mirror of https://github.com/go-gorm/gorm.git
99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package gorm
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import (
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"bytes"
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"strings"
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"sync"
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)
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// Copied from golint
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var commonInitialisms = []string{"API", "ASCII", "CPU", "CSS", "DNS", "EOF", "GUID", "HTML", "HTTP", "HTTPS", "ID", "IP", "JSON", "LHS", "QPS", "RAM", "RHS", "RPC", "SLA", "SMTP", "SSH", "TLS", "TTL", "UI", "UID", "UUID", "URI", "URL", "UTF8", "VM", "XML", "XSRF", "XSS"}
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var commonInitialismsReplacer *strings.Replacer
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func init() {
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var commonInitialismsForReplacer []string
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for _, initialism := range commonInitialisms {
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commonInitialismsForReplacer = append(commonInitialismsForReplacer, initialism, strings.Title(strings.ToLower(initialism)))
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}
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commonInitialismsReplacer = strings.NewReplacer(commonInitialismsForReplacer...)
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}
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type safeMap struct {
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m map[string]string
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l *sync.RWMutex
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}
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func (s *safeMap) Set(key string, value string) {
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s.l.Lock()
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defer s.l.Unlock()
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s.m[key] = value
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}
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func (s *safeMap) Get(key string) string {
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s.l.RLock()
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defer s.l.RUnlock()
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return s.m[key]
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}
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func newSafeMap() *safeMap {
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return &safeMap{l: new(sync.RWMutex), m: make(map[string]string)}
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}
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var smap = newSafeMap()
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type Case bool
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const (
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lower Case = false
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upper Case = true
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)
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func ToDBName(name string) string {
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if v := smap.Get(name); v != "" {
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return v
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}
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var (
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value = commonInitialismsReplacer.Replace(name)
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buf = bytes.NewBufferString("")
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lastCase, currCase, nextCase Case
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)
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for i, v := range value[:len(value)-1] {
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nextCase = value[i+1] >= 'A' && value[i+1] <= 'Z'
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if i > 0 {
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if currCase == upper {
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if lastCase == upper && nextCase == upper {
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buf.WriteRune(v)
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} else {
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buf.WriteRune('_')
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buf.WriteRune(v)
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}
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} else {
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buf.WriteRune(v)
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}
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} else {
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currCase = upper
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buf.WriteRune(v)
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}
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lastCase = currCase
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currCase = nextCase
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}
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buf.WriteByte(value[len(value)-1])
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s := strings.Replace(strings.ToLower(buf.String()), "__", "_", -1)
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smap.Set(name, s)
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return s
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}
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type expr struct {
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expr string
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args []interface{}
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}
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func Expr(expression string, args ...interface{}) *expr {
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return &expr{expr: expression, args: args}
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}
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