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167 lines
2.2 KiB
Markdown
167 lines
2.2 KiB
Markdown
## 大端小端扩展函数
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### 1.is\_little
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> 判断当前 CPU 是否是小端。
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----------------------------
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#### 原型
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```js
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is_little() => bool
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```
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#### 示例
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```js
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print(is_little());
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```
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### 2.htonl
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> 将类型为 uint32_t 的整数，从主机字节顺序转成网络字节顺序。
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----------------------------
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#### 原型
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```js
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htonl(uint32_t) => uint32_t
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```
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#### 示例
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```js
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print(htonl(1));
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```
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### 3.ntohl
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> 将类型为 uint32_t 的整数，从网络字节顺序转成主机字节顺序。
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----------------------------
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#### 原型
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```js
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ntohl(uint32_t) => uint32_t
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```
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#### 示例
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```js
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print(ntohl(2));
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```
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### 4.htons
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> 将类型为 uint16_t 的整数，从主机字节顺序转成网络字节顺序。
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----------------------------
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#### 原型
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```js
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htons(uint16_t) => uint16_t
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```
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#### 示例
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```js
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print(htons(3));
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```
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### 5.ntohs
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> 将类型为 uint16_t 的整数，从网络字节顺序转成主机字节顺序。
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----------------------------
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#### 原型
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```js
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ntohs(uint16_t) => uint16_t
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```
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#### 示例
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```js
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print(ntohs(4));
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```
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### 6.htonf
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> 将类型为单精度的浮点数，从主机字节顺序转成网络字节顺序。
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----------------------------
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#### 原型
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```js
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htonf(float) => float
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```
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#### 示例
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```js
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print(htonf(5));
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```
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### 7.ntohf
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> 将类型为单精度的浮点数，从网络字节顺序转成主机字节顺序。
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----------------------------
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#### 原型
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```js
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ntohf(float) => float
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```
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#### 示例
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```js
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print(ntohf(7));
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```
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### 8.htonll
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> 将类型为 uint64_t 的整数，从主机字节顺序转成网络字节顺序。
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----------------------------
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#### 原型
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```js
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htonll(uint64_t) => uint64_t
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```
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#### 示例
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```js
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print(htonll(5));
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```
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### 9.ntohll
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> 将类型为 uint64_t 的整数，从网络字节顺序转成主机字节顺序。
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----------------------------
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#### 原型
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```js
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ntohll(uint64_t) => uint64_t
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```
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#### 示例
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```js
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print(ntohll(1));
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```
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### 更多示例
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```js
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assert(is_little())
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assert(htonl(0x11223344) == 0x44332211)
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assert(ntohl(0x11223344) == 0x44332211)
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assert(htons(0x1122) == 0x2211)
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assert(ntohs(0x1122) == 0x2211)
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assert(htonll(0x1122334455667788)==0x8877665544332211)
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assert(ntohll(0x1122334455667788)==0x8877665544332211)
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```
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