/usr/include/poppler/splash/SplashMath.h is in libpoppler-dev 0.18.4-1ubuntu3.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// SplashMath.h
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2009-2011 Albert Astals Cid <aacid@kde.org>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#ifndef SPLASHMATH_H
#define SPLASHMATH_H
#include "poppler/poppler-config.h"
#if USE_FIXEDPOINT
#include "goo/FixedPoint.h"
#else
#include <math.h>
#endif
#include "SplashTypes.h"
static inline SplashCoord splashAbs(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::abs(x);
#elif USE_FLOAT
return fabsf(x);
#else
return fabs(x);
#endif
}
static inline int splashFloor(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::floor(x);
#elif USE_FLOAT
return (int)floorf(x);
#else
if (x > 0) return (int)x;
else return (int)floor(x);
#endif
}
static inline int splashCeil(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::ceil(x);
#elif USE_FLOAT
return (int)ceilf(x);
#else
return (int)ceil(x);
#endif
}
static inline int splashRound(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::round(x);
#else
return (int)splashFloor(x + 0.5);
#endif
}
static inline SplashCoord splashSqrt(SplashCoord x) {
#if USE_FIXEDPOINT
return FixedPoint::sqrt(x);
#elif USE_FLOAT
return sqrtf(x);
#else
return sqrt(x);
#endif
}
static inline SplashCoord splashPow(SplashCoord x, SplashCoord y) {
#if USE_FIXEDPOINT
return FixedPoint::pow(x, y);
#elif USE_FLOAT
return powf(x, y);
#else
return pow(x, y);
#endif
}
static inline SplashCoord splashDist(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1) {
SplashCoord dx, dy;
dx = x1 - x0;
dy = y1 - y0;
#if USE_FIXEDPOINT
// this handles the situation where dx*dx or dy*dy is too large to
// fit in the 16.16 fixed point format
SplashCoord dxa, dya;
dxa = splashAbs(dx);
dya = splashAbs(dy);
if (dxa == 0 && dya == 0) {
return 0;
} else if (dxa > dya) {
return dxa * FixedPoint::sqrt(dya / dxa + 1);
} else {
return dya * FixedPoint::sqrt(dxa / dya + 1);
}
#else
return splashSqrt(dx * dx + dy * dy);
#endif
}
#endif
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