; |
698c0295 MD |
230 | |
231 | /* First try to allocate a print state from the pool */ | |
232 | SCM_DEFER_INTS; | |
a0adfbf0 | 233 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) |
698c0295 MD |
234 | { |
235 | answer = SCM_CADR (print_state_pool); | |
236 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
237 | } | |
238 | SCM_ALLOW_INTS; | |
239 | ||
230d095f | 240 | return SCM_FALSEP (answer) ? make_print_state () : answer; |
c62fbfe1 | 241 | } |
a51ea417 | 242 | |
698c0295 | 243 | void |
6e8d25a6 | 244 | scm_free_print_state (SCM print_state) |
698c0295 MD |
245 | { |
246 | SCM handle; | |
247 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
248 | /* Cleanup before returning print state to pool. | |
249 | * It is better to do it here. Doing it in scm_prin1 | |
250 | * would cost more since that function is called much more | |
251 | * often. | |
252 | */ | |
253 | pstate->fancyp = 0; | |
bb35f315 | 254 | pstate->revealed = 0; |
698c0295 MD |
255 | SCM_NEWCELL (handle); |
256 | SCM_DEFER_INTS; | |
22a52da1 DH |
257 | SCM_SET_CELL_WORD_0 (handle, print_state); |
258 | SCM_SET_CELL_WORD_1 (handle, SCM_CDR (print_state_pool)); | |
698c0295 MD |
259 | SCM_SETCDR (print_state_pool, handle); |
260 | SCM_ALLOW_INTS; | |
261 | } | |
1cc91f1b | 262 | |
a51ea417 | 263 | static void |
1bbd0b84 | 264 | grow_ref_stack (scm_print_state *pstate) |
a51ea417 | 265 | { |
b17004b8 DH |
266 | unsigned long int old_size = SCM_VECTOR_LENGTH (pstate->ref_vect); |
267 | SCM *old_elts = SCM_VELTS (pstate->ref_vect); | |
268 | unsigned long int new_size = 2 * pstate->ceiling; | |
00ffa0e7 | 269 | SCM new_vect = scm_c_make_vector (new_size, SCM_UNDEFINED); |
b17004b8 DH |
270 | SCM *new_elts = SCM_VELTS (new_vect); |
271 | unsigned long int i; | |
272 | ||
273 | for (i = 0; i != old_size; ++i) | |
274 | new_elts [i] = old_elts [i]; | |
275 | ||
276 | pstate->ref_vect = new_vect; | |
277 | pstate->ref_stack = new_elts; | |
bf685b6d | 278 | pstate->ceiling = new_size; |
a51ea417 MD |
279 | } |
280 | ||
1cc91f1b | 281 | |
a51ea417 | 282 | static void |
1bbd0b84 | 283 | print_circref (SCM port,scm_print_state *pstate,SCM ref) |
a51ea417 | 284 | { |
c014a02e ML |
285 | register long i; |
286 | long self = pstate->top - 1; | |
c62fbfe1 MD |
287 | i = pstate->top - 1; |
288 | if (SCM_CONSP (pstate->ref_stack[i])) | |
289 | { | |
290 | while (i > 0) | |
291 | { | |
292 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) | |
230d095f DH |
293 | || !SCM_EQ_P (SCM_CDR (pstate->ref_stack[i - 1]), |
294 | pstate->ref_stack[i])) | |
c62fbfe1 MD |
295 | break; |
296 | --i; | |
297 | } | |
298 | self = i; | |
299 | } | |
300 | for (i = pstate->top - 1; 1; --i) | |
230d095f | 301 | if (SCM_EQ_P (pstate->ref_stack[i], ref)) |
c62fbfe1 | 302 | break; |
b7f3516f | 303 | scm_putc ('#', port); |
c62fbfe1 | 304 | scm_intprint (i - self, 10, port); |
b7f3516f | 305 | scm_putc ('#', port); |
a51ea417 MD |
306 | } |
307 | ||
c62fbfe1 | 308 | /* Print generally. Handles both write and display according to PSTATE. |
0f2d19dd | 309 | */ |
8b840115 MD |
310 | SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); |
311 | SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); | |
1cc91f1b | 312 | |
726d810a | 313 | |
0f2d19dd | 314 | void |
1bbd0b84 | 315 | scm_iprin1 (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 316 | { |
0f2d19dd | 317 | taloop: |
54778cd3 | 318 | switch (SCM_ITAG3 (exp)) |
0f2d19dd | 319 | { |
e34f941a DH |
320 | case scm_tc3_closure: |
321 | case scm_tc3_tc7_1: | |
322 | case scm_tc3_tc7_2: | |
323 | /* These tc3 tags should never occur in an immediate value. They are | |
324 | * only used in cell types of non-immediates, i. e. the value returned | |
325 | * by SCM_CELL_TYPE (exp) can use these tags. | |
326 | */ | |
327 | scm_ipruk ("immediate", exp, port); | |
328 | break; | |
329 | case scm_tc3_int_1: | |
330 | case scm_tc3_int_2: | |
0f2d19dd JB |
331 | scm_intprint (SCM_INUM (exp), 10, port); |
