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rockbox/apps/plugins/puzzles/rbwrappers.c
Franklin Wei 3a70222a73 puzzles: fix star drawing in Signpost 
- change point ordering to make concave polygon rendering work
- also enables an "Easter egg" of sorts

Change-Id: I3b4044a374dce1cff889d5f3744de9e634978591
2017-07-17 17:03:03 -04:00

2321 lines
85 KiB
C
Raw Blame History

#include <puzzles.h>
#include "fixedpoint.h"
int sprintf_wrapper(char *str, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = rb->vsnprintf(str, 9999, fmt, ap);
va_end(ap);
return ret;
}
char *getenv_wrapper(const char *c)
{
if(!strcmp(c, "SIGNPOST_GEARS"))
return "y";
return NULL;
}
int puts_wrapper(const char *s)
{
LOGF("%s", s);
return 0;
}
/* fixed-point wrappers */
static long lastphase = 0, lastsin = 0, lastcos = 0x7fffffff;
double sin_wrapper(double rads)
{
/* we want [0, 2*PI) */
while(rads >= 2*PI)
rads -= 2*PI;
while(rads < 0)
rads += 2*PI;
unsigned long phase = rads/(2*PI) * 4294967296.0;
/* caching */
if(phase == lastphase)
{
return lastsin/(lastsin < 0 ? 2147483648.0 : 2147483647.0);
}
lastphase = phase;
lastsin = fp_sincos(phase, &lastcos);
return lastsin/(lastsin < 0 ? 2147483648.0 : 2147483647.0);
}
double cos_wrapper(double rads)
{
/* we want [0, 2*PI) */
while(rads >= 2*PI)
rads -= 2*PI;
while(rads < 0)
rads += 2*PI;
unsigned long phase = rads/(2*PI) * 4294967296.0;
/* caching */
if(phase == lastphase)
{
return lastcos/(lastcos < 0 ? 2147483648.0 : 2147483647.0);
}
lastphase = phase;
lastsin = fp_sincos(phase, &lastcos);
return lastcos/(lastcos < 0 ? 2147483648.0 : 2147483647.0);
}
int vsprintf_wrapper(char *s, const char *fmt, va_list ap)
{
return rb->vsnprintf(s, 9999, fmt, ap);
}
/* Absolute value, simple calculus */
float fabs_wrapper(float x)
{
return (x < 0.0f) ? -x : x;
}
float floor_wrapper(float n)
{
if(n < 0.0f)
return ((int)n - 1);
else
return (int)n;
}
/* Natural logarithm.
Taken from glibc-2.8 */
static const float
ln2_hi = 6.9313812256e-01, /* 0x3f317180 */
ln2_lo = 9.0580006145e-06, /* 0x3717f7d1 */
two25 = 3.355443200e+07, /* 0x4c000000 */
Lg1 = 6.6666668653e-01, /* 3F2AAAAB */
Lg2 = 4.0000000596e-01, /* 3ECCCCCD */
Lg3 = 2.8571429849e-01, /* 3E924925 */
Lg4 = 2.2222198546e-01, /* 3E638E29 */
Lg5 = 1.8183572590e-01, /* 3E3A3325 */
Lg6 = 1.5313838422e-01, /* 3E1CD04F */
Lg7 = 1.4798198640e-01; /* 3E178897 */
static const float zero = 0.0;
/* A union which permits us to convert between a float and a 32 bit
int. */
typedef union
{
float value;
uint32_t 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)
#ifdef ROCKBOX_LITTLE_ENDIAN
#define __HI(x) *(1+(int*)&x)
#define __LO(x) *(int*)&x
#define __HIp(x) *(1+(int*)x)
#define __LOp(x) *(int*)x
#else
#define __HI(x) *(int*)&x
#define __LO(x) *(1+(int*)&x)
#define __HIp(x) *(int*)x
#define __LOp(x) *(1+(int*)x)
#endif
static float rb_log(float x)
{
float hfsq, f, s, z, R, w, t1, t2, dk;
int32_t k, ix, i, j;
GET_FLOAT_WORD(ix,x);
k=0;
if (ix < 0x00800000) { /* x < 2**-126 */
if ((ix&0x7fffffff)==0)
return -two25/(x-x); /* log(+-0)=-inf */
if (ix<0) return (x-x)/(x-x); /* log(-#) = NaN */
k -= 25; x *= two25; /* subnormal number, scale up x */
GET_FLOAT_WORD(ix,x);
}
if (ix >= 0x7f800000) return x+x;
k += (ix>>23)-127;
ix &= 0x007fffff;
i = (ix+(0x95f64<<3))&0x800000;
SET_FLOAT_WORD(x,ix|(i^0x3f800000)); /* normalize x or x/2 */
k += (i>>23);
f = x-(float)1.0;
if((0x007fffff&(15+ix))<16) { /* |f| < 2**-20 */
if(f==zero) {
if(k==0)
return zero;
else
{
dk=(float)k;
return dk*ln2_hi+dk*ln2_lo;
}
}
R = f*f*((float)0.5-(float)0.33333333333333333*f);
if(k==0)
return f-R;
else
{
dk=(float)k;
return dk*ln2_hi-((R-dk*ln2_lo)-f);
}
}
s = f/((float)2.0+f);
dk = (float)k;
z = s*s;
i = ix-(0x6147a<<3);
w = z*z;
j = (0x6b851<<3)-ix;
t1= w*(Lg2+w*(Lg4+w*Lg6));
t2= z*(Lg1+w*(Lg3+w*(Lg5+w*Lg7)));
i |= j;
R = t2+t1;
if(i>0) {
hfsq=(float)0.5*f*f;
if(k==0)
return f-(hfsq-s*(hfsq+R));
else
return dk*ln2_hi-((hfsq-(s*(hfsq+R)+dk*ln2_lo))-f);
} else {
if(k==0)
return f-s*(f-R);
else
return dk*ln2_hi-((s*(f-R)-dk*ln2_lo)-f);
}
}
union ieee754_double
{
double d;
/* This is the IEEE 754 double-precision format. */
struct
{
#ifdef ROCKBOX_BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:11;
/* Together these comprise the mantissa. */
unsigned int mantissa0:20;
unsigned int mantissa1:32;
#else /* ROCKBOX_LITTLE_ENDIAN */
/* Together these comprise the mantissa. */
unsigned int mantissa1:32;
unsigned int mantissa0:20;
unsigned int exponent:11;
unsigned int negative:1;
#endif /* ROCKBOX_LITTLE_ENDIAN */
} ieee;
/* This format makes it easier to see if a NaN is a signalling NaN. */
struct
{
#ifdef ROCKBOX_BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:11;
unsigned int quiet_nan:1;
/* Together these comprise the mantissa. */
unsigned int mantissa0:19;
unsigned int mantissa1:32;
#else /* ROCKBOX_LITTLE_ENDIAN */
/* Together these comprise the mantissa. */
unsigned int mantissa1:32;
unsigned int mantissa0:19;
unsigned int quiet_nan:1;
unsigned int exponent:11;
unsigned int negative:1;
#endif /* ROCKBOX_LITTLE_ENDIAN */
} ieee_nan;
};
static const volatile float TWOM100 = 7.88860905e-31;
static const volatile float TWO127 = 1.7014118346e+38;
/* Exponential function,
taken from glibc-2.8
As it uses double values and udefines some symbols,
it was moved to the end of the source code */
#define W52 (2.22044605e-16)
#define W55 (2.77555756e-17)
#define W58 (3.46944695e-18)
#define W59 (1.73472348e-18)
#define W60 (8.67361738e-19)
const float __exp_deltatable[178] = {
0*W60, 16558714*W60, -10672149*W59, 1441652*W60,
-15787963*W55, 462888*W60, 7291806*W60, 1698880*W60,
-14375103*W58, -2021016*W60, 728829*W60, -3759654*W60,
3202123*W60, -10916019*W58, -251570*W60, -1043086*W60,
8207536*W60, -409964*W60, -5993931*W60, -475500*W60,
2237522*W60, 324170*W60, -244117*W60, 32077*W60,
123907*W60, -1019734*W60, -143*W60, 813077*W60,
743345*W60, 462461*W60, 629794*W60, 2125066*W60,
-2339121*W60, -337951*W60, 9922067*W60, -648704*W60,
149407*W60, -2687209*W60, -631608*W60, 2128280*W60,
-4882082*W60, 2001360*W60, 175074*W60, 2923216*W60,
-538947*W60, -1212193*W60, -1920926*W60, -1080577*W60,
3690196*W60, 2643367*W60, 2911937*W60, 671455*W60,
-1128674*W60, 593282*W60, -5219347*W60, -1941490*W60,
