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-rw-r--r--libguile/strings.c473
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diff --git a/libguile/strings.c b/libguile/strings.c
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+++ b/libguile/strings.c
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+/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+
+#include <stdio.h>
+#include "_scm.h"
+
+
+
+/* {Strings}
+ */
+
+SCM_PROC(s_string_p, "string?", 1, 0, 0, scm_string_p);
+#ifdef __STDC__
+SCM
+scm_string_p (SCM x)
+#else
+SCM
+scm_string_p (x)
+ SCM x;
+#endif
+{
+ if (SCM_IMP (x))
+ return SCM_BOOL_F;
+ return SCM_STRINGP (x) ? SCM_BOOL_T : SCM_BOOL_F;
+}
+
+SCM_PROC(s_read_only_string_p, "read-only-string?", 1, 0, 0, scm_read_only_string_p);
+#ifdef __STDC__
+SCM
+scm_read_only_string_p (SCM x)
+#else
+SCM
+scm_read_only_string_p (x)
+ SCM x;
+#endif
+{
+ if (SCM_IMP (x))
+ return SCM_BOOL_F;
+ return SCM_ROSTRINGP (x) ? SCM_BOOL_T : SCM_BOOL_F;
+}
+
+SCM_PROC(s_list_to_string, "list->string", 1, 0, 0, scm_string);
+SCM_PROC(s_string, "string", 0, 0, 1, scm_string);
+#ifdef __STDC__
+SCM
+scm_string (SCM chrs)
+#else
+SCM
+scm_string (chrs)
+ SCM chrs;
+#endif
+{
+ SCM res;
+ register char *data;
+ long i;
+ long len;
+ SCM_DEFER_INTS;
+ i = scm_ilength (chrs);
+ if (i < 0)
+ {
+ SCM_ALLOW_INTS;
+ SCM_ASSERT (0, chrs, SCM_ARG1, s_string);
+ }
+ len = 0;
+ {
+ SCM s;
+
+ for (len = 0, s = chrs; s != SCM_EOL; s = SCM_CDR (s))
+ if (SCM_ICHRP (SCM_CAR (s)))
+ len += 1;
+ else if (SCM_NIMP (SCM_CAR (s)) && SCM_ROSTRINGP (SCM_CAR (s)))
+ len += SCM_ROLENGTH (SCM_CAR (s));
+ else
+ {
+ SCM_ALLOW_INTS;
+ SCM_ASSERT (0, s, SCM_ARG1, s_string);
+ }
+ }
+ res = scm_makstr (len, 0);
+ data = SCM_CHARS (res);
+ for (;SCM_NNULLP (chrs);chrs = SCM_CDR (chrs))
+ {
+ if (SCM_ICHRP (SCM_CAR (chrs)))
+ *data++ = SCM_ICHR (SCM_CAR (chrs));
+ else
+ {
+ int l;
+ char * c;
+ l = SCM_ROLENGTH (SCM_CAR (chrs));
+ c = SCM_ROCHARS (SCM_CAR (chrs));
+ while (l)
+ {
+ --l;
+ *data++ = *c++;
+ }
+ }
+ }
+ SCM_ALLOW_INTS;
+ return res;
+}
+
+#ifdef __STDC__
+SCM
+scm_makstr (long len, int slots)
+#else
+SCM
+scm_makstr (len, slots)
+ long len;
+ int slots;
+#endif
+{
+ SCM s;
+ SCM * mem;
+ SCM_NEWCELL (s);
+ --slots;
+ SCM_REDEFER_INTS;
+ mem = (SCM *)scm_must_malloc (sizeof (SCM) * (slots + 1) + len + 1,
+ s_string);
+ if (slots >= 0)
+ {
+ int x;
+ mem[slots] = (SCM)mem;
+ for (x = 0; x < slots; ++x)
+ mem[x] = SCM_BOOL_F;
+ }
+ SCM_SETCHARS (s, (char *) (mem + slots + 1));
+ SCM_SETLENGTH (s, len, scm_tc7_string);
+ SCM_REALLOW_INTS;
+ SCM_CHARS (s)[len] = 0;
+ return s;
+}
+
+/* converts C scm_array of strings to SCM scm_list of strings. */
+/* If argc < 0, a null terminated scm_array is assumed. */
+#ifdef __STDC__
+SCM
+scm_makfromstrs (int argc, char **argv)
+#else
+SCM
+scm_makfromstrs (argc, argv)
+ int argc;
+ char **argv;
+#endif
+{
+ int i = argc;
+ SCM lst = SCM_EOL;
+ if (0 > i)
+ for (i = 0; argv[i]; i++);
+ while (i--)
+ lst = scm_cons (scm_makfromstr (argv[i], (scm_sizet) strlen (argv[i]), 0), lst);
+ return lst;
+}
+
+
+#ifdef __STDC__
