path: root/glib/gstrfuncs.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_STRFUNCS_H__
#define __G_STRFUNCS_H__

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

#include <stdarg.h>
#include <string.h>

#include <glib/gmacros.h>
#include <glib/gtypes.h>
#include <glib/gerror.h>
#include <glib/gmem.h>

G_BEGIN_DECLS

/* Functions like the ones in <ctype.h> that are not affected by locale. */
typedef enum {
  G_ASCII_ALNUM  = 1 << 0,
  G_ASCII_ALPHA  = 1 << 1,
  G_ASCII_CNTRL  = 1 << 2,
  G_ASCII_DIGIT  = 1 << 3,
  G_ASCII_GRAPH  = 1 << 4,
  G_ASCII_LOWER  = 1 << 5,
  G_ASCII_PRINT  = 1 << 6,
  G_ASCII_PUNCT  = 1 << 7,
  G_ASCII_SPACE  = 1 << 8,
  G_ASCII_UPPER  = 1 << 9,
  G_ASCII_XDIGIT = 1 << 10
} GAsciiType;

GLIB_VAR const guint16 * const g_ascii_table;

#define g_ascii_isalnum(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_ALNUM) != 0)

#define g_ascii_isalpha(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_ALPHA) != 0)

#define g_ascii_iscntrl(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_CNTRL) != 0)

#define g_ascii_isdigit(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_DIGIT) != 0)

#define g_ascii_isgraph(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_GRAPH) != 0)

#define g_ascii_islower(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_LOWER) != 0)

#define g_ascii_isprint(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0)

#define g_ascii_ispunct(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_PUNCT) != 0)

#define g_ascii_isspace(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)

#define g_ascii_isupper(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_UPPER) != 0)

#define g_ascii_isxdigit(c) \
  ((g_ascii_table[(guchar) (c)] & G_ASCII_XDIGIT) != 0)

GLIB_AVAILABLE_IN_ALL
gchar                 g_ascii_tolower  (gchar        c) G_GNUC_CONST;
GLIB_AVAILABLE_IN_ALL
gchar                 g_ascii_toupper  (gchar        c) G_GNUC_CONST;

GLIB_AVAILABLE_IN_ALL
gint                  g_ascii_digit_value  (gchar    c) G_GNUC_CONST;
GLIB_AVAILABLE_IN_ALL
gint                  g_ascii_xdigit_value (gchar    c) G_GNUC_CONST;

/* String utility functions that modify a string argument or
 * return a constant string that must not be freed.
 */
#define	 G_STR_DELIMITERS	"_-|> <."
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strdelimit     (gchar	     *string,
					const gchar  *delimiters,
					gchar	      new_delimiter);
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strcanon       (gchar        *string,
					const gchar  *valid_chars,
					gchar         substitutor);
GLIB_AVAILABLE_IN_ALL
const gchar *         g_strerror       (gint	      errnum) G_GNUC_CONST;
GLIB_AVAILABLE_IN_ALL
const gchar *         g_strsignal      (gint	      signum) G_GNUC_CONST;
GLIB_AVAILABLE_IN_ALL
gchar *	              g_strreverse     (gchar	     *string);
GLIB_AVAILABLE_IN_ALL
gsize	              g_strlcpy	       (gchar	     *dest,
					const gchar  *src,
					gsize         dest_size);
GLIB_AVAILABLE_IN_ALL
gsize	              g_strlcat        (gchar	     *dest,
					const gchar  *src,
					gsize         dest_size);
GLIB_AVAILABLE_IN_ALL
gchar *               g_strstr_len     (const gchar  *haystack,
					gssize        haystack_len,
					const gchar  *needle);
GLIB_AVAILABLE_IN_ALL
gchar *               g_strrstr        (const gchar  *haystack,
					const gchar  *needle);
GLIB_AVAILABLE_IN_ALL
gchar *               g_strrstr_len    (const gchar  *haystack,
					gssize        haystack_len,
					const gchar  *needle);

GLIB_AVAILABLE_IN_ALL
gboolean             (g_str_has_suffix) (const gchar *str,
                                         const gchar *suffix);
GLIB_AVAILABLE_IN_ALL
gboolean             (g_str_has_prefix) (const gchar *str,
                                         const gchar *prefix);

#if G_GNUC_CHECK_VERSION (2, 0)
#ifndef __GTK_DOC_IGNORE__
#ifndef __GI_SCANNER__

