mirror of
https://github.com/kwsch/PKHeX
synced 2024-12-20 09:23:17 +00:00
e21d108fb2
All logic in PokeCrypto is separate from the rest of the PKHeX.Core library; makes it easy to just rip this portion out and reuse in other projects without needing the entirety of PKHeX.Core logic optimize out the CheckEncrypted to the actual path, separate methods. Only usages of this method were with hardcoded Format values, so no impact
284 lines
11 KiB
C#
284 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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namespace PKHeX.Core
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{
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/// <summary>
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/// Common logic for <see cref="PKM"/> data providing and manipulation.
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/// </summary>
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public static class PKX
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{
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internal static readonly PersonalTable Personal = PersonalTable.SWSH;
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public const int Generation = 8;
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private static readonly HashSet<int> Sizes = new HashSet<int>
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{
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PokeCrypto.SIZE_1JLIST, PokeCrypto.SIZE_1ULIST,
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PokeCrypto.SIZE_2ULIST, PokeCrypto.SIZE_2JLIST,
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PokeCrypto.SIZE_3STORED, PokeCrypto.SIZE_3PARTY,
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PokeCrypto.SIZE_3CSTORED, PokeCrypto.SIZE_3XSTORED,
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PokeCrypto.SIZE_4STORED, PokeCrypto.SIZE_4PARTY,
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PokeCrypto.SIZE_5PARTY,
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PokeCrypto.SIZE_6STORED, PokeCrypto.SIZE_6PARTY,
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PokeCrypto.SIZE_8STORED, PokeCrypto.SIZE_8PARTY,
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};
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/// <summary>
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/// Determines if the given length is valid for a <see cref="PKM"/>.
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/// </summary>
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/// <param name="len">Data length of the file/array.</param>
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/// <returns>A <see cref="bool"/> indicating whether or not the length is valid for a <see cref="PKM"/>.</returns>
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public static bool IsPKM(long len) => Sizes.Contains((int)len);
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/// <summary>
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/// Gets randomized EVs for a given generation format
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/// </summary>
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/// <param name="generation">Generation specific formatting option</param>
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/// <returns>Array containing randomized EVs (H/A/B/S/C/D)</returns>
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public static int[] GetRandomEVs(int generation = Generation)
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{
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if (generation > 2)
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{
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var evs = new int[6];
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do
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{
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int max = 510;
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int randomEV() => (byte)Math.Min(Util.Rand.Next(Math.Min(300, max)), 252);
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for (int i = 0; i < evs.Length - 1; i++)
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max -= evs[i] = randomEV();
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evs[5] = max;
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} while (evs[5] > 252);
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Util.Shuffle(evs);
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return evs;
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}
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else
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{
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var evs = new int[6];
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for (int i = 0; i < evs.Length; i++)
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evs[i] = Util.Rand.Next(ushort.MaxValue + 1);
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return evs;
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}
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}
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/// <summary>
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/// Translates a Gender string to Gender integer.
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/// </summary>
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/// <param name="s">Gender string</param>
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/// <returns>Gender integer</returns>
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public static int GetGenderFromString(string s)
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{
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if (s.Length != 1)
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return 2;
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switch (s[0])
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{
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case '♂': case 'M': return 0;
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case '♀': case 'F': return 1;
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default: return 2;
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}
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}
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/// <summary>
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/// Gets the nature modification values and checks if they are equal.
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/// </summary>
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/// <param name="nature">Nature</param>
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/// <param name="incr">Increased stat</param>
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/// <param name="decr">Decreased stat</param>
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/// <returns>True if nature modification values are equal or the Nature is out of range.</returns>
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public static bool GetNatureModification(int nature, out int incr, out int decr)
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{
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incr = (nature / 5) + 1;
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decr = (nature % 5) + 1;
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return incr == decr || nature >= 25; // invalid
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}
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/// <summary>
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/// Updates stats according to the specified nature.
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/// </summary>
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/// <param name="stats">Current stats to amplify if appropriate</param>
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/// <param name="nature">Nature</param>
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public static void ModifyStatsForNature(ushort[] stats, int nature)
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{
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if (GetNatureModification(nature, out int incr, out int decr))
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return;
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stats[incr] *= 11; stats[incr] /= 10;
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stats[decr] *= 9; stats[decr] /= 10;
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}
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/// <summary>
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/// Gets a random PID according to specifications.
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/// </summary>
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/// <param name="species">National Dex ID</param>
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/// <param name="cg">Current Gender</param>
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/// <param name="origin">Origin Generation</param>
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/// <param name="nature">Nature</param>
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/// <param name="form">AltForm</param>
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/// <param name="OLDPID">Current PID</param>
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/// <remarks>Used to retain ability bits.</remarks>
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/// <returns>Rerolled PID.</returns>
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public static uint GetRandomPID(int species, int cg, int origin, int nature, int form, uint OLDPID)
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{
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uint bits = OLDPID & 0x00010001;
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int gt = Personal[species].Gender;
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if (origin >= 24)
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return Util.Rand32();
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bool g3unown = origin <= 5 && species == (int)Species.Unown;
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while (true) // Loop until we find a suitable PID
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{
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uint pid = Util.Rand32();
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// Gen 3/4: Nature derived from PID
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if (origin <= 15 && pid%25 != nature)
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continue;
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// Gen 3 Unown: Letter/form derived from PID
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if (g3unown)
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{
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var pidLetter = GetUnownForm(pid);
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if (pidLetter != form)
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continue;
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}
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else if (bits != (pid & 0x00010001)) // keep ability bits
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{
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continue;
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}
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if (gt == 255 || gt == 254 || gt == 0) // Set Gender(less)
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return pid; // PID can be anything
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// Gen 3/4/5: Gender derived from PID
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if (cg == GetGenderFromPIDAndRatio(pid, gt))
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return pid;
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}
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}
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/// <summary>
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/// Gets the Unown Forme ID from PID.
