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path: root/vendor/golang.org/x/text/internal/gen/code.go
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Diffstat (limited to 'vendor/golang.org/x/text/internal/gen/code.go')
-rw-r--r--vendor/golang.org/x/text/internal/gen/code.go369
1 files changed, 0 insertions, 369 deletions
diff --git a/vendor/golang.org/x/text/internal/gen/code.go b/vendor/golang.org/x/text/internal/gen/code.go
deleted file mode 100644
index 0389509..0000000
--- a/vendor/golang.org/x/text/internal/gen/code.go
+++ /dev/null
@@ -1,369 +0,0 @@
-// Copyright 2015 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 gen
-
-import (
- "bytes"
- "encoding/gob"
- "fmt"
- "hash"
- "hash/fnv"
- "io"
- "log"
- "os"
- "reflect"
- "strings"
- "unicode"
- "unicode/utf8"
-)
-
-// This file contains utilities for generating code.
-
-// TODO: other write methods like:
-// - slices, maps, types, etc.
-
-// CodeWriter is a utility for writing structured code. It computes the content
-// hash and size of written content. It ensures there are newlines between
-// written code blocks.
-type CodeWriter struct {
- buf bytes.Buffer
- Size int
- Hash hash.Hash32 // content hash
- gob *gob.Encoder
- // For comments we skip the usual one-line separator if they are followed by
- // a code block.
- skipSep bool
-}
-
-func (w *CodeWriter) Write(p []byte) (n int, err error) {
- return w.buf.Write(p)
-}
-
-// NewCodeWriter returns a new CodeWriter.
-func NewCodeWriter() *CodeWriter {
- h := fnv.New32()
- return &CodeWriter{Hash: h, gob: gob.NewEncoder(h)}
-}
-
-// WriteGoFile appends the buffer with the total size of all created structures
-// and writes it as a Go file to the the given file with the given package name.
-func (w *CodeWriter) WriteGoFile(filename, pkg string) {
- f, err := os.Create(filename)
- if err != nil {
- log.Fatalf("Could not create file %s: %v", filename, err)
- }
- defer f.Close()
- if _, err = w.WriteGo(f, pkg, ""); err != nil {
- log.Fatalf("Error writing file %s: %v", filename, err)
- }
-}
-
-// WriteVersionedGoFile appends the buffer with the total size of all created
-// structures and writes it as a Go file to the the given file with the given
-// package name and build tags for the current Unicode version,
-func (w *CodeWriter) WriteVersionedGoFile(filename, pkg string) {
- tags := buildTags()
- if tags != "" {
- filename = insertVersion(filename, UnicodeVersion())
- }
- f, err := os.Create(filename)
- if err != nil {
- log.Fatalf("Could not create file %s: %v", filename, err)
- }
- defer f.Close()
- if _, err = w.WriteGo(f, pkg, tags); err != nil {
- log.Fatalf("Error writing file %s: %v", filename, err)
- }
-}
-
-// WriteGo appends the buffer with the total size of all created structures and
-// writes it as a Go file to the the given writer with the given package name.
-func (w *CodeWriter) WriteGo(out io.Writer, pkg, tags string) (n int, err error) {
- sz := w.Size
- w.WriteComment("Total table size %d bytes (%dKiB); checksum: %X\n", sz, sz/1024, w.Hash.Sum32())
- defer w.buf.Reset()
- return WriteGo(out, pkg, tags, w.buf.Bytes())
-}
-
-func (w *CodeWriter) printf(f string, x ...interface{}) {
- fmt.Fprintf(w, f, x...)
-}
-
-func (w *CodeWriter) insertSep() {
- if w.skipSep {
- w.skipSep = false
- return
- }
- // Use at least two newlines to ensure a blank space between the previous
- // block. WriteGoFile will remove extraneous newlines.
- w.printf("\n\n")
-}
-
-// WriteComment writes a comment block. All line starts are prefixed with "//".
-// Initial empty lines are gobbled. The indentation for the first line is
-// stripped from consecutive lines.
-func (w *CodeWriter) WriteComment(comment string, args ...interface{}) {
- s := fmt.Sprintf(comment, args...)
- s = strings.Trim(s, "\n")
-
- // Use at least two newlines to ensure a blank space between the previous
- // block. WriteGoFile will remove extraneous newlines.
- w.printf("\n\n// ")
- w.skipSep = true
-
- // strip first indent level.
- sep := "\n"
- for ; len(s) > 0 && (s[0] == '\t' || s[0] == ' '); s = s[1:] {
- sep += s[:1]
- }
-
- strings.NewReplacer(sep, "\n// ", "\n", "\n// ").WriteString(w, s)
-
- w.printf("\n")
-}
-
-func (w *CodeWriter) writeSizeInfo(size int) {
- w.printf("// Size: %d bytes\n", size)
-}
-
-// WriteConst writes a constant of the given name and value.
-func (w *CodeWriter) WriteConst(name string, x interface{}) {
- w.insertSep()
- v := reflect.ValueOf(x)
-
- switch v.Type().Kind() {
- case reflect.String:
- w.printf("const %s %s = ", name, typeName(x))
- w.WriteString(v.String())
- w.printf("\n")
- default:
- w.printf("const %s = %#v\n", name, x)
- }
-}
-
-// WriteVar writes a variable of the given name and value.
-func (w *CodeWriter) WriteVar(name string, x interface{}) {
- w.insertSep()
- v := reflect.ValueOf(x)
- oldSize := w.Size
- sz := int(v.Type().Size())
- w.Size += sz
-
- switch v.Type().Kind() {
- case reflect.String:
- w.printf("var %s %s = ", name, typeName(x))
- w.WriteString(v.String())
- case reflect.Struct:
- w.gob.Encode(x)
- fallthrough
- case reflect.Slice, reflect.Array:
- w.printf("var %s = ", name)
- w.writeValue(v)
- w.writeSizeInfo(w.Size - oldSize)
- default:
- w.printf("var %s %s = ", name, typeName(x))
- w.gob.Encode(x)
- w.writeValue(v)
- w.writeSizeInfo(w.Size - oldSize)
- }
- w.printf("\n")
-}
-
-func (w *CodeWriter) writeValue(v reflect.Value) {
- x := v.Interface()
- switch v.Kind() {
- case reflect.String:
- w.WriteString(v.String())
- case reflect.Array:
- // Don't double count: callers of WriteArray count on the size being
- // added, so we need to discount it here.
- w.Size -= int(v.Type().Size())
- w.writeSlice(x, true)
- case reflect.Slice:
- w.writeSlice(x, false)
- case reflect.Struct:
- w.printf("%s{\n", typeName(v.Interface()))
- t := v.Type()
- for i := 0; i < v.NumField(); i++ {
- w.printf("%s: ", t.Field(i).Name)
- w.writeValue(v.Field(i))
- w.printf(",\n")
- }
- w.printf("}")
- default:
- w.printf("%#v", x)
- }
-}
-
-// WriteString writes a string literal.
-func (w *CodeWriter) WriteString(s string) {
- s = strings.Replace(s, `\`, `\\`, -1)
- io.WriteString(w.Hash, s) // content hash
- w.Size += len(s)
-
- const maxInline = 40
- if len(s) <= maxInline {
- w.printf("%q", s)
- return
- }
-
- // We will render the string as a multi-line string.
- const maxWidth = 80 - 4 - len(`"`) - len(`" +`)
-
- // When starting on its own line, go fmt indents line 2+ an extra level.
- n, max := maxWidth, maxWidth-4
-
- // As per https://golang.org/issue/18078, the compiler has trouble
- // compiling the concatenation of many strings, s0 + s1 + s2 + ... + sN,
- // for large N. We insert redundant, explicit parentheses to work around
- // that, lowering the N at any given step: (s0 + s1 + ... + s63) + (s64 +
- // ... + s127) + etc + (etc + ... + sN).
- explicitParens, extraComment := len(s) > 128*1024, ""
- if explicitParens {
- w.printf(`(`)
- extraComment = "; the redundant, explicit parens are for https://golang.org/issue/18078"
- }
-
- // Print "" +\n, if a string does not start on its own line.