+SCM
+scm_take0str (char * it)
+#else
+SCM
+scm_take0str (it)
+ char * it;
+#endif
+{
+ SCM answer;
+ SCM_NEWCELL (answer);
+ SCM_DEFER_INTS;
+ SCM_SETLENGTH (answer, strlen (it), scm_tc7_string);
+ SCM_SETCHARS (answer, it);
+ SCM_ALLOW_INTS;
+ return answer;
+}
+
+#ifdef __STDC__
+SCM
+scm_makfromstr (const char *src, scm_sizet len, int slots)
+#else
+SCM
+scm_makfromstr (src, len, slots)
+ const char *src;
+ scm_sizet len;
+ int slots;
+#endif
+{
+ SCM s;
+ register char *dst;
+ s = scm_makstr ((long) len, slots);
+ dst = SCM_CHARS (s);
+ while (len--)
+ *dst++ = *src++;
+ return s;
+}
+
+
+#ifdef __STDC__
+SCM
+scm_makfrom0str (char *src)
+#else
+SCM
+scm_makfrom0str (src)
+ char *src;
+#endif
+{
+ if (!src) return SCM_BOOL_F;
+ return scm_makfromstr (src, (scm_sizet) strlen (src), 0);
+}
+
+#ifdef __STDC__
+SCM
+scm_makfrom0str_opt (char *src)
+#else
+SCM
+scm_makfrom0str_opt (src)
+ char *src;
+#endif
+{
+ return scm_makfrom0str (src);
+}
+
+
+
+
+SCM_PROC(s_make_string, "make-string", 1, 1, 0, scm_make_string);
+#ifdef __STDC__
+SCM
+scm_make_string (SCM k, SCM chr)
+#else
+SCM
+scm_make_string (k, chr)
+ SCM k;
+ SCM chr;
+#endif
+{
+ SCM res;
+ register char *dst;
+ register long i;
+ SCM_ASSERT (SCM_INUMP (k) && (k >= 0), k, SCM_ARG1, s_make_string);
+ i = SCM_INUM (k);
+ res = scm_makstr (i, 0);
+ dst = SCM_CHARS (res);
+ if SCM_ICHRP (chr)
+ {
+ char c = SCM_ICHR (chr);
+ for (i--;i >= 0;i--)
+ {
+ dst[i] = c;
+ }
+ }
+ return res;
+}
+
+SCM_PROC(s_string_length, "string-length", 1, 0, 0, scm_string_length);
+#ifdef __STDC__
+SCM
+scm_string_length (SCM str)
+#else
+SCM
+scm_string_length (str)
+ SCM str;
+#endif
+{
+ SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_length);
+ return SCM_MAKINUM (SCM_ROLENGTH (str));
+}
+
+SCM_PROC(s_string_ref, "string-ref", 1, 1, 0, scm_string_ref);
+#ifdef __STDC__
+SCM
+scm_string_ref (SCM str, SCM k)
+#else
+SCM
+scm_string_ref (str, k)
+ SCM str;
+ SCM k;
+#endif
+{
+ SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_string_ref);
+ if (k == SCM_UNDEFINED)
+ k = SCM_MAKINUM (0);
+ SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG2, s_string_ref);
+ SCM_ASSERT (SCM_INUM (k) < SCM_ROLENGTH (str) && SCM_INUM (k) >= 0, k, SCM_OUTOFRANGE, s_string_ref);
+ return SCM_MAKICHR (SCM_ROCHARS (str)[SCM_INUM (k)]);
+}
+
+SCM_PROC(s_string_set_x, "string-set!", 3, 0, 0, scm_string_set_x);
+#ifdef __STDC__
+SCM
+scm_string_set_x (SCM str, SCM k, SCM chr)
+#else
+SCM
+scm_string_set_x (str, k, chr)
+ SCM str;
+ SCM k;
+ SCM chr;
+#endif
+{
+ SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_string_set_x);
+ SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG2, s_string_set_x);
+ SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG3, s_string_set_x);
+ SCM_ASSERT (SCM_INUM (k) < SCM_LENGTH (str) && SCM_INUM (k) >= 0, k, SCM_OUTOFRANGE, s_string_set_x);
+ SCM_CHARS (str)[SCM_INUM (k)] = SCM_ICHR (chr);
+ return SCM_UNSPECIFIED;
+}
+
+
+
+SCM_PROC(s_substring, "substring", 2, 1, 0, scm_substring);
+#ifdef __STDC__
+SCM
+scm_substring (SCM str, SCM start, SCM end)
+#else
+SCM
