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