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2009-11-28T06:05:01.930
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2009-11-28T06:05:01.930
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<p>Found this script that implements sprintf - and that's exactly what I was looking for. Thanks to Manish Jethani!</p> <pre><code>/* sprintf(3) implementation in ActionScript 3.0. * * Author: Manish Jethani (manish.jethani@gmail.com) * Date: April 3, 2006 * Version: 0.1 * * Copyright (c) 2006 Manish Jethani * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ package { /* sprintf(3) implementation in ActionScript 3.0. * * http://www.die.net/doc/linux/man/man3/sprintf.3.html * * The following flags are supported: '#', '0', '-', '+' * * Field widths are fully supported. '*' is not supported. * * Precision is supported except one difference from the standard: for an * explicit precision of 0 and a result string of "0", the output is "0" * instead of an empty string. * * Length modifiers are not supported. * * The following conversion specifiers are supported: 'd', 'i', 'o', 'u', 'x', * 'X', 'f', 'F', 'c', 's', '%' * * Report bugs to manish.jethani@gmail.com */ public function sprintf(format:String, ... args):String { var result:String = ""; var length:int = format.length; for (var i:int = 0; i < length; i++) { var c:String = format.charAt(i); if (c == "%") { var pastFieldWidth:Boolean = false; var pastFlags:Boolean = false; var flagAlternateForm:Boolean = false; var flagZeroPad:Boolean = false; var flagLeftJustify:Boolean = false; var flagSpace:Boolean = false; var flagSign:Boolean = false; var fieldWidth:String = ""; var precision:String = ""; c = format.charAt(++i); while (c != "d" && c != "i" && c != "o" && c != "u" && c != "x" && c != "X" && c != "f" && c != "F" && c != "c" && c != "s" && c != "%") { if (!pastFlags) { if (!flagAlternateForm && c == "#") flagAlternateForm = true; else if (!flagZeroPad && c == "0") flagZeroPad = true; else if (!flagLeftJustify && c == "-") flagLeftJustify = true; else if (!flagSpace && c == " ") flagSpace = true; else if (!flagSign && c == "+") flagSign = true; else pastFlags = true; } if (!pastFieldWidth && c == ".") { pastFlags = true; pastFieldWidth = true; c = format.charAt(++i); continue; } if (pastFlags) { if (!pastFieldWidth) fieldWidth += c; else precision += c; } c = format.charAt(++i); } switch (c) { case "d": case "i": var next:* = args.shift(); var str:String = String(Math.abs(int(next))); if (precision != "") str = leftPad(str, int(precision), "0"); if (int(next) < 0) str = "-" + str; else if (flagSign && int(next) >= 0) str = "+" + str; if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else if (flagZeroPad && precision == "") str = leftPad(str, int(fieldWidth), "0"); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "o": var next:* = args.shift(); var str:String = uint(next).toString(8); if (flagAlternateForm && str != "0") str = "0" + str; if (precision != "") str = leftPad(str, int(precision), "0"); if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else if (flagZeroPad && precision == "") str = leftPad(str, int(fieldWidth), "0"); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "u": var next:* = args.shift(); var str:String = uint(next).toString(10); if (precision != "") str = leftPad(str, int(precision), "0"); if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else if (flagZeroPad && precision == "") str = leftPad(str, int(fieldWidth), "0"); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "X": var capitalise:Boolean = true; case "x": var next:* = args.shift(); var str:String = uint(next).toString(16); if (precision != "") str = leftPad(str, int(precision), "0"); var prepend:Boolean = flagAlternateForm && uint(next) != 0; if (fieldWidth != "" && !flagLeftJustify && flagZeroPad && precision == "") str = leftPad(str, prepend ? int(fieldWidth) - 2 : int(fieldWidth), "0"); if (prepend) str = "0x" + str; if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else str = leftPad(str, int(fieldWidth)); } if (capitalise) str = str.toUpperCase(); result += str; break; case "f": case "F": var next:* = args.shift(); var str:String = Math.abs(Number(next)).toFixed( precision != "" ? int(precision) : 6); if (int(next) < 0) str = "-" + str; else if (flagSign && int(next) >= 0) str = "+" + str; if (flagAlternateForm && str.indexOf(".") == -1) str += "."; if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else if (flagZeroPad && precision == "") str = leftPad(str, int(fieldWidth), "0"); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "c": var next:* = args.shift(); var str:String = String.fromCharCode(int(next)); if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "s": var next:* = args.shift(); var str:String = String(next); if (precision != "") str = str.substring(0, int(precision)); if (fieldWidth != "") { if (flagLeftJustify) str = rightPad(str, int(fieldWidth)); else str = leftPad(str, int(fieldWidth)); } result += str; break; case "%": result += "%"; } } else { result += c; } } return result; } } // Private functions function leftPad(source:String, targetLength:int, padChar:String = " "):String { if (source.length < targetLength) { var padding:String = ""; while (padding.length + source.length < targetLength) padding += padChar; return padding + source; } return source; } function rightPad(source:String, targetLength:int, padChar:String = " "):String { while (source.length < targetLength) source += padChar; return source; } </code></pre>
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