From 6a777afc079c2a8d3af3ecd2145fe8dd50567a39 Mon Sep 17 00:00:00 2001 From: Paweł Redman Date: Wed, 22 Mar 2017 17:56:34 +0100 Subject: Funko sources as released by Rotacak. --- src/game/bg_lib.c | 2037 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2037 insertions(+) create mode 100644 src/game/bg_lib.c (limited to 'src/game/bg_lib.c') diff --git a/src/game/bg_lib.c b/src/game/bg_lib.c new file mode 100644 index 0000000..5750044 --- /dev/null +++ b/src/game/bg_lib.c @@ -0,0 +1,2037 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. +Copyright (C) 2000-2006 Tim Angus + +This file is part of Tremulous. + +Tremulous is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 2 of the License, +or (at your option) any later version. + +Tremulous is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Tremulous; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +=========================================================================== +*/ + +// bg_lib.c -- standard C library replacement routines used by code +// compiled for the virtual machine + + +#include "../qcommon/q_shared.h" + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. + */ + +#include "bg_lib.h" + +#if defined(LIBC_SCCS) && !defined(lint) +#if 0 +static char sccsid[] = "@(#)qsort.c 8.1 (Berkeley) 6/4/93"; +#endif +static const char rcsid[] = + "$Id: bg_lib.c 965 2007-08-09 13:54:12Z msk $"; +#endif /* LIBC_SCCS and not lint */ + +// bk001127 - needed for DLL's +#if !defined( Q3_VM ) +typedef int cmp_t(const void *, const void *); +#endif + +static char* med3(char *, char *, char *, cmp_t *); +static void swapfunc(char *, char *, int, int); + +#ifndef min +#define min(a, b) (a) < (b) ? a : b +#endif + +/* + * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". + */ +#define swapcode(TYPE, parmi, parmj, n) { \ + long i = (n) / sizeof (TYPE); \ + register TYPE *pi = (TYPE *) (parmi); \ + register TYPE *pj = (TYPE *) (parmj); \ + do { \ + register TYPE t = *pi; \ + *pi++ = *pj; \ + *pj++ = t; \ + } while (--i > 0); \ +} + +#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ + es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; + +static void +swapfunc(a, b, n, swaptype) + char *a, *b; + int n, swaptype; +{ + if(swaptype <= 1) + swapcode(long, a, b, n) + else + swapcode(char, a, b, n) +} + +#define swap(a, b) \ + if (swaptype == 0) { \ + long t = *(long *)(a); \ + *(long *)(a) = *(long *)(b); \ + *(long *)(b) = t; \ + } else \ + swapfunc(a, b, es, swaptype) + +#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) + +static char * +med3(a, b, c, cmp) + char *a, *b, *c; + cmp_t *cmp; +{ + return cmp(a, b) < 0 ? + (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a )) + :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c )); +} + +void +qsort(a, n, es, cmp) + void *a; + size_t n, es; + cmp_t *cmp; +{ + char *pa, *pb, *pc, *pd, *pl, *pm, *pn; + int d, r, swaptype, swap_cnt; + +loop: SWAPINIT(a, es); + swap_cnt = 0; + if (n < 7) { + for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es) + for (pl = pm; pl > (char *)a && cmp(pl - es, pl) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + pm = (char *)a + (n / 2) * es; + if (n > 7) { + pl = a; + pn = (char *)a + (n - 1) * es; + if (n > 40) { + d = (n / 8) * es; + pl = med3(pl, pl + d, pl + 2 * d, cmp); + pm = med3(pm - d, pm, pm + d, cmp); + pn = med3(pn - 2 * d, pn - d, pn, cmp); + } + pm = med3(pl, pm, pn, cmp); + } + swap(a, pm); + pa = pb = (char *)a + es; + + pc = pd = (char *)a + (n - 1) * es; + for (;;) { + while (pb <= pc && (r = cmp(pb, a)) <= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pa, pb); + pa += es; + } + pb += es; + } + while (pb <= pc && (r = cmp(pc, a)) >= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pc, pd); + pd -= es; + } + pc -= es; + } + if (pb > pc) + break; + swap(pb, pc); + swap_cnt = 1; + pb += es; + pc -= es; + } + if (swap_cnt == 0) { /* Switch to insertion sort */ + for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es) + for (pl = pm; pl > (char *)a && cmp(pl - es, pl) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + + pn = (char *)a + n * es; + r = min(pa - (char *)a, pb - pa); + vecswap(a, pb - r, r); + r = min(pd - pc, pn - pd - es); + vecswap(pb, pn - r, r); + if ((r = pb - pa) > es) + qsort(a, r / es, es, cmp); + if ((r = pd - pc) > es) { + /* Iterate rather than recurse to save stack space */ + a = pn - r; + n = r / es; + goto loop; + } +/* qsort(pn - r, r / es, es, cmp);*/ +} + +//================================================================================== + + +// this file is excluded from release builds because of intrinsics + +// bk001211 - gcc errors on compiling strcpy: parse error before `__extension__' +#if defined ( Q3_VM ) + +size_t strlen( const char *string ) +{ + const char *s; + + s = string; + while( *s ) + s++; + + return s - string; +} + + +char *strcat( char *strDestination, const char *strSource ) +{ + char *s; + + s = strDestination; + while( *s ) + s++; + + while( *strSource ) + *s++ = *strSource++; + + *s = 0; + return strDestination; +} + +char *strcpy( char *strDestination, const char *strSource ) +{ + char *s; + + s = strDestination; + + while( *strSource ) + *s++ = *strSource++; + + *s = 0; + return strDestination; +} + + +int strcmp( const char *string1, const char *string2 ) +{ + while( *string1 == *string2 && *string1 && *string2 ) + { + string1++; + string2++; + } + + return *string1 - *string2; +} + +//TA: +char *strrchr( const char *string, int c ) +{ + int i, length = strlen( string ); + char *p; + + for( i = length - 1; i >= 0; i-- ) + { + p = (char *)&string[ i ]; + + if( *p == c ) + return (char *)p; + } + + return (char *)0; +} + +char *strchr( const char *string, int c ) +{ + while( *string ) + { + if( *string == c ) + return ( char * )string; + + string++; + } + return (char *)0; +} + +char *strstr( const char *string, const char *strCharSet ) +{ + while( *string ) + { + int i; + + for( i = 0; strCharSet[ i ]; i++ ) + { + if( string[ i ] != strCharSet[ i ] ) + break; + } + + if( !strCharSet[ i ] ) + return (char *)string; + + string++; + } + return (char *)0; +} + +#endif // bk001211 + +#if defined ( Q3_VM ) + +int tolower( int c ) +{ + if( c >= 'A' && c <= 'Z' ) + c += 'a' - 'A'; + + return c; +} + + +int toupper( int c ) +{ + if( c >= 'a' && c <= 'z' ) + c += 'A' - 'a'; + + return c; +} + +#endif + +void *memmove( void *dest, const void *src, size_t count ) +{ + int i; + + if( dest > src ) + { + for( i = count - 1; i >= 0; i-- ) + ( (char *)dest )[ i ] = ( (char *)src )[ i ]; + } + else + { + for( i = 0; i < count; i++ ) + ( (char *)dest )[ i ] = ( (char *)src )[ i ]; + } + + return dest; +} + + +#if 0 + +double floor( double x ) { + return (int)(x + 0x40000000) - 0x40000000; +} + +void *memset( void *dest, int c, size_t count ) { + while ( count-- ) { + ((char *)dest)[count] = c; + } + return dest; +} + +void *memcpy( void *dest, const void *src, size_t count ) { + while ( count-- ) { + ((char *)dest)[count] = ((char *)src)[count]; + } + return dest; +} + +char *strncpy( char *strDest, const char *strSource, size_t count ) { + char *s; + + s = strDest; + while ( *strSource && count ) { + *s++ = *strSource++; + count--; + } + while ( count-- ) { + *s++ = 0; + } + return strDest; +} + +double sqrt( double x ) { + float y; + float delta; + float maxError; + + if ( x <= 0 ) { + return 0; + } + + // initial guess + y = x / 2; + + // refine + maxError = x * 0.001; + + do { + delta = ( y * y ) - x; + y -= delta / ( 2 * y ); + } while ( delta > maxError || delta < -maxError ); + + return y; +} + + +float sintable[1024] = { +0.000000,0.001534,0.003068,0.004602,0.006136,0.007670,0.009204,0.010738, +0.012272,0.013805,0.015339,0.016873,0.018407,0.019940,0.021474,0.023008, +0.024541,0.026075,0.027608,0.029142,0.030675,0.032208,0.033741,0.035274, +0.036807,0.038340,0.039873,0.041406,0.042938,0.044471,0.046003,0.047535, +0.049068,0.050600,0.052132,0.053664,0.055195,0.056727,0.058258,0.059790, +0.061321,0.062852,0.064383,0.065913,0.067444,0.068974,0.070505,0.072035, +0.073565,0.075094,0.076624,0.078153,0.079682,0.081211,0.082740,0.084269, +0.085797,0.087326,0.088854,0.090381,0.091909,0.093436,0.094963,0.096490, +0.098017,0.099544,0.101070,0.102596,0.104122,0.105647,0.107172,0.108697, +0.110222,0.111747,0.113271,0.114795,0.116319,0.117842,0.119365,0.120888, +0.122411,0.123933,0.125455,0.126977,0.128498,0.130019,0.131540,0.133061, +0.134581,0.136101,0.137620,0.139139,0.140658,0.142177,0.143695,0.145213, +0.146730,0.148248,0.149765,0.151281,0.152797,0.154313,0.155828,0.157343, +0.158858,0.160372,0.161886,0.163400,0.164913,0.166426,0.167938,0.169450, +0.170962,0.172473,0.173984,0.175494,0.177004,0.178514,0.180023,0.181532, +0.183040,0.184548,0.186055,0.187562,0.189069,0.190575,0.192080,0.193586, +0.195090,0.196595,0.198098,0.199602,0.201105,0.202607,0.204109,0.205610, +0.207111,0.208612,0.210112,0.211611,0.213110,0.214609,0.216107,0.217604, +0.219101,0.220598,0.222094,0.223589,0.225084,0.226578,0.228072,0.229565, +0.231058,0.232550,0.234042,0.235533,0.237024,0.238514,0.240003,0.241492, +0.242980,0.244468,0.245955,0.247442,0.248928,0.250413,0.251898,0.253382, +0.254866,0.256349,0.257831,0.259313,0.260794,0.262275,0.263755,0.265234, +0.266713,0.268191,0.269668,0.271145,0.272621,0.274097,0.275572,0.277046, +0.278520,0.279993,0.281465,0.282937,0.284408,0.285878,0.287347,0.288816, +0.290285,0.291752,0.293219,0.294685,0.296151,0.297616,0.299080,0.300543, +0.302006,0.303468,0.304929,0.306390,0.307850,0.309309,0.310767,0.312225, +0.313682,0.315138,0.316593,0.318048,0.319502,0.320955,0.322408,0.323859, +0.325310,0.326760,0.328210,0.329658,0.331106,0.332553,0.334000,0.335445, +0.336890,0.338334,0.339777,0.341219,0.342661,0.344101,0.345541,0.346980, +0.348419,0.349856,0.351293,0.352729,0.354164,0.355598,0.357031,0.358463, +0.359895,0.361326,0.362756,0.364185,0.365613,0.367040,0.368467,0.369892, +0.371317,0.372741,0.374164,0.375586,0.377007,0.378428,0.379847,0.381266, +0.382683,0.384100,0.385516,0.386931,0.388345,0.389758,0.391170,0.392582, +0.393992,0.395401,0.396810,0.398218,0.399624,0.401030,0.402435,0.403838, +0.405241,0.406643,0.408044,0.409444,0.410843,0.412241,0.413638,0.415034, +0.416430,0.417824,0.419217,0.420609,0.422000,0.423390,0.424780,0.426168, +0.427555,0.428941,0.430326,0.431711,0.433094,0.434476,0.435857,0.437237, +0.438616,0.439994,0.441371,0.442747,0.444122,0.445496,0.446869,0.448241, +0.449611,0.450981,0.452350,0.453717,0.455084,0.456449,0.457813,0.459177, +0.460539,0.461900,0.463260,0.464619,0.465976,0.467333,0.468689,0.470043, +0.471397,0.472749,0.474100,0.475450,0.476799,0.478147,0.479494,0.480839, +0.482184,0.483527,0.484869,0.486210,0.487550,0.488889,0.490226,0.491563, +0.492898,0.494232,0.495565,0.496897,0.498228,0.499557,0.500885,0.502212, +0.503538,0.504863,0.506187,0.507509,0.508830,0.510150,0.511469,0.512786, +0.514103,0.515418,0.516732,0.518045,0.519356,0.520666,0.521975,0.523283, +0.524590,0.525895,0.527199,0.528502,0.529804,0.531104,0.532403,0.533701, +0.534998,0.536293,0.537587,0.538880,0.540171,0.541462,0.542751,0.544039, +0.545325,0.546610,0.547894,0.549177,0.550458,0.551738,0.553017,0.554294, +0.555570,0.556845,0.558119,0.559391,0.560662,0.561931,0.563199,0.564466, +0.565732,0.566996,0.568259,0.569521,0.570781,0.572040,0.573297,0.574553, +0.575808,0.577062,0.578314,0.579565,0.580814,0.582062,0.583309,0.584554, +0.585798,0.587040,0.588282,0.589521,0.590760,0.591997,0.593232,0.594466, +0.595699,0.596931,0.598161,0.599389,0.600616,0.601842,0.603067,0.604290, +0.605511,0.606731,0.607950,0.609167,0.610383,0.611597,0.612810,0.614022, +0.615232,0.616440,0.617647,0.618853,0.620057,0.621260,0.622461,0.623661, +0.624859,0.626056,0.627252,0.628446,0.629638,0.630829,0.632019,0.633207, +0.634393,0.635578,0.636762,0.637944,0.639124,0.640303,0.641481,0.642657, +0.643832,0.645005,0.646176,0.647346,0.648514,0.649681,0.650847,0.652011, +0.653173,0.654334,0.655493,0.656651,0.657807,0.658961,0.660114,0.661266, +0.662416,0.663564,0.664711,0.665856,0.667000,0.668142,0.669283,0.670422, +0.671559,0.672695,0.673829,0.674962,0.676093,0.677222,0.678350,0.679476, +0.680601,0.681724,0.682846,0.683965,0.685084,0.686200,0.687315,0.688429, +0.689541,0.690651,0.691759,0.692866,0.693971,0.695075,0.696177,0.697278, +0.698376,0.699473,0.700569,0.701663,0.702755,0.703845,0.704934,0.706021, +0.707107,0.708191,0.709273,0.710353,0.711432,0.712509,0.713585,0.714659, +0.715731,0.716801,0.717870,0.718937,0.720003,0.721066,0.722128,0.723188, +0.724247,0.725304,0.726359,0.727413,0.728464,0.729514,0.730563,0.731609, +0.732654,0.733697,0.734739,0.735779,0.736817,0.737853,0.738887,0.739920, +0.740951,0.741980,0.743008,0.744034,0.745058,0.746080,0.747101,0.748119, +0.749136,0.750152,0.751165,0.752177,0.753187,0.754195,0.755201,0.756206, +0.757209,0.758210,0.759209,0.760207,0.761202,0.762196,0.763188,0.764179, +0.765167,0.766154,0.767139,0.768122,0.769103,0.770083,0.771061,0.772036, +0.773010,0.773983,0.774953,0.775922,0.776888,0.777853,0.778817,0.779778, +