ext/dnet/blob.h

   1 /*
   2  * blob.h
   3  *
   4  * Binary blob handling.
   5  *
   6  * Copyright (c) 2002 Dug Song <dugsong@monkey.org>
   7  *
   8  * $Id: blob.h,v 1.2 2002/04/05 03:06:44 dugsong Exp $
   9  */
  10
  11 #ifndef DNET_BLOB_H
  12 #define DNET_BLOB_H
  13
  14 typedef struct blob {
  15         u_char          *base;          /* start of data */
  16         int              off;           /* offset into data */
  17         int              end;           /* end of data */
  18         int              size;          /* size of allocation */
  19 } blob_t;
  20
  21 __BEGIN_DECLS
  22 blob_t  *blob_new(void);
  23
  24 int      blob_read(blob_t *b, void *buf, int len);
  25 int      blob_write(blob_t *b, const void *buf, int len);
  26
  27 int      blob_seek(blob_t *b, int off, int whence);
  28 #define  blob_skip(b, l)        blob_seek(b, l, SEEK_CUR)
  29 #define  blob_rewind(b)         blob_seek(b, 0, SEEK_SET)
  30
  31 #define  blob_offset(b)         ((b)->off)
  32 #define  blob_left(b)           ((b)->end - (b)->off)
  33
  34 int      blob_index(blob_t *b, const void *buf, int len);
  35 int      blob_rindex(blob_t *b, const void *buf, int len);
  36
  37 int      blob_pack(blob_t *b, const char *fmt, ...);
  38 int      blob_unpack(blob_t *b, const char *fmt, ...);
  39
  40 int      blob_insert(blob_t *b, const void *buf, int len);
  41 int      blob_delete(blob_t *b, void *buf, int len);
  42
  43 int      blob_print(blob_t *b, char *style, int len);
  44
  45 blob_t  *blob_free(blob_t *b);
  46
  47 int      blob_register_alloc(size_t size, void *(*bmalloc)(size_t),
  48             void (*bfree)(void *), void *(*brealloc)(void *, size_t));
  49 #ifdef va_start
  50 typedef int (*blob_fmt_cb)(int pack, int len, blob_t *b, va_list *arg);
  51
  52 int      blob_register_pack(char c, blob_fmt_cb fmt_cb);
  53 #endif
  54 __END_DECLS
  55
  56 #endif /* DNET_BLOB_H */