74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
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package main
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import (
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"git.xdrm.io/go/aicra/driver"
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"strconv"
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"strings"
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)
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func main() {}
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func Export() driver.Checker { return new(DigestChecker) }
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type DigestChecker struct {
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Length *uint64
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}
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// Match filters the parameter type format "varchar(min, max)"
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func (dck *DigestChecker) Match(name string) bool {
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dck.Length = nil
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/* (1) Check prefix/suffix */
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if len(name) < len("digest(x)") || !strings.HasPrefix(name, "digest(") || name[len(name)-1] != ')' {
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return false
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}
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/* (2) Extract length */
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lengthStr := name[len("digest(") : len(name)-1]
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length, err := strconv.ParseUint(lengthStr, 10, 64)
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if err != nil {
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return false
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}
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dck.Length = &length
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return true
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}
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// Check whether the given value fulfills the condition (min, max)
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func (dck *DigestChecker) Check(value interface{}) bool {
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/* (1) Check if sizes set */
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if dck.Length == nil {
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return false
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}
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/* (2) Check if string */
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strval, ok := value.(string)
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if !ok {
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return false
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}
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length := uint64(len(strval))
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/* (3) Check length */
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if length != *dck.Length {
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return false
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}
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/* (4) Check character set */
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for _, char := range strval {
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if !isValidCharacter(char) {
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return false
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}
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}
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return true
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}
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func isValidCharacter(char rune) bool {
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return (char >= '0' && char <= '9') || (char >= 'a' && char <= 'f')
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}
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