/* This macro is defeat a false -Wnonnull warning in GCC.
 * Without it, it thinks strlen and memcmp may be getting passed NULL
 * despite the explicit check for NULL right above the calls.
 */
#define _G_STR_NONNULL(x) ((x) + !(x))

#define g_str_has_prefix(STR, PREFIX)                                         \
  (__builtin_constant_p (PREFIX)?                                             \
    G_GNUC_EXTENSION ({                                                       \
       const char * const __str = (STR);                                      \
       const char * const __prefix = (PREFIX);                                \
       gboolean __result = FALSE;                                             \
                                                                              \
       if G_UNLIKELY (__str == NULL || __prefix == NULL)                      \
           __result = (g_str_has_prefix) (__str, __prefix);                   \
       else                                                                   \
         {                                                                    \
            const size_t __str_len = strlen (_G_STR_NONNULL (__str));         \
            const size_t __prefix_len = strlen (_G_STR_NONNULL (__prefix));   \
            if (__str_len >= __prefix_len)                                    \
              __result = memcmp (_G_STR_NONNULL (__str),                      \
                                 _G_STR_NONNULL (__prefix),                   \
                                 __prefix_len) == 0;                          \
         }                                                                    \
         __result;                                                            \
    })                                                                        \
  :                                                                           \
    (g_str_has_prefix) (STR, PREFIX)                                          \
  )

#define g_str_has_suffix(STR, SUFFIX)                                         \
  (__builtin_constant_p (SUFFIX)?                                             \
    G_GNUC_EXTENSION ({                                                       \
       const char * const __str = (STR);                                      \
       const char * const __suffix = (SUFFIX);                                \
       gboolean __result = FALSE;                                             \
                                                                              \
       if G_UNLIKELY (__str == NULL || __suffix == NULL)                      \
         __result = (g_str_has_suffix) (__str, __suffix);                     \
       else                                                                   \
         {                                                                    \
            const size_t __str_len = strlen (_G_STR_NONNULL (__str));         \
            const size_t __suffix_len = strlen (_G_STR_NONNULL (__suffix));   \
            if (__str_len >= __suffix_len)                                    \
              __result = memcmp (__str + __str_len - __suffix_len,            \
                                 _G_STR_NONNULL (__suffix),                   \
                                 __suffix_len) == 0;                          \
         }                                                                    \
         __result;                                                            \
    })                                                                        \
  :                                                                           \
    (g_str_has_suffix) (STR, SUFFIX)                                          \
  )

#endif /* !defined (__GI_SCANNER__) */
#endif /* !defined (__GTK_DOC_IGNORE__) */
#endif /* G_GNUC_CHECK_VERSION (2, 0) */

/* String to/from double conversion functions */

GLIB_AVAILABLE_IN_ALL
gdouble	              g_strtod         (const gchar  *nptr,
					gchar	    **endptr);
GLIB_AVAILABLE_IN_ALL
gdouble	              g_ascii_strtod   (const gchar  *nptr,
					gchar	    **endptr);
GLIB_AVAILABLE_IN_ALL
guint64		      g_ascii_strtoull (const gchar *nptr,
					gchar      **endptr,
					guint        base);
GLIB_AVAILABLE_IN_ALL
gint64		      g_ascii_strtoll  (const gchar *nptr,
					gchar      **endptr,
					guint        base);
/* 29 bytes should enough for all possible values that
 * g_ascii_dtostr can produce.
 * Then add 10 for good measure */
#define G_ASCII_DTOSTR_BUF_SIZE (29 + 10)
GLIB_AVAILABLE_IN_ALL
gchar *               g_ascii_dtostr   (gchar        *buffer,
					gint          buf_len,
					gdouble       d);
GLIB_AVAILABLE_IN_ALL
gchar *               g_ascii_formatd  (gchar        *buffer,
					gint          buf_len,
					const gchar  *format,
					gdouble       d);

/* removes leading spaces */
GLIB_AVAILABLE_IN_ALL
gchar*                g_strchug        (gchar        *string);
/* removes trailing spaces */
GLIB_AVAILABLE_IN_ALL
gchar*                g_strchomp       (gchar        *string);
/* removes leading & trailing spaces */
#define g_strstrip( string )	g_strchomp (g_strchug (string))

GLIB_AVAILABLE_IN_ALL
gint                  g_ascii_strcasecmp  (const gchar *s1,
					   const gchar *s2);
GLIB_AVAILABLE_IN_ALL
gint                  g_ascii_strncasecmp (const gchar *s1,
					   const gchar *s2,
					   gsize        n);
GLIB_AVAILABLE_IN_ALL
gchar*                g_ascii_strdown     (const gchar *str,
					   gssize       len) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
gchar*                g_ascii_strup       (const gchar *str,
					   gssize       len) G_GNUC_MALLOC;

