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bd9e24b3 | 1 | /* Copyright (C) 1995,1996,1998,2000 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 | ||
47 | #include <stdio.h> | |
48 | #include "_scm.h" | |
20e6290e | 49 | #include "chars.h" |
0f2d19dd | 50 | |
20e6290e | 51 | #include "strings.h" |
b6791b2e | 52 | #include "validate.h" |
0f2d19dd JB |
53 | \f |
54 | ||
55 | /* {Strings} | |
56 | */ | |
57 | ||
3b3b36dd | 58 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, |
6fa73e72 GB |
59 | (SCM obj), |
60 | "Returns #t iff OBJ is a string, else returns #f.") | |
1bbd0b84 | 61 | #define FUNC_NAME s_scm_string_p |
0f2d19dd | 62 | { |
6fa73e72 | 63 | return SCM_BOOL(SCM_STRINGP (obj)); |
0f2d19dd | 64 | } |
1bbd0b84 | 65 | #undef FUNC_NAME |
0f2d19dd | 66 | |
3b3b36dd | 67 | SCM_DEFINE (scm_read_only_string_p, "read-only-string?", 1, 0, 0, |
1bbd0b84 | 68 | (SCM x), |
7866a09b | 69 | "Return true if OBJ can be read as a string,\n\n" |
b380b885 MD |
70 | "This illustrates the difference between @code{string?} and\n" |
71 | "@code{read-only-string?}:\n\n" | |
72 | "@example\n" | |
73 | "(string? \"a string\") @result{} #t\n" | |
74 | "(string? 'a-symbol) @result{} #f\n\n" | |
75 | "(read-only-string? \"a string\") @result{} #t\n" | |
76 | "(read-only-string? 'a-symbol) @result{} #t\n" | |
77 | "@end example") | |
1bbd0b84 | 78 | #define FUNC_NAME s_scm_read_only_string_p |
0f2d19dd | 79 | { |
1bbd0b84 | 80 | return SCM_BOOL(SCM_ROSTRINGP (x)); |
0f2d19dd | 81 | } |
1bbd0b84 | 82 | #undef FUNC_NAME |
0f2d19dd | 83 | |
bd9e24b3 | 84 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); |
1bbd0b84 | 85 | |
3b3b36dd | 86 | SCM_DEFINE (scm_string, "string", 0, 0, 1, |
6fa73e72 GB |
87 | (SCM chrs), |
88 | "Returns a newly allocated string composed of the arguments, CHRS.") | |
1bbd0b84 | 89 | #define FUNC_NAME s_scm_string |
0f2d19dd | 90 | { |
bd9e24b3 GH |
91 | SCM result; |
92 | ||
0f2d19dd | 93 | { |
bd9e24b3 GH |
94 | long i = scm_ilength (chrs); |
95 | ||
96 | SCM_ASSERT (i >= 0, chrs, SCM_ARGn, FUNC_NAME); | |
97 | result = scm_makstr (i, 0); | |
0f2d19dd | 98 | } |
bd9e24b3 GH |
99 | |
100 | { | |
101 | unsigned char *data = SCM_UCHARS (result); | |
102 | ||
103 | while (SCM_NNULLP (chrs)) | |
104 | { | |
105 | SCM elt = SCM_CAR (chrs); | |
106 | ||
7866a09b GB |
107 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
108 | *data++ = SCM_CHAR (elt); | |
bd9e24b3 GH |
109 | chrs = SCM_CDR (chrs); |
110 | } | |
111 | } | |
112 | return result; | |
0f2d19dd | 113 | } |
1bbd0b84 | 114 | #undef FUNC_NAME |
0f2d19dd | 115 | |
0f2d19dd | 116 | SCM |
1bbd0b84 | 117 | scm_makstr (long len, int slots) |
0f2d19dd JB |
118 | { |
119 | SCM s; | |
120 | SCM * mem; | |
121 | SCM_NEWCELL (s); | |
122 | --slots; | |
123 | SCM_REDEFER_INTS; | |
124 | mem = (SCM *)scm_must_malloc (sizeof (SCM) * (slots + 1) + len + 1, | |
1bbd0b84 | 125 | "scm_makstr"); |
0f2d19dd JB |
126 | if (slots >= 0) |
127 | { | |
128 | int x; | |
129 | mem[slots] = (SCM)mem; | |
130 | for (x = 0; x < slots; ++x) | |
131 | mem[x] = SCM_BOOL_F; | |
132 | } | |
133 | SCM_SETCHARS (s, (char *) (mem + slots + 1)); | |
134 | SCM_SETLENGTH (s, len, scm_tc7_string); | |
135 | SCM_REALLOW_INTS; | |
