add random stuffs

Nbt.cs

@@ -0,0 +1,401 @@
+// an implementation of nbt format reader/writer
+// NBTFile only supports .ToBytes() and .FromBytes() methods because i am lazy to do others
+// not sure does it actually work i tested it last time like 4 months ago
+
+namespace Nbt;
+
+public enum CompressionType {
+    GZipCompressed = 1,
+    ZLibCompressed = 2,
+    Uncompressed = 3
+}
+
+internal class BinaryReader2(Stream stream) : BinaryReader(stream, System.Text.Encoding.UTF8, true) {
+    private Span<byte> ReadBytesReversed(int count) {
+        var data = base.ReadBytes(count);
+        Array.Reverse(data);
+        return new Span<byte>(data);
+    }
+    public override short ReadInt16() {
+        return BitConverter.ToInt16(ReadBytesReversed(2));
+    }
+
+    public override ushort ReadUInt16() {
+        return BitConverter.ToUInt16(ReadBytesReversed(2));
+    }
+
+    public uint ReadUInt24() {
+        return (uint)ReadByte() << 16 | (uint)ReadByte() << 8 | ReadByte();
+    }
+
+    public override uint ReadUInt32() {
+        return BitConverter.ToUInt32(ReadBytesReversed(4));
+    }
+
+    public override int ReadInt32() {
+        return BitConverter.ToInt32(ReadBytesReversed(4));
+    }
+
+    public override long ReadInt64() {
+        return BitConverter.ToInt64(ReadBytesReversed(8));
+    }
+
+    public override float ReadSingle() {
+        return BitConverter.ToSingle(ReadBytesReversed(4));
+    }
+
+    public override double ReadDouble() {
+        return BitConverter.ToDouble(ReadBytesReversed(8));
+    }
+}
+
+internal class BinaryWriter2(Stream stream) : BinaryWriter(stream) {
+    public override void Write(short value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public override void Write(ushort value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public void WriteUInt24(uint value) {
+        Write((byte)value);
+        Write((byte)(value >> 8));
+        Write((byte)(value >> 16));
+    }
+
+    public override void Write(uint value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public override void Write(int value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public override void Write(long value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public override void Write(float value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+
+    public override void Write(double value) {
+        var data = BitConverter.GetBytes(value);
+        Array.Reverse(data);
+        base.Write(data);
+    }
+}
+
+public enum TAG_ID : byte {
+    TAG_End,
+    TAG_Byte,
+    TAG_Short,
+    TAG_Int,
+    TAG_Long,
+    TAG_Float,
+    TAG_Double,
+    TAG_Byte_Array,
+    TAG_String,
+    TAG_List,
+    TAG_Compound,
+    TAG_Int_Array,
+    TAG_Long_Array
+}
+
+public interface ITag {
+    TAG_ID Id { get; }
+    string Name { get; }
+}
+
+public abstract class TAG<T>(string name, T value) : ITag {
+    public abstract TAG_ID Id { get; }
+    public string Name { get; set; } = name;
+    public T Value { get; } = value;
+}
+
+public abstract class TAG_Array<T>(string name, List<T> value) : TAG<List<T>>(name, value), IList<T> {
+    public void Add(T item) => Value.Add(item);
+    public void Clear() => Value.Clear();
+    public bool Contains(T item) => Value.Contains(item);
+    public void CopyTo(T[] array, int arrayIndex) => Value.CopyTo(array, arrayIndex);
+    public int Count => Value.Count;
+    public bool IsReadOnly => false;
+    public bool Remove(T item) => Value.Remove(item);
+    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() => Value.GetEnumerator();
+    public int IndexOf(T item) => Value.IndexOf(item);
+    public IEnumerator<T> GetEnumerator() => Value.GetEnumerator();
+    public void Insert(int index, T item) => Value.Insert(index, item);
+    public void RemoveAt(int index) => Value.RemoveAt(index);
+    public T this[int index] {
+        get => Value[index];
+        set => Value[index] = value;
+    }
+}
+
+public class TAG_End() : TAG<object?>("", null) {
+    public override TAG_ID Id => TAG_ID.TAG_End;
+}
+
+public class TAG_Byte(string name, byte value) : TAG<byte>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Byte;
+}
+
+public class TAG_Short(string name, short value) : TAG<short>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Short;
+}
+
+public class TAG_Int(string name, int value) : TAG<int>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Int;
+}
+
+public class TAG_Long(string name, long value) : TAG<long>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Long;
+}
+
+public class TAG_Float(string name, float value) : TAG<float>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Float;
+}
+
+public class TAG_Double(string name, double value) : TAG<double>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Double;
+}
+
+public class TAG_Byte_Array(string name, List<sbyte> value) : TAG_Array<sbyte>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Byte_Array;
+}
+
+public class TAG_String(string name, string value) : TAG<string>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_String;
+}
+
+public class TAG_List(string name, List<ITag> value, TAG_ID tagsId) : TAG_Array<ITag>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_List;
+    public TAG_ID tagsId = tagsId;
+}
+
+public class TAG_Compound(string name, List<ITag> value) : TAG_Array<ITag>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Compound;
+}
+
+public class TAG_Int_Array(string name, List<int> value) : TAG_Array<int>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Int_Array;
+}
+
+public class TAG_Long_Array(string name, List<long> value) : TAG_Array<long>(name, value) {
+    public override TAG_ID Id => TAG_ID.TAG_Long_Array;
+}
+
+public class NBTFile(string name, List<ITag> value) : TAG_Compound(name, value) {
+    private static string ReadString(BinaryReader2 reader) {
+        ushort length = reader.ReadUInt16();
+        string s = System.Text.Encoding.UTF8.GetString(reader.ReadBytes(length));
+        return s;
+    }
+
+    private static TAG_List ReadList(string name, BinaryReader2 reader) {
+        TAG_ID id = (TAG_ID)reader.ReadByte();
+        int length = reader.ReadInt32();
+        var list = new List<ITag>(length);
+
+        for (int i = 0; i < length; i++)
+            list.Add(ReadTag(id, "", reader));
+
+        return new TAG_List(name, list, id);
+    }
+
+    private static TAG_Compound ReadCompound(string name, BinaryReader2 reader) {
+        List<ITag> tags = [];
+        while (true) {
+            ITag tag = ReadTagWithPrefix(reader);
+            if (tag.Id == TAG_ID.TAG_End) break;
+            tags.Add(tag);
+        }
+        return new TAG_Compound(name, tags);
+    }
+
+    private static TAG_Byte_Array ReadByteArray(string name, BinaryReader2 reader) {
+        int length = reader.ReadInt32();
+        var list = new List<sbyte>(length);
+
+        for (int i = 0; i < length; i++)
+            list.Add(reader.ReadSByte());
+
+        return new TAG_Byte_Array(name, list);
+    }
+
+    private static TAG_Int_Array ReadIntArray(string name, BinaryReader2 reader) {
+        int length = reader.ReadInt32();
+        var list = new List<int>(length);
+
+        for (int i = 0; i < length; i++)
+            list.Add(reader.ReadInt32());
+
+        return new TAG_Int_Array(name, list);
+    }
+
+    private static TAG_Long_Array ReadLongArray(string name, BinaryReader2 reader) {
+        int length = reader.ReadInt32();
+        var list = new List<long>(length);
+
+        for (int i = 0; i < length; i++) {
+            list.Add(reader.ReadInt64());
+        }
+
+        return new TAG_Long_Array(name, list);
+    }
+
+    private static ITag ReadTag(TAG_ID id, string name, BinaryReader2 reader) => id switch {
+        TAG_ID.TAG_End => new TAG_End(),
+        TAG_ID.TAG_Byte => new TAG_Byte(name, reader.ReadByte()),
+        TAG_ID.TAG_Short => new TAG_Short(name, reader.ReadInt16()),
+        TAG_ID.TAG_Int => new TAG_Int(name, reader.ReadInt32()),
+        TAG_ID.TAG_Long => new TAG_Long(name, reader.ReadInt64()),
+        TAG_ID.TAG_Float => new TAG_Float(name, reader.ReadSingle()),
+        TAG_ID.TAG_Double => new TAG_Double(name, reader.ReadDouble()),
+        TAG_ID.TAG_Byte_Array => ReadByteArray(name, reader),
+        TAG_ID.TAG_String => new TAG_String(name, ReadString(reader)),
+        TAG_ID.TAG_List => ReadList(name, reader),
+        TAG_ID.TAG_Compound => ReadCompound(name, reader),
+        TAG_ID.TAG_Int_Array => ReadIntArray(name, reader),
+        TAG_ID.TAG_Long_Array => ReadLongArray(name, reader),
+        _ => throw new NotSupportedException($"Unknown tag type: {id}"),
+    };
+
+    private static ITag ReadTagWithPrefix(BinaryReader2 reader) {
+        TAG_ID id = (TAG_ID)reader.ReadByte();
+        string name = id == TAG_ID.TAG_End ? "" : ReadString(reader);
+        return ReadTag(id, name, reader);
+    }
+
+    private static NBTFile FromReader(BinaryReader2 reader) {
+        var tags = ReadTagWithPrefix(reader);
+        if (tags.Id == TAG_ID.TAG_Compound) return new NBTFile(tags.Name, ((TAG_Compound)tags).Value);
+        throw new FormatException("The file is not TAG_Compound.");
+    }
+
