hash.c: Conditionally compile hash_command, static hash_show

The function hash_show is now only called by hash_command, so mark it as
static (and drop from hash.h).  We only call hash_command when any of
CONFIG_CMD_CRC32, CONFIG_CMD_SHA1SUM or CONFIG_CMD_HASH are set.  Since
hash.c is linked in unconditionally we must take extra care with
functions that bring in read-only strings as these will not be
discarded.

Signed-off-by: Tom Rini <trini@konsulko.com>

common/hash.c

@@ -247,6 +247,29 @@ int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
 	return 0;
 }
 
+int hash_block(const char *algo_name, const void *data, unsigned int len,
+	       uint8_t *output, int *output_size)
+{
+	struct hash_algo *algo;
+	int ret;
+
+	ret = hash_lookup_algo(algo_name, &algo);
+	if (ret)
+		return ret;
+
+	if (output_size && *output_size < algo->digest_size) {
+		debug("Output buffer size %d too small (need %d bytes)",
+		      *output_size, algo->digest_size);
+		return -ENOSPC;
+	}
+	if (output_size)
+		*output_size = algo->digest_size;
+	algo->hash_func_ws(data, len, output, algo->chunk_size);
+
+	return 0;
+}
+
+#if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
 /**
  * store_result: Store the resulting sum to an address or variable
  *
@@ -359,7 +382,7 @@ static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
 	return 0;
 }
 
-void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
+static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
 {
 	int i;
 
@@ -368,28 +391,6 @@ void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
 		printf("%02x", output[i]);
 }
 
-int hash_block(const char *algo_name, const void *data, unsigned int len,
-	       uint8_t *output, int *output_size)
-{
-	struct hash_algo *algo;
-	int ret;
-
-	ret = hash_lookup_algo(algo_name, &algo);
-	if (ret)
-		return ret;
-
-	if (output_size && *output_size < algo->digest_size) {
-		debug("Output buffer size %d too small (need %d bytes)",
-		      *output_size, algo->digest_size);
-		return -ENOSPC;
-	}
-	if (output_size)
-		*output_size = algo->digest_size;
-	algo->hash_func_ws(data, len, output, algo->chunk_size);
-
-	return 0;
-}
-
 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
 		 int argc, char * const argv[])
 {
@@ -473,3 +474,4 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
 	return 0;
 }
 #endif
+#endif

include/hash.h

@@ -114,21 +114,6 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
 int hash_block(const char *algo_name, const void *data, unsigned int len,
 	       uint8_t *output, int *output_size);
 
-/**
- * hash_show() - Print out a hash algorithm and value
- *
- * You will get a message like this (without a newline at the end):
- *
- * "sha1 for 9eb3337c ... 9eb3338f ==> 7942ef1df479fd3130f716eb9613d107dab7e257"
- *
- * @algo:		Algorithm used for hash
- * @addr:		Address of data that was hashed
- * @len:		Length of data that was hashed
- * @output:		Hash value to display
- */
-void hash_show(struct hash_algo *algo, ulong addr, ulong len,
-	       uint8_t *output);
-
 #endif /* !USE_HOSTCC */
 
 /**