avoid a possible sign-extension for offsets/sizes in SGI

[imager.git] / iolayer.h

diff --git a/iolayer.h b/iolayer.h
index ec164c0f3f4fc9fb2e5e5e999602956b2a8e4731..77d3c9185aad965829572f60190304593c30c28a 100644 (file)
--- a/iolayer.h
+++ b/iolayer.h
@@ -4,10 +4,9 @@
 
 /* How the IO layer works:
  * 
- * Start by getting an io_glue object.  Then define its
- * datasource via io_obj_setp_buffer or io_obj_setp_cb.  Before
- * using the io_glue object be sure to call io_glue_commit_types().
- * After that data can be read via the io_glue->readcb() method.
+ * Start by getting an io_glue object by calling the appropriate
+ * io_new...() function.  After that data can be read via the
+ * io_glue->readcb() method.
  *
  */
 
@@ -20,15 +19,29 @@
 #define IO_TEMP_SEEK 1<<1L
 
 
-void io_glue_commit_types(io_glue *ig);
 void io_glue_gettypes    (io_glue *ig, int reqmeth);
 
 /* XS functions */
-io_glue *io_new_fd(int fd);
-io_glue *io_new_bufchain(void);
-io_glue *io_new_buffer(char *data, size_t len, i_io_closebufp_t closecb, void *closedata);
-io_glue *io_new_cb(void *p, i_io_readl_t readcb, i_io_writel_t writecb, i_io_seekl_t seekcb, i_io_closel_t closecb, i_io_destroyl_t destroycb);
+io_glue *im_io_new_fd(pIMCTX, int fd);
+io_glue *im_io_new_bufchain(pIMCTX);
+io_glue *im_io_new_buffer(pIMCTX, const char *data, size_t len, i_io_closebufp_t closecb, void *closedata);
+io_glue *im_io_new_cb(pIMCTX, void *p, i_io_readl_t readcb, i_io_writel_t writecb, i_io_seekl_t seekcb, i_io_closel_t closecb, i_io_destroyl_t destroycb);
 size_t   io_slurp(io_glue *ig, unsigned char **c);
 void     io_glue_destroy(io_glue *ig);
 
+void i_io_dump(io_glue *ig, int flags);
+
+/* Buffered I/O */
+extern int i_io_getc_imp(io_glue *ig);
+extern int i_io_peekc_imp(io_glue *ig);
+extern ssize_t i_io_peekn(io_glue *ig, void *buf, size_t size);
+extern int i_io_putc_imp(io_glue *ig, int c);
+extern ssize_t i_io_read(io_glue *ig, void *buf, size_t size);
+extern ssize_t i_io_write(io_glue *ig, const void *buf, size_t size);
+extern off_t i_io_seek(io_glue *ig, off_t offset, int whence);
+extern int i_io_flush(io_glue *ig);
+extern int i_io_close(io_glue *ig);
+extern int i_io_set_buffered(io_glue *ig, int buffered);
+extern ssize_t i_io_gets(io_glue *ig, char *, size_t, int);
+
 #endif /* _IOLAYER_H_ */