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/* RCSid: $Id$ */ |
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/* RCSid $Id$ */ |
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/* |
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* Header file for general associative table lookup routines |
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*/ |
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#ifndef _MGF_LOOKUP_H_ |
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#define _MGF_LOOKUP_H_ |
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#ifndef _RAD_LOOKUP_H_ |
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#define _RAD_LOOKUP_H_ |
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#include <string.h> /* strcmp() */ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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typedef void lut_free_t(void*); |
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typedef struct { |
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char *key; /* key name */ |
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long hval; /* key hash value (for efficiency) */ |
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char *data; /* pointer to client data */ |
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char *key; /* key name */ |
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unsigned long hval; /* key hash value (for efficiency) */ |
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char *data; /* pointer to client data */ |
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} LUENT; |
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typedef struct { |
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unsigned long (*hashf)(char *); /* key hash function */ |
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int (*keycmp)(const char *, const char *); /* key comparison function */ |
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void (*freek)(char *); /* free a key */ |
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void (*freed)(char *); /* free the data */ |
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int tsiz; /* current table size */ |
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LUENT *tabl; /* table, if allocated */ |
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int ndel; /* number of deleted entries */ |
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unsigned long (*hashf)(char*); /* key hash function */ |
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int (*keycmp)(const char*, const char*); /* key comparison function */ |
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lut_free_t *freek; /* free a key */ |
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lut_free_t *freed; /* free the data */ |
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int tsiz; /* current table size */ |
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LUENT *tabl; /* table, if allocated */ |
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int ndel; /* number of deleted entries */ |
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} LUTAB; |
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#define LU_SINIT(fk,fd) {lu_shash,strcmp,(void (*)())(fk),\ |
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(void (*)())(fd),0,NULL,0} |
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#undef strcmp |
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#define LU_SINIT(fk,fd) {lu_shash,strcmp,fk,\ |
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fd,0,NULL,0} |
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/* |
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* The lu_init routine is called to initialize a table. The number of |
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* It is therefore an error to reuse or do anything with the key |
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* field after calling lu_delete. |
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* |
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* The lu_doall routine loops through every filled table entry, calling |
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* the given function once on each entry. If a NULL pointer is passed |
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* for this function, then lu_doall simply returns the total number of |
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* active entries. Otherwise, it returns the sum of all the function |
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* evaluations. |
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* |
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* The lu_done routine calls the given free function once for each |
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* assigned table entry (i.e. each entry with an assigned key value). |
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* The user must define these routines to free the key and the data |
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* allocated table itself. |
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*/ |
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extern int lu_init(LUTAB *, int); |
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extern LUENT *lu_find(LUTAB *, char *); |
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extern void lu_delete(LUTAB *, char *); |
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extern void lu_done(LUTAB *); |
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extern unsigned long lu_shash(char *); |
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extern int lu_init(LUTAB *tbl, int nel); |
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extern unsigned long lu_shash(char *s); |
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extern LUENT *lu_find(LUTAB *tbl, char *key); |
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extern void lu_delete(LUTAB *tbl, char *key); |
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extern int lu_doall(LUTAB *tbl, int (*f)(LUENT*)); |
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extern void lu_done(LUTAB *tbl); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _MGF_LOOKUP_H_ */ |
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#endif /* _RAD_LOOKUP_H_ */ |
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