--- a/crc32i.h	Mon Feb 09 01:15:00 2026 -0500
+++ b/crc32i.h	Mon Feb 09 01:18:06 2026 -0500
@@ -29,12 +29,9 @@
 /* shared by crc32c and crc32qw */
 extern const uint32_t crc32_tab[256];
 
-/* Calculates crc32 by bytes. Has no alignment requirement */
-uint32_t crc32c_r(uint32_t crc, const unsigned char *message, size_t sz);
-/* Calculates crc32 in dwords. Requires 4-byte alignment */
-uint32_t crc32qw_r(uint32_t crc, const unsigned char *message, size_t sz);
-/* Calculates crc32 using intel SIMD. Requires 16-byte alignment */
-uint32_t crc32x86_vpclmulqdq_r(uint32_t crc, const unsigned char *msg, size_t sz);
+/* declare */
+#define CRC32_IMPL(name) uint32_t crc32##name##_r(uint32_t, const unsigned char *, size_t);
+#include "crc32-impls.h"
 
 /* Maximum alignment value for each impl to work */
 #define MAX(x, y) ((x)>(y)?(x):(y))