/*
* UCW Library -- Fast Buffered I/O
*
- * (c) 1997--2004 Martin Mares <mj@ucw.cz>
+ * (c) 1997--2007 Martin Mares <mj@ucw.cz>
* (c) 2004 Robert Spalek <robert@ucw.cz>
*
* This software may be freely distributed and used according to the terms
#ifndef _UCW_FASTBUF_H
#define _UCW_FASTBUF_H
-#ifndef EOF
-#include <stdio.h>
-#endif
-
#include <string.h>
#include <alloca.h>
-#include "lib/unaligned.h"
-
/*
* Generic buffered I/O. You supply hooks to be called for low-level operations
* (swapping of buffers, seeking and closing), we do the rest.
sh_off_t pos; /* Position of bstop in the file */
int (*refill)(struct fastbuf *); /* Get a buffer with new data */
void (*spout)(struct fastbuf *); /* Write buffer data to the file */
- void (*seek)(struct fastbuf *, sh_off_t, int); /* Slow path for bseek(), buffer already flushed */
+ int (*seek)(struct fastbuf *, sh_off_t, int); /* Slow path for bseek(), buffer already flushed; returns success */
void (*close)(struct fastbuf *); /* Close the stream */
int (*config)(struct fastbuf *, uns, int); /* Configure the stream */
int can_overwrite_buffer; /* Can the buffer be altered? (see discussion above) 0=never, 1=temporarily, 2=permanently */
void bseek(struct fastbuf *f, sh_off_t pos, int whence);
void bsetpos(struct fastbuf *f, sh_off_t pos);
void brewind(struct fastbuf *f);
-sh_off_t bfilesize(struct fastbuf *f);
+sh_off_t bfilesize(struct fastbuf *f); // -1 if not seekable
static inline sh_off_t btell(struct fastbuf *f)
{
return f->bufend - f->bptr;
}
-int bgetw_slow(struct fastbuf *f);
-static inline int bgetw(struct fastbuf *f)
-{
- int w;
- if (bavailr(f) >= 2)
- {
- w = GET_U16(f->bptr);
- f->bptr += 2;
- return w;
- }
- else
- return bgetw_slow(f);
-}
-
-u32 bgetl_slow(struct fastbuf *f);
-static inline u32 bgetl(struct fastbuf *f)
-{
- u32 l;
- if (bavailr(f) >= 4)
- {
- l = GET_U32(f->bptr);
- f->bptr += 4;
- return l;
- }
- else
- return bgetl_slow(f);
-}
-
-u64 bgetq_slow(struct fastbuf *f);
-static inline u64 bgetq(struct fastbuf *f)
-{
- u64 l;
- if (bavailr(f) >= 8)
- {
- l = GET_U64(f->bptr);
- f->bptr += 8;
- return l;
- }
- else
- return bgetq_slow(f);
-}
-
-u64 bget5_slow(struct fastbuf *f);
-static inline u64 bget5(struct fastbuf *f)
-{
- u64 l;
- if (bavailr(f) >= 5)
- {
- l = GET_U40(f->bptr);
- f->bptr += 5;
- return l;
- }
- else
- return bget5_slow(f);
-}
-
-void bputw_slow(struct fastbuf *f, uns w);
-static inline void bputw(struct fastbuf *f, uns w)
-{
- if (bavailw(f) >= 2)
- {
- PUT_U16(f->bptr, w);
- f->bptr += 2;
- }
- else
- bputw_slow(f, w);
-}
-
-void bputl_slow(struct fastbuf *f, u32 l);
-static inline void bputl(struct fastbuf *f, u32 l)
-{
- if (bavailw(f) >= 4)
- {
- PUT_U32(f->bptr, l);
- f->bptr += 4;
- }
- else
- bputl_slow(f, l);
-}
-
-void bputq_slow(struct fastbuf *f, u64 l);
-static inline void bputq(struct fastbuf *f, u64 l)
-{
- if (bavailw(f) >= 8)
- {
- PUT_U64(f->bptr, l);
- f->bptr += 8;
- }
- else
- bputq_slow(f, l);
-}
-
-void bput5_slow(struct fastbuf *f, u64 l);
-static inline void bput5(struct fastbuf *f, u64 l)
-{
- if (bavailw(f) >= 5)
- {
- PUT_U40(f->bptr, l);
- f->bptr += 5;
- }
- else
- bput5_slow(f, l);
-}
-
uns bread_slow(struct fastbuf *f, void *b, uns l, uns check);
static inline uns bread(struct fastbuf *f, void *b, uns l)
{
return bskip_slow(f, len);
}
-/* I/O on addr_int_t */
-
-#ifdef CPU_64BIT_POINTERS
-#define bputa(x,p) bputq(x,p)
-#define bgeta(x) bgetq(x)
-#else
-#define bputa(x,p) bputl(x,p)
-#define bgeta(x) bgetl(x)
-#endif
-
/* Direct I/O on buffers */
static inline uns