libwind from Assar. stringprep library supporting nameprep, saslprep and ldapprep

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@22551 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/wind/errorlist.c

@@ -0,0 +1,44 @@
+#include "windlocl.h"
+
+#include <stdlib.h>
+
+#include "errorlist_table.h"
+
+static int
+error_entry_cmp(const void *a, const void *b)
+{
+    const struct error_entry *ea = (const struct error_entry*)a;
+    const struct error_entry *eb = (const struct error_entry*)b;
+
+    if (ea->start >= eb->start && ea->start < eb->start + eb->len)
+	return 0;
+    return ea->start - eb->start;
+}
+
+int
+_wind_stringprep_error(uint32_t cp, wind_profile_flags flags)
+{
+    struct error_entry ee = {cp};
+    const struct error_entry *s;
+
+    s = (const struct error_entry *)
+	bsearch(&ee, _wind_errorlist_table,
+		_wind_errorlist_table_size,
+		sizeof(_wind_errorlist_table[0]),
+		error_entry_cmp);
+    if (s == NULL)
+	return 0;
+    return (s->flags & flags);
+}
+
+int
+_wind_stringprep_prohibited(const uint32_t *in, size_t in_len,
+			    wind_profile_flags flags)
+{
+    unsigned i;
+
+    for (i = 0; i < in_len; ++i)
+	if (_wind_stringprep_error(in[i], flags))
+	    return 1;
+    return 0;
+}