1 files changed, 83 insertions, 0 deletions
diff --git a/lib/libc/locale/fix_grouping.c b/lib/libc/locale/fix_grouping.c
new file mode 100644
index 0000000..db49e18
--- /dev/null
+++ b/lib/libc/locale/fix_grouping.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <limits.h>
+#include <stddef.h>
+
+static const char nogrouping[] = { CHAR_MAX, '\0' };
+
+/*
+ * "3;3;-1" -> "\003\003\177"
+ */
+
+const char *
+__fix_locale_grouping_str(const char *str) {
+
+	char *src, *dst;
+	char n;
+
+	if (str == NULL || *str == '\0') {
+		return nogrouping;
+	}
+
+	for (src = (char*)str, dst = (char*)str; *src != '\0'; src++) {
+
+		/* input string examples: "3;3", "3;2;-1" */
+		if (*src == ';')
+			continue;
+	
+		if (*src == '-' && *(src+1) == '1') {
+			*dst++ = CHAR_MAX;
+			src++;
+			continue;
+		}
+
+		if (!isdigit((unsigned char)*src)) {
+			/* broken grouping string */
+			return nogrouping;
+		}
+
+		/* assume all numbers <= 99 */
+		n = *src - '0';
+		if (isdigit((unsigned char)*(src+1))) {
+			src++;
+			n *= 10;
+			n += *src - '0';
+		}
+
+		*dst = n;
+		/* NOTE: assume all input started with "0" as 'no grouping' */
+		if (*dst == '\0')
+			return (dst == (char*)str) ? nogrouping : str;
+		dst++;
+	}
+	*dst = '\0';
+	return str;
+}