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0f2d19dd JB |
1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
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. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "unif.h" |
46 | #include "eval.h" | |
cd07a097 | 47 | #include "read.h" |
20e6290e JB |
48 | |
49 | #include "strports.h" | |
0f2d19dd | 50 | |
95b88819 GH |
51 | #ifdef HAVE_STRING_H |
52 | #include <string.h> | |
53 | #endif | |
54 | ||
0f2d19dd JB |
55 | \f |
56 | ||
57 | /* {Ports - string ports} | |
58 | * | |
59 | */ | |
60 | ||
1cc91f1b | 61 | |
0f2d19dd | 62 | static int |
0f88a8f3 | 63 | prinstpt (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd JB |
64 | { |
65 | scm_prinport (exp, port, "string"); | |
66 | return !0; | |
67 | } | |
68 | ||
1cc91f1b | 69 | |
0f2d19dd | 70 | static int |
0f88a8f3 | 71 | stputc (int c, SCM port) |
0f2d19dd | 72 | { |
0f88a8f3 | 73 | SCM p = SCM_STREAM (port); |
0f2d19dd JB |
74 | scm_sizet ind = SCM_INUM (SCM_CAR (p)); |
75 | SCM_DEFER_INTS; | |
76 | if (ind >= SCM_LENGTH (SCM_CDR (p))) | |
77 | scm_vector_set_length_x (SCM_CDR (p), SCM_MAKINUM (ind + (ind >> 1))); | |
78 | SCM_ALLOW_INTS; | |
79 | SCM_CHARS (SCM_CDR (p))[ind] = c; | |
a6c64c3c | 80 | SCM_SETCAR (p, SCM_MAKINUM (ind + 1)); |
0f2d19dd JB |
81 | return c; |
82 | } | |
83 | ||
1cc91f1b | 84 | |
0f2d19dd | 85 | static scm_sizet |
0f88a8f3 JB |
86 | stwrite (char *str, |
87 | scm_sizet siz, | |
88 | scm_sizet num, | |
89 | SCM port) | |
0f2d19dd | 90 | { |
0f88a8f3 JB |
91 | SCM p = SCM_STREAM (port); |
92 | ||
0f2d19dd JB |
93 | scm_sizet ind = SCM_INUM (SCM_CAR (p)); |
94 | scm_sizet len = siz * num; | |
95 | char *dst; | |
96 | SCM_DEFER_INTS; | |
97 | if (ind + len >= SCM_LENGTH (SCM_CDR (p))) | |
98 | scm_vector_set_length_x (SCM_CDR (p), SCM_MAKINUM (ind + len + ((ind + len) >> 1))); | |
99 | SCM_ALLOW_INTS; | |
100 | dst = &(SCM_CHARS (SCM_CDR (p))[ind]); | |
101 | while (len--) | |
102 | dst[len] = str[len]; | |
a6c64c3c | 103 | SCM_SETCAR (p, SCM_MAKINUM (ind + siz * num)); |
0f2d19dd JB |
104 | return num; |
105 | } | |
106 | ||
1cc91f1b | 107 | |
0f2d19dd | 108 | static int |
0f88a8f3 | 109 | stputs (char *s, SCM port) |
0f2d19dd | 110 | { |
0f88a8f3 | 111 | stwrite (s, 1, strlen (s), port); |
0f2d19dd JB |
112 | return 0; |
113 | } | |
114 | ||
1cc91f1b | 115 | |
0f2d19dd | 116 | static int |
0f88a8f3 | 117 | stgetc (SCM port) |
0f2d19dd | 118 | { |
0f88a8f3 JB |
119 | SCM p = SCM_STREAM (port); |
120 | ||
0f2d19dd JB |
121 | scm_sizet ind = SCM_INUM (SCM_CAR (p)); |
122 | if (ind >= SCM_ROLENGTH (SCM_CDR (p))) | |
123 | return EOF; | |
a6c64c3c | 124 | SCM_SETCAR (p, SCM_MAKINUM (ind + 1)); |
0f2d19dd JB |
125 | return SCM_ROUCHARS (SCM_CDR (p))[ind]; |
