make various changes regarding code safety and stylistic choices

src/errors.c

@@ -9,7 +9,7 @@
 void error(const ErrorCode error_code, const char* format, ...) {
     char buffer[MAX_STR_LEN] = {0}; // contains the buffer of the final string
 
-    va_list args = {0};
+    va_list args;
     va_start(args, format);
     vsnprintf(buffer, MAX_STR_LEN, format, args);
     va_end(args);
@@ -23,7 +23,7 @@ void error(const ErrorCode error_code, const char* format, ...) {
 void warn(const char* format, ...) {
     char buffer[MAX_STR_LEN] = {0}; // contains the buffer of the final string
 
-    va_list args = {0};
+    va_list args;
     va_start(args, format);
     vsnprintf(buffer, MAX_STR_LEN, format, args);
     va_end(args);

src/main.c

@@ -35,8 +35,8 @@ static void init(void) {
     }
 
     // initialize audio
-    AudioDevice* audio_device = audio_device_init(32000, AUDIO_S16, 1, 4096);
-    //AudioData audio1 = audio_load_wav(audio_device, "FILE MANE");
+    AudioDevice* audio_device = audio_device_init(32000, AUDIO_S16, 1, 255);
+    AudioData audio1 = audio_load_wav(audio_device, "FILE NAME");
 }
 
 // handles game application updating
@@ -53,10 +53,12 @@ static void update(void) {
         }
     }
 
-    // preform updates
+    // updates the game
     game_update((GameData){}, SDL_GetKeyboardState(NULL));
-    renderer_update(&(RenderData){
-        window, renderer});
+
+    // updates the render
+    RenderData render_data = {window, renderer};
+    renderer_update(&render_data);
 }
 
 // handles game application quitting
@@ -65,7 +67,7 @@ void stop(void) {
 }
 
 // entry point of the application
-int main(int argc, char** argv) {
+int main(void) {
     init();
 
     while (playing)

src/window/audio.c

@@ -13,7 +13,7 @@ typedef struct {
 } AudioCallbackData;
 
 // audio callback from SDL_AudioSpec; called when the audio device needs more data
-static void audio_mixer(void* userdata, Uint8* stream, int len) {
+static void audio_mixer(void* userdata, uint8_t* stream, int32_t len) {
     memset(stream, 0, len);         // clear the playing audio
     AudioDevice* device = userdata; // get the callback data
     AudioData* audio = device->playing_audio;
@@ -25,7 +25,7 @@ static void audio_mixer(void* userdata, Uint8* stream, int len) {
         }
 
         // get the length of which we shall be mixing
-        Uint32 mix_length = SDL_min(audio[i].length, len);
+        uint32_t mix_length = SDL_min(audio[i].length, len);
 
         // mix the audio with the stream
         SDL_MixAudioFormat(stream, audio[i].buffer, device->format, mix_length, SDL_MIX_MAXVOLUME);
@@ -37,7 +37,7 @@ static void audio_mixer(void* userdata, Uint8* stream, int len) {
 // converts the audio to the format of the audio device
 static void convert_audio(const AudioDevice* audio_device, const SDL_AudioSpec wav_spec, Uint8** wav_buffer, Uint32* wav_length) {
     // build the audio converter with the audio given
-    SDL_AudioCVT cvt = {0};
+    SDL_AudioCVT cvt;
     SDL_BuildAudioCVT(&cvt, wav_spec.format, wav_spec.channels, wav_spec.freq, audio_device->format, audio_device->channels, audio_device->freq);
 
     cvt.len = (*wav_length) * wav_spec.channels;          // the buffer length
@@ -56,8 +56,8 @@ static void convert_audio(const AudioDevice* audio_device, const SDL_AudioSpec w
 
 // loads a WAV file and returns the relevant information
 AudioData audio_load_wav(const AudioDevice* audio_device, const char* file_path) {
-    SDL_AudioSpec wav_spec = {0};
-    AudioData audio = {0};
+    SDL_AudioSpec wav_spec;
+    AudioData audio;
 
     SDL_LoadWAV(file_path, &wav_spec, &audio.buffer, &audio.length);
     convert_audio(audio_device, wav_spec, &audio.buffer, &audio.length);
@@ -67,7 +67,7 @@ AudioData audio_load_wav(const AudioDevice* audio_device, const char* file_path)
 }
 
 // initializes the audio device
-AudioDevice* audio_device_init(const int freq, const SDL_AudioFormat format, const Uint8 channels, const Uint16 samples) {
+AudioDevice* audio_device_init(const int32_t freq, const SDL_AudioFormat format, const uint8_t channels, const uint8_t samples) {
     // allocate memory for the audio device
     AudioDevice* audio_device = malloc(sizeof(AudioDevice));
 
@@ -103,7 +103,6 @@ void audio_play(const AudioDevice* audio_device, const AudioData audio) {
     for (int i = 0; i < MAX_SOUNDS; i++) {
         // overrite audio that has been deallocated
         if (playing_audio[i].length <= 0) {
-
             // override the audio
             playing_audio[i] = audio;
             break; // don't continue. :3

src/window/audio.h

@@ -2,20 +2,20 @@
 #include <SDL2/SDL.h>
 
 typedef struct {
-    Uint32 length;
-    Uint32 mixed_amount;
-    Uint8* buffer;
+    uint32_t length;
+    uint32_t mixed_amount;
+    uint8_t* buffer;
 } AudioData;
 
 typedef struct {
     SDL_AudioDeviceID id;
-    int freq;
+    int32_t freq;
     SDL_AudioFormat format;
-    Uint8 channels;
+    uint8_t channels;
     AudioData* playing_audio;
 } AudioDevice;
 
 
 AudioData audio_load_wav(const AudioDevice* audio_device, const char* file_path);
-AudioDevice* audio_device_init(const int freq, const SDL_AudioFormat format, const Uint8 channels, const Uint16 samples);
+AudioDevice* audio_device_init(const int32_t freq, const SDL_AudioFormat format, const uint8_t channels, const uint8_t samples);
 void audio_play(const AudioDevice* audio_device, const AudioData audio);

src/window/renderer.c

@@ -5,7 +5,6 @@
 #include <stdio.h>
 
 #include "../errors.h"
-#include "../main.h"
 
 
 int renderer_init(SDL_Window** window, SDL_Renderer** renderer) {