add vendor

vendor/gopkg.in/mgo.v2/txn/debug.go

@@ -0,0 +1,109 @@
+package txn
+
+import (
+	"bytes"
+	"fmt"
+	"sort"
+	"sync/atomic"
+
+	"gopkg.in/mgo.v2/bson"
+)
+
+var (
+	debugEnabled bool
+	logger       log_Logger
+)
+
+type log_Logger interface {
+	Output(calldepth int, s string) error
+}
+
+// Specify the *log.Logger where logged messages should be sent to.
+func SetLogger(l log_Logger) {
+	logger = l
+}
+
+// SetDebug enables or disables debugging.
+func SetDebug(debug bool) {
+	debugEnabled = debug
+}
+
+var ErrChaos = fmt.Errorf("interrupted by chaos")
+
+var debugId uint32
+
+func debugPrefix() string {
+	d := atomic.AddUint32(&debugId, 1) - 1
+	s := make([]byte, 0, 10)
+	for i := uint(0); i < 8; i++ {
+		s = append(s, "abcdefghijklmnop"[(d>>(4*i))&0xf])
+		if d>>(4*(i+1)) == 0 {
+			break
+		}
+	}
+	s = append(s, ')', ' ')
+	return string(s)
+}
+
+func logf(format string, args ...interface{}) {
+	if logger != nil {
+		logger.Output(2, fmt.Sprintf(format, argsForLog(args)...))
+	}
+}
+
+func debugf(format string, args ...interface{}) {
+	if debugEnabled && logger != nil {
+		logger.Output(2, fmt.Sprintf(format, argsForLog(args)...))
+	}
+}
+
+func argsForLog(args []interface{}) []interface{} {
+	for i, arg := range args {
+		switch v := arg.(type) {
+		case bson.ObjectId:
+			args[i] = v.Hex()
+		case []bson.ObjectId:
+			lst := make([]string, len(v))
+			for j, id := range v {
+				lst[j] = id.Hex()
+			}
+			args[i] = lst
+		case map[docKey][]bson.ObjectId:
+			buf := &bytes.Buffer{}
+			var dkeys docKeys
+			for dkey := range v {
+				dkeys = append(dkeys, dkey)
+			}
+			sort.Sort(dkeys)
+			for i, dkey := range dkeys {
+				if i > 0 {
+					buf.WriteByte(' ')
+				}
+				buf.WriteString(fmt.Sprintf("%v: {", dkey))
+				for j, id := range v[dkey] {
+					if j > 0 {
+						buf.WriteByte(' ')
+					}
+					buf.WriteString(id.Hex())
+				}
+				buf.WriteByte('}')
+			}
+			args[i] = buf.String()
+		case map[docKey][]int64:
+			buf := &bytes.Buffer{}
+			var dkeys docKeys
+			for dkey := range v {
+				dkeys = append(dkeys, dkey)
+			}
+			sort.Sort(dkeys)
+			for i, dkey := range dkeys {
+				if i > 0 {
+					buf.WriteByte(' ')
+				}
+				buf.WriteString(fmt.Sprintf("%v: %v", dkey, v[dkey]))
+			}
+			args[i] = buf.String()
+		}
+	}
+	return args
+}