+struct cf_section;
+extern struct cf_section fbpar_cf;
+extern struct fb_params fbpar_def;
+
+struct fastbuf *bopen_file(const char *name, int mode, struct fb_params *params); /* Use params==NULL for defaults */
+struct fastbuf *bopen_file_try(const char *name, int mode, struct fb_params *params);
+struct fastbuf *bopen_tmp_file(struct fb_params *params);
+struct fastbuf *bopen_fd(int fd, struct fb_params *params);
+
+/* FastIO on standard files (shortcuts for FB_STD) */
+
+struct fastbuf *bopen(const char *name, uns mode, uns buflen);
+struct fastbuf *bopen_try(const char *name, uns mode, uns buflen);
+struct fastbuf *bopen_tmp(uns buflen);
+struct fastbuf *bfdopen(int fd, uns buflen);
+struct fastbuf *bfdopen_shared(int fd, uns buflen);
+void bfilesync(struct fastbuf *b);
+
+/* Temporary files */
+
+#define TEMP_FILE_NAME_LEN 256
+void temp_file_name(char *name);
+void bfix_tmp_file(struct fastbuf *fb, const char *name);
+
+/* Internal functions of some file back-ends */
+
+struct fastbuf *bfdopen_internal(int fd, const char *name, uns buflen);
+struct fastbuf *bfmmopen_internal(int fd, const char *name, uns mode);
+
+extern uns fbdir_cheat;
+struct asio_queue;
+struct fastbuf *fbdir_open_fd_internal(int fd, const char *name, struct asio_queue *io_queue, uns buffer_size, uns read_ahead, uns write_back);
+
+void bclose_file_helper(struct fastbuf *f, int fd, int is_temp_file);
+
+/* FastIO on in-memory streams */
+
+struct fastbuf *fbmem_create(uns blocksize); /* Create stream and return its writing fastbuf */
+struct fastbuf *fbmem_clone_read(struct fastbuf *); /* Create reading fastbuf */
+
+/* FastI on file descriptors with limit */
+
+struct fastbuf *bopen_limited_fd(int fd, uns bufsize, uns limit);
+
+/* FastIO on static buffers */
+
+void fbbuf_init_read(struct fastbuf *f, byte *buffer, uns size, uns can_overwrite);
+void fbbuf_init_write(struct fastbuf *f, byte *buffer, uns size);
+static inline uns
+fbbuf_count_written(struct fastbuf *f)
+{
+ return f->bptr - f->bstop;
+}
+
+/* FastIO on recyclable growing buffers */
+
+struct fastbuf *fbgrow_create(unsigned basic_size);
+void fbgrow_reset(struct fastbuf *b); /* Reset stream and prepare for writing */
+void fbgrow_rewind(struct fastbuf *b); /* Prepare for reading */
+
+/* FastO on memory pools */
+
+struct mempool;
+struct fbpool {
+ struct fastbuf fb;
+ struct mempool *mp;
+};
+
+void fbpool_init(struct fbpool *fb); /* Initialize a new fastbuf */
+void fbpool_start(struct fbpool *fb, struct mempool *mp, uns init_size);
+ /* Start a new continuous block and prepare for writing (see mp_start()) */
+void *fbpool_end(struct fbpool *fb); /* Close the block and return its address (see mp_end()).
+ The length can be determined with mp_size(mp, ptr). */
+
+/* FastO with atomic writes for multi-threaded programs */
+
+struct fb_atomic {
+ struct fastbuf fb;
+ struct fb_atomic_file *af;
+ byte *expected_max_bptr;
+ uns slack_size;
+};
+#define FB_ATOMIC(f) ((struct fb_atomic *)(f)->is_fastbuf)
+
+struct fastbuf *fbatomic_open(const char *name, struct fastbuf *master, uns bufsize, int record_len);
+void fbatomic_internal_write(struct fastbuf *b);
+
+static inline void
+fbatomic_commit(struct fastbuf *b)
+{
+ if (b->bptr >= ((struct fb_atomic *)b)->expected_max_bptr)
+ fbatomic_internal_write(b);
+}
+
+/* Configuring stream parameters */
+
+enum bconfig_type {
+ BCONFIG_IS_TEMP_FILE, /* 0=normal file, 1=temporary file, 2=shared fd */
+ BCONFIG_KEEP_BACK_BUF, /* Optimize for bi-directional access */
+};
+
+int bconfig(struct fastbuf *f, uns type, int data);
+
+/* Universal functions working on all fastbuf's */
+