+scm_substring (str, start, end)
+ SCM str;
+ SCM start;
+ SCM end;
+#endif
+{
+ long l;
+ SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str),
+ str, SCM_ARG1, s_substring);
+ SCM_ASSERT (SCM_INUMP (start), start, SCM_ARG2, s_substring);
+ if (end == SCM_UNDEFINED)
+ end = SCM_MAKINUM (SCM_ROLENGTH (str));
+ SCM_ASSERT (SCM_INUMP (end), end, SCM_ARG3, s_substring);
+ SCM_ASSERT (SCM_INUM (start) <= SCM_ROLENGTH (str), start, SCM_OUTOFRANGE, s_substring);
+ SCM_ASSERT (SCM_INUM (end) <= SCM_ROLENGTH (str), end, SCM_OUTOFRANGE, s_substring);
+ l = SCM_INUM (end)-SCM_INUM (start);
+ SCM_ASSERT (l >= 0, SCM_MAKINUM (l), SCM_OUTOFRANGE, s_substring);
+ return scm_makfromstr (&SCM_ROCHARS (str)[SCM_INUM (start)], (scm_sizet)l, 0);
+}
+
+SCM_PROC(s_string_append, "string-append", 0, 0, 1, scm_string_append);
+#ifdef __STDC__
+SCM
+scm_string_append (SCM args)
+#else
+SCM
+scm_string_append (args)
+ SCM args;
+#endif
+{
+ SCM res;
+ register long i = 0;
+ register SCM l, s;
+ register char *data;
+ for (l = args;SCM_NIMP (l);) {
+ SCM_ASSERT (SCM_CONSP (l), l, SCM_ARGn, s_string_append);
+ s = SCM_CAR (l);
+ SCM_ASSERT (SCM_NIMP (s) && SCM_ROSTRINGP (s),
+ s, SCM_ARGn, s_string_append);
+ i += SCM_ROLENGTH (s);
+ l = SCM_CDR (l);
+ }
+ SCM_ASSERT (SCM_NULLP (l), args, SCM_ARGn, s_string_append);
+ res = scm_makstr (i, 0);
+ data = SCM_CHARS (res);
+ for (l = args;SCM_NIMP (l);l = SCM_CDR (l)) {
+ s = SCM_CAR (l);
+ for (i = 0;i<SCM_ROLENGTH (s);i++) *data++ = SCM_ROCHARS (s)[i];
+ }
+ return res;
+}
+
+SCM_PROC(s_make_shared_substring, "make-shared-substring", 1, 2, 0, scm_make_shared_substring);
+#ifdef __STDC__
+SCM
+scm_make_shared_substring (SCM str, SCM frm, SCM to)
+#else
+SCM
+scm_make_shared_substring (str, frm, to)
+ SCM str;
+ SCM frm;
+ SCM to;
+#endif
+{
+ long f;
+ long t;
+ SCM answer;
+ SCM len_str;
+
+ SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_make_shared_substring);
+
+ if (frm == SCM_UNDEFINED)
+ frm = SCM_MAKINUM (0);
+ else
+ SCM_ASSERT (SCM_INUMP (frm), frm, SCM_ARG2, s_make_shared_substring);
+
+ if (to == SCM_UNDEFINED)
+ to = SCM_MAKINUM (SCM_ROLENGTH (str));
+ else
+ SCM_ASSERT (SCM_INUMP (to), to, SCM_ARG3, s_make_shared_substring);
+
+ f = SCM_INUM (frm);
+ t = SCM_INUM (to);
+ SCM_ASSERT ((f >= 0), frm, SCM_OUTOFRANGE, s_make_shared_substring);
+ SCM_ASSERT ((f <= t) && (t <= SCM_ROLENGTH (str)), to, SCM_OUTOFRANGE, s_make_shared_substring);
+
+ SCM_NEWCELL (answer);
+ SCM_NEWCELL (len_str);
+
+ SCM_DEFER_INTS;
+ if (SCM_SUBSTRP (str))
+ {
+ long offset;
+ offset = SCM_INUM (SCM_SUBSTR_OFFSET (str));
+ f += offset;
+ t += offset;
+ SCM_SETCAR (len_str, SCM_MAKINUM (f));
+ SCM_SETCDR (len_str, SCM_SUBSTR_STR (str));
+ SCM_SETCDR (answer, len_str);
+ SCM_SETLENGTH (answer, t - f, scm_tc7_substring);
+ }
+ else
+ {
+ SCM_SETCAR (len_str, SCM_MAKINUM (f));
+ SCM_SETCDR (len_str, str);
+ SCM_SETCDR (answer, len_str);
+ SCM_SETLENGTH (answer, t - f, scm_tc7_substring);
+ }
+ SCM_ALLOW_INTS;
+ return answer;
+}
+
+#ifdef __STDC__
+void
+scm_init_strings (void)
+#else
+void
+scm_init_strings ()
+#endif
+{
+#include "strings.x"
+}
+