Commit | Line | Data |
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ca2ec018 | 1 | /* Copyright (C) 1995,1996,1998,1999,2000,2001,2002, 2003, 2005, 2006, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd JB |
20 | \f |
21 | ||
dbb605f5 | 22 | #ifdef HAVE_CONFIG_H |
c986274f RB |
23 | # include <config.h> |
24 | #endif | |
25 | ||
a0599745 | 26 | #include "libguile/_scm.h" |
681b9005 MD |
27 | |
28 | #include <stdio.h> | |
29 | #ifdef HAVE_UNISTD_H | |
30 | #include <unistd.h> | |
31 | #endif | |
32 | ||
691fcf66 | 33 | #include "libguile/bytevectors.h" |
a0599745 MD |
34 | #include "libguile/eval.h" |
35 | #include "libguile/ports.h" | |
36 | #include "libguile/read.h" | |
37 | #include "libguile/root.h" | |
38 | #include "libguile/strings.h" | |
07bcf91d | 39 | #include "libguile/modules.h" |
fe78b6c0 | 40 | #include "libguile/validate.h" |
ca13a04a | 41 | #include "libguile/deprecation.h" |
889975e5 | 42 | #include "libguile/srfi-4.h" |
20e6290e | 43 | |
a0599745 | 44 | #include "libguile/strports.h" |
0f2d19dd | 45 | |
95b88819 GH |
46 | #ifdef HAVE_STRING_H |
47 | #include <string.h> | |
48 | #endif | |
49 | ||
0f2d19dd JB |
50 | \f |
51 | ||
52 | /* {Ports - string ports} | |
53 | * | |
54 | */ | |
55 | ||
3fe6190f | 56 | /* NOTES: |
cc95e00a | 57 | |
691fcf66 | 58 | write_buf/write_end point to the ends of the allocated bytevector. |
ca2ec018 AW |
59 | read_buf/read_end point to the part of the bytevector which has been |
60 | written to. read_pos and write_pos are always equal. | |
bf5ad0da KR |
61 | |
62 | ENHANCE-ME - output blocks: | |
63 | ||
64 | The current code keeps an output string as a single block. That means | |
65 | when the size is increased the entire old contents must be copied. It'd | |
66 | be more efficient to begin a new block when the old one is full, so | |
67 | there's no re-copying of previous data. | |
68 | ||
69 | To make seeking efficient, keeping the pieces in a vector might be best, | |
70 | though appending is probably the most common operation. The size of each | |
71 | block could be progressively increased, so the bigger the string the | |
72 | bigger the blocks. | |
73 | ||
74 | When `get-output-string' is called the blocks have to be coalesced into a | |
75 | string, the result could be kept as a single big block. If blocks were | |
76 | strings then `get-output-string' could notice when there's just one and | |
77 | return that with a copy-on-write (though repeated calls to | |
78 | `get-output-string' are probably unlikely). | |
79 | ||
80 | Another possibility would be to extend the port mechanism to let SCM | |
81 | strings come through directly from `display' and friends. That way if a | |
82 | big string is written it can be kept as a copy-on-write, saving time | |
83 | copying and maybe saving some space. */ | |
84 | ||
1cc91f1b | 85 | |
92c2555f | 86 | scm_t_bits scm_tc16_strport; |
a98bddfd DH |
87 | |
88 | ||
ee149d03 | 89 | static int |
ca2ec018 | 90 | st_fill_input (SCM port) |
0f2d19dd | 91 | { |
92c2555f | 92 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 93 | |
ee149d03 JB |
94 | if (pt->read_pos >= pt->read_end) |
95 | return EOF; | |
96 | else | |
ca2ec018 | 97 | return *pt->read_pos; |
0f2d19dd JB |
98 | } |
99 | ||
691fcf66 LC |
100 | /* Change the size of a port's bytevector to NEW_SIZE. This doesn't |
101 | change `read_buf_size'. */ | |