126 | } | |
127 | ||
1cc91f1b | 128 | |
0f2d19dd JB |
129 | SCM |
130 | scm_mkstrport (pos, str, modes, caller) | |
131 | SCM pos; | |
132 | SCM str; | |
133 | long modes; | |
134 | char * caller; | |
0f2d19dd JB |
135 | { |
136 | SCM z; | |
137 | SCM stream; | |
138 | struct scm_port_table * pt; | |
139 | ||
140 | SCM_ASSERT(SCM_INUMP(pos) && SCM_INUM(pos) >= 0, pos, SCM_ARG1, caller); | |
141 | SCM_ASSERT(SCM_NIMP(str) && SCM_ROSTRINGP(str), str, SCM_ARG1, caller); | |
142 | stream = scm_cons(pos, str); | |
143 | SCM_NEWCELL (z); | |
144 | SCM_DEFER_INTS; | |
145 | pt = scm_add_to_port_table (z); | |
a6c64c3c | 146 | SCM_SETCAR (z, scm_tc16_strport | modes); |
0f2d19dd JB |
147 | SCM_SETPTAB_ENTRY (z, pt); |
148 | SCM_SETSTREAM (z, stream); | |
149 | SCM_ALLOW_INTS; | |
150 | return z; | |
151 | } | |
152 | ||
153 | SCM_PROC(s_call_with_output_string, "call-with-output-string", 1, 0, 0, scm_call_with_output_string); | |
1cc91f1b | 154 | |
0f2d19dd JB |
155 | SCM |
156 | scm_call_with_output_string (proc) | |
157 | SCM proc; | |
0f2d19dd JB |
158 | { |
159 | SCM p; | |
160 | p = scm_mkstrport(SCM_INUM0, scm_make_string(SCM_MAKINUM(30), SCM_UNDEFINED), | |
161 | SCM_OPN | SCM_WRTNG, | |
162 | s_call_with_output_string); | |
163 | scm_apply (proc, p, scm_listofnull); | |
164 | { | |
165 | SCM answer; | |
166 | SCM_DEFER_INTS; | |
167 | answer = scm_makfromstr (SCM_CHARS (SCM_CDR (SCM_STREAM (p))), | |
168 | SCM_INUM (SCM_CAR (SCM_STREAM (p))), | |
169 | 0); | |
170 | SCM_ALLOW_INTS; | |
171 | return answer; | |
172 | } | |
173 | } | |
174 | ||
175 | ||
176 | ||
177 | /* Return a Scheme string obtained by printing a given object. | |
178 | */ | |
179 | ||
1cc91f1b | 180 | |
0f2d19dd JB |
181 | SCM |
182 | scm_strprint_obj (obj) | |
183 | SCM obj; | |
0f2d19dd JB |
184 | { |
185 | SCM str; | |
186 | SCM port; | |
187 | ||
188 | str = scm_makstr (64, 0); | |
189 | port = scm_mkstrport (SCM_MAKINUM (0), str, SCM_OPN | SCM_WRTNG, "scm_strprint_obj"); | |
87818069 | 190 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
191 | { |
192 | SCM answer; | |
193 | SCM_DEFER_INTS; | |
194 | answer = scm_makfromstr (SCM_CHARS (SCM_CDR (SCM_STREAM (port))), | |
195 | SCM_INUM (SCM_CAR (SCM_STREAM (port))), | |
196 | 0); | |
197 | SCM_ALLOW_INTS; | |
198 | return answer; | |
199 | } | |
200 | } | |
201 | ||
202 | ||
203 | ||
204 | ||
205 | SCM_PROC(s_call_with_input_string, "call-with-input-string", 2, 0, 0, scm_call_with_input_string); | |
1cc91f1b | 206 | |
0f2d19dd JB |
207 | SCM |
208 | scm_call_with_input_string (str, proc) | |
209 | SCM str; | |
210 | SCM proc; | |
0f2d19dd JB |
211 | { |
212 | SCM p = scm_mkstrport(SCM_INUM0, str, SCM_OPN | SCM_RDNG, s_call_with_input_string); | |
