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go.tools/go/gcimporter: adjust for new .a file format

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R=rsc, r
CC=golang-dev
https://golang.org/cl/41510044
This commit is contained in:
Robert Griesemer 2013-12-18 10:53:59 -08:00
parent b6e674b8e7
commit 4e3127283a
1 changed files with 19 additions and 22 deletions
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41
go/gcimporter/exportdata.go
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@ -48,38 +48,35 @@ func FindExportData(r *bufio.Reader) (err error) {
return
}
if string(line) == "!<arch>\n" {
// Archive file. Scan to __.PKGDEF, which should
// be second archive entry.
// Archive file. Scan to __.PKGDEF.
var name string
var size int
// First entry should be __.GOSYMDEF.
// Older archives used __.SYMDEF, so allow that too.
// Read and discard.
if name, size, err = readGopackHeader(r); err != nil {
return
}
if name != "__.SYMDEF" && name != "__.GOSYMDEF" {
err = errors.New("go archive does not begin with __.SYMDEF or __.GOSYMDEF")
return
}
const block = 4096
tmp := make([]byte, block)
for size > 0 {
n := size
if n > block {
n = block
// Optional leading __.GOSYMDEF or __.SYMDEF.
// Read and discard.
if name == "__.SYMDEF" || name == "__.GOSYMDEF" {
const block = 4096
tmp := make([]byte, block)
for size > 0 {
n := size
if n > block {
n = block
}
if _, err = io.ReadFull(r, tmp[:n]); err != nil {
return
}
size -= n
}
if _, err = io.ReadFull(r, tmp[:n]); err != nil {
if name, size, err = readGopackHeader(r); err != nil {
return
}
size -= n
}
// Second entry should be __.PKGDEF.
if name, size, err = readGopackHeader(r); err != nil {
return
}
// First real entry should be __.PKGDEF.
if name != "__.PKGDEF" {
err = errors.New("go archive is missing __.PKGDEF")
return