0.780737,0.781695,0.782651,0.783605,0.784557,0.785507,0.786455,0.787402, +0.788346,0.789289,0.790230,0.791169,0.792107,0.793042,0.793975,0.794907, +0.795837,0.796765,0.797691,0.798615,0.799537,0.800458,0.801376,0.802293, +0.803208,0.804120,0.805031,0.805940,0.806848,0.807753,0.808656,0.809558, +0.810457,0.811355,0.812251,0.813144,0.814036,0.814926,0.815814,0.816701, +0.817585,0.818467,0.819348,0.820226,0.821103,0.821977,0.822850,0.823721, +0.824589,0.825456,0.826321,0.827184,0.828045,0.828904,0.829761,0.830616, +0.831470,0.832321,0.833170,0.834018,0.834863,0.835706,0.836548,0.837387, +0.838225,0.839060,0.839894,0.840725,0.841555,0.842383,0.843208,0.844032, +0.844854,0.845673,0.846491,0.847307,0.848120,0.848932,0.849742,0.850549, +0.851355,0.852159,0.852961,0.853760,0.854558,0.855354,0.856147,0.856939, +0.857729,0.858516,0.859302,0.860085,0.860867,0.861646,0.862424,0.863199, +0.863973,0.864744,0.865514,0.866281,0.867046,0.867809,0.868571,0.869330, +0.870087,0.870842,0.871595,0.872346,0.873095,0.873842,0.874587,0.875329, +0.876070,0.876809,0.877545,0.878280,0.879012,0.879743,0.880471,0.881197, +0.881921,0.882643,0.883363,0.884081,0.884797,0.885511,0.886223,0.886932, +0.887640,0.888345,0.889048,0.889750,0.890449,0.891146,0.891841,0.892534, +0.893224,0.893913,0.894599,0.895284,0.895966,0.896646,0.897325,0.898001, +0.898674,0.899346,0.900016,0.900683,0.901349,0.902012,0.902673,0.903332, +0.903989,0.904644,0.905297,0.905947,0.906596,0.907242,0.907886,0.908528, +0.909168,0.909806,0.910441,0.911075,0.911706,0.912335,0.912962,0.913587, +0.914210,0.914830,0.915449,0.916065,0.916679,0.917291,0.917901,0.918508, +0.919114,0.919717,0.920318,0.920917,0.921514,0.922109,0.922701,0.923291, +0.923880,0.924465,0.925049,0.925631,0.926210,0.926787,0.927363,0.927935, +0.928506,0.929075,0.929641,0.930205,0.930767,0.931327,0.931884,0.932440, +0.932993,0.933544,0.934093,0.934639,0.935184,0.935726,0.936266,0.936803, +0.937339,0.937872,0.938404,0.938932,0.939459,0.939984,0.940506,0.941026, +0.941544,0.942060,0.942573,0.943084,0.943593,0.944100,0.944605,0.945107, +0.945607,0.946105,0.946601,0.947094,0.947586,0.948075,0.948561,0.949046, +0.949528,0.950008,0.950486,0.950962,0.951435,0.951906,0.952375,0.952842, +0.953306,0.953768,0.954228,0.954686,0.955141,0.955594,0.956045,0.956494, +0.956940,0.957385,0.957826,0.958266,0.958703,0.959139,0.959572,0.960002, +0.960431,0.960857,0.961280,0.961702,0.962121,0.962538,0.962953,0.963366, +0.963776,0.964184,0.964590,0.964993,0.965394,0.965793,0.966190,0.966584, +0.966976,0.967366,0.967754,0.968139,0.968522,0.968903,0.969281,0.969657, +0.970031,0.970403,0.970772,0.971139,0.971504,0.971866,0.972226,0.972584, +0.972940,0.973293,0.973644,0.973993,0.974339,0.974684,0.975025,0.975365, +0.975702,0.976037,0.976370,0.976700,0.977028,0.977354,0.977677,0.977999, +0.978317,0.978634,0.978948,0.979260,0.979570,0.979877,0.980182,0.980485, +0.980785,0.981083,0.981379,0.981673,0.981964,0.982253,0.982539,0.982824, +0.983105,0.983385,0.983662,0.983937,0.984210,0.984480,0.984749,0.985014, +0.985278,0.985539,0.985798,0.986054,0.986308,0.986560,0.986809,0.987057, +0.987301,0.987544,0.987784,0.988022,0.988258,0.988491,0.988722,0.988950, +0.989177,0.989400,0.989622,0.989841,0.990058,0.990273,0.990485,0.990695, +0.990903,0.991108,0.991311,0.991511,0.991710,0.991906,0.992099,0.992291, +0.992480,0.992666,0.992850,0.993032,0.993212,0.993389,0.993564,0.993737, +0.993907,0.994075,0.994240,0.994404,0.994565,0.994723,0.994879,0.995033, +0.995185,0.995334,0.995481,0.995625,0.995767,0.995907,0.996045,0.996180, +0.996313,0.996443,0.996571,0.996697,0.996820,0.996941,0.997060,0.997176, +0.997290,0.997402,0.997511,0.997618,0.997723,0.997825,0.997925,0.998023, +0.998118,0.998211,0.998302,0.998390,0.998476,0.998559,0.998640,0.998719, +0.998795,0.998870,0.998941,0.999011,0.999078,0.999142,0.999205,0.999265, +0.999322,0.999378,0.999431,0.999481,0.999529,0.999575,0.999619,0.999660, +0.999699,0.999735,0.999769,0.999801,0.999831,0.999858,0.999882,0.999905, +0.999925,0.999942,0.999958,0.999971,0.999981,0.999989,0.999995,0.999999 +}; + +double sin( double x ) { + int index; + int quad; + + index = 1024 * x / (M_PI * 0.5); + quad = ( index >> 10 ) & 3; + index &= 1023; + switch ( quad ) { + case 0: + return sintable[index]; + case 1: + return sintable[1023-index]; + case 2: + return -sintable[index]; + case 3: + return -sintable[1023-index]; + } + return 0; +} + + +double cos( double x ) { + int index; + int quad; + + index = 1024 * x / (M_PI * 0.5); + quad = ( index >> 10 ) & 3; + index &= 1023; + switch ( quad ) { + case 3: + return sintable[index]; + case 0: + return sintable[1023-index]; + case 1: + return -sintable[index]; + case 2: + return -sintable[1023-index]; + } + return 0; +} + + +/* +void create_acostable( void ) { + int i; + FILE *fp; + float a; + + fp = fopen("c:\\acostable.txt", "w"); + fprintf(fp, "float acostable[] = {"); + for (i = 0; i < 1024; i++) { + if (!(i & 7)) + fprintf(fp, "\n"); + a = acos( (float) -1 + i / 512 ); + fprintf(fp, "%1.8f,", a); + } + fprintf(fp, "\n}\n"); + fclose(fp); +} +*/ + + +float acostable[] = { +3.14159265,3.07908248,3.05317551,3.03328655,3.01651113,3.00172442,2.98834964,2.97604422, +2.96458497,2.95381690,2.94362719,2.93393068,2.92466119,2.91576615,2.90720289,2.89893629, +2.89093699,2.88318015,2.87564455,2.86831188,2.86116621,2.85419358,2.84738169,2.84071962, +2.83419760,2.82780691,2.82153967,2.81538876,2.80934770,2.80341062,2.79757211,2.79182724, +2.78617145,2.78060056,2.77511069,2.76969824,2.76435988,2.75909250,2.75389319,2.74875926, +2.74368816,2.73867752,2.73372510,2.72882880,2.72398665,2.71919677,2.71445741,2.70976688, +2.70512362,2.70052613,2.69597298,2.69146283,2.68699438,2.68256642,2.67817778,2.67382735, +2.66951407,2.66523692,2.66099493,2.65678719,2.65261279,2.64847088,2.64436066,2.64028133, +2.63623214,2.63221238,2.62822133,2.62425835,2.62032277,2.61641398,2.61253138,2.60867440, +2.60484248,2.60103507,2.59725167,2.59349176,2.58975488,2.58604053,2.58234828,2.57867769, +2.57502832,2.57139977,2.56779164,2.56420354,2.56063509,2.55708594,2.55355572,2.55004409, +2.54655073,2.54307530,2.53961750,2.53617701,2.53275354,2.52934680,2.52595650,2.52258238, +2.51922417,2.51588159,2.51255441,2.50924238,2.50594525,2.50266278,2.49939476,2.49614096, +2.49290115,2.48967513,2.48646269,2.48326362,2.48007773,2.47690482,2.47374472,2.47059722, +2.46746215,2.46433933,2.46122860,2.45812977,2.45504269,2.45196720,2.44890314,2.44585034, +2.44280867,2.43977797,2.43675809,2.43374890,2.43075025,2.42776201,2.42478404,2.42181622, +2.41885841,2.41591048,2.41297232,2.41004380,2.40712480,2.40421521,2.40131491,2.39842379, +2.39554173,2.39266863,2.38980439,2.38694889,2.38410204,2.38126374,2.37843388,2.37561237, +2.37279910,2.36999400,2.36719697,2.36440790,2.36162673,2.35885335,2.35608768,2.35332964, +2.35057914,2.34783610,2.34510044,2.34237208,2.33965094,2.33693695,2.33423003,2.33153010, +2.32883709,2.32615093,2.32347155,2.32079888,2.31813284,2.31547337,2.31282041,2.31017388, +2.30753373,2.30489988,2.30227228,2.29965086,2.29703556,2.29442632,2.29182309,2.28922580, +2.28663439,2.28404881,2.28146900,2.27889490,2.27632647,2.27376364,2.27120637,2.26865460, +2.26610827,2.26356735,2.26103177,2.25850149,2.25597646,2.25345663,2.25094195,2.24843238, +2.24592786,2.24342836,2.24093382,2.23844420,2.23595946,2.23347956,2.23100444,2.22853408, +2.22606842,2.22360742,2.22115104,2.21869925,2.21625199,2.21380924,2.21137096,2.20893709, +2.20650761,2.20408248,2.20166166,2.19924511,2.19683280,2.19442469,2.19202074,2.18962092, +2.18722520,2.18483354,2.18244590,2.18006225,2.17768257,2.17530680,2.17293493,2.17056692, +2.16820274,2.16584236,2.16348574,2.16113285,2.15878367,2.15643816,2.15409630,2.15175805, +2.14942338,2.14709226,2.14476468,2.14244059,2.14011997,2.13780279,2.13548903,2.13317865, +2.13087163,2.12856795,2.12626757,2.12397047,2.12167662,2.11938600,2.11709859,2.11481435, +2.11253326,2.11025530,2.10798044,2.10570867,2.10343994,2.10117424,2.09891156,2.09665185, +2.09439510,2.09214129,2.08989040,2.08764239,2.08539725,2.08315496,2.08091550,2.07867884, +2.07644495,2.07421383,2.07198545,2.06975978,2.06753681,2.06531651,2.06309887,2.06088387, +2.05867147,2.05646168,2.05425445,2.05204979,2.04984765,2.04764804,2.04545092,2.04325628, +2.04106409,2.03887435,2.03668703,2.03450211,2.03231957,2.03013941,2.02796159,2.02578610, +2.02361292,2.02144204,2.01927344,2.01710710,2.01494300,2.01278113,2.01062146,2.00846399, +2.00630870,2.00415556,2.00200457,1.99985570,1.99770895,1.99556429,1.99342171,1.99128119, +1.98914271,1.98700627,1.98487185,1.98273942,1.98060898,1.97848051,1.97635399,1.97422942, +1.97210676,1.96998602,1.96786718,1.96575021,1.96363511,1.96152187,1.95941046,1.95730088, +1.95519310,1.95308712,1.95098292,1.94888050,1.94677982,1.94468089,1.94258368,1.94048818, +1.93839439,1.93630228,1.93421185,1.93212308,1.93003595,1.92795046,1.92586659,1.92378433, +1.92170367,1.91962459,1.91754708,1.91547113,1.91339673,1.91132385,1.90925250,1.90718266, +1.90511432,1.90304746,1.90098208,1.89891815,1.89685568,1.89479464,1.89273503,1.89067683, +1.88862003,1.88656463,1.88451060,1.88245794,1.88040664,1.87835668,1.87630806,1.87426076, +1.87221477,1.87017008,1.86812668,1.86608457,1.86404371,1.86200412,1.85996577,1.85792866, +1.85589277,1.85385809,1.85182462,1.84979234,1.84776125,1.84573132,1.84370256,1.84167495, +1.83964848,1.83762314,1.83559892,1.83357582,1.83155381,1.82953289,1.82751305,1.82549429, +1.82347658,1.82145993,1.81944431,1.81742973,1.81541617,1.81340362,1.81139207,1.80938151, +1.80737194,1.80536334,1.80335570,1.80134902,1.79934328,1.79733848,1.79533460,1.79333164, +1.79132959,1.78932843,1.78732817,1.78532878,1.78333027,1.78133261,1.77933581,1.77733985, +1.77534473,1.77335043,1.77135695,1.76936428,1.76737240,1.76538132,1.76339101,1.76140148, +1.75941271,1.75742470,1.75543743,1.75345090,1.75146510,1.74948002,1.74749565,1.74551198, +1.74352900,1.74154672,1.73956511,1.73758417,1.73560389,1.73362426,1.73164527,1.72966692, +1.72768920,1.72571209,1.72373560,1.72175971,1.71978441,1.71780969,1.71583556,1.71386199, +1.71188899,1.70991653,1.70794462,1.70597325,1.70400241,1.70203209,1.70006228,1.69809297, +1.69612416,1.69415584,1.69218799,1.69022062,1.68825372,1.68628727,1.68432127,1.68235571, +1.68039058,1.67842588,1.67646160,1.67449772,1.67253424,1.67057116,1.66860847,1.66664615, +1.66468420,1.66272262,1.66076139,1.65880050,1.65683996,1.65487975,1.65291986,1.65096028, +1.64900102,1.64704205,1.64508338,1.64312500,1.64116689,1.63920905,1.63725148,1.63529416, +1.63333709,1.63138026,1.62942366,1.62746728,1.62551112,1.62355517,1.62159943,1.61964388, +1.61768851,1.61573332,1.61377831,1.61182346,1.60986877,1.60791422,1.60595982,1.60400556, +1.60205142,1.60009739,1.59814349,1.59618968,1.59423597,1.59228235,1.59032882,1.58837536, +1.58642196,1.58446863,1.58251535,1.58056211,1.57860891,1.57665574,1.57470259,1.57274945, +1.57079633,1.56884320,1.56689007,1.56493692,1.56298375,1.56103055,1.55907731,1.55712403, +1.55517069,1.55321730,1.55126383,1.54931030,1.54735668,1.54540297,1.54344917,1.54149526, +1.53954124,1.53758710,1.53563283,1.53367843,1.53172389,1.52976919,1.52781434,1.52585933, +1.52390414,1.52194878,1.51999323,1.51803748,1.51608153,1.51412537,1.51216900,1.51021240, +1.50825556,1.50629849,1.50434117,1.50238360,1.50042576,1.49846765,1.49650927,1.49455060, +1.49259163,1.49063237,1.48867280,1.48671291,1.48475270,1.48279215,1.48083127,1.47887004, +1.47690845,1.47494650,1.47298419,1.47102149,1.46905841,1.46709493,1.46513106,1.46316677, +1.46120207,1.45923694,1.45727138,1.45530538,1.45333893,1.45137203,1.44940466,1.44743682, +1.44546850,1.44349969,1.44153038,1.43956057,1.43759024,1.43561940,1.43364803,1.43167612, +1.42970367,1.42773066,1.42575709,1.42378296,1.42180825,1.41983295,1.41785705,1.41588056, +1.41390346,1.41192573,1.40994738,1.40796840,1.40598877,1.40400849,1.40202755,1.40004594, +1.39806365,1.39608068,1.39409701,1.39211264,1.39012756,1.38814175,1.38615522,1.38416795, +1.38217994,1.38019117,1.37820164,1.37621134,1.37422025,1.37222837,1.37023570,1.36824222, +1.36624792,1.36425280,1.36225684,1.36026004,1.35826239,1.35626387,1.35426449,1.35226422, +1.35026307,1.34826101,1.34625805,1.34425418,1.34224937,1.34024364,1.33823695,1.33622932, +1.33422072,1.33221114,1.33020059,1.32818904,1.32617649,1.32416292,1.32214834,1.32013273, +1.31811607,1.31609837,1.31407960,1.31205976,1.31003885,1.30801684,1.30599373,1.30396951, +1.30194417,1.29991770,1.29789009,1.29586133,1.29383141,1.29180031,1.28976803,1.28773456, +1.28569989,1.28366400,1.28162688,1.27958854,1.27754894,1.27550809,1.27346597,1.27142257, +1.26937788,1.26733189,1.26528459,1.26323597,1.26118602,1.25913471,1.25708205,1.25502803, +1.25297262,1.25091583,1.24885763,1.24679802,1.24473698,1.24267450,1.24061058,1.23854519, +1.23647833,1.23440999,1.23234015,1.23026880,1.22819593,1.22612152,1.22404557,1.22196806, +1.21988898,1.21780832,1.21572606,1.21364219,1.21155670,1.20946958,1.20738080,1.20529037, +1.20319826,1.20110447,1.19900898,1.19691177,1.19481283,1.19271216,1.19060973,1.18