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/*
* Copyright (C) 2011 Red Hat, Inc
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <glib.h>
#include <string.h>
#include "hostname-helper.h"
static char *
allowed_chars (void)
{
GString *s;
char i;
s = g_string_new (NULL);
for (i = 'a'; i <= 'z'; i++)
g_string_append_c (s, i);
for (i = 'A'; i <= 'Z'; i++)
g_string_append_c (s, i);
for (i = '0'; i <= '9'; i++)
g_string_append_c (s, i);
g_string_append_c (s, '-');
return g_string_free (s, FALSE);
}
static char *
remove_leading_dashes (char *input)
{
char *start;
for (start = input; *start && (*start == '-'); start++)
;
g_memmove (input, start, strlen (start) + 1);
return input;
}
static gboolean
is_empty (const char *input)
{
if (input == NULL ||
*input == '\0')
return TRUE;
return FALSE;
}
static char *
remove_trailing_dashes (char *input)
{
int len;
len = strlen (input);
while (len--) {
if (input[len] == '-')
input[len] = '\0';
else
break;
}
return input;
}
static char *
remove_apostrophes (char *input)
{
char *apo;
while ((apo = strchr (input, '\'')) != NULL)
g_memmove (apo, apo + 1, strlen (apo));
return input;
}
static char *
remove_duplicate_dashes (char *input)
{
char *dashes;
while ((dashes = strstr (input, "--")) != NULL)
g_memmove (dashes, dashes + 1, strlen (dashes));
return input;
}
#define CHECK if (is_empty (result)) goto bail
char *
pretty_hostname_to_static (const char *pretty,
gboolean for_display)
{
char *result;
char *valid_chars;
g_return_val_if_fail (pretty != NULL, NULL);
g_return_val_if_fail (g_utf8_validate (pretty, -1, NULL), NULL);
g_debug ("Input: '%s'", pretty);
/* Transform the pretty hostname to ASCII */
result = g_convert (pretty,
-1,
"ASCII//TRANSLIT//IGNORE",
"UTF-8",
NULL,
NULL,
NULL);
g_debug ("\ttranslit: '%s'", result);
CHECK;
/* Remove apostrophes */
result = remove_apostrophes (result);
g_debug ("\tapostrophes: '%s'", result);
CHECK;
/* Remove all the not-allowed chars */
valid_chars = allowed_chars ();
result = g_strcanon (result, valid_chars, '-');
g_free (valid_chars);
g_debug ("\tcanon: '%s'", result);
CHECK;
/* Remove the leading dashes */
result = remove_leading_dashes (result);
g_debug ("\tleading: '%s'", result);
CHECK;
/* Remove trailing dashes */
result = remove_trailing_dashes (result);
g_debug ("\ttrailing: '%s'", result);
CHECK;
/* Remove duplicate dashes */
result = remove_duplicate_dashes (result);
g_debug ("\tduplicate: '%s'", result);
CHECK;
/* Lower case */
if (!for_display) {
char *tmp;
tmp = g_ascii_strdown (result, -1);
g_free (result);
result = tmp;
}
return result;
bail:
g_free (result);
return g_strdup ("localhost");
}
#undef CHECK
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