diff options
Diffstat (limited to 'panels/datetime/date-endian.c')
| -rw-r--r-- | panels/datetime/date-endian.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/panels/datetime/date-endian.c b/panels/datetime/date-endian.c new file mode 100644 index 0000000..435a423 --- /dev/null +++ b/panels/datetime/date-endian.c @@ -0,0 +1,188 @@ +/* + * 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/>. + * + * Author: Bastien Nocera <hadess@hadess.net> + * + */ + +#include <errno.h> +#include <langinfo.h> +#include <locale.h> +#include <glib.h> +#include <string.h> + +#include "date-endian.h" + +/* We default to returning DATE_ENDIANESS_LITTLE because that's + * what 3.4 billion people use */ +#define DEFAULT_ENDIANESS DATE_ENDIANESS_LITTLE + +typedef enum { + ITEM_NONE = 0, + ITEM_DAY, + ITEM_MONTH, + ITEM_YEAR +} Item; + +static gboolean +has_item (Item *items, + Item item) +{ + guint i; + + for (i = 0; i < 3; i++) { + if (items[i] == ITEM_NONE) + return FALSE; + if (items[i] == item) + return TRUE; + } + return FALSE; +} + +DateEndianess +date_endian_get_default (gboolean verbose) +{ + const char *fmt; + const char *p; + Item items[3]; + guint i; + + fmt = nl_langinfo (D_FMT); + g_return_val_if_fail (fmt != NULL, DEFAULT_ENDIANESS); + + if (verbose) + g_print ("%s", fmt); + + if (g_str_equal (fmt, "%F")) + return DATE_ENDIANESS_BIG; + + i = 0; + memset (&items, 0, sizeof(items)); + + /* Assume ASCII only */ + for (p = fmt; *p != '\0'; p++) { + char c; + + /* Look for '%' */ + if (*p != '%') + continue; + + /* Only assert when we're sure we don't have another '%' */ + if (i >= 4) { + g_warning ("Could not parse format '%s', too many formats", fmt); + return DEFAULT_ENDIANESS; + } + + c = *(p + 1); + /* Ignore alternative formats */ + if (c == 'O' || c == '-' || c == 'E') + c = *(p + 2); + if (c == '\0') { + g_warning ("Count not parse format '%s', unterminated '%%'", fmt); + return DEFAULT_ENDIANESS; + } + switch (c) { + case 'A': + case 'd': + case 'e': + if (has_item (items, ITEM_DAY) == FALSE) { + items[i] = ITEM_DAY; + i++; + } + break; + case 'm': + case 'b': + case 'B': + if (has_item (items, ITEM_MONTH) == FALSE) { + items[i] = ITEM_MONTH; + i++; + } + break; + case 'y': + case 'Y': + if (has_item (items, ITEM_YEAR) == FALSE) { + items[i] = ITEM_YEAR; + i++; + } + break; + case 'a': + /* Ignore */ + ; + } + } + + if (items[0] == ITEM_DAY && + items[1] == ITEM_MONTH && + items[2] == ITEM_YEAR) + return DATE_ENDIANESS_LITTLE; + if (items[0] == ITEM_YEAR && + items[1] == ITEM_MONTH && + items[2] == ITEM_DAY) + return DATE_ENDIANESS_BIG; + if (items[0] == ITEM_MONTH && + items[1] == ITEM_DAY && + items[2] == ITEM_YEAR) + return DATE_ENDIANESS_MIDDLE; + if (items[0] == ITEM_YEAR && + items[1] == ITEM_DAY && + items[2] == ITEM_MONTH) + return DATE_ENDIANESS_YDM; + + g_warning ("Could not parse format '%s'", fmt); + + return DEFAULT_ENDIANESS; +} + +DateEndianess +date_endian_get_for_lang (const char *lang, + gboolean verbose) +{ + locale_t locale; + locale_t old_locale; + DateEndianess endian; + + locale = newlocale (LC_TIME_MASK, lang, (locale_t) 0); + if (locale == (locale_t) 0) + g_warning ("Failed to create locale %s: %s", lang, g_strerror (errno)); + else + old_locale = uselocale (locale); + + endian = date_endian_get_default (verbose); + + if (locale != (locale_t) 0) { + uselocale (old_locale); + freelocale (locale); + } + + return endian; +} + +const char * +date_endian_to_string (DateEndianess endianess) +{ + switch (endianess) { + case DATE_ENDIANESS_LITTLE: + return "Little (DD-MM-YYYY)"; + case DATE_ENDIANESS_BIG: + return "Big (YYYY-MM-DD)"; + case DATE_ENDIANESS_MIDDLE: + return "Middle (MM-DD-YYYY)"; + case DATE_ENDIANESS_YDM: + return "YDM (YYYY-DD-MM)"; + default: + g_assert_not_reached (); + } +} |