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87 lines
1.2 KiB
Markdown
87 lines
1.2 KiB
Markdown
## CRC 函数
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Cyclic redundancy check
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### 1.crc16
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> crc16 函数。
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----------------------------
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#### 原型
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```
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crc16(str) => uint16_t
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crc16(data, size) => uint16_t
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crc16(binary) => uint16_t
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```
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#### 示例
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```
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crc16("hello")
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```
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### 2.crc32
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> crc32 函数。
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----------------------------
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#### 原型
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```
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crc32(str) => uint32_t
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crc32(data, size) => uint32_t
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crc32(binary) => uint32_t
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```
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#### 示例
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```
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crc32("hello")
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```
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### 3.cksum
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> cksum 函数。
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----------------------------
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#### 原型
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```
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cksum(str) => uint16_t
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cksum(data, size) => uint16_t
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cksum(binary) => uint16_t
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```
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#### 示例
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```
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cksum("hello")
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```
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### 4. 更多示例
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```js
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//test string
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assert(crc16("123") == 40116)
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assert(crc32("123") == u32(2286445522))
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assert(cksum("123") == u16(65385))
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//test binary
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a=typed_array_create("i8", 10)
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assert(typed_array_push(a, 1,2,3) == 3)
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print(crc16(a.data, a.size))
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print(crc32(a.data, a.size))
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print(cksum(a.data, a.size))
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unset(a);
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//test binary
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assert(file_write("test.bin", "hello", 5))
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assert(file_exist("test.bin"))
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a = file_read_binary("test.bin")
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assert(crc16(a) == 13501)
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assert(crc32(a) == 907060870)
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assert(cksum(a)==65003)
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assert(file_remove("test.bin"))
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unset(a)
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``` |