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[Misc] I will no longer drink cool aids of capital P.
author June Park <parkjune1995@gmail.com>
date Wed, 24 Dec 2025 06:22:59 -0800
parents a30944e5719e
children 75de5903355c
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1 #ifndef DOWA
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2 #define DOWA
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3
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4 #include <stdio.h>
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5 #include <string.h> // stdup
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6 #include <stdlib.h> // only for malloc, free, stuff
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7 #include <assert.h> // mostly for TODO
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8
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9 #ifdef DIRECTORY
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10 // Only for linux and mac since window do not support.
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11 // Maybe move this into seobeo file directly?
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12 #include <dirent.h> // some functions loop through files
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13 #endif
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15 #include <math.h> // I am not re-writing stuff I guess...
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16
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17 #include <sys/stat.h>
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18 #include <limits.h>
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19
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20 #include "dowa_internal.h"
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22 #define HASH_KEY_NUMBER 5381 // DJD hash number
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23 #define ONE_MEGA_BYTE 1048576
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24 #define TRUE 1
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25 #define FALSE 0
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27 #define Dowa_Free(p) do { \
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28 if (p) { \
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29 free(p); \
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30 (p) = NULL; \
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31 } \
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32 } while (0)
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33
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34 // Fixed-width integer types
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35 typedef unsigned int uint32; // 32-bit unsigned integer
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36 typedef int int32; // 32-bit signed integer
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37 typedef unsigned short uint16; // 16-bit unsigned integer
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38 typedef short int16; // 16-bit signed integer
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39 typedef unsigned char uint8; // 8-bit unsigned integer
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40 typedef char int8; // 8-bit signed integer
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41 typedef char boolean; // Boolean type (0 = false, nonzero = true)
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42
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43 // --- Arena Allocator --- //
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44 typedef struct {
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45 char *buffer;
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46 size_t offset;
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47 size_t capacity;
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48 } Dowa_Arena;
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49
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50 /* Creates a new arena with the specified capacity (in bytes). Returns a pointer to the arena, or NULL on failure. */
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51 extern Dowa_Arena *Dowa_Arena_Create(size_t capacity);
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52 /* Allocates a block of memory of the given size from the arena. Returns pointer to the allocated memory, or NULL if there is insufficient space. */
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53 extern void *Dowa_Arena_Allocate(Dowa_Arena *arena, size_t size);
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54 /* Destroys the arena and frees its underlying memory block.*/
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55 extern void Dowa_Arena_Destroy(Dowa_Arena *arena);
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56 /* Strdup but saves within the arena */
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57 extern void *Dowa_Arena_Copy(Dowa_Arena *p_arena, const void *src, size_t size);
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58 /* Resets the arena offset to 0, allowing reuse without freeing */
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59 extern void Dowa_Arena_Reset(Dowa_Arena *p_arena);
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60 /* Returns the current number of bytes allocated in the arena */
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61 extern size_t Dowa_Arena_Get_Used(Dowa_Arena *p_arena);
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62 /* Returns the remaining capacity in bytes */
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63 extern size_t Dowa_Arena_Get_Remaining(Dowa_Arena *p_arena);
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66 // --- HashMap --- //
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67 typedef enum {
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68 DOWA_HASH_MAP_TYPE_BUFFER, // Raw byte buffer
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69 DOWA_HASH_MAP_TYPE_STRING, // Null-terminated string
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70 DOWA_HASH_MAP_TYPE_HASHMAP, // Nested hashmap
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71 DOWA_HASH_MAP_TYPE_INT // Integer value
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72 } Dowa_HashMap_ValueType;
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73
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74 typedef struct Dowa_HashEntry {
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75 char *key;
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76 void *buffer;
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77 size_t capacity;
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78 Dowa_HashMap_ValueType type;
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79 struct Dowa_HashEntry *next;
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80 } Dowa_HashEntry;
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82 typedef struct {
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83 Dowa_HashEntry **entries;
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84 size_t capacity;
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85 uint32 current_capacity;
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86 Dowa_Arena *p_arena;
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87 } Dowa_HashMap;
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88
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89 /* Creates a new hashmap with the given initial capacity. Returns pointer to the hashmap, or NULL on failure. */
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90 extern Dowa_HashMap *Dowa_HashMap_Create(size_t capacity);
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91 /* Creates a new hashmap with the given initial capacity, using the provided arena for all internal allocations. Returns pointer to the hashmap, or NULL on failure. */
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92 extern Dowa_HashMap *Dowa_HashMap_Create_With_Arena(size_t capacity, Dowa_Arena *arena);
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93 /* Destroys the hashmap and frees all associated memory */
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94 extern void Dowa_HashMap_Destroy(Dowa_HashMap *p_hash_map);
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95 /* Returns the index of the entry for the specified key, or -1 if the key is not found. */
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96 extern int32 Dowa_HashMap_Get_Position(Dowa_HashMap *p_hash_map, const char *key);
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97 /* Retrieves the value buffer for the specified key, or NULL if the key does not exist. */
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98 extern void *Dowa_HashMap_Get(Dowa_HashMap *p_hash_map, const char *key);
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99 /* Inserts a copy of the given value into the hashmap under the specified key. Uses DOWA_HASH_MAP_TYPE_BUFFER as the entry type. */
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100 extern void Dowa_HashMap_Push_Value(Dowa_HashMap *p_hash_map, const char *key, void *value, size_t value_size);
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101 /* Inserts a copy of the given value with the specified type into the hashmap under the key. Returns the index of the new entry, or -1 on failure. */
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102 extern int32 Dowa_HashMap_Push_Value_With_Type(Dowa_HashMap *p_hash_map, const char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type);
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103 /* Inserts a value pointer into the hashmap under the specified key without copying data. The caller retains ownership of the pointer. Returns the entry index, or -1 on failure. */
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104 extern int32 Dowa_HashMap_Push_Value_With_Type_NoCopy(Dowa_HashMap *p_hash_map, const char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type);
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105 /* Removes the entry with the specified key from the hashmap and frees its data if owned. */
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106 extern void Dowa_HashMap_Pop_Key(Dowa_HashMap *p_hash_map, const char *key);
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107 /* Returns TRUE if the key exists in the hashmap, FALSE otherwise. */
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108 extern boolean Dowa_HashMap_Has_Key(Dowa_HashMap *p_hash_map, const char *key);
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109 /* Removes all entries from the hashmap without destroying it. */
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110 extern void Dowa_HashMap_Clear(Dowa_HashMap *p_hash_map);
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111 /* Returns the number of entries currently in the hashmap. */
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112 extern uint32 Dowa_HashMap_Get_Count(Dowa_HashMap *p_hash_map);
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113
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114 // --- String manipuliation -- //
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115 // Splice string from start to end
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116 const char *Dowa_String_Slice(const char *from, size_t start, size_t end);
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117 // --- Miscellaneous --- //
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118 char *Dowa_Int32ToString(uint32 value, char *buffer); /* Just use atoid lmao*/
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119
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120 // --- Utility Functions --- //
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121 /* Prints all entries in the hashmap to stdout for debugging purposes. */
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122 extern void Dowa_HashMap_Print(Dowa_HashMap *map);
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123 #ifdef DIRECTORY
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124 /* Loads all files from the specified folder into the hashmap. Uses file names as keys and file contents as values. Returns 0 on success, or -1 on failure. */
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125 extern int Dowa_HashMap_Cache_Folder(Dowa_HashMap *map, const char *folder_path);
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126 #endif
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2758f5527d2b [Seobeo] Working on simple TCP server and client logic.
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127
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128
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129 #endif