src/CsvReader.cs - master - leopotam/serialization.csv

src/CsvReader.cs
105 строк4 KB
Leopotam
[*] первая публичная версия.
06 сен 2025, 23:02
06 сен 2025, 23:0214f57d3
// ----------------------------------------------------------------------------
// Лицензия MIT-ZARYA
// (c) 2025 Leopotam <leopotam@yandex.ru>
// ----------------------------------------------------------------------------

using System.Collections.Generic;
#if ENABLE_IL2CPP
using System;
using Unity.IL2CPP.CompilerServices;
#endif

namespace Leopotam.Serialization.Csv {
#if ENABLE_IL2CPP
    [Il2CppSetOption (Option.NullChecks, false)]
    [Il2CppSetOption (Option.ArrayBoundsChecks, false)]
#endif
    public static class CsvReader {
        public static (Dictionary<string, string>, bool) ParseKeyedValues (string csv, bool normalizeNewLines) {
            var (parsedTable, ok) = ParseTable (csv, normalizeNewLines);
            if (!ok || (parsedTable.Count > 0 && parsedTable[0].Count < 2)) {
                return (default, false);
            }
            Dictionary<string, string> dict = new (parsedTable.Count);
            foreach (var line in parsedTable) {
                dict[line[0]] = line[1];
            }
            return (dict, true);
        }

        public static (Dictionary<string, List<string>>, bool) ParseKeyedLists (string csv, bool normalizeNewLines) {
            var (parsedTable, ok) = ParseTable (csv, normalizeNewLines);
            if (!ok || (parsedTable.Count > 0 && parsedTable[0].Count < 2)) {
                return (default, false);
            }
            Dictionary<string, List<string>> dict = new (parsedTable.Count);
            foreach (var line in parsedTable) {
                var key = line[0];
                line.RemoveAt (0);
                dict[key] = line;
            }
            return (dict, true);
        }

        public static (List<List<string>>, bool) ParseTable (string csv, bool normalizeNewLines) {
            List<List<string>> lines = new (32);
            List<string> line = new (8);
            var quotes = 0;
            var start = 0;
            var cols = -1;
            string val;
            char c;
            var len = csv.Length;
            for (var i = 0; i <= len; i++) {
                c = i < len ? csv[i] : '\n';
                if (c == '\"') { quotes++; }
                if ((c == ',' || c == '\n') && (quotes & 1) == 0) {
                    if (i > start) {
                        val = csv.Substring (start, i - start).Trim ();
                        if (normalizeNewLines) {
                            val = val.Replace ("\\n", "\n");
                        }
                        if (quotes > 0) {
                            val = val
                                .Substring (1, val.Length - 2)
                                .Replace ("\"\"", "\"");
                        }
                    } else {
                        val = "";
                    }
                    line.Add (val);
                    quotes = 0;
                    start = i + 1;
                    if (c == '\n') {
                        if (cols == -1) { cols = line.Count; }
                        if (cols != line.Count) {
                            return (default, false);
                        }
                        lines.Add (line);
                        if (i < len) {
                            line = new List<string> (cols);
                        }
                    }
                }
            }
            return quotes != 0 ? (default, false) : (lines, true);
        }
    }
}
#if ENABLE_IL2CPP
// Unity IL2CPP performance optimization attribute.
namespace Unity.IL2CPP.CompilerServices {
    enum Option {
        NullChecks = 1,
        ArrayBoundsChecks = 2
    }

    [AttributeUsage (AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
    class Il2CppSetOptionAttribute : Attribute {
        public Option Option { get; private set; }
        public object Value { get; private set; }

        public Il2CppSetOptionAttribute (Option option, object value) { Option = option; Value = value; }
    }
}
#endif