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209
iTechSharp/System/util/Properties.cs
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209
iTechSharp/System/util/Properties.cs
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using System;
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using System.Text;
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using System.IO;
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using System.Collections;
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namespace System.util
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{
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/// <summary>
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/// Summary description for Properties.
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/// </summary>
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public class Properties
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{
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private Hashtable _col;
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private const string whiteSpaceChars = " \t\r\n\f";
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private const string keyValueSeparators = "=: \t\r\n\f";
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private const string strictKeyValueSeparators = "=:";
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public Properties()
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{
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_col = new Hashtable();
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}
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public string Remove(string key) {
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string retval = (string)_col[key];
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_col.Remove(key);
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return retval;
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}
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public IEnumerator GetEnumerator() {
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return _col.GetEnumerator();
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}
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public bool ContainsKey(string key) {
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return _col.ContainsKey(key);
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}
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public virtual void Add(string key, string value) {
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_col[key] = value;
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}
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public void AddAll(Properties col) {
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foreach (string itm in col.Keys) {
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_col[itm] = col[itm];
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}
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}
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public int Count {
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get {
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return _col.Count;
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}
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}
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public virtual string this[string key] {
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get {
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return (string)_col[key];
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}
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set {
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_col[key] = value;
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}
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}
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public ICollection Keys {
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get {
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return _col.Keys;
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}
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}
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public void Clear() {
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_col.Clear();
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}
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public void Load(Stream inStream) {
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StreamReader inp = new StreamReader(inStream, Encoding.GetEncoding(1252));
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while (true) {
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// Get next line
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String line = inp.ReadLine();
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if (line == null)
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return;
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if (line.Length > 0) {
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// Find start of key
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int len = line.Length;
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int keyStart;
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for (keyStart=0; keyStart<len; keyStart++)
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if (whiteSpaceChars.IndexOf(line[keyStart]) == -1)
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break;
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// Blank lines are ignored
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if (keyStart == len)
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continue;
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// Continue lines that end in slashes if they are not comments
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char firstChar = line[keyStart];
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if ((firstChar != '#') && (firstChar != '!')) {
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while (ContinueLine(line)) {
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String nextLine = inp.ReadLine();
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if (nextLine == null)
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nextLine = "";
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String loppedLine = line.Substring(0, len-1);
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// Advance beyond whitespace on new line
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int startIndex;
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for (startIndex=0; startIndex<nextLine.Length; startIndex++)
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if (whiteSpaceChars.IndexOf(nextLine[startIndex]) == -1)
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break;
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nextLine = nextLine.Substring(startIndex,nextLine.Length - startIndex);
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line = loppedLine+nextLine;
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len = line.Length;
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}
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// Find separation between key and value
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int separatorIndex;
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for (separatorIndex=keyStart; separatorIndex<len; separatorIndex++) {
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char currentChar = line[separatorIndex];
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if (currentChar == '\\')
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separatorIndex++;
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else if (keyValueSeparators.IndexOf(currentChar) != -1)
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break;
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}
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// Skip over whitespace after key if any
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int valueIndex;
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for (valueIndex=separatorIndex; valueIndex<len; valueIndex++)
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if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1)
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break;
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// Skip over one non whitespace key value separators if any
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if (valueIndex < len)
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if (strictKeyValueSeparators.IndexOf(line[valueIndex]) != -1)
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valueIndex++;
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// Skip over white space after other separators if any
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while (valueIndex < len) {
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if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1)
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break;
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valueIndex++;
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}
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String key = line.Substring(keyStart, separatorIndex - keyStart);
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String value = (separatorIndex < len) ? line.Substring(valueIndex, len - valueIndex) : "";
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// Convert then store key and value
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key = LoadConvert(key);
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value = LoadConvert(value);
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Add(key, value);
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}
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}
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}
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}
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/*
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* Converts encoded \uxxxx to unicode chars
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* and changes special saved chars to their original forms
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*/
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private String LoadConvert(String theString) {
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char aChar;
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int len = theString.Length;
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StringBuilder outBuffer = new StringBuilder(len);
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for (int x=0; x<len; ) {
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aChar = theString[x++];
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if (aChar == '\\') {
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aChar = theString[x++];
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if (aChar == 'u') {
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// Read the xxxx
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int value=0;
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for (int i=0; i<4; i++) {
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aChar = theString[x++];
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switch (aChar) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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value = (value << 4) + aChar - '0';
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break;
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case 'a': case 'b': case 'c':
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case 'd': case 'e': case 'f':
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value = (value << 4) + 10 + aChar - 'a';
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break;
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case 'A': case 'B': case 'C':
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case 'D': case 'E': case 'F':
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value = (value << 4) + 10 + aChar - 'A';
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break;
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default:
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throw new ArgumentException(
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"Malformed \\uxxxx encoding.");
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}
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}
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outBuffer.Append((char)value);
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} else {
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if (aChar == 't') aChar = '\t';
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else if (aChar == 'r') aChar = '\r';
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else if (aChar == 'n') aChar = '\n';
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else if (aChar == 'f') aChar = '\f';
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outBuffer.Append(aChar);
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}
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} else
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outBuffer.Append(aChar);
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}
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return outBuffer.ToString();
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}
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private bool ContinueLine(String line) {
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int slashCount = 0;
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int index = line.Length - 1;
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while ((index >= 0) && (line[index--] == '\\'))
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slashCount++;
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return (slashCount % 2 == 1);
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}
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}
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}
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