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#ifndef NASM_RAA_H
#define NASM_RAA_H 1
#include "compiler.h"
/*
* Routines to manage a dynamic random access array of int64_ts which
* may grow in size to be more than the largest single malloc'able
* chunk.
*/
#define RAA_BLKSHIFT 15 /* 2**this many longs allocated at once */
#define RAA_BLKSIZE (1 << RAA_BLKSHIFT)
#define RAA_LAYERSHIFT 15 /* 2**this many _pointers_ allocated */
#define RAA_LAYERSIZE (1 << RAA_LAYERSHIFT)
typedef struct RAA RAA;
typedef union RAA_UNION RAA_UNION;
typedef struct RAA_LEAF RAA_LEAF;
typedef struct RAA_BRANCH RAA_BRANCH;
struct RAA {
/*
* Number of layers below this one to get to the real data. 0
* means this structure is a leaf, holding RAA_BLKSIZE real
* data items; 1 and above mean it's a branch, holding
* RAA_LAYERSIZE pointers to the next level branch or leaf
* structures.
*/
int layers;
/*
* Number of real data items spanned by one position in the
* `data' array at this level. This number is 0 trivially, for
* a leaf (level 0): for a level 1 branch it should be
* RAA_BLKSHIFT, and for a level 2 branch it's
* RAA_LAYERSHIFT+RAA_BLKSHIFT.
*/
int shift;
union RAA_UNION {
struct RAA_LEAF {
int64_t data[RAA_BLKSIZE];
} l;
struct RAA_BRANCH {
struct RAA *data[RAA_LAYERSIZE];
} b;
} u;
};
struct RAA *raa_init(void);
void raa_free(struct RAA *);
int64_t raa_read(struct RAA *, int32_t);
struct RAA *raa_write(struct RAA *r, int32_t posn, int64_t value);
#endif /* NASM_RAA_H */
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