102 | static void | |
f1ce9199 | 103 | st_resize_port (scm_t_port *pt, scm_t_off new_size) |
754c9491 | 104 | { |
94115ae3 | 105 | SCM old_stream = SCM_PACK (pt->stream); |
691fcf66 LC |
106 | const signed char *src = SCM_BYTEVECTOR_CONTENTS (old_stream); |
107 | SCM new_stream = scm_c_make_bytevector (new_size); | |
108 | signed char *dst = SCM_BYTEVECTOR_CONTENTS (new_stream); | |
109 | unsigned long int old_size = SCM_BYTEVECTOR_LENGTH (old_stream); | |
c014a02e | 110 | unsigned long int min_size = min (old_size, new_size); |
74a16888 | 111 | |
ca2ec018 | 112 | scm_t_off offset = pt->write_pos - pt->write_buf; |
3fe6190f GH |
113 | |
114 | pt->write_buf_size = new_size; | |
115 | ||
691fcf66 | 116 | memcpy (dst, src, min_size); |
8824ac88 MV |
117 | |
118 | scm_remember_upto_here_1 (old_stream); | |
754c9491 | 119 | |
94115ae3 | 120 | /* reset buffer. */ |
754c9491 | 121 | { |
729dbac3 | 122 | pt->stream = SCM_UNPACK (new_stream); |
5a6d139b | 123 | pt->read_buf = pt->write_buf = (unsigned char *)dst; |
ca2ec018 | 124 | pt->read_pos = pt->write_pos = pt->write_buf + offset; |
3fe6190f GH |
125 | pt->write_end = pt->write_buf + pt->write_buf_size; |
126 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
754c9491 JB |
127 | } |
128 | } | |
129 | ||
ee149d03 | 130 | static void |
ca2ec018 | 131 | st_write (SCM port, const void *data, size_t size) |
0f2d19dd | 132 | { |
92c2555f | 133 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 134 | |
ca2ec018 AW |
135 | if (size > pt->write_end - pt->write_pos) |
136 | st_resize_port (pt, max (pt->write_buf_size * 2, | |
137 | pt->write_end - pt->write_pos + size)); | |
138 | ||
139 | memcpy ((char *) pt->write_pos, data, size); | |
140 | pt->read_pos = (pt->write_pos += size); | |
d8f1c216 | 141 | |
3fe6190f GH |
142 | if (pt->read_pos > pt->read_end) |
143 | { | |
144 | pt->read_end = (unsigned char *) pt->read_pos; | |
145 | pt->read_buf_size = pt->read_end - pt->read_buf; | |
146 | } | |
31703ab8 GH |
147 | } |
148 | ||
754c9491 | 149 | static void |
affc96b5 | 150 | st_end_input (SCM port, int offset) |
754c9491 | 151 | { |
92c2555f | 152 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
7dcb364d | 153 | |
cd19d608 GH |
154 | if (pt->read_pos - pt->read_buf < offset) |
155 | scm_misc_error ("st_end_input", "negative position", SCM_EOL); | |
156 | ||
a3c8b9fc | 157 | pt->write_pos = (unsigned char *) (pt->read_pos = pt->read_pos - offset); |
61e452ba | 158 | pt->rw_active = SCM_PORT_NEITHER; |
754c9491 JB |
159 | } |
160 | ||
f1ce9199 LC |
161 | static scm_t_off |
162 | st_seek (SCM port, scm_t_off offset, int whence) | |
754c9491 | 163 | { |
92c2555f | 164 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
f1ce9199 | 165 | scm_t_off target; |
754c9491 | 166 | |
7dcb364d GH |
167 | if (pt->rw_active == SCM_PORT_READ && offset == 0 && whence == SEEK_CUR) |
168 | /* special case to avoid disturbing the unread-char buffer. */ | |
754c9491 | 169 | { |
7dcb364d GH |
170 | if (pt->read_buf == pt->putback_buf) |
171 | { | |
172 | target = pt->saved_read_pos - pt->saved_read_buf | |
173 | - (pt->read_end - pt->read_pos); | |
174 | } | |
175 | else | |
176 | { | |
177 | target = pt->read_pos - pt->read_buf; | |
178 | } | |
754c9491 | 179 | } |
7dcb364d GH |
180 | else |
181 | /* all other cases. */ | |
754c9491 | 182 | { |
7dcb364d | 183 | if (pt->rw_active == SCM_PORT_READ) |
4251ae2e | 184 | scm_end_input_unlocked (port); |
7dcb364d | 185 | |
ca2ec018 AW |
186 | pt->rw_active = SCM_PORT_NEITHER; |
187 | ||
7dcb364d GH |
188 | switch (whence) |
189 | { | |
190 | case SEEK_CUR: | |
191 | target = pt->read_pos - pt->read_buf + offset; | |
192 | break; | |
193 | case SEEK_END: | |
194 | target = pt->read_end - pt->read_buf + offset; | |
195 | break; | |
196 | default: /* SEEK_SET */ | |
197 | target = offset; | |
198 | break; | |
199 | } | |
200 | ||
201 | if (target < 0) | |
202 | scm_misc_error ("st_seek", "negative offset", SCM_EOL); | |
203 | ||
204 | if (target >= pt->write_buf_size) | |
3fe6190f | 205 | { |
206d3de3 | 206 | if (!(SCM_CELL_WORD_0 (port) & SCM_WRTNG)) |
3fe6190f | 207 | { |
7dcb364d GH |
208 | if (target > pt->write_buf_size) |
209 | { | |
210 | scm_misc_error ("st_seek", | |
211 | "seek past end of read-only strport", | |
212 | SCM_EOL); | |
213 | } | |
214 | } | |
d8f1c216 LC |
215 | else if (target == pt->write_buf_size) |
216 | st_resize_port (pt, target * 2); | |
3fe6190f | 217 | } |
7dcb364d GH |
218 | pt->read_pos = pt->write_pos = pt->read_buf + target; |
219 | if (pt->read_pos > pt->read_end) | |
3fe6190f | 220 | { |
7dcb364d GH |
221 | pt->read_end = (unsigned char *) pt->read_pos; |
222 | pt->read_buf_size = pt->read_end - pt->read_buf; | |
3fe6190f | 223 | } |
ee149d03 | 224 | } |
754c9491 JB |
225 | return target; |
226 | } | |
227 | ||
228 | static void | |
f1ce9199 | 229 | st_truncate (SCM port, scm_t_off length) |
754c9491 | 230 | { |
92c2555f | 231 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
3fe6190f GH |
232 | |
233 | if (length > pt->write_buf_size) | |
234 | st_resize_port (pt, length); | |
235 | ||
236 | pt->read_buf_size = length; | |
237 | pt->read_end = pt->read_buf + length; | |
238 | if (pt->read_pos > pt->read_end) | |
ca2ec018 | 239 | pt->read_pos = pt->write_pos = pt->read_end; |
0f2d19dd JB |
240 | } |
241 | ||
0b2c2ba3 LC |
242 | /* The initial size in bytes of a string port's buffer. */ |
243 | #define INITIAL_BUFFER_SIZE 128 | |
244 | ||
245 | /* Return a new string port with MODES. If STR is #f, a new backing | |
246 | buffer is allocated; otherwise STR must be a string and a copy of it | |
247 | serves as the buffer for the new port. */ | |
7b041912 LC |
248 | SCM |
249 | scm_mkstrport (SCM pos, SCM str, long modes, const char *caller) | |
0f2d19dd | 250 | { |
691fcf66 | 251 | SCM z, buf; |
92c2555f | 252 | scm_t_port *pt; |
2721f918 AW |
253 | const char *encoding; |
254 | size_t read_buf_size, str_len, c_pos; | |
691fcf66 | 255 | char *c_buf; |
e11e83f3 | 256 | |
754c9491 JB |
257 | if (!((modes & SCM_WRTNG) || (modes & SCM_RDNG))) |
258 | scm_misc_error ("scm_mkstrport", "port must read or write", SCM_EOL); | |
5f16b897 | 259 | |
2721f918 | 260 | encoding = scm_i_default_port_encoding (); |
7b041912 | 261 | |
0b2c2ba3 LC |
262 | if (scm_is_false (str)) |
263 | { | |
264 | /* Allocate a new buffer to write to. */ | |
265 | str_len = INITIAL_BUFFER_SIZE; | |
266 | buf = scm_c_make_bytevector (str_len); | |
267 | c_buf = (char *) SCM_BYTEVECTOR_CONTENTS (buf); | |
268 | ||
269 | /* Reset `read_buf_size'. It will contain the actual number of | |
2721f918 AW |
270 | bytes written to the port. */ |
271 | read_buf_size = 0; | |
0b2c2ba3 LC |
272 | c_pos = 0; |
273 | } | |
274 | else | |
275 | { | |
276 | /* STR is a string. */ | |
277 | char *copy; | |
