Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 238 deletions

diff --git a/src/pkg/go/build/read.go b/src/pkg/go/build/read.go
deleted file mode 100644
index c8079dfd1..000000000
--- a/src/pkg/go/build/read.go
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2012 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.
-
-package build
-
-import (
-	"bufio"
-	"errors"
-	"io"
-)
-
-type importReader struct {
-	b    *bufio.Reader
-	buf  []byte
-	peek byte
-	err  error
-	eof  bool
-	nerr int
-}
-
-func isIdent(c byte) bool {
-	return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '_' || c >= 0x80
-}
-
-var (
-	errSyntax = errors.New("syntax error")
-	errNUL    = errors.New("unexpected NUL in input")
-)
-
-// syntaxError records a syntax error, but only if an I/O error has not already been recorded.
-func (r *importReader) syntaxError() {
-	if r.err == nil {
-		r.err = errSyntax
-	}
-}
-
-// readByte reads the next byte from the input, saves it in buf, and returns it.
-// If an error occurs, readByte records the error in r.err and returns 0.
-func (r *importReader) readByte() byte {
-	c, err := r.b.ReadByte()
-	if err == nil {
-		r.buf = append(r.buf, c)
-		if c == 0 {
-			err = errNUL
-		}
-	}
-	if err != nil {
-		if err == io.EOF {
-			r.eof = true
-		} else if r.err == nil {
-			r.err = err
-		}
-		c = 0
-	}
-	return c
-}
-
-// peekByte returns the next byte from the input reader but does not advance beyond it.
-// If skipSpace is set, peekByte skips leading spaces and comments.
-func (r *importReader) peekByte(skipSpace bool) byte {
-	if r.err != nil {
-		if r.nerr++; r.nerr > 10000 {
-			panic("go/build: import reader looping")
-		}
-		return 0
-	}
-
-	// Use r.peek as first input byte.
-	// Don't just return r.peek here: it might have been left by peekByte(false)
-	// and this might be peekByte(true).
-	c := r.peek
-	if c == 0 {
-		c = r.readByte()
-	}
-	for r.err == nil && !r.eof {
-		if skipSpace {
-			// For the purposes of this reader, semicolons are never necessary to
-			// understand the input and are treated as spaces.
-			switch c {
-			case ' ', '\f', '\t', '\r', '\n', ';':
-				c = r.readByte()
-				continue
-
-			case '/':
-				c = r.readByte()
-				if c == '/' {
-					for c != '\n' && r.err == nil && !r.eof {
-						c = r.readByte()
-					}
-				} else if c == '*' {
-					var c1 byte
-					for (c != '*' || c1 != '/') && r.err == nil {
-						if r.eof {
-							r.syntaxError()
-						}
-						c, c1 = c1, r.readByte()
-					}
-				} else {
-					r.syntaxError()
-				}
-				c = r.readByte()
-				continue
-			}
-		}
-		break
-	}
-	r.peek = c
-	return r.peek
-}
-
-// nextByte is like peekByte but advances beyond the returned byte.
-func (r *importReader) nextByte(skipSpace bool) byte {
-	c := r.peekByte(skipSpace)
-	r.peek = 0
-	return c
-}
-
-// readKeyword reads the given keyword from the input.
-// If the keyword is not present, readKeyword records a syntax error.
-func (r *importReader) readKeyword(kw string) {
-	r.peekByte(true)
-	for i := 0; i < len(kw); i++ {
-		if r.nextByte(false) != kw[i] {
-			r.syntaxError()
-			return
-		}
-	}
-	if isIdent(r.peekByte(false)) {
-		r.syntaxError()
-	}
-}
-
-// readIdent reads an identifier from the input.
-// If an identifier is not present, readIdent records a syntax error.
-func (r *importReader) readIdent() {
-	c := r.peekByte(true)
-	if !isIdent(c) {
-		r.syntaxError()
-		return
-	}
-	for isIdent(r.peekByte(false)) {
-		r.peek = 0
-	}
-}
-
-// readString reads a quoted string literal from the input.
-// If an identifier is not present, readString records a syntax error.
-func (r *importReader) readString() {
-	switch r.nextByte(true) {
-	case '`':
-		for r.err == nil {
-			if r.nextByte(false) == '`' {
-				break
-			}
-			if r.eof {
-				r.syntaxError()
-			}
-		}
-	case '"':
-		for r.err == nil {
-			c := r.nextByte(false)
-			if c == '"' {
-				break
-			}
-			if r.eof || c == '\n' {
-				r.syntaxError()
-			}
-			if c == '\\' {
-				r.nextByte(false)
-			}
-		}
-	default:
-		r.syntaxError()
-	}
-}
-
-// readImport reads an import clause - optional identifier followed by quoted string -
-// from the input.
-func (r *importReader) readImport() {
-	c := r.peekByte(true)
-	if c == '.' {
-		r.peek = 0
-	} else if isIdent(c) {
-		r.readIdent()
-	}
-	r.readString()
-}
-
-// readComments is like ioutil.ReadAll, except that it only reads the leading
-// block of comments in the file.
-func readComments(f io.Reader) ([]byte, error) {
-	r := &importReader{b: bufio.NewReader(f)}
-	r.peekByte(true)
-	if r.err == nil && !r.eof {
-		// Didn't reach EOF, so must have found a non-space byte. Remove it.
-		r.buf = r.buf[:len(r.buf)-1]
-	}
-	return r.buf, r.err
-}
-
-// readImports is like ioutil.ReadAll, except that it expects a Go file as input
-// and stops reading the input once the imports have completed.
-func readImports(f io.Reader, reportSyntaxError bool) ([]byte, error) {
-	r := &importReader{b: bufio.NewReader(f)}
-
-	r.readKeyword("package")
-	r.readIdent()
-	for r.peekByte(true) == 'i' {
-		r.readKeyword("import")
-		if r.peekByte(true) == '(' {
-			r.nextByte(false)
-			for r.peekByte(true) != ')' && r.err == nil {
-				r.readImport()
-			}
-			r.nextByte(false)
-		} else {
-			r.readImport()
-		}
-	}
-
-	// If we stopped successfully before EOF, we read a byte that told us we were done.
-	// Return all but that last byte, which would cause a syntax error if we let it through.
-	if r.err == nil && !r.eof {
-		return r.buf[:len(r.buf)-1], nil
-	}
-
-	// If we stopped for a syntax error, consume the whole file so that
-	// we are sure we don't change the errors that go/parser returns.
-	if r.err == errSyntax && !reportSyntaxError {
-		r.err = nil
-		for r.err == nil && !r.eof {
-			r.readByte()
-		}
-	}
-
-	return r.buf, r.err
-}