From ba99ef34e7b073c03519ef74f017091de6c9bee8 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Mon, 12 Jun 2023 21:21:40 +0200
Subject: Move sqfs_istream_t & sqfs_ostream_t into libsquashfs

For now, only the interfaces and helper functions are moved, the
concrete implementations remain in libio.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
 include/io/istream.h | 102 ---------------------------------------------------
 1 file changed, 102 deletions(-)

(limited to 'include/io/istream.h')

diff --git a/include/io/istream.h b/include/io/istream.h
index f4ffcb2..f41be2e 100644
--- a/include/io/istream.h
+++ b/include/io/istream.h
@@ -8,66 +8,6 @@
 #define IO_ISTREAM_H
 
 #include "sqfs/predef.h"
-#include "io/ostream.h"
-
-typedef struct sqfs_istream_t sqfs_istream_t;
-
-/**
- * @interface sqfs_istream_t
- *
- * @extends sqfs_object_t
- *
- * @brief A sequential, read-only data stream.
- */
-struct sqfs_istream_t {
-	sqfs_object_t base;
-
-	/**
-	 * @brief Peek into the data buffered in an istream
-	 *
-	 * If the internal buffer is empty, the function tries to fetch more,
-	 * which can block. It returns a positive return code if there is no
-	 * more data to be read, a negative error code if reading failed. Since
-	 * this and other functions can alter the buffer pointer and contents,
-	 * do not store the pointers returned here across function calls.
-	 *
-	 * Higher level functions like @ref istream_read (providing a
-	 * Unix read() style API) are built on top of this primitive.
-	 *
-	 * @param strm A pointer to an sqfs_istream_t implementation.
-	 * @param out Returns a pointer into an internal buffer on success.
-	 * @param size Returns the number of bytes available in the buffer.
-	 * @param want A number of bytes that the reader would like to have.
-	 *             If there is less than this available, the implementation
-	 *             can choose to do a blocking precache.
-	 *
-	 * @return Zero on success, a negative error code on failure,
-	 *         a postive number on EOF.
-	 */
-	int (*get_buffered_data)(sqfs_istream_t *strm, const sqfs_u8 **out,
-				 size_t *size, size_t want);
-
-	/**
-	 * @brief Mark a section of the internal buffer of an istream as used
-	 *
-	 * This marks the first `count` bytes of the internal buffer as used,
-	 * forcing get_buffered_data to return data afterwards and potentially
-	 * try to load more data.
-	 *
-	 * @param strm A pointer to an sqfs_istream_t implementation.
-	 * @param count The number of bytes used up.
-	 */
-	void (*advance_buffer)(sqfs_istream_t *strm, size_t count);
-
-	/**
-	 * @brief Get the underlying filename of an input stream.
-	 *
-	 * @param strm The input stream to get the filename from.
-	 *
-	 * @return A string holding the underlying filename.
-	 */
-	const char *(*get_filename)(sqfs_istream_t *strm);
-};
 
 enum {
 	ISTREAM_LINE_LTRIM = 0x01,
@@ -108,48 +48,6 @@ extern "C" {
 SQFS_INTERNAL int istream_get_line(sqfs_istream_t *strm, char **out,
 				   size_t *line_num, int flags);
 
-/**
- * @brief Read data from an input stream
- *
- * @memberof sqfs_istream_t
- *
- * @param strm A pointer to an input stream.
- * @param data A buffer to read into.
- * @param size The number of bytes to read into the buffer.
- *
- * @return The number of bytes actually read on success, -1 on failure,
- *         0 on end-of-file.
- */
-SQFS_INTERNAL sqfs_s32 istream_read(sqfs_istream_t *strm,
-				    void *data, size_t size);
-
-/**
- * @brief Skip over a number of bytes in an input stream.
- *
- * @memberof sqfs_istream_t
- *
- * @param strm A pointer to an input stream.
- * @param size The number of bytes to seek forward.
- *
- * @return Zero on success, -1 on failure.
- */
-SQFS_INTERNAL int istream_skip(sqfs_istream_t *strm, sqfs_u64 size);
-
-/**
- * @brief Dump data from an input stream to an output stream
- *
- * @memberof sqfs_istream_t
- *
- * @param in A pointer to an input stream to read from.
- * @param out A pointer to an output stream to append to.
- * @param size The number of bytes to copy over.
- *
- * @return The number of bytes copied on success, -1 on failure,
- *         0 on end-of-file.
- */
-SQFS_INTERNAL sqfs_s32 istream_splice(sqfs_istream_t *in, sqfs_ostream_t *out,
-				      sqfs_u32 size);
-
 #ifdef __cplusplus
 }
 #endif
-- 
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