Update scrypt.h

Author: JaredTate

src/crypto/scrypt.h

@@ -27,25 +27,31 @@ void
 PBKDF2_SHA256(const uint8_t *passwd, size_t passwdlen, const uint8_t *salt,
     size_t saltlen, uint64_t c, uint8_t *buf, size_t dkLen);
 
-// Use system-provided endian functions on BSD/macOS, provide our own elsewhere
+// Use system-provided endian functions when available, provide our own elsewhere
 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
-#include <sys/endian.h>
+    // BSD/macOS: use sys/endian.h
+    #include <sys/endian.h>
+#elif defined(__linux__) || defined(__GLIBC__)
+    // Linux: use endian.h and provide BSD-style function names
+    #include <endian.h>
+    #define le32dec(p) le32toh(*(const uint32_t *)(p))
+    #define le32enc(p, v) do { *(uint32_t *)(p) = htole32(v); } while (0)
 #else
-// Portable inline implementations for little-endian encoding/decoding
-static inline uint32_t le32dec(const void *pp)
-{
-        const uint8_t *p = (uint8_t const *)pp;
-        return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
-            ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
-}
+    // Fallback: portable inline implementations for little-endian encoding/decoding
+    static inline uint32_t le32dec(const void *pp)
+    {
+            const uint8_t *p = (uint8_t const *)pp;
+            return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
+                ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
+    }
 
-static inline void le32enc(void *pp, uint32_t x)
-{
-        uint8_t *p = (uint8_t *)pp;
-        p[0] = x & 0xff;
-        p[1] = (x >> 8) & 0xff;
-        p[2] = (x >> 16) & 0xff;
-        p[3] = (x >> 24) & 0xff;
-}
+    static inline void le32enc(void *pp, uint32_t x)
+    {
+            uint8_t *p = (uint8_t *)pp;
+            p[0] = x & 0xff;
+            p[1] = (x >> 8) & 0xff;
+            p[2] = (x >> 16) & 0xff;
+            p[3] = (x >> 24) & 0xff;
+    }
 #endif
 #endif