11007953*W60, 239609*W60, -2969658*W60, -1183650*W60,
942998*W60, 699063*W60, 450569*W60, -329250*W60,
-7257875*W60, -312436*W60, 51626*W60, 555877*W60,
-641761*W60, 1565666*W60, 884327*W60, -10960035*W60,
-2004679*W60, -995793*W60, -2229051*W60, -146179*W60,
-510327*W60, 1453482*W60, -3778852*W60, -2238056*W60,
-4895983*W60, 3398883*W60, -252738*W60, 1230155*W60,
346918*W60, 1109352*W60, 268941*W60, -2930483*W60,
-1036263*W60, -1159280*W60, 1328176*W60, 2937642*W60,
-9371420*W60, -6902650*W60, -1419134*W60, 1442904*W60,
-1319056*W60, -16369*W60, 696555*W60, -279987*W60,
-7919763*W60, 252741*W60, 459711*W60, -1709645*W60,
354913*W60, 6025867*W60, -421460*W60, -853103*W60,
-338649*W60, 962151*W60, 955965*W60, 784419*W60,
-3633653*W60, 2277133*W60, -8847927*W52, 1223028*W60,
5907079*W60, 623167*W60, 5142888*W60, 2599099*W60,
1214280*W60, 4870359*W60, 593349*W60, -57705*W60,
7761209*W60, -5564097*W60, 2051261*W60, 6216869*W60,
4692163*W60, 601691*W60, -5264906*W60, 1077872*W60,
-3205949*W60, 1833082*W60, 2081746*W60, -987363*W60,
-1049535*W60, 2015244*W60, 874230*W60, 2168259*W60,
-1740124*W60, -10068269*W60, -18242*W60, -3013583*W60,
580601*W60, -2547161*W60, -535689*W60, 2220815*W60,
1285067*W60, 2806933*W60, -983086*W60, -1729097*W60,
-1162985*W60, -2561904*W60, 801988*W60, 244351*W60,
1441893*W60, -7517981*W60, 271781*W60, -15021588*W60,
-2341588*W60, -919198*W60, 1642232*W60, 4771771*W60,
-1220099*W60, -3062372*W60, 628624*W60, 1278114*W60,
13083513*W60, -10521925*W60, 3180310*W60, -1659307*W60,
3543773*W60, 2501203*W60, 4151*W60, -340748*W60,
-2285625*W60, 2495202*W60
};
const double __exp_atable[355] /* __attribute__((mode(DF))) */ = {
0.707722561055888932371, /* 0x0.b52d4e46605c27ffd */
0.709106182438804188967, /* 0x0.b587fb96f75097ffb */
0.710492508843861281234, /* 0x0.b5e2d649899167ffd */
0.711881545564593931623, /* 0x0.b63dde74d36bdfffe */
0.713273297897442870573, /* 0x0.b699142f945f87ffc */
0.714667771153751463236, /* 0x0.b6f477909c4ea0001 */
0.716064970655995725059, /* 0x0.b75008aec758f8004 */
0.717464901723956938193, /* 0x0.b7abc7a0eea7e0002 */
0.718867569715736398602, /* 0x0.b807b47e1586c7ff8 */
0.720272979947266023271, /* 0x0.b863cf5d10e380003 */
0.721681137825144314297, /* 0x0.b8c01855195c37ffb */
0.723092048691992950199, /* 0x0.b91c8f7d213740004 */
0.724505717938892290800, /* 0x0.b97934ec5002d0007 */
0.725922150953176470431, /* 0x0.b9d608b9c92ea7ffc */
0.727341353138962865022, /* 0x0.ba330afcc29e98003 */
0.728763329918453162104, /* 0x0.ba903bcc8618b7ffc */
0.730188086709957051568, /* 0x0.baed9b40591ba0000 */
0.731615628948127705309, /* 0x0.bb4b296f931e30002 */
0.733045962086486091436, /* 0x0.bba8e671a05617ff9 */
0.734479091556371366251, /* 0x0.bc06d25dd49568001 */
0.735915022857225542529, /* 0x0.bc64ed4bce8f6fff9 */
0.737353761441304711410, /* 0x0.bcc33752f915d7ff9 */
0.738795312814142124419, /* 0x0.bd21b08af98e78005 */
0.740239682467211168593, /* 0x0.bd80590b65e9a8000 */
0.741686875913991849885, /* 0x0.bddf30ebec4a10000 */
0.743136898669507939299, /* 0x0.be3e38443c84e0007 */
0.744589756269486091620, /* 0x0.be9d6f2c1d32a0002 */
0.746045454254026796384, /* 0x0.befcd5bb59baf8004 */
0.747503998175051087583, /* 0x0.bf5c6c09ca84c0003 */
0.748965393601880857739, /* 0x0.bfbc322f5b18b7ff8 */
0.750429646104262104698, /* 0x0.c01c2843f776fffff */
0.751896761271877989160, /* 0x0.c07c4e5fa18b88002 */
0.753366744698445112140, /* 0x0.c0dca49a5fb18fffd */
0.754839601988627206827, /* 0x0.c13d2b0c444db0005 */
0.756315338768691947122, /* 0x0.c19de1cd798578006 */
0.757793960659406629066, /* 0x0.c1fec8f623723fffd */
0.759275473314173443536, /* 0x0.c25fe09e8a0f47ff8 */
0.760759882363831851927, /* 0x0.c2c128dedc88f8000 */
0.762247193485956486805, /* 0x0.c322a1cf7d6e7fffa */
0.763737412354726363781, /* 0x0.c3844b88cb9347ffc */
0.765230544649828092739, /* 0x0.c3e626232bd8f7ffc */
0.766726596071518051729, /* 0x0.c44831b719bf18002 */
0.768225572321911687194, /* 0x0.c4aa6e5d12d078001 */
0.769727479119219348810, /* 0x0.c50cdc2da64a37ffb */
0.771232322196981678892, /* 0x0.c56f7b41744490001 */
0.772740107296721268087, /* 0x0.c5d24bb1259e70004 */
0.774250840160724651565, /* 0x0.c6354d95640dd0007 */
0.775764526565368872643, /* 0x0.c6988106fec447fff */
0.777281172269557396602, /* 0x0.c6fbe61eb1bd0ffff */
0.778800783068235302750, /* 0x0.c75f7cf560942fffc */
0.780323364758801041312, /* 0x0.c7c345a3f1983fffe */
0.781848923151573727006, /* 0x0.c8274043594cb0002 */
0.783377464064598849602, /* 0x0.c88b6cec94b3b7ff9 */
0.784908993312207869935, /* 0x0.c8efcbb89cba27ffe */
0.786443516765346961618, /* 0x0.c9545cc0a88c70003 */
0.787981040257604625744, /* 0x0.c9b9201dc643bfffa */
0.789521569657452682047, /* 0x0.ca1e15e92a5410007 */
0.791065110849462849192, /* 0x0.ca833e3c1ae510005 */
0.792611669712891875319, /* 0x0.cae8992fd84667ffd */
0.794161252150049179450, /* 0x0.cb4e26ddbc207fff8 */
0.795713864077794763584, /* 0x0.cbb3e75f301b60003 */
0.797269511407239561694, /* 0x0.cc19dacd978cd8002 */
0.798828200086368567220, /* 0x0.cc8001427e55d7ffb */
0.800389937624300440456, /* 0x0.cce65ade24d360006 */
0.801954725261124767840, /* 0x0.cd4ce7a5de839fffb */
0.803522573691593189330, /* 0x0.cdb3a7c79a678fffd */
0.805093487311204114563, /* 0x0.ce1a9b563965ffffc */
0.806667472122675088819, /* 0x0.ce81c26b838db8000 */
0.808244534127439906441, /* 0x0.cee91d213f8428002 */
0.809824679342317166307, /* 0x0.cf50ab9144d92fff9 */
0.811407913793616542005, /* 0x0.cfb86dd5758c2ffff */
0.812994243520784198882, /* 0x0.d0206407c20e20005 */
0.814583674571603966162, /* 0x0.d0888e4223facfff9 */
0.816176213022088536960, /* 0x0.d0f0ec9eb3f7c8002 */
0.817771864936188586101, /* 0x0.d1597f377d6768002 */
0.819370636400374108252, /* 0x0.d1c24626a46eafff8 */
0.820972533518165570298, /* 0x0.d22b41865ff1e7ff9 */
0.822577562404315121269, /* 0x0.d2947170f32ec7ff9 */
0.824185729164559344159, /* 0x0.d2fdd60097795fff8 */
0.825797039949601741075, /* 0x0.d3676f4fb796d0001 */
0.827411500902565544264, /* 0x0.d3d13d78b5f68fffb */
0.829029118181348834154, /* 0x0.d43b40960546d8001 */
0.830649897953322891022, /* 0x0.d4a578c222a058000 */
0.832273846408250750368, /* 0x0.d50fe617a3ba78005 */
0.833900969738858188772, /* 0x0.d57a88b1218e90002 */
