// htmlReplacer returns s with runes replaced acccording to replacementTable
// and when badRunes is true, certain bad runes are allowed through unescaped.
func htmlReplacer(s string, replacementTable []string, badRunes bool) string {
written, b := 0, new(bytes.Buffer)
for i, r := range s {
if r < len(replacementTable) {
if repl := replacementTable[r]; len(repl) != 0 {
b.WriteString(s[written:i])
b.WriteString(repl)
// Valid as long as replacementTable doesn't
// include anything above 0x7f.
written = i + utf8.RuneLen(r)
}
} else if badRunes {
// No-op.
// IE does not allow these ranges in unquoted attrs.
} else if 0xfdd0 <= r && r <= 0xfdef || 0xfff0 <= r && r <= 0xffff {
fmt.Fprintf(b, "%s&#x%x;", s[written:i], r)
written = i + utf8.RuneLen(r)
}
}
if written == 0 {
return s
}
b.WriteString(s[written:])
return b.String()
}
func runesToString(runes []int) string {
length := 0
for _, v := range runes {
length += utf8.RuneLen(v)
}
data := make([]byte, length)
cur := data
for _, v := range runes {
rlen := utf8.RuneLen(v)
utf8.EncodeRune(cur[0:rlen], v)
cur = cur[rlen:]
}
return string(data)
}
func TestEntityLength(t *testing.T) {
// We verify that the length of UTF-8 encoding of each value is <= 1 + len(key).
// The +1 comes from the leading "&". This property implies that the length of
// unescaped text is <= the length of escaped text.
for k, v := range entity {
if 1+len(k) < utf8.RuneLen(v) {
t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v))
}
}
for k, v := range entity2 {
if 1+len(k) < utf8.RuneLen(v[0])+utf8.RuneLen(v[1]) {
t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v[0]) + string(v[1]))
}
}
}
// Map returns a copy of the byte array s with all its characters modified
// according to the mapping function. If mapping returns a negative value, the character is
// dropped from the string with no replacement. The characters in s and the
// output are interpreted as UTF-8-encoded Unicode code points.
func Map(mapping func(rune int) int, s []byte) []byte {
// In the worst case, the array can grow when mapped, making
// things unpleasant. But it's so rare we barge in assuming it's
// fine. It could also shrink but that falls out naturally.
maxbytes := len(s) // length of b
nbytes := 0 // number of bytes encoded in b
b := make([]byte, maxbytes)
for i := 0; i < len(s); {
wid := 1
rune := int(s[i])
if rune >= utf8.RuneSelf {
rune, wid = utf8.DecodeRune(s[i:])
}
rune = mapping(rune)
if rune >= 0 {
if nbytes+utf8.RuneLen(rune) > maxbytes {
// Grow the buffer.
maxbytes = maxbytes*2 + utf8.UTFMax
nb := make([]byte, maxbytes)
copy(nb, b[0:nbytes])
b = nb
}
nbytes += utf8.EncodeRune(b[nbytes:maxbytes], rune)
}
i += wid
}
return b[0:nbytes]
}
// replace replaces each rune r of s with replacementTable[r], provided that
// r < len(replacementTable). If replacementTable[r] is the empty string then
// no replacement is made.
// It also replaces runes U+2028 and U+2029 with the raw strings `\u2028` and
// `\u2029`.
func replace(s string, replacementTable []string) string {
var b bytes.Buffer
written := 0
for i, r := range s {
var repl string
switch {
case int(r) < len(replacementTable) && replacementTable[r] != "":
repl = replacementTable[r]
case r == '\u2028':
repl = `\u2028`
case r == '\u2029':
repl = `\u2029`
default:
continue
}
b.WriteString(s[written:i])
b.WriteString(repl)
written = i + utf8.RuneLen(r)
}
if written == 0 {
return s
}
b.WriteString(s[written:])
return b.String()
}
func Write(fd int, p []byte) (n int, errno int) {
var mode uint32
var done uint32
if isConsole, _ := GetConsoleMode(int32(fd), &mode); UnicodeConsoleOutput && isConsole {
// TODO: The number of TCHARs to write. If the total size of the
// specified number of characters exceeds 64 KB, the function fails with ERROR_NOT_ENOUGH_MEMORY.
