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@ -1,501 +0,0 @@
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Functions operating on ASCII characters.
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*
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* ASCII is $(B A)merican $(B S)tandard $(B C)ode for $(B I)nformation
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* $(B I)nterchange.
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*
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* Copyright: Eugene Wissner 2017-2020.
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* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
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* Mozilla Public License, v. 2.0).
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* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
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* Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/encoding/tanya/encoding/ascii.d,
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* tanya/encoding/ascii.d)
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*/
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module tanya.encoding.ascii;
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import tanya.meta.trait;
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immutable string fullHexDigits = "0123456789ABCDEFabcdef"; /// 0..9A..Fa..f.
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immutable string hexDigits = "0123456789ABCDEF"; /// 0..9A..F.
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immutable string lowerHexDigits = "0123456789abcdef"; /// 0..9a..f.
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immutable string digits = "0123456789"; /// 0..9.
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immutable string octalDigits = "01234567"; /// 0..7.
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/// A..Za..z.
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immutable string letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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immutable string uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; /// A..Z.
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immutable string lowercase = "abcdefghijklmnopqrstuvwxyz"; /// a..z.
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/**
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* Whitespace, Horizontal Tab (HT), Line Feed (LF), Carriage Return (CR),
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* Vertical Tab (VT) or Form Feed (FF).
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*/
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immutable string whitespace = "\t\n\v\f\r ";
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/// Letter case specifier.
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enum LetterCase : bool
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{
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upper, /// Uppercase.
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lower, /// Lowercase.
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}
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/**
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* Checks for an uppecase alphabetic character.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is an uppercase alphabetic
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* character, $(D_KEYWORD false) otherwise.
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*/
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bool isUpper(C)(C c)
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if (isSomeChar!C)
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{
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return (c >= 'A') && (c <= 'Z');
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isUpper('A'));
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assert(isUpper('Z'));
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assert(isUpper('L'));
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assert(!isUpper('a'));
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assert(!isUpper('!'));
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}
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/**
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* Checks for a lowercase alphabetic character.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a lowercase alphabetic
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* character, $(D_KEYWORD false) otherwise.
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*/
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bool isLower(C)(C c)
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if (isSomeChar!C)
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{
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return (c >= 'a') && (c <= 'z');
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isLower('a'));
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assert(isLower('z'));
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assert(isLower('l'));
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assert(!isLower('A'));
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assert(!isLower('!'));
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}
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/**
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* Checks for an alphabetic character (upper- or lowercase).
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is an alphabetic character,
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* $(D_KEYWORD false) otherwise.
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*/
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bool isAlpha(C)(C c)
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if (isSomeChar!C)
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{
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return isUpper(c) || isLower(c);
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isAlpha('A'));
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assert(isAlpha('Z'));
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assert(isAlpha('L'));
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assert(isAlpha('a'));
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assert(isAlpha('z'));
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assert(isAlpha('l'));
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assert(!isAlpha('!'));
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}
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/**
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* Checks for a digit.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a digit,
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* $(D_KEYWORD false) otherwise.
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*/
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bool isDigit(C)(C c)
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if (isSomeChar!C)
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{
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return (c >= '0') && (c <= '9');
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isDigit('0'));
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assert(isDigit('1'));
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assert(isDigit('2'));
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assert(isDigit('3'));
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assert(isDigit('4'));
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assert(isDigit('5'));
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assert(isDigit('6'));
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assert(isDigit('7'));
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assert(isDigit('8'));
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assert(isDigit('9'));
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assert(!isDigit('a'));
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assert(!isDigit('!'));
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}
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/**
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* Checks for an alphabetic character (upper- or lowercase) or a digit.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is an alphabetic character or a
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* digit, $(D_KEYWORD false) otherwise.
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*/
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bool isAlphaNum(C)(C c)
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if (isSomeChar!C)
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{
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return isAlpha(c) || isDigit(c);
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isAlphaNum('0'));
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assert(isAlphaNum('1'));
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assert(isAlphaNum('9'));
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assert(isAlphaNum('A'));
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assert(isAlphaNum('Z'));
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assert(isAlphaNum('L'));
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assert(isAlphaNum('a'));
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assert(isAlphaNum('z'));
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assert(isAlphaNum('l'));
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assert(!isAlphaNum('!'));
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}
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/**
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* Checks for a 7-bit ASCII character.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is an ASCII character,
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* $(D_KEYWORD false) otherwise.
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*/
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bool isASCII(C)(C c)
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if (isSomeChar!C)
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{
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return c < 128;
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isASCII('0'));
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assert(isASCII('L'));
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assert(isASCII('l'));
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assert(isASCII('!'));
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assert(!isASCII('©'));
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assert(!isASCII('§'));
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assert(!isASCII(char.init)); // 0xFF
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assert(!isASCII(wchar.init)); // 0xFFFF
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assert(!isASCII(dchar.init)); // 0xFFFF
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}
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/**
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* Checks for a control character.
