diff options
Diffstat (limited to 'panels/common/hostname-helper.c')
| -rw-r--r-- | panels/common/hostname-helper.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/panels/common/hostname-helper.c b/panels/common/hostname-helper.c new file mode 100644 index 0000000..a8f7c41 --- /dev/null +++ b/panels/common/hostname-helper.c @@ -0,0 +1,204 @@ +/* + * 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, see <http://www.gnu.org/licenses/>. + * + */ + +#include <glib.h> +#include <glib/gi18n.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++) + ; + + 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) + memmove (apo, apo + 1, strlen (apo)); + return input; +} + +static char * +remove_duplicate_dashes (char *input) +{ + char *dashes; + + while ((dashes = strstr (input, "--")) != NULL) + memmove (dashes, dashes + 1, strlen (dashes)); + return input; +} + +#define CHECK if (is_empty (result)) return g_strdup ("localhost") + +char * +pretty_hostname_to_static (const char *pretty, + gboolean for_display) +{ + g_autofree gchar *result = NULL; + g_autofree gchar *valid_chars = NULL; + g_autofree gchar *composed = NULL; + + 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); + + composed = g_utf8_normalize (pretty, -1, G_NORMALIZE_ALL_COMPOSE); + g_debug ("\tcomposed: '%s'", composed); + /* Transform the pretty hostname to ASCII */ + result = g_str_to_ascii (composed, NULL); + g_debug ("\ttranslit: '%s'", result); + + CHECK; + + /* Remove apostrophes */ + remove_apostrophes (result); + g_debug ("\tapostrophes: '%s'", result); + + CHECK; + + /* Remove all the not-allowed chars */ + valid_chars = allowed_chars (); + g_strcanon (result, valid_chars, '-'); + g_debug ("\tcanon: '%s'", result); + + CHECK; + + /* Remove the leading dashes */ + remove_leading_dashes (result); + g_debug ("\tleading: '%s'", result); + + CHECK; + + /* Remove trailing dashes */ + remove_trailing_dashes (result); + g_debug ("\ttrailing: '%s'", result); + + CHECK; + + /* Remove duplicate dashes */ + remove_duplicate_dashes (result); + g_debug ("\tduplicate: '%s'", result); + + CHECK; + + /* Lower case */ + if (!for_display) + return g_ascii_strdown (result, -1); + + return g_steal_pointer (&result); +} +#undef CHECK + +/* Max length of an SSID in bytes */ +#define SSID_MAX_LEN 32 +char * +pretty_hostname_to_ssid (const char *pretty) +{ + const char *p, *prev; + + if (pretty == NULL || *pretty == '\0') { + pretty = g_get_host_name (); + if (g_strcmp0 (pretty, "localhost") == 0) + pretty = NULL; + } + + if (pretty == NULL) { + /* translators: This is the default hotspot name, need to be less than 32-bytes */ + gchar *ret = g_strdup (C_("hotspot", "Hotspot")); + g_assert (strlen (ret) <= SSID_MAX_LEN); + return ret; + } + + g_return_val_if_fail (g_utf8_validate (pretty, -1, NULL), NULL); + + p = pretty; + prev = NULL; + while ((p = g_utf8_find_next_char (p, NULL)) != NULL) { + if (p == prev) + break; + + if (p - pretty > SSID_MAX_LEN) { + return g_strndup (pretty, prev - pretty); + } + if (p - pretty == SSID_MAX_LEN) { + return g_strndup (pretty, p - pretty); + } + + if (*p == '\0') + break; + + prev = p; + } + + return g_strdup (pretty); +} |