#include "../SDL_internal.h"
#include "SDL_stdinc.h"
#include "../libm/math_libm.h"

Include dependency graph for SDL_stdlib.c:

Functions
double	SDL_atan (double x)
float	SDL_atanf (float x)
double	SDL_atan2 (double x, double y)
float	SDL_atan2f (float x, float y)
double	SDL_acos (double val)
float	SDL_acosf (float val)
double	SDL_asin (double val)
float	SDL_asinf (float val)
double	SDL_ceil (double x)
float	SDL_ceilf (float x)
double	SDL_copysign (double x, double y)
float	SDL_copysignf (float x, float y)
double	SDL_cos (double x)
float	SDL_cosf (float x)
double	SDL_exp (double x)
float	SDL_expf (float x)
double	SDL_fabs (double x)
float	SDL_fabsf (float x)
double	SDL_floor (double x)
float	SDL_floorf (float x)
double	SDL_fmod (double x, double y)
float	SDL_fmodf (float x, float y)
double	SDL_log (double x)
float	SDL_logf (float x)
double	SDL_log10 (double x)
float	SDL_log10f (float x)
double	SDL_pow (double x, double y)
float	SDL_powf (float x, float y)
double	SDL_scalbn (double x, int n)
float	SDL_scalbnf (float x, int n)
double	SDL_sin (double x)
float	SDL_sinf (float x)
double	SDL_sqrt (double x)
float	SDL_sqrtf (float x)
double	SDL_tan (double x)
float	SDL_tanf (float x)
int	SDL_abs (int x)
int	SDL_isdigit (int x)
int	SDL_isspace (int x)
int	SDL_toupper (int x)
int	SDL_tolower (int x)

Function Documentation

int SDL_abs ( int x )

Definition at line 429 of file SDL_stdlib.c.

{
#if defined(HAVE_ABS)
    return abs(x);
#else
    return ((x) < 0 ? -(x) : (x));
#endif
}

double SDL_acos ( double val )

Definition at line 75 of file SDL_stdlib.c.

References SDL_atan, and SDL_sqrt.

{
#if defined(HAVE_ACOS)
    return acos(val);
#else
    double result;
    if (val == -1.0) {
        result = M_PI;
    } else {
        result = SDL_atan(SDL_sqrt(1.0 - val * val) / val);
        if (result < 0.0)
        {
            result += M_PI;
        }
    }
    return result;
#endif
}

float SDL_acosf ( float val )

Definition at line 95 of file SDL_stdlib.c.

References SDL_acos.

{
#if defined(HAVE_ACOSF)
    return acosf(val);
#else
    return (float)SDL_acos((double)val);
#endif
}

double SDL_asin ( double val )

Definition at line 105 of file SDL_stdlib.c.

References SDL_acos.

{
#if defined(HAVE_ASIN)
    return asin(val);
#else
    double result;
    if (val == -1.0) {
        result = -(M_PI / 2.0);
    } else {
        result = (M_PI / 2.0) - SDL_acos(val);
    }
    return result;
#endif
}

float SDL_asinf ( float val )

Definition at line 121 of file SDL_stdlib.c.

References SDL_asin.

{
#if defined(HAVE_ASINF)
    return asinf(val);
#else
    return (float)SDL_asin((double)val);
#endif
}

double SDL_atan ( double x )

Definition at line 35 of file SDL_stdlib.c.

References atan(), and SDL_uclibc_atan().

{
#if defined(HAVE_ATAN)
    return atan(x);
#else
    return SDL_uclibc_atan(x);
#endif
}

double SDL_atan2	(	double	x,
		double	y
	)

Definition at line 55 of file SDL_stdlib.c.

References SDL_uclibc_atan2().

{
#if defined(HAVE_ATAN2)
    return atan2(x, y);
#else
    return SDL_uclibc_atan2(x, y);
#endif
}

float SDL_atan2f	(	float	x,
		float	y
	)

Definition at line 65 of file SDL_stdlib.c.

References SDL_atan2.

{
#if defined(HAVE_ATAN2F)
    return atan2f(x, y);
#else
    return (float)SDL_atan2((double)x, (double)y);
#endif
}

float SDL_atanf ( float x )

Definition at line 45 of file SDL_stdlib.c.

References SDL_atan.

{
#if defined(HAVE_ATANF)
    return atanf(x);
#else
    return (float)SDL_atan((double)x);
#endif
}

double SDL_ceil ( double x )

Definition at line 131 of file SDL_stdlib.c.

References SDL_floor.

{
#if defined(HAVE_CEIL)
    return ceil(x);
#else
    double integer = SDL_floor(x);
    double fraction = x - integer;
    if (fraction > 0.0) {
        integer += 1.0;
    }
    return integer;
#endif /* HAVE_CEIL */
}

float SDL_ceilf ( float x )

Definition at line 146 of file SDL_stdlib.c.

References SDL_ceil.

{
#if defined(HAVE_CEILF)
    return ceilf(x);
#else
    return (float)SDL_ceil((float)x);
#endif
}

double SDL_copysign	(	double	x,
		double	y
	)

Definition at line 156 of file SDL_stdlib.c.

References copysign(), and SDL_uclibc_copysign().

{
#if defined(HAVE_COPYSIGN)
    return copysign(x, y);
#elif defined(HAVE__COPYSIGN)
    return _copysign(x, y);
#elif defined(__WATCOMC__) && defined(__386__)
    /* this is nasty as hell, but it works.. */
    unsigned int *xi = (unsigned int *) &x,
                 *yi = (unsigned int *) &y;
    xi[1] = (yi[1] & 0x80000000) | (xi[1] & 0x7fffffff);
    return x;
#else
    return SDL_uclibc_copysign(x, y);
#endif /* HAVE_COPYSIGN */
}

float SDL_copysignf	(	float	x,
		float	y
	)

Definition at line 174 of file SDL_stdlib.c.

References SDL_copysign.

{
#if defined(HAVE_COPYSIGNF)
    return copysignf(x, y);
#else
    return (float)SDL_copysign((double)x, (double)y);
#endif
}

double SDL_cos ( double x )

Definition at line 184 of file SDL_stdlib.c.

References cos(), and SDL_uclibc_cos().

{
#if defined(HAVE_COS)
    return cos(x);
#else
    return SDL_uclibc_cos(x);
#endif
}

float SDL_cosf ( float x )

Definition at line 194 of file SDL_stdlib.c.

References SDL_cos.

{
#if defined(HAVE_COSF)
    return cosf(x);
#else
    return (float)SDL_cos((double)x);
#endif
}

double SDL_exp ( double x )

Definition at line 204 of file SDL_stdlib.c.

References SDL_uclibc_exp().

{
#if defined(HAVE_EXP)
    return exp(x);
#else
    return SDL_uclibc_exp(x);
#endif
}

float SDL_expf ( float x )

Definition at line 214 of file SDL_stdlib.c.

References SDL_exp.

{
#if defined(HAVE_EXPF)
    return expf(x);
#else
    return (float)SDL_exp((double)x);
#endif
}

double SDL_fabs ( double x )

Definition at line 224 of file SDL_stdlib.c.

References fabs(), and SDL_uclibc_fabs().

{
#if defined(HAVE_FABS)
    return fabs(x);
#else
    return SDL_uclibc_fabs(x);
#endif
}

float SDL_fabsf ( float x )

Definition at line 234 of file SDL_stdlib.c.

References SDL_fabs.

{
#if defined(HAVE_FABSF)
    return fabsf(x);
#else
    return (float)SDL_fabs((double)x);
#endif
}

double SDL_floor ( double x )

Definition at line 244 of file SDL_stdlib.c.

References floor(), and SDL_uclibc_floor().

{
#if defined(HAVE_FLOOR)
    return floor(x);
#else
    return SDL_uclibc_floor(x);
#endif
}

float SDL_floorf ( float x )

Definition at line 254 of file SDL_stdlib.c.

References SDL_floor.

{
#if defined(HAVE_FLOORF)
    return floorf(x);
#else
    return (float)SDL_floor((double)x);
#endif
}

double SDL_fmod	(	double	x,
		double	y
	)

Definition at line 264 of file SDL_stdlib.c.

References SDL_uclibc_fmod().

{
#if defined(HAVE_FMOD)
    return fmod(x, y);
#else
    return SDL_uclibc_fmod(x, y);
#endif
}

float SDL_fmodf	(	float	x,
		float	y
	)

Definition at line 274 of file SDL_stdlib.c.

References SDL_fmod.

{
#if defined(HAVE_FMODF)
    return fmodf(x, y);
#else
    return (float)SDL_fmod((double)x, (double)y);
#endif
}

int SDL_isdigit ( int x )

Definition at line 444 of file SDL_stdlib.c.

{ return ((x) >= '0') && ((x) <= '9'); }

int SDL_isspace ( int x )

Definition at line 445 of file SDL_stdlib.c.

{ return ((x) == ' ') || ((x) == '\t') || ((x) == '\r') || ((x) == '\n') || ((x) == '\f') || ((x) == '\v'); }

double SDL_log ( double x )

Definition at line 284 of file SDL_stdlib.c.