0.835531274148056613016, /* 0x0.d5e560a94048f8006 */
0.837164765846411529371, /* 0x0.d6506e1aac8078003 */
0.838801451086016225394, /* 0x0.d6bbb1204074e0001 */
0.840441336100884561780, /* 0x0.d72729d4c28518004 */
0.842084427144139224814, /* 0x0.d792d8530e12b0001 */
0.843730730487052604790, /* 0x0.d7febcb61273e7fff */
0.845380252404570153833, /* 0x0.d86ad718c308dfff9 */
0.847032999194574087728, /* 0x0.d8d727962c69d7fff */
0.848688977161248581090, /* 0x0.d943ae49621ce7ffb */
0.850348192619261200615, /* 0x0.d9b06b4d832ef8005 */
0.852010651900976245816, /* 0x0.da1d5ebdc22220005 */
0.853676361342631029337, /* 0x0.da8a88b555baa0006 */
0.855345327311054837175, /* 0x0.daf7e94f965f98004 */
0.857017556155879489641, /* 0x0.db6580a7c98f7fff8 */
0.858693054267390953857, /* 0x0.dbd34ed9617befff8 */
0.860371828028939855647, /* 0x0.dc4153ffc8b65fff9 */
0.862053883854957292436, /* 0x0.dcaf90368bfca8004 */
0.863739228154875360306, /* 0x0.dd1e0399328d87ffe */
0.865427867361348468455, /* 0x0.dd8cae435d303fff9 */
0.867119807911702289458, /* 0x0.ddfb9050b1cee8006 */
0.868815056264353846599, /* 0x0.de6aa9dced8448001 */
0.870513618890481399881, /* 0x0.ded9fb03db7320006 */
0.872215502247877139094, /* 0x0.df4983e1380657ff8 */
0.873920712852848668986, /* 0x0.dfb94490ffff77ffd */
0.875629257204025623884, /* 0x0.e0293d2f1cb01fff9 */
0.877341141814212965880, /* 0x0.e0996dd786fff0007 */
0.879056373217612985183, /* 0x0.e109d6a64f5d57ffc */
0.880774957955916648615, /* 0x0.e17a77b78e72a7ffe */
0.882496902590150900078, /* 0x0.e1eb5127722cc7ff8 */
0.884222213673356738383, /* 0x0.e25c63121fb0c8006 */
0.885950897802399772740, /* 0x0.e2cdad93ec5340003 */
0.887682961567391237685, /* 0x0.e33f30c925fb97ffb */
0.889418411575228162725, /* 0x0.e3b0ecce2d05ffff9 */
0.891157254447957902797, /* 0x0.e422e1bf727718006 */
0.892899496816652704641, /* 0x0.e4950fb9713fc7ffe */
0.894645145323828439008, /* 0x0.e50776d8b0e60fff8 */
0.896394206626591749641, /* 0x0.e57a1739c8fadfffc */
0.898146687421414902124, /* 0x0.e5ecf0f97c5798007 */
0.899902594367530173098, /* 0x0.e660043464e378005 */
0.901661934163603406867, /* 0x0.e6d3510747e150006 */
0.903424713533971135418, /* 0x0.e746d78f06cd97ffd */
0.905190939194458810123, /* 0x0.e7ba97e879c91fffc */
0.906960617885092856864, /* 0x0.e82e92309390b0007 */
0.908733756358986566306, /* 0x0.e8a2c6845544afffa */
0.910510361377119825629, /* 0x0.e9173500c8abc7ff8 */
0.912290439722343249336, /* 0x0.e98bddc30f98b0002 */
0.914073998177417412765, /* 0x0.ea00c0e84bc4c7fff */
0.915861043547953501680, /* 0x0.ea75de8db8094fffe */
0.917651582652244779397, /* 0x0.eaeb36d09d3137ffe */
0.919445622318405764159, /* 0x0.eb60c9ce4ed3dffff */
0.921243169397334638073, /* 0x0.ebd697a43995b0007 */
0.923044230737526172328, /* 0x0.ec4ca06fc7768fffa */
0.924848813220121135342, /* 0x0.ecc2e44e865b6fffb */
0.926656923710931002014, /* 0x0.ed39635df34e70006 */
0.928468569126343790092, /* 0x0.edb01dbbc2f5b7ffa */
0.930283756368834757725, /* 0x0.ee2713859aab57ffa */
0.932102492359406786818, /* 0x0.ee9e44d9342870004 */
0.933924784042873379360, /* 0x0.ef15b1d4635438005 */
0.935750638358567643520, /* 0x0.ef8d5a94f60f50007 */
0.937580062297704630580, /* 0x0.f0053f38f345cffff */
0.939413062815381727516, /* 0x0.f07d5fde3a2d98001 */
0.941249646905368053689, /* 0x0.f0f5bca2d481a8004 */
0.943089821583810716806, /* 0x0.f16e55a4e497d7ffe */
0.944933593864477061592, /* 0x0.f1e72b028a2827ffb */
0.946780970781518460559, /* 0x0.f2603cd9fb5430001 */
0.948631959382661205081, /* 0x0.f2d98b497d2a87ff9 */
0.950486566729423554277, /* 0x0.f353166f63e3dffff */
0.952344799896018723290, /* 0x0.f3ccde6a11ae37ffe */
0.954206665969085765512, /* 0x0.f446e357f66120000 */
0.956072172053890279009, /* 0x0.f4c12557964f0fff9 */
0.957941325265908139014, /* 0x0.f53ba48781046fffb */
0.959814132734539637840, /* 0x0.f5b66106555d07ffa */
0.961690601603558903308, /* 0x0.f6315af2c2027fffc */
0.963570739036113010927, /* 0x0.f6ac926b8aeb80004 */
0.965454552202857141381, /* 0x0.f728078f7c5008002 */
0.967342048278315158608, /* 0x0.f7a3ba7d66a908001 */
0.969233234469444204768, /* 0x0.f81fab543e1897ffb */
0.971128118008140250896, /* 0x0.f89bda33122c78007 */
0.973026706099345495256, /* 0x0.f9184738d4cf97ff8 */
0.974929006031422851235, /* 0x0.f994f284d3a5c0008 */
0.976835024947348973265, /* 0x0.fa11dc35bc7820002 */
0.978744770239899142285, /* 0x0.fa8f046b4fb7f8007 */
0.980658249138918636210, /* 0x0.fb0c6b449ab1cfff9 */
0.982575468959622777535, /* 0x0.fb8a10e1088fb7ffa */
0.984496437054508843888, /* 0x0.fc07f5602d79afffc */
0.986421160608523028820, /* 0x0.fc8618e0e55e47ffb */
0.988349647107594098099, /* 0x0.fd047b83571b1fffa */
0.990281903873210800357, /* 0x0.fd831d66f4c018002 */
0.992217938695037382475, /* 0x0.fe01fead3320bfff8 */
0.994157757657894713987, /* 0x0.fe811f703491e8006 */
0.996101369488558541238, /* 0x0.ff007fd5744490005 */
0.998048781093141101932, /* 0x0.ff801ffa9b9280007 */
1.000000000000000000000, /* 0x1.00000000000000000 */
1.001955033605393285965, /* 0x1.0080200565d29ffff */
1.003913889319761887310, /* 0x1.0100802aa0e80fff0 */
1.005876574715736104818, /* 0x1.01812090377240007 */
1.007843096764807100351, /* 0x1.020201541aad7fff6 */
1.009813464316352327214, /* 0x1.0283229c4c9820007 */
1.011787683565730677817, /* 0x1.030484836910a000e */
1.013765762469146736174, /* 0x1.0386272b9c077fffe */
1.015747708536026694351, /* 0x1.04080ab526304fff0 */
1.017733529475172815584, /* 0x1.048a2f412375ffff0 */
1.019723232714418781378, /* 0x1.050c94ef7ad5e000a */
1.021716825883923762690, /* 0x1.058f3be0f1c2d0004 */
1.023714316605201180057, /* 0x1.06122436442e2000e */
1.025715712440059545995, /* 0x1.06954e0fec63afff2 */
1.027721021151397406936, /* 0x1.0718b98f41c92fff6 */
1.029730250269221158939, /* 0x1.079c66d49bb2ffff1 */
1.031743407506447551857, /* 0x1.082056011a9230009 */
1.033760500517691527387, /* 0x1.08a487359ebd50002 */
1.035781537016238873464, /* 0x1.0928fa93490d4fff3 */
1.037806524719013578963, /* 0x1.09adb03b3e5b3000d */
1.039835471338248051878, /* 0x1.0a32a84e9e5760004 */
1.041868384612101516848, /* 0x1.0ab7e2eea5340ffff */
1.043905272300907460835, /* 0x1.0b3d603ca784f0009 */
1.045946142174331239262, /* 0x1.0bc3205a042060000 */
1.047991002016745332165, /* 0x1.0c4923682a086fffe */
