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/* ********************************************************************
*
* Varray.h -- header file for varray.c which provides a generic
* set of functions to handle variable sized arrays.
*
* originally by Jiang Wu
* ********************************************************************/
#ifndef _VARRAY_H_
#define _VARRAY_H_
typedef struct _varray {
size_t nobj; /* number of objects in this array */
size_t maxObj; /* max. number of objects in this array */
size_t size; /* size of each element in the array */
void *val; /* array of elements */
} Varray;
/* type for custom copying function */
typedef void (*CopyingFunct) (void *from, void *to);
#define VARRAY_INITIAL_SIZE 32
#define ENLARGE_VARRAY(ARRAY, INC) \
(ARRAY)->maxObj += (INC); \
(ARRAY)->val = (void *) realloc((ARRAY)->val, \
(ARRAY)->size * (ARRAY)->maxObj)
#define VARRAY_NTH(VAL, SIZE, N) (((char *) (VAL)) + (SIZE) * (N))
#define FreeVarray(ARRAY) \
if ((ARRAY) != NULL) { free((ARRAY)->val); free((ARRAY)); (ARRAY) = NULL ; }
#define ModifyVarray(ARRAY, N, NEW, COPY) \
if ((N) < (ARRAY)->nobj) \
(COPY)(VARRAY_NTH((ARRAY)->val, (ARRAY)->size, (N)), (NEW))
#define GetVarray(ARRAY, N) \
((N) < (ARRAY)->nobj ? VARRAY_NTH((ARRAY)->val, (ARRAY)->size, (N)) \
: NULL)
extern Varray *NewVarray(size_t nobj, size_t size);
extern int AppendVarray(Varray *array, void *value, CopyingFunct copy);
#endif /* _VARRAY_H_ */
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