ceph/src/rapidjson/test/unittest/dtoatest.cpp

   1 // Tencent is pleased to support the open source community by making RapidJSON available.
   2 //
   3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
   4 //
   5 // Licensed under the MIT License (the "License"); you may not use this file except
   6 // in compliance with the License. You may obtain a copy of the License at
   7 //
   8 // http://opensource.org/licenses/MIT
   9 //
  10 // Unless required by applicable law or agreed to in writing, software distributed
  11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
  13 // specific language governing permissions and limitations under the License.
  14
  15 #include "unittest.h"
  16 #include "rapidjson/internal/dtoa.h"
  17
  18 #ifdef __GNUC__
  19 RAPIDJSON_DIAG_PUSH
  20 RAPIDJSON_DIAG_OFF(type-limits)
  21 #endif
  22
  23 using namespace rapidjson::internal;
  24
  25 TEST(dtoa, normal) {
  26     char buffer[30];
  27
  28 #define TEST_DTOA(d, a)\
  29     *dtoa(d, buffer) = '\0';\
  30     EXPECT_STREQ(a, buffer)
  31
  32     TEST_DTOA(0.0, "0.0");
  33     TEST_DTOA(-0.0, "-0.0");
  34     TEST_DTOA(1.0, "1.0");
  35     TEST_DTOA(-1.0, "-1.0");
  36     TEST_DTOA(1.2345, "1.2345");
  37     TEST_DTOA(1.2345678, "1.2345678");
  38     TEST_DTOA(0.123456789012, "0.123456789012");
  39     TEST_DTOA(1234567.8, "1234567.8");
  40     TEST_DTOA(-79.39773355813419, "-79.39773355813419");
  41     TEST_DTOA(0.000001, "0.000001");
  42     TEST_DTOA(0.0000001, "1e-7");
  43     TEST_DTOA(1e30, "1e30");
  44     TEST_DTOA(1.234567890123456e30, "1.234567890123456e30");
  45     TEST_DTOA(5e-324, "5e-324"); // Min subnormal positive double
  46     TEST_DTOA(2.225073858507201e-308, "2.225073858507201e-308"); // Max subnormal positive double
  47     TEST_DTOA(2.2250738585072014e-308, "2.2250738585072014e-308"); // Min normal positive double
  48     TEST_DTOA(1.7976931348623157e308, "1.7976931348623157e308"); // Max double
  49
  50 #undef TEST_DTOA
  51 }
  52
  53 TEST(dtoa, maxDecimalPlaces) {
  54     char buffer[30];
  55
  56 #define TEST_DTOA(m, d, a)\
  57     *dtoa(d, buffer, m) = '\0';\
  58     EXPECT_STREQ(a, buffer)
  59
  60     TEST_DTOA(3, 0.0, "0.0");
  61     TEST_DTOA(1, 0.0, "0.0");
  62     TEST_DTOA(3, -0.0, "-0.0");
  63     TEST_DTOA(3, 1.0, "1.0");
  64     TEST_DTOA(3, -1.0, "-1.0");
  65     TEST_DTOA(3, 1.2345, "1.234");
  66     TEST_DTOA(2, 1.2345, "1.23");
  67     TEST_DTOA(1, 1.2345, "1.2");
  68     TEST_DTOA(3, 1.2345678, "1.234");
  69     TEST_DTOA(3, 1.0001, "1.0");
  70     TEST_DTOA(2, 1.0001, "1.0");
  71     TEST_DTOA(1, 1.0001, "1.0");
  72     TEST_DTOA(3, 0.123456789012, "0.123");
  73     TEST_DTOA(2, 0.123456789012, "0.12");
  74     TEST_DTOA(1, 0.123456789012, "0.1");
  75     TEST_DTOA(4, 0.0001, "0.0001");
  76     TEST_DTOA(3, 0.0001, "0.0");
  77     TEST_DTOA(2, 0.0001, "0.0");
  78     TEST_DTOA(1, 0.0001, "0.0");
  79     TEST_DTOA(3, 1234567.8, "1234567.8");
  80     TEST_DTOA(3, 1e30, "1e30");
  81     TEST_DTOA(3, 5e-324, "0.0"); // Min subnormal positive double
  82     TEST_DTOA(3, 2.225073858507201e-308, "0.0"); // Max subnormal positive double
  83     TEST_DTOA(3, 2.2250738585072014e-308, "0.0"); // Min normal positive double
  84     TEST_DTOA(3, 1.7976931348623157e308, "1.7976931348623157e308"); // Max double
  85     TEST_DTOA(5, -0.14000000000000001, "-0.14");
  86     TEST_DTOA(4, -0.14000000000000001, "-0.14");
  87     TEST_DTOA(3, -0.14000000000000001, "-0.14");
  88     TEST_DTOA(3, -0.10000000000000001, "-0.1");
  89     TEST_DTOA(2, -0.10000000000000001, "-0.1");
  90     TEST_DTOA(1, -0.10000000000000001, "-0.1");
  91
  92 #undef TEST_DTOA
  93 }
  94
  95
  96 #ifdef __GNUC__
  97 RAPIDJSON_DIAG_POP
  98 #endif