-/* 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.
- */
-\f
-
-#include <stdio.h>
-#include "_scm.h"
-#include "chars.h"
-
-#include "strings.h"
-\f
-
-/* {Strings}
- */
-
-SCM_PROC(s_string_p, "string?", 1, 0, 0, scm_string_p);
-
-SCM
-scm_string_p (x)
- SCM x;
-{
- 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);
-
-SCM
-scm_read_only_string_p (x)
- SCM x;
-{
- 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);
-
-SCM
-scm_string (chrs)
- SCM chrs;
-{
- 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;
-}
-
-
-SCM
-scm_makstr (len, slots)
- long len;
- int slots;
-{
- 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. */
-
-SCM
-scm_makfromstrs (argc, argv)
- int argc;
- char **argv;
-{
- 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;
-}
-
-
-
-SCM
-scm_take0str (it)
- char * it;
-{
- 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;
-}
-
-
-SCM
-scm_makfromstr (src, len, slots)
- const char *src;
- scm_sizet len;
- int slots;
-{
- SCM s;
- register char *dst;
- s = scm_makstr ((long) len, slots);
- dst = SCM_CHARS (s);
- while (len--)
- *dst++ = *src++;
- return s;
-}
-
-
-
-SCM
-scm_makfrom0str (src)
- const char *src;
-{
- if (!src) return SCM_BOOL_F;
- return scm_makfromstr (src, (scm_sizet) strlen (src), 0);
-}
-
-
-SCM
-scm_makfrom0str_opt (src)
- const char *src;
-{
- return scm_makfrom0str (src);
-}
-
-
-
-
-SCM_PROC(s_make_string, "make-string", 1, 1, 0, scm_make_string);
-
-SCM
-scm_make_string (k, chr)
- SCM k;
- SCM chr;
-{
- 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);
-
-SCM
-scm_string_length (str)
- SCM str;
-{
- 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);
-
-SCM
-scm_string_ref (str, k)
- SCM str;
- SCM k;
-{
- 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);
-
-SCM
-scm_string_set_x (str, k, chr)
- SCM str;
- SCM k;
- SCM chr;
-{
- 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);
-
-SCM
-scm_substring (str, start, end)
- SCM str;
- SCM start;
- SCM end;
-{
- 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);
-
-SCM
-scm_string_append (args)
- SCM args;
-{
- 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);
-
-SCM
-scm_make_shared_substring (str, frm, to)
- SCM str;
- SCM frm;
- SCM to;
-{
- 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;
-}
-
-
-void
-scm_init_strings ()
-{
-#include "strings.x"
-}
-
+/* Copyright (C) 1995,1996,1998,2000 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, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 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. */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+ gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
+
+\f
+
+#include <stdio.h>
+#include <string.h>
+
+#include "libguile/_scm.h"
+#include "libguile/chars.h"
+
+#include "libguile/strings.h"
+#include "libguile/validate.h"
+\f
+
+/* {Strings}
+ */
+
+SCM_DEFINE (scm_string_p, "string?", 1, 0, 0,
+ (SCM obj),
+ "Returns #t iff OBJ is a string, else returns #f.")
+#define FUNC_NAME s_scm_string_p
+{
+ return SCM_BOOL (SCM_STRINGP (obj));
+}
+#undef FUNC_NAME
+
+#if SCM_DEBUG_DEPRECATED == 0
+
+/* The concept of read-only strings will disappear in next release
+ * of Guile.
+ */
+
+SCM_DEFINE (scm_read_only_string_p, "read-only-string?", 1, 0, 0,
+ (SCM x),
+ "Return true if OBJ can be read as a string,\n\n"
+ "This illustrates the difference between @code{string?} and\n"
+ "@code{read-only-string?}:\n\n"
+ "@example\n"
+ "(string? \"a string\") @result{} #t\n"
+ "(string? 'a-symbol) @result{} #f\n\n"
+ "(read-only-string? \"a string\") @result{} #t\n"
+ "(read-only-string? 'a-symbol) @result{} #t\n"
+ "@end example")
+#define FUNC_NAME s_scm_read_only_string_p
+{
+ return SCM_BOOL(SCM_ROSTRINGP (x));
+}
+#undef FUNC_NAME
+
+#endif /* DEPRECATED */
+
+SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string);
+
+SCM_DEFINE (scm_string, "string", 0, 0, 1,
+ (SCM chrs),
+ "@deffnx primitive list->string chrs\n"
+ "Returns a newly allocated string composed of the arguments, CHRS.")
