93 lines
2.3 KiB
C#
93 lines
2.3 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="JavaScriptString.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.Script.Serialization {
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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using System.Text;
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internal class JavaScriptString {
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private string _s;
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private int _index;
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internal JavaScriptString(string s) {
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_s = s;
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}
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internal Nullable<char> GetNextNonEmptyChar() {
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while (_s.Length > _index) {
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char c = _s[_index++];
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if (!Char.IsWhiteSpace(c)) {
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return c;
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}
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}
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return null;
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}
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internal Nullable<char> MoveNext() {
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if (_s.Length > _index) {
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return _s[_index++];
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}
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return null;
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}
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internal string MoveNext(int count) {
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if (_s.Length >= _index + count) {
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string result = _s.Substring(_index, count);
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_index += count;
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return result;
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}
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return null;
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}
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internal void MovePrev() {
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if (_index > 0) {
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_index--;
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}
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}
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internal void MovePrev(int count) {
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while (_index > 0 && count > 0) {
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_index--;
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count--;
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}
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}
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public override string ToString() {
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if (_s.Length > _index) {
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return _s.Substring(_index);
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}
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return String.Empty;
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}
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internal string GetDebugString(string message) {
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return message + " (" + _index + "): " + _s;
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}
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internal int IndexOf(string substr) {
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if (_s.Length > _index) {
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return _s.IndexOf(substr, _index, StringComparison.CurrentCulture) - _index;
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}
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return -1;
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}
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internal string Substring(int length) {
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if (_s.Length > _index + length) {
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return _s.Substring(_index, length);
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}
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return ToString();
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}
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}
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}
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