cannam@154: /* Copyright (c) 2011 Xiph.Org Foundation
cannam@154:    Written by Gregory Maxwell */
cannam@154: /*
cannam@154:    Redistribution and use in source and binary forms, with or without
cannam@154:    modification, are permitted provided that the following conditions
cannam@154:    are met:
cannam@154: 
cannam@154:    - Redistributions of source code must retain the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer.
cannam@154: 
cannam@154:    - Redistributions in binary form must reproduce the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer in the
cannam@154:    documentation and/or other materials provided with the distribution.
cannam@154: 
cannam@154:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
cannam@154:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
cannam@154:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
cannam@154:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
cannam@154:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
cannam@154:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
cannam@154:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
cannam@154:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
cannam@154:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
cannam@154:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
cannam@154:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cannam@154: */
cannam@154: 
cannam@154: static OPUS_INLINE void deb2_impl(unsigned char *_t,unsigned char **_p,int _k,int _x,int _y)
cannam@154: {
cannam@154:   int i;
cannam@154:   if(_x>2){
cannam@154:      if(_y<3)for(i=0;i<_y;i++)*(--*_p)=_t[i+1];
cannam@154:   }else{
cannam@154:      _t[_x]=_t[_x-_y];
cannam@154:      deb2_impl(_t,_p,_k,_x+1,_y);
cannam@154:      for(i=_t[_x-_y]+1;i<_k;i++){
cannam@154:        _t[_x]=i;
cannam@154:        deb2_impl(_t,_p,_k,_x+1,_x);
cannam@154:      }
cannam@154:   }
cannam@154: }
cannam@154: 
cannam@154: /*Generates a De Bruijn sequence (k,2) with length k^2*/
cannam@154: static OPUS_INLINE void debruijn2(int _k, unsigned char *_res)
cannam@154: {
cannam@154:    unsigned char *p;
cannam@154:    unsigned char *t;
cannam@154:    t=malloc(sizeof(unsigned char)*_k*2);
cannam@154:    memset(t,0,sizeof(unsigned char)*_k*2);
cannam@154:    p=&_res[_k*_k];
cannam@154:    deb2_impl(t,&p,_k,1,1);
cannam@154:    free(t);
cannam@154: }
cannam@154: 
cannam@154: /*MWC RNG of George Marsaglia*/
cannam@154: static opus_uint32 Rz, Rw;
cannam@154: static OPUS_INLINE opus_uint32 fast_rand(void)
cannam@154: {
cannam@154:   Rz=36969*(Rz&65535)+(Rz>>16);
cannam@154:   Rw=18000*(Rw&65535)+(Rw>>16);
cannam@154:   return (Rz<<16)+Rw;
cannam@154: }
cannam@154: static opus_uint32 iseed;
cannam@154: 
cannam@154: #ifdef __GNUC__
cannam@154: __attribute__((noreturn))
cannam@154: #elif defined(_MSC_VER)
cannam@154: __declspec(noreturn)
cannam@154: #endif
cannam@154: static OPUS_INLINE void _test_failed(const char *file, int line)
cannam@154: {
cannam@154:   fprintf(stderr,"\n ***************************************************\n");
cannam@154:   fprintf(stderr," ***         A fatal error was detected.         ***\n");
cannam@154:   fprintf(stderr," ***************************************************\n");
cannam@154:   fprintf(stderr,"Please report this failure and include\n");
cannam@154:   fprintf(stderr,"'make check SEED=%u fails %s at line %d for %s'\n",iseed,file,line,opus_get_version_string());
cannam@154:   fprintf(stderr,"and any relevant details about your system.\n\n");
cannam@154:   abort();
cannam@154: }
cannam@154: #define test_failed() _test_failed(__FILE__, __LINE__);
cannam@154: 
cannam@154: void regression_test(void);