1.050039859627715177527, /* 0x1.0ccf698898f3a000d */
1.052092722826109660856, /* 0x1.0d55f2dce5d1dfffb */
1.054149599440827866881, /* 0x1.0ddcbf86b09a5fff6 */
1.056210497317612961855, /* 0x1.0e63cfa7abc97fffd */
1.058275424318780855142, /* 0x1.0eeb23619c146fffb */
1.060344388322010722446, /* 0x1.0f72bad65714bffff */
1.062417397220589476718, /* 0x1.0ffa9627c38d30004 */
1.064494458915699715017, /* 0x1.1082b577d0eef0003 */
1.066575581342167566880, /* 0x1.110b18e893a90000a */
1.068660772440545025953, /* 0x1.1193c09c267610006 */
1.070750040138235936705, /* 0x1.121cacb4959befff6 */
1.072843392435016474095, /* 0x1.12a5dd543cf36ffff */
1.074940837302467588937, /* 0x1.132f529d59552000b */
1.077042382749654914030, /* 0x1.13b90cb250d08fff5 */
1.079148036789447484528, /* 0x1.14430bb58da3dfff9 */
1.081257807444460983297, /* 0x1.14cd4fc984c4a000e */
1.083371702785017154417, /* 0x1.1557d910df9c7000e */
1.085489730853784307038, /* 0x1.15e2a7ae292d30002 */
1.087611899742884524772, /* 0x1.166dbbc422d8c0004 */
1.089738217537583819804, /* 0x1.16f9157586772ffff */
1.091868692357631731528, /* 0x1.1784b4e533cacfff0 */
1.094003332327482702577, /* 0x1.18109a360fc23fff2 */
1.096142145591650907149, /* 0x1.189cc58b155a70008 */
1.098285140311341168136, /* 0x1.1929370751ea50002 */
1.100432324652149906842, /* 0x1.19b5eecdd79cefff0 */
1.102583706811727015711, /* 0x1.1a42ed01dbdba000e */
1.104739294993289488947, /* 0x1.1ad031c69a2eafff0 */
1.106899097422573863281, /* 0x1.1b5dbd3f66e120003 */
1.109063122341542140286, /* 0x1.1beb8f8fa8150000b */
1.111231377994659874592, /* 0x1.1c79a8dac6ad0fff4 */
1.113403872669181282605, /* 0x1.1d0809445a97ffffc */
1.115580614653132185460, /* 0x1.1d96b0effc9db000e */
1.117761612217810673898, /* 0x1.1e25a001332190000 */
1.119946873713312474002, /* 0x1.1eb4d69bdb2a9fff1 */
1.122136407473298902480, /* 0x1.1f4454e3bfae00006 */
1.124330221845670330058, /* 0x1.1fd41afcbb48bfff8 */
1.126528325196519908506, /* 0x1.2064290abc98c0001 */
1.128730725913251964394, /* 0x1.20f47f31c9aa7000f */
1.130937432396844410880, /* 0x1.21851d95f776dfff0 */
1.133148453059692917203, /* 0x1.2216045b6784efffa */
1.135363796355857157764, /* 0x1.22a733a6692ae0004 */
1.137583470716100553249, /* 0x1.2338ab9b3221a0004 */
1.139807484614418608939, /* 0x1.23ca6c5e27aadfff7 */
1.142035846532929888057, /* 0x1.245c7613b7f6c0004 */
1.144268564977221958089, /* 0x1.24eec8e06b035000c */
1.146505648458203463465, /* 0x1.258164e8cea85fff8 */
1.148747105501412235671, /* 0x1.26144a5180d380009 */
1.150992944689175123667, /* 0x1.26a7793f5de2efffa */
1.153243174560058870217, /* 0x1.273af1d712179000d */
1.155497803703682491111, /* 0x1.27ceb43d81d42fff1 */
1.157756840726344771440, /* 0x1.2862c097a3d29000c */
1.160020294239811677834, /* 0x1.28f7170a74cf4fff1 */
1.162288172883275239058, /* 0x1.298bb7bb0faed0004 */
1.164560485298402170388, /* 0x1.2a20a2ce920dffff4 */
1.166837240167474476460, /* 0x1.2ab5d86a4631ffff6 */
1.169118446164539637555, /* 0x1.2b4b58b36d5220009 */
1.171404112007080167155, /* 0x1.2be123cf786790002 */
1.173694246390975415341, /* 0x1.2c7739e3c0aac000d */
1.175988858069749065617, /* 0x1.2d0d9b15deb58fff6 */
1.178287955789017793514, /* 0x1.2da4478b627040002 */
1.180591548323240091978, /* 0x1.2e3b3f69fb794fffc */
1.182899644456603782686, /* 0x1.2ed282d76421d0004 */
1.185212252993012693694, /* 0x1.2f6a11f96c685fff3 */
1.187529382762033236513, /* 0x1.3001ecf60082ffffa */
1.189851042595508889847, /* 0x1.309a13f30f28a0004 */
1.192177241354644978669, /* 0x1.31328716a758cfff7 */
1.194507987909589896687, /* 0x1.31cb4686e1e85fffb */
1.196843291137896336843, /* 0x1.32645269dfd04000a */
1.199183159977805113226, /* 0x1.32fdaae604c39000f */
1.201527603343041317132, /* 0x1.339750219980dfff3 */
1.203876630171082595692, /* 0x1.3431424300e480007 */
1.206230249419600664189, /* 0x1.34cb8170b3fee000e */
1.208588470077065268869, /* 0x1.35660dd14dbd4fffc */
1.210951301134513435915, /* 0x1.3600e78b6bdfc0005 */
1.213318751604272271958, /* 0x1.369c0ec5c38ebfff2 */
1.215690830512196507537, /* 0x1.373783a718d29000f */
1.218067546930756250870, /* 0x1.37d3465662f480007 */
1.220448909901335365929, /* 0x1.386f56fa770fe0008 */
1.222834928513994334780, /* 0x1.390bb5ba5fc540004 */
1.225225611877684750397, /* 0x1.39a862bd3c7a8fff3 */
1.227620969111500981433, /* 0x1.3a455e2a37bcafffd */
1.230021009336254911271, /* 0x1.3ae2a8287dfbefff6 */
1.232425741726685064472, /* 0x1.3b8040df76f39fffa */
1.234835175450728295084, /* 0x1.3c1e287682e48fff1 */
1.237249319699482263931, /* 0x1.3cbc5f151b86bfff8 */
1.239668183679933477545, /* 0x1.3d5ae4e2cc0a8000f */
1.242091776620540377629, /* 0x1.3df9ba07373bf0006 */
1.244520107762172811399, /* 0x1.3e98deaa0d8cafffe */
1.246953186383919165383, /* 0x1.3f3852f32973efff0 */
1.249391019292643401078, /* 0x1.3fd816ffc72b90001 */
1.251833623164381181797, /* 0x1.40782b17863250005 */
1.254280999953110153911, /* 0x1.41188f42caf400000 */
1.256733161434815393410, /* 0x1.41b943b42945bfffd */
1.259190116985283935980, /* 0x1.425a4893e5f10000a */
1.261651875958665236542, /* 0x1.42fb9e0a2df4c0009 */
1.264118447754797758244, /* 0x1.439d443f608c4fff9 */
1.266589841787181258708, /* 0x1.443f3b5bebf850008 */
1.269066067469190262045, /* 0x1.44e183883e561fff7 */
1.271547134259576328224, /* 0x1.45841cecf7a7a0001 */
1.274033051628237434048, /* 0x1.462707b2c43020009 */
1.276523829025464573684, /* 0x1.46ca44023aa410007 */
1.279019475999373156531, /* 0x1.476dd2045d46ffff0 */
1.281520002043128991825, /* 0x1.4811b1e1f1f19000b */
1.284025416692967214122, /* 0x1.48b5e3c3edd74fff4 */
1.286535729509738823464, /* 0x1.495a67d3613c8fff7 */
1.289050950070396384145, /* 0x1.49ff3e396e19d000b */
1.291571087985403654081, /* 0x1.4aa4671f5b401fff1 */
1.294096152842774794011, /* 0x1.4b49e2ae56d19000d */
1.296626154297237043484, /* 0x1.4befb10fd84a3fff4 */
1.299161101984141142272, /* 0x1.4c95d26d41d84fff8 */
1.301701005575179204100, /* 0x1.4d3c46f01d9f0fff3 */
1.304245874766450485904, /* 0x1.4de30ec21097d0003 */
1.306795719266019562007, /* 0x1.4e8a2a0ccce3d0002 */
1.309350548792467483458, /* 0x1.4f3198fa10346fff5 */
1.311910373099227200545, /* 0x1.4fd95bb3be8cffffd */
1.314475201942565174546, /* 0x1.50817263bf0e5fffb */
1.317045045107389400535, /* 0x1.5129dd3418575000e */
