sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: 
sl@0: #include <liboil/liboil.h>
sl@0: #include <liboil/liboiltest.h>
sl@0: #include <liboil/liboilrandom.h>
sl@0: #include "liboil/utf8/utf8.h"
sl@0: 
sl@0: 
sl@0: /*
sl@0:  * Little explanation:
sl@0:  *  0x00-0x7f  ASCII, one byte character
sl@0:  *  0x80-0xbf  continuation byte, not a valid start byte
sl@0:  *  0xc0-0xdf  2-byte character
sl@0:  *  0xe0-0xef  3-byte character
sl@0:  *  0xf0-0xf7  4-byte character
sl@0:  *  0xf8-0xff  reserved (illegal at the present time)
sl@0:  */
sl@0: static void
sl@0: utf8_validate_test (OilTest *test)
sl@0: {
sl@0:   int i;
sl@0:   int n = test->n;
sl@0:   uint8_t *ptr = oil_test_get_source_data (test, OIL_ARG_SRC1);
sl@0:   int x;
sl@0:   int extra_chars = 0;
sl@0: 
sl@0:   for (i=0;i<n;i++){
sl@0:     if (i >= n-16) {
sl@0:       /* if it's close to the end, we'll randomly drop in a bad
sl@0:        * byte from either the 0x80-0xbf or 0xf8-0xff segments */
sl@0:       x = oil_rand_u8();
sl@0:       if (x < 16) {
sl@0:         x = oil_rand_u8();
sl@0:         if (extra_chars>0) {
sl@0:           /* this might not actually be a bad char */
sl@0:           ptr[i] = x;
sl@0:           extra_chars--;
sl@0:         } else {
sl@0:           if (x & 0x80) {
sl@0:             ptr[i] = 0x80 | (x&0x3f);
sl@0:           } else {
sl@0:             ptr[i] = 0xf8 | (x&0x07);
sl@0:           }
sl@0:         }
sl@0:         continue;
sl@0:       }
sl@0:     }
sl@0:     if (extra_chars > 0) {
sl@0:       ptr[i] = 0x80 | (oil_rand_u8() & 0x3f);
sl@0:       extra_chars--;
sl@0:     } else {
sl@0:       /* otherwise, we'll do a low probability of a multibyte char */
sl@0:       x = oil_rand_u8() & 0xf;
sl@0:       if (x == 0) {
sl@0:         ptr[i] = 0xc0 | (oil_rand_u8() & 0x1f);
sl@0:         extra_chars = 1;
sl@0:       } else if (x == 1) {
sl@0:         ptr[i] = 0xe0 | (oil_rand_u8() & 0x0f);
sl@0:         extra_chars = 2;
sl@0:       } else if (x == 2) {
sl@0:         ptr[i] = 0xf0 | (oil_rand_u8() & 0x07);
sl@0:         extra_chars = 3;
sl@0:       } else {
sl@0:         ptr[i] = oil_rand_u8() & 0x7f;
sl@0:       }
sl@0:     }
sl@0:   }
sl@0: 
sl@0: }
sl@0: 
sl@0: /**
sl@0:  * oil_utf8_validate:
sl@0:  * @d_1:
sl@0:  * @s:
sl@0:  * @n:
sl@0:  *
sl@0:  * Checks @s for valid UTF-8 characters.  If the entire @s array
sl@0:  * represents valid UTF-8 characters, @n is written to @d_1.
sl@0:  * Otherwise, the index in the array of the beginning of the first
sl@0:  * invalid UTF-8 character is written to @d_1.
sl@0:  */
sl@0: OIL_DEFINE_CLASS_FULL (utf8_validate, "int32_t *d_1, uint8_t *s, int n",
sl@0:     utf8_validate_test);
sl@0: 
sl@0: 
sl@0: static void
sl@0: utf8_validate_ref (int32_t *d_1, uint8_t *s, int n)
sl@0: {
sl@0:   int i;
sl@0:   int extra_bytes;
sl@0:   int mask;
sl@0: 
sl@0:   for(i=0;i<n;i++){
sl@0:     extra_bytes = 0;
sl@0:     if (s[i] < 128) continue;
sl@0:     if ((s[i] & 0xe0) == 0xc0) {
sl@0:       extra_bytes = 1;
sl@0:       mask = 0x7f;
sl@0:     } else if ((s[i] & 0xf0) == 0xe0) {
sl@0:       extra_bytes = 2;
sl@0:       mask = 0x1f;
sl@0:     } else if ((s[i] & 0xf8) == 0xf0) {
sl@0:       extra_bytes = 3;
sl@0:       mask = 0x0f;
sl@0:     } else {
sl@0:       goto error;
sl@0:     }
sl@0:     if (i + extra_bytes >= n) goto error;
sl@0:     while(extra_bytes--) {
sl@0:       i++;
sl@0:       if ((s[i] & 0xc0) != 0x80) goto error;
sl@0:     }
sl@0:   }
sl@0: 
sl@0: error:
sl@0:   d_1[0] = i;
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL_REF (utf8_validate_ref, utf8_validate);
sl@0: 
sl@0: 
sl@0: