runtime: convert symtab.c into symtab.go

Because symtab.c was partially converted before,
the diffs are not terribly useful.

The earlier conversion was trying to refactor or
clean up the code in addition to doing the translation.
It also made a mistake by redefining Func to be something
users could overwrite.

I undid those changes, making symtab.go a more
literal line-for-line translation of symtab.c instead.

LGTM=josharian
R=golang-codereviews, dave, bradfitz, josharian
CC=golang-codereviews, iant, khr, r
https://golang.org/cl/140880043

1 files changed, 0 insertions, 13 deletions

diff --git a/src/pkg/runtime/string.go b/src/pkg/runtime/string.go
index 1cefad9671..91f33db118 100644
--- a/src/pkg/runtime/string.go
+++ b/src/pkg/runtime/string.go
@@ -145,19 +145,6 @@ type stringStruct struct {
 	len int
 }
 
-func cstringToGo(str unsafe.Pointer) (s string) {
-	i := 0
-	for ; ; i++ {
-		if *(*byte)(unsafe.Pointer(uintptr(str) + uintptr(i))) == 0 {
-			break
-		}
-	}
-	t := (*stringStruct)(unsafe.Pointer(&s))
-	t.str = unsafe.Pointer(str)
-	t.len = i
-	return
-}
-
 func intstring(v int64) string {
 	s, b := rawstring(4)
 	n := runetochar(b, rune(v))