buf16 := utf16.Encode([]int(string(p)))
//for _, c := range buf16 { print(c," ") } ; println()
if ok, e := WriteConsole(int32(fd), buf16, &done); !ok {
return 0, e
}
// convert length of utf16 characters to number of bytes written
if done == uint32(len(buf16)) {
done = uint32(len(p))
} else {
done = 0
for _, rune := range utf16.Decode(buf16[:done]) {
done += uint32(utf8.RuneLen(rune))
}
}
} else {
// TODO: This might as well fail with large writes, only Microsoft doesn't say that, see
// http://code.google.com/p/msysgit/issues/detail?id=409 for example
if ok, e := syscall.WriteFile(int32(fd), p, &done, nil); !ok {
return 0, e
}
}
return int(done), 0
}
// Map returns a copy of the string s with all its characters modified
// according to the mapping function.
func Map(mapping func(rune int) int, s string) string {
// In the worst case, the string can grow when mapped, making
// things unpleasant. But it's so rare we barge in assuming it's
// fine. It could also shrink but that falls out naturally.
maxbytes := len(s) // length of b
nbytes := 0 // number of bytes encoded in b
b := make([]byte, maxbytes)
for _, c := range s {
rune := mapping(c)
wid := 1
if rune >= utf8.RuneSelf {
wid = utf8.RuneLen(rune)
}
if nbytes+wid > maxbytes {
// Grow the buffer.
maxbytes = maxbytes*2 + utf8.UTFMax
nb := make([]byte, maxbytes)
for i, c := range b[0:nbytes] {
nb[i] = c
}
b = nb
}
nbytes += utf8.EncodeRune(rune, b[nbytes:maxbytes])
}
return string(b[0:nbytes])
}
func TestEntityLength(t *testing.T) {
// We verify that the length of UTF-8 encoding of each value is <= 1 + len(key).
// The +1 comes from the leading "&". This property implies that the length of
// unescaped text is <= the length of escaped text.
for k, v := range entity {
if 1+len(k) < utf8.RuneLen(v) {
t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v))
}
if len(k) > longestEntityWithoutSemicolon && k[len(k)-1] != ';' {
t.Errorf("entity name %s is %d characters, but longestEntityWithoutSemicolon=%d", k, len(k), longestEntityWithoutSemicolon)
}
}
for k, v := range entity2 {
if 1+len(k) < utf8.RuneLen(v[0])+utf8.RuneLen(v[1]) {
t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v[0]) + string(v[1]))
}
}
}
func main() {
fmt.Println("Strings now...")
for i := 1; i <= 100; i++ {
for j := 0; j <= i; j++ {
fmt.Printf("A")
}
fmt.Println()
}
fmt.Println("Counting chars")
input := "asSASA ddd dsjkdsjs dk"
fmt.Printf("Number of chars in %s: %d\n", input, len(input))
bytes := []byte(input)
fmt.Printf("Number of bytes in %s: %d\n", input, len(bytes))
fmt.Println("Now with unicode...")
input = "aΦx"
for pos, char := range input {
fmt.Printf("character '%c' starts at byte position %d\n", char, pos)
}
var num_bytes = 0
for _, char := range input {
num_bytes += utf8.RuneLen(char)
}
fmt.Printf("%s contains %d bytes\n", input, num_bytes)
fmt.Println("Swapping chars...")
input = "asSASA ddd dsjkdsjs dk"
var output = ""
for pos, char := range input {
switch pos {
case 3:
output = output + "a"
case 4:
output = output + "b"
case 5:
output = output + "c"
default:
output = output + string(char)
}
}
fmt.Println(output)
fmt.Println("Swapping chars...")
input = "foobar"
temp := []byte(input)
for i, j := 0, len(temp)-1; i < j; i, j = i+1, j-1 {
temp[i], temp[j] = temp[j], temp[i]
}
fmt.Println(string(temp))
}
func urlquoter(c int, safe string) []byte {
safe_bytes := strings.Bytes(safe);
c_bytes := make([]byte, utf8.RuneLen(c));
utf8.EncodeRune(c, c_bytes);
if bytes.Index(safe_bytes, c_bytes) != -1 || bytes.Index(always_safe, c_bytes) != -1 {
return c_bytes;
}
else {
return strings.Bytes(fmt.Sprintf("%%%02X", c));
}
panic("unreachable");
}
/*
Capitalizes the first character of the value.
