src/runtime/var-io.h

   1 /*
   2  * This software is part of the SBCL system. See the README file for
   3  * more information.
   4  *
   5  * This software is derived from the CMU CL system, which was
   6  * written at Carnegie Mellon University and released into the
   7  * public domain. The software is in the public domain and is
   8  * provided with absolutely no warranty. See the COPYING and CREDITS
   9  * files for more information.
  10  */
  11
  12 #ifndef _VAR_IO_H_
  13 #define _VAR_IO_H_
  14
  15 extern int read_var_integer(unsigned char *source, int *offset);
  16
  17 // For streaming varints from a specialized data buffer that is first
  18 // delta-encoded, then varint-encoded.
  19 struct varint_unpacker {
  20   char*    data;   // pointer to stream of bytes
  21   int      index;  // byte index from start of data
  22   int      limit;  // ending value for 'index'
  23   uword_t  word;   // scratch word used only if the input was a fixnum
  24 };
  25
  26 void varint_unpacker_init(struct varint_unpacker*, lispobj);
  27 int varint_unpack(struct varint_unpacker*, int*);
  28
  29 #endif /* _VAR_IO_H_ */