850553, +1.18639955,1.18429178,1.18218219,1.18007079,1.17795754,1.17584244,1.17372548,1.17160663, +1.16948589,1.16736324,1.16523866,1.16311215,1.16098368,1.15885323,1.15672081,1.15458638, +1.15244994,1.15031147,1.14817095,1.14602836,1.14388370,1.14173695,1.13958808,1.13743709, +1.13528396,1.13312866,1.13097119,1.12881153,1.12664966,1.12448556,1.12231921,1.12015061, +1.11797973,1.11580656,1.11363107,1.11145325,1.10927308,1.10709055,1.10490563,1.10271831, +1.10052856,1.09833638,1.09614174,1.09394462,1.09174500,1.08954287,1.08733820,1.08513098, +1.08292118,1.08070879,1.07849378,1.07627614,1.07405585,1.07183287,1.06960721,1.06737882, +1.06514770,1.06291382,1.06067715,1.05843769,1.05619540,1.05395026,1.05170226,1.04945136, +1.04719755,1.04494080,1.04268110,1.04041841,1.03815271,1.03588399,1.03361221,1.03133735, +1.02905939,1.02677830,1.02449407,1.02220665,1.01991603,1.01762219,1.01532509,1.01302471, +1.01072102,1.00841400,1.00610363,1.00378986,1.00147268,0.99915206,0.99682798,0.99450039, +0.99216928,0.98983461,0.98749636,0.98515449,0.98280898,0.98045980,0.97810691,0.97575030, +0.97338991,0.97102573,0.96865772,0.96628585,0.96391009,0.96153040,0.95914675,0.95675912, +0.95436745,0.95197173,0.94957191,0.94716796,0.94475985,0.94234754,0.93993099,0.93751017, +0.93508504,0.93265556,0.93022170,0.92778341,0.92534066,0.92289341,0.92044161,0.91798524, +0.91552424,0.91305858,0.91058821,0.90811309,0.90563319,0.90314845,0.90065884,0.89816430, +0.89566479,0.89316028,0.89065070,0.88813602,0.88561619,0.88309116,0.88056088,0.87802531, +0.87548438,0.87293806,0.87038629,0.86782901,0.86526619,0.86269775,0.86012366,0.85754385, +0.85495827,0.85236686,0.84976956,0.84716633,0.84455709,0.84194179,0.83932037,0.83669277, +0.83405893,0.83141877,0.82877225,0.82611928,0.82345981,0.82079378,0.81812110,0.81544172, +0.81275556,0.81006255,0.80736262,0.80465570,0.80194171,0.79922057,0.79649221,0.79375655, +0.79101352,0.78826302,0.78550497,0.78273931,0.77996593,0.77718475,0.77439569,0.77159865, +0.76879355,0.76598029,0.76315878,0.76032891,0.75749061,0.75464376,0.75178826,0.74892402, +0.74605092,0.74316887,0.74027775,0.73737744,0.73446785,0.73154885,0.72862033,0.72568217, +0.72273425,0.71977644,0.71680861,0.71383064,0.71084240,0.70784376,0.70483456,0.70181469, +0.69878398,0.69574231,0.69268952,0.68962545,0.68654996,0.68346288,0.68036406,0.67725332, +0.67413051,0.67099544,0.66784794,0.66468783,0.66151492,0.65832903,0.65512997,0.65191753, +0.64869151,0.64545170,0.64219789,0.63892987,0.63564741,0.63235028,0.62903824,0.62571106, +0.62236849,0.61901027,0.61563615,0.61224585,0.60883911,0.60541564,0.60197515,0.59851735, +0.59504192,0.59154856,0.58803694,0.58450672,0.58095756,0.57738911,0.57380101,0.57019288, +0.56656433,0.56291496,0.55924437,0.55555212,0.55183778,0.54810089,0.54434099,0.54055758, +0.53675018,0.53291825,0.52906127,0.52517867,0.52126988,0.51733431,0.51337132,0.50938028, +0.50536051,0.50131132,0.49723200,0.49312177,0.48897987,0.48480547,0.48059772,0.47635573, +0.47207859,0.46776530,0.46341487,0.45902623,0.45459827,0.45012983,0.44561967,0.44106652, +0.43646903,0.43182577,0.42713525,0.42239588,0.41760600,0.41276385,0.40786755,0.40291513, +0.39790449,0.39283339,0.38769946,0.38250016,0.37723277,0.37189441,0.36648196,0.36099209, +0.35542120,0.34976542,0.34402054,0.33818204,0.33224495,0.32620390,0.32005298,0.31378574, +0.30739505,0.30087304,0.29421096,0.28739907,0.28042645,0.27328078,0.26594810,0.25841250, +0.25065566,0.24265636,0.23438976,0.22582651,0.21693146,0.20766198,0.19796546,0.18777575, +0.17700769,0.16554844,0.15324301,0.13986823,0.12508152,0.10830610,0.08841715,0.06251018, +}; + +double acos( double x ) { + int index; + + if (x < -1) + x = -1; + if (x > 1) + x = 1; + index = (float) (1.0 + x) * 511.9; + return acostable[index]; +} + + +double atan2( double y, double x ) { + float base; + float temp; + float dir; + float test; + int i; + + if ( x < 0 ) { + if ( y >= 0 ) { + // quad 1 + base = M_PI / 2; + temp = x; + x = y; + y = -temp; + } else { + // quad 2 + base = M_PI; + x = -x; + y = -y; + } + } else { + if ( y < 0 ) { + // quad 3 + base = 3 * M_PI / 2; + temp = x; + x = -y; + y = temp; + } + } + + if ( y > x ) { + base += M_PI/2; + temp = x; + x = y; + y = temp; + dir = -1; + } else { + dir = 1; + } + + // calcualte angle in octant 0 + if ( x == 0 ) { + return base; + } + y /= x; + + for ( i = 0 ; i < 512 ; i++ ) { + test = sintable[i] / sintable[1023-i]; + if ( test > y ) { + break; + } + } + + return base + dir * i * ( M_PI/2048); +} + + +#endif + +#ifdef Q3_VM +/* +=============== +rint +=============== +*/ +double rint( double v ) +{ + if( v >= 0.5f ) + return ceil( v ); + else + return floor( v ); +} + +// bk001127 - guarded this tan replacement +// ld: undefined versioned symbol name tan@@GLIBC_2.0 +double tan( double x ) +{ + return sin( x ) / cos( x ); +} + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +typedef union +{ + float value; + unsigned int word; +} ieee_float_shape_type; + +/* Get a 32 bit int from a float. */ + +#define GET_FLOAT_WORD(i,d) \ +do { \ + ieee_float_shape_type gf_u; \ + gf_u.value = (d); \ + (i) = gf_u.word; \ +} while (0) + +/* Set a float from a 32 bit int. */ + +#define SET_FLOAT_WORD(d,i) \ +do { \ + ieee_float_shape_type sf_u; \ + sf_u.word = (i); \ + (d) = sf_u.value; \ +} while (0) + +/* A union which permits us to convert between a float and a 32 bit + int. */ + +//acos +static const float +pi = 3.1415925026e+00, /* 0x40490fda */ +pio2_hi = 1.5707962513e+00, /* 0x3fc90fda */ +pio2_lo = 7.5497894159e-08, /* 0x33a22168 */ +pS0 = 1.6666667163e-01, /* 0x3e2aaaab */ +pS1 = -3.2556581497e-01, /* 0xbea6b090 */ +pS2 = 2.0121252537e-01, /* 0x3e4e0aa8 */ +pS3 = -4.0055535734e-02, /* 0xbd241146 */ +pS4 = 7.9153501429e-04, /* 0x3a4f7f04 */ +pS5 = 3.4793309169e-05, /* 0x3811ef08 */ +qS1 = -2.4033949375e+00, /* 0xc019d139 */ +qS2 = 2.0209457874e+00, /* 0x4001572d */ +qS3 = -6.8828397989e-01, /* 0xbf303361 */ +qS4 = 7.7038154006e-02; /* 0x3d9dc62e */ + +/* +================== +acos +================== +*/ +double acos( double x ) +{ + float z, subp, p, q, r, w, s, c, df; + int hx, ix; + + GET_FLOAT_WORD( hx, x ); + ix = hx & 0x7fffffff; + + if( ix == 0x3f800000 ) + { // |x|==1 + if( hx > 0 ) + return 0.0; // acos(1) = 0 + else + return pi + (float)2.0 * pio2_lo; // acos(-1)= pi + } + else if( ix > 0x3f800000 ) + { // |x| >= 1 + return (x-x)/(x-x); // acos(|x|>1) is NaN + } + + if( ix < 0x3f000000 ) + { // |x| < 0.5 + if( ix <= 0x23000000 ) + return pio2_hi + pio2_lo;//if|x|<2**-57 + + z = x * x; + subp = pS3 + z * ( pS4 + z * pS5 ); + // chop up expression to keep mac register based stack happy + p = z * ( pS0 + z * ( pS1 + z * ( pS2 + z * subp ) ) ); + q = 1.0 + z * ( qS1 + z * ( qS2 + z * ( qS3 + z * qS4 ) ) ); + r = p / q; + return pio2_hi - ( x - ( pio2_lo - x * r ) ); + } + else if( hx < 0 ) + { // x < -0.5 + z = ( 1.0 + x ) * (float)0.5; + subp = pS3 + z * ( pS4 + z * pS5 ); + // chop up expression to keep mac register based stack happy + p = z * ( pS0 + z * ( pS1 + z * ( pS2 + z * subp ) ) ); + q = 1.0 + z * ( qS1 + z * ( qS2 + z * ( qS3 + z * qS4 ) ) ); + s = sqrt( z ); + r = p / q; + w = r * s - pio2_lo; + return pi - (float)2.0 * ( s + w ); + } + else + { // x > 0.5 + int idf; + z = ( 1.0 - x ) * (float)0.5; + s = sqrt( z ); + df = s; + GET_FLOAT_WORD( idf, df ); + SET_FLOAT_WORD( df, idf & 0xfffff000 ); + c = ( z - df * df ) / ( s + df ); + subp = pS3 + z * ( pS4 + z * pS5 ); + // chop up expression to keep mac register based stack happy + p = z * ( pS0 + z * ( pS1 + z * ( pS2 + z * subp ) ) ); + q = 1.0 + z * ( qS1 + z * ( qS2 + z * ( qS3 + z * qS4 ) ) ); + r = p / q; + w = r * s + c; + return (double)( 2.0 * ( df + w ) ); + } +} + +//pow +static const float +bp[ ] = { 1.0, 1.5, }, +dp_h[ ] = { 0.0, 5.84960938e-01, }, /* 0x3f15c000 */ +dp_l[ ] = { 0.0, 1.56322085e-06, }, /* 0x35d1cfdc */ +huge = 1.0e+30, +tiny = 1.0e-30, +zero = 0.0, +one = 1.0, +two = 2.0, +two24 = 16777216.0, /* 0x4b800000 */ +two25 = 3.355443200e+07, /* 0x4c000000 */ +twom25 = 2.9802322388e-08, /* 0x33000000 */ + /* poly coefs for (3/2)*(log(x)-2s-2/3*s**3 */ +L1 = 6.0000002384e-01, /* 0x3f19999a */ +L2 = 4.2857143283e-01, /* 0x3edb6db7 */ +L3 = 3.3333334327e-01, /* 0x3eaaaaab */ +L4 = 2.7272811532e-01, /* 0x3e8ba305 */ +L5 = 2.3066075146e-01, /* 0x3e6c3255 */ +L6 = 2.0697501302e-01, /* 0x3e53f142 */ +P1 = 1.6666667163e-01, /* 0x3e2aaaab */ +P2 = -2.7777778450e-03, /* 0xbb360b61 */ +P3 = 6.6137559770e-05, /* 0x388ab355 */ +P4 = -1.6533901999e-06, /* 0xb5ddea0e */ +P5 = 4.1381369442e-08, /* 0x3331bb4c */ +lg2 = 6.9314718246e-01, /* 0x3f317218 */ +lg2_h = 6.93145752e-01, /* 0x3f317200 */ +lg2_l = 1.42860654e-06, /* 0x35bfbe8c */ +ovt = 4.2995665694e-08, /* -(128-log2(ovfl+.5ulp)) */ +cp = 9.6179670095e-01, /* 0x3f76384f =2/(3ln2) */ +cp_h = 9.6179199219e-01, /* 0x3f763800 =head of cp */ +cp_l = 4.7017383622e-06, /* 0x369dc3a0 =tail of cp_h */ +ivln2 = 1.4426950216e+00, /* 0x3fb8aa3b =1/ln2 */ +ivln2_h = 1.4426879883e+00, /* 0x3fb8aa00 =16b 1/ln2*/ +ivln2_l = 7.0526075433e-06; /* 0x36eca570 =1/ln2 tail*/ + +/* +================== +copysignf +================== +*/ +static float copysignf( float x, float y ) +{ + unsigned int ix, iy; + + GET_FLOAT_WORD( ix, x ); + GET_FLOAT_WORD( iy, y ); + SET_FLOAT_WORD( x, ( ix & 0x7fffffff ) | ( iy & 0x80000000 ) ); + return x; +} + +/* +================== +__scalbnf +================== +*/ +static float __scalbnf( float x, int n ) +{ + int k, ix; + + GET_FLOAT_WORD( ix, x ); + + k = ( ix & 0x7f800000 ) >> 23; /* extract exponent */ + + if( k == 0 ) + { /* 0 or subnormal x */ + if( ( ix & 0x7fffffff ) == 0 ) + return x; /* +-0 */ + + x *= two25; + GET_FLOAT_WORD( ix, x ); + k = ( ( ix & 0x7f800000 ) >> 23 ) - 25; + } + if( k == 0xff ) + return x+x; /* NaN or Inf */ + + k = k + n; + + if( n > 50000 || k > 0xfe ) + return huge * copysignf( huge, x ); /* overflow */ + if ( n < -50000 ) + return tiny * copysignf( tiny, x ); /*underflow*/ + if( k > 0 ) /* normal result */ + { + SET_FLOAT_WORD( x, ( ix & 0x807fffff ) | ( k << 23 ) ); + return x; + } + if( k <= -25 ) + return tiny * copysignf( tiny, x ); /*underflow*/ + + k += 25; /* subnormal result */ + SET_FLOAT_WORD( x, ( ix & 0x807fffff ) | ( k << 23 ) ); + return x * twom25; +} + +/* +================== +pow +================== +*/ +float pow( float x, float y ) +{ + float z, ax, z_h, z_l, p_h, p_l; + float y1, subt1, t1, t2, subr, r, s, t, u, v, w; + int i, j, k, yisint, n; + int hx, hy, ix, iy, is; + + /*TA: for some reason the Q3 VM goes apeshit when x = 1.0 + and y > 1.0. Curiously this doesn't happen with gcc + hence this hack*/ + if( x == 1.0 ) + return x; + + GET_FLOAT_WORD( hx, x ); + GET_FLOAT_WORD( hy, y ); + ix = hx & 0x7fffffff; + iy = hy & 0x7fffffff; + + /* y==zero: x**0 = 1 */ + if( iy == 0 ) + return one; + + /* +-NaN return x+y */ + if( ix > 0x7f800000 || iy > 0x7f800000 ) + return x + y; + + /* determine if y is an odd int when x < 0 + * yisint = 0 ... y is not an integer + * yisint = 1 ... y is an odd int + * yisint = 2 ... y is an even int + */ + yisint = 0; + if( hx < 0 ) + { + if( iy >= 0x4b800000 ) + yisint = 2; /* even integer y */ + else if( iy >= 0x3f800000 ) + { + k = ( iy >> 23 ) - 0x7f; /* exponent */ + j = iy >> ( 23 - k ); + if( ( j << ( 23 - k ) ) == iy ) + yisint = 2 - ( j & 1 ); + } + } + + /* special value of y */ + if( iy == 0x7f800000 ) + { /* y is +-inf */ + if( ix == 0x3f800000 ) + return y - y; /* inf**+-1 is NaN */ + else if( ix > 0x3f800000 )/* (|x|>1)**+-inf = inf,0 */ + return ( hy >= 0 ) ? y : zero; + else /* (|x|<1)**-,+inf = inf,0 */ + return ( hy < 0 ) ? -y : zero; + } + + if( iy == 0x3f800000 ) + { /* y is +-1 */ + if( hy < 0 ) + return one / x; + else + return x; + } + + if( hy == 0x40000000 ) + return x * x; /* y is 2 */ + + if( hy == 0x3f000000 ) + { /* y is 0.5 */ + if( hx >= 0 ) /* x >= +0 */ + return sqrt( x ); + } + + ax = fabs( x ); + + /* special value of x */ + if( ix == 0x7f800000 || ix == 0 || ix == 0x3f800000 ) + { + z = ax; /*x is +-0,+-inf,+-1*/ + if( hy < 0 ) + z = one / z; /* z = (1/|x|) */ + if( hx < 0 ) + { + if( ( ( ix - 0x3f800000 ) | yisint ) == 0 ) + z = ( z - z ) / ( z - z ); /* (-1)**non-int is NaN */ + else if( yisint == 1 ) + z = -z; /* (x<0)**odd = -(|x|**odd) */ + } + + return z; + } + + /* (x<0)**(non-int) is NaN */ + if( ( ( ( (unsigned int)hx >> 31 ) - 1 ) | yisint ) == 0 ) + return ( x - x ) / ( x - x ); + + /* |y| is huge */ + if( iy > 0x4d000000 ) + { /* if |y| > 2**27 */ + /* over/underflow if x is not close to one */ + if( ix < 0x3f7ffff8 ) + return ( hy < 0 ) ? huge * huge : tiny * tiny; + + if( ix > 0x3f800007 ) + return ( hy > 0 ) ? huge * huge : tiny * tiny; + /* now |1-x| is tiny <= 2**-20, suffice to compute + log(x) by x-x^2/2+x^3/3-x^4/4 */ + t = x - 1; /* t has 20 trailing zeros */ + w = ( t * t ) * ( (float)0.5 - t * ( (float)0.333333333333 - t * (float)0.25 ) ); + u = ivln2_h * t; /* ivln2_h has 16 sig. bits */ + v = t * ivln2_l - w * ivln2; + t1 = u + v; + GET_FLOAT_WORD( is, t1 ); + SET_FLOAT_WORD( t1, is & 0xfffff000 ); + t2 = v - ( t1 - u ); + } + else + { + float s2, s_h, s_l, t_h, t_l; + n = 0; + /* take care subnormal number */ + if( ix < 0x00800000 ) + { + ax *= two24; + n -= 24; + GET_FLOAT_WORD( ix, ax ); + } + + n += ( ( ix ) >> 23 ) - 0x7f; + j = ix & 0x007fffff; + + /* determine interval */ + ix = j | 0x3f800000; /* normalize ix */ + if( j <= 0x1cc471 ) + k = 0; /* |x|> 1 ) | 0x20000000 ) + 0x0040000 + ( k << 21 ) ); + t_l = ax - ( t_h - bp[ k ] ); + s_l = v * ( ( u - s_h * t_h ) - s_h * t_l ); + /* compute log(ax) */ + s2 = s * s; + subr = L3 + s2 * ( L4 + s2 * ( L5 + s2 * L6 ) ); + // chop up expression to keep mac register based stack happy + r = s2 * s2 * ( L1 + s2 * ( L2 + s2 * subr ) ); + r += s_l * ( s_h + s ); + s2 = s_h * s_h; + t_h = (float)3.0 + s2 + r; + GET_FLOAT_WORD( is, t_h ); + SET_FLOAT_WORD( t_h, is & 0xfffff000 ); + t_l = r - ( ( t_h - (float)3.0 ) - s2 ); + /* u+v = s*(1+...) */ + u = s_h * t_h; + v = s_l * t_h + t_l * s; + /* 2/(3log2)*(s+...) */ + p_h = u + v; + GET_FLOAT_WORD( is, p_h ); + SET_FLOAT_WORD( p_h, is & 0xfffff000 ); + p_l = v - ( p_h - u ); + z_h = cp_h * p_h; /* cp_h+cp_l = 2/(3*log2) */ + z_l = cp_l * p_h + p_l * cp + dp_l[ k ]; + /* log2(ax) = (s+..)*2/(3*log2) = n + dp_h + z_h + z_l */ + t = (float)n; + t1 = ( ( ( z_h + z_l ) + dp_h[ k ] ) + t ); + GET_FLOAT_WORD( is, t1 ); + SET_FLOAT_WORD( t1, is & 0xfffff000 ); + t2 = z_l - ( ( ( t1 - t ) - dp_h[ k ] ) - z_h ); + } + + s = one; /* s (sign of result -ve**odd) = -1 else = 1 */ + if( ( ( ( (unsigned int)hx >> 31 ) - 1 ) | ( yisint - 1 ) ) == 0 ) + s = -one; /* (-ve)**(odd int) */ + + /* split up y into y1+y2 and compute (y1+y2)*(t1+t2) */ + GET_FLOAT_WORD( is, y ); + SET_FLOAT_WORD( y1, is & 0xfffff000 ); + p_l = ( y - y1 ) * t1 + y * t2; + p_h = y1 * t1; + z = p_l + p_h; + GET_FLOAT_WORD( j, z ); + + if( j > 0x43000000 ) /* if z > 128 */ + return s * huge * huge; /* overflow */ + else if( j == 0x43000000 ) + { /* if z == 128 */ + if( p_l + ovt > z - p_h ) + return s * huge * huge; /* overflow */ + } + else if( ( j & 0x7fffffff ) > 0x43160000 ) /* z <= -150 */ + return s * tiny * tiny; /* underflow */ + else if( (unsigned int)j == 0xc3160000 ) + { /* z == -150 */ + if( p_l <= z - p_h ) + return s * tiny * tiny; /* underflow */ + } + + /* + * compute 2**(p_h+p_l) + */ + i = j & 0x7fffffff; + k = ( i >> 23 ) - 0x7f; + n = 0; + + if( i > 0x3f000000 ) + { /* if |z| > 0.5, set n = [z+0.5] */ + n = j + ( 0x00800000 >> ( k + 1 ) ); + k = ( ( n & 0x7fffffff ) >> 23 ) - 0x7f; /* new k for n */ + SET_FLOAT_WORD( t, n & ~( 0x007fffff >> k ) ); + n = ( ( n & 0x007fffff ) | 0x00800000 ) >> ( 23 - k ); + + if( j < 0 ) + n = -n; + + p_h -= t; + } + + t = p_l + p_h; + GET_FLOAT_WORD( is, t ); + SET_FLOAT_WORD( t, is & 0xfffff000 ); + u = t * lg2_h; + v = ( p_l - ( t - p_h ) ) * lg2 + t * lg2_l; + z = u + v; + w = v - ( z - u ); + t = z * z; + subt1 = P3 + t * ( P4 + t * P5 ); + // chop up expression to keep mac register based stack happy + t1 = z - t * ( P1 + t * ( P2 + t * subt1 ) ); + r = ( z * t1 ) / ( t1 - two ) - ( w + z * w ); + z = one - ( r - z ); + GET_FLOAT_WORD( j, z ); + j += (n << 23 ); + + if( ( j >> 23 ) <= 0 ) + z = __scalbnf( z, n ); /* subnormal output */ + else + SET_FLOAT_WORD( z, j ); + + return s * z; +} + +#endif + + + +static int randSeed = 0; + +void srand( unsigned seed ) +{ + randSeed = seed; +} + +int rand( void ) +{ + randSeed = ( 69069 * randSeed + 1 ); + return randSeed & 0x7fff; +} + +double atof( const char *string ) +{ + float sign; + float value; + int c; + + // skip whitespace + while( *string <= ' ' ) + { + if( !*string ) + return 0; + + string++; + } + + // check sign + switch( *string ) + { + case '+': + string++; + sign = 1; + break; + + case '-': + string++; + sign = -1; + break; + + default: + sign = 1; + break; + } + + // read digits + value = 0; + c = string[ 0 ]; + + if( c != '.' ) + { + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value = value * 10 + c; + } while( 1 ); + } + else + string++; + + // check for decimal point + if( c == '.' ) + { + double fraction; + + fraction = 0.1; + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value += c * fraction; + fraction *= 0.1; + } while( 1 ); + + } + + // not handling 10e10 notation... + + return value * sign; +} + +double _atof( const char **stringPtr ) +{ + const char *string; + float sign; + float value; + int c = '0'; // bk001211 - uninitialized use possible + + string = *stringPtr; + + // skip whitespace + while( *string <= ' ' ) + { + if( !*string ) + { + *stringPtr = string; + return 0; + } + + string++; + } + + // check sign + switch( *string ) + { + case '+': + string++; + sign = 1; + break; + + case '-': + string++; + sign = -1; + break; + + default: + sign = 1; + break; + } + + // read digits + value = 0; + if( string[ 0 ] != '.' ) + { + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value = value * 10 + c; + } while( 1 ); + } + + // check for decimal point + if( c == '.' ) + { + double fraction; + + fraction = 0.1; + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value += c * fraction; + fraction *= 0.1; + } while( 1 ); + + } + + // not handling 10e10 notation... + *stringPtr = string; + + return value * sign; +} + + +#if defined ( Q3_VM ) + +int atoi( const char *string ) +{ + int sign; + int value; + int c; + + // skip whitespace + while( *string <= ' ' ) + { + if( !*string ) + return 0; + + string++; + } + + // check sign + switch( *string ) + { + case '+': + string++; + sign = 1; + break; + + case '-': + string++; + sign = -1; + break; + + default: + sign = 1; + break; + } + + // read digits + value = 0; + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value = value * 10 + c; + } while( 1 ); + + // not handling 10e10 notation... + + return value * sign; +} + + +int _atoi( const char **stringPtr ) +{ + int sign; + int value; + int c; + const char *string; + + string = *stringPtr; + + // skip whitespace + while( *string <= ' ' ) + { + if( !*string ) + return 0; + + string++; + } + + // check sign + switch( *string ) + { + case '+': + string++; + sign = 1; + break; + + case '-': + string++; + sign = -1; + break; + + default: + sign = 1; + break; + } + + // read digits + value = 0; + do + { + c = *string++; + if( c < '0' || c > '9' ) + break; + + c -= '0'; + value = value * 10 + c; + } while( 1 ); + + // not handling 10e10 notation... + + *stringPtr = string; + + return value * sign; +} + +int abs( int n ) +{ + return n < 0 ? -n : n; +} + +double fabs( double x ) +{ + return x < 0 ? -x : x; +} + +unsigned int _hextoi( const char **stringPtr ) +{ + unsigned int value; + int c; + int i; + const char *string; + + string = *stringPtr; + + // skip whitespace + while( *string <= ' ' ) + { + if( !