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/*
DB_File.xs -- Perl 5 interface to Berkeley DB
written by Paul Marquess <Paul.Marquess@btinternet.com>
last modified 6th March 1999
version 1.65
All comments/suggestions/problems are welcome
Copyright (c) 1995-9 Paul Marquess. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
Changes:
0.1 - Initial Release
0.2 - No longer bombs out if dbopen returns an error.
0.3 - Added some support for multiple btree compares
1.0 - Complete support for multiple callbacks added.
Fixed a problem with pushing a value onto an empty list.
1.01 - Fixed a SunOS core dump problem.
The return value from TIEHASH wasn't set to NULL when
dbopen returned an error.
1.02 - Use ALIAS to define TIEARRAY.
Removed some redundant commented code.
Merged OS2 code into the main distribution.
Allow negative subscripts with RECNO interface.
Changed the default flags to O_CREAT|O_RDWR
1.03 - Added EXISTS
1.04 - fixed a couple of bugs in hash_cb. Patches supplied by
Dave Hammen, hammen@gothamcity.jsc.nasa.gov
1.05 - Added logic to allow prefix & hash types to be specified via
Makefile.PL
1.06 - Minor namespace cleanup: Localized PrintBtree.
1.07 - Fixed bug with RECNO, where bval wasn't defaulting to "\n".
1.08 - No change to DB_File.xs
1.09 - Default mode for dbopen changed to 0666
1.10 - Fixed fd method so that it still returns -1 for
in-memory files when db 1.86 is used.
1.11 - No change to DB_File.xs
1.12 - No change to DB_File.xs
1.13 - Tidied up a few casts.
1.14 - Made it illegal to tie an associative array to a RECNO
database and an ordinary array to a HASH or BTREE database.
1.50 - Make work with both DB 1.x or DB 2.x
1.51 - Fixed a bug in mapping 1.x O_RDONLY flag to 2.x DB_RDONLY equivalent
1.52 - Patch from Gisle Aas <gisle@aas.no> to suppress "use of
undefined value" warning with db_get and db_seq.
1.53 - Added DB_RENUMBER to flags for recno.
1.54 - Fixed bug in the fd method
1.55 - Fix for AIX from Jarkko Hietaniemi
1.56 - No change to DB_File.xs
1.57 - added the #undef op to allow building with Threads support.
1.58 - Fixed a problem with the use of sv_setpvn. When the
size is specified as 0, it does a strlen on the data.
This was ok for DB 1.x, but isn't for DB 2.x.
1.59 - No change to DB_File.xs
1.60 - Some code tidy up
1.61 - added flagSet macro for DB 2.5.x
fixed typo in O_RDONLY test.
1.62 - No change to DB_File.xs
1.63 - Fix to alllow DB 2.6.x to build.
1.64 - Tidied up the 1.x to 2.x flags mapping code.
Added a patch from Mark Kettenis <kettenis@wins.uva.nl>
to fix a flag mapping problem with O_RDONLY on the Hurd
1.65 - Fixed a bug in the PUSH logic.
Added BOOT check that using 2.3.4 or greater
*/
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifndef PERL_VERSION
#include "patchlevel.h"
#define PERL_REVISION 5
#define PERL_VERSION PATCHLEVEL
#define PERL_SUBVERSION SUBVERSION
#endif
#if PERL_REVISION == 5 && (PERL_VERSION < 4 || (PERL_VERSION == 4 && PERL_SUBVERSION <= 75 ))
# define PL_sv_undef sv_undef
# define PL_na na
#endif
/* Being the Berkeley DB we prefer the <sys/cdefs.h> (which will be
* shortly #included by the <db.h>) __attribute__ to the possibly
* already defined __attribute__, for example by GNUC or by Perl. */
#undef __attribute__
/* If Perl has been compiled with Threads support,the symbol op will
be defined here. This clashes with a field name in db.h, so get rid of it.
