/* GLIB - Library of useful routines for C programming
 * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

/*
 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GLib Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GLib at ftp://ftp.gtk.org/pub/gtk/.
 */

#ifndef __G_STRING_H__
#define __G_STRING_H__

#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
#error "Only <glib.h> can be included directly."
#endif

#include <glib/gtypes.h>
#include <glib/gunicode.h>
#include <glib/gbytes.h>
#include <glib/gutils.h>  /* for G_CAN_INLINE */
#include <glib/gstrfuncs.h>
#include <string.h>

G_BEGIN_DECLS

#define G_STRING_PREALLOC 64

typedef struct _GString         GString;

struct _GString
{
  gchar  *str;
  gsize len;
  gsize allocated_len;
  char buf[G_STRING_PREALLOC];
};

GLIB_AVAILABLE_IN_ALL
GString*     g_string_new               (const gchar     *init);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_new_len           (const gchar     *init,
                                         gssize           len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_sized_new         (gsize            dfl_size);
GLIB_AVAILABLE_IN_ALL
gchar*       g_string_free              (GString         *string,
                                         gboolean         free_segment);
GLIB_AVAILABLE_IN_2_34
GBytes*      g_string_free_to_bytes     (GString         *string);
GLIB_AVAILABLE_IN_ALL
gboolean     g_string_equal             (const GString   *v,
                                         const GString   *v2);
GLIB_AVAILABLE_IN_ALL
guint        g_string_hash              (const GString   *str);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_assign            (GString         *string,
                                         const gchar     *rval);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_truncate          (GString         *string,
                                         gsize            len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_set_size          (GString         *string,
                                         gsize            len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_insert_len        (GString         *string,
                                         gssize           pos,
                                         const gchar     *val,
                                         gssize           len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_append            (GString         *string,
                                         const gchar     *val);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_append_len        (GString         *string,
                                         const gchar     *val,
                                         gssize           len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_append_c          (GString         *string,
                                         gchar            c);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_append_unichar    (GString         *string,
                                         gunichar         wc);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_prepend           (GString         *string,
                                         const gchar     *val);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_prepend_c         (GString         *string,
                                         gchar            c);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_prepend_unichar   (GString         *string,
                                         gunichar         wc);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_prepend_len       (GString         *string,
                                         const gchar     *val,
                                         gssize           len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_insert            (GString         *string,
                                         gssize           pos,
                                         const gchar     *val);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_insert_c          (GString         *string,
                                         gssize           pos,
                                         gchar            c);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_insert_unichar    (GString         *string,
                                         gssize           pos,
                                         gunichar         wc);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_overwrite         (GString         *string,
                                         gsize            pos,
                                         const gchar     *val);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_overwrite_len     (GString         *string,
                                         gsize            pos,
                                         const gchar     *val,
                                         gssize           len);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_erase             (GString         *string,
                                         gssize           pos,
                                         gssize           len);
GLIB_AVAILABLE_IN_2_68
guint         g_string_replace          (GString         *string,
                                         const gchar     *find,
                                         const gchar     *replace,
                                         guint            limit);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_ascii_down        (GString         *string);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_ascii_up          (GString         *string);
GLIB_AVAILABLE_IN_ALL
void         g_string_vprintf           (GString         *string,
                                         const gchar     *format,
                                         va_list          args)
                                         G_GNUC_PRINTF(2, 0);
GLIB_AVAILABLE_IN_ALL
void         g_string_printf            (GString         *string,
                                         const gchar     *format,
                                         ...) G_GNUC_PRINTF (2, 3);
GLIB_AVAILABLE_IN_ALL
void         g_string_append_vprintf    (GString         *string,
                                         const gchar     *format,
                                         va_list          args)
                                         G_GNUC_PRINTF(2, 0);
GLIB_AVAILABLE_IN_ALL
void         g_string_append_printf     (GString         *string,
                                         const gchar     *format,
                                         ...) G_GNUC_PRINTF (2, 3);
GLIB_AVAILABLE_IN_ALL
GString*     g_string_append_uri_escaped (GString         *string,
                                          const gchar     *unescaped,
                                          const gchar     *reserved_chars_allowed,
                                          gboolean         allow_utf8);