1.319619912422941299109, /* 0x1.51d29c4f01c54ffff */
1.322199813675649204855, /* 0x1.527bafde83a310009 */
1.324784758729532718739, /* 0x1.5325180cfb8b3fffd */
1.327374757430096474625, /* 0x1.53ced504b2bd0fff4 */
1.329969819671041886272, /* 0x1.5478e6f02775e0001 */
1.332569955346704748651, /* 0x1.55234df9d8a59fff8 */
1.335175174370685002822, /* 0x1.55ce0a4c5a6a9fff6 */
1.337785486688218616860, /* 0x1.56791c1263abefff7 */
1.340400902247843806217, /* 0x1.57248376aef21fffa */
1.343021431036279800211, /* 0x1.57d040a420c0bfff3 */
1.345647083048053138662, /* 0x1.587c53c5a630f0002 */
1.348277868295411074918, /* 0x1.5928bd063fd7bfff9 */
1.350913796821875845231, /* 0x1.59d57c9110ad60006 */
1.353554878672557082439, /* 0x1.5a8292913d68cfffc */
1.356201123929036356254, /* 0x1.5b2fff3212db00007 */
1.358852542671913132777, /* 0x1.5bddc29edcc06fff3 */
1.361509145047255398051, /* 0x1.5c8bdd032ed16000f */
1.364170941142184734180, /* 0x1.5d3a4e8a5bf61fff4 */
1.366837941171020309735, /* 0x1.5de9176042f1effff */
1.369510155261156381121, /* 0x1.5e9837b062f4e0005 */
1.372187593620959988833, /* 0x1.5f47afa69436cfff1 */
1.374870266463378287715, /* 0x1.5ff77f6eb3f8cfffd */
1.377558184010425845733, /* 0x1.60a7a734a9742fff9 */
1.380251356531521533853, /* 0x1.6158272490016000c */
1.382949794301995272203, /* 0x1.6208ff6a8978a000f */
1.385653507605306700170, /* 0x1.62ba3032c0a280004 */
1.388362506772382154503, /* 0x1.636bb9a994784000f */
1.391076802081129493127, /* 0x1.641d9bfb29a7bfff6 */
1.393796403973427855412, /* 0x1.64cfd7545928b0002 */
1.396521322756352656542, /* 0x1.65826be167badfff8 */
1.399251568859207761660, /* 0x1.663559cf20826000c */
1.401987152677323100733, /* 0x1.66e8a14a29486fffc */
1.404728084651919228815, /* 0x1.679c427f5a4b6000b */
1.407474375243217723560, /* 0x1.68503d9ba0add000f */
1.410226034922914983815, /* 0x1.690492cbf6303fff9 */
1.412983074197955213304, /* 0x1.69b9423d7b548fff6 */
};
/* All floating-point numbers can be put in one of these categories. */
enum
{
FP_NAN,
# define FP_NAN FP_NAN
FP_INFINITE,
# define FP_INFINITE FP_INFINITE
FP_ZERO,
# define FP_ZERO FP_ZERO
FP_SUBNORMAL,
# define FP_SUBNORMAL FP_SUBNORMAL
FP_NORMAL
# define FP_NORMAL FP_NORMAL
};
int
__fpclassifyf (float x)
{
uint32_t wx;
int retval = FP_NORMAL;
GET_FLOAT_WORD (wx, x);
wx &= 0x7fffffff;
if (wx == 0)
retval = FP_ZERO;
else if (wx < 0x800000)
retval = FP_SUBNORMAL;
else if (wx >= 0x7f800000)
retval = wx > 0x7f800000 ? FP_NAN : FP_INFINITE;
return retval;
}
int
__isinff (float x)
{
int32_t ix,t;
GET_FLOAT_WORD(ix,x);
t = ix & 0x7fffffff;
t ^= 0x7f800000;
t |= -t;
return ~(t >> 31) & (ix >> 30);
}
/* Return nonzero value if arguments are unordered. */
#define fpclassify(x) \
(sizeof (x) == sizeof (float) ? __fpclassifyf (x) : __fpclassifyf (x))
#ifndef isunordered
#define isunordered(u, v) \
(__extension__ \
({ __typeof__(u) __u = (u); __typeof__(v) __v = (v); \
fpclassify (__u) == FP_NAN || fpclassify (__v) == FP_NAN; }))
#endif
/* Return nonzero value if X is less than Y. */
#ifndef isless
#define isless(x, y) \
(__extension__ \
({ __typeof__(x) __x = (x); __typeof__(y) __y = (y); \
!isunordered (__x, __y) && __x < __y; }))
#endif
/* Return nonzero value if X is greater than Y. */
#ifndef isgreater
#define isgreater(x, y) \
(__extension__ \
({ __typeof__(x) __x = (x); __typeof__(y) __y = (y); \
!isunordered (__x, __y) && __x > __y; }))
#endif
float rb_exp(float x)
{
static const float himark = 88.72283935546875;
static const float lomark = -103.972084045410;
/* Check for usual case. */
if (isless (x, himark) && isgreater (x, lomark))
{
static const float THREEp42 = 13194139533312.0;
static const float THREEp22 = 12582912.0;
/* 1/ln(2). */
#undef M_1_LN2
static const float M_1_LN2 = 1.44269502163f;
/* ln(2) */
#undef M_LN2
static const double M_LN2 = .6931471805599452862;
int tval;
double x22, t, result, dx;
float n, delta;
union ieee754_double ex2_u;
#ifndef ROCKBOX
fenv_t oldenv;
feholdexcept (&oldenv);
#endif
#ifdef FE_TONEAREST
fesetround (FE_TONEAREST);
#endif
/* Calculate n. */
n = x * M_1_LN2 + THREEp22;
n -= THREEp22;
dx = x - n*M_LN2;
/* Calculate t/512. */
t = dx + THREEp42;
t -= THREEp42;
dx -= t;
/* Compute tval = t. */
tval = (int) (t * 512.0);
if (t >= 0)
delta = - __exp_deltatable[tval];
else
delta = __exp_deltatable[-tval];
/* Compute ex2 = 2^n e^(t/512+delta[t]). */
ex2_u.d = __exp_atable[tval+177];
ex2_u.ieee.exponent += (int) n;
/* Approximate e^(dx+delta) - 1, using a second-degree polynomial,
with maximum error in [-2^-10-2^-28,2^-10+2^-28]
less than 5e-11. */
x22 = (0.5000000496709180453 * dx + 1.0000001192102037084) * dx + delta;
/* Return result. */
#ifndef ROCKBOX
fesetenv (&oldenv);
#endif
result = x22 * ex2_u.d + ex2_u.d;
return (float) result;
}
/* Exceptional cases: */
else if (isless (x, himark))
{
if (__isinff (x))
/* e^-inf == 0, with no error. */
return 0;
else
/* Underflow */
return TWOM100 * TWOM100;
}
else
/* Return x, if x is a NaN or Inf; or overflow, otherwise. */
return TWO127*x;
}
/* Arc tangent,
taken from glibc-2.8. */
static const float atanhi[] = {
4.6364760399e-01, /* atan(0.5)hi 0x3eed6338 */
7.8539812565e-01, /* atan(1.0)hi 0x3f490fda */
9.8279368877e-01, /* atan(1.5)hi 0x3f7b985e */
1.5707962513e+00, /* atan(inf)hi 0x3fc90fda */
};
static const float atanlo[] = {
5.0121582440e-09, /* atan(0.5)lo 0x31ac3769 */
3.7748947079e-08, /* atan(1.0)lo 0x33222168 */
3.4473217170e-08, /* atan(1.5)lo 0x33140fb4 */
7.5497894159e-08, /* atan(inf)lo 0x33a22168 */
};
static const float aT[] = {
3.3333334327e-01, /* 0x3eaaaaaa */
-2.0000000298e-01, /* 0xbe4ccccd */
1.4285714924e-01, /* 0x3e124925 */
-1.1111110449e-01, /* 0xbde38e38 */
9.0908870101e-02, /* 0x3dba2e6e */
-7.6918758452e-02, /* 0xbd9d8795 */
6.6610731184e-02, /* 0x3d886b35 */
-5.8335702866e-02, /* 0xbd6ef16b */
4.9768779427e-02, /* 0x3d4bda59 */
-3.6531571299e-02, /* 0xbd15a221 */
1.6285819933e-02, /* 0x3c8569d7 */
};
static const float
huge = 1.0e+30,
tiny = 1.0e-30,
one = 1.0f;
float atan_wrapper(float x)
{
float w,s1,s2,z;
int32_t ix,hx,id;
GET_FLOAT_WORD(hx,x);
ix = hx&0x7fffffff;
if(ix>=0x50800000) { /* if |x| >= 2^34 */
if(ix>0x7f800000)
return x+x; /* NaN */
if(hx>0) return atanhi[3]+atanlo[3];
else return -atanhi[3]-atanlo[3];