691fcf66 | 278 | |
0b2c2ba3 | 279 | SCM_ASSERT (scm_is_string (str), str, SCM_ARG1, caller); |
691fcf66 | 280 | |
2721f918 AW |
281 | /* Create a copy of STR in ENCODING. */ |
282 | copy = scm_to_stringn (str, &str_len, encoding, | |
0b2c2ba3 LC |
283 | SCM_FAILED_CONVERSION_ERROR); |
284 | buf = scm_c_make_bytevector (str_len); | |
285 | c_buf = (char *) SCM_BYTEVECTOR_CONTENTS (buf); | |
286 | memcpy (c_buf, copy, str_len); | |
287 | free (copy); | |
691fcf66 | 288 | |
0b2c2ba3 | 289 | c_pos = scm_to_unsigned_integer (pos, 0, str_len); |
2721f918 | 290 | read_buf_size = str_len; |
0b2c2ba3 | 291 | } |
691fcf66 | 292 | |
2721f918 AW |
293 | z = scm_c_make_port_with_encoding (scm_tc16_strport, modes, |
294 | encoding, | |
295 | SCM_FAILED_CONVERSION_ERROR, | |
296 | (scm_t_bits)buf); | |
7b041912 | 297 | |
2721f918 | 298 | pt = SCM_PTAB_ENTRY (z); |
691fcf66 | 299 | pt->write_buf = pt->read_buf = (unsigned char *) c_buf; |
e11e83f3 | 300 | pt->read_pos = pt->write_pos = pt->read_buf + c_pos; |
2721f918 | 301 | pt->read_buf_size = read_buf_size; |
691fcf66 | 302 | pt->write_buf_size = str_len; |
754c9491 | 303 | pt->write_end = pt->read_end = pt->read_buf + pt->read_buf_size; |
0de97b83 | 304 | pt->rw_random = 1; |
3fe6190f | 305 | |
0f2d19dd JB |
306 | return z; |
307 | } | |
308 | ||
7b041912 LC |
309 | /* Create a new string from the buffer of PORT, a string port, converting from |
310 | PORT's encoding to the standard string representation. */ | |
311 | SCM | |
312 | scm_strport_to_string (SCM port) | |
3fe6190f | 313 | { |
7b041912 LC |
314 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
315 | ||
fac32b51 MG |
316 | if (pt->read_buf_size == 0) |
317 | return scm_nullstr; | |
318 | ||
ca2ec018 AW |
319 | return scm_from_stringn ((char *)pt->read_buf, pt->read_buf_size, |
320 | pt->encoding, pt->ilseq_handler); | |
3fe6190f GH |
321 | } |
322 | ||
fe78b6c0 KN |
323 | SCM_DEFINE (scm_object_to_string, "object->string", 1, 1, 0, |
324 | (SCM obj, SCM printer), | |
325 | "Return a Scheme string obtained by printing @var{obj}.\n" | |
326 | "Printing function can be specified by the optional second\n" | |
327 | "argument @var{printer} (default: @code{write}).") | |
1f3908c4 KN |
328 | #define FUNC_NAME s_scm_object_to_string |
329 | { | |
8b263377 | 330 | SCM port, result; |
fe78b6c0 KN |
331 | |
332 | if (!SCM_UNBNDP (printer)) | |
333 | SCM_VALIDATE_PROC (2, printer); | |
1f3908c4 | 334 | |
0b2c2ba3 LC |
335 | port = scm_mkstrport (SCM_INUM0, SCM_BOOL_F, |
336 | SCM_OPN | SCM_WRTNG, FUNC_NAME); | |
fe78b6c0 KN |
337 | |
338 | if (SCM_UNBNDP (printer)) | |
339 | scm_write (obj, port); | |
340 | else | |
fdc28395 | 341 | scm_call_2 (printer, obj, port); |
fe78b6c0 | 342 | |
8b263377 LC |
343 | result = scm_strport_to_string (port); |
344 | ||
345 | /* Explicitly close PORT so that the iconv CDs associated with it are | |
346 | deallocated right away. This is important because CDs use a lot of | |
347 | memory that's not visible to the GC, so not freeing them can lead | |
348 | to almost large heap usage. See | |
349 | <http://wingolog.org/archives/2011/02/25/ports-weaks-gc-and-dark-matter> | |
350 | for details. */ | |
351 | scm_close_port (port); | |
352 | ||
353 | return result; | |
1f3908c4 KN |
354 | } |
355 | #undef FUNC_NAME | |
356 | ||
3b3b36dd | 357 | SCM_DEFINE (scm_call_with_output_string, "call-with-output-string", 1, 0, 0, |
