Fix build warnings

Signed-off-by: François Andriot <francois.andriot@free.fr>

kernel/kls_dds/dds.cpp

@@ -564,7 +564,12 @@ static void FREE_ROWS(RGBAP **A, const int H)
 
 		void GetBits( uchar bit_array[16] )
 		{
-			uint b = (uint &) bits[0];
+			// uint b = (uint &) bits[0];
+			/* avoid a warning
+			 * "dereferencing type-punned pointer will break strict-aliasing rules"
+			 * TODO: check endianness issues (but that was probably broken anyway) */
+			uint b;
+			memcpy(&b, &bits[0], sizeof(b));
 			bit_array[0] = uchar(b & 0x07); b >>= 3;
 			bit_array[1] = uchar(b & 0x07); b >>= 3;
 			bit_array[2] = uchar(b & 0x07); b >>= 3;
@@ -574,7 +579,8 @@ static void FREE_ROWS(RGBAP **A, const int H)
 			bit_array[6] = uchar(b & 0x07); b >>= 3;
 			bit_array[7] = uchar(b & 0x07); b >>= 3;
 
-			b = (uint &) bits[3];
+			// b = (uint &) bits[3];
+			memcpy(&b, &bits[3], sizeof(b));
 			bit_array[8] = uchar(b & 0x07); b >>= 3;
 			bit_array[9] = uchar(b & 0x07); b >>= 3;
 			bit_array[10] = uchar(b & 0x07); b >>= 3;

kernel/kls_hdr/fmt_codec_hdr.cpp

@@ -136,8 +136,9 @@ s32 fmt_codec::read_scanline(RGBA *scan)
         if (e != 0)
 	    e = (e - 1) << 23;
 
-        t = *(float *)&e;
-
+        // t = *(float *)&e;
+        /* avoid "dereferencing type-punned pointer will break strict-aliasing rules" warning */
+        memcpy(&t, &e, sizeof(t));
         (scan + i)->r = u8((r / 255.0f) * t);
         (scan + i)->g = u8((g / 255.0f) * t);
         (scan + i)->b = u8((b / 255.0f) * t);

kernel/kls_png/ksquirrel-libs-png/pngpread.c

@@ -1670,7 +1670,7 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
 #endif
       png_strncpy((png_charp)png_ptr->unknown_chunk.name,
 	 (png_charp)png_ptr->chunk_name,
-        png_sizeof((png_charp)png_ptr->chunk_name));
+        png_sizeof(png_ptr->unknown_chunk.name));
       png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
       png_ptr->unknown_chunk.size = (png_size_t)length;
       png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);

kernel/kls_png/ksquirrel-libs-png/pngrutil.c

@@ -2374,7 +2374,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 #endif
        png_strncpy((png_charp)png_ptr->unknown_chunk.name,
 	 (png_charp)png_ptr->chunk_name,
-         png_sizeof((png_charp)png_ptr->chunk_name));
+         png_sizeof(png_ptr->unknown_chunk.name));
        png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
        png_ptr->unknown_chunk.size = (png_size_t)length;
        png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);