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*
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* Control characters are non-printable characters. Their ASCII codes are those
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* between 0x00 (NUL) and 0x1f (US), and 0x7f (DEL).
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a control character,
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* $(D_KEYWORD false) otherwise.
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*
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* See_Also: $(D_PSYMBOL isPrintable), $(D_PSYMBOL isGraphical).
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*/
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bool isControl(C)(C c)
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if (isSomeChar!C)
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{
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return (c <= 0x1f) || (c == 0x7f);
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isControl('\t'));
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assert(isControl('\0'));
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assert(isControl('\u007f'));
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assert(!isControl(' '));
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assert(!isControl('a'));
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assert(!isControl(char.init)); // 0xFF
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assert(!isControl(wchar.init)); // 0xFFFF
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}
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/**
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* Checks for a whitespace character.
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*
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* Whitespace characters are:
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*
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* $(UL
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* $(LI Whitespace)
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* $(LI Horizontal Tab (HT))
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* $(LI Line Feed (LF))
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* $(LI Carriage Return (CR))
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* $(LI Vertical Tab (VT))
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* $(LI Form Feed (FF))
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* )
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a whitespace character,
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* $(D_KEYWORD false) otherwise.
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*
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* See_Also: $(D_PSYMBOL whitespace).
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*/
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bool isWhite(C)(C c)
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if (isSomeChar!C)
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{
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return ((c >= 0x09) && (c <= 0x0d)) || (c == 0x20);
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isWhite('\t'));
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assert(isWhite('\n'));
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assert(isWhite('\v'));
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assert(isWhite('\f'));
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assert(isWhite('\r'));
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assert(isWhite(' '));
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}
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/**
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* Checks for a graphical character.
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*
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* Graphical characters are printable characters but whitespace characters.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a control character,
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* $(D_KEYWORD false) otherwise.
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*
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* See_Also: $(D_PSYMBOL isControl), $(D_PSYMBOL isWhite).
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*/
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bool isGraphical(C)(C c)
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if (isSomeChar!C)
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{
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return (c > 0x20) && (c < 0x7f);
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}
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///
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@nogc nothrow pure @safe unittest
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{
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assert(isGraphical('a'));
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assert(isGraphical('0'));
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assert(!isGraphical('\u007f'));
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assert(!isGraphical('§'));
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assert(!isGraphical('\n'));
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assert(!isGraphical(' '));
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}
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/**
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* Checks for a printable character.
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*
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* This is the opposite of a control character.
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*
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* Params:
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* C = Some character type.
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* c = Some character.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a control character,
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* $(D_KEYWORD false) otherwise.
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*
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* See_Also: $(D_PSYMBOL isControl).
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*/
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bool isPrintable(C)(C c)
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if (isSomeChar!C)
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{
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return (c >= 0x20) && (c < 0x7f);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(isPrintable('a'));
|
|
|
|
|
assert(isPrintable('0'));
|
|
|
|
|
assert(!isPrintable('\u007f'));
|
|
|
|
|
assert(!isPrintable('§'));
|
|
|
|
|
assert(!isPrintable('\n'));
|
|
|
|
|
assert(isPrintable(' '));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Checks for a hexadecimal digit.
|
|
|
|
|
*
|
|
|
|
|
* Params:
|
|
|
|
|
* C = Some character type.
|
|
|
|
|
* c = Some character.
|
|
|
|
|
*
|
|
|
|
|
* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a hexadecimal digit,
|
|
|
|
|
* $(D_KEYWORD false) otherwise.
|
|
|
|
|
*/
|
|
|
|
|
bool isHexDigit(C)(C c)
|
|
|
|
|
if (isSomeChar!C)
|
|
|
|
|
{
|
|
|
|
|
return ((c >= '0') && (c <= '9'))
|
|
|
|
|
|| ((c >= 'a') && (c <= 'f'))
|
|
|
|
|
|| ((c >= 'A') && (c <= 'F'));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(isHexDigit('0'));
|
|
|
|
|
assert(isHexDigit('1'));
|
|
|
|
|
assert(isHexDigit('8'));
|
|
|
|
|
assert(isHexDigit('9'));
|
|
|
|
|
assert(isHexDigit('A'));
|
|
|
|
|
assert(isHexDigit('F'));
|
|
|
|
|
assert(!isHexDigit('G'));
|
|
|
|
|
assert(isHexDigit('a'));
|
|
|
|
|
assert(isHexDigit('f'));
|
|
|
|
|
assert(!isHexDigit('g'));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Checks for an octal character.
