1 /*

     2  * LIBOIL - Library of Optimized Inner Loops

     3  * Copyright (c) 2004 David A. Schleef <ds@schleef.org>

     4  * All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions

     8  * are met:

     9  * 1. Redistributions of source code must retain the above copyright

    10  *    notice, this list of conditions and the following disclaimer.

    11  * 2. Redistributions in binary form must reproduce the above copyright

    12  *    notice, this list of conditions and the following disclaimer in the

    13  *    documentation and/or other materials provided with the distribution.

    14  * 

    15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

    16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,

    19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

    24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    27 

    28 #ifdef HAVE_CONFIG_H

    29 #include "config.h"

    30 #endif

    31 

    32 #include <liboil/liboil.h>

    33 #include <liboil/liboiltest.h>

    34 #include <liboil/liboilrandom.h>

    35 #include "liboil/utf8/utf8.h"

    36 

    37 

    38 /*

    39  * Little explanation:

    40  *  0x00-0x7f  ASCII, one byte character

    41  *  0x80-0xbf  continuation byte, not a valid start byte

    42  *  0xc0-0xdf  2-byte character

    43  *  0xe0-0xef  3-byte character

    44  *  0xf0-0xf7  4-byte character

    45  *  0xf8-0xff  reserved (illegal at the present time)

    46  */

    47 static void

    48 utf8_validate_test (OilTest *test)

    49 {

    50   int i;

    51   int n = test->n;

    52   uint8_t *ptr = oil_test_get_source_data (test, OIL_ARG_SRC1);

    53   int x;

    54   int extra_chars = 0;

    55 

    56   for (i=0;i<n;i++){

    57     if (i >= n-16) {

    58       /* if it's close to the end, we'll randomly drop in a bad

    59        * byte from either the 0x80-0xbf or 0xf8-0xff segments */

    60       x = oil_rand_u8();

    61       if (x < 16) {

    62         x = oil_rand_u8();

    63         if (extra_chars>0) {

    64           /* this might not actually be a bad char */

    65           ptr[i] = x;

    66           extra_chars--;

    67         } else {

    68           if (x & 0x80) {

    69             ptr[i] = 0x80 | (x&0x3f);

    70           } else {

    71             ptr[i] = 0xf8 | (x&0x07);

    72           }

    73         }

    74         continue;

    75       }

    76     }

    77     if (extra_chars > 0) {

    78       ptr[i] = 0x80 | (oil_rand_u8() & 0x3f);

    79       extra_chars--;

    80     } else {

    81       /* otherwise, we'll do a low probability of a multibyte char */

    82       x = oil_rand_u8() & 0xf;

    83       if (x == 0) {

    84         ptr[i] = 0xc0 | (oil_rand_u8() & 0x1f);

    85         extra_chars = 1;

    86       } else if (x == 1) {

    87         ptr[i] = 0xe0 | (oil_rand_u8() & 0x0f);

    88         extra_chars = 2;

    89       } else if (x == 2) {

    90         ptr[i] = 0xf0 | (oil_rand_u8() & 0x07);

    91         extra_chars = 3;

    92       } else {

    93         ptr[i] = oil_rand_u8() & 0x7f;

    94       }

    95     }

    96   }

    97 

    98 }

    99 

   100 /**

   101  * oil_utf8_validate:

   102  * @d_1:

   103  * @s:

   104  * @n:

   105  *

   106  * Checks @s for valid UTF-8 characters.  If the entire @s array

   107  * represents valid UTF-8 characters, @n is written to @d_1.

   108  * Otherwise, the index in the array of the beginning of the first

   109  * invalid UTF-8 character is written to @d_1.

   110  */

   111 OIL_DEFINE_CLASS_FULL (utf8_validate, "int32_t *d_1, uint8_t *s, int n",

   112     utf8_validate_test);

   113 

   114 

   115 static void

   116 utf8_validate_ref (int32_t *d_1, uint8_t *s, int n)

   117 {

   118   int i;

   119   int extra_bytes;

   120   int mask;

   121 

   122   for(i=0;i<n;i++){

   123     extra_bytes = 0;

   124     if (s[i] < 128) continue;

   125     if ((s[i] & 0xe0) == 0xc0) {

   126       extra_bytes = 1;

   127       mask = 0x7f;

   128     } else if ((s[i] & 0xf0) == 0xe0) {

   129       extra_bytes = 2;

   130       mask = 0x1f;

   131     } else if ((s[i] & 0xf8) == 0xf0) {

   132       extra_bytes = 3;

   133       mask = 0x0f;

   134     } else {

   135       goto error;

   136     }

   137     if (i + extra_bytes >= n) goto error;

   138     while(extra_bytes--) {

   139       i++;

   140       if ((s[i] & 0xc0) != 0x80) goto error;

   141     }

   142   }

   143 

   144 error:

   145   d_1[0] = i;

   146 }

   147 

   148 OIL_DEFINE_IMPL_REF (utf8_validate_ref, utf8_validate);

   149 

   150 

   151