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package toolbox
import (
"path"
"runtime"
"strings"
)
// CallerInfo return filename, function or file line from the stack
func CallerInfo(callerIndex int) (string, string, int) {
var callerPointer = make([]uintptr, 10) // at least 1 entry needed
runtime.Callers(callerIndex, callerPointer)
callerInfo := runtime.FuncForPC(callerPointer[0])
file, line := callerInfo.FileLine(callerPointer[0])
callerName := callerInfo.Name()
dotPosition := strings.LastIndex(callerName, ".")
return file, callerName[dotPosition+1:], line
}
//CallerDirectory returns directory of caller source code directory
func CallerDirectory(callerIndex int) string {
file, _, _ := CallerInfo(callerIndex)
parent, _ := path.Split(file)
return parent
}
func hasMatch(target string, candidates ...string) bool {
for _, candidate := range candidates {
if strings.HasSuffix(target, candidate) {
return true
}
}
return false
}
//DiscoverCaller returns the first matched caller info
func DiscoverCaller(offset, maxDepth int, ignoreFiles ...string) (string, string, int) {
var callerPointer = make([]uintptr, maxDepth) // at least 1 entry needed
var caller *runtime.Func
var filename string
var line int
for i := offset; i < maxDepth; i++ {
runtime.Callers(i, callerPointer)
caller = runtime.FuncForPC(callerPointer[0])
filename, line = caller.FileLine(callerPointer[0])
if hasMatch(filename, ignoreFiles...) {
continue
}
break
}
callerName := caller.Name()
dotPosition := strings.LastIndex(callerName, ".")
return filename, callerName[dotPosition+1:], line
}
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