Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Runtime / DecimalFormatter.cs / 1305376 / DecimalFormatter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Diagnostics; using System.Globalization; using System.Text; namespace System.Xml.Xsl.Runtime { using Res = System.Xml.Utils.Res; internal class DecimalFormat { public NumberFormatInfo info; public char digit; public char zeroDigit; public char patternSeparator; internal DecimalFormat(NumberFormatInfo info, char digit, char zeroDigit, char patternSeparator) { this.info = info; this.digit = digit; this.zeroDigit = zeroDigit; this.patternSeparator = patternSeparator; } } internal class DecimalFormatter { private NumberFormatInfo posFormatInfo; private NumberFormatInfo negFormatInfo; private string posFormat; private string negFormat; private char zeroDigit; // These characters have special meaning for CLR and must be escaped //http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconcustomnumericformatstrings.asp private const string ClrSpecialChars = "0#.,%\u2030Ee\\'\";"; // This character is used to escape literal (passive) digits '0'..'9' private const char EscChar = '\a'; public DecimalFormatter(string formatPicture, DecimalFormat decimalFormat) { Debug.Assert(formatPicture != null && decimalFormat != null); if (formatPicture.Length == 0) { throw XsltException.Create(Res.Xslt_InvalidFormat); } zeroDigit = decimalFormat.zeroDigit; posFormatInfo = (NumberFormatInfo)decimalFormat.info.Clone(); StringBuilder temp = new StringBuilder(); bool integer = true; bool sawPattern = false, sawZeroDigit = false, sawDigit = false, sawDecimalSeparator = false; bool digitOrZeroDigit = false; char decimalSeparator = posFormatInfo.NumberDecimalSeparator[0]; char groupSeparator = posFormatInfo.NumberGroupSeparator[0]; char percentSymbol = posFormatInfo.PercentSymbol[0]; char perMilleSymbol = posFormatInfo.PerMilleSymbol[0]; int commaIndex = 0; int groupingSize = 0; int decimalIndex = -1; int lastDigitIndex = -1; for (int i = 0; i < formatPicture.Length; i++) { char ch = formatPicture[i]; if (ch == decimalFormat.digit) { if (sawZeroDigit && integer) { throw XsltException.Create(Res.Xslt_InvalidFormat1, formatPicture); } lastDigitIndex = temp.Length; sawDigit = digitOrZeroDigit = true; temp.Append('#'); continue; } if (ch == decimalFormat.zeroDigit) { if (sawDigit && !integer) { throw XsltException.Create(Res.Xslt_InvalidFormat2, formatPicture); } lastDigitIndex = temp.Length; sawZeroDigit = digitOrZeroDigit = true; temp.Append('0'); continue; } if (ch == decimalFormat.patternSeparator) { if (!digitOrZeroDigit) { throw XsltException.Create(Res.Xslt_InvalidFormat8); } if (sawPattern) { throw XsltException.Create(Res.Xslt_InvalidFormat3, formatPicture); } sawPattern = true; if (decimalIndex < 0) { decimalIndex = lastDigitIndex + 1; } groupingSize = RemoveTrailingComma(temp, commaIndex, decimalIndex); if (groupingSize > 9) { groupingSize = 0; } posFormatInfo.NumberGroupSizes = new int[] { groupingSize }; if (!sawDecimalSeparator) { posFormatInfo.NumberDecimalDigits = 0; } posFormat = temp.ToString(); temp.Length = 0; decimalIndex = -1; lastDigitIndex = -1; commaIndex = 0; sawDigit = sawZeroDigit = digitOrZeroDigit = false; sawDecimalSeparator = false; integer = true; negFormatInfo = (NumberFormatInfo)decimalFormat.info.Clone(); negFormatInfo.NegativeSign = string.Empty; continue; } if (ch == decimalSeparator) { if (sawDecimalSeparator) { throw XsltException.Create(Res.Xslt_InvalidFormat5, formatPicture); } decimalIndex = temp.Length; sawDecimalSeparator = true; sawDigit = sawZeroDigit = integer = false; temp.Append('.'); continue; } if (ch == groupSeparator) { commaIndex = temp.Length; lastDigitIndex = commaIndex; temp.Append(','); continue; } if (ch == percentSymbol) { temp.Append('%'); continue; } if (ch == perMilleSymbol) { temp.Append('\u2030'); continue; } if (ch == '\'') { int pos = formatPicture.IndexOf('\'', i + 1); if (pos < 0) { pos = formatPicture.Length - 1; } temp.Append(formatPicture, i, pos - i + 1); i = pos; continue; } // Escape literal digits with EscChar, double literal EscChar if ('0' <= ch && ch <= '9' || ch == EscChar) { if (decimalFormat.zeroDigit != '0') { temp.Append(EscChar); } } // Escape characters having special meaning for CLR if (ClrSpecialChars.IndexOf(ch) >= 0) { temp.Append('\\'); } temp.Append(ch); } if (!digitOrZeroDigit) { throw XsltException.Create(Res.Xslt_InvalidFormat8); } NumberFormatInfo formatInfo = sawPattern ? negFormatInfo : posFormatInfo; if (decimalIndex < 0) { decimalIndex = lastDigitIndex + 1; } groupingSize = RemoveTrailingComma(temp, commaIndex, decimalIndex); if (groupingSize > 9) { groupingSize = 0; } formatInfo.NumberGroupSizes = new int[] { groupingSize }; if (!sawDecimalSeparator) { formatInfo.NumberDecimalDigits = 0; } if (sawPattern) { negFormat = temp.ToString(); } else { posFormat = temp.ToString(); } } private static int RemoveTrailingComma(StringBuilder builder, int commaIndex, int decimalIndex) { if (commaIndex > 0 && commaIndex == (decimalIndex - 1)) { builder.Remove(decimalIndex - 1, 1); } else if (decimalIndex > commaIndex) { return decimalIndex - commaIndex - 1; } return 0; } public string Format(double value) { NumberFormatInfo formatInfo; string subPicture; if (value < 0 && negFormatInfo != null) { formatInfo = this.negFormatInfo; subPicture = this.negFormat; } else { formatInfo = this.posFormatInfo; subPicture = this.posFormat; } string result = value.ToString(subPicture, formatInfo); if (this.zeroDigit != '0') { StringBuilder builder = new StringBuilder(result.Length); int shift = this.zeroDigit - '0'; for (int i = 0; i < result.Length; i++) { char ch = result[i]; if ((uint)(ch - '0') <= 9) { ch += (char)shift; } else if (ch == EscChar) { // This is an escaped literal digit or EscChar, thus unescape it. We make use // of the fact that no extra EscChar could be inserted by value.ToString(). Debug.Assert(i+1 < result.Length); ch = result[++i]; Debug.Assert('0' <= ch && ch <= '9' || ch == EscChar); } builder.Append(ch); } result = builder.ToString(); } return result; } public static string Format(double value, string formatPicture, DecimalFormat decimalFormat) { return new DecimalFormatter(formatPicture, decimalFormat).Format(value); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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