1 /*

     2  * LIBOIL - Library of Optimized Inner Loops

     3  * Copyright (c) 2003,2004,2005 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 #ifndef _LIBOIL_RANDOM_H_

    29 #define _LIBOIL_RANDOM_H_

    30 

    31 #include <liboil/liboilutils.h>

    32 #include <liboil/liboiltypes.h>

    33 #include <stdlib.h>

    34 

    35 OIL_BEGIN_DECLS

    36 

    37 #ifdef OIL_ENABLE_UNSTABLE_API

    38 

    39 IMPORT_C void oil_random_s32(oil_type_s32 *dest, int n);

    40 IMPORT_C void oil_random_s64 (oil_type_s64 *dest, int n);

    41 IMPORT_C void oil_random_s16 (oil_type_s16 *dest, int n);

    42 IMPORT_C void oil_random_s8 (oil_type_s8 *dest, int n);

    43 IMPORT_C void oil_random_u32 (oil_type_u32 *dest, int n);

    44 IMPORT_C void oil_random_u64 (oil_type_u64 *dest, int n);

    45 IMPORT_C void oil_random_u16 (oil_type_u16 *dest, int n);

    46 IMPORT_C void oil_random_u8 (oil_type_u8 *dest, int n);

    47 IMPORT_C void oil_random_f64 (oil_type_f64 *dest, int n);

    48 IMPORT_C void oil_random_f32 (oil_type_f32 *dest, int n);

    49 IMPORT_C void oil_random_argb (oil_type_u32 *dest, int n);

    50 IMPORT_C void oil_random_alpha (oil_type_u8 *dest, int n);

    51 

    52 /**

    53  * oil_rand_s32:

    54  *

    55  * Evaluates to a random integer in the range [-(1<<31), (1<<31)-1].

    56  */

    57 #define oil_rand_s32() ((rand()&0xffff)<<16 | (rand()&0xffff))

    58 /**

    59  * oil_rand_s64:

    60  *

    61  * Evaluates to a random integer in the range [-(1<<63), (1<<63)-1].

    62  */

    63 #define oil_rand_s64() ((int64_t)(oil_rand_s32())<<32 | oil_rand_s32())

    64 

    65 /**

    66  * oil_rand_s16:

    67  *

    68  * Evaluates to a random integer in the range [-(1<<15), (1<<15)-1].

    69  */

    70 #define oil_rand_s16() ((int16_t)(rand()&0xffff))

    71 

    72 /**

    73  * oil_rand_s8:

    74  *

    75  * Evaluates to a random integer in the range [-(1<<7), (1<<7)-1].

    76  */

    77 #define oil_rand_s8() ((int8_t)(rand()&0xffff))

    78 

    79 /**

    80  * oil_rand_u32:

    81  *

    82  * Evaluates to a random integer in the range [0, (1<<32)-1].

    83  */

    84 #define oil_rand_u32() ((uint32_t)((rand()&0xffff)<<16 | (rand()&0xffff)))

    85 

    86 /**

    87  * oil_rand_u64:

    88  *

    89  * Evaluates to a random integer in the range [0, (1<<64)-1].

    90  */

    91 #define oil_rand_u64() ((uint64_t)(oil_rand_u32())<<32 | oil_rand_u32())

    92 

    93 /**

    94  * oil_rand_u16:

    95  *

    96  * Evaluates to a random integer in the range [0, (1<<16)-1].

    97  */

    98 #define oil_rand_u16() ((uint16_t)(rand()&0xffff))

    99 

   100 /**

   101  * oil_rand_u8:

   102  *

   103  * Evaluates to a random integer in the range [0, (1<<8)-1].

   104  */

   105 #define oil_rand_u8() ((uint8_t)(rand()&0xffff))

   106 

   107 

   108 /**

   109  * oil_rand_f64:

   110  *

   111  * Evaluates to a random double-precision floating point number

   112  * in the range [0, 1.0).

   113  */

   114 #define oil_rand_f64() (((rand()/(RAND_MAX+1.0))+rand())/(RAND_MAX+1.0))

   115 

   116 /**

   117  * oil_rand_f32:

   118  *

   119  * Evaluates to a random single-precision floating point number

   120  * in the range [0, 1.0).

   121  */

   122 #define oil_rand_f32() (rand()/(RAND_MAX+1.0))

   123 

   124 #endif

   125 

   126 OIL_END_DECLS

   127 

   128 #endif

   129