332 | break; | |
e34f941a | 333 | case scm_tc3_imm24: |
7866a09b | 334 | if (SCM_CHARP (exp)) |
0f2d19dd | 335 | { |
e34f941a | 336 | long i = SCM_CHAR (exp); |
5ca6dc39 | 337 | |
b7f3516f TT |
338 | if (SCM_WRITINGP (pstate)) |
339 | { | |
340 | scm_puts ("#\\", port); | |
341 | if ((i >= 0) && (i <= ' ') && scm_charnames[i]) | |
342 | scm_puts (scm_charnames[i], port); | |
57b74422 GH |
343 | #ifndef EBCDIC |
344 | else if (i == '\177') | |
345 | scm_puts (scm_charnames[scm_n_charnames - 1], port); | |
346 | #endif | |
b7f3516f TT |
347 | else if (i < 0 || i > '\177') |
348 | scm_intprint (i, 8, port); | |
349 | else | |
350 | scm_putc (i, port); | |
351 | } | |
352 | else | |
353 | scm_putc (i, port); | |
0f2d19dd | 354 | } |
a51ea417 | 355 | else if (SCM_IFLAGP (exp) |
5ca6dc39 | 356 | && ((size_t) SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
b7f3516f | 357 | scm_puts (SCM_ISYMCHARS (exp), port); |
0f2d19dd JB |
358 | else if (SCM_ILOCP (exp)) |
359 | { | |
b7f3516f | 360 | scm_puts ("#@", port); |
1be6b49c | 361 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); |
b7f3516f | 362 | scm_putc (SCM_ICDRP (exp) ? '-' : '+', port); |
1be6b49c | 363 | scm_intprint ((long) SCM_IDIST (exp), 10, port); |
0f2d19dd JB |
364 | } |
365 | else | |
e34f941a DH |
366 | { |
367 | /* unknown immediate value */ | |
368 | scm_ipruk ("immediate", exp, port); | |
369 | } | |
0f2d19dd | 370 | break; |
e34f941a | 371 | case scm_tc3_cons_gloc: |
0f2d19dd | 372 | /* gloc */ |
b7f3516f | 373 | scm_puts ("#@", port); |
86d31dfe MV |
374 | exp = scm_module_reverse_lookup (scm_current_module (), |
375 | SCM_GLOC_VAR (exp)); | |
0f2d19dd | 376 | goto taloop; |
e34f941a | 377 | case scm_tc3_cons: |
0f2d19dd JB |
378 | switch (SCM_TYP7 (exp)) |
379 | { | |
380 | case scm_tcs_cons_gloc: | |
381 | ||
fee7ef83 | 382 | if (SCM_STRUCT_VTABLE_DATA (exp) [scm_vtable_index_vcell] == 0) |
0f2d19dd | 383 | { |
c4f37e80 | 384 | ENTER_NESTED_DATA (pstate, exp, circref); |
8b840115 MD |
385 | if (SCM_OBJ_CLASS_FLAGS (exp) & SCM_CLASSF_GOOPS) |
386 | { | |
387 | SCM pwps, print = pstate->writingp ? g_write : g_display; | |
388 | if (!print) | |
389 | goto print_struct; | |
390 | SCM_NEWSMOB (pwps, | |
391 | scm_tc16_port_with_ps, | |
54778cd3 | 392 | SCM_UNPACK (scm_cons (port, pstate->handle))); |
8b840115 MD |
393 | scm_call_generic_2 (print, exp, pwps); |
394 | } | |
395 | else | |
396 | { | |
397 | print_struct: | |
398 | scm_print_struct (exp, port, pstate); | |
399 | } | |
c4f37e80 | 400 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
401 | break; |
402 | } | |
403 | ||
404 | case scm_tcs_cons_imcar: | |
405 | case scm_tcs_cons_nimcar: | |
c62fbfe1 MD |
406 | ENTER_NESTED_DATA (pstate, exp, circref); |
407 | scm_iprlist ("(", exp, ')', port, pstate); | |
408 | EXIT_NESTED_DATA (pstate); | |
a51ea417 MD |
409 | break; |
410 | circref: | |
c62fbfe1 | 411 | print_circref (port, pstate, exp); |
0f2d19dd JB |
412 | break; |
413 | case scm_tcs_closures: | |
bb35f315 MV |
414 | if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE)) |
415 | || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE, | |
77c25af7 | 416 | exp, port, pstate))) |
726d810a DH |
417 | { |
418 | SCM formals = SCM_CLOSURE_FORMALS (exp); | |
419 | scm_puts ("#<procedure", port); | |
420 | scm_putc (' ', port); | |
421 | scm_iprin1 (scm_procedure_name (exp), port, pstate); | |
422 | scm_putc (' ', port); | |
423 | if (SCM_PRINT_SOURCE_P) | |
424 | { | |
425 | SCM env = SCM_ENV (exp); | |
426 | SCM xenv = SCM_EXTEND_ENV (formals, SCM_EOL, env); | |
427 | SCM src = scm_unmemocopy (SCM_CODE (exp), xenv); | |
428 | ENTER_NESTED_DATA (pstate, exp, circref); | |
429 | scm_iprin1 (src, port, pstate); | |
430 | EXIT_NESTED_DATA (pstate); | |
431 | } | |
432 | else | |
433 | scm_iprin1 (formals, port, pstate); | |
b7f3516f | 434 | scm_putc ('>', port); |
726d810a | 435 | } |
0f2d19dd | 436 | break; |
0f2d19dd JB |
437 | case scm_tc7_substring: |