|
|
|
|
|
*
|
|
|
|
|
* Params:
|
|
|
|
|
* C = Some character type.
|
|
|
|
|
* c = Some character.
|
|
|
|
|
*
|
|
|
|
|
* Returns: $(D_KEYWORD true) if $(D_PARAM c) is an octal character,
|
|
|
|
|
* $(D_KEYWORD false) otherwise.
|
|
|
|
|
*/
|
|
|
|
|
bool isOctalDigit(C)(C c)
|
|
|
|
|
if (isSomeChar!C)
|
|
|
|
|
{
|
|
|
|
|
return (c >= '0') && (c <= '7');
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(isOctalDigit('0'));
|
|
|
|
|
assert(isOctalDigit('1'));
|
|
|
|
|
assert(isOctalDigit('2'));
|
|
|
|
|
assert(isOctalDigit('3'));
|
|
|
|
|
assert(isOctalDigit('4'));
|
|
|
|
|
assert(isOctalDigit('5'));
|
|
|
|
|
assert(isOctalDigit('6'));
|
|
|
|
|
assert(isOctalDigit('7'));
|
|
|
|
|
assert(!isOctalDigit('8'));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Checks for a octal character.
|
|
|
|
|
*
|
|
|
|
|
* Params:
|
|
|
|
|
* C = Some character type.
|
|
|
|
|
* c = Some character.
|
|
|
|
|
*
|
|
|
|
|
* Returns: $(D_KEYWORD true) if $(D_PARAM c) is a octal character,
|
|
|
|
|
* $(D_KEYWORD false) otherwise.
|
|
|
|
|
*/
|
|
|
|
|
bool isPunctuation(C)(C c)
|
|
|
|
|
if (isSomeChar!C)
|
|
|
|
|
{
|
|
|
|
|
return ((c >= 0x21) && (c <= 0x2f))
|
|
|
|
|
|| ((c >= 0x3a) && (c <= 0x40))
|
|
|
|
|
|| ((c >= 0x5b) && (c <= 0x60))
|
|
|
|
|
|| ((c >= 0x7b) && (c <= 0x7e));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(isPunctuation('!'));
|
|
|
|
|
assert(isPunctuation(':'));
|
|
|
|
|
assert(isPunctuation('\\'));
|
|
|
|
|
assert(isPunctuation('|'));
|
|
|
|
|
assert(!isPunctuation('0'));
|
|
|
|
|
assert(!isPunctuation(' '));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Converts $(D_PARAM c) to uppercase.
|
|
|
|
|
*
|
|
|
|
|
* If $(D_PARAM c) is not a lowercase character, $(D_PARAM c) is returned
|
|
|
|
|
* unchanged.
|
|
|
|
|
*
|
|
|
|
|
* Params:
|
|
|
|
|
* C = Some character type.
|
|
|
|
|
* c = Some character.
|
|
|
|
|
*
|
|
|
|
|
* Returns: The lowercase of $(D_PARAM c) if available, just $(D_PARAM c)
|
|
|
|
|
* otherwise.
|
|
|
|
|
*/
|
|
|
|
|
C toUpper(C)(C c)
|
|
|
|
|
if (isSomeChar!C)
|
|
|
|
|
{
|
|
|
|
|
return isLower(c) ? (cast(C) (c - 32)) : c;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(toUpper('a') == 'A');
|
|
|
|
|
assert(toUpper('A') == 'A');
|
|
|
|
|
assert(toUpper('!') == '!');
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Converts $(D_PARAM c) to lowercase.
|
|
|
|
|
*
|
|
|
|
|
* If $(D_PARAM c) is not an uppercase character, $(D_PARAM c) is returned
|
|
|
|
|
* unchanged.
|
|
|
|
|
*
|
|
|
|
|
* Params:
|
|
|
|
|
* C = Some character type.
|
|
|
|
|
* c = Some character.
|
|
|
|
|
*
|
|
|
|
|
* Returns: The uppercase of $(D_PARAM c) if available, just $(D_PARAM c)
|
|
|
|
|
* otherwise.
|
|
|
|
|
*/
|
|
|
|
|
C toLower(C)(C c)
|
|
|
|
|
if (isSomeChar!C)
|
|
|
|
|
{
|
|
|
|
|
return isUpper(c) ? (cast(C) (c + 32)) : c;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
///
|
|
|
|
|
@nogc nothrow pure @safe unittest
|
|
|
|
|
{
|
|
|
|
|
assert(toLower('A') == 'a');
|
|
|
|
|
assert(toLower('a') == 'a');
|
|
|
|
|
assert(toLower('!') == '!');
|
|
|
|
|
}
|