+    public static NBTFile FromBytes(byte[] bytes) => FromReader(new BinaryReader2(bytes[0] switch {
+        0x0A => new MemoryStream(bytes),
+        0x1F when bytes[1] == 0x8B => new System.IO.Compression.GZipStream(new MemoryStream(bytes), System.IO.Compression.CompressionMode.Decompress),
+        0x78 when bytes[1] == 0x9C || bytes[1] == 0xDA => new System.IO.Compression.ZLibStream(new MemoryStream(bytes), System.IO.Compression.CompressionMode.Decompress),
+        _ => throw new FormatException("Unknown compression type.")
+    }));
+
+    private static void WriteString(string s, BinaryWriter2 writer) {
+        byte[] bytes = System.Text.Encoding.UTF8.GetBytes(s);
+        writer.Write((ushort)bytes.Length);
+        writer.Write(bytes);
+    }
+
+    private static void WriteList(TAG_List list, BinaryWriter2 writer) {
+        writer.Write((byte)list.tagsId);
+        writer.Write(list.Count);
+
+        foreach (ITag tag in list) {
+            if (tag.Id != list.tagsId)
+                throw new ArgumentException($"Expected {list.tagsId} in TAG_List, not {tag.Id}");
+            WriteTag(tag, writer);
+        }
+    }
+
+    private static void WriteCompound(TAG_Compound compound, BinaryWriter2 writer) {
+        foreach (ITag tag in compound)
+            WriteTagWithPrefix(tag, writer);
+        writer.Write((byte)TAG_ID.TAG_End);
+    }
+
+    private static void WriteByteArray(TAG_Byte_Array byteArray, BinaryWriter2 writer) {
+        writer.Write(byteArray.Count);
+        
+        foreach (sbyte b in byteArray)
+            writer.Write(b);
+    }
+
+    private static void WriteIntArray(TAG_Int_Array intArray, BinaryWriter2 writer) {
+        writer.Write(intArray.Count);
+
+        foreach (int i in intArray) {
+            writer.Write(i);
+        }
+    }
+
+    private static void WriteLongArray(TAG_Long_Array longArray, BinaryWriter2 writer) {
+        writer.Write(longArray.Count);
+
+        foreach (long l in longArray)
+            writer.Write(l);
+    }
+
+    private static void WriteTag(ITag tag, BinaryWriter2 writer) {
+        switch (tag.Id) {
+            case TAG_ID.TAG_Byte:
+                writer.Write(((TAG_Byte)tag).Value);
+                break;
+            case TAG_ID.TAG_Short:
+                writer.Write(((TAG_Short)tag).Value);
+                break;
+            case TAG_ID.TAG_Int:
+                writer.Write(((TAG_Int)tag).Value);
+                break;
+            case TAG_ID.TAG_Long:
+                writer.Write(((TAG_Long)tag).Value);
+                break;
+            case TAG_ID.TAG_Float:
+                writer.Write(((TAG_Float)tag).Value);
+                break;
+            case TAG_ID.TAG_Double:
+                writer.Write(((TAG_Double)tag).Value);
+                break;
+            case TAG_ID.TAG_Byte_Array:
+                WriteByteArray((TAG_Byte_Array)tag, writer);
+                break;
+            case TAG_ID.TAG_String:
+                WriteString(((TAG_String)tag).Value, writer);
+                break;
+            case TAG_ID.TAG_List:
+                WriteList((TAG_List)tag, writer);
+                break;
+            case TAG_ID.TAG_Compound:
+                WriteCompound((TAG_Compound)tag, writer);
+                break;
+            case TAG_ID.TAG_Int_Array:
+                WriteIntArray((TAG_Int_Array)tag, writer);
+                break;
+            case TAG_ID.TAG_Long_Array:
+                WriteLongArray((TAG_Long_Array)tag, writer);
+                break;
+            case TAG_ID.TAG_End:
+            default:
+                throw new NotSupportedException($"Unknown tag type: {tag.Id}");
+        }
+    }
+
+    private static void WriteTagWithPrefix(ITag tag, BinaryWriter2 writer) {
+        writer.Write((byte)tag.Id);
+        WriteString(tag.Name, writer);
+        WriteTag(tag, writer);
+    }
+
+    public byte[] ToBytes(CompressionType compression = CompressionType.GZipCompressed) {
+        MemoryStream memoryStream = new();
+        WriteTagWithPrefix(this, new BinaryWriter2(compression switch {
+            CompressionType.Uncompressed => memoryStream,
+            CompressionType.GZipCompressed => new System.IO.Compression.GZipStream(memoryStream, System.IO.Compression.CompressionMode.Compress),
+            CompressionType.ZLibCompressed => new System.IO.Compression.ZLibStream(memoryStream, System.IO.Compression.CompressionMode.Compress),
+            _ => throw new ArgumentOutOfRangeException(nameof(compression), compression, null)
+        }));
+        return memoryStream.ToArray();
+    }
+}

README.md

@@ -1 +1,2 @@
-their know our secrets
+their know our secrets
+

audiosort.c

@@ -0,0 +1,123 @@
+// gcc audiosort.c -o audiosort -O3
+// this for me so i don't lose later:
+// gcc audiosort.c -o audiosort -O0 -Wall -Wextra -Werror -Wno-unused-result
+// requires ffmpeg
+// ./audiosort <input_file> <output_file>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define BUFFER_SIZE 4800
+#define conststrlen(s) ((sizeof(s))-1)
+typedef short sample_t;
+
+static void* safe_malloc(const size_t bytes) {
+    void* ptr = malloc(bytes);
+    if (ptr == NULL) exit(1);
+    return ptr;
+}
+
+#define put_some_shit(text) do { \
+    memcpy(ptr, text, conststrlen(text)); \
+    ptr += conststrlen(text); \
+} while (0)
+
+#define put_SINGLE_shit(c) do { \
+    *ptr++ = c; \
+} while (0)
+
+
+static FILE* get_input_pipe(const char* filename) {
+    size_t len = conststrlen("ffmpeg -i") + conststrlen(" -f s16le -ar 48000 -ac 2 -") + 1;
+    for (const char* s = filename; *s; s++, len += 1 + (*s == ' ')) {}
+
+    char* command = safe_malloc(len);
+    char* ptr = command;
+
+    put_some_shit("ffmpeg -i ");
+
+    for (const char* c = filename; *c; c++) {
+        if (*c == ' ') put_SINGLE_shit('\\');
+        put_SINGLE_shit(*c);
+    }
+
+    put_some_shit(" -f s16le -ar 48000 -ac 2 -");
+    put_SINGLE_shit('\0');
+
+    FILE* pipe = popen(command, "r");
+    free(command);
+    if (pipe == NULL) exit(1);
+    return pipe;
+}
+
+static FILE* get_output_pipe(const char* filename) {
+    size_t len = conststrlen("ffmpeg -f s16le -ar 48k -ac 2 -i pipe: -y ") + 1;
+    for (const char* s = filename; *s; s++, len += 1 + (*s == ' ')) {}
+
+    char* command = safe_malloc(len);
+    char* ptr = command;
+
+    put_some_shit("ffmpeg -f s16le -ar 48k -ac 2 -i pipe: -y ");
+
+    for (const char* c = filename; *c; c++) {
+        if (*c == ' ') put_SINGLE_shit('\\');
+        put_SINGLE_shit(*c);
+    }
+
+    put_SINGLE_shit('\0');
+
+    FILE* pipe = popen(command, "w");
+    free(command);
+    if (pipe == NULL) exit(1);
+    return pipe;
+}
+
+static int get_buffers_count(FILE* file) {
+    int size = 0;
+    int16_t buffer[BUFFER_SIZE];
+    while (1) {
+        if (fread(buffer, sizeof(sample_t), BUFFER_SIZE, file) == 0) break;
+        size++;
+    }
+    return size;
+}
+
+static int sample_sorter(const void* a, const void* b) {
+    int64_t diff = 0;
+
+    for (int i = 0; i < BUFFER_SIZE; i++) {
+        diff += abs((*(sample_t**)a)[i]) - abs((*(sample_t**)b)[i]);
+    }
+
+    return (diff > 0) - (diff < 0);
+}
+
+int main(const int argc, const char* argv[]) {
+    if (argc < 3) {
+        fprintf(stderr, "Usage: %s <input_file> <output_file>\n", argv[0]);
+        return 1;
+    }
+    FILE* input = get_input_pipe(argv[1]);
+    const int bufc = get_buffers_count(input);
+    pclose(input);
+
+    input = get_input_pipe(argv[1]);
+    sample_t** pcm = safe_malloc(sizeof(sample_t*) * bufc);
+    for (int i = 0; i < bufc; i++) {
+        pcm[i] = safe_malloc(sizeof(sample_t) * BUFFER_SIZE);
+        fread(pcm[i], sizeof(sample_t), BUFFER_SIZE, input);
+    }
+    pclose(input);
+
+    qsort(pcm, bufc, sizeof(sample_t*), sample_sorter);
+
+    FILE* output = get_output_pipe(argv[2]);
+    for (int i = 0; i < bufc; i++) {
+        fwrite(pcm[i], sizeof(sample_t), BUFFER_SIZE, output);
+        free(pcm[i]);
+    }
+    pclose(output);
+    free(pcm);
+    return 0;
+}

