liblbx: Parameterise I/O functions to allow custom streams.

[liblbx.git] / src / lbx.h

diff --git a/src/lbx.h b/src/lbx.h
index 89d4bb4201bd31e471374c964524e520be1b4512..a788318bda0381840f958b83ca3d8e3de747f6b0 100644 (file)
--- a/src/lbx.h
+++ b/src/lbx.h
@@ -13,6 +13,24 @@ enum {
 };
 extern int lbx_errno;
 
+struct lbx_file_ops {
+       size_t (*read)(void *buf, size_t size, void *handle);
+       int    (*seek)(void *handle, long offset, int whence);
+       long   (*tell)(void *handle);
+       int    (*eof) (void *handle);
+};
+
+struct lbx_pipe_state {
+       FILE *f;
+       long offset;
+};
+
+/* Default I/O operations for ordinary files. */
+extern const struct lbx_file_ops lbx_default_fops;
+
+/* I/O operations for un-seekable files (e.g. pipes). */
+extern const struct lbx_file_ops lbx_pipe_fops;
+
 /* Opaque */
 typedef struct lbx_state LBX;
 
@@ -22,6 +40,8 @@ struct lbx_statbuf {
 };
 
 /* Archive operations */
+LBX   *lbx_open(void *handle, const struct lbx_file_ops *fops,
+                int (*destructor)(void *handle), const char *name);
 LBX   *lbx_fopen(FILE *, const char *);
 LBX   *lbx_mopen(void *, size_t, const char *);
 int    lbx_close(LBX *);