GLIB_AVAILABLE_IN_2_40
gboolean              g_str_is_ascii      (const gchar *str);

GLIB_DEPRECATED
gint                  g_strcasecmp     (const gchar *s1,
                                        const gchar *s2);
GLIB_DEPRECATED
gint                  g_strncasecmp    (const gchar *s1,
                                        const gchar *s2,
                                        guint        n);
GLIB_DEPRECATED
gchar*                g_strdown        (gchar       *string);
GLIB_DEPRECATED
gchar*                g_strup          (gchar       *string);


/* String utility functions that return a newly allocated string which
 * ought to be freed with g_free from the caller at some point.
 */
GLIB_AVAILABLE_IN_ALL
gchar*	             (g_strdup)        (const gchar *str) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strdup_printf  (const gchar *format,
					...) G_GNUC_PRINTF (1, 2) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strdup_vprintf (const gchar *format,
					va_list      args) G_GNUC_PRINTF(1, 0) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strndup	       (const gchar *str,
					gsize        n) G_GNUC_MALLOC;  
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strnfill       (gsize        length,  
					gchar        fill_char) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
gchar*	              g_strconcat      (const gchar *string1,
					...) G_GNUC_MALLOC G_GNUC_NULL_TERMINATED;
GLIB_AVAILABLE_IN_ALL
gchar*                g_strjoin	       (const gchar  *separator,
					...) G_GNUC_MALLOC G_GNUC_NULL_TERMINATED;

#if G_GNUC_CHECK_VERSION(2, 0)
#ifndef __GTK_DOC_IGNORE__
#ifndef __GI_SCANNER__

G_ALWAYS_INLINE static inline char *
g_strdup_inline (const char *str)
{
  if (__builtin_constant_p (!str) && !str)
    return NULL;

  if (__builtin_constant_p (!!str) && !!str && __builtin_constant_p (strlen (str)))
    {
      const size_t len = strlen (str) + 1;
      char *dup_str = (char *) g_malloc (len);
      return (char *) memcpy (dup_str, str, len);
    }

  return g_strdup (str);
}

#define g_strdup(x) g_strdup_inline (x)

#endif /* !defined (__GI_SCANNER__) */
#endif /* !defined (__GTK_DOC_IGNORE__) */
#endif /* G_GNUC_CHECK_VERSION (2, 0) */

/* Make a copy of a string interpreting C string -style escape
 * sequences. Inverse of g_strescape. The recognized sequences are \b
 * \f \n \r \t \\ \" and the octal format.
 */
GLIB_AVAILABLE_IN_ALL
gchar*                g_strcompress    (const gchar *source) G_GNUC_MALLOC;

/* Copy a string escaping nonprintable characters like in C strings.
 * Inverse of g_strcompress. The exceptions parameter, if non-NULL, points
 * to a string containing characters that are not to be escaped.
 *
 * Deprecated API: gchar* g_strescape (const gchar *source);
 * Luckily this function wasn't used much, using NULL as second parameter
 * provides mostly identical semantics.
 */
GLIB_AVAILABLE_IN_ALL
gchar*                g_strescape      (const gchar *source,
					const gchar *exceptions) G_GNUC_MALLOC;

GLIB_DEPRECATED_IN_2_68_FOR (g_memdup2)
gpointer              g_memdup         (gconstpointer mem,
                                        guint         byte_size) G_GNUC_ALLOC_SIZE(2);

GLIB_AVAILABLE_IN_2_68
gpointer              g_memdup2        (gconstpointer mem,
                                        gsize         byte_size) G_GNUC_ALLOC_SIZE(2);

/* NULL terminated string arrays.
 * g_strsplit(), g_strsplit_set() split up string into max_tokens tokens
 * at delim and return a newly allocated string array.
 * g_strjoinv() concatenates all of str_array's strings, sliding in an
 * optional separator, the returned string is newly allocated.
 * g_strfreev() frees the array itself and all of its strings.
 * g_strdupv() copies a NULL-terminated array of strings
 * g_strv_length() returns the length of a NULL-terminated array of strings
 */
typedef gchar** GStrv;
GLIB_AVAILABLE_IN_ALL
gchar**	              g_strsplit       (const gchar  *string,
					const gchar  *delimiter,
					gint          max_tokens);
GLIB_AVAILABLE_IN_ALL
gchar **	      g_strsplit_set   (const gchar *string,
					const gchar *delimiters,
					gint         max_tokens);
GLIB_AVAILABLE_IN_ALL
gchar*                g_strjoinv       (const gchar  *separator,
					gchar       **str_array) G_GNUC_MALLOC;
GLIB_AVAILABLE_IN_ALL
void                  g_strfreev       (gchar       **str_array);
GLIB_AVAILABLE_IN_ALL
gchar**               g_strdupv        (gchar       **str_array);
GLIB_AVAILABLE_IN_ALL
guint                 g_strv_length    (gchar       **str_array);

