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Add CFG-parser
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MathiasL
parent
4e450fc921
commit
e39bbcc61d
6 changed files with 258 additions and 17 deletions
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@ -12,6 +12,176 @@ namespace SteamShared.SourceConfig
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/// <summary>
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/// Gets or sets a list of concommands or convars in this CFG-file.
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/// </summary>
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public List<SourceCFGCommand> Commands { get; set; }
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public List<SourceCFGCommand>? Commands { get; set; }
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public static SourceCFG? FromFile(string path)
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{
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if (!File.Exists(path))
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{
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return null;
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}
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var config = new SourceCFG();
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var commands = new List<SourceCFGCommand>();
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using (var fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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fs.Position = 0;
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int curByte;
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int nextByte = 0x20; // Placeholder value
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char curChar = ' ';
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char nextChar;
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bool wasInQuoted = false;
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bool inQuoted = false;
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bool inComment = false;
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bool cmdNameParsed = false;
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bool endOfFile = false;
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while (true)
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{
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// Start of the file and every new command or line (after line break or unquoted semicolon)
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var cmd = new SourceCFGCommand();
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StringBuilder cmdString = new StringBuilder();
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StringBuilder valueString = new StringBuilder();
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if (endOfFile)
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// end of stream
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break;
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while (true)
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{
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// in this loop breaking means going into next line or next command
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// continuing means going to next character
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// READ NEXT CHAR
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curByte = nextByte < 0 ? -1 : fs.ReadByte();
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try
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{
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curChar = Convert.ToChar(curByte);
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}
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catch
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{ }
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nextByte = fs.ReadByte();
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// Since we just sneakily peeked a byte, move it back a notch
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if (fs.Position > 0)
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fs.Position--;
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else
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{
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// File is probably empty, because the first ReadByte didn't advance the stream position
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endOfFile = true;
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break;
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}
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try
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{
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nextChar = Convert.ToChar(nextByte);
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}
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catch
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{
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// Probably end of file after this one (AFAIK mostly negative numbers can't be parsed so it should be end of stream)
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nextChar = ' ';
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}
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// PARSE NEXT CHAR... man I could've used regexes or some shit but nvm
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if (inComment && !isEndOfLine(curChar, nextChar))
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// Ends of lines come before this because those are the only ones that cannot be commented out
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continue;
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if (curByte < 1 || curChar == '\"' || (curChar == ';' || char.IsWhiteSpace(curChar) && !inQuoted) || isEndOfLine(curChar, nextChar))
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{
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// Newlines are also whitespace
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// We've reached end of line, a gap between commands or just padding, a quote or the end of command, always break at newlines or semis
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// We might be at the first unquoted space after a command as well, this would mean... oh yeah! we finally finished fetching that command name!
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cmdNameParsed = true;
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wasInQuoted = false;
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if (curChar == '\"')
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{
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// Toggle quoted and continue with next character
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wasInQuoted = inQuoted;
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inQuoted = !inQuoted;
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}
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// Create and save current value, if quoted or not empty
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if (curByte < 1 || wasInQuoted || !string.IsNullOrWhiteSpace(valueString.ToString()))
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{
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if (cmd.CommandValues == null)
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// Only create it if there are values, otherwise it will be null, for example when executing commands that have no values
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cmd.CommandValues = new List<SourceCFGCommandValue>();
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var newVal = new SourceCFGCommandValue();
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newVal.Value = valueString.ToString();
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cmd.CommandValues.Add(newVal);
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valueString.Clear();
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if (curByte < 1)
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{
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// end of stream or null byte
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endOfFile = true;
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break;
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}
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}
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if (curChar == ';' || isEndOfLine(curChar, nextChar))
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{
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if (isEndOfLine(curChar, nextChar) && curChar == '\r')
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// Windows-Style line breaks need an extra character, so skip that one
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fs.Position++;
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// is line break or unquoted semicolon so go to next line,
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// if it was just a different whitespace, leave it be
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break;
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}
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// oh it was a different white space or a quote... so just skip it ig lmao
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continue;
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}
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if (!inQuoted && curChar == '/' && nextChar == '/')
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{
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// We've encountered the beginning of a comment (double slashes inside of quoted values are allowed I guess)
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inComment = true;
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continue;
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}
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if (cmdNameParsed)
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// We already have the command or convar, so just assume everything else is a value
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valueString.Append(curChar);
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else
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// We still at the beginning of the line bro, awesome!
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cmdString.Append(curChar);
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}
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// Here is the end of line or command separated by newlines or semicolons (It's late and I've misspelt this thrice)
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// Just save the command name, the values should've been added already in zhe process of life Bruder
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cmd.CommandName = cmdString.ToString();
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cmdString.Clear(); // Prepare for next line, make it tidy and clean like a baby's bottom :)
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if (!string.IsNullOrWhiteSpace(cmd.CommandName))
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{
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commands.Add(cmd);
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}
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inQuoted = false; // In case quotes were forgotten but end of line has been reached, just make sure. In the ideal case this should already be false
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inComment = false; // We don't want to ignore everything in the file, only everything in that line
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cmdNameParsed = false; // Next line will probably have another command so prepare dinner here ;)
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}
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}
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config.Commands = commands;
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return config;
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}
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private static bool isEndOfLine(char curChar, char nextChar)
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{
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return curChar == '\n' || (curChar == '\r' && nextChar == '\n');
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}
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}
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}
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@ -6,7 +6,7 @@ using System.Threading.Tasks;
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namespace SteamShared.SourceConfig
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{
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public class SourceCFGCommand : SourceCFGCommandBase
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public class SourceCFGCommand
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{
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public string? CommandName { get; set; }
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@ -14,6 +14,19 @@ namespace SteamShared.SourceConfig
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/// Gets or sets the values of this command.
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/// This can be a value or another command, for example when using the 'alias' command.
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/// </summary>
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public List<SourceCFGCommandBase> CommandValues { get; set; }
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public List<SourceCFGCommandValue>? CommandValues { get; set; }
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/// <summary>
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/// Gets all values joined with spaces,
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/// use for example when having an echo command with multiple words that's missing quotes
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/// </summary>
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/// <returns></returns>
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public string? GetValuesAsOne()
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{
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if (this.CommandValues == null || this.CommandValues.Count < 1)
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return null;
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return string.Join(' ', this.CommandValues.Select(val => val.Value));
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}
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}
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}
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@ -1,12 +0,0 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SteamShared.SourceConfig
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{
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public class SourceCFGCommandBase
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{
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}
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}
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@ -6,8 +6,68 @@ using System.Threading.Tasks;
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namespace SteamShared.SourceConfig
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{
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public class SourceCFGCommandValue : SourceCFGCommandBase
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public class SourceCFGCommandValue
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{
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public string? Value { get; set; }
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public int? GetInt()
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{
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if (int.TryParse(this.Value, out int parsed))
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return parsed;
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else
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return null;
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}
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public float? GetFloat()
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{
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if (float.TryParse(this.Value, out float parsed))
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return parsed;
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else
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return null;
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}
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public List<int?>? GetInts()
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{
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if (this.Value == null)
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return null;
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var res = new List<int?>();
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string[] values = this.Value.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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for(int i = 0; i < values.Length; i++)
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{
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if(int.TryParse(values[i], out int parsed))
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{
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res.Add(parsed);
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}
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}
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if(res.Count > 0)
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return res;
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return null;
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}
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public List<float?>? GetFloats()
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{
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if (this.Value == null)
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return null;
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var res = new List<float?>();
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string[] values = this.Value.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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for (int i = 0; i < values.Length; i++)
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{
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if (float.TryParse(values[i], out float parsed))
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{
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res.Add(parsed);
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}
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}
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if (res.Count > 0)
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return res;
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return null;
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}
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}
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}
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@ -4,4 +4,9 @@ test_command
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// some comment
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test_command2; test_command3 // another comment
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test_cvar "test_cvar4 8; test_cvar5 9";test_command
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//test comment
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//test comment
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// first, set flags like inQuoted and incomment correctly
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// semicolon OR end line if \n or \r\n and in latter case advance stream position an extra byte
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// if a different whitespace and not inQuoted just skip it
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// if cmdString for command already fetched, and we have non-blank values, or were quoted up until now, add it to a new valuestring, otherwise add it to the cmdString
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@ -13,5 +13,10 @@
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<ItemGroup>
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<PackageReference Include="System.Drawing.Common" Version="6.0.0" />
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</ItemGroup>
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<ItemGroup>
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<None Update="SourceConfig\test_source.cfg">
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<CopyToOutputDirectory>Never</CopyToOutputDirectory>
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</None>
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</ItemGroup>
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</Project>
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