remove prototype pathops code

experimental/Intersection/DataTypes.cpp

-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "DataTypes.h"
-
-#include <sys/types.h>
-#include <stdlib.h>
-
-#if USE_EPSILON
-const double PointEpsilon = 0.000001;
-const double SquaredEpsilon = PointEpsilon * PointEpsilon;
-#endif
-
-const int UlpsEpsilon = 16;
-
-_Vector operator-(const _Point& a, const _Point& b) {
-    _Vector v = {a.x - b.x, a.y - b.y};
-    return v;
-}
-
-_Point operator+(const _Point& a, const _Vector& b) {
-    _Point v = {a.x + b.x, a.y + b.y};
-    return v;
-}
-
-// from http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
-union Float_t
-{
-    Float_t(float num = 0.0f) : f(num) {}
-    // Portable extraction of components.
-    bool negative() const { return (i >> 31) != 0; }
-#if 0 // unused
-    int32_t RawMantissa() const { return i & ((1 << 23) - 1); }
-    int32_t RawExponent() const { return (i >> 23) & 0xFF; }
-#endif
-    int32_t i;
-    float f;
-#ifdef SK_DEBUG
-    struct
-    {   // Bitfields for exploration. Do not use in production code.
-        uint32_t mantissa : 23;
-        uint32_t exponent : 8;
-        uint32_t sign : 1;
-    } parts;
-#endif
-};
-
-bool AlmostEqualUlps(float A, float B)
-{
-    Float_t uA(A);
-    Float_t uB(B);
-
-    // Different signs means they do not match.
-    if (uA.negative() != uB.negative())
-    {
-        // Check for equality to make sure +0==-0
-        return A == B;
-    }
-
-    // Find the difference in ULPs.
-    int ulpsDiff = abs(uA.i - uB.i);
-    return ulpsDiff <= UlpsEpsilon;
-}
-
-// FIXME: obsolete, delete
-#if 1
-int UlpsDiff(float A, float B)
-{
-    Float_t uA(A);
-    Float_t uB(B);
-
-    return abs(uA.i - uB.i);
-}
-#endif
-
-#ifdef SK_DEBUG
-void mathematica_ize(char* str, size_t bufferLen) {
-    size_t len = strlen(str);
-    bool num = false;
-    for (size_t idx = 0; idx < len; ++idx) {
-        if (num && str[idx] == 'e') {
-            if (len + 2 >= bufferLen) {
-                return;
-            }
-            memmove(&str[idx + 2], &str[idx + 1], len - idx);
-            str[idx] = '*';
-            str[idx + 1] = '^';
-            ++len;
-        }
-        num = str[idx] >= '0' && str[idx] <= '9';
-    }
-}
-
-bool valid_wind(int wind) {
-    return wind > SK_MinS32 + 0xFFFF && wind < SK_MaxS32 - 0xFFFF;
-}
-
-void winding_printf(int wind) {
-    if (wind == SK_MinS32) {
-        SkDebugf("?");
-    } else {
-        SkDebugf("%d", wind);
-    }
-}
-#endif