GLIB_AVAILABLE_IN_ALL
gchar*                g_stpcpy         (gchar        *dest,
                                        const char   *src);

GLIB_AVAILABLE_IN_2_40
gchar *                 g_str_to_ascii                                  (const gchar   *str,
                                                                         const gchar   *from_locale);

GLIB_AVAILABLE_IN_2_40
gchar **                g_str_tokenize_and_fold                         (const gchar   *string,
                                                                         const gchar   *translit_locale,
                                                                         gchar       ***ascii_alternates);

GLIB_AVAILABLE_IN_2_40
gboolean                g_str_match_string                              (const gchar   *search_term,
                                                                         const gchar   *potential_hit,
                                                                         gboolean       accept_alternates);

GLIB_AVAILABLE_IN_2_44
gboolean              g_strv_contains  (const gchar * const *strv,
                                        const gchar         *str);

GLIB_AVAILABLE_IN_2_60
gboolean              g_strv_equal     (const gchar * const *strv1,
                                        const gchar * const *strv2);

/* Convenience ASCII string to number API */

/**
 * GNumberParserError:
 * @G_NUMBER_PARSER_ERROR_INVALID: String was not a valid number.
 * @G_NUMBER_PARSER_ERROR_OUT_OF_BOUNDS: String was a number, but out of bounds.
 *
 * Error codes returned by functions converting a string to a number.
 *
 * Since: 2.54
 */
typedef enum
  {
    G_NUMBER_PARSER_ERROR_INVALID,
    G_NUMBER_PARSER_ERROR_OUT_OF_BOUNDS,
  } GNumberParserError;

/**
 * G_NUMBER_PARSER_ERROR:
 *
 * Domain for errors returned by functions converting a string to a
 * number.
 *
 * Since: 2.54
 */
#define G_NUMBER_PARSER_ERROR (g_number_parser_error_quark ())

GLIB_AVAILABLE_IN_2_54
GQuark                g_number_parser_error_quark  (void);

GLIB_AVAILABLE_IN_2_54
gboolean              g_ascii_string_to_signed     (const gchar  *str,
                                                    guint         base,
                                                    gint64        min,
                                                    gint64        max,
                                                    gint64       *out_num,
                                                    GError      **error);

GLIB_AVAILABLE_IN_2_54
gboolean              g_ascii_string_to_unsigned   (const gchar  *str,
                                                    guint         base,
                                                    guint64       min,
                                                    guint64       max,
                                                    guint64      *out_num,
                                                    GError      **error);

/**
 * g_set_str: (skip)
 * @str_pointer: (inout) (not optional) (nullable): a pointer to either a string or %NULL
 * @new_str: (nullable): a string to assign to @str_pointer, or %NULL
 *
 * Updates a pointer to a string to a copy of @new_str. The previous string
 * pointed to by @str_pointer will be freed with g_free().
 *
 * @str_pointer must not be %NULL, but can point to a %NULL value.
 *
 * One convenient usage of this function is in implementing property settings:
 * |[
 *   void
 *   foo_set_bar (Foo        *foo,
 *                const char *new_bar)
 *   {
 *     g_return_if_fail (IS_FOO (foo));
 *
 *     if (g_set_str (&foo->bar, new_bar))
 *       g_object_notify (foo, "bar");
 *   }
 * ]|
 *
 * Returns: %TRUE if the value of @str_pointer changed, %FALSE otherwise
 *
 * Since: 2.76
 */
GLIB_AVAILABLE_STATIC_INLINE_IN_2_76
static inline gboolean
g_set_str (char       **str_pointer,
           const char  *new_str)
{
  char *copy;

  if (*str_pointer == new_str ||
      (*str_pointer && new_str && strcmp (*str_pointer, new_str) == 0))
    return FALSE;

  copy = g_strdup (new_str);
  g_free (*str_pointer);
  *str_pointer = copy;

  return TRUE;
}

G_END_DECLS

#endif /* __G_STRFUNCS_H__ */