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/*
* Copyright (C) 2008 Collabora, Ltd.
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1997-2000 The GLib Team
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "guriescape.h"
#include <string.h>
#if !PLATFORM(WIN_OS) && !GLIB_CHECK_VERSION(2,16,0)
/* is_valid, gunichar_ok and g_string_append_uri_escaped were copied for glib/gstring.c
* in the glib package.
*
* Original copyright:
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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/.
*
* Please don't change the indentation so it's easier to update these functions
* if they are changed in glib.
*/
static gboolean
is_valid (char c, const char *reserved_chars_allowed)
{
if (g_ascii_isalnum (c) ||
c == '-' ||
c == '.' ||
c == '_' ||
c == '~')
return TRUE;
if (reserved_chars_allowed &&
strchr (reserved_chars_allowed, c) != NULL)
return TRUE;
return FALSE;
}
static gboolean
gunichar_ok (gunichar c)
{
return
(c != (gunichar) -2) &&
(c != (gunichar) -1);
}
static GString *
_webcore_g_string_append_uri_escaped (GString *string,
const char *unescaped,
const char *reserved_chars_allowed,
gboolean allow_utf8)
{
unsigned char c;
const char *end;
static const gchar hex[16] = "0123456789ABCDEF";
g_return_val_if_fail (string != NULL, NULL);
g_return_val_if_fail (unescaped != NULL, NULL);
end = unescaped + strlen (unescaped);
while ((c = *unescaped) != 0)
{
if (c >= 0x80 && allow_utf8 &&
gunichar_ok (g_utf8_get_char_validated (unescaped, end - unescaped)))
{
int len = g_utf8_skip [c];
g_string_append_len (string, unescaped, len);
unescaped += len;
}
else if (is_valid (c, reserved_chars_allowed))
{
g_string_append_c (string, c);
unescaped++;
}
else
{
g_string_append_c (string, '%');
g_string_append_c (string, hex[((guchar)c) >> 4]);
g_string_append_c (string, hex[((guchar)c) & 0xf]);
unescaped++;
}
}
return string;
}
/* g_uri_escape_string, unescape_character, g_uri_unescape_segment and
* g_uri_unescape_string were copied for glib/gurifuncs.c in the glib package
* and prefixed with _webcore (if necessary) to avoid exporting a symbol with
* the "g_" prefix.
*
* Original copyright:
* Copyright (C) 2006-2007 Red Hat, Inc.
* Author: Alexander Larsson <alexl@redhat.com>
*
* Please don't change the indentation so it's easier to update this function
* if it's changed in glib.
*/
char *
_webcore_g_uri_escape_string (const char *unescaped,
const char *reserved_chars_allowed,
gboolean allow_utf8)
{
GString *s;
g_return_val_if_fail (unescaped != NULL, NULL);
s = g_string_sized_new (strlen (unescaped) + 10);
_webcore_g_string_append_uri_escaped (s, unescaped, reserved_chars_allowed, allow_utf8);
return g_string_free (s, FALSE);
}
static int
unescape_character (const char *scanner)
{
int first_digit;
int second_digit;
first_digit = g_ascii_xdigit_value (*scanner++);
if (first_digit < 0)
return -1;
second_digit = g_ascii_xdigit_value (*scanner++);
if (second_digit < 0)
return -1;
return (first_digit << 4) | second_digit;
}
static char *
_webcore_g_uri_unescape_segment (const char *escaped_string,
const char *escaped_string_end,
const char *illegal_characters)
{
const char *in;
char *out, *result;
gint character;
if (escaped_string == NULL)
return NULL;
if (escaped_string_end == NULL)
escaped_string_end = escaped_string + strlen (escaped_string);
result = g_malloc (escaped_string_end - escaped_string + 1);
out = result;
for (in = escaped_string; in < escaped_string_end; in++)
{
character = *in;
if (*in == '%')
{
in++;
if (escaped_string_end - in < 2)
{
/* Invalid escaped char (to short) */
g_free (result);
return NULL;
}
character = unescape_character (in);
/* Check for an illegal character. We consider '\0' illegal here. */
if (character <= 0 ||
(illegal_characters != NULL &&
strchr (illegal_characters, (char)character) != NULL))
{
g_free (result);
return NULL;
}
in++; /* The other char will be eaten in the loop header */
}
*out++ = (char)character;
}
*out = '\0';
return result;
}
char *
_webcore_g_uri_unescape_string (const char *escaped_string,
const char *illegal_characters)
{
return _webcore_g_uri_unescape_segment (escaped_string, NULL, illegal_characters);
}
#endif /* #if !PLATFORM(WIN_OS) && !GLIB_CHECK_VERSION(2,16,0) */
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