References SDL_uclibc_log().

{
#if defined(HAVE_LOG)
    return log(x);
#else
    return SDL_uclibc_log(x);
#endif
}

double SDL_log10 ( double x )

Definition at line 304 of file SDL_stdlib.c.

References SDL_uclibc_log10().

{
#if defined(HAVE_LOG10)
    return log10(x);
#else
    return SDL_uclibc_log10(x);
#endif
}

float SDL_log10f ( float x )

Definition at line 314 of file SDL_stdlib.c.

References SDL_log10.

{
#if defined(HAVE_LOG10F)
    return log10f(x);
#else
    return (float)SDL_log10((double)x);
#endif
}

float SDL_logf ( float x )

Definition at line 294 of file SDL_stdlib.c.

References SDL_log.

{
#if defined(HAVE_LOGF)
    return logf(x);
#else
    return (float)SDL_log((double)x);
#endif
}

double SDL_pow	(	double	x,
		double	y
	)

Definition at line 324 of file SDL_stdlib.c.

References SDL_uclibc_pow().

{
#if defined(HAVE_POW)
    return pow(x, y);
#else
    return SDL_uclibc_pow(x, y);
#endif
}

float SDL_powf	(	float	x,
		float	y
	)

Definition at line 334 of file SDL_stdlib.c.

References SDL_pow.

{
#if defined(HAVE_POWF)
    return powf(x, y);
#else
    return (float)SDL_pow((double)x, (double)y);
#endif
}

double SDL_scalbn	(	double	x,
		int	n
	)

Definition at line 344 of file SDL_stdlib.c.

References scalbn, and SDL_uclibc_scalbn().

{
#if defined(HAVE_SCALBN)
    return scalbn(x, n);
#elif defined(HAVE__SCALB)
    return _scalb(x, n);
#elif defined(HAVE_LIBC) && defined(HAVE_FLOAT_H) && (FLT_RADIX == 2)
/* from scalbn(3): If FLT_RADIX equals 2 (which is
 * usual), then scalbn() is equivalent to ldexp(3). */
    return ldexp(x, n);
#else
    return SDL_uclibc_scalbn(x, n);
#endif
}

float SDL_scalbnf	(	float	x,
		int	n
	)

Definition at line 360 of file SDL_stdlib.c.

References SDL_scalbn.

{
#if defined(HAVE_SCALBNF)
    return scalbnf(x, n);
#else
    return (float)SDL_scalbn((double)x, n);
#endif
}

double SDL_sin ( double x )

Definition at line 370 of file SDL_stdlib.c.

References SDL_uclibc_sin(), and sin().

{
#if defined(HAVE_SIN)
    return sin(x);
#else
    return SDL_uclibc_sin(x);
#endif
}

float SDL_sinf ( float x )

Definition at line 380 of file SDL_stdlib.c.

References SDL_sin.

{
#if defined(HAVE_SINF)
    return sinf(x);
#else
    return (float)SDL_sin((double)x);
#endif
}

double SDL_sqrt ( double x )

Definition at line 390 of file SDL_stdlib.c.

References SDL_uclibc_sqrt().

{
#if defined(HAVE_SQRT)
    return sqrt(x);
#else
    return SDL_uclibc_sqrt(x);
#endif
}

float SDL_sqrtf ( float x )

Definition at line 400 of file SDL_stdlib.c.

References SDL_sqrt.

{
#if defined(HAVE_SQRTF)
    return sqrtf(x);
#else
    return (float)SDL_sqrt((double)x);
#endif
}

double SDL_tan ( double x )

Definition at line 410 of file SDL_stdlib.c.

References SDL_uclibc_tan(), and tan().

{
#if defined(HAVE_TAN)
    return tan(x);
#else
    return SDL_uclibc_tan(x);
#endif
}

float SDL_tanf ( float x )

Definition at line 420 of file SDL_stdlib.c.

References SDL_tan.

{
#if defined(HAVE_TANF)
    return tanf(x);
#else
    return (float)SDL_tan((double)x);
#endif
}

int SDL_tolower ( int x )

Definition at line 447 of file SDL_stdlib.c.

{ return ((x) >= 'A') && ((x) <= 'Z') ? ('a'+((x)-'A')) : (x); }

int SDL_toupper ( int x )

Definition at line 446 of file SDL_stdlib.c.

{ return ((x) >= 'a') && ((x) <= 'z') ? ('A'+((x)-'a')) : (x); }

Functions

Function Documentation