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 void skip_var_string(unsigned char* source, int *offset);
  17
  18 // For streaming varints from a specialized data buffer that is first
  19 // delta-encoded, then varint-encoded.
  20 struct varint_unpacker {
  21   char*    data;   // pointer to stream of bytes
  22   int      index;  // byte index from start of data
  23   int      limit;  // ending value for 'index'
  24   uword_t  word;   // scratch word used only if the input was a fixnum
  25 };
  26
  27 void varint_unpacker_init(struct varint_unpacker*, lispobj);
  28 int varint_unpack(struct varint_unpacker*, int*);
  29 void skip_data_stream(struct varint_unpacker* unpacker);
  30 unsigned char* decompress_vector(lispobj vector, size_t *result_size);
  31
  32 #endif /* _VAR_IO_H_ */