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/* -*- 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;
}
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