Example:
{value|capfirst}
If value is "neste", the output will be "Neste".
*/
func CapFirstFormatter(w io.Writer, formatter string, data ...interface{}) {
b := getBytes(data...)
if len(b) > 0 {
rune, size := utf8.DecodeRune(b)
rune = unicode.ToUpper(rune)
capSize := utf8.RuneLen(rune)
capb := make([]byte, capSize)
utf8.EncodeRune(capb, rune)
w.Write(capb)
w.Write(b[size:])
}
}
func (r *DelimReader) Read(p []byte) (n int, err os.Error) {
bytes_written := 0
if r.remainder != nil {
for i := 0; i < len(r.remainder); i++ {
p[i] = r.remainder[i]
bytes_written++
}
r.remainder = nil
}
for bytes_written < len(p) {
rune, size, err := r.reader.ReadRune()
if err != nil {
return bytes_written, err
}
for _, value := range r.delimiters {
if value == rune {
rune = r.used_delimiter
size = utf8.RuneLen(rune)
}
}
if bytes_written+size > len(p) {
// we need to split the rune and hold on to the remainder
writable := len(p) - bytes_written
target := make([]byte, size)
_ = utf8.EncodeRune(target, rune)
for i := 0; i < writable; i++ {
p[bytes_written] = target[i]
bytes_written++
}
r.remainder = target[writable:]
} else {
target := p[bytes_written : bytes_written+size]
_ = utf8.EncodeRune(target, rune)
bytes_written += size
}
}
return bytes_written, nil
}
// Return all anchored substrings of the given string within the Trie, with a matching set of
// their associated values.
func (p *Trie) AllSubstringsAndValues(s string) (*vector.StringVector, *vector.Vector) {
sv := new(vector.StringVector)
vv := new(vector.Vector)
for pos, rune := range s {
child, ok := p.children[rune]
if !ok {
// return whatever we have so far
break
}
// if this is a leaf node, add the string so far and its value
if child.leaf {
sv.Push(s[0 : pos+utf8.RuneLen(rune)])
vv.Push(child.value)
}
p = child
}
return sv, vv
}
// Map returns a copy of the string s with all its characters modified
// according to the mapping function. If mapping returns a negative value, the character is
// dropped from the string with no replacement.
func Map(mapping func(rune) rune, s string) string {
// In the worst case, the string can grow when mapped, making
// things unpleasant. But it's so rare we barge in assuming it's
// fine. It could also shrink but that falls out naturally.
maxbytes := len(s) // length of b
nbytes := 0 // number of bytes encoded in b
// The output buffer b is initialized on demand, the first
// time a character differs.
var b []byte
for i, c := range s {
r := mapping(c)
if b == nil {
if r == c {
continue
}
b = make([]byte, maxbytes)
nbytes = copy(b, s[:i])
}
if r >= 0 {
wid := 1
if r >= utf8.RuneSelf {
wid = utf8.RuneLen(r)
}
if nbytes+wid > maxbytes {
// Grow the buffer.
maxbytes = maxbytes*2 + utf8.UTFMax
nb := make([]byte, maxbytes)
copy(nb, b[0:nbytes])
b = nb
}
nbytes += utf8.EncodeRune(b[nbytes:maxbytes], r)
}
}
if b == nil {
return s
}
return string(b[0:nbytes])
}
func tr(conn *irc.Conn, nick *irc.Nick, args, target string) {
if args == "" {
return
}
var sourcelang, targetlang, text string
index := strings.IndexAny(args, " ") // handle spaces and ideographic spaces (U+3000)
if index == 5 && args[2] == '|' {
sourcelang = args[:2]
targetlang = args[3:5]
if args[5] == ' ' {
text = args[6:]
} else {
text = args[5+utf8.RuneLen(3000):]
}
} else {
sourcelang = "auto"
targetlang = "en"
text = args
}
say(conn, target, translate(sourcelang, targetlang, text))
}
func (s *ss) ReadRune() (rune int, size int, err os.Error) {
if s.peekRune >= 0 {
s.count++
rune = s.peekRune
size = utf8.RuneLen(rune)
s.prevRune = rune
s.peekRune = -1
return
}
if s.atEOF || s.nlIsEnd && s.prevRune == '\n' || s.count >= s.fieldLimit {
err = os.EOF
return
}
rune, size, err = s.rr.ReadRune()
if err == nil {
s.count++
s.prevRune = rune
} else if err == os.EOF {
s.atEOF = true
}
return
}
// cssEscaper escapes HTML and CSS special characters using \<hex>+ escapes.