*/
#ifdef op
#undef op
#endif
#include <db.h>
#include <fcntl.h>
/* #define TRACE */
#ifdef DB_VERSION_MAJOR
/* map version 2 features & constants onto their version 1 equivalent */
#ifdef DB_Prefix_t
#undef DB_Prefix_t
#endif
#define DB_Prefix_t size_t
#ifdef DB_Hash_t
#undef DB_Hash_t
#endif
#define DB_Hash_t u_int32_t
/* DBTYPE stays the same */
/* HASHINFO, RECNOINFO and BTREEINFO map to DB_INFO */
typedef DB_INFO INFO ;
/* version 2 has db_recno_t in place of recno_t */
typedef db_recno_t recno_t;
#define R_CURSOR DB_SET_RANGE
#define R_FIRST DB_FIRST
#define R_IAFTER DB_AFTER
#define R_IBEFORE DB_BEFORE
#define R_LAST DB_LAST
#define R_NEXT DB_NEXT
#define R_NOOVERWRITE DB_NOOVERWRITE
#define R_PREV DB_PREV
#define R_SETCURSOR 0
#define R_RECNOSYNC 0
#define R_FIXEDLEN DB_FIXEDLEN
#define R_DUP DB_DUP
#define db_HA_hash h_hash
#define db_HA_ffactor h_ffactor
#define db_HA_nelem h_nelem
#define db_HA_bsize db_pagesize
#define db_HA_cachesize db_cachesize
#define db_HA_lorder db_lorder
#define db_BT_compare bt_compare
#define db_BT_prefix bt_prefix
#define db_BT_flags flags
#define db_BT_psize db_pagesize
#define db_BT_cachesize db_cachesize
#define db_BT_lorder db_lorder
#define db_BT_maxkeypage
#define db_BT_minkeypage
#define db_RE_reclen re_len
#define db_RE_flags flags
#define db_RE_bval re_pad
#define db_RE_bfname re_source
#define db_RE_psize db_pagesize
#define db_RE_cachesize db_cachesize
#define db_RE_lorder db_lorder
#define TXN NULL,
#define do_SEQ(db, key, value, flag) (db->cursor->c_get)(db->cursor, &key, &value, flag)
#define DBT_flags(x) x.flags = 0
#define DB_flags(x, v) x |= v
#if DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 5
#define flagSet(flags, bitmask) ((flags) & (bitmask))
#else
#define flagSet(flags, bitmask) (((flags) & DB_OPFLAGS_MASK) == (bitmask))
#endif
#else /* db version 1.x */
typedef union INFO {
HASHINFO hash ;
RECNOINFO recno ;
BTREEINFO btree ;
} INFO ;
#ifdef mDB_Prefix_t
#ifdef DB_Prefix_t
#undef DB_Prefix_t
#endif
#define DB_Prefix_t mDB_Prefix_t
#endif
#ifdef mDB_Hash_t
#ifdef DB_Hash_t
#undef DB_Hash_t
#endif
#define DB_Hash_t mDB_Hash_t
#endif
#define db_HA_hash hash.hash
#define db_HA_ffactor hash.ffactor
#define db_HA_nelem hash.nelem
#define db_HA_bsize hash.bsize
#define db_HA_cachesize hash.cachesize
#define db_HA_lorder hash.lorder
#define db_BT_compare btree.compare
#define db_BT_prefix btree.prefix
#define db_BT_flags btree.flags
#define db_BT_psize btree.psize
#define db_BT_cachesize btree.cachesize
#define db_BT_lorder btree.lorder
#define db_BT_maxkeypage btree.maxkeypage
#define db_BT_minkeypage btree.minkeypage
#define db_RE_reclen recno.reclen
#define db_RE_flags recno.flags
#define db_RE_bval recno.bval
#define db_RE_bfname recno.bfname
#define db_RE_psize recno.psize
#define db_RE_cachesize recno.cachesize