GLIB_AVAILABLE_IN_2_76
void         g_string_init            (GString            *string);

GLIB_AVAILABLE_IN_2_76
char *       g_string_clear           (GString            *string,
                                       gboolean            free_segment);

#ifndef __GTK_DOC_IGNORE__

#ifdef G_CAN_INLINE
G_ALWAYS_INLINE
static inline void
g_string_init_inline (GString *string)
{
  string->str = string->buf;
  string->len = 0;
  string->allocated_len = G_STRING_PREALLOC;
  string->str[0] = 0;
}
#define g_string_init(gstr) g_string_init_inline (gstr)

G_ALWAYS_INLINE
static inline char *
g_string_clear_inline (GString  *string,
                       gboolean  free_segment)
{
  char *segment;

  if (free_segment)
    {
      if (string->str != string->buf)
        g_free (string->str);
      segment = NULL;
    }
  else
    {
      if (string->str != string->buf)
        segment = string->str;
      else
        segment = (char *) g_memdup2 (string->str, string->len + 1);
    }

  g_string_init (string);

  return segment;
}
#define g_string_clear(gstr, free_segment) g_string_clear_inline (gstr, free_segment)

G_ALWAYS_INLINE
static inline GString*
g_string_append_c_inline (GString *gstring,
                          gchar    c)
{
  if (G_LIKELY (gstring->len + 1 < gstring->allocated_len))
    {
      gstring->str[gstring->len++] = c;
      gstring->str[gstring->len] = 0;
    }
  else
    g_string_insert_c (gstring, -1, c);
  return gstring;
}
#define g_string_append_c(gstr,c)       g_string_append_c_inline (gstr, c)

G_ALWAYS_INLINE
static inline GString *
g_string_append_len_inline (GString    *gstring,
                            const char *val,
                            gssize      len)
{
  if (len < 0)
    len = strlen (val);

  if (G_LIKELY (gstring->len + len < gstring->allocated_len))
    {
      char *end = gstring->str + gstring->len;
      if (G_LIKELY (val + len <= end || val > end + len))
        memcpy (end, val, len);
      else
        memmove (end, val, len);
      gstring->len += len;
      gstring->str[gstring->len] = 0;
      return gstring;
    }
  else
    return g_string_insert_len (gstring, -1, val, len);
}
#define g_string_append_len(gstr,val,len) g_string_append_len_inline (gstr, val, len)

G_ALWAYS_INLINE
static inline GString *
g_string_truncate_inline (GString *gstring,
                          gsize    len)
{
  gstring->len = MIN (len, gstring->len);
  gstring->str[gstring->len] = '\0';
  return gstring;
}
#define g_string_truncate(gstr,len) g_string_truncate_inline (gstr, len)

#if G_GNUC_CHECK_VERSION (2, 0)

#define g_string_append(gstr,val) g_string_append_len (gstr, val, __builtin_constant_p (val) ? (gssize) strlen (val) : (gssize) -1)

#endif

#endif /* G_CAN_INLINE */

#endif /* __GTK_DOC_IGNORE__ */

GLIB_DEPRECATED
GString *g_string_down (GString *string);
GLIB_DEPRECATED
GString *g_string_up   (GString *string);

#define  g_string_sprintf  g_string_printf GLIB_DEPRECATED_MACRO_IN_2_26_FOR(g_string_printf)
#define  g_string_sprintfa g_string_append_printf GLIB_DEPRECATED_MACRO_IN_2_26_FOR(g_string_append_printf)

G_END_DECLS

#endif /* __G_STRING_H__ */