forked from osmocom/wireshark
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/*
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* $Id$
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*
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* "g_ascii_strcasecmp()" and "g_ascii_strncasecmp()" extracted from
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* GLib 2.4.8, for use with GLibs that don't have it (e.g., GLib 1.2[.x]).
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*/
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#include <glib.h>
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#include "g_ascii_strcasecmp.h"
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#define ISUPPER(c) ((c) >= 'A' && (c) <= 'Z')
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#define ISLOWER(c) ((c) >= 'a' && (c) <= 'z')
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#define TOUPPER(c) (ISLOWER (c) ? (c) - 'a' + 'A' : (c))
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#define TOLOWER(c) (ISUPPER (c) ? (c) - 'A' + 'a' : (c))
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/**
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* g_ascii_strcasecmp:
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* @s1: string to compare with @s2.
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* @s2: string to compare with @s1.
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*
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* Compare two strings, ignoring the case of ASCII characters.
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*
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* Unlike the BSD strcasecmp() function, this only recognizes standard
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* ASCII letters and ignores the locale, treating all non-ASCII
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* characters as if they are not letters.
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*
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* Return value: an integer less than, equal to, or greater than
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* zero if @s1 is found, respectively, to be less than,
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* to match, or to be greater than @s2.
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**/
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gint
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g_ascii_strcasecmp (const gchar *s1,
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const gchar *s2)
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{
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gint c1, c2;
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g_return_val_if_fail (s1 != NULL, 0);
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g_return_val_if_fail (s2 != NULL, 0);
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while (*s1 && *s2)
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{
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c1 = (gint)(guchar) TOLOWER (*s1);
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c2 = (gint)(guchar) TOLOWER (*s2);
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if (c1 != c2)
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return (c1 - c2);
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s1++; s2++;
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}
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return (((gint)(guchar) *s1) - ((gint)(guchar) *s2));
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}
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/**
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* g_ascii_strncasecmp:
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* @s1: string to compare with @s2.
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* @s2: string to compare with @s1.
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* @n: number of characters to compare.
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*
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* Compare @s1 and @s2, ignoring the case of ASCII characters and any
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* characters after the first @n in each string.
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*
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* Unlike the BSD strcasecmp() function, this only recognizes standard
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* ASCII letters and ignores the locale, treating all non-ASCII
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* characters as if they are not letters.
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*
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* Return value: an integer less than, equal to, or greater than zero
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* if the first @n bytes of @s1 is found, respectively,
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* to be less than, to match, or to be greater than the
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* first @n bytes of @s2.
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**/
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gint
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g_ascii_strncasecmp (const gchar *s1,
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const gchar *s2,
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gsize n)
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{
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gint c1, c2;
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g_return_val_if_fail (s1 != NULL, 0);
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g_return_val_if_fail (s2 != NULL, 0);
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while (n && *s1 && *s2)
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{
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n -= 1;
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c1 = (gint)(guchar) TOLOWER (*s1);
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c2 = (gint)(guchar) TOLOWER (*s2);
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if (c1 != c2)
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return (c1 - c2);
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s1++; s2++;
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}
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if (n)
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return (((gint) (guchar) *s1) - ((gint) (guchar) *s2));
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else
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return 0;
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}
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