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package gelf
import (
"runtime"
"strings"
)
// getCaller returns the filename and the line info of a function
// further down in the call stack. Passing 0 in as callDepth would
// return info on the function calling getCallerIgnoringLog, 1 the
// parent function, and so on. Any suffixes passed to getCaller are
// path fragments like "/pkg/log/log.go", and functions in the call
// stack from that file are ignored.
func getCaller(callDepth int, suffixesToIgnore ...string) (file string, line int) {
// bump by 1 to ignore the getCaller (this) stackframe
callDepth++
outer:
for {
var ok bool
_, file, line, ok = runtime.Caller(callDepth)
if !ok {
file = "???"
line = 0
break
}
for _, s := range suffixesToIgnore {
if strings.HasSuffix(file, s) {
callDepth++
continue outer
}
}
break
}
return
}
func getCallerIgnoringLogMulti(callDepth int) (string, int) {
// the +1 is to ignore this (getCallerIgnoringLogMulti) frame
return getCaller(callDepth+1, "/pkg/log/log.go", "/pkg/io/multi.go")
}
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