glib/glib/gstring.h

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

G_BEGIN_DECLS

typedef struct _GString         GString;

struct _GString
{
  gchar  *str;
  gsize len;
  gsize allocated_len;
};

GLIB_AVAILABLE_IN_ALL
GString*     g_string_new               (const gchar     *init);
GLIB_AVAILABLE_IN_2_78
GString*     g_string_new_take          (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_76
gchar*       g_string_free_and_steal    (GString         *string) G_GNUC_WARN_UNUSED_RESULT;

#if G_GNUC_CHECK_VERSION (2, 0) && (GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_76)

#define g_string_free(str, free_segment)        \
  (__builtin_constant_p (free_segment) ?        \
    ((free_segment) ?                           \
      (g_string_free) ((str), (free_segment)) : \
      g_string_free_and_steal (str))            \
    :                                           \
    (g_string_free) ((str), (free_segment)))

#endif /* G_GNUC_CHECK_VERSION (2, 0) && (GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_76) */

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);

#ifdef G_CAN_INLINE

#if defined (_MSC_VER) && !defined (__clang__)
#pragma warning (push)
#pragma warning (disable : 4141) /* silence "warning C4141: 'inline' used more than once" */
#endif

#ifndef __GTK_DOC_IGNORE__

G_ALWAYS_INLINE
static inline GString*
g_string_append_c_inline (GString *gstring,
                          gchar    c)
{
  if (G_LIKELY (gstring != NULL &&
                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)
{
  gsize len_unsigned;

  if G_UNLIKELY (gstring == NULL)
    return g_string_append_len (gstring, val, len);

  if G_UNLIKELY (val == NULL)
    return (len != 0) ? g_string_append_len (gstring, val, len) : gstring;

  if (len < 0)
    len_unsigned = strlen (val);
  else
    len_unsigned = (gsize) len;

  if (G_LIKELY (gstring->len + len_unsigned < gstring->allocated_len))
    {
      char *end = gstring->str + gstring->len;
      if (G_LIKELY (val + len_unsigned <= end || val > end + len_unsigned))
        memcpy (end, val, len_unsigned);
      else
        memmove (end, val, len_unsigned);
      gstring->len += len_unsigned;
      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)                  \
  (__builtin_constant_p (val) ?                     \
    G_GNUC_EXTENSION ({                             \
      const char * const __val = (val);             \
      g_string_append_len (gstr, __val,             \
        G_LIKELY (__val != NULL) ?                  \
          (gssize) strlen (_G_STR_NONNULL (__val))  \
        : (gssize) -1);                             \
    })                                              \
    :                                               \
    g_string_append_len (gstr, val, (gssize) -1))

#endif /* G_GNUC_CHECK_VERSION (2, 0) */

#endif /* __GTK_DOC_IGNORE__ */

#if defined (_MSC_VER) && !defined (__clang__)
#pragma warning (pop) /* #pragma warning (disable : 4141) */
#endif

#endif /* G_CAN_INLINE */

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__ */