1bbd0b84 | 358 | (SCM proc), |
b380b885 MD |
359 | "Calls the one-argument procedure @var{proc} with a newly created output\n" |
360 | "port. When the function returns, the string composed of the characters\n" | |
361 | "written into the port is returned.") | |
1bbd0b84 | 362 | #define FUNC_NAME s_scm_call_with_output_string |
0f2d19dd JB |
363 | { |
364 | SCM p; | |
754c9491 | 365 | |
0b2c2ba3 | 366 | p = scm_mkstrport (SCM_INUM0, SCM_BOOL_F, |
754c9491 | 367 | SCM_OPN | SCM_WRTNG, |
1bbd0b84 | 368 | FUNC_NAME); |
fdc28395 | 369 | scm_call_1 (proc, p); |
3fe6190f | 370 | |
184b85a3 | 371 | return scm_get_output_string (p); |
0f2d19dd | 372 | } |
1bbd0b84 | 373 | #undef FUNC_NAME |
0f2d19dd | 374 | |
3b3b36dd | 375 | SCM_DEFINE (scm_call_with_input_string, "call-with-input-string", 2, 0, 0, |
1e6808ea MG |
376 | (SCM string, SCM proc), |
377 | "Calls the one-argument procedure @var{proc} with a newly\n" | |
378 | "created input port from which @var{string}'s contents may be\n" | |
379 | "read. The value yielded by the @var{proc} is returned.") | |
1bbd0b84 | 380 | #define FUNC_NAME s_scm_call_with_input_string |
0f2d19dd | 381 | { |
1e6808ea | 382 | SCM p = scm_mkstrport(SCM_INUM0, string, SCM_OPN | SCM_RDNG, FUNC_NAME); |
fdc28395 | 383 | return scm_call_1 (proc, p); |
0f2d19dd | 384 | } |
1bbd0b84 | 385 | #undef FUNC_NAME |
0f2d19dd | 386 | |
e87a03fc MG |
387 | SCM_DEFINE (scm_open_input_string, "open-input-string", 1, 0, 0, |
388 | (SCM str), | |
1e6808ea MG |
389 | "Take a string and return an input port that delivers characters\n" |
390 | "from the string. The port can be closed by\n" | |
e87a03fc MG |
391 | "@code{close-input-port}, though its storage will be reclaimed\n" |
392 | "by the garbage collector if it becomes inaccessible.") | |
393 | #define FUNC_NAME s_scm_open_input_string | |
394 | { | |
395 | SCM p = scm_mkstrport(SCM_INUM0, str, SCM_OPN | SCM_RDNG, FUNC_NAME); | |
396 | return p; | |
397 | } | |
398 | #undef FUNC_NAME | |
399 | ||
400 | SCM_DEFINE (scm_open_output_string, "open-output-string", 0, 0, 0, | |
401 | (void), | |
1e6808ea | 402 | "Return an output port that will accumulate characters for\n" |
e87a03fc MG |
403 | "retrieval by @code{get-output-string}. The port can be closed\n" |
404 | "by the procedure @code{close-output-port}, though its storage\n" | |
405 | "will be reclaimed by the garbage collector if it becomes\n" | |
406 | "inaccessible.") | |
407 | #define FUNC_NAME s_scm_open_output_string | |
408 | { | |
409 | SCM p; | |
410 | ||
0b2c2ba3 | 411 | p = scm_mkstrport (SCM_INUM0, SCM_BOOL_F, |
e87a03fc MG |
412 | SCM_OPN | SCM_WRTNG, |
413 | FUNC_NAME); | |
414 | return p; | |
415 | } | |
416 | #undef FUNC_NAME | |
417 | ||
418 | SCM_DEFINE (scm_get_output_string, "get-output-string", 1, 0, 0, | |
419 | (SCM port), | |
420 | "Given an output port created by @code{open-output-string},\n" | |
1e6808ea | 421 | "return a string consisting of the characters that have been\n" |
e87a03fc MG |
422 | "output to the port so far.") |
423 | #define FUNC_NAME s_scm_get_output_string | |
424 | { | |
425 | SCM_VALIDATE_OPOUTSTRPORT (1, port); | |
426 | return scm_strport_to_string (port); | |
427 | } | |
428 | #undef FUNC_NAME | |
1cc91f1b | 429 | |
cd07a097 | 430 | |
a8aa30d8 MD |
431 | /* Given a null-terminated string EXPR containing a Scheme expression |
432 | read it, and return it as an SCM value. */ | |
