diff -r ffe4ad26a64c -r bcbd7adb4e4b hedgewars/uRandom.pas --- a/hedgewars/uRandom.pas Mon Aug 22 21:38:06 2005 +0000 +++ b/hedgewars/uRandom.pas Tue Aug 23 16:17:53 2005 +0000 @@ -1,75 +1,75 @@ -(* - * Hedgewars, a worms-like game - * Copyright (c) 2004, 2005 Andrey Korotaev - * - * Distributed under the terms of the BSD-modified licence: - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * with the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO - * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; - * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR - * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF - * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - *) - -unit uRandom; -interface -uses uSHA; - -procedure SetRandomParams(Seed: shortstring; FillBuf: shortstring); -function GetRandom: real; overload; -function GetRandom(m: LongWord): LongWord; overload; - -implementation -var sc1, sc2: TSHA1Context; - Fill: shortstring; - -procedure SetRandomParams(Seed: shortstring; FillBuf: shortstring); -begin -SHA1Init(sc1); -SHA1Update(sc1, @Seed, Length(Seed)+1); -Fill:= FillBuf -end; - -function GetRandom: real; -var dig: TSHA1Digest; -begin -SHA1Update(sc1, @Fill[1], Length(Fill)); -sc2:= sc1; -dig:= SHA1Final(sc1); -Result:= frac( dig.LongWords[0]*0.0000731563977 - + pi * dig.Words[6] - + 0.0109070019*dig.Words[9]); -sc1:= sc2 -end; - -function GetRandom(m: LongWord): LongWord; -var dig: TSHA1Digest; -begin -SHA1Update(sc1, @Fill[1], Length(Fill)); -sc2:= sc1; -dig:= SHA1Final(sc1); -Result:= (((dig.LongWords[0] mod m) + (dig.LongWords[2] mod m)) mod m + (dig.LongWords[3] mod m)) mod m; -sc1:= sc2 -end; - -end. +(* + * Hedgewars, a worms-like game + * Copyright (c) 2004, 2005 Andrey Korotaev + * + * Distributed under the terms of the BSD-modified licence: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * with the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *) + +unit uRandom; +interface +uses uSHA; + +procedure SetRandomParams(Seed: shortstring; FillBuf: shortstring); +function GetRandom: real; overload; +function GetRandom(m: LongWord): LongWord; overload; + +implementation +var sc1, sc2: TSHA1Context; + Fill: shortstring; + +procedure SetRandomParams(Seed: shortstring; FillBuf: shortstring); +begin +SHA1Init(sc1); +SHA1Update(sc1, @Seed, Length(Seed)+1); +Fill:= FillBuf +end; + +function GetRandom: real; +var dig: TSHA1Digest; +begin +SHA1Update(sc1, @Fill[1], Length(Fill)); +sc2:= sc1; +dig:= SHA1Final(sc1); +Result:= frac( dig.LongWords[0]*0.0000731563977 + + pi * dig.Words[6] + + 0.0109070019*dig.Words[9]); +sc1:= sc2 +end; + +function GetRandom(m: LongWord): LongWord; +var dig: TSHA1Digest; +begin +SHA1Update(sc1, @Fill[1], Length(Fill)); +sc2:= sc1; +dig:= SHA1Final(sc1); +Result:= (((dig.LongWords[0] mod m) + (dig.LongWords[2] mod m)) mod m + (dig.LongWords[3] mod m)) mod m; +sc1:= sc2 +end; + +end.