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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Generic vector interface header.
* Copyright (C) 1997, 98 Kunihiro Ishiguro
*/
#ifndef _ZEBRA_VECTOR_H
#define _ZEBRA_VECTOR_H
#include "memory.h"
#ifdef __cplusplus
extern "C" {
#endif
/* struct for vector */
struct _vector {
/* active: index of last non-NULL item (+1)
* count: number of non-NULL items (+1)
*
* the two will be different if a slot is set to NULL (without pulling
* up later items in the array). Whether this happens depends on
* which vector functions are used. If no empty slots are used, the
* two fields will be identical.
*
* alloced: size of array pointed to by index. If this is 0, index
* points at a global variable rather than a malloc'd bit of memory.
* The vector code will convert to malloc'd memory if necessary to
* perform updates.
*/
unsigned int active;
unsigned int alloced;
unsigned int count;
/* whether struct _vector itself is dynamically allocated */
bool dynamic;
void **index; /* index to data */
};
typedef struct _vector *vector;
#define VECTOR_MIN_SIZE 1
/* (Sometimes) usefull macros. This macro convert index expression to
array expression. */
/* Reference slot at given index, caller must ensure slot is active */
#define vector_slot(V,I) ((V)->index[(I)])
/* Number of active slots.
* Note that this differs from vector_count() as it the count returned
* will include any empty slots
*/
#define vector_active(V) ((V)->active)
/* Prototypes. */
extern vector vector_init(unsigned int size);
extern void vector_ensure(vector v, unsigned int num);
extern int vector_empty_slot(vector v);
extern int vector_set(vector v, void *val);
extern int vector_set_index(vector v, unsigned int i, void *val);
extern void vector_unset(vector v, unsigned int i);
extern void vector_unset_value(vector v, void *val);
extern void vector_remove(vector v, unsigned int ix);
extern void vector_compact(vector v);
static inline unsigned int vector_count(vector v)
{
return v->count;
}
extern void vector_free(vector v);
extern void *vector_lookup(vector, unsigned int);
extern void *vector_lookup_ensure(vector, unsigned int);
extern void vector_to_array(vector v, void ***dest, int *argc);
extern vector array_to_vector(void **src, int argc);
#ifdef __cplusplus
}
#endif
#endif /* _ZEBRA_VECTOR_H */
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