-/* 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, 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. */
-\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 unsigned 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_UCHARS (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 unsigned 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_UCHARS (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_ROUCHARS (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_UCHARS (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 unsigned 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_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;
-}
-
-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) 1995,1996,1998,2000,2001 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. */
+
+
+\f
+
+#include <string.h>
+
+#include "libguile/_scm.h"
+#include "libguile/chars.h"
+#include "libguile/root.h"
+#include "libguile/strings.h"
+#include "libguile/deprecation.h"
+#include "libguile/validate.h"
+
+\f
+
+/* {Strings}
+ */
+
+SCM_DEFINE (scm_string_p, "string?", 1, 0, 0,
+ (SCM obj),
+ "Return @code{#t} iff @var{obj} is a string, else returns\n"
+ "@code{#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 obj),
+ "Return @code{#t} if @var{obj} is either a string or a symbol,\n"
+ "otherwise return @code{#f}.")
+#define FUNC_NAME s_scm_read_only_string_p
+{
+ return SCM_BOOL(SCM_ROSTRINGP (obj));
+}
+#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"
+ "Return a newly allocated string composed of the arguments,\n"
+ "@var{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_allocate_string (i);
+ }
+
+ {
+ unsigned char *data = SCM_STRING_UCHARS (result);
+
+ while (!SCM_NULLP (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
+
+#if (SCM_DEBUG_DEPRECATED == 0)
+
+SCM
+scm_makstr (size_t len, int dummy)
+#define FUNC_NAME "scm_makstr"
+{
+ SCM s;
+ char *mem;
+
+ SCM_ASSERT_RANGE (1, scm_long2num (len), len <= SCM_STRING_MAX_LENGTH);
+
+ mem = (char *) scm_must_malloc (len + 1, FUNC_NAME);
+ mem[len] = 0;
+
+ SCM_NEWCELL (s);
+ SCM_SET_STRING_CHARS (s, mem);
+ SCM_SET_STRING_LENGTH (s, len);
+
+ return s;
+}
+#undef FUNC_NAME
+
+#endif /* SCM_DEBUG_DEPRECATED == 0 */
+
+/* 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_mem2string (argv[i], strlen (argv[i])), 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, size_t len)
+#define FUNC_NAME "scm_take_str"
+{
+ SCM answer;
+
+ SCM_ASSERT_RANGE (2, scm_ulong2num (len), len <= SCM_STRING_MAX_LENGTH);
+
+ SCM_NEWCELL (answer);
+ SCM_SET_STRING_CHARS (answer, s);
+ SCM_SET_STRING_LENGTH (answer, len);
+ scm_done_malloc (len + 1);
+
+ return answer;
+}
+#undef FUNC_NAME
+
+
+/* `s' must be a malloc'd string. See scm_take_str. */
+SCM
+scm_take0str (char *s)
+{
+ return scm_take_str (s, strlen (s));
+}
+
+#if (SCM_DEBUG_DEPRECATED == 0)
+
+SCM
+scm_makfromstr (const char *src, size_t len, int dummy SCM_UNUSED)
+{
+ scm_c_issue_deprecation_warning ("`scm_makfromstr' is deprecated. "
+ "Use `scm_mem2string' instead.");
+
+ return scm_mem2string (src, len);
+}
+
+#endif
+
+SCM
+scm_mem2string (const char *src, size_t len)
+{
+ SCM s = scm_allocate_string (len);
+ char *dst = SCM_STRING_CHARS (s);
+
+ while (len--)
+ *dst++ = *src++;
+ return s;
+}
+
+SCM
+scm_makfrom0str (const char *src)
+{
+ if (!src) return SCM_BOOL_F;
+ return scm_mem2string (src, strlen (src));
+}
+
+
+SCM
+scm_makfrom0str_opt (const char *src)
+{
+ return scm_makfrom0str (src);
+}
+
+
+SCM
+scm_allocate_string (size_t len)
+#define FUNC_NAME "scm_allocate_string"
+{
+ char *mem;
+ SCM s;
+
+ SCM_ASSERT_RANGE (1, scm_long2num (len), len <= SCM_STRING_MAX_LENGTH);
+
+ mem = (char *) scm_must_malloc (len + 1, FUNC_NAME);
+ mem[len] = 0;
+
+ SCM_NEWCELL (s);
+ SCM_SET_STRING_CHARS (s, mem);
+ SCM_SET_STRING_LENGTH (s, len);
+
+ return s;
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0,
+ (SCM k, SCM chr),
+ "Return a newly allocated string of\n"
+ "length @var{k}. If @var{chr} is given, then all elements of\n"
+ "the string are initialized to @var{chr}, otherwise the contents\n"
+ "of the @var{string} are unspecified.\n")
+#define FUNC_NAME s_scm_make_string
+{
+ if (SCM_INUMP (k))
+ {
+ long int i = SCM_INUM (k);
+ SCM res;
+
+ SCM_ASSERT_RANGE (1, k, i >= 0);
+
+ res = scm_allocate_string (i);
+ if (!SCM_UNBNDP (chr))
+ {
+ unsigned char *dst;
+
+ SCM_VALIDATE_CHAR (2, chr);
+
+ dst = SCM_STRING_UCHARS (res);
+ memset (dst, SCM_CHAR (chr), i);
+ }
+
+ return res;
+ }
+ else if (SCM_BIGP (k))
+ SCM_OUT_OF_RANGE (1, k);
+ else
+ SCM_WRONG_TYPE_ARG (1, k);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0,
+ (SCM string),
+ "Return the number of characters in @var{string}.")