} if (ix < 0x3ee00000) { /* |x| < 0.4375 */
if (ix < 0x31000000) { /* |x| < 2^-29 */
if(huge+x>one) return x; /* raise inexact */
}
id = -1;
} else {
x = fabs_wrapper(x);
if (ix < 0x3f980000) { /* |x| < 1.1875 */
if (ix < 0x3f300000) { /* 7/16 <=|x|<11/16 */
id = 0; x = ((float)2.0*x-one)/((float)2.0+x);
} else { /* 11/16<=|x|< 19/16 */
id = 1; x = (x-one)/(x+one);
}
} else {
if (ix < 0x401c0000) { /* |x| < 2.4375 */
id = 2; x = (x-(float)1.5)/(one+(float)1.5*x);
} else { /* 2.4375 <= |x| < 2^66 */
id = 3; x = -(float)1.0/x;
}
}}
/* end of argument reduction */
z = x*x;
w = z*z;
/* break sum from i=0 to 10 aT[i]z**(i+1) into odd and even poly */
s1 = z*(aT[0]+w*(aT[2]+w*(aT[4]+w*(aT[6]+w*(aT[8]+w*aT[10])))));
s2 = w*(aT[1]+w*(aT[3]+w*(aT[5]+w*(aT[7]+w*aT[9]))));
if (id<0) return x - x*(s1+s2);
else {
z = atanhi[id] - ((x*(s1+s2) - atanlo[id]) - x);
return (hx<0)? -z:z;
}
}
/* Arc tangent from two variables, original. */
static const float
pi_o_4 = 7.8539818525e-01, /* 0x3f490fdb */
pi_o_2 = 1.5707963705e+00, /* 0x3fc90fdb */
pi = 3.1415927410e+00, /* 0x40490fdb */
pi_lo = -8.7422776573e-08; /* 0xb3bbbd2e */
float atan2_wrapper(float y, float x)
{
float z;
int32_t k,m,hx,hy,ix,iy;
GET_FLOAT_WORD(hx,x);
ix = hx&0x7fffffff;
GET_FLOAT_WORD(hy,y);
iy = hy&0x7fffffff;
if((ix>0x7f800000)||
(iy>0x7f800000)) /* x or y is NaN */
return x+y;
if(hx==0x3f800000) return atan_wrapper(y); /* x=1.0 */
m = ((hy>>31)&1)|((hx>>30)&2); /* 2*sign(x)+sign(y) */
/* when y = 0 */
if(iy==0) {
switch(m) {
case 0:
case 1: return y; /* atan(+-0,+anything)=+-0 */
case 2: return pi+tiny;/* atan(+0,-anything) = pi */
case 3: return -pi-tiny;/* atan(-0,-anything) =-pi */
}
}
/* when x = 0 */
if(ix==0) return (hy<0)? -pi_o_2-tiny: pi_o_2+tiny;
/* when x is INF */
if(ix==0x7f800000) {
if(iy==0x7f800000) {
switch(m) {
case 0: return pi_o_4+tiny;/* atan(+INF,+INF) */
case 1: return -pi_o_4-tiny;/* atan(-INF,+INF) */
case 2: return (float)3.0*pi_o_4+tiny;/*atan(+INF,-INF)*/
case 3: return (float)-3.0*pi_o_4-tiny;/*atan(-INF,-INF)*/
}
} else {
switch(m) {
case 0: return zero ; /* atan(+...,+INF) */
case 1: return -zero ; /* atan(-...,+INF) */
case 2: return pi+tiny ; /* atan(+...,-INF) */
case 3: return -pi-tiny ; /* atan(-...,-INF) */
}
}
}
/* when y is INF */
if(iy==0x7f800000) return (hy<0)? -pi_o_2-tiny: pi_o_2+tiny;
/* compute y/x */
k = (iy-ix)>>23;
if(k > 60) z=pi_o_2+(float)0.5*pi_lo; /* |y/x| > 2**60 */
else if(hx<0&&k<-60) z=0.0; /* |y|/x < -2**60 */
else z=atan_wrapper(fabs_wrapper(y/x)); /* safe to do y/x */
switch (m) {
case 0: return z ; /* atan(+,+) */
case 1: {
uint32_t zh;
GET_FLOAT_WORD(zh,z);
SET_FLOAT_WORD(z,zh ^ 0x80000000);
}
return z ; /* atan(-,+) */
case 2: return pi-(z-pi_lo);/* atan(+,-) */
default: /* case 3 */
return (z-pi_lo)-pi;/* atan(-,-) */
}
}
/* Square root function, original. */
float sqrt_wrapper(float x)
{
float z;
int32_t sign = (int)0x80000000;
int32_t ix,s,q,m,t,i;
uint32_t r;
GET_FLOAT_WORD(ix,x);
/* take care of Inf and NaN */
if((ix&0x7f800000)==0x7f800000) {
return x*x+x; /* sqrt(NaN)=NaN, sqrt(+inf)=+inf
sqrt(-inf)=sNaN */
}
/* take care of zero */
if(ix<=0) {
if((ix&(~sign))==0) return x;/* sqrt(+-0) = +-0 */
else if(ix<0)
return (x-x)/(x-x); /* sqrt(-ve) = sNaN */
}
/* normalize x */
m = (ix>>23);
if(m==0) { /* subnormal x */
for(i=0;(ix&0x00800000)==0;i++) ix<<=1;
m -= i-1;
}
m -= 127; /* unbias exponent */
ix = (ix&0x007fffff)|0x00800000;
if(m&1) /* odd m, double x to make it even */
ix += ix;
m >>= 1; /* m = [m/2] */
/* generate sqrt(x) bit by bit */
ix += ix;
q = s = 0; /* q = sqrt(x) */
r = 0x01000000; /* r = moving bit from right to left */
while(r!=0) {
t = s+r;
if(t<=ix) {
s = t+r;
ix -= t;
q += r;
}
ix += ix;
r>>=1;
}
/* use floating add to find out rounding direction */
if(ix!=0) {
z = one-tiny; /* trigger inexact flag */
if (z>=one) {
z = one+tiny;
if (z>one)
q += 2;
else
q += (q&1);
}
}
ix = (q>>1)+0x3f000000;
ix += (m <<23);
SET_FLOAT_WORD(z,ix);
return z;
}
/* hack, simple trig */
double acos_wrapper(double x)
{
return atan2_wrapper(sqrt_wrapper(1.0 - x * x), x);
}
/*
* Copyright (C) 2004 by egnite Software GmbH. 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. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH 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 EGNITE
* SOFTWARE GMBH 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.
*
* For additional information see http://www.ethernut.de/
*
*-
* Copyright (c) 1990 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. 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.
*/
/*
* $Log$
* Revision 1.4 2008/02/15 17:13:01 haraldkipp
* Use configurable constant attribute.
*
* Revision 1.3 2006/10/08 16:48:08 haraldkipp
* Documentation fixed
*
* Revision 1.2 2005/08/02 17:46:47 haraldkipp
* Major API documentation update.
*
* Revision 1.1 2004/09/08 10:23:35 haraldkipp
* Generic C stdlib added
*
*/
#define CONST const
long strtol_wrapper(CONST char *nptr, char **endptr, int base)
{
register CONST char *s;
register long acc, cutoff;
register int c;
register int neg, any, cutlim;
/*
* Skip white space and pick up leading +/- sign if any.
* If base is 0, allow 0x for hex and 0 for octal, else
* assume decimal; if base is already 16, allow 0x.
*/
s = nptr;
do {
c = (unsigned char) *s++;
} while (isspace(c));
if (c == '-') {
neg = 1;
c = *s++;
} else {
neg = 0;
if (c == '+')
c = *s++;
}
if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) {
c = s[1];
s += 2;
base = 16;
}
if (base == 0)
base = c == '0' ? 8 : 10;
/*
* Compute the cutoff value between legal numbers and illegal
* numbers. That is the largest legal value, divided by the
* base. An input number that is greater than this value, if
* followed by a legal input character, is too big. One that
* is equal to this value may be valid or not; the limit
* between valid and invalid numbers is then based on the last
* digit. For instance, if the range for longs is
* [-2147483648..2147483647] and the input base is 10,
* cutoff will be set to 214748364 and cutlim to either
* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
* a value > 214748364, or equal but the next digit is > 7 (or 8),
* the number is too big, and we will return a range error.