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/// </summary>
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/// <param name="pid">Personality ID</param>
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/// <remarks>Should only be used for 3rd Generation origin specimens.</remarks>
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/// <returns></returns>
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public static int GetUnownForm(uint pid)
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{
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var val = (pid & 0x3000000) >> 18 | (pid & 0x30000) >> 12 | (pid & 0x300) >> 6 | (pid & 0x3);
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return (int)(val % 28);
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}
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/// <summary>
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/// Gets the gender ID of the species based on the Personality ID.
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/// </summary>
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/// <param name="species">National Dex ID.</param>
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/// <param name="PID">Personality ID.</param>
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/// <returns>Gender ID (0/1/2)</returns>
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/// <remarks>This method should only be used for Generations 3-5 origin.</remarks>
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public static int GetGenderFromPID(int species, uint PID)
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{
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int gt = Personal[species].Gender;
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return GetGenderFromPIDAndRatio(PID, gt);
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}
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public static int GetGenderFromPIDAndRatio(uint PID, int gr)
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{
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return gr switch
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{
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255 => 2,
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254 => 1,
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0 => 0,
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_ => ((PID & 0xFF) < gr ? 1 : 0)
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};
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}
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/// <summary>
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/// Gets an array of valid <see cref="PKM"/> file extensions.
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/// </summary>
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/// <param name="maxGeneration">Maximum Generation to permit</param>
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/// <returns>Valid <see cref="PKM"/> file extensions.</returns>
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public static string[] GetPKMExtensions(int maxGeneration = Generation)
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{
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var result = new List<string>();
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int min = maxGeneration <= 2 || maxGeneration >= 7 ? 1 : 3;
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for (int i = min; i <= maxGeneration; i++)
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result.Add($"pk{i}");
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if (maxGeneration >= 3)
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{
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result.Add("ck3"); // colosseum
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result.Add("xk3"); // xd
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}
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if (maxGeneration >= 4)
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result.Add("bk4"); // battle revolution
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if (maxGeneration >= 7)
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result.Add("pb7"); // let's go
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return result.ToArray();
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}
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/// <summary>
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/// Roughly detects the PKM format from the file's extension.
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/// </summary>
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/// <param name="ext">File extension.</param>
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/// <param name="prefer">Preference if not a valid extension, usually the highest acceptable format.</param>
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/// <returns>Format hint that the file is.</returns>
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public static int GetPKMFormatFromExtension(string ext, int prefer)
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{
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if (string.IsNullOrEmpty(ext))
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return prefer;
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return GetPKMFormatFromExtension(ext[ext.Length - 1], prefer);
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}
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/// <summary>
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/// Roughly detects the PKM format from the file's extension.
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/// </summary>
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/// <param name="last">Last character of the file's extension.</param>
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/// <param name="prefer">Preference if not a valid extension, usually the highest acceptable format.</param>
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/// <returns>Format hint that the file is.</returns>
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public static int GetPKMFormatFromExtension(char last, int prefer)
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{
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if ('1' <= last && last <= '9')
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return last - '0';
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return last == 'x' ? 6 : prefer;
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}
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internal static bool IsPKMPresentGB(byte[] data, int offset) => data[offset] != 0;
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internal static bool IsPKMPresentGC(byte[] data, int offset) => BitConverter.ToUInt16(data, offset) != 0;
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internal static bool IsPKMPresentGBA(byte[] data, int offset) => (data[offset + 0x13] & 0xFB) == 2; // ignore egg flag, must be FlagHasSpecies.
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internal static bool IsPKMPresent(byte[] data, int offset)
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{
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if (BitConverter.ToUInt32(data, offset) != 0) // PID
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return true;
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ushort species = BitConverter.ToUInt16(data, offset + 8);
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return species != 0;
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}
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/// <summary>
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/// Gets a function that can check a byte array (at an offset) to see if a <see cref="PKM"/> is possibly present.
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/// </summary>
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/// <param name="blank"></param>
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/// <returns>Function that checks if a byte array (at an offset) has a <see cref="PKM"/> present</returns>
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public static Func<byte[], int, bool> GetFuncIsPKMPresent(PKM blank)
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{
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if (blank.Format >= 4)
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return IsPKMPresent;
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if (blank.Format <= 2)
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return IsPKMPresentGB;
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if (blank.Data.Length <= PokeCrypto.SIZE_3PARTY)
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return IsPKMPresentGBA;
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return IsPKMPresentGC;
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}
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/// <summary>
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/// Reorders (in place) the input array of stats to have the Speed value last rather than before the SpA/SpD stats.
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/// </summary>
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/// <param name="value">Input array to reorder</param>
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/// <returns>Same array, reordered.</returns>
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public static int[] ReorderSpeedLast(int[] value)
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{
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var spe = value[3];
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value[3] = value[4];
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value[4] = value[5];
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value[5] = spe;
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return value;
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}
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}
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}
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