1 files changed, 112 insertions, 0 deletions
diff --git a/src/raptor_nfc_icu.c b/src/raptor_nfc_icu.c
new file mode 100644
index 0000000..03d2459
--- /dev/null
+++ b/src/raptor_nfc_icu.c
@@ -0,0 +1,112 @@
+/* -*- Mode: c; c-basic-offset: 2 -*-
+ *
+ * raptor_nfc_icu.c - Raptor Unicode NFC checking via ICU library
+ *
+ * Copyright (C) 2012, David Beckett http://www.dajobe.org/
+ * 
+ * This package is Free Software and part of Redland http://librdf.org/
+ * 
+ * It is licensed under the following three licenses as alternatives:
+ *   1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
+ *   2. GNU General Public License (GPL) V2 or any newer version
+ *   3. Apache License, V2.0 or any newer version
+ * 
+ * You may not use this file except in compliance with at least one of
+ * the above three licenses.
+ * 
+ * See LICENSE.html or LICENSE.txt at the top of this package for the
+ * complete terms and further detail along with the license texts for
+ * the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
+ * 
+ * 
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <raptor_config.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+/* Raptor includes */
+#include "raptor2.h"
+#include "raptor_internal.h"
+
+#include <unicode/ustring.h>
+#if ICU_UC_MAJOR_VERSION >= 56
+#include <unicode/unorm2.h>
+#else
+#include <unicode/unorm.h>
+#endif
+
+
+/*
+ * raptor_nfc_icu_check:
+ * @input: UTF-8 string
+ * @length: length of string
+ * @error: pointer to error flag (or NULL)
+ *
+ * INTERNAL - Unicode Normal Form C (NFC) check function via ICU
+ *
+ * If errorp is not NULL, it is set to non-0 on error
+ * 
+ * Return value: <0 on error, 0 if is not NFC, >0 if is NFC
+ **/
+int
+raptor_nfc_icu_check(const unsigned char* string, size_t len)
+{
+#if ICU_UC_MAJOR_VERSION >= 56
+  /* norm2 is be a singleton - do not attempt to free it */
+  const UNormalizer2 *norm2;
+#endif
+  UErrorCode error_code = U_ZERO_ERROR;
+  UNormalizationCheckResult res;
+  UChar *dest; /* UTF-16 */
+  int32_t dest_capacity = len << 1;
+  int32_t dest_length;
+  int rc = 0;
+
+  /* ICU functions take a UTF-16 string so convert */
+  dest = RAPTOR_MALLOC(UChar*, dest_capacity + 1);
+  if(!dest)
+    goto error;
+
+  (void)u_strFromUTF8(dest, dest_capacity, &dest_length,
+                      (const char *)string, (int32_t)len, &error_code);
+  if(!U_SUCCESS(error_code))
+    goto error;
+
+  /* unorm_quickCheck was deprecated in ICU UC V56 */
+#if ICU_UC_MAJOR_VERSION >= 56
+  norm2 = unorm2_getNFCInstance(&error_code);
+  if(!U_SUCCESS(error_code))
+    goto error;
+
+  res = unorm2_quickCheck(norm2, dest, dest_length, &error_code);
+#else
+  res = unorm_quickCheck(dest, dest_length, UNORM_NFC, &error_code);
+#endif
+  if(!U_SUCCESS(error_code))
+    goto error;
+
+  /* success */
+  rc = (res == UNORM_YES);
+  goto cleanup;
+
+error:
+  rc = -1;
+
+cleanup:
+  if(dest)
+    RAPTOR_FREE(UChar*, dest);
+
+  return rc;
+}