+#define FUNC_NAME s_scm_string_length
+{
+ SCM_VALIDATE_STRING (1, string);
+ return SCM_MAKINUM (SCM_STRING_LENGTH (string));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0,
+ (SCM str, SCM k),
+ "Return character @var{k} of @var{str} using zero-origin\n"
+ "indexing. @var{k} must be a valid index of @var{str}.")
+#define FUNC_NAME s_scm_string_ref
+{
+ long idx;
+
+ SCM_VALIDATE_STRING (1, str);
+ SCM_VALIDATE_INUM_COPY (2, k, idx);
+ SCM_ASSERT_RANGE (2, k, idx >= 0 && idx < SCM_STRING_LENGTH (str));
+ return SCM_MAKE_CHAR (SCM_STRING_UCHARS (str)[idx]);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0,
+ (SCM str, SCM k, SCM chr),
+ "Store @var{chr} in element @var{k} of @var{str} and return\n"
+ "an unspecified value. @var{k} must be a valid index of\n"
+ "@var{str}.")
+#define FUNC_NAME s_scm_string_set_x
+{
+#if (SCM_DEBUG_DEPRECATED == 0)
+ SCM_VALIDATE_RWSTRING (1, str);
+#else
+ SCM_VALIDATE_STRING (1, str);
+#endif
+ SCM_VALIDATE_INUM_RANGE (2,k,0,SCM_STRING_LENGTH(str));
+ SCM_VALIDATE_CHAR (3,chr);
+ SCM_STRING_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),
+ "Return a newly allocated string formed from the characters\n"
+ "of @var{str} beginning with index @var{start} (inclusive) and\n"
+ "ending with index @var{end} (exclusive).\n"
+ "@var{str} must be a string, @var{start} and @var{end} must be\n"
+ "exact integers satisfying:\n\n"
+ "0 <= @var{start} <= @var{end} <= (string-length @var{str}).")
+#define FUNC_NAME s_scm_substring
+{
+ long int from;
+ long int to;
+ SCM substr;
+
+ SCM_VALIDATE_STRING (1, str);
+ SCM_VALIDATE_INUM (2, start);
+ SCM_VALIDATE_INUM_DEF (3, end, SCM_STRING_LENGTH (str));
+
+ from = SCM_INUM (start);
+ SCM_ASSERT_RANGE (2, start, 0 <= from && from <= SCM_STRING_LENGTH (str));
+ to = SCM_INUM (end);
+ SCM_ASSERT_RANGE (3, end, from <= to && to <= SCM_STRING_LENGTH (str));
+
+ substr = scm_mem2string (&SCM_STRING_CHARS (str)[from], to - from);
+ scm_remember_upto_here_1 (str);
+ return substr;
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1,
+ (SCM args),
+ "Return a newly allocated string whose characters form the\n"
+ "concatenation of the given strings, @var{args}.")
+#define FUNC_NAME s_scm_string_append
+{
+ SCM res;
+ size_t 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_STRING (SCM_ARGn,s);
+ i += SCM_STRING_LENGTH (s);
+ }
+ res = scm_allocate_string (i);
+ data = SCM_STRING_UCHARS (res);
+ for (l = args; !SCM_NULLP (l);l = SCM_CDR (l)) {
+ s = SCM_CAR (l);
+ for (i = 0;i<SCM_STRING_LENGTH (s);i++) *data++ = SCM_STRING_UCHARS (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 start, SCM end),
+ "Return a shared substring of @var{str}. The arguments are the\n"
+ "same as for the @code{substring} function: the shared substring\n"
+ "returned includes all of the text from @var{str} between\n"
+ "indexes @var{start} (inclusive) and @var{end} (exclusive). If\n"
+ "@var{end} is omitted, it defaults to the end of @var{str}. The\n"
+ "shared substring returned by @code{make-shared-substring}\n"
+ "occupies the same storage space as @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,start,0,f);
+ SCM_VALIDATE_INUM_DEF_COPY (3,end,SCM_ROLENGTH(str),t);
+
+ SCM_ASSERT_RANGE (2,start,(f >= 0));
+ SCM_ASSERT_RANGE (3,end, (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 ()
+{
+ scm_nullstr = scm_allocate_string (0);
+
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/strings.x"
+#endif
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff