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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-03 19:43:54 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-04 00:58:53 +0100
commit44c81eeffe9c8820b1009a7a5c728782aa5ebf40 (patch)
tree544eceb6dc5633018e5147c88ca9b07dd0fb54d9 /include/sqfs/io.h
parent6f47796dc0761fac359ec59ce26c7af5154e538d (diff)
Add a generic copying mechanism to sqfs_object_t
This patch adds a deep-copy callback to sqfs_object_t and removes the copying mechanism from sqfs_compressor_t. This is also interesting for other types. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'include/sqfs/io.h')
-rw-r--r--include/sqfs/io.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sqfs/io.h b/include/sqfs/io.h
index 578c4fb..18c6810 100644
--- a/include/sqfs/io.h
+++ b/include/sqfs/io.h
@@ -63,6 +63,11 @@ typedef enum {
* @extends sqfs_object_t
*
* @brief Abstracts file I/O to make it easy to embedd SquashFS.
+ *
+ * Files are only copyable if they are read only, i.e. if a file has been
+ * opened with write access, @ref sqfs_copy will always return NULL. The
+ * other data types inside libsquashfs assume this to hold for all
+ * implementations of this interface.
*/
struct sqfs_file_t {
sqfs_object_t base;