closest_path_command.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include "levenshtein.h"
+#include "cstring_node.h"
+#include "exit_error.h"
+
+int main(int argc, char** argv) {
+    if (argc != 2) exit_error("Usage: %s <command>\n", argv[0]);
+
+    cstring_node* commands = get_path_commands();
+    if (!commands) exit_error("No commands found.\n");
+
+    char* closest = NULL;
+    int min_distance = INT_MAX;
+    
+    for (cstring_node* curr = commands; curr; curr = curr->next) {
+        int distance = levenshtein(argv[1], curr->name);
+        if (distance < min_distance) {
+            min_distance = distance;
+            free(closest);
+            closest = strdup(curr->name);
+        }
+    }
+
+    printf("Did you mean '%s'?\n", closest);
+
+    free(closest);
+    free_commands(commands);
+    return 0;
+}

cstring_node.h

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+
+typedef struct cstring_node {
+    char* name;
+    struct cstring_node* next;
+} cstring_node;
+
+static inline void insert_command(cstring_node** head, const char* command) {
+    for (cstring_node* curr = *head; curr != NULL; curr = curr->next) {
+        if (strcmp(curr->name, command) == 0) return;
+    }
+
+    cstring_node* node = (cstring_node*)malloc(sizeof(cstring_node));
+    if (!node) return;
+
+    node->name = strdup(command);
+    if (!node->name) {
+        free(node);
+        return;
+    }
+
+    node->next = *head;
+    *head = node;
+}
+
+static inline void free_commands(cstring_node* head) {
+    while (head) {
+        cstring_node* next = head->next;
+        free(head->name);
+        free(head);
+        head = next;
+    }
+}
+
+static inline cstring_node* get_path_commands() {
+    char* path_env = getenv("PATH");
+    if (!path_env) return NULL;
+
+    cstring_node* head = NULL;
+    char* path_copy = strdup(path_env);
+
+    for (char* dir = strtok(path_copy, ":"); dir != NULL; dir = strtok(NULL, ":")) {
+        DIR* d = opendir(dir);
+        if (!d) continue;
+
+        struct dirent* entry;
+        while ((entry = readdir(d)) != NULL) {
+            if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) continue;
+            insert_command(&head, entry->d_name);
+        }
+        closedir(d);
+    }
+
+    free(path_copy);
+    return head;
+}

exit_error.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+_Noreturn static inline void exit_error(const char* format, ...) {
+    va_list args;
+    va_start(args, format);
+    vfprintf(stderr, format, args);
+    va_end(args);
+    exit(1);
+}

forkmeower.c

@@ -0,0 +1,15 @@
+// gcc forkmeower.c -o forkmeower -O3
+#include <unistd.h>
+#include <stdio.h>
+#define f fork()
+
+#ifndef _Countof
+#define _Countof(a) (sizeof(a)/sizeof(a[0]))
+#endif
+
+const char* meow[] = {"nya ", "miao ", "meow ", "mew ", ":3 ", "mrrp ", "miaow ", "prrr ", "mewp "};
+
+int main() {
+    fputs(meow[(f^f^f^f^f^f^f^f)%_Countof(meow)], stdout);
+    return 0;
+}