438 | case scm_tc7_string: | |
c62fbfe1 | 439 | if (SCM_WRITINGP (pstate)) |
0f2d19dd | 440 | { |
1be6b49c | 441 | size_t i; |
5ca6dc39 | 442 | |
b7f3516f | 443 | scm_putc ('"', port); |
d1ca2c64 | 444 | for (i = 0; i < SCM_STRING_LENGTH (exp); ++i) |
34f0f2b8 | 445 | switch (SCM_STRING_CHARS (exp)[i]) |
0f2d19dd | 446 | { |
dbef8851 | 447 | case '"': |
0f2d19dd | 448 | case '\\': |
b7f3516f | 449 | scm_putc ('\\', port); |
0f2d19dd | 450 | default: |
34f0f2b8 | 451 | scm_putc (SCM_STRING_CHARS (exp)[i], port); |
0f2d19dd | 452 | } |
b7f3516f | 453 | scm_putc ('"', port); |
0f2d19dd JB |
454 | break; |
455 | } | |
456 | else | |
34f0f2b8 | 457 | scm_lfwrite (SCM_STRING_CHARS (exp), SCM_STRING_LENGTH (exp), port); |
0f2d19dd | 458 | break; |
28b06554 | 459 | case scm_tc7_symbol: |
0f2d19dd | 460 | { |
1be6b49c ML |
461 | size_t pos; |
462 | size_t end; | |
463 | size_t len; | |
0f2d19dd JB |
464 | char * str; |
465 | int weird; | |
466 | int maybe_weird; | |
1be6b49c | 467 | size_t mw_pos = 0; |
0f2d19dd | 468 | |
b17004b8 | 469 | len = SCM_SYMBOL_LENGTH (exp); |
86c991c2 | 470 | str = SCM_SYMBOL_CHARS (exp); |
0f2d19dd JB |
471 | pos = 0; |
472 | weird = 0; | |
473 | maybe_weird = 0; | |
474 | ||
475 | if (len == 0) | |
b7f3516f | 476 | scm_lfwrite ("#{}#", 4, port); |
0f2d19dd JB |
477 | |
478 | for (end = pos; end < len; ++end) | |
479 | switch (str[end]) | |
480 | { | |
481 | #ifdef BRACKETS_AS_PARENS | |
482 | case '[': | |
483 | case ']': | |
484 | #endif | |
485 | case '(': | |
486 | case ')': | |
dbef8851 | 487 | case '"': |
0f2d19dd JB |
488 | case ';': |
489 | case SCM_WHITE_SPACES: | |
490 | case SCM_LINE_INCREMENTORS: | |
491 | weird_handler: | |
492 | if (maybe_weird) | |
493 | { | |
494 | end = mw_pos; | |
495 | maybe_weird = 0; | |
496 | } | |
497 | if (!weird) | |
498 | { | |
b7f3516f | 499 | scm_lfwrite ("#{", 2, port); |
0f2d19dd JB |
500 | weird = 1; |
501 | } | |
502 | if (pos < end) | |
503 | { | |
b7f3516f | 504 | scm_lfwrite (str + pos, end - pos, port); |
0f2d19dd JB |
505 | } |
506 | { | |
507 | char buf[2]; | |
508 | buf[0] = '\\'; | |
509 | buf[1] = str[end]; | |
b7f3516f | 510 | scm_lfwrite (buf, 2, port); |
0f2d19dd JB |
511 | } |
512 | pos = end + 1; | |
513 | break; | |
514 | case '\\': | |
515 | if (weird) | |
516 | goto weird_handler; | |
517 | if (!maybe_weird) | |
518 | { | |
519 | maybe_weird = 1; | |
520 | mw_pos = pos; | |
521 | } | |
522 | break; | |
523 | case '}': | |
524 | case '#': | |
525 | if (weird) | |
526 | goto weird_handler; | |
527 | break; | |
528 | default: | |
529 | break; | |
530 | } | |
531 | if (pos < end) | |
b7f3516f | 532 | scm_lfwrite (str + pos, end - pos, port); |
5d2b97cd | 533 | scm_remember_upto_here_1 (exp); |
0f2d19dd | 534 | if (weird) |
b7f3516f | 535 | scm_lfwrite ("}#", 2, port); |
0f2d19dd JB |
536 | break; |
537 | } | |
538 | case scm_tc7_wvect: | |
c62fbfe1 | 539 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd | 540 | if (SCM_IS_WHVEC (exp)) |
b7f3516f | 541 | scm_puts ("#wh(", port); |
0f2d19dd | 542 | else |
b7f3516f | 543 | scm_puts ("#w(", port); |
0f2d19dd JB |
544 | goto common_vector_printer; |
545 | ||
546 | case scm_tc7_vector: | |
c62fbfe1 | 547 | ENTER_NESTED_DATA (pstate, exp, circref); |
b7f3516f | 548 | scm_puts ("#(", port); |
0f2d19dd | 549 | common_vector_printer: |
9fbaf27c | 550 | { |
c014a02e ML |
551 | register long i; |
552 | long last = SCM_VECTOR_LENGTH (exp) - 1; | |
9fbaf27c | 553 | int cutp = 0; |
b17004b8 | 554 | if (pstate->fancyp && SCM_VECTOR_LENGTH (exp) > pstate->length) |
9fbaf27c MD |
555 | { |
556 | last = pstate->length - 1; | |
557 | cutp = 1; | |
558 | } | |
559 | for (i = 0; i < last; ++i) | |
560 | { | |
561 | /* CHECK_INTS; */ | |
562 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); | |
b7f3516f | 563 | scm_putc (' ', port); |
9fbaf27c MD |
564 | } |
565 | if (i == last) | |
566 | { | |
567 | /* CHECK_INTS; */ | |
568 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); | |
569 | } | |
570 | if (cutp) | |
b7f3516f TT |
571 | scm_puts (" ...", port); |
572 | scm_putc (')', port); | |
9fbaf27c | 573 | } |
c62fbfe1 | 574 | EXIT_NESTED_DATA (pstate); |
0f2d19dd | 575 | break; |
afe5177e | 576 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
577 | case scm_tc7_bvect: |
578 | case scm_tc7_byvect: | |
579 | case scm_tc7_svect: | |
580 | case scm_tc7_ivect: | |
581 | case scm_tc7_uvect: | |
582 | case scm_tc7_fvect: | |
583 | case scm_tc7_dvect: | |
584 | case scm_tc7_cvect: | |
5c11cc9d | 585 | #ifdef HAVE_LONG_LONGS |
0f2d19dd JB |
586 | case scm_tc7_llvect: |
587 | #endif | |
c62fbfe1 | 588 | scm_raprin1 (exp, port, pstate); |
0f2d19dd | 589 | break; |
afe5177e | 590 | #endif |
0f2d19dd | 591 | case scm_tcs_subrs: |
9de33deb MD |
592 | scm_puts (SCM_SUBR_GENERIC (exp) && *SCM_SUBR_GENERIC (exp) |
593 | ? "#<primitive-generic " | |
594 | : "#<primitive-procedure ", | |
595 | port); | |
a002f1a2 | 596 | scm_puts (SCM_SYMBOL_CHARS (SCM_SNAME (exp)), port); |
b7f3516f | 597 | scm_putc ('>', port); |
0f2d19dd JB |
598 | break; |
599 | #ifdef CCLO | |
600 | case scm_tc7_cclo: | |
56977059 MD |
601 | { |
602 | SCM proc = SCM_CCLO_SUBR (exp); | |
54778cd3 | 603 | if (SCM_EQ_P (proc, scm_f_gsubr_apply)) |
56977059 MD |
604 | { |
605 | /* Print gsubrs as primitives */ | |
c180dfd3 | 606 | SCM name = scm_procedure_name (exp); |
56977059 MD |
607 | scm_puts ("#<primitive-procedure", port); |
608 | if (SCM_NFALSEP (name)) | |
609 | { | |
610 | scm_putc (' ', port); | |
a002f1a2 | 611 | scm_puts (SCM_SYMBOL_CHARS (name), port); |
56977059 MD |
612 | } |
613 | } | |
614 | else | |
615 | { | |
616 | scm_puts ("#<compiled-closure ", port); | |
617 | scm_iprin1 (proc, port, pstate); | |
618 | } | |
619 | scm_putc ('>', port); | |
620 | } | |
0f2d19dd JB |
621 | break; |
622 | #endif | |
c180dfd3 MD |
623 | case scm_tc7_pws: |
624 | scm_puts ("#<procedure-with-setter", port); | |
625 | { | |
626 | SCM name = scm_procedure_name (exp); | |
627 | if (SCM_NFALSEP (name)) | |
628 | { | |
629 | scm_putc (' ', port); | |
b24b5e13 | 630 | scm_display (name, port); |
c180dfd3 MD |
631 | } |
632 | } | |
633 | scm_putc ('>', port); | |
634 | break; | |
0f2d19dd | 635 | case scm_tc7_port: |
5ca6dc39 JB |
636 | { |
637 | register long i = SCM_PTOBNUM (exp); | |
638 | if (i < scm_numptob | |
639 | && scm_ptobs[i].print | |
640 | && (scm_ptobs[i].print) (exp, port, pstate)) | |
a51ea417 | 641 | break; |
5ca6dc39 JB |
642 | goto punk; |
643 | } | |
644 | case scm_tc7_smob: | |
7a7f7c53 DH |
645 | ENTER_NESTED_DATA (pstate, exp, circref); |
646 | SCM_SMOB_DESCRIPTOR (exp).print (exp, port, pstate); | |
647 | EXIT_NESTED_DATA (pstate); | |
648 | break; | |
0f2d19dd | 649 | default: |
a51ea417 MD |
650 | punk: |
651 | scm_ipruk ("type", exp, port); | |
0f2d19dd JB |
652 | } |
653 | } | |
654 | } | |
655 | ||
c62fbfe1 MD |
656 | /* Print states are necessary for circular reference safe printing. |
657 | * They are also expensive to allocate. Therefore print states are | |
658 | * kept in a pool so that they can be reused. | |
659 | */ | |
1cc91f1b | 660 | |
bb35f315 MV |
661 | /* The PORT argument can also be a print-state/port pair, which will |
662 | * then be used instead of allocating a new print state. This is | |
663 | * useful for continuing a chain of print calls from Scheme. */ | |
664 | ||
a51ea417 | 665 | void |
1bbd0b84 | 666 | scm_prin1 (SCM exp, SCM port, int writingp) |
a51ea417 | 667 | { |
c4f37e80 MV |
668 | SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */ |
669 | SCM pstate_scm; | |
c62fbfe1 MD |
670 | scm_print_state *pstate; |
671 | ||
bb35f315 MV |
672 | /* If PORT is a print-state/port pair, use that. Else create a new |
673 | print-state. */ | |
c4f37e80 | 674 | |
0c95b57d | 675 | if (SCM_PORT_WITH_PS_P (port)) |
bb35f315 | 676 | { |
52235e71 MD |
677 | pstate_scm = SCM_PORT_WITH_PS_PS (port); |
678 | port = SCM_PORT_WITH_PS_PORT (port); | |
bb35f315 MV |
679 | } |
680 | else | |