136 | SCM_CHARS (s)[len] = 0; | |
137 | return s; | |
138 | } | |
139 | ||
140 | /* converts C scm_array of strings to SCM scm_list of strings. */ | |
141 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
1cc91f1b | 142 | |
0f2d19dd | 143 | SCM |
1bbd0b84 | 144 | scm_makfromstrs (int argc, char **argv) |
0f2d19dd JB |
145 | { |
146 | int i = argc; | |
147 | SCM lst = SCM_EOL; | |
148 | if (0 > i) | |
149 | for (i = 0; argv[i]; i++); | |
150 | while (i--) | |
151 | lst = scm_cons (scm_makfromstr (argv[i], (scm_sizet) strlen (argv[i]), 0), lst); | |
152 | return lst; | |
153 | } | |
154 | ||
155 | ||
ee149d03 JB |
156 | /* This function must only be applied to memory obtained via malloc, |
157 | since the GC is going to apply `free' to it when the string is | |
158 | dropped. | |
159 | ||
160 | Also, s[len] must be `\0', since we promise that strings are | |
161 | null-terminated. Perhaps we could handle non-null-terminated | |
162 | strings by claiming they're shared substrings of a string we just | |
163 | made up. */ | |
0f2d19dd | 164 | SCM |
ee149d03 | 165 | scm_take_str (char *s, int len) |
0f2d19dd JB |
166 | { |
167 | SCM answer; | |
168 | SCM_NEWCELL (answer); | |
169 | SCM_DEFER_INTS; | |
ee149d03 JB |
170 | SCM_SETLENGTH (answer, len, scm_tc7_string); |
171 | scm_done_malloc (len + 1); | |
172 | SCM_SETCHARS (answer, s); | |
0f2d19dd JB |
173 | SCM_ALLOW_INTS; |
174 | return answer; | |
175 | } | |
176 | ||
ee149d03 JB |
177 | /* `s' must be a malloc'd string. See scm_take_str. */ |
178 | SCM | |
179 | scm_take0str (char *s) | |
180 | { | |
181 | return scm_take_str (s, strlen (s)); | |
182 | } | |
183 | ||
0f2d19dd | 184 | SCM |
1bbd0b84 | 185 | scm_makfromstr (const char *src, scm_sizet len, int slots) |
0f2d19dd | 186 | { |
bd9e24b3 GH |
187 | SCM s = scm_makstr (len, slots); |
188 | char *dst = SCM_CHARS (s); | |
189 | ||
0f2d19dd JB |
190 | while (len--) |
191 | *dst++ = *src++; | |
192 | return s; | |
193 | } | |
194 | ||
0f2d19dd | 195 | SCM |
1bbd0b84 | 196 | scm_makfrom0str (const char *src) |
0f2d19dd JB |
197 | { |
198 | if (!src) return SCM_BOOL_F; | |
199 | return scm_makfromstr (src, (scm_sizet) strlen (src), 0); | |
200 | } | |
201 | ||
1cc91f1b | 202 | |
0f2d19dd | 203 | SCM |
1bbd0b84 | 204 | scm_makfrom0str_opt (const char *src) |
0f2d19dd JB |
205 | { |
206 | return scm_makfrom0str (src); | |
207 | } | |
208 | ||
209 | ||
210 | ||
211 | ||
3b3b36dd | 212 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 GB |
213 | (SCM k, SCM chr), |
214 | "Returns a newly allocated string of\n" | |
215 | "length K. If CHR is given, then all elements of the string\n" | |
216 | "are initialized to CHR, otherwise the contents of the\n" | |
b450f070 | 217 | "STRING are unspecified.\n") |
1bbd0b84 | 218 | #define FUNC_NAME s_scm_make_string |
0f2d19dd JB |
219 | { |
220 | SCM res; | |
0f2d19dd | 221 | register long i; |
3b3b36dd | 222 | SCM_VALIDATE_INUM_MIN_COPY (1,k,0,i); |
0f2d19dd | 223 | res = scm_makstr (i, 0); |
6c951427 | 224 | if (!SCM_UNBNDP (chr)) |
0f2d19dd | 225 | { |
7866a09b | 226 | SCM_VALIDATE_CHAR (2,chr); |
6c951427 GH |
227 | { |
228 | unsigned char *dst = SCM_UCHARS (res); | |
7866a09b | 229 | char c = SCM_CHAR (chr); |