*string ) + return 0; + + string++; + } + + value = 0; + i = 0; + while( i++ < 8 && ( c = *string++ ) ) + { + if ( c >= '0' && c <= '9' ) + { + value = value * 16 + c - '0'; + continue; + } + else if ( c >= 'a' && c <= 'f' ) + { + value = value * 16 + 10 + c - 'a'; + continue; + } + else if ( c >= 'A' && c <= 'F' ) + { + value = value * 16 + 10 + c - 'A'; + continue; + } + else + break; + } + *stringPtr = string; + return value; +} + +//========================================================= + + +#define ALT 0x00000001 /* alternate form */ +#define HEX 0x00000002 /* hexadecimal */ +#define LADJUST 0x00000004 /* left adjustment */ +#define LONGDBL 0x00000008 /* long double */ +#define LONGINT 0x00000010 /* long integer */ +#define QUADINT 0x00000020 /* quad integer */ +#define SHORTINT 0x00000040 /* short integer */ +#define ZEROPAD 0x00000080 /* zero (as opposed to blank) pad */ +#define FPT 0x00000100 /* floating point number */ + +#define to_digit(c) ((c) - '0') +#define is_digit(c) ((unsigned)to_digit(c) <= 9) +#define to_char(n) ((n) + '0') + +void AddInt( char **buf_p, int val, int width, int flags ) +{ + char text[ 32 ]; + int digits; + char *buf; + + digits = 0; + + if( flags & HEX ) + { + char c; + int n = 0; + + while( n < 32 ) + { + c = "0123456789abcdef"[ ( val >> n ) & 0xF ]; + n += 4; + if( c == '0' && !digits ) + continue; + text[ digits++ ] = c; + } + text[ digits ] = '\0'; + } + else + { + int signedVal = val; + + if( val < 0 ) + val = -val; + do + { + text[ digits++ ] = '0' + val % 10; + val /= 10; + } while( val ); + + if( signedVal < 0 ) + text[ digits++ ] = '-'; + } + + buf = *buf_p; + + if( !( flags & LADJUST ) ) + { + while( digits < width ) + { + *buf++ = ( flags & ZEROPAD ) ? '0' : ' '; + width--; + } + } + + while( digits-- ) + { + *buf++ = text[ digits ]; + width--; + } + + if( flags & LADJUST ) + { + while( width-- > 0 ) + *buf++ = ( flags & ZEROPAD ) ? '0' : ' '; + } + + *buf_p = buf; +} + +void AddFloat( char **buf_p, float fval, int width, int prec ) +{ + char text[ 32 ]; + int digits; + float signedVal; + char *buf; + int val; + + // get the sign + signedVal = fval; + if( fval < 0 ) + fval = -fval; + + // write the float number + digits = 0; + val = (int)fval; + + do + { + text[ digits++ ] = '0' + val % 10; + val /= 10; + } while( val ); + + if( signedVal < 0 ) + text[digits++] = '-'; + + buf = *buf_p; + + while( digits < width ) + *buf++ = ' '; + width--; + + while( digits-- ) + *buf++ = text[ digits ]; + + *buf_p = buf; + + if( prec < 0 ) + prec = 6; + + // write the fraction + digits = 0; + + while( digits < prec ) + { + fval -= (int)fval; + fval *= 10.0; + val = (int)fval; + text[ digits++ ] = '0' + val % 10; + } + + if( digits > 0 ) + { + buf = *buf_p; + *buf++ = '.'; + for( prec = 0; prec < digits; prec++ ) + *buf++ = text[ prec ]; + + *buf_p = buf; + } +} + +void AddVec3_t( char **buf_p, vec3_t v, int width, int prec ) +{ + char *buf; + + buf = *buf_p; + + *buf++ = '['; + + AddFloat( &buf, v[ 0 ], width, prec ); + buf += width; + *buf++ = ' '; + + AddFloat( &buf, v[ 1 ], width, prec ); + buf += width; + *buf++ = ' '; + + AddFloat( &buf, v[ 2 ], width, prec ); + buf += width; + *buf++ = ']'; + + *buf_p = buf; +} + +void AddString( char **buf_p, char *string, int width, int prec ) +{ + int size; + char *buf; + + buf = *buf_p; + + if( string == NULL ) + { + string = "(null)"; + prec = -1; + } + + if( prec >= 0 ) + { + for( size = 0; size < prec; size++ ) + { + if( string[ size ] == '\0' ) + break; + } + } + else + size = strlen( string ); + + width -= size; + + while( size-- ) + *buf++ = *string++; + + while( width-- > 0 ) + *buf++ = ' '; + + *buf_p = buf; +} + +/* +vsprintf + +I'm not going to support a bunch of the more arcane stuff in here +just to keep it simpler. For example, the '*' and '$' are not +currently supported. I've tried to make it so that it will just +parse and ignore formats we don't support. +*/ +int vsprintf( char *buffer, const char *fmt, va_list argptr ) +{ + int *arg; + char *buf_p; + char ch; + int flags; + int width; + int prec; + int n; + char sign; + + buf_p = buffer; + arg = (int *)argptr; + + while( qtrue ) + { + // run through the format string until we hit a '%' or '\0' + for( ch = *fmt; ( ch = *fmt ) != '\0' && ch != '%'; fmt++ ) + *buf_p++ = ch; + + if( ch == '\0' ) + goto done; + + // skip over the '%' + fmt++; + + // reset formatting state + flags = 0; + width = 0; + prec = -1; + sign = '\0'; + +rflag: + ch = *fmt++; +reswitch: + switch( ch ) + { + case '-': + flags |= LADJUST; + goto rflag; + + case '.': + n = 0; + while( is_digit( ( ch = *fmt++ ) ) ) + n = 10 * n + ( ch - '0' ); + + prec = n < 0 ? -1 : n; + goto reswitch; + + case '0': + flags |= ZEROPAD; + goto rflag; + + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + n = 0; + do + { + n = 10 * n + ( ch - '0' ); + ch = *fmt++; + } while( is_digit( ch ) ); + + width = n; + goto reswitch; + + case 'c': + *buf_p++ = (char)*arg; + arg++; + break; + + case 'd': + case 'i': + AddInt( &buf_p, *arg, width, flags ); + arg++; + break; + + case 'f': + AddFloat( &buf_p, *(double *)arg, width, prec ); +#ifdef Q3_VM + arg += 1; // everything is 32 bit in my compiler +#else + arg += 2; +#endif + break; + + case 's': + AddString( &buf_p, (char *)*arg, width, prec ); + arg++; + break; + + case 'v': + AddVec3_t( &buf_p, (vec_t *)*arg, width, prec ); + arg++; + break; + + case 'x': + flags |= HEX; + AddInt( &buf_p, *arg, width, prec ); + arg++; + break; + + case '%': + *buf_p++ = ch; + break; + + default: + *buf_p++ = (char)*arg; + arg++; + break; + } + } + +done: + *buf_p = 0; + return buf_p - buffer; +} + + +/* this is really crappy */ +// FIXME: count is still inaccurate in some cases. +int sscanf( const char *buffer, const char *fmt, ... ) +{ + int cmd; + int **arg; + int count; + + arg = (int **)&fmt + 1; + count = 0; + + while( *fmt ) + { + if( fmt[ 0 ] != '%' ) + { + fmt++; + continue; + } + + if( !buffer[ 0 ] ) break; + + cmd = fmt[ 1 ]; + fmt += 2; + + switch( cmd ) + { + case 'i': + case 'd': + case 'u': + **arg = _atoi( &buffer ); + ++count; + break; + case 'f': + *(float *)*arg = _atof( &buffer ); + ++count; + break; + case 'x': + **arg = _hextoi( &buffer ); + ++count; + break; + } + + arg++; + } + + return count; +} + +#endif -- cgit