c62fbfe1 | 681 | { |
c4f37e80 MV |
682 | /* First try to allocate a print state from the pool */ |
683 | SCM_DEFER_INTS; | |
684 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
685 | { | |
686 | handle = SCM_CDR (print_state_pool); | |
687 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
688 | } | |
689 | SCM_ALLOW_INTS; | |
54778cd3 | 690 | if (SCM_FALSEP (handle)) |
c4f37e80 MV |
691 | handle = scm_cons (make_print_state (), SCM_EOL); |
692 | pstate_scm = SCM_CAR (handle); | |
c62fbfe1 | 693 | } |
c62fbfe1 | 694 | |
c4f37e80 | 695 | pstate = SCM_PRINT_STATE (pstate_scm); |
c62fbfe1 MD |
696 | pstate->writingp = writingp; |
697 | scm_iprin1 (exp, port, pstate); | |
698 | ||
bb35f315 MV |
699 | /* Return print state to pool if it has been created above and |
700 | hasn't escaped to Scheme. */ | |
701 | ||
54778cd3 | 702 | if (!SCM_FALSEP (handle) && !pstate->revealed) |
c4f37e80 MV |
703 | { |
704 | SCM_DEFER_INTS; | |
705 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
706 | SCM_SETCDR (print_state_pool, handle); | |
707 | SCM_ALLOW_INTS; | |
708 | } | |
a51ea417 MD |
709 | } |
710 | ||
0f2d19dd JB |
711 | |
712 | /* Print an integer. | |
713 | */ | |
1cc91f1b | 714 | |
0f2d19dd | 715 | void |
1bbd0b84 | 716 | scm_intprint (long n, int radix, SCM port) |
0f2d19dd JB |
717 | { |
718 | char num_buf[SCM_INTBUFLEN]; | |
b7f3516f | 719 | scm_lfwrite (num_buf, scm_iint2str (n, radix, num_buf), port); |
0f2d19dd JB |
720 | } |
721 | ||
722 | /* Print an object of unrecognized type. | |
723 | */ | |
1cc91f1b | 724 | |
0f2d19dd | 725 | void |
1bbd0b84 | 726 | scm_ipruk (char *hdr, SCM ptr, SCM port) |
0f2d19dd | 727 | { |
b7f3516f TT |
728 | scm_puts ("#<unknown-", port); |
729 | scm_puts (hdr, port); | |
0f2d19dd JB |
730 | if (SCM_CELLP (ptr)) |
731 | { | |
b7f3516f | 732 | scm_puts (" (0x", port); |
54778cd3 | 733 | scm_intprint (SCM_CELL_WORD_0 (ptr), 16, port); |
b7f3516f | 734 | scm_puts (" . 0x", port); |
54778cd3 | 735 | scm_intprint (SCM_CELL_WORD_1 (ptr), 16, port); |
b7f3516f | 736 | scm_puts (") @", port); |
0f2d19dd | 737 | } |
b7f3516f | 738 | scm_puts (" 0x", port); |
54778cd3 | 739 | scm_intprint (SCM_UNPACK (ptr), 16, port); |
b7f3516f | 740 | scm_putc ('>', port); |
0f2d19dd JB |
741 | } |
742 | ||
1cc91f1b | 743 | |
22a52da1 DH |
744 | /* Print a list. The list may be either a list of ordinary data, or it may be |
745 | a list that represents code. Lists that represent code may contain gloc | |
746 | cells. | |
747 | */ | |
0f2d19dd | 748 | void |
1bbd0b84 | 749 | scm_iprlist (char *hdr,SCM exp,int tlr,SCM port,scm_print_state *pstate) |
0f2d19dd | 750 | { |
c62fbfe1 | 751 | register SCM hare, tortoise; |
c014a02e | 752 | long floor = pstate->top - 2; |
b7f3516f | 753 | scm_puts (hdr, port); |
0f2d19dd | 754 | /* CHECK_INTS; */ |
c62fbfe1 MD |
755 | if (pstate->fancyp) |
756 | goto fancy_printing; | |
757 | ||
758 | /* Run a hare and tortoise so that total time complexity will be | |
759 | O(depth * N) instead of O(N^2). */ | |
760 | hare = SCM_CDR (exp); | |
761 | tortoise = exp; | |
0c95b57d | 762 | while (SCM_ECONSP (hare)) |
c62fbfe1 | 763 | { |
54778cd3 | 764 | if (SCM_EQ_P (hare, tortoise)) |
c62fbfe1 MD |
765 | goto fancy_printing; |
766 | hare = SCM_CDR (hare); | |
2fab3faa | 767 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
c62fbfe1 MD |
768 | break; |
769 | hare = SCM_CDR (hare); | |
770 | tortoise = SCM_CDR (tortoise); | |
771 | } | |
772 | ||
773 | /* No cdr cycles intrinsic to this list */ | |
774 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
22a52da1 | 775 | for (exp = SCM_CDR (exp); SCM_ECONSP (exp); exp = SCM_CDR (exp)) |
0f2d19dd | 776 | { |
c014a02e | 777 | register long i; |
5ca6dc39 | 778 | |
c62fbfe1 | 779 | for (i = floor; i >= 0; --i) |
230d095f | 780 | if (SCM_EQ_P (pstate->ref_stack[i], exp)) |
c62fbfe1 MD |
781 | goto circref; |
782 | PUSH_REF (pstate, exp); | |
b7f3516f | 783 | scm_putc (' ', port); |
0f2d19dd | 784 | /* CHECK_INTS; */ |