6c951427 GH |
230 | |
231 | memset (dst, c, i); | |
232 | } | |
0f2d19dd JB |
233 | } |
234 | return res; | |
235 | } | |
1bbd0b84 | 236 | #undef FUNC_NAME |
0f2d19dd | 237 | |
3b3b36dd | 238 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
6fa73e72 GB |
239 | (SCM string), |
240 | "Returns the number of characters in STRING") | |
1bbd0b84 | 241 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 242 | { |
6fa73e72 GB |
243 | SCM_VALIDATE_ROSTRING (1,string); |
244 | return SCM_MAKINUM (SCM_ROLENGTH (string)); | |
0f2d19dd | 245 | } |
1bbd0b84 | 246 | #undef FUNC_NAME |
0f2d19dd | 247 | |
bd9e24b3 | 248 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 GB |
249 | (SCM str, SCM k), |
250 | "Returns character K of STR using zero-origin indexing.\n" | |
251 | "K must be a valid index of STR.") | |
1bbd0b84 | 252 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 253 | { |
bd9e24b3 GH |
254 | int idx; |
255 | ||
256 | SCM_VALIDATE_ROSTRING (1, str); | |
257 | SCM_VALIDATE_INUM_COPY (2, k, idx); | |
258 | SCM_ASSERT_RANGE (2, k, idx >= 0 && idx < SCM_ROLENGTH (str)); | |
7866a09b | 259 | return SCM_MAKE_CHAR (SCM_ROUCHARS (str)[idx]); |
0f2d19dd | 260 | } |
1bbd0b84 | 261 | #undef FUNC_NAME |
0f2d19dd | 262 | |
3b3b36dd | 263 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 GB |
264 | (SCM str, SCM k, SCM chr), |
265 | "Stores CHR in element K of STRING and returns an unspecified value.\n" | |
266 | "K must be a valid index of STR.") | |
1bbd0b84 | 267 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 268 | { |
3b3b36dd GB |
269 | SCM_VALIDATE_RWSTRING (1,str); |
270 | SCM_VALIDATE_INUM_RANGE (2,k,0,SCM_LENGTH(str)); | |
7866a09b GB |
271 | SCM_VALIDATE_CHAR (3,chr); |
272 | SCM_UCHARS (str)[SCM_INUM (k)] = SCM_CHAR (chr); | |
0f2d19dd JB |
273 | return SCM_UNSPECIFIED; |
274 | } | |
1bbd0b84 | 275 | #undef FUNC_NAME |
0f2d19dd JB |
276 | |
277 | ||
278 | ||
3b3b36dd | 279 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
1bbd0b84 | 280 | (SCM str, SCM start, SCM end), |
6fa73e72 GB |
281 | "Returns a newly allocated string formed from the characters\n" |
282 | "of STR beginning with index START (inclusive) and ending with\n" | |
283 | "index END (exclusive).\n" | |
284 | "STR must be a string, START and END must be exact integers satisfying:\n\n" | |
285 | "0 <= START <= END <= (string-length STR).") | |
1bbd0b84 | 286 | #define FUNC_NAME s_scm_substring |
0f2d19dd JB |
287 | { |
288 | long l; | |
3b3b36dd GB |
289 | SCM_VALIDATE_ROSTRING (1,str); |
290 | SCM_VALIDATE_INUM (2,start); | |
291 | SCM_VALIDATE_INUM_DEF (3,end,SCM_ROLENGTH(str)); | |
5bff3127 GB |
292 | SCM_ASSERT_RANGE (2,start,SCM_INUM (start) <= SCM_ROLENGTH (str)); |
293 | SCM_ASSERT_RANGE (2,end,SCM_INUM (end) <= SCM_ROLENGTH (str)); | |
0f2d19dd | 294 | l = SCM_INUM (end)-SCM_INUM (start); |
1bbd0b84 | 295 | SCM_ASSERT (l >= 0, SCM_MAKINUM (l), SCM_OUTOFRANGE, FUNC_NAME); |
0f2d19dd JB |
296 | return scm_makfromstr (&SCM_ROCHARS (str)[SCM_INUM (start)], (scm_sizet)l, 0); |
297 | } | |
1bbd0b84 | 298 | #undef FUNC_NAME |
0f2d19dd | 299 | |
3b3b36dd | 300 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 GB |
301 | (SCM args), |
302 | "Returns a newly allocated string whose characters form the\n" | |