graphics2d.hpp

@@ -0,0 +1,106 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+
+struct RGBColor {
+    uint8_t r = 255;
+    uint8_t g = 255;
+    uint8_t b = 255;
+};
+
+class Window {
+    SDL_Window* window;
+    SDL_Renderer* renderer;
+public:
+    Window(const char* name, const int w, const int h) {
+        if (SDL_Init(SDL_INIT_EVERYTHING) < 0 ||
+            !((window = SDL_CreateWindow(name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN))) ||
+            !((renderer = SDL_CreateRenderer(window, -1, 0)))
+        ) exit(1);
+    }
+
+    void scale(const float x, const float y) const {
+        SDL_RenderSetScale(renderer, x, y);
+    }
+
+    void close() const {
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        SDL_Quit();
+        exit(0);
+    }
+
+    void rect(const int x, const int y, const int w, const int h, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_Rect rect_ = {x, y, w, h};
+        SDL_RenderFillRect(renderer, &rect_);
+    }
+
+    void pixel(const int x, const int y, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderDrawPoint(renderer, x, y);
+    }
+
+    void circle(const int x, const int y, const int radius, const RGBColor c) const {
+        for (int i = 0; i < radius*2; i++) {
+            for (int j = 0; j < radius*2; j++) {
+                int dx = i - radius;
+                int dy = j - radius;
+                int distance = dx * dx + dy * dy;
+
+                if ((radius - 1) * (radius - 1) <= distance && distance <= radius * radius) {
+                    pixel(x - radius + i, y - radius + j, c);
+                }
+            }
+        }
+    }
+
+    void line(const int x1, const int y1, const int x2, const int y2, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
+    }
+
+    void rect_outline(const int x1, const int y1, const int w, const int h, const RGBColor c) const {
+        line(x1,     y1,     x1 + w, y1,     c);
+        line(x1 + w, y1,     x1 + w, y1 + h, c);
+        line(x1 + w, y1 + h, x1,     y1 + h, c);
+        line(x1,     y1 + h, x1,     y1,     c);
+    }
+
+    void input() const {
+        SDL_Event e;
+        while (SDL_PollEvent(&e)) {
+            if (e.type == SDL_QUIT) {
+                this->close();
+            }
+        }
+    }
+
+    void render(const unsigned int ms) const {
+        SDL_RenderPresent(renderer);
+        SDL_Delay(ms);
+    }
+
+    void clear(const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderClear(renderer);
+    }
+};
+
+/*
+old line() code because i dont want to lose it:
+
+int dx = x2 - x1;
+int dy = y2 - y1;
+float length = sqrt(dx * dx + dy * dy);
+
+for (int i = 0; i <= length; i++) {
+    int x = x1;
+    int y = y1;
+    if (length > 0) {
+        x += i * dx / length;
+        y += i * dy / length;
+    }
+    pixel(x, y, c);
+}
+*/

levenshtein.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef min
+#define min(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+#ifndef min3
+#define min3(a, b, c) (min(min(a, b), c))
+#endif
+
+static inline int levenshtein(const char* s1, const char* s2) {
+    int len1 = strlen(s1);
+    int len2 = strlen(s2);
+
+    int* row = malloc((len2 + 1) * sizeof(int));
+    if (!row) return -1;
+
+    for (int j = 0; j <= len2; j++)
+        row[j] = j;
+
+    for (int i = 1; i <= len1; i++) {
+        int prev_diag = row[0];
+        row[0] = i;
+        for (int j = 1; j <= len2; j++) {
+            int temp = row[j];
+            row[j] = min3(
+                row[j] + 1,                      // deletion
+                row[j-1] + 1,                    // insertion
+                prev_diag + (s1[i-1] != s2[j-1]) // substitution
+            );
+            prev_diag = temp;
+        }
+    }
+
+    int result = row[len2];
+    free(row);
+    return result;
+}

make_zombie_process.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int main() {
+    pid_t pid = fork();
+    if (pid < 0) {
+        perror("fork failed");
+        return 1;
+    }
+    if (pid != 0) {
+        sleep(30);
+    }
+    return 0;
+}

mod2mp3.cpp

@@ -0,0 +1,61 @@
+/* not sure will this run on windows
+ *
+ * you can actually use any audio format not just mp3 i had no idea how to call it
+ *
+ * compiles with:
+ * g++ mod2mp3.cpp -o mod2mp3 -O3 -lopenmpt
+ *
+ * usage: ./mod2mp3 <input.(xm/mod/stm/s3m/it/etc.)> <output.(mp3/wav/ogg/etc.)>
+ */
+
+#include <bits/stdc++.h>
+#include <libopenmpt/libopenmpt.hpp>
+
+#define BUFFER_SIZE 480
+#define SAMPLE_RATE 48000
+
+int main(int argc, char* argv[]) {
+    if (argc < 3) {
+        std::cout << "nouuuuuuuuu\n";
+        return 1;
+    }
+    std::ifstream file(argv[1], std::ios::binary);
+    openmpt::module mod(file);
+
+    std::string command = "ffmpeg -f s16le -ar " + std::to_string(SAMPLE_RATE) + " -ac 2 -i pipe: ";
+    for (char* c = argv[2]; *c; c++) {
+        if (*c == ' ') command += '\\';
+        command += *c;
+    }
+    std::cout << command << '\n';
+    FILE* pipe = popen(command.c_str(), "w");
+    if (!pipe) {
+        std::cerr << "Error: failed to open pipe\n";
+        return 1;
+    }
+
+    mod.set_render_param(openmpt::module::render_param::RENDER_INTERPOLATIONFILTER_LENGTH, 1); // no interpolation
+    mod.set_render_param(openmpt::module::render_param::RENDER_VOLUMERAMPING_STRENGTH, 0); // no volume ramping
+
+    try {
+        int16_t interleaved_buffer[BUFFER_SIZE * 2];
+        while (true) {
+            int16_t pcm_buffer_right[BUFFER_SIZE];
+            int16_t pcm_buffer_left[BUFFER_SIZE];
+            std::size_t count = mod.read(SAMPLE_RATE, BUFFER_SIZE, pcm_buffer_left, pcm_buffer_right);
+            if (count == 0) break;
+            for (size_t i = 0; i < count; i++) {
+                interleaved_buffer[2 * i] = pcm_buffer_left[i];
+                interleaved_buffer[2 * i + 1] = pcm_buffer_right[i];
+            }
+            fwrite(interleaved_buffer, sizeof(int16_t), count * 2, pipe);
+        }
+        pclose(pipe);
+    }
+    catch (const std::exception& e) {
+        std::cerr << "Error: " << std::string(e.what() ? e.what() : "unknown error") << '\n';
+        return 1;
+    }
+
+    return 0;
+}

pico8_color_pallete.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# https://pico-8.fandom.com/wiki/Palette
+colors=(
+    "0 0 0"
+    "29 43 83"
+    "126 37 83"
+    "0 135 81"
+    "171 82 54"
+    "95 87 79"
+    "194 195 199"
+    "255 241 232"
+    "255 0 77"
+    "255 163 0"
+    "255 236 39"
+    "0 228 54"
+    "41 173 255"
+    "131 118 156"
+    "255 119 168"
+    "255 204 170"
+)
+
+placeholders=("PK" "  " "  " "  " "  " "  " "PW" "  " "PR" "PO" "PY" "PG" "PB" "PS" "PM" "PE")
+
+
+printf "\n%s\n\n" "PICO-8 сolor palette"
+
+for i in "${!colors[@]}"; do
+    IFS=' ' read -r r g b <<< "${colors[i]}"
+
+    printf "#%02X%02X%02X " "$r" "$g" "$b"
+    printf "\e[38;2;%d;%d;%dm" "$r" "$g" "$b"
+    printf "████████████████"
+    printf "\e[0m"
+    printf " %-2s\n" "${placeholders[i]}"
+done

signal_handler.c

@@ -0,0 +1,16 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <signal.h>
+#include <string.h>
+#include <unistd.h>
+
+void signal_handler(int sig) {
+    printf("Caught signal SIG%s (%d) - %s\n", sigabbrev_np(sig), sig, strsignal(sig));
+    fflush(stdout);
+}
+
+int main() {
+    for (int i = 1; i < NSIG; signal(i++, signal_handler));
+    puts("Listening for signals");
+    while (pause());
+}

untitled_script.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+while IFS= read -r line; do
+    row=""
+    for (( i=0; i<${#line}; i++ )); do
+        char="${line:i:1}"
+        row+="$char$char"
+    done
+    echo "$row"
+    echo "$row"
+done