#define db_RE_lorder recno.lorder
#define TXN
#define do_SEQ(db, key, value, flag) (db->dbp->seq)(db->dbp, &key, &value, flag)
#define DBT_flags(x)
#define DB_flags(x, v)
#define flagSet(flags, bitmask) ((flags) & (bitmask))
#endif /* db version 1 */
#define db_DELETE(db, key, flags) ((db->dbp)->del)(db->dbp, TXN &key, flags)
#define db_STORE(db, key, value, flags) ((db->dbp)->put)(db->dbp, TXN &key, &value, flags)
#define db_FETCH(db, key, flags) ((db->dbp)->get)(db->dbp, TXN &key, &value, flags)
#define db_sync(db, flags) ((db->dbp)->sync)(db->dbp, flags)
#define db_get(db, key, value, flags) ((db->dbp)->get)(db->dbp, TXN &key, &value, flags)
#ifdef DB_VERSION_MAJOR
#define db_DESTROY(db) ((db->dbp)->close)(db->dbp, 0)
#define db_close(db) ((db->dbp)->close)(db->dbp, 0)
#define db_del(db, key, flags) (flagSet(flags, R_CURSOR) \
? ((db->cursor)->c_del)(db->cursor, 0) \
: ((db->dbp)->del)(db->dbp, NULL, &key, flags) )
#else
#define db_DESTROY(db) ((db->dbp)->close)(db->dbp)
#define db_close(db) ((db->dbp)->close)(db->dbp)
#define db_del(db, key, flags) ((db->dbp)->del)(db->dbp, &key, flags)
#define db_put(db, key, value, flags) ((db->dbp)->put)(db->dbp, &key, &value, flags)
#endif
#define db_seq(db, key, value, flags) do_SEQ(db, key, value, flags)
typedef struct {
DBTYPE type ;
DB * dbp ;
SV * compare ;
SV * prefix ;
SV * hash ;
int in_memory ;
INFO info ;
#ifdef DB_VERSION_MAJOR
DBC * cursor ;
#endif
} DB_File_type;
typedef DB_File_type * DB_File ;
typedef DBT DBTKEY ;
#define my_sv_setpvn(sv, d, s) sv_setpvn(sv, (s ? d : (void*)""), s)
#define OutputValue(arg, name) \
{ if (RETVAL == 0) { \
my_sv_setpvn(arg, name.data, name.size) ; \
} \
}
#define OutputKey(arg, name) \
{ if (RETVAL == 0) \
{ \
if (db->type != DB_RECNO) { \
my_sv_setpvn(arg, name.data, name.size); \
} \
else \
sv_setiv(arg, (I32)*(I32*)name.data - 1); \
} \
}
/* Internal Global Data */
static recno_t Value ;
static recno_t zero = 0 ;
static DB_File CurrentDB ;
static DBTKEY empty ;
#ifdef DB_VERSION_MAJOR
static int
db_put(db, key, value, flags)
DB_File db ;
DBTKEY key ;
DBT value ;
u_int flags ;
{
int status ;
if (flagSet(flags, R_CURSOR)) {
status = ((db->cursor)->c_del)(db->cursor, 0);
if (status != 0)
return status ;
#if DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 5
flags &= ~R_CURSOR ;
#else
flags &= ~DB_OPFLAGS_MASK ;
#endif
}
return ((db->dbp)->put)(db->dbp, NULL, &key, &value, flags) ;
}
#endif /* DB_VERSION_MAJOR */
static void
GetVersionInfo()
{
SV * ver_sv = perl_get_sv("DB_File::db_version", TRUE) ;
#ifdef DB_VERSION_MAJOR
int Major, Minor, Patch ;
(void)db_version(&Major, &Minor, &Patch) ;
/* check that libdb is recent enough -- we need 2.3.4 or greater */
if (Major == 2 && (Minor < 3 || (Minor == 3 && Patch < 4)))
croak("DB_File needs Berkeley DB 2.3.4 or greater, you have %d.%d.%d\n",
Major, Minor, Patch) ;