303 | "concatenation of the given strings, ARGS.") | |
1bbd0b84 | 304 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
305 | { |
306 | SCM res; | |
307 | register long i = 0; | |
308 | register SCM l, s; | |
a65b9c80 | 309 | register unsigned char *data; |
368cf54d | 310 | for (l = args;SCM_CONSP (l);) { |
0f2d19dd | 311 | s = SCM_CAR (l); |
3b3b36dd | 312 | SCM_VALIDATE_ROSTRING (SCM_ARGn,s); |
0f2d19dd JB |
313 | i += SCM_ROLENGTH (s); |
314 | l = SCM_CDR (l); | |
315 | } | |
1bbd0b84 | 316 | SCM_ASSERT (SCM_NULLP (l), args, SCM_ARGn, FUNC_NAME); |
0f2d19dd | 317 | res = scm_makstr (i, 0); |
a65b9c80 | 318 | data = SCM_UCHARS (res); |
0f2d19dd JB |
319 | for (l = args;SCM_NIMP (l);l = SCM_CDR (l)) { |
320 | s = SCM_CAR (l); | |
a65b9c80 | 321 | for (i = 0;i<SCM_ROLENGTH (s);i++) *data++ = SCM_ROUCHARS (s)[i]; |
0f2d19dd JB |
322 | } |
323 | return res; | |
324 | } | |
1bbd0b84 | 325 | #undef FUNC_NAME |
0f2d19dd | 326 | |
3b3b36dd | 327 | SCM_DEFINE (scm_make_shared_substring, "make-shared-substring", 1, 2, 0, |
1bbd0b84 | 328 | (SCM str, SCM frm, SCM to), |
b380b885 MD |
329 | "Return a shared substring of @var{str}. The semantics are the same as\n" |
330 | "for the @code{substring} function: the shared substring returned\n" | |
331 | "includes all of the text from @var{str} between indexes @var{start}\n" | |
332 | "(inclusive) and @var{end} (exclusive). If @var{end} is omitted, it\n" | |
333 | "defaults to the end of @var{str}. The shared substring returned by\n" | |
334 | "@code{make-shared-substring} occupies the same storage space as\n" | |
335 | "@var{str}.") | |
1bbd0b84 | 336 | #define FUNC_NAME s_scm_make_shared_substring |
0f2d19dd JB |
337 | { |
338 | long f; | |
339 | long t; | |
340 | SCM answer; | |
341 | SCM len_str; | |
342 | ||
3b3b36dd GB |
343 | SCM_VALIDATE_ROSTRING (1,str); |
344 | SCM_VALIDATE_INUM_DEF_COPY (2,frm,0,f); | |
345 | SCM_VALIDATE_INUM_DEF_COPY (3,to,SCM_ROLENGTH(str),t); | |
0f2d19dd | 346 | |
5bff3127 GB |
347 | SCM_ASSERT_RANGE (2,frm,(f >= 0)); |
348 | SCM_ASSERT_RANGE (3,to, (f <= t) && (t <= SCM_ROLENGTH (str))); | |
0f2d19dd JB |
349 | |
350 | SCM_NEWCELL (answer); | |
351 | SCM_NEWCELL (len_str); | |
352 | ||
353 | SCM_DEFER_INTS; | |
354 | if (SCM_SUBSTRP (str)) | |
355 | { | |
356 | long offset; | |
357 | offset = SCM_INUM (SCM_SUBSTR_OFFSET (str)); | |
358 | f += offset; | |
359 | t += offset; | |
360 | SCM_SETCAR (len_str, SCM_MAKINUM (f)); | |
361 | SCM_SETCDR (len_str, SCM_SUBSTR_STR (str)); | |
362 | SCM_SETCDR (answer, len_str); | |
363 | SCM_SETLENGTH (answer, t - f, scm_tc7_substring); | |
364 | } | |
365 | else | |
366 | { | |
367 | SCM_SETCAR (len_str, SCM_MAKINUM (f)); | |
368 | SCM_SETCDR (len_str, str); | |
369 | SCM_SETCDR (answer, len_str); | |
370 | SCM_SETLENGTH (answer, t - f, scm_tc7_substring); | |
371 | } | |
372 | SCM_ALLOW_INTS; | |
373 | return answer; | |
374 | } | |
1bbd0b84 | 375 | #undef FUNC_NAME |
1cc91f1b | 376 | |
0f2d19dd JB |
377 | void |
378 | scm_init_strings () | |
0f2d19dd JB |
379 | { |
380 | #include "strings.x" | |
381 | } | |
382 | ||
89e00824 ML |
383 | |
384 | /* | |
385 | Local Variables: | |
386 | c-file-style: "gnu" | |
387 | End: | |
388 | */ |