func cssEscaper(args ...interface{}) string {
s, _ := stringify(args...)
var b bytes.Buffer
written := 0
for i, r := range s {
var repl string
switch r {
case 0:
repl = `\0`
case '\t':
repl = `\9`
case '\n':
repl = `\a`
case '\f':
repl = `\c`
case '\r':
repl = `\d`
// Encode HTML specials as hex so the output can be embedded
// in HTML attributes without further encoding.
case '"':
repl = `\22`
case '&':
repl = `\26`
case '\'':
repl = `\27`
case '(':
repl = `\28`
case ')':
repl = `\29`
case '+':
repl = `\2b`
case '/':
repl = `\2f`
case ':':
repl = `\3a`
case ';':
repl = `\3b`
case '<':
repl = `\3c`
case '>':
repl = `\3e`
case '\\':
repl = `\\`
case '{':
repl = `\7b`
case '}':
repl = `\7d`
default:
continue
}
b.WriteString(s[written:i])
b.WriteString(repl)
written = i + utf8.RuneLen(r)
if repl != `\\` && (written == len(s) || isHex(s[written]) || isCSSSpace(s[written])) {
b.WriteByte(' ')
}
}
if written == 0 {
return s
}
b.WriteString(s[written:])
return b.String()
}
// integer; interprets prec but not wid. Once formatted, result is sent to pad()
// and then flags are cleared.
func (f *fmt) integer(a int64, base uint64, signedness bool, digits string) {
// precision of 0 and value of 0 means "print nothing"
if f.precPresent && f.prec == 0 && a == 0 {
return
}
var buf []byte = f.intbuf[0:]
negative := signedness == signed && a < 0
if negative {
a = -a
}
// two ways to ask for extra leading zero digits: %.3d or %03d.
// apparently the first cancels the second.
prec := 0
if f.precPresent {
prec = f.prec
f.zero = false
} else if f.zero && f.widPresent && !f.minus && f.wid > 0 {
prec = f.wid
if negative || f.plus || f.space {
prec-- // leave room for sign
}
}
// format a into buf, ending at buf[i]. (printing is easier right-to-left.)
// a is made into unsigned ua. we could make things
// marginally faster by splitting the 32-bit case out into a separate
// block but it's not worth the duplication, so ua has 64 bits.
i := len(f.intbuf)
ua := uint64(a)
for ua >= base {
i--
buf[i] = digits[ua%base]
ua /= base
}
i--
buf[i] = digits[ua]
for i > 0 && prec > nByte-i {
i--
buf[i] = '0'
}
// Various prefixes: 0x, -, etc.
if f.sharp {
switch base {
case 8:
if buf[i] != '0' {
i--
buf[i] = '0'
}
case 16:
i--
buf[i] = 'x' + digits[10] - 'a'
i--
buf[i] = '0'
}
}
if f.unicode {
i--
buf[i] = '+'
i--
buf[i] = 'U'
}
if negative {
i--
buf[i] = '-'
} else if f.plus {
i--
buf[i] = '+'
} else if f.space {
i--
buf[i] = ' '
}
// If we want a quoted char for %#U, move the data up to make room.
if f.unicode && f.uniQuote && a >= 0 && a <= unicode.MaxRune && unicode.IsPrint(int(a)) {
runeWidth := utf8.RuneLen(int(a))
width := 1 + 1 + runeWidth + 1 // space, quote, rune, quote
copy(buf[i-width:], buf[i:]) // guaranteed to have enough room.
i -= width
// Now put " 'x'" at the end.
j := len(buf) - width
buf[j] = ' '
j++
buf[j] = '\''
j++
utf8.EncodeRune(buf[j:], int(a))
j += runeWidth
buf[j] = '\''
}
f.pad(buf[i:])
}
func unreadRune(state *LexerState, reader *bufio.Reader, rune int) {
unreadBytes(state, reader, utf8.RuneLen(rune))
}