/* classes: h_files */

#ifndef SCM_STRINGS_H
#define SCM_STRINGS_H

/* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */



#include "libguile/__scm.h"



#define SCM_STRING_MAX_LENGTH ((SCM_T_BITS_MAX-255)/256)

#define SCM_I_MAKE_STRING_TAG(l) ((((scm_t_bits) (l)) << 8) + scm_tc7_string)
#define SCM_I_STRINGP(x) (!SCM_IMP (x) && (SCM_TYP7 (x) == scm_tc7_string))
#define SCM_I_STRING_UCHARS(x) ((unsigned char *) (SCM_CELL_WORD_1 (x)))
#define SCM_I_STRING_CHARS(x)  ((char *) (SCM_CELL_WORD_1 (x)))
#define SCM_I_STRING_LENGTH(x) ((size_t) (SCM_CELL_WORD_0 (x) >> 8))

#define SCM_STRINGP        SCM_I_STRINGP
#define SCM_STRING_CHARS   SCM_I_STRING_CHARS
#define SCM_STRING_UCHARS  SCM_I_STRING_UCHARS
#define SCM_STRING_LENGTH  SCM_I_STRING_LENGTH



SCM_API SCM scm_string_p (SCM x);
SCM_API SCM scm_string (SCM chrs);
SCM_API SCM scm_make_string (SCM k, SCM chr);
SCM_API SCM scm_string_length (SCM str);
SCM_API SCM scm_string_ref (SCM str, SCM k);
SCM_API SCM scm_string_set_x (SCM str, SCM k, SCM chr);
SCM_API SCM scm_substring (SCM str, SCM start, SCM end);
SCM_API SCM scm_string_append (SCM args);

SCM_API SCM scm_makfromstrs (int argc, char **argv);
SCM_API SCM scm_take_str (char *s, size_t len);
SCM_API SCM scm_take0str (char *s);
SCM_API SCM scm_mem2string (const char *src, size_t len);
SCM_API SCM scm_str2string (const char *src);
SCM_API SCM scm_makfrom0str (const char *src);
SCM_API SCM scm_makfrom0str_opt (const char *src);
SCM_API SCM scm_allocate_string (size_t len);

SCM_API int scm_is_string (SCM x);
SCM_API SCM scm_from_locale_string (const char *str);
SCM_API SCM scm_from_locale_stringn (const char *str, size_t len);
SCM_API SCM scm_take_locale_string (char *str);
SCM_API SCM scm_take_locale_stringn (char *str, size_t len);
SCM_API char *scm_to_locale_string (SCM str);
SCM_API char *scm_to_locale_stringn (SCM str, size_t *lenp);
SCM_API size_t scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len);

/* internal utility functions. */

SCM_API char **scm_i_allocate_string_pointers (SCM list);
SCM_API void scm_i_free_string_pointers (char **pointers);

SCM_API void scm_init_strings (void);

#endif  /* SCM_STRINGS_H */

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/