*
* Set any if any `digits' consumed; make it negative to indicate
* overflow.
*/
cutoff = neg ? LONG_MIN : LONG_MAX;
cutlim = cutoff % base;
cutoff /= base;
if (neg) {
if (cutlim > 0) {
cutlim -= base;
cutoff += 1;
}
cutlim = -cutlim;
}
for (acc = 0, any = 0;; c = (unsigned char) *s++) {
if (isdigit(c))
c -= '0';
else if (isalpha(c))
c -= isupper(c) ? 'A' - 10 : 'a' - 10;
else
break;
if (c >= base)
break;
if (any < 0)
continue;
if (neg) {
if ((acc < cutoff || acc == cutoff) && c > cutlim) {
any = -1;
acc = LONG_MIN;
} else {
any = 1;
acc *= base;
acc -= c;
}
} else {
if ((acc > cutoff || acc == cutoff) && c > cutlim) {
any = -1;
acc = LONG_MAX;
} else {
any = 1;
acc *= base;
acc += c;
}
}
}
if (endptr != 0)
*endptr = (char *) (any ? s - 1 : nptr);
return (acc);
}
int64_t strtoq_wrapper(CONST char *nptr, char **endptr, int base)
{
return strtol(nptr, endptr, base);
}
uint64_t strtouq_wrapper(CONST char *nptr, char **endptr, int base)
{
return strtol(nptr, endptr, base);
}
/* Power function, taken from glibc-2.8 and dietlibc-0.32 */
float pow_wrapper(float x, float y)
{
unsigned int e;
float result;
/* Special cases 0^x */
if(x == 0.0f)
{
if(y > 0.0f)
return 0.0f;
else if(y == 0.0f)
return 1.0f;
else
return 1.0f / x;
}
/* Special case x^n where n is integer */
if(y == (int) (e = (int) y))
{
if((int) e < 0)
{
e = -e;
x = 1.0f / x;
}
result = 1.0f;
while(1)
{
if(e & 1)
result *= x;
if((e >>= 1) == 0)
break;
x *= x;
}
return result;
}
/* Normal case */
return rb_exp(rb_log(x) * y);
}
/* @(#)s_copysign.c 1.3 95/01/18 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunSoft, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* copysign(double x, double y)
* copysign(x,y) returns a value with the magnitude of x and
* with the sign bit of y.
*/
double copysign_wrapper(double x, double y)
{
__HI(x) = (__HI(x)&0x7fffffff)|(__HI(y)&0x80000000);
return x;
}
/* @(#)s_scalbn.c 1.3 95/01/18 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunSoft, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* scalbn (double x, int n)
* scalbn(x,n) returns x* 2**n computed by exponent
* manipulation rather than by actually performing an
* exponentiation or a multiplication.
*/
#ifdef __STDC__
static const double
#else
static double
#endif
two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
twom54 = 5.55111512312578270212e-17; /* 0x3C900000, 0x00000000 */
double scalbn_wrapper (double x, int n)
{
int k,hx,lx;
hx = __HI(x);
lx = __LO(x);
k = (hx&0x7ff00000)>>20; /* extract exponent */
if (k==0) { /* 0 or subnormal x */
if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
x *= two54;
hx = __HI(x);
k = ((hx&0x7ff00000)>>20) - 54;
if (n< -50000) return tiny*x; /*underflow*/
}
if (k==0x7ff) return x+x; /* NaN or Inf */
k = k+n;
if (k > 0x7fe) return huge*copysign_wrapper(huge,x); /* overflow */
if (k > 0) /* normal result */
{__HI(x) = (hx&0x800fffff)|(k<<20); return x;}
if (k <= -54)
{
if (n > 50000) /* in case integer overflow in n+k */
return huge*copysign_wrapper(huge,x); /*overflow*/
else
return tiny*copysign_wrapper(tiny,x); /*underflow*/
}
k += 54; /* subnormal result */
__HI(x) = (hx&0x800fffff)|(k<<20);
return x*twom54;
}
/* horrible hack */
float ceil_wrapper(float x)
{
return floor_wrapper(x) + 1.0;
}
/* Implementation of strtod() and atof(),
taken from SanOS (http://www.jbox.dk/sanos/). */
static int rb_errno = 0;
static double rb_strtod(const char *str, char **endptr)
{
double number;
int exponent;
int negative;
char *p = (char *) str;
double p10;
int n;
int num_digits;
int num_decimals;
/* Reset Rockbox errno -- W.B. */
#ifdef ROCKBOX
rb_errno = 0;
#endif
// Skip leading whitespace
while (isspace(*p)) p++;
// Handle optional sign
negative = 0;
switch (*p)
{
case '-': negative = 1; // Fall through to increment position
case '+': p++;
}
number = 0.;
exponent = 0;
num_digits = 0;
num_decimals = 0;
// Process string of digits
while (isdigit(*p))
{
number = number * 10. + (*p - '0');
p++;
num_digits++;
}
// Process decimal part
if (*p == '.')
{
p++;
while (isdigit(*p))
{
number = number * 10. + (*p - '0');
p++;
num_digits++;
num_decimals++;
}
exponent -= num_decimals;
}
if (num_digits == 0)
{
#ifdef ROCKBOX
rb_errno = 1;
#else
errno = ERANGE;
#endif
return 0.0;
}
// Correct for sign
if (negative) number = -number;
// Process an exponent string
if (*p == 'e' || *p == 'E')
{
// Handle optional sign
negative = 0;
switch(*++p)
{
case '-': negative = 1; // Fall through to increment pos
case '+': p++;
}
// Process string of digits
n = 0;
while (isdigit(*p))
{
n = n * 10 + (*p - '0');
p++;
}
if (negative)
exponent -= n;
else
exponent += n;
}
#ifndef ROCKBOX
if (exponent < DBL_MIN_EXP || exponent > DBL_MAX_EXP)
{
errno = ERANGE;
return HUGE_VAL;
}
#endif
// Scale the result
p10 = 10.;
n = exponent;
if (n < 0) n = -n;
while (n)
{
if (n & 1)
{
if (exponent < 0)
number /= p10;
else
number *= p10;
}
n >>= 1;
p10 *= p10;
}
#ifndef ROCKBOX
if (number == HUGE_VAL) errno = ERANGE;
#endif
if (endptr) *endptr = p;
return number;
}
double atof_wrapper(const char *str)
{
return rb_strtod(str, NULL);
}
/*
* Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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 "rbcompat.h"
#define BUF 32 /* Maximum length of numeric string. */
/*
* Flags used during conversion.
*/
#define LONG 0x01 /* l: long or double */
#define SHORT 0x04 /* h: short */
#define SUPPRESS 0x08 /* *: suppress assignment */
#define POINTER 0x10 /* p: void * (as hex) */
#define NOSKIP 0x20 /* [ or c: do not skip blanks */
#define LONGLONG 0x400 /* ll: long long (+ deprecated q: quad) */
#define SHORTSHORT 0x4000 /* hh: char */
#define UNSIGNED 0x8000 /* %[oupxX] conversions */
/*
* The following are used in numeric conversions only:
* SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
* SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
*/
#define SIGNOK 0x40 /* +/- is (still) legal */
#define NDIGITS 0x80 /* no digits detected */
#define DPTOK 0x100 /* (float) decimal point is still legal */
#define EXPOK 0x200 /* (float) exponent (e+3, etc) still legal */
#define PFXOK 0x100 /* 0x prefix is (still) legal */
#define NZDIGITS 0x200 /* no zero digits detected */
/*
* Conversion types.
*/
#define CT_CHAR 0 /* %c conversion */
#define CT_CCL 1 /* %[...] conversion */
#define CT_STRING 2 /* %s conversion */
#define CT_INT 3 /* %[dioupxX] conversion */
typedef unsigned char u_char;
typedef uint64_t u_quad_t;
static const u_char *__sccl(char *, const u_char *);
static void bcopy_wrapper(const void *src, void *dst, size_t n)
{
memmove(dst, src, n);
}
int
rb_vsscanf(const char *inp, char const *fmt0, va_list ap)
{
int inr;
const u_char *fmt = (const u_char *)fmt0;
int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
char *p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nconversions; /* number of conversions */
int nread; /* number of characters consumed from fp */
int base; /* base argument to conversion function */
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric conversions */
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
inr = strlen(inp);
nassigned = 0;
nconversions = 0;
nread = 0;
base = 0; /* XXX just to keep gcc happy */
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
if (isspace(c)) {
while (inr > 0 && isspace(*inp))
nread++, inr--, inp++;
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
if (inr <= 0)
goto input_failure;
if (*inp != c)
goto match_failure;
inr--, inp++;
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'l':
if (flags & LONG) {
flags &= ~LONG;
flags |= LONGLONG;
} else
flags |= LONG;
goto again;
case 'q':
flags |= LONGLONG; /* not quite */
goto again;
case 'h':
if (flags & SHORT) {
flags &= ~SHORT;
flags |= SHORTSHORT;
} else
flags |= SHORT;
goto again;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
width = width * 10 + c - '0';
goto again;
/*
* Conversions.
