Dtoa for fixed notation.

test/cctest/test-fast-dtoa.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 "fast-dtoa.h"
 #include "gay-shortest.h"
 
 using namespace v8::internal;
 
 static const int kBufferSize = 100;
 
 TEST(FastDtoaVariousDoubles) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
-  int sign;
   int length;
   int point;
   int status;
 
   double min_double = 5e-324;
-  status = FastDtoa(min_double, buffer, &sign, &length, &point);
+  status = FastDtoa(min_double, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("5", buffer.start());
   CHECK_EQ(-323, point);
 
   double max_double = 1.7976931348623157e308;
-  status = FastDtoa(max_double, buffer, &sign, &length, &point);
+  status = FastDtoa(max_double, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("17976931348623157", buffer.start());
   CHECK_EQ(309, point);
 
-  status = FastDtoa(4294967272.0, buffer, &sign, &length, &point);
+  status = FastDtoa(4294967272.0, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("4294967272", buffer.start());
   CHECK_EQ(10, point);
 
-  status = FastDtoa(4.1855804968213567e298, buffer, &sign, &length, &point);
+  status = FastDtoa(4.1855804968213567e298, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("4185580496821357", buffer.start());
   CHECK_EQ(299, point);
 
-  status = FastDtoa(5.5626846462680035e-309, buffer, &sign, &length, &point);
+  status = FastDtoa(5.5626846462680035e-309, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("5562684646268003", buffer.start());
   CHECK_EQ(-308, point);
 
-  status = FastDtoa(2147483648.0, buffer, &sign, &length, &point);
+  status = FastDtoa(2147483648.0, buffer, &length, &point);
   CHECK(status);
-  CHECK_EQ(0, sign);
   CHECK_EQ("2147483648", buffer.start());
   CHECK_EQ(10, point);
 
-  status = FastDtoa(3.5844466002796428e+298, buffer, &sign, &length, &point);
+  status = FastDtoa(3.5844466002796428e+298, buffer, &length, &point);
   if (status) {  // Not all FastDtoa variants manage to compute this number.
     CHECK_EQ("35844466002796428", buffer.start());
-    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 = FastDtoa(v, buffer, &sign, &length, &point);
+  status = FastDtoa(v, buffer, &length, &point);
   if (status) {
-    CHECK_EQ(0, sign);
     CHECK_EQ("22250738585072014", buffer.start());
     CHECK_EQ(-307, point);
   }
 
   uint64_t largest_denormal64 = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF);
   v = Double(largest_denormal64).value();
-  status = FastDtoa(v, buffer, &sign, &length, &point);
+  status = FastDtoa(v, buffer, &length, &point);
   if (status) {
-    CHECK_EQ(0, sign);
     CHECK_EQ("2225073858507201", buffer.start());
     CHECK_EQ(-307, point);
   }
 }
 
 
 TEST(FastDtoaGayShortest) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   bool status;
-  int sign;
   int length;
   int point;
   int succeeded = 0;
   int total = 0;
   bool needed_max_length = false;
 
-  Vector<const GayShortest> precomputed = PrecomputedShortestRepresentations();
+  Vector<const PrecomputedShortest> precomputed =
+      PrecomputedShortestRepresentations();
   for (int i = 0; i < precomputed.length(); ++i) {
-    const GayShortest current_test = precomputed[i];
+    const PrecomputedShortest current_test = precomputed[i];
     total++;
     double v = current_test.v;
-    status = FastDtoa(v, buffer, &sign, &length, &point);
+    status = FastDtoa(v, buffer, &length, &point);
     CHECK_GE(kFastDtoaMaximalLength, length);
     if (!status) continue;
     if (length == kFastDtoaMaximalLength) needed_max_length = true;
     succeeded++;
-    CHECK_EQ(0, sign);  // All precomputed numbers are positive.
     CHECK_EQ(current_test.decimal_point, point);
     CHECK_EQ(current_test.representation, buffer.start());
   }
   CHECK_GT(succeeded*1.0/total, 0.99);
   CHECK(needed_max_length);
 }