c62fbfe1 | 785 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
0f2d19dd | 786 | } |
22a52da1 | 787 | if (!SCM_NULLP (exp)) |
0f2d19dd | 788 | { |
b7f3516f | 789 | scm_puts (" . ", port); |
c62fbfe1 | 790 | scm_iprin1 (exp, port, pstate); |
0f2d19dd | 791 | } |
c62fbfe1 | 792 | |
a51ea417 | 793 | end: |
b7f3516f | 794 | scm_putc (tlr, port); |
c62fbfe1 | 795 | pstate->top = floor + 2; |
a51ea417 | 796 | return; |
c62fbfe1 MD |
797 | |
798 | fancy_printing: | |
799 | { | |
c014a02e | 800 | long n = pstate->length; |
c62fbfe1 MD |
801 | |
802 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
803 | exp = SCM_CDR (exp); --n; | |
22a52da1 | 804 | for (; SCM_ECONSP (exp); exp = SCM_CDR (exp)) |
c62fbfe1 | 805 | { |
c014a02e | 806 | register unsigned long i; |
5ca6dc39 | 807 | |
c62fbfe1 | 808 | for (i = 0; i < pstate->top; ++i) |
230d095f | 809 | if (SCM_EQ_P (pstate->ref_stack[i], exp)) |
c62fbfe1 MD |
810 | goto fancy_circref; |
811 | if (pstate->fancyp) | |
812 | { | |
813 | if (n == 0) | |
814 | { | |
b7f3516f | 815 | scm_puts (" ...", port); |
c62fbfe1 MD |
816 | goto skip_tail; |
817 | } | |
818 | else | |
819 | --n; | |
820 | } | |
821 | PUSH_REF(pstate, exp); | |
822 | ++pstate->list_offset; | |
b7f3516f | 823 | scm_putc (' ', port); |
c62fbfe1 MD |
824 | /* CHECK_INTS; */ |
825 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
826 | } | |
827 | } | |
828 | if (SCM_NNULLP (exp)) | |
829 | { | |
b7f3516f | 830 | scm_puts (" . ", port); |
c62fbfe1 MD |
831 | scm_iprin1 (exp, port, pstate); |
832 | } | |
833 | skip_tail: | |
834 | pstate->list_offset -= pstate->top - floor - 2; | |
a51ea417 | 835 | goto end; |
a51ea417 | 836 | |
c62fbfe1 MD |
837 | fancy_circref: |
838 | pstate->list_offset -= pstate->top - floor - 2; | |
839 | ||
840 | circref: | |
b7f3516f | 841 | scm_puts (" . ", port); |
c62fbfe1 MD |
842 | print_circref (port, pstate, exp); |
843 | goto end; | |
0f2d19dd JB |
844 | } |
845 | ||
846 | \f | |
847 | ||
bb35f315 MV |
848 | int |
849 | scm_valid_oport_value_p (SCM val) | |
850 | { | |
368cf54d GB |
851 | return (SCM_OPOUTPORTP (val) |
852 | || (SCM_PORT_WITH_PS_P (val) | |
853 | && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val)))); | |
bb35f315 MV |
854 | } |
855 | ||
8b840115 | 856 | /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */ |
1cc91f1b | 857 | |
0f2d19dd | 858 | SCM |
1bbd0b84 | 859 | scm_write (SCM obj, SCM port) |
0f2d19dd JB |
860 | { |
861 | if (SCM_UNBNDP (port)) | |
862 | port = scm_cur_outp; | |
3eb7e6ee JB |
863 | |
864 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write); | |
bb35f315 | 865 | |
a51ea417 | 866 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
867 | #ifdef HAVE_PIPE |
868 | # ifdef EPIPE | |
869 | if (EPIPE == errno) | |
870 | scm_close_port (port); | |
871 | # endif | |
872 | #endif | |
873 | return SCM_UNSPECIFIED; | |
874 | } | |
875 | ||
876 | ||
8b840115 | 877 | /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */ |
1cc91f1b | 878 | |
0f2d19dd | 879 | SCM |
1bbd0b84 | 880 | scm_display (SCM obj, SCM port) |
0f2d19dd JB |
881 | { |
882 | if (SCM_UNBNDP (port)) | |
883 | port = scm_cur_outp; | |
3eb7e6ee JB |
884 | |
885 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display); | |
bb35f315 | 886 | |
a51ea417 | 887 | scm_prin1 (obj, port, 0); |
0f2d19dd JB |
888 | #ifdef HAVE_PIPE |
889 | # ifdef EPIPE | |
890 | if (EPIPE == errno) | |
891 | scm_close_port (port); | |
892 | # endif | |
893 | #endif | |
894 | return SCM_UNSPECIFIED; | |
895 | } | |
896 | ||
70d63753 GB |
897 | |
898 | SCM_DEFINE (scm_simple_format, "simple-format", 2, 0, 1, | |
899 | (SCM destination, SCM message, SCM args), | |
eca65e90 MG |
900 | "Write @var{message} to @var{destination}, defaulting to\n" |
901 | "the current output port.\n" | |
902 | "@var{message} can contain @code{~A} (was @code{%s}) and\n" | |
903 | "@code{~S} (was @code{%S}) escapes. When printed,\n" | |
904 | "the escapes are replaced with corresponding members of\n" | |
