1 files changed, 132 insertions, 0 deletions
diff --git a/libgo/go/unicode/graphic.go b/libgo/go/unicode/graphic.go
new file mode 100644
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+++ b/libgo/go/unicode/graphic.go
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+// 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.
+
+package unicode
+
+// Bit masks for each code point under U+0100, for fast lookup.
+const (
+	pC  = 1 << iota // a control character.
+	pP              // a punctuation character.
+	pN              // a numeral.
+	pS              // a symbolic character.
+	pZ              // a spacing character.
+	pLu             // an upper-case letter.
+	pLl             // a lower-case letter.
+	pp              // a printable character according to Go's definition.
+	pg  = pp | pZ   // a graphical character according to the Unicode definition.
+)
+
+// GraphicRanges defines the set of graphic characters according to Unicode.
+var GraphicRanges = []*RangeTable{
+	L, M, N, P, S, Zs,
+}
+
+// PrintRanges defines the set of printable characters according to Go.
+// ASCII space, U+0020, is handled separately.
+var PrintRanges = []*RangeTable{
+	L, M, N, P, S,
+}
+
+// IsGraphic reports whether the rune is defined as a Graphic by Unicode.
+// Such characters include letters, marks, numbers, punctuation, symbols, and
+// spaces, from categories L, M, N, P, S, Zs.
+func IsGraphic(rune int) bool {
+	// We cast to uint32 to avoid the extra test for negative,
+	// and in the index we cast to uint8 to avoid the range check.
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pg != 0
+	}
+	return IsOneOf(GraphicRanges, rune)
+}
+
+// IsPrint reports whether the rune is defined as printable by Go. Such
+// characters include letters, marks, numbers, punctuation, symbols, and the
+// ASCII space character, from categories L, M, N, P, S and the ASCII space
+// character.  This categorization is the same as IsGraphic except that the
+// only spacing character is ASCII space, U+0020.
+func IsPrint(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pp != 0
+	}
+	return IsOneOf(PrintRanges, rune)
+}
+
+// IsOneOf reports whether the rune is a member of one of the ranges.
+// The rune is known to be above Latin-1.
+func IsOneOf(set []*RangeTable, rune int) bool {
+	for _, inside := range set {
+		if Is(inside, rune) {
+			return true
+		}
+	}
+	return false
+}
+
+// IsControl reports whether the rune is a control character.
+// The C (Other) Unicode category includes more code points
+// such as surrogates; use Is(C, rune) to test for them.
+func IsControl(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pC != 0
+	}
+	// All control characters are < Latin1Max.
+	return false
+}
+
+// IsLetter reports whether the rune is a letter (category L).
+func IsLetter(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&(pLu|pLl) != 0
+	}
+	return Is(Letter, rune)
+}
+
+// IsMark reports whether the rune is a mark character (category M).
+func IsMark(rune int) bool {
+	// There are no mark characters in Latin-1.
+	return Is(Mark, rune)
+}
+
+// IsNumber reports whether the rune is a number (category N).
+func IsNumber(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pN != 0
+	}
+	return Is(Number, rune)
+}
+
+// IsPunct reports whether the rune is a Unicode punctuation character
+// (category P).
+func IsPunct(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pP != 0
+	}
+	return Is(Punct, rune)
+}
+
+// IsSpace reports whether the rune is a space character as defined
+// by Unicode's White Space property; in the Latin-1 space
+// this is
+//	'\t', '\n', '\v', '\f', '\r', ' ', U+0085 (NEL), U+00A0 (NBSP).
+// Other definitions of spacing characters are set by category
+// Z and property Pattern_White_Space.
+func IsSpace(rune int) bool {
+	// This property isn't the same as Z; special-case it.
+	if uint32(rune) <= MaxLatin1 {
+		switch rune {
+		case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xA0:
+			return true
+		}
+		return false
+	}
+	return Is(White_Space, rune)
+}
+
+// IsSymbol reports whether the rune is a symbolic character.
+func IsSymbol(rune int) bool {
+	if uint32(rune) <= MaxLatin1 {
+		return properties[uint8(rune)]&pS != 0
+	}
+	return Is(Symbol, rune)
+}