#include "config.h"
#include "guriescape.h"
#include <string.h>
#if !PLATFORM(WIN_OS) && !GLIB_CHECK_VERSION(2,16,0)
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;
}
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)
{
g_free (result);
return NULL;
}
character = unescape_character (in);
if (character <= 0 ||
(illegal_characters != NULL &&
strchr (illegal_characters, (char)character) != NULL))
{
g_free (result);
return NULL;
}
in++;
}
*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