stringutil

func CompileLike2Regexp ¶

func CompileLike2Regexp(str string) string

CompileLike2Regexp convert a like `lhs` to a regular expression

func CompilePattern ¶

func CompilePattern(pattern string, escape byte) (patChars, patTypes []byte)

CompilePattern handles escapes and wild cards convert pattern characters and pattern types.

func Copy ¶

func Copy(src string) string

Copy deep copies a string.

func DoMatch ¶

func DoMatch(str string, patChars, patTypes []byte) bool

DoMatch matches the string with patChars and patTypes. The algorithm has linear time complexity. https://research.swtch.com/glob

func IsExactMatch ¶

func IsExactMatch(patTypes []byte) bool

IsExactMatch return true if no wildcard character

func MemoizeStr ¶

func MemoizeStr(l func() string) fmt.Stringer

MemoizeStr returns memoized version of stringFunc.

func RemoveSensitiveInfo ¶

func RemoveSensitiveInfo(sqlStr string) string

func Unquote ¶

func Unquote(s string) (t string, err error)

Unquote interprets s as a single-quoted, double-quoted, or backquoted Go string literal, returning the string value that s quotes. For example: test=`"\"\n"` (hex: 22 5c 22 5c 6e 22) should be converted to `"\n` (hex: 22 0a).

func UnquoteChar ¶

func UnquoteChar(s string, quote byte) (value []byte, tail string, err error)

UnquoteChar decodes the first character or byte in the escaped string or character literal represented by the string s. It returns four values:

1) value, the decoded Unicode code point or byte value; 2) multibyte, a boolean indicating whether the decoded character requires a multibyte UTF-8 representation; 3) tail, the remainder of the string after the character; and 4) an error that will be nil if the character is syntactically valid.

The second argument, quote, specifies the type of literal being parsed and therefore which escaped quote character is permitted. If set to a single quote, it permits the sequence \' and disallows unescaped '. If set to a double quote, it permits \" and disallows unescaped ". If set to zero, it does not permit either escape and allows both quote characters to appear unescaped. Different with strconv.UnquoteChar, it permits unnecessary backslash.