Index: uspace/lib/posix/source/locale.c
===================================================================
--- uspace/lib/posix/source/locale.c	(revision 33c29521d96b892e096419a2fd8beb867e2596f6)
+++ uspace/lib/posix/source/locale.c	(revision 33c29521d96b892e096419a2fd8beb867e2596f6)
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2011 Jiri Zarevucky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libposix
+ * @{
+ */
+/** @file Locale-specific definitions.
+ */
+
+#define LIBPOSIX_INTERNAL
+
+#include "internal/common.h"
+#include "posix/locale.h"
+
+#include "posix/errno.h"
+#include "posix/limits.h"
+#include "posix/string.h"
+
+/* Just a very basic dummy implementation.
+ * This should allow code using locales to work properly, but doesn't provide
+ * any localization functionality.
+ * Should be extended/rewritten when or if HelenOS supports locales natively.
+ */
+
+struct __posix_locale {
+	int _dummy;
+};
+
+const struct posix_lconv C_LOCALE = {
+	.currency_symbol = (char *) "",
+	.decimal_point = (char *) ".",
+	.frac_digits = CHAR_MAX,
+	.grouping = (char *) "",
+	.int_curr_symbol = (char *) "",
+	.int_frac_digits = CHAR_MAX,
+	.int_n_cs_precedes = CHAR_MAX,
+	.int_n_sep_by_space = CHAR_MAX,
+	.int_n_sign_posn = CHAR_MAX,
+	.int_p_cs_precedes = CHAR_MAX,
+	.int_p_sep_by_space = CHAR_MAX,
+	.int_p_sign_posn = CHAR_MAX,
+	.mon_decimal_point = (char *) "",
+	.mon_grouping = (char *) "",
+	.mon_thousands_sep = (char *) "",
+	.negative_sign = (char *) "",
+	.n_cs_precedes = CHAR_MAX,
+	.n_sep_by_space = CHAR_MAX,
+	.n_sign_posn = CHAR_MAX,
+	.positive_sign = (char *) "",
+	.p_cs_precedes = CHAR_MAX,
+	.p_sep_by_space = CHAR_MAX,
+	.p_sign_posn = CHAR_MAX,
+	.thousands_sep = (char *) ""
+};
+
+/**
+ * Set program locale.
+ * 
+ * @param category What category to set.
+ * @param locale Locale name.
+ * @return Original locale name on success, NULL on failure.
+ */
+char *posix_setlocale(int category, const char *locale)
+{
+	// TODO
+	if (locale == NULL || *locale == '\0' ||
+	    posix_strcmp(locale, "C") == 0) {
+		return (char *) "C";
+	}
+	return NULL;
+}
+
+/**
+ * Return locale-specific information.
+ * 
+ * @return Information about the current locale.
+ */
+struct posix_lconv *posix_localeconv(void)
+{
+	// TODO
+	return (struct posix_lconv *) &C_LOCALE;
+}
+
+/**
+ * Duplicate locale object.
+ * 
+ * @param locobj Object to duplicate.
+ * @return Duplicated object.
+ */
+posix_locale_t posix_duplocale(posix_locale_t locobj)
+{
+	if (locobj == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	posix_locale_t copy = malloc(sizeof(struct __posix_locale));
+	if (copy == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	memcpy(copy, locobj, sizeof(struct __posix_locale));
+	return copy;
+}
+
+/**
+ * Free locale object.
+ * 
+ * @param locobj Object to free.
+ */
+void posix_freelocale(posix_locale_t locobj)
+{
+	if (locobj) {
+		free(locobj);
+	}
+}
+
+/**
+ * Create or modify a locale object.
+ * 
+ * @param category_mask Mask of categories to be set or modified.
+ * @param locale Locale to be used.
+ * @param base Object to modify. 0 if new object is to be created.
+ * @return The new/modified locale object.
+ */
+posix_locale_t posix_newlocale(int category_mask, const char *locale,
+    posix_locale_t base)
+{
+	if (locale == NULL ||
+	    (category_mask & LC_ALL_MASK) != category_mask) {
+		errno = EINVAL;
+		return NULL;
+	}
+	// TODO
+	posix_locale_t new = malloc(sizeof(struct __posix_locale));
+	if (new == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	if (base != NULL) {
+		posix_freelocale(base);
+	}
+	return new;
+}
+
+/**
+ * Set locale for the current thread.
+ * 
+ * @param newloc Locale to use.
+ * @return The previously set locale or LC_GLOBAL_LOCALE
+ */
+posix_locale_t posix_uselocale(posix_locale_t newloc)
+{
+	// TODO
+	return LC_GLOBAL_LOCALE;
+}
+
+/** @}
+ */