905 | "@var{ARGS}:\n" | |
906 | "@code{~A} formats using @code{display} and @code{~S} formats\n" | |
907 | "using @code{write}.\n" | |
908 | "If @var{destination} is @code{#t}, then use the current output\n" | |
909 | "port, if @var{destination} is @code{#f}, then return a string\n" | |
910 | "containing the formatted text. Does not add a trailing newline.") | |
70d63753 GB |
911 | #define FUNC_NAME s_scm_simple_format |
912 | { | |
913 | SCM answer = SCM_UNSPECIFIED; | |
914 | int fReturnString = 0; | |
915 | int writingp; | |
916 | char *start; | |
b24b5e13 | 917 | char *end; |
70d63753 GB |
918 | char *p; |
919 | ||
daba1a71 MD |
920 | if (SCM_EQ_P (destination, SCM_BOOL_T)) |
921 | { | |
922 | destination = scm_cur_outp; | |
923 | } | |
924 | else if (SCM_FALSEP (destination)) | |
925 | { | |
926 | fReturnString = 1; | |
927 | destination = scm_mkstrport (SCM_INUM0, | |
928 | scm_make_string (SCM_INUM0, SCM_UNDEFINED), | |
929 | SCM_OPN | SCM_WRTNG, | |
930 | FUNC_NAME); | |
931 | } | |
932 | else | |
933 | { | |
934 | SCM_VALIDATE_OPORT_VALUE (1, destination); | |
935 | destination = SCM_COERCE_OUTPORT (destination); | |
936 | } | |
937 | SCM_VALIDATE_STRING (2, message); | |
af45e3b0 | 938 | SCM_VALIDATE_REST_ARGUMENT (args); |
70d63753 | 939 | |
34f0f2b8 | 940 | start = SCM_STRING_CHARS (message); |
b24b5e13 DH |
941 | end = start + SCM_STRING_LENGTH (message); |
942 | for (p = start; p != end; ++p) | |
70d63753 GB |
943 | if (*p == '~') |
944 | { | |
b24b5e13 DH |
945 | if (!SCM_CONSP (args)) |
946 | continue; | |
947 | ||
948 | if (++p == end) | |
70d63753 GB |
949 | continue; |
950 | ||
cc6f0237 | 951 | if (*p == 'A' || *p == 'a') |
70d63753 | 952 | writingp = 0; |
cc6f0237 | 953 | else if (*p == 'S' || *p == 's') |
70d63753 GB |
954 | writingp = 1; |
955 | else | |
956 | continue; | |
957 | ||
958 | scm_lfwrite (start, p - start - 1, destination); | |
959 | scm_prin1 (SCM_CAR (args), destination, writingp); | |
960 | args = SCM_CDR (args); | |
961 | start = p + 1; | |
962 | } | |
963 | scm_lfwrite (start, p - start, destination); | |
964 | ||
965 | if (fReturnString) | |
966 | answer = scm_strport_to_string (destination); | |
967 | ||
daba1a71 | 968 | return scm_return_first (answer, message); |
70d63753 GB |
969 | } |
970 | #undef FUNC_NAME | |
971 | ||
972 | ||
3b3b36dd | 973 | SCM_DEFINE (scm_newline, "newline", 0, 1, 0, |
b450f070 | 974 | (SCM port), |
eca65e90 | 975 | "Send a newline to @var{port}.") |
1bbd0b84 | 976 | #define FUNC_NAME s_scm_newline |
0f2d19dd JB |
977 | { |
978 | if (SCM_UNBNDP (port)) | |
bb35f315 | 979 | port = scm_cur_outp; |
3eb7e6ee | 980 | |
3b3b36dd | 981 | SCM_VALIDATE_OPORT_VALUE (1,port); |
bb35f315 | 982 | |
0ef4ae82 | 983 | scm_putc ('\n', SCM_COERCE_OUTPORT (port)); |
0f2d19dd JB |
984 | return SCM_UNSPECIFIED; |
985 | } | |
1bbd0b84 | 986 | #undef FUNC_NAME |
0f2d19dd | 987 | |
3b3b36dd | 988 | SCM_DEFINE (scm_write_char, "write-char", 1, 1, 0, |
b450f070 | 989 | (SCM chr, SCM port), |
eca65e90 | 990 | "Send character @var{chr} to @var{port}.") |
1bbd0b84 | 991 | #define FUNC_NAME s_scm_write_char |
0f2d19dd JB |
992 | { |
993 | if (SCM_UNBNDP (port)) | |
bb35f315 | 994 | port = scm_cur_outp; |
3eb7e6ee | 995 | |
7866a09b | 996 | SCM_VALIDATE_CHAR (1,chr); |
3b3b36dd | 997 | SCM_VALIDATE_OPORT_VALUE (2,port); |
bb35f315 | 998 | |
7866a09b | 999 | scm_putc ((int) SCM_CHAR (chr), SCM_COERCE_OUTPORT (port)); |
0f2d19dd JB |
1000 | #ifdef HAVE_PIPE |
1001 | # ifdef EPIPE | |
1002 | if (EPIPE == errno) | |
1003 | scm_close_port (port); | |
1004 | # endif | |
1005 | #endif | |
1006 | return SCM_UNSPECIFIED; | |
1007 | } | |
1bbd0b84 | 1008 | #undef FUNC_NAME |
0f2d19dd | 1009 | |
0f2d19dd JB |
1010 | \f |
1011 | ||
bb35f315 | 1012 | /* Call back to Scheme code to do the printing of special objects |
c19bc088 MD |
1013 | * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob |
1014 | * containing PORT and PSTATE. This object can be used as the port for | |
1015 | * display/write etc to continue the current print chain. The REVEALED | |
1016 | * field of PSTATE is set to true to indicate that the print state has | |
1017 | * escaped to Scheme and thus has to be freed by the GC. | |
1018 | */ | |
1019 | ||
e841c3e0 | 1020 | scm_bits_t scm_tc16_port_with_ps; |
c19bc088 MD |
1021 | |
1022 | /* Print exactly as the port itself would */ | |
1023 | ||
1024 | static int | |
e841c3e0 | 1025 | port_with_ps_print (SCM obj, SCM port, scm_print_state *pstate) |
c19bc088 MD |
1026 | { |
1027 | obj = SCM_PORT_WITH_PS_PORT (obj); | |
1028 | return scm_ptobs[SCM_PTOBNUM (obj)].print (obj, port, pstate); | |
1029 | } | |
c4f37e80 MV |
1030 | |
1031 | SCM | |
1bbd0b84 | 1032 | scm_printer_apply (SCM proc, SCM exp, SCM port, scm_print_state *pstate) |
c4f37e80 | 1033 | { |
c19bc088 | 1034 | SCM pwps; |
bb35f315 | 1035 | SCM pair = scm_cons (port, pstate->handle); |
54778cd3 | 1036 | SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, SCM_UNPACK (pair)); |
bb35f315 | 1037 | pstate->revealed = 1; |
c19bc088 MD |
1038 | return scm_apply (proc, exp, scm_cons (pwps, scm_listofnull)); |
1039 | } | |
1040 | ||
a1ec6916 | 1041 | SCM_DEFINE (scm_port_with_print_state, "port-with-print-state", 2, 0, 0, |
1bbd0b84 | 1042 | (SCM port, SCM pstate), |
71331188 MG |
1043 | "Create a new port which behaves like @var{port}, but with an\n" |
1044 | "included print state @var{pstate}.") | |
1bbd0b84 | 1045 | #define FUNC_NAME s_scm_port_with_print_state |
c19bc088 MD |
1046 | { |
1047 | SCM pwps; | |
3b3b36dd GB |
1048 | SCM_VALIDATE_OPORT_VALUE (1,port); |
1049 | SCM_VALIDATE_PRINTSTATE (2,pstate); | |
c19bc088 | 1050 | port = SCM_COERCE_OUTPORT (port); |
54778cd3 | 1051 | SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, SCM_UNPACK (scm_cons (port, pstate))); |
c19bc088 MD |
1052 | return pwps; |
1053 | } | |
1bbd0b84 | 1054 | #undef FUNC_NAME |
c19bc088 | 1055 | |
a1ec6916 | 1056 | SCM_DEFINE (scm_get_print_state, "get-print-state", 1, 0, 0, |
1bbd0b84 | 1057 | (SCM port), |
71331188 MG |
1058 | "Return the print state of the port @var{port}. If @var{port}\n" |
1059 | "has no associated print state, @code{#f} is returned.") | |
1bbd0b84 | 1060 | #define FUNC_NAME s_scm_get_print_state |
c19bc088 | 1061 | { |
368cf54d GB |
1062 | if (SCM_PORT_WITH_PS_P (port)) |
1063 | return SCM_PORT_WITH_PS_PS (port); | |
f5f2dcff | 1064 | if (SCM_OUTPUT_PORT_P (port)) |
368cf54d | 1065 | return SCM_BOOL_F; |
276dd677 | 1066 | SCM_WRONG_TYPE_ARG (1, port); |
c4f37e80 | 1067 | } |
1bbd0b84 | 1068 | #undef FUNC_NAME |
bb35f315 | 1069 | |
c4f37e80 | 1070 | \f |
1cc91f1b | 1071 | |
0f2d19dd JB |
1072 | void |
1073 | scm_init_print () | |
0f2d19dd | 1074 | { |
c19bc088 | 1075 | SCM vtable, layout, type; |
4bfdf158 | 1076 | |
b7ff98dd | 1077 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
3ce4544c | 1078 | vtable = scm_make_vtable_vtable (scm_nullstr, SCM_INUM0, SCM_EOL); |
4bfdf158 | 1079 | layout = scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)); |
c19bc088 | 1080 | type = scm_make_struct (vtable, SCM_INUM0, SCM_LIST1 (layout)); |
38ae064c | 1081 | scm_set_struct_vtable_name_x (type, scm_str2symbol ("print-state")); |
c62fbfe1 | 1082 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); |
c4f37e80 | 1083 | |
bb35f315 | 1084 | scm_print_state_vtable = type; |
c4f37e80 | 1085 | |
c19bc088 MD |
1086 | /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */ |
1087 | scm_tc16_port_with_ps = scm_make_smob_type (0, 0); | |
1088 | scm_set_smob_mark (scm_tc16_port_with_ps, scm_markcdr); | |
e841c3e0 | 1089 | scm_set_smob_print (scm_tc16_port_with_ps, port_with_ps_print); |
c19bc088 | 1090 | |
8dc9439f | 1091 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 1092 | #include "libguile/print.x" |
8dc9439f | 1093 | #endif |
0f2d19dd | 1094 | } |
89e00824 ML |
1095 | |
1096 | /* | |
1097 | Local Variables: | |
1098 | c-file-style: "gnu" | |
1099 | End: | |
1100 | */ |