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-rw-r--r--src/rapidjson/test/unittest/itoatest.cpp160
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diff --git a/src/rapidjson/test/unittest/itoatest.cpp b/src/rapidjson/test/unittest/itoatest.cpp
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+++ b/src/rapidjson/test/unittest/itoatest.cpp
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+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#include "unittest.h"
+#include "rapidjson/internal/itoa.h"
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(type-limits)
+#endif
+
+using namespace rapidjson::internal;
+
+template <typename T>
+struct Traits {
+};
+
+template <>
+struct Traits<uint32_t> {
+ enum { kBufferSize = 11 };
+ enum { kMaxDigit = 10 };
+ static uint32_t Negate(uint32_t x) { return x; }
+};
+
+template <>
+struct Traits<int32_t> {
+ enum { kBufferSize = 12 };
+ enum { kMaxDigit = 10 };
+ static int32_t Negate(int32_t x) { return -x; }
+};
+
+template <>
+struct Traits<uint64_t> {
+ enum { kBufferSize = 21 };
+ enum { kMaxDigit = 20 };
+ static uint64_t Negate(uint64_t x) { return x; }
+};
+
+template <>
+struct Traits<int64_t> {
+ enum { kBufferSize = 22 };
+ enum { kMaxDigit = 20 };
+ static int64_t Negate(int64_t x) { return -x; }
+};
+
+template <typename T>
+static void VerifyValue(T value, void(*f)(T, char*), char* (*g)(T, char*)) {
+ char buffer1[Traits<T>::kBufferSize];
+ char buffer2[Traits<T>::kBufferSize];
+
+ f(value, buffer1);
+ *g(value, buffer2) = '\0';
+
+
+ EXPECT_STREQ(buffer1, buffer2);
+}
+
+template <typename T>
+static void Verify(void(*f)(T, char*), char* (*g)(T, char*)) {
+ // Boundary cases
+ VerifyValue<T>(0, f, g);
+ VerifyValue<T>(std::numeric_limits<T>::min(), f, g);
+ VerifyValue<T>(std::numeric_limits<T>::max(), f, g);
+
+ // 2^n - 1, 2^n, 10^n - 1, 10^n until overflow
+ for (uint32_t power = 2; power <= 10; power += 8) {
+ T i = 1, last;
+ do {
+ VerifyValue<T>(i - 1, f, g);
+ VerifyValue<T>(i, f, g);
+ if (std::numeric_limits<T>::min() < 0) {
+ VerifyValue<T>(Traits<T>::Negate(i), f, g);
+ VerifyValue<T>(Traits<T>::Negate(i + 1), f, g);
+ }
+ last = i;
+ if (i > static_cast<T>(std::numeric_limits<T>::max() / static_cast<T>(power)))
+ break;
+ i *= power;
+ } while (last < i);
+ }
+}
+
+static void u32toa_naive(uint32_t value, char* buffer) {
+ char temp[10];
+ char *p = temp;
+ do {
+ *p++ = static_cast<char>(char(value % 10) + '0');
+ value /= 10;
+ } while (value > 0);
+
+ do {
+ *buffer++ = *--p;
+ } while (p != temp);
+
+ *buffer = '\0';
+}
+
+static void i32toa_naive(int32_t value, char* buffer) {
+ uint32_t u = static_cast<uint32_t>(value);
+ if (value < 0) {
+ *buffer++ = '-';
+ u = ~u + 1;
+ }
+ u32toa_naive(u, buffer);
+}
+
+static void u64toa_naive(uint64_t value, char* buffer) {
+ char temp[20];
+ char *p = temp;
+ do {
+ *p++ = static_cast<char>(char(value % 10) + '0');
+ value /= 10;
+ } while (value > 0);
+
+ do {
+ *buffer++ = *--p;
+ } while (p != temp);
+
+ *buffer = '\0';
+}
+
+static void i64toa_naive(int64_t value, char* buffer) {
+ uint64_t u = static_cast<uint64_t>(value);
+ if (value < 0) {
+ *buffer++ = '-';
+ u = ~u + 1;
+ }
+ u64toa_naive(u, buffer);
+}
+
+TEST(itoa, u32toa) {
+ Verify(u32toa_naive, u32toa);
+}
+
+TEST(itoa, i32toa) {
+ Verify(i32toa_naive, i32toa);
+}
+
+TEST(itoa, u64toa) {
+ Verify(u64toa_naive, u64toa);
+}
+
+TEST(itoa, i64toa) {
+ Verify(i64toa_naive, i64toa);
+}
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif