Review variables initialization

- All variables are initialized on declaration, some arrays were not properly initialized
 - Static array buffers require memset() for re-initialization on every function call

src/raudio.c

@@ -2013,7 +2013,7 @@ static ma_uint32 ReadAudioBufferFramesInInternalFormat(AudioBuffer *audioBuffer,
 
     // Another thread can update the processed state of buffers so
     // we just take a copy here to try and avoid potential synchronization problems
-    bool isSubBufferProcessed[2];
+    bool isSubBufferProcessed[2] = { 0 };
     isSubBufferProcessed[0] = audioBuffer->isSubBufferProcessed[0];
     isSubBufferProcessed[1] = audioBuffer->isSubBufferProcessed[1];
 
@@ -2096,7 +2096,7 @@ static ma_uint32 ReadAudioBufferFramesInMixingFormat(AudioBuffer *audioBuffer, f
     // should be defined by the output format of the data converter. We do this until frameCount frames have been output. The important
     // detail to remember here is that we never, ever attempt to read more input data than is required for the specified number of output
     // frames. This can be achieved with ma_data_converter_get_required_input_frame_count().
-    ma_uint8 inputBuffer[4096];
+    ma_uint8 inputBuffer[4096] = { 0 };
     ma_uint32 inputBufferFrameCap = sizeof(inputBuffer)/ma_get_bytes_per_frame(audioBuffer->converter.config.formatIn, audioBuffer->converter.config.channelsIn);
 
     ma_uint32 totalOutputFramesProcessed = 0;
@@ -2165,7 +2165,7 @@ static void OnSendAudioDataToDevice(ma_device *pDevice, void *pFramesOut, const
 
                 while (framesToRead > 0)
                 {
-                    float tempBuffer[1024]; // 512 frames for stereo
+                    float tempBuffer[1024] = { 0 }; // Frames for stereo
 
                     ma_uint32 framesToReadRightNow = framesToRead;
                     if (framesToReadRightNow > sizeof(tempBuffer)/sizeof(tempBuffer[0])/AUDIO_DEVICE_CHANNELS)

src/rcore.c

@@ -5633,8 +5633,8 @@ static void ProcessKeyboard(void)
     #define MAX_KEYBUFFER_SIZE      32      // Max size in bytes to read
 
     // Keyboard input polling (fill keys[256] array with status)
-    int bufferByteCount = 0;                // Bytes available on the buffer
-    char keysBuffer[MAX_KEYBUFFER_SIZE];    // Max keys to be read at a time
+    int bufferByteCount = 0;                        // Bytes available on the buffer
+    char keysBuffer[MAX_KEYBUFFER_SIZE] = { 0 };    // Max keys to be read at a time
 
     // Read availables keycodes from stdin
     bufferByteCount = read(STDIN_FILENO, keysBuffer, MAX_KEYBUFFER_SIZE);     // POSIX system call

src/rlgl.h

@@ -4547,8 +4547,8 @@ static unsigned char *rlGenNextMipmapData(unsigned char *srcData, int srcWidth,
 {
     int x2 = 0;
     int y2 = 0;
-    unsigned char prow[4];
-    unsigned char pcol[4];
+    unsigned char prow[4] = { 0 };
+    unsigned char pcol[4] = { 0 };
 
     int width = srcWidth/2;
     int height = srcHeight/2;

src/rtext.c

@@ -1142,12 +1142,11 @@ bool TextIsEqual(const char *text1, const char *text2)
 {
     bool result = false;
 
-    if (text1 == NULL || text2 == NULL) {
-        return false;
+    if ((text1 != NULL) && (text2 != NULL))
+    {
+        if (strcmp(text1, text2) == 0) result = true;
     }
 
-    if (strcmp(text1, text2) == 0) result = true;
-
     return result;
 }
 
@@ -1155,6 +1154,7 @@ bool TextIsEqual(const char *text1, const char *text2)
 const char *TextSubtext(const char *text, int position, int length)
 {
     static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
+    memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
 
     int textLength = TextLength(text);
 
@@ -1178,21 +1178,21 @@ const char *TextSubtext(const char *text, int position, int length)
 }
 
 // Replace text string
-// REQUIRES: strstr(), strncpy(), strcpy()
+// REQUIRES: strlen(), strstr(), strncpy(), strcpy()
 // WARNING: Returned buffer must be freed by the user (if return != NULL)
 char *TextReplace(char *text, const char *replace, const char *by)
 {
     // Sanity checks and initialization
     if (!text || !replace || !by) return NULL;
 
-    char *result;
+    char *result = NULL;
 
-    char *insertPoint;      // Next insert point
-    char *temp;             // Temp pointer
-    int replaceLen;         // Replace string length of (the string to remove)
-    int byLen;              // Replacement length (the string to replace replace by)
-    int lastReplacePos;     // Distance between replace and end of last replace
-    int count;              // Number of replacements
+    char *insertPoint = NULL;   // Next insert point
+    char *temp = NULL;          // Temp pointer
+    int replaceLen = 0;         // Replace string length of (the string to remove)
+    int byLen = 0;              // Replacement length (the string to replace replace by)
+    int lastReplacePos = 0;     // Distance between replace and end of last replace
+    int count = 0;              // Number of replacements
 
     replaceLen = TextLength(replace);
     if (replaceLen == 0) return NULL;  // Empty replace causes infinite loop during count
@@ -1249,9 +1249,9 @@ char *TextInsert(const char *text, const char *insert, int position)
 // REQUIRES: memset(), memcpy()
 const char *TextJoin(const char **textList, int count, const char *delimiter)
 {
-    static char text[MAX_TEXT_BUFFER_LENGTH] = { 0 };
-    memset(text, 0, MAX_TEXT_BUFFER_LENGTH);
-    char *textPtr = text;
+    static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
+    memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
+    char *textPtr = buffer;
 
     int totalLength = 0;
     int delimiterLen = TextLength(delimiter);
@@ -1276,7 +1276,7 @@ const char *TextJoin(const char **textList, int count, const char *delimiter)
         }
     }
 
-    return text;
+    return buffer;
 }
 
 // Split string into multiple strings
@@ -1346,6 +1346,7 @@ int TextFindIndex(const char *text, const char *find)
 const char *TextToUpper(const char *text)
 {
     static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
+    memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
 
     for (int i = 0; i < MAX_TEXT_BUFFER_LENGTH; i++)
     {
@@ -1368,6 +1369,7 @@ const char *TextToUpper(const char *text)
 const char *TextToLower(const char *text)
 {
     static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
+    memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
 
     for (int i = 0; i < MAX_TEXT_BUFFER_LENGTH; i++)
     {
@@ -1387,6 +1389,7 @@ const char *TextToLower(const char *text)
 const char *TextToPascal(const char *text)
 {
     static char buffer[MAX_TEXT_BUFFER_LENGTH] = { 0 };
+    memset(buffer, 0, MAX_TEXT_BUFFER_LENGTH);
 
     buffer[0] = (char)toupper(text[0]);
 
@@ -1666,7 +1669,7 @@ static Font LoadBMFont(const char *fileName)
 
     int imWidth = 0;
     int imHeight = 0;
-    char imFileName[129];
+    char imFileName[129] = { 0 };
 
     int base = 0;   // Useless data