Revert grisu commits.

test/cctest/test-grisu3.cc

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
-
-#include <stdlib.h>
-
-#include "v8.h"
-
-#include "platform.h"
-#include "cctest.h"
-#include "diy_fp.h"
-#include "double.h"
-#include "grisu3.h"
-
-#include "test-dtoa.h"
-
-using namespace v8::internal;
-
-TEST(DoubleExtremes) {
-  char buffer[kBufferSize];
-  int length;
-  int sign;
-  int point;
-  bool status;
-  double min_double = 5e-324;
-  status = grisu3(min_double, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("5", buffer);
-  CHECK_EQ(-323, point);
-
-  double max_double = 1.7976931348623157e308;
-  status = grisu3(max_double, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("17976931348623157", buffer);
-  CHECK_EQ(309, point);
-}
-
-
-TEST(DoubleTestFunctions) {
-  char buffer[kBufferSize];
-
-  strncpy(buffer, "12345", kBufferSize);
-  CHECK(IsCorrect(123.45, buffer, 0, 5, 3));
-  strncpy(buffer, "12345", kBufferSize);
-  CHECK(IsCorrect(1.2345, buffer, 0, 5, 1));
-  strncpy(buffer, "12345", kBufferSize);
-  CHECK(!IsCorrect(1.2344, buffer, 0, 5, 1));
-  strncpy(buffer, "12345", kBufferSize);
-  CHECK(!IsCorrect(1.2345, buffer, 0, 5, 2));
-  strncpy(buffer, "12345", kBufferSize);
-  CHECK(!IsCorrect(1.2345, buffer, 0, 4, 1));
-
-  strncpy(buffer, "1234", kBufferSize);
-  CHECK(IsRounded(123.44, buffer, 0, 4, 3));
-  strncpy(buffer, "1234", kBufferSize);
-  CHECK(!IsRounded(123.4500000000001, buffer, 0, 4, 3));
-  strncpy(buffer, "1234", kBufferSize);
-  CHECK(IsRounded(123.44999999, buffer, 0, 4, 3));
-  strncpy(buffer, "1234", kBufferSize);
-  CHECK(IsRounded(123.44999999, buffer, 0, 3, 3));
-
-  strncpy(buffer, "1234567000000000000000000001", kBufferSize);
-  CHECK(IsShortest(123.45, buffer, 0, 5, 3));
-  strncpy(buffer, "1234567000000000000000000001", kBufferSize);
-  CHECK(IsShortest(123.4567, buffer, 0, 7, 3));
-  strncpy(buffer, "1234567000000000000000000001", kBufferSize);
-  CHECK(!IsShortest(123.4567, buffer, 0, strlen(buffer), 3));
-
-  strncpy(buffer, "123456699999999999999999999999999999", kBufferSize);
-  CHECK(!IsShortest(123.4567, buffer, 0, strlen(buffer), 3));
-  strncpy(buffer, "123456699999999999999999999999999999", kBufferSize);
-  CHECK(IsShortest(123.456, buffer, 0, 6, 3));
-}
-
-
-TEST(VariousDoubles) {
-  char buffer[kBufferSize];
-  int sign;
-  int length;
-  int point;
-  int status;
-  status = grisu3(4294967272.0, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("4294967272", buffer);
-  CHECK_EQ(10, point);
-
-  status = grisu3(4.1855804968213567e298, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("4185580496821357", buffer);
-  CHECK_EQ(299, point);
-
-  status = grisu3(5.5626846462680035e-309, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("5562684646268003", buffer);
-  CHECK_EQ(-308, point);
-
-  status = grisu3(2147483648.0, buffer, &sign, &length, &point);
-  CHECK(status);
-  CHECK_EQ(0, sign);
-  CHECK_EQ("2147483648", buffer);
-  CHECK_EQ(10, point);
-
-  status = grisu3(3.5844466002796428e+298, buffer, &sign, &length, &point);
-  if (status) {  // Not all grisu3 variants manage to compute this number.
-    CHECK_EQ("35844466002796428", buffer);
-    CHECK_EQ(0, sign);
-    CHECK_EQ(299, point);
-  }
-
-  uint64_t smallest_normal64 = V8_2PART_UINT64_C(0x00100000, 00000000);
-  double v = Double(smallest_normal64).value();
-  status = grisu3(v, buffer, &sign, &length, &point);
-  if (status) {
-    CHECK_EQ(0, sign);
-    CHECK(IsCorrect(v, buffer, 0, length, point));
-    CHECK(IsRounded(v, buffer, 0, length, point));
-    CHECK(IsShortest(v, buffer, 0, length, point));
-  }
-
-  uint64_t largest_denormal64 = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF);
-  v = Double(largest_denormal64).value();
-  status = grisu3(v, buffer, &sign, &length, &point);
-  if (status) {
-    CHECK_EQ(0, sign);
-    CHECK(IsCorrect(v, buffer, 0, length, point));
-    CHECK(IsRounded(v, buffer, 0, length, point));
-    CHECK(IsShortest(v, buffer, 0, length, point));
-  }
-}
-
-
-static double random_double() {
-  uint64_t double64 = 0;
-  for (int i = 0; i < 8; i++) {
-    double64 <<= 8;
-    double64 += rand() % 256;  // NOLINT
-  }
-  return Double(double64).value();
-}
-
-
-TEST(RandomDoubles) {
-  // For a more thorough testing increase the iteration count.
-  // We also check kGrisu3MaximalLength in here.
-  const int kIterationCount = 100000;
-  int succeeded = 0;
-  int total = 0;
-  char buffer[kBufferSize];
-  int length;
-  int sign;
-  int point;
-  bool needed_max_length = false;
-
-  for (int i = 0; i < kIterationCount; ++i) {
-    double v = random_double();
-    if (v != v) continue;  // NaN
-    if (v == 0.0) continue;
-    if (v < 0) v = -v;
-    total++;
-    int status = grisu3(v, buffer, &sign, &length, &point);
-    CHECK_GE(kGrisu3MaximalLength, length);
-    if (length == kGrisu3MaximalLength) needed_max_length = true;
-    if (!status) continue;
-    succeeded++;
-    CHECK(IsCorrect(v, buffer, 0, length, point));
-    CHECK(IsRounded(v, buffer, 0, length, point));
-    CHECK(IsShortest(v, buffer, 0, length, point));
-  }
-  CHECK_GT(succeeded*1.0/total, 0.99);
-  CHECK(needed_max_length);
-}