block-sha1: move code around

Move the code around so specific architecture hacks are defined first.
Also make one line comments actually one line.  No code change.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

block-sha1/sha1.c

@@ -9,74 +9,6 @@
 
 #include "sha1.h"
 
-/* Hash one 64-byte block of data */
-static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data);
-
-void blk_SHA1_Init(blk_SHA_CTX *ctx)
-{
-	ctx->size = 0;
-
-	/* Initialize H with the magic constants (see FIPS180 for constants)
-	 */
-	ctx->H[0] = 0x67452301;
-	ctx->H[1] = 0xefcdab89;
-	ctx->H[2] = 0x98badcfe;
-	ctx->H[3] = 0x10325476;
-	ctx->H[4] = 0xc3d2e1f0;
-}
-
-
-void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
-{
-	int lenW = ctx->size & 63;
-
-	ctx->size += len;
-
-	/* Read the data into W and process blocks as they get full
-	 */
-	if (lenW) {
-		int left = 64 - lenW;
-		if (len < left)
-			left = len;
-		memcpy(lenW + (char *)ctx->W, data, left);
-		lenW = (lenW + left) & 63;
-		len -= left;
-		data += left;
-		if (lenW)
-			return;
-		blk_SHA1Block(ctx, ctx->W);
-	}
-	while (len >= 64) {
-		blk_SHA1Block(ctx, data);
-		data += 64;
-		len -= 64;
-	}
-	if (len)
-		memcpy(ctx->W, data, len);
-}
-
-
-void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
-{
-	static const unsigned char pad[64] = { 0x80 };
-	unsigned int padlen[2];
-	int i;
-
-	/* Pad with a binary 1 (ie 0x80), then zeroes, then length
-	 */
-	padlen[0] = htonl(ctx->size >> 29);
-	padlen[1] = htonl(ctx->size << 3);
-
-	i = ctx->size & 63;
-	blk_SHA1_Update(ctx, pad, 1+ (63 & (55 - i)));
-	blk_SHA1_Update(ctx, padlen, 8);
-
-	/* Output hash
-	 */
-	for (i = 0; i < 5; i++)
-		((unsigned int *)hashout)[i] = htonl(ctx->H[i]);
-}
-
 #if defined(__i386__) || defined(__x86_64__)
 
 #define SHA_ASM(op, x, n) ({ unsigned int __res; __asm__(op " %1,%0":"=r" (__res):"i" (n), "0" (x)); __res; })
@@ -136,7 +68,7 @@ void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
 #define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E )
 #define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) ,  0xca62c1d6, A, B, C, D, E )
 
-static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data)
+static void blk_SHA1_Block(blk_SHA_CTX *ctx, const unsigned int *data)
 {
 	unsigned int A,B,C,D,E;
 	unsigned int array[16];
@@ -243,3 +175,62 @@ static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data)
 	ctx->H[3] += D;
 	ctx->H[4] += E;
 }
+
+void blk_SHA1_Init(blk_SHA_CTX *ctx)
+{
+	ctx->size = 0;
+
+	/* Initialize H with the magic constants (see FIPS180 for constants) */
+	ctx->H[0] = 0x67452301;
+	ctx->H[1] = 0xefcdab89;
+	ctx->H[2] = 0x98badcfe;
+	ctx->H[3] = 0x10325476;
+	ctx->H[4] = 0xc3d2e1f0;
+}
+
+void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
+{
+	int lenW = ctx->size & 63;
+
+	ctx->size += len;
+
+	/* Read the data into W and process blocks as they get full */
+	if (lenW) {
+		int left = 64 - lenW;
+		if (len < left)
+			left = len;
+		memcpy(lenW + (char *)ctx->W, data, left);
+		lenW = (lenW + left) & 63;
+		len -= left;
+		data += left;
+		if (lenW)
+			return;
+		blk_SHA1_Block(ctx, ctx->W);
+	}
+	while (len >= 64) {
+		blk_SHA1_Block(ctx, data);
+		data += 64;
+		len -= 64;
+	}
+	if (len)
+		memcpy(ctx->W, data, len);
+}
+
+void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
+{
+	static const unsigned char pad[64] = { 0x80 };
+	unsigned int padlen[2];
+	int i;
+
+	/* Pad with a binary 1 (ie 0x80), then zeroes, then length */
+	padlen[0] = htonl(ctx->size >> 29);
+	padlen[1] = htonl(ctx->size << 3);
+
+	i = ctx->size & 63;
+	blk_SHA1_Update(ctx, pad, 1+ (63 & (55 - i)));
+	blk_SHA1_Update(ctx, padlen, 8);
+
+	/* Output hash */
+	for (i = 0; i < 5; i++)
+		((unsigned int *)hashout)[i] = htonl(ctx->H[i]);
+}