#if PERL_VERSION > 3
sv_setpvf(ver_sv, "%d.%d", Major, Minor) ;
#else
{
char buffer[40] ;
sprintf(buffer, "%d.%d", Major, Minor) ;
sv_setpv(ver_sv, buffer) ;
}
#endif
#else
sv_setiv(ver_sv, 1) ;
#endif
}
static int
btree_compare(key1, key2)
const DBT * key1 ;
const DBT * key2 ;
{
dSP ;
void * data1, * data2 ;
int retval ;
int count ;
data1 = key1->data ;
data2 = key2->data ;
/* As newSVpv will assume that the data pointer is a null terminated C
string if the size parameter is 0, make sure that data points to an
empty string if the length is 0
*/
if (key1->size == 0)
data1 = "" ;
if (key2->size == 0)
data2 = "" ;
ENTER ;
SAVETMPS;
PUSHMARK(SP) ;
EXTEND(SP,2) ;
PUSHs(sv_2mortal(newSVpv(data1,key1->size)));
PUSHs(sv_2mortal(newSVpv(data2,key2->size)));
PUTBACK ;
count = perl_call_sv(CurrentDB->compare, G_SCALAR);
SPAGAIN ;
if (count != 1)
croak ("DB_File btree_compare: expected 1 return value from compare sub, got %d\n", count) ;
retval = POPi ;
PUTBACK ;
FREETMPS ;
LEAVE ;
return (retval) ;
}
static DB_Prefix_t
btree_prefix(key1, key2)
const DBT * key1 ;
const DBT * key2 ;
{
dSP ;
void * data1, * data2 ;
int retval ;
int count ;
data1 = key1->data ;
data2 = key2->data ;
/* As newSVpv will assume that the data pointer is a null terminated C
string if the size parameter is 0, make sure that data points to an
empty string if the length is 0
*/
if (key1->size == 0)
data1 = "" ;
if (key2->size == 0)
data2 = "" ;
ENTER ;
SAVETMPS;
PUSHMARK(SP) ;
EXTEND(SP,2) ;
PUSHs(sv_2mortal(newSVpv(data1,key1->size)));
PUSHs(sv_2mortal(newSVpv(data2,key2->size)));
PUTBACK ;
count = perl_call_sv(CurrentDB->prefix, G_SCALAR);
SPAGAIN ;
if (count != 1)
croak ("DB_File btree_prefix: expected 1 return value from prefix sub, got %d\n", count) ;
retval = POPi ;
PUTBACK ;
FREETMPS ;
LEAVE ;
return (retval) ;
}
static DB_Hash_t
hash_cb(data, size)
const void * data ;
size_t size ;
{
dSP ;
int retval ;
int count ;
if (size == 0)
data = "" ;
/* DGH - Next two lines added to fix corrupted stack problem */
ENTER ;
SAVETMPS;
PUSHMARK(SP) ;
XPUSHs(sv_2mortal(newSVpv((char*)data,size)));
PUTBACK ;
count = perl_call_sv(CurrentDB->hash, G_SCALAR);
SPAGAIN ;
if (count != 1)
croak ("DB_File hash_cb: expected 1 return value from hash sub, got %d\n", count) ;
retval = POPi ;
PUTBACK ;
FREETMPS ;
LEAVE ;
return (retval) ;
}
#ifdef TRACE
static void
PrintHash(hash)
INFO * hash ;
{
printf ("HASH Info\n") ;
printf (" hash = %s\n",
(hash->db_HA_hash != NULL ? "redefined" : "default")) ;
printf (" bsize = %d\n", hash->db_HA_bsize) ;
printf (" ffactor = %d\n", hash->db_HA_ffactor) ;
printf (" nelem = %d\n", hash->db_HA_nelem) ;
printf (" cachesize = %d\n", hash->db_HA_cachesize) ;
printf (" lorder = %d\n", hash->db_HA_lorder) ;
}
static void
PrintRecno(recno)
INFO * recno ;
{
printf ("RECNO Info\n") ;
printf (" flags = %d\n", recno->db_RE_flags) ;