REVIEWED: Several functions const correctness

src/raylib.h

@@ -1126,7 +1126,7 @@ RLAPI void MemFree(void *ptr);                                  // Internal memo
 // File system management functions
 RLAPI unsigned char *LoadFileData(const char *fileName, int *dataSize); // Load file data as byte array (read)
 RLAPI void UnloadFileData(unsigned char *data);                     // Unload file data allocated by LoadFileData()
-RLAPI bool SaveFileData(const char *fileName, void *data, int dataSize); // Save data to file from byte array (write), returns true on success
+RLAPI bool SaveFileData(const char *fileName, const void *data, int dataSize); // Save data to file from byte array (write), returns true on success
 RLAPI bool ExportDataAsCode(const unsigned char *data, int dataSize, const char *fileName); // Export data to code (.h), returns true on success
 RLAPI char *LoadFileText(const char *fileName);                     // Load text data from file (read), returns a '\0' terminated string
 RLAPI void UnloadFileText(char *text);                              // Unload file text data allocated by LoadFileText()
@@ -1175,10 +1175,10 @@ RLAPI unsigned char *CompressData(const unsigned char *data, int dataSize, int *
 RLAPI unsigned char *DecompressData(const unsigned char *compData, int compDataSize, int *dataSize);  // Decompress data (DEFLATE algorithm), memory must be MemFree()
 RLAPI char *EncodeDataBase64(const unsigned char *data, int dataSize, int *outputSize);               // Encode data to Base64 string (includes NULL terminator), memory must be MemFree()
 RLAPI unsigned char *DecodeDataBase64(const char *text, int *outputSize);                             // Decode Base64 string (expected NULL terminated), memory must be MemFree()
-RLAPI unsigned int ComputeCRC32(unsigned char *data, int dataSize); // Compute CRC32 hash code
+RLAPI unsigned int ComputeCRC32(const unsigned char *data, int dataSize); // Compute CRC32 hash code
-RLAPI unsigned int *ComputeMD5(unsigned char *data, int dataSize);  // Compute MD5 hash code, returns static int[4] (16 bytes)
+RLAPI unsigned int *ComputeMD5(const unsigned char *data, int dataSize);  // Compute MD5 hash code, returns static int[4] (16 bytes)
-RLAPI unsigned int *ComputeSHA1(unsigned char *data, int dataSize); // Compute SHA1 hash code, returns static int[5] (20 bytes)
+RLAPI unsigned int *ComputeSHA1(const unsigned char *data, int dataSize); // Compute SHA1 hash code, returns static int[5] (20 bytes)
-RLAPI unsigned int *ComputeSHA256(unsigned char *data, int dataSize); // Compute SHA256 hash code, returns static int[8] (32 bytes)
+RLAPI unsigned int *ComputeSHA256(const unsigned char *data, int dataSize); // Compute SHA256 hash code, returns static int[8] (32 bytes)
 
 // Automation events functionality
 RLAPI AutomationEventList LoadAutomationEventList(const char *fileName); // Load automation events list from file, NULL for empty list, capacity = MAX_AUTOMATION_EVENTS

src/rcore.c

@@ -2028,7 +2028,7 @@ void UnloadFileData(unsigned char *data)
 }
 
 // Save data to file from buffer
-bool SaveFileData(const char *fileName, void *data, int dataSize)
+bool SaveFileData(const char *fileName, const void *data, int dataSize)
 {
     bool result = false;
 
@@ -3163,7 +3163,7 @@ unsigned char *DecodeDataBase64(const char *text, int *outputSize)
 }
 
 // Compute CRC32 hash code
-unsigned int ComputeCRC32(unsigned char *data, int dataSize)
+unsigned int ComputeCRC32(const unsigned char *data, int dataSize)
 {
     static unsigned int crcTable[256] = {
         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
@@ -3209,7 +3209,7 @@ unsigned int ComputeCRC32(unsigned char *data, int dataSize)
 
 // Compute MD5 hash code
 // NOTE: Returns a static int[4] array (16 bytes)
-unsigned int *ComputeMD5(unsigned char *data, int dataSize)
+unsigned int *ComputeMD5(const unsigned char *data, int dataSize)
 {
     #define ROTATE_LEFT(x, c) (((x) << (c)) | ((x) >> (32 - (c))))
 
@@ -3327,7 +3327,7 @@ unsigned int *ComputeMD5(unsigned char *data, int dataSize)
 
 // Compute SHA-1 hash code
 // NOTE: Returns a static int[5] array (20 bytes)
-unsigned int *ComputeSHA1(unsigned char *data, int dataSize)
+unsigned int *ComputeSHA1(const unsigned char *data, int dataSize)
 {
     #define SHA1_ROTATE_LEFT(x, c) (((x) << (c)) | ((x) >> (32 - (c))))
 
@@ -3437,7 +3437,7 @@ unsigned int *ComputeSHA1(unsigned char *data, int dataSize)
 
 // Compute SHA-256 hash code
 // NOTE: Returns a static int[8] array (32 bytes)
-unsigned int *ComputeSHA256(unsigned char *data, int dataSize)
+unsigned int *ComputeSHA256(const unsigned char *data, int dataSize)
 {
     #define SHA256_ROTATE_RIGHT(x, c) ((x >> c) | (x << ((sizeof(unsigned int)*8) - c)))
     #define SHA256_A0(x) (SHA256_ROTATE_RIGHT(x, 7) ^ SHA256_ROTATE_RIGHT(x, 18) ^ (x >> 3))