433 | SCM | |
ca13a04a | 434 | scm_c_read_string (const char *expr) |
a8aa30d8 | 435 | { |
3fe6190f | 436 | SCM port = scm_mkstrport (SCM_INUM0, |
cc95e00a | 437 | scm_from_locale_string (expr), |
a8aa30d8 | 438 | SCM_OPN | SCM_RDNG, |
ca13a04a | 439 | "scm_c_read_string"); |
a8aa30d8 MD |
440 | SCM form; |
441 | ||
deca31e1 | 442 | form = scm_read (port); |
a8aa30d8 MD |
443 | |
444 | scm_close_port (port); | |
445 | return form; | |
446 | } | |
447 | ||
cd07a097 | 448 | /* Given a null-terminated string EXPR containing Scheme program text, |
a8aa30d8 MD |
449 | evaluate it, and return the result of the last expression evaluated. */ |
450 | SCM | |
ca13a04a | 451 | scm_c_eval_string (const char *expr) |
cd07a097 | 452 | { |
cc95e00a | 453 | return scm_eval_string (scm_from_locale_string (expr)); |
b377f53e JB |
454 | } |
455 | ||
209b52fe MV |
456 | SCM |
457 | scm_c_eval_string_in_module (const char *expr, SCM module) | |
458 | { | |
cc95e00a | 459 | return scm_eval_string_in_module (scm_from_locale_string (expr), module); |
209b52fe MV |
460 | } |
461 | ||
462 | ||
209b52fe MV |
463 | SCM_DEFINE (scm_eval_string_in_module, "eval-string", 1, 1, 0, |
464 | (SCM string, SCM module), | |
96e83482 MV |
465 | "Evaluate @var{string} as the text representation of a Scheme\n" |
466 | "form or forms, and return whatever value they produce.\n" | |
209b52fe MV |
467 | "Evaluation takes place in the given module, or the current\n" |
468 | "module when no module is given.\n" | |
469 | "While the code is evaluated, the given module is made the\n" | |
470 | "current one. The current module is restored when this\n" | |
471 | "procedure returns.") | |
472 | #define FUNC_NAME s_scm_eval_string_in_module | |
96e83482 | 473 | { |
0b0e066a AW |
474 | static SCM eval_string = SCM_BOOL_F, k_module = SCM_BOOL_F; |
475 | ||
476 | if (scm_is_false (eval_string)) | |
477 | { | |
478 | eval_string = scm_c_public_lookup ("ice-9 eval-string", "eval-string"); | |
479 | k_module = scm_from_locale_keyword ("module"); | |
480 | } | |
481 | ||
209b52fe MV |
482 | if (SCM_UNBNDP (module)) |
483 | module = scm_current_module (); | |
aeec5be1 MV |
484 | else |
485 | SCM_VALIDATE_MODULE (2, module); | |
0b0e066a AW |
486 | |
487 | return scm_call_3 (scm_variable_ref (eval_string), string, k_module, module); | |
96e83482 | 488 | } |
1bbd0b84 | 489 | #undef FUNC_NAME |
cd07a097 | 490 | |
209b52fe MV |
491 | SCM |
492 | scm_eval_string (SCM string) | |
493 | { | |
494 | return scm_eval_string_in_module (string, SCM_UNDEFINED); | |
495 | } | |
496 | ||
92c2555f | 497 | static scm_t_bits |
0b6881fa | 498 | scm_make_stptob () |
0f2d19dd | 499 | { |
ca2ec018 | 500 | scm_t_bits tc = scm_make_port_type ("string", st_fill_input, st_write); |
a98bddfd | 501 | |
affc96b5 | 502 | scm_set_port_end_input (tc, st_end_input); |
6c747373 | 503 | scm_set_port_seek (tc, st_seek); |
affc96b5 | 504 | scm_set_port_truncate (tc, st_truncate); |
a98bddfd DH |
505 | |
506 | return tc; | |
0f2d19dd JB |
507 | } |
508 | ||
0f2d19dd JB |
509 | void |
510 | scm_init_strports () | |
0f2d19dd | 511 | { |
a98bddfd DH |
512 | scm_tc16_strport = scm_make_stptob (); |
513 | ||
a0599745 | 514 | #include "libguile/strports.x" |
0f2d19dd JB |
515 | } |
516 | ||
89e00824 ML |
517 | |
518 | /* | |
519 | Local Variables: | |
520 | c-file-style: "gnu" | |
521 | End: | |
522 | */ |