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#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef I_DBM
# include <dbm.h>
#else
# ifdef I_RPCSVC_DBM
# include <rpcsvc/dbm.h>
# endif
#endif
#ifndef HAS_DBMINIT_PROTO
int dbminit(char* filename);
int dbmclose(void);
datum fetch(datum key);
int store(datum key, datum dat);
int delete(datum key);
datum firstkey(void);
datum nextkey(datum key);
#endif
#ifdef DBM_BUG_DUPLICATE_FREE
/*
* DBM on at least Ultrix and HPUX call dbmclose() from dbminit(),
* resulting in duplicate free() because dbmclose() does *not*
* check if it has already been called for this DBM.
* If some malloc/free calls have been done between dbmclose() and
* the next dbminit(), the memory might be used for something else when
* it is freed.
* Verified to work on ultrix4.3. Probably will work on HP/UX.
* Set DBM_BUG_DUPLICATE_FREE in the extension hint file.
*/
/* Close the previous dbm, and fail to open a new dbm */
#define dbmclose() ((void) dbminit("/non/exist/ent"))
#endif
#include <fcntl.h>
#define fetch_key 0
#define store_key 1
#define fetch_value 2
#define store_value 3
typedef struct {
void * dbp ;
SV * filter[4];
int filtering ;
} ODBM_File_type;
typedef ODBM_File_type * ODBM_File ;
typedef datum datum_key ;
typedef datum datum_key_copy ;
typedef datum datum_value ;
#define odbm_FETCH(db,key) fetch(key)
#define odbm_STORE(db,key,value,flags) store(key,value)
#define odbm_DELETE(db,key) delete(key)
#define odbm_FIRSTKEY(db) firstkey()
#define odbm_NEXTKEY(db,key) nextkey(key)
#define MY_CXT_KEY "ODBM_File::_guts" XS_VERSION
typedef struct {
int x_dbmrefcnt;
} my_cxt_t;
START_MY_CXT
#define dbmrefcnt (MY_CXT.x_dbmrefcnt)
#ifndef DBM_REPLACE
#define DBM_REPLACE 0
#endif
MODULE = ODBM_File PACKAGE = ODBM_File PREFIX = odbm_
BOOT:
{
MY_CXT_INIT;
}
ODBM_File
odbm_TIEHASH(dbtype, filename, flags, mode)
char * dbtype
char * filename
int flags
int mode
CODE:
{
char *tmpbuf;
void * dbp ;
dMY_CXT;
if (dbmrefcnt++)
croak("Old dbm can only open one database");
Newx(tmpbuf, strlen(filename) + 5, char);
SAVEFREEPV(tmpbuf);
sprintf(tmpbuf,"%s.dir",filename);
if (stat(tmpbuf, &PL_statbuf) < 0) {
if (flags & O_CREAT) {
if (mode < 0 || close(creat(tmpbuf,mode)) < 0)
croak("ODBM_File: Can't create %s", filename);
sprintf(tmpbuf,"%s.pag",filename);
if (close(creat(tmpbuf,mode)) < 0)
croak("ODBM_File: Can't create %s", filename);
}
else
croak("ODBM_FILE: Can't open %s", filename);
}
dbp = (void*)(dbminit(filename) >= 0 ? &dbmrefcnt : 0);
RETVAL = (ODBM_File)safecalloc(1, sizeof(ODBM_File_type));
RETVAL->dbp = dbp ;
}
OUTPUT:
RETVAL
void
DESTROY(db)
ODBM_File db
PREINIT:
dMY_CXT;
int i = store_value;
CODE:
dbmrefcnt--;
dbmclose();
do {
if (db->filter[i])
SvREFCNT_dec(db->filter[i]);
} while (i-- > 0);
safefree(db);
datum_value
odbm_FETCH(db, key)
ODBM_File db
datum_key_copy key
int
odbm_STORE(db, key, value, flags = DBM_REPLACE)
ODBM_File db
datum_key key
datum_value value
int flags
CLEANUP:
if (RETVAL) {
if (RETVAL < 0 && errno == EPERM)
croak("No write permission to odbm file");
croak("odbm store returned %d, errno %d, key \"%s\"",
RETVAL,errno,key.dptr);
}
int
odbm_DELETE(db, key)
ODBM_File db
datum_key key
datum_key
odbm_FIRSTKEY(db)
ODBM_File db
datum_key
odbm_NEXTKEY(db, key)
ODBM_File db
datum_key key
#define setFilter(type) \
{ \
if (db->type) \
RETVAL = sv_mortalcopy(db->type) ; \
ST(0) = RETVAL ; \
if (db->type && (code == &PL_sv_undef)) { \
SvREFCNT_dec(db->type) ; \
db->type = Nullsv ; \
} \
else if (code) { \
if (db->type) \
sv_setsv(db->type, code) ; \
else \
db->type = newSVsv(code) ; \
} \
}
SV *
filter_fetch_key(db, code)
ODBM_File db
SV * code
SV * RETVAL = &PL_sv_undef ;
ALIAS:
ODBM_File::filter_fetch_key = fetch_key
ODBM_File::filter_store_key = store_key
ODBM_File::filter_fetch_value = fetch_value
ODBM_File::filter_store_value = store_value
CODE:
DBM_setFilter(db->filter[ix], code);
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