diff options
Diffstat (limited to 'gcc-4.8/libgo/go/go/types/exportdata.go')
| -rw-r--r-- | gcc-4.8/libgo/go/go/types/exportdata.go | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/gcc-4.8/libgo/go/go/types/exportdata.go b/gcc-4.8/libgo/go/go/types/exportdata.go deleted file mode 100644 index 1f6a3c725..000000000 --- a/gcc-4.8/libgo/go/go/types/exportdata.go +++ /dev/null @@ -1,111 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// This file implements FindGcExportData. - -package types - -import ( - "bufio" - "errors" - "fmt" - "io" - "strconv" - "strings" -) - -func readGopackHeader(r *bufio.Reader) (name string, size int, err error) { - // See $GOROOT/include/ar.h. - hdr := make([]byte, 16+12+6+6+8+10+2) - _, err = io.ReadFull(r, hdr) - if err != nil { - return - } - // leave for debugging - if false { - fmt.Printf("header: %s", hdr) - } - s := strings.TrimSpace(string(hdr[16+12+6+6+8:][:10])) - size, err = strconv.Atoi(s) - if err != nil || hdr[len(hdr)-2] != '`' || hdr[len(hdr)-1] != '\n' { - err = errors.New("invalid archive header") - return - } - name = strings.TrimSpace(string(hdr[:16])) - return -} - -// FindGcExportData positions the reader r at the beginning of the -// export data section of an underlying GC-created object/archive -// file by reading from it. The reader must be positioned at the -// start of the file before calling this function. -// -func FindGcExportData(r *bufio.Reader) (err error) { - // Read first line to make sure this is an object file. - line, err := r.ReadSlice('\n') - if err != nil { - return - } - if string(line) == "!<arch>\n" { - // Archive file. Scan to __.PKGDEF, which should - // be second archive entry. - 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 - } - if _, err = io.ReadFull(r, tmp[:n]); err != nil { - return - } - size -= n - } - - // Second entry should be __.PKGDEF. - if name, size, err = readGopackHeader(r); err != nil { - return - } - if name != "__.PKGDEF" { - err = errors.New("go archive is missing __.PKGDEF") - return - } - - // Read first line of __.PKGDEF data, so that line - // is once again the first line of the input. - if line, err = r.ReadSlice('\n'); err != nil { - return - } - } - - // Now at __.PKGDEF in archive or still at beginning of file. - // Either way, line should begin with "go object ". - if !strings.HasPrefix(string(line), "go object ") { - err = errors.New("not a go object file") - return - } - - // Skip over object header to export data. - // Begins after first line with $$. - for line[0] != '$' { - if line, err = r.ReadSlice('\n'); err != nil { - return - } - } - - return -} |