Remove casual un-const casting in various places

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

8 files changed, 15 insertions, 13 deletions

diff --git a/include/sqfs/predef.h b/include/sqfs/predef.h
index 8a456d8..6296b4b 100644
--- a/include/sqfs/predef.h
+++ b/include/sqfs/predef.h
@@ -152,8 +152,10 @@ static SQFS_INLINE void sqfs_destroy(void *obj)
  */
 static SQFS_INLINE void *sqfs_copy(const void *obj)
 {
-	if (((sqfs_object_t *)obj)->copy != NULL)
-		return ((sqfs_object_t *)obj)->copy((sqfs_object_t *)obj);
+	if (((const sqfs_object_t *)obj)->copy != NULL) {
+		return ((const sqfs_object_t *)obj)->
+			copy((const sqfs_object_t *)obj);
+	}
 
 	return NULL;
 }
diff --git a/lib/common/comp_lzo.c b/lib/common/comp_lzo.c
index b6496b2..e327d06 100644
--- a/lib/common/comp_lzo.c
+++ b/lib/common/comp_lzo.c
@@ -206,7 +206,7 @@ static void lzo_get_configuration(const sqfs_compressor_t *base,
 
 static sqfs_object_t *lzo_create_copy(const sqfs_object_t *cmp)
 {
-	lzo_compressor_t *other = (lzo_compressor_t *)cmp;
+	const lzo_compressor_t *other = (const lzo_compressor_t *)cmp;
 	lzo_compressor_t *lzo;
 
 	lzo = calloc(1, sizeof(*lzo) + other->buf_size);
diff --git a/lib/common/hardlink.c b/lib/common/hardlink.c
index 63621a4..a3ba4f7 100644
--- a/lib/common/hardlink.c
+++ b/lib/common/hardlink.c
@@ -73,7 +73,7 @@ fail_insert:
 
 static int compare_inum(const void *lhs, const void *rhs)
 {
-	sqfs_u32 l = *((sqfs_u32 *)lhs), r = *((sqfs_u32 *)rhs);
+	sqfs_u32 l = *((const sqfs_u32 *)lhs), r = *((const sqfs_u32 *)rhs);
 
 	return l < r ? -1 : (l > r ? 1 : 0);
 }
diff --git a/lib/sqfs/comp/gzip.c b/lib/sqfs/comp/gzip.c
index 9be84db..91cd87e 100644
--- a/lib/sqfs/comp/gzip.c
+++ b/lib/sqfs/comp/gzip.c
@@ -138,7 +138,7 @@ static int find_strategy(gzip_compressor_t *gzip, const sqfs_u8 *in,
 
 		strategy = flag_to_zlib_strategy(i);
 
-		gzip->strm.next_in = (void *)in;
+		gzip->strm.next_in = (z_const Bytef *)in;
 		gzip->strm.avail_in = size;
 		gzip->strm.next_out = out;
 		gzip->strm.avail_out = outsize;
@@ -189,7 +189,7 @@ static sqfs_s32 gzip_do_block(sqfs_compressor_t *base, const sqfs_u8 *in,
 	if (ret != Z_OK)
 		return SQFS_ERROR_COMPRESSOR;
 
-	gzip->strm.next_in = (void *)in;
+	gzip->strm.next_in = (const void *)in;
 	gzip->strm.avail_in = size;
 	gzip->strm.next_out = out;
 	gzip->strm.avail_out = outsize;
diff --git a/lib/sqfs/comp/lz4.c b/lib/sqfs/comp/lz4.c
index f326870..152ae75 100644
--- a/lib/sqfs/comp/lz4.c
+++ b/lib/sqfs/comp/lz4.c
@@ -75,10 +75,10 @@ static sqfs_s32 lz4_comp_block(sqfs_compressor_t *base, const sqfs_u8 *in,
 		return SQFS_ERROR_ARG_INVALID;
 
 	if (lz4->high_compression) {
-		ret = LZ4_compress_HC((void *)in, (void *)out,
+		ret = LZ4_compress_HC((const void *)in, (void *)out,
 				      size, outsize, LZ4HC_CLEVEL_MAX);
 	} else {
-		ret = LZ4_compress_default((void *)in, (void *)out,
+		ret = LZ4_compress_default((const void *)in, (void *)out,
 					   size, outsize);
 	}
 
@@ -97,7 +97,7 @@ static sqfs_s32 lz4_uncomp_block(sqfs_compressor_t *base, const sqfs_u8 *in,
 	if (outsize >= 0x7FFFFFFF)
 		return SQFS_ERROR_ARG_INVALID;
 
-	ret = LZ4_decompress_safe((void *)in, (void *)out, size, outsize);
+	ret = LZ4_decompress_safe((const void *)in, (void *)out, size, outsize);
 
 	if (ret < 0)
 		return SQFS_ERROR_COMPRESSOR;
diff --git a/lib/sqfs/inode.c b/lib/sqfs/inode.c
index 02d23e2..01e5ebe 100644
--- a/lib/sqfs/inode.c
+++ b/lib/sqfs/inode.c
@@ -349,8 +349,8 @@ int sqfs_inode_unpack_dir_index_entry(const sqfs_inode_generic_t *inode,
 				      size_t index)
 {
 	sqfs_dir_index_t ent;
+	const char *ptr;
 	size_t offset;
-	char *ptr;
 
 	if (inode->base.type != SQFS_INODE_EXT_DIR) {
 		if (inode->base.type == SQFS_INODE_DIR)
@@ -360,7 +360,7 @@ int sqfs_inode_unpack_dir_index_entry(const sqfs_inode_generic_t *inode,
 	}
 
 	offset = 0;
-	ptr = (char *)inode->extra;
+	ptr = (const char *)inode->extra;
 
 	for (;;) {
 		if (offset >= inode->payload_bytes_used)
diff --git a/lib/tar/number.c b/lib/tar/number.c
index 06d5317..50cb658 100644
--- a/lib/tar/number.c
+++ b/lib/tar/number.c
@@ -69,7 +69,7 @@ fail_ov:
 
 int read_number(const char *str, int digits, sqfs_u64 *out)
 {
-	if (*((unsigned char *)str) & 0x80)
+	if (*((const unsigned char *)str) & 0x80)
 		return read_binary(str, digits, out);
 
 	return read_octal(str, digits, out);
diff --git a/tests/rbtree.c b/tests/rbtree.c
index fc607a5..26f3ac1 100644
--- a/tests/rbtree.c
+++ b/tests/rbtree.c
@@ -11,7 +11,7 @@
 
 static int key_compare(const void *a, const void *b)
 {
-	return *((sqfs_s32 *)a) - *((sqfs_s32 *)b);
+	return *((const sqfs_s32 *)a) - *((const sqfs_s32 *)b);
 }
 
 static size_t count_nodes_dfs(rbtree_node_t *n)