*/
case 'd':
c = CT_INT;
base = 10;
break;
case 'i':
c = CT_INT;
base = 0;
break;
case 'o':
c = CT_INT;
flags |= UNSIGNED;
base = 8;
break;
case 'u':
c = CT_INT;
flags |= UNSIGNED;
base = 10;
break;
case 'X':
case 'x':
flags |= PFXOK; /* enable 0x prefixing */
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 'n':
nconversions++;
if (flags & SUPPRESS) /* ??? */
continue;
if (flags & SHORTSHORT)
*va_arg(ap, char *) = nread;
else if (flags & SHORT)
*va_arg(ap, short *) = nread;
else if (flags & LONG)
*va_arg(ap, long *) = nread;
else if (flags & LONGLONG)
*va_arg(ap, long long *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
}
/*
* We have a conversion that requires input.
*/
if (inr <= 0)
goto input_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (isspace(*inp)) {
nread++;
if (--inr > 0)
inp++;
else
goto input_failure;
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* can no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = inr) < (int)width) {
sum += n;
width -= n;
inp += n;
if (sum == 0)
goto input_failure;
break;
} else {
sum += width;
inr -= width;
inp += width;
break;
}
}
nread += sum;
} else {
bcopy_wrapper(inp, va_arg(ap, char *), width);
inr -= width;
inp += width;
nread += width;
nassigned++;
}
nconversions++;
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = (size_t)~0; /* `infinity' */
/* take only those things in the class */
if (flags & SUPPRESS) {
n = 0;
while (ccltab[(unsigned char)*inp]) {
n++, inr--, inp++;
if (--width == 0)
break;
if (inr <= 0) {
if (n == 0)
goto input_failure;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, char *);
while (ccltab[(unsigned char)*inp]) {
inr--;
*p++ = *inp++;
if (--width == 0)
break;
if (inr <= 0) {
if (p == p0)
goto input_failure;
break;
}
}
n = p - p0;
if (n == 0)
goto match_failure;
*p = 0;
nassigned++;
}
nread += n;
nconversions++;
break;
case CT_STRING:
/* like CCL, but zero-length string OK, & no NOSKIP */
if (width == 0)
width = (size_t)~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace(*inp)) {
n++, inr--, inp++;
if (--width == 0)
break;
if (inr <= 0)
break;
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace(*inp)) {
inr--;
*p++ = *inp++;
if (--width == 0)
break;
if (inr <= 0)
break;
}
*p = 0;
nread += p - p0;
nassigned++;
}
nconversions++;
continue;
case CT_INT:
/* scan an integer as if by the conversion function */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = *inp;
/*
* Switch on the character; `goto ok'
* if we accept it as a part of number.
*/
switch (c) {
/*
* The digit 0 is always legal, but is
* special. For %i conversions, if no
* digits (zero or nonzero) have been
* scanned (only signs), we will have
* base==0. In that case, we should set
* it to 8 and enable 0x prefixing.
* Also, if we have not scanned zero digits
* before this, do not turn off prefixing
* (someone else will turn it off if we
* have scanned any nonzero digits).
*/
case '0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
/* 1 through 7 always legal */
case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* digits 8 and 9 ok iff decimal or hex */
case '8': case '9':
base = basefix[base];
if (base <= 8)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* letters ok iff hex */
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
/* no need to fix base here */
if (base <= 10)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* sign ok only as first character */
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto ok;
}
break;
/* x ok iff flag still set & 2nd char */
case 'x': case 'X':
if (flags & PFXOK && p == buf + 1) {
base = 16; /* if %i */
flags &= ~PFXOK;
goto ok;
}
break;
}
/*
* If we got here, c is not a legal character
* for a number. Stop accumulating digits.
*/
break;
ok:
/*
* c is legal: store it and look at the next.
*/
*p++ = c;
if (--inr > 0)
inp++;
else
break; /* end of input */
}
/*
* If we had only a sign, it is no good; push
* back the sign. If the number ends in `x',
* it was [sign] '0' 'x', so push back the x
* and treat it as [sign] '0'.
*/
if (flags & NDIGITS) {
if (p > buf) {
inp--;
inr++;
}
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
inp--;
inr++;
}
if ((flags & SUPPRESS) == 0) {
u_quad_t res;
*p = 0;
if ((flags & UNSIGNED) == 0)
res = strtoq(buf, (char **)NULL, base);
else
res = strtouq(buf, (char **)NULL, base);
if (flags & POINTER)
*va_arg(ap, void **) =
(void *)(uintptr_t)res;
else if (flags & SHORTSHORT)
*va_arg(ap, char *) = res;
else if (flags & SHORT)
*va_arg(ap, short *) = res;
else if (flags & LONG)
*va_arg(ap, long *) = res;
else if (flags & LONGLONG)
*va_arg(ap, long long *) = res;
else
*va_arg(ap, int *) = res;
nassigned++;
}
nread += p - buf;
nconversions++;
break;
}
}
input_failure:
return (nconversions != 0 ? nassigned : -1);
match_failure:
return (nassigned);
}
int
sscanf_wrapper(const char *ibuf, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = rb_vsscanf(ibuf, fmt, ap);
va_end(ap);
return(ret);
}
/*
* Fill in the given table from the scanset at the given format
* (just after `['). Return a pointer to the character past the
* closing `]'. The table has a 1 wherever characters should be
* considered part of the scanset.
*/
static const u_char *
__sccl(char *tab, const u_char *fmt)
{
int c, n, v;
/* first `clear' the whole table */
c = *fmt++; /* first char hat => negated scanset */
if (c == '^') {
v = 1; /* default => accept */
c = *fmt++; /* get new first char */
} else
v = 0; /* default => reject */
/* XXX: Will not work if sizeof(tab*) > sizeof(char) */
(void) memset(tab, v, 256);
if (c == 0)
return (fmt - 1);/* format ended before closing ] */
/*
* Now set the entries corresponding to the actual scanset
* to the opposite of the above.
*
* The first character may be ']' (or '-') without being special;
* the last character may be '-'.
*/
v = 1 - v;
for (;;) {
tab[c] = v; /* take character c */
doswitch:
n = *fmt++; /* and examine the next */
switch (n) {
case 0: /* format ended too soon */
return (fmt - 1);
case '-':
/*
* A scanset of the form
* [01+-]
* is defined as `the digit 0, the digit 1,
* the character +, the character -', but
* the effect of a scanset such as
* [a-zA-Z0-9]
* is implementation defined. The V7 Unix
* scanf treats `a-z' as `the letters a through
* z', but treats `a-a' as `the letter a, the
* character -, and the letter a'.
*
* For compatibility, the `-' is not considerd
* to define a range if the character following
* it is either a close bracket (required by ANSI)
* or is not numerically greater than the character
* we just stored in the table (c).
*/
n = *fmt;
if (n == ']' || n < c) {
c = '-';
break; /* resume the for(;;) */
}
fmt++;
/* fill in the range */
do {
tab[++c] = v;
} while (c < n);
c = n;
/*
* Alas, the V7 Unix scanf also treats formats
* such as [a-c-e] as `the letters a through e'.
* This too is permitted by the standard....
*/
goto doswitch;
break;
case ']': /* end of scanset */
return (fmt);
default: /* just another character */
c = n;
break;
}
}
/* NOTREACHED */
}
/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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 "plugin.h"
/*
* Span the complement of string s2.
*/
size_t
strcspn_wrapper(const char *s1, const char *s2)
{
register const char *p, *spanp;
register char c, sc;
/*
* Stop as soon as we find any character from s2. Note that there
* must be a NUL in s2; it suffices to stop when we find that, too.
*/
for (p = s1;;) {
c = *p++;
spanp = s2;
do {
if ((sc = *spanp++) == c)
return (p - 1 - s1);
} while (sc != 0);
}
/* NOTREACHED */
}
/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1989, 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 "rbcompat.h"
/*
* Span the string s2 (skip characters that are in s2).
*/
size_t
strspn_wrapper(const char *s1, const char *s2)
{
register const char *p = s1, *spanp;
register char c, sc;
/*
* Skip any characters in s2, excluding the terminating \0.
*/
cont:
c = *p++;
for (spanp = s2; (sc = *spanp++) != 0;)
if (sc == c)
goto cont;
return (p - 1 - s1);
}
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