213 | return scm_apply (proc, p, scm_listofnull); | |
214 | } | |
215 | ||
1cc91f1b | 216 | |
cd07a097 | 217 | |
a8aa30d8 MD |
218 | /* Given a null-terminated string EXPR containing a Scheme expression |
219 | read it, and return it as an SCM value. */ | |
220 | SCM | |
221 | scm_read_0str (expr) | |
222 | char *expr; | |
223 | { | |
224 | SCM port = scm_mkstrport (SCM_MAKINUM (0), | |
225 | scm_makfrom0str (expr), | |
226 | SCM_OPN | SCM_RDNG, | |
227 | "scm_eval_0str"); | |
228 | SCM form; | |
229 | ||
230 | /* Read expressions from that port; ignore the values. */ | |
deca31e1 | 231 | form = scm_read (port); |
a8aa30d8 MD |
232 | |
233 | scm_close_port (port); | |
234 | return form; | |
235 | } | |
236 | ||
cd07a097 | 237 | /* Given a null-terminated string EXPR containing Scheme program text, |
a8aa30d8 MD |
238 | evaluate it, and return the result of the last expression evaluated. */ |
239 | SCM | |
cd07a097 JB |
240 | scm_eval_0str (expr) |
241 | char *expr; | |
242 | { | |
b377f53e JB |
243 | return scm_eval_string (scm_makfrom0str (expr)); |
244 | } | |
245 | ||
246 | ||
247 | SCM_PROC (s_eval_string, "eval-string", 1, 0, 0, scm_eval_string); | |
248 | ||
249 | SCM | |
250 | scm_eval_string (string) | |
251 | SCM string; | |
252 | { | |
253 | SCM port = scm_mkstrport (SCM_MAKINUM (0), string, SCM_OPN | SCM_RDNG, | |
cd07a097 JB |
254 | "scm_eval_0str"); |
255 | SCM form; | |
b377f53e | 256 | SCM ans = SCM_UNSPECIFIED; |
cd07a097 JB |
257 | |
258 | /* Read expressions from that port; ignore the values. */ | |
0c32d76c | 259 | while (!SCM_EOF_OBJECT_P (form = scm_read (port))) |
a8aa30d8 | 260 | ans = scm_eval_x (form); |
cd07a097 | 261 | |
0d7368d7 JB |
262 | /* Don't close the port here; if we re-enter this function via a |
263 | continuation, then the next time we enter it, we'll get an error. | |
264 | It's a string port anyway, so there's no advantage to closing it | |
265 | early. */ | |
266 | ||
a8aa30d8 | 267 | return ans; |
cd07a097 JB |
268 | } |
269 | ||
270 | ||
b377f53e | 271 | |
1cc91f1b JB |
272 | static int noop0 SCM_P ((SCM stream)); |
273 | ||
0f2d19dd JB |
274 | static int |
275 | noop0 (stream) | |
1cc91f1b | 276 | SCM stream; |
0f2d19dd JB |
277 | { |
278 | return 0; | |
279 | } | |
280 | ||
281 | ||
282 | scm_ptobfuns scm_stptob = | |
283 | { | |
284 | scm_markstream, | |
285 | noop0, | |
286 | prinstpt, | |
287 | 0, | |
288 | stputc, | |
289 | stputs, | |
290 | stwrite, | |
291 | noop0, | |
292 | stgetc, | |
3cb988bd | 293 | scm_generic_fgets, |
0f2d19dd JB |
294 | 0 |
295 | }; | |
296 | ||
297 | ||
1cc91f1b | 298 | |
0f2d19dd JB |
299 | void |
300 | scm_init_strports () | |
0f2d19dd JB |
301 | { |
302 | #include "strports.x" | |
303 | } | |
304 |