- b := w.buf.Bytes()
- if p := len(bytes.TrimRight(b, " \t")); p > 0 && b[p-1] != '\n' {
- w.printf("\"\" + // Size: %d bytes%s\n", len(s), extraComment)
- n, max = maxWidth, maxWidth
- }
-
- w.printf(`"`)
-
- for sz, p, nLines := 0, 0, 0; p < len(s); {
- var r rune
- r, sz = utf8.DecodeRuneInString(s[p:])
- out := s[p : p+sz]
- chars := 1
- if !unicode.IsPrint(r) || r == utf8.RuneError || r == '"' {
- switch sz {
- case 1:
- out = fmt.Sprintf("\\x%02x", s[p])
- case 2, 3:
- out = fmt.Sprintf("\\u%04x", r)
- case 4:
- out = fmt.Sprintf("\\U%08x", r)
- }
- chars = len(out)
- }
- if n -= chars; n < 0 {
- nLines++
- if explicitParens && nLines&63 == 63 {
- w.printf("\") + (\"")
- }
- w.printf("\" +\n\"")
- n = max - len(out)
- }
- w.printf("%s", out)
- p += sz
- }
- w.printf(`"`)
- if explicitParens {
- w.printf(`)`)
- }
-}
-
-// WriteSlice writes a slice value.
-func (w *CodeWriter) WriteSlice(x interface{}) {
- w.writeSlice(x, false)
-}
-
-// WriteArray writes an array value.
-func (w *CodeWriter) WriteArray(x interface{}) {
- w.writeSlice(x, true)
-}
-
-func (w *CodeWriter) writeSlice(x interface{}, isArray bool) {
- v := reflect.ValueOf(x)
- w.gob.Encode(v.Len())
- w.Size += v.Len() * int(v.Type().Elem().Size())
- name := typeName(x)
- if isArray {
- name = fmt.Sprintf("[%d]%s", v.Len(), name[strings.Index(name, "]")+1:])
- }
- if isArray {
- w.printf("%s{\n", name)
- } else {
- w.printf("%s{ // %d elements\n", name, v.Len())
- }
-
- switch kind := v.Type().Elem().Kind(); kind {
- case reflect.String:
- for _, s := range x.([]string) {
- w.WriteString(s)
- w.printf(",\n")
- }
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
- reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
- // nLine and nBlock are the number of elements per line and block.
- nLine, nBlock, format := 8, 64, "%d,"
- switch kind {
- case reflect.Uint8:
- format = "%#02x,"
- case reflect.Uint16:
- format = "%#04x,"
- case reflect.Uint32:
- nLine, nBlock, format = 4, 32, "%#08x,"
- case reflect.Uint, reflect.Uint64:
- nLine, nBlock, format = 4, 32, "%#016x,"
- case reflect.Int8:
- nLine = 16
- }
- n := nLine
- for i := 0; i < v.Len(); i++ {
- if i%nBlock == 0 && v.Len() > nBlock {
- w.printf("// Entry %X - %X\n", i, i+nBlock-1)
- }
- x := v.Index(i).Interface()
- w.gob.Encode(x)
- w.printf(format, x)
- if n--; n == 0 {
- n = nLine
- w.printf("\n")
- }
- }
- w.printf("\n")
- case reflect.Struct:
- zero := reflect.Zero(v.Type().Elem()).Interface()
- for i := 0; i < v.Len(); i++ {
- x := v.Index(i).Interface()
- w.gob.EncodeValue(v)
- if !reflect.DeepEqual(zero, x) {
- line := fmt.Sprintf("%#v,\n", x)
- line = line[strings.IndexByte(line, '{'):]
- w.printf("%d: ", i)
- w.printf(line)
- }
- }
- case reflect.Array:
- for i := 0; i < v.Len(); i++ {
- w.printf("%d: %#v,\n", i, v.Index(i).Interface())
- }
- default:
- panic("gen: slice elem type not supported")
- }
- w.printf("}")
-}
-
-// WriteType writes a definition of the type of the given value and returns the
-// type name.
-func (w *CodeWriter) WriteType(x interface{}) string {
- t := reflect.TypeOf(x)
- w.printf("type %s struct {\n", t.Name())
- for i := 0; i < t.NumField(); i++ {
- w.printf("\t%s %s\n", t.Field(i).Name, t.Field(i).Type)
- }
- w.printf("}\n")
- return t.Name()
-}
-
-// typeName returns the name of the go type of x.
-func typeName(x interface{}) string {
- t := reflect.ValueOf(x).Type()
- return strings.Replace(fmt.Sprint(t), "main.", "", 1)
-}