2964 need POSIX 2008 locale object support
Reviewed by: Robert Mustacchi <rm@joyent.com>

@@ -666,5 +666,54 @@
 write(int fd, const void *buf, size_t size)
 {
         extern ssize_t __write(int, const void *, size_t);
         return (__write(fd, buf, size));
 }
+
+/*
+ * ASCII versions of ctype character classification functions.  This avoids
+ * pulling in the entire locale framework that is in libc.
+ */
+
+int
+isdigit(int c)
+{
+        return ((c >= '0' && c <= '9') ? 1 : 0);
+}
+
+int
+isupper(int c)
+{
+        return ((c >= 'A' && c <= 'Z') ? 1 : 0);
+}
+
+int
+islower(int c)
+{
+        return ((c >= 'a' && c <= 'z') ? 1 : 0);
+}
+
+int
+isspace(int c)
+{
+        return (((c == ' ') || (c == '\t') || (c == '\r') || (c == '\n') ||
+            (c == '\v') || (c == '\f')) ? 1 : 0);
+}
+
+int
+isxdigit(int c)
+{
+        return ((isdigit(c) || (c >= 'A' && c <= 'F') ||
+            (c >= 'a' && c <= 'f')) ? 1 : 0);
+}
+
+int
+isalpha(int c)
+{
+        return ((isupper(c) || islower(c)) ? 1 : 0);
+}
+
+int
+isalnum(int c)
+{
+        return ((isalpha(c) || isdigit(c)) ? 1 : 0);
+}