labcomm_type_signature.h

#ifndef LABCOMM_TYPE_SIGNATURE_H
#define LABCOMM_TYPE_SIGNATURE_H

//XXX move to common.h
#ifndef labcomm_bool
#define labcomm_bool char
#define TRUE 1
#define FALSE 0
#endif

/*
 * Signature entry
 */
#ifndef LABCOMM_NO_TYPEDECL
#ifdef USE_UNIONS

/* Useful for C99 and up (or GCC without -pedantic) */ 

#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE          \
  union {                                   \
    char *bytes;                            \
    struct labcomm_signature* signature;            \
  } u;

#define LABCOMM_SIGDEF_BYTES(l, b) { l, .u.bytes=b }
#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, .u.signature=&s } // addressof, as s is pointing at the sig struct, not directly the the sig_bytes[]
#define LABCOMM_SIGDEF_END { -1, .u.bytes=0 }

#else

#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE          \
  struct {                                  \
    char *bytes;                            \
    const struct labcomm_signature *signature;            \
  } u;

#define LABCOMM_SIGDEF_BYTES(l, b) { l, { b, 0 } }
#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, { 0, &s } }
#define LABCOMM_SIGDEF_END { -1, { 0, 0 } }

#endif

struct labcomm_signature_data {
  int length;
  LABCOMM_SIGDEF_BYTES_OR_SIGNATURE
};

#endif
struct labcomm_signature {
  char *name;
  int (*encoded_size)(void *); /* void* refers to sample_data */
  int size;
  unsigned char *signature; 
  int index;
#ifndef LABCOMM_NO_TYPEDECL
  int tdsize;
  struct labcomm_signature_data *treedata;
#endif  
#ifdef LABCOMM_EXPERIMENTAL_CACHED_ENCODED_SIZE
  int cached_encoded_size; // -1 if not initialized or type is variable size
#endif
};

/* a struct for "raw" type_defs, to be used as an intermediate representation
 * between decoder and signature parser
 */

struct labcomm_raw_type_def {
    char *name;
    int index;