+#define FUNC_NAME s_scm_string
+{
+ SCM result;
+
+ {
+ long i = scm_ilength (chrs);
+
+ SCM_ASSERT (i >= 0, chrs, SCM_ARGn, FUNC_NAME);
+ result = scm_makstr (i, 0);
+ }
+
+ {
+ unsigned char *data = SCM_UCHARS (result);
+
+ while (SCM_NNULLP (chrs))
+ {
+ SCM elt = SCM_CAR (chrs);
+
+ SCM_VALIDATE_CHAR (SCM_ARGn, elt);
+ *data++ = SCM_CHAR (elt);
+ chrs = SCM_CDR (chrs);
+ }
+ }
+ return result;
+}
+#undef FUNC_NAME
+
+SCM
+scm_makstr (long len, int dummy)
+{
+ SCM s;
+ char *mem = (char *) scm_must_malloc (len + 1, "scm_makstr");
+
+ mem[len] = 0;
+ SCM_NEWCELL (s);
+ SCM_SETCHARS (s, mem);
+ SCM_SETLENGTH (s, len, scm_tc7_string);
+
+ return s;
+}
+
+/* converts C scm_array of strings to SCM scm_list of strings. */
+/* If argc < 0, a null terminated scm_array is assumed. */
+
+SCM
+scm_makfromstrs (int argc, char **argv)
+{
+ 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;
+}
+
+
+/* This function must only be applied to memory obtained via malloc,
+ since the GC is going to apply `free' to it when the string is
+ dropped.
+
+ Also, s[len] must be `\0', since we promise that strings are
+ null-terminated. Perhaps we could handle non-null-terminated
+ strings by claiming they're shared substrings of a string we just
+ made up. */
+SCM
+scm_take_str (char *s, int len)
+{
+ SCM answer;
+ SCM_NEWCELL (answer);
+ SCM_DEFER_INTS;
+ SCM_SETLENGTH (answer, len, scm_tc7_string);
+ scm_done_malloc (len + 1);
+ SCM_SETCHARS (answer, s);
+ SCM_ALLOW_INTS;
+ return answer;
+}
+
+/* `s' must be a malloc'd string. See scm_take_str. */
+SCM
+scm_take0str (char *s)
+{
+ return scm_take_str (s, strlen (s));
+}
+
+SCM
+scm_makfromstr (const char *src, scm_sizet len, int dummy)
+{
+ SCM s = scm_makstr (len, 0);
+ char *dst = SCM_CHARS (s);
+
+ while (len--)
+ *dst++ = *src++;
+ return s;
+}
+
+SCM
+scm_makfrom0str (const char *src)
+{
+ if (!src) return SCM_BOOL_F;
+ return scm_makfromstr (src, (scm_sizet) strlen (src), 0);
+}
+
+
+SCM
+scm_makfrom0str_opt (const char *src)
+{
+ return scm_makfrom0str (src);
+}
+
+
+
+
+SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0,
+ (SCM k, SCM chr),
+ "Returns a newly allocated string of\n"
+ "length K. If CHR is given, then all elements of the string\n"
+ "are initialized to CHR, otherwise the contents of the\n"
+ "STRING are unspecified.\n")
+#define FUNC_NAME s_scm_make_string
+{
+ SCM res;
+ register long i;
+ SCM_VALIDATE_INUM_MIN_COPY (1,k,0,i);
+ res = scm_makstr (i, 0);
+ if (!SCM_UNBNDP (chr))
+ {
+ SCM_VALIDATE_CHAR (2,chr);
+ {
+ unsigned char *dst = SCM_UCHARS (res);
+ char c = SCM_CHAR (chr);
+
+ memset (dst, c, i);
+ }
+ }
+ return res;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0,
+ (SCM string),
+ "Returns the number of characters in STRING")
+#define FUNC_NAME s_scm_string_length
+{
+ SCM_VALIDATE_STRINGORSUBSTR (1, string);
+ return SCM_MAKINUM (SCM_LENGTH (string));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0,
+ (SCM str, SCM k),
+ "Returns character K of STR using zero-origin indexing.\n"
+ "K must be a valid index of STR.")
+#define FUNC_NAME s_scm_string_ref
+{
+ int idx;
+
+ SCM_VALIDATE_STRINGORSUBSTR (1, str);
+ SCM_VALIDATE_INUM_COPY (2, k, idx);
+ SCM_ASSERT_RANGE (2, k, idx >= 0 && idx < SCM_ROLENGTH (str));
+ return SCM_MAKE_CHAR (SCM_ROUCHARS (str)[idx]);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0,
+ (SCM str, SCM k, SCM chr),
+ "Stores CHR in element K of STRING and returns an unspecified value.\n"
+ "K must be a valid index of STR.")
+#define FUNC_NAME s_scm_string_set_x
+{
+ SCM_VALIDATE_RWSTRING (1,str);
+ SCM_VALIDATE_INUM_RANGE (2,k,0,SCM_LENGTH(str));
+ SCM_VALIDATE_CHAR (3,chr);
+ SCM_UCHARS (str)[SCM_INUM (k)] = SCM_CHAR (chr);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_substring, "substring", 2, 1, 0,
+ (SCM str, SCM start, SCM end),
+ "Returns a newly allocated string formed from the characters\n"
+ "of STR beginning with index START (inclusive) and ending with\n"
+ "index END (exclusive).\n"
+ "STR must be a string, START and END must be exact integers satisfying:\n\n"
+ "0 <= START <= END <= (string-length STR).")
+#define FUNC_NAME s_scm_substring
+{
+ long int from;
+ long int to;
+
+ SCM_VALIDATE_STRINGORSUBSTR (1, str);
+ SCM_VALIDATE_INUM (2, start);
+ SCM_VALIDATE_INUM_DEF (3, end, SCM_ROLENGTH (str));
+
+ from = SCM_INUM (start);
+ SCM_ASSERT_RANGE (2, start, 0 <= from && from <= SCM_ROLENGTH (str));
+ to = SCM_INUM (end);
+ SCM_ASSERT_RANGE (3, end, from <= to && to <= SCM_ROLENGTH (str));
+
+ return scm_makfromstr (&SCM_ROCHARS (str)[from], (scm_sizet) (to - from), 0);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1,
+ (SCM args),
+ "Returns a newly allocated string whose characters form the\n"
+ "concatenation of the given strings, ARGS.")
+#define FUNC_NAME s_scm_string_append
+{
+ SCM res;
+ register long i = 0;
+ register SCM l, s;
+ register unsigned char *data;
+
+ SCM_VALIDATE_REST_ARGUMENT (args);
+ for (l = args; !SCM_NULLP (l); l = SCM_CDR (l)) {
+ s = SCM_CAR (l);
+ SCM_VALIDATE_STRINGORSUBSTR (SCM_ARGn,s);
+ i += SCM_ROLENGTH (s);
+ }
+ res = scm_makstr (i, 0);
+ data = SCM_UCHARS (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_ROUCHARS (s)[i];
+ }
+ return res;
+}
+#undef FUNC_NAME
+
+#if SCM_DEBUG_DEPRECATED == 0
+
+/* Explicit shared substrings will disappear from Guile.
+ *
+ * Instead, "normal" strings will be implemented using sharing
+ * internally, combined with a copy-on-write strategy.
+ */
+
+SCM_DEFINE (scm_make_shared_substring, "make-shared-substring", 1, 2, 0,
+ (SCM str, SCM frm, SCM to),
+ "Return a shared substring of @var{str}. The semantics are the same as\n"
+ "for the @code{substring} function: the shared substring returned\n"
+ "includes all of the text from @var{str} between indexes @var{start}\n"
+ "(inclusive) and @var{end} (exclusive). If @var{end} is omitted, it\n"
+ "defaults to the end of @var{str}. The shared substring returned by\n"
+ "@code{make-shared-substring} occupies the same storage space as\n"
+ "@var{str}.")
+#define FUNC_NAME s_scm_make_shared_substring
+{
+ long f;
+ long t;
+ SCM answer;
+ SCM len_str;
+
+ SCM_VALIDATE_ROSTRING (1,str);
+ SCM_VALIDATE_INUM_DEF_COPY (2,frm,0,f);
+ SCM_VALIDATE_INUM_DEF_COPY (3,to,SCM_ROLENGTH(str),t);
+
+ SCM_ASSERT_RANGE (2,frm,(f >= 0));
+ SCM_ASSERT_RANGE (3,to, (f <= t) && (t <= SCM_ROLENGTH (str)));
+
+ 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;
+}
+#undef FUNC_NAME
+
+#endif /* DEPRECATED */
+
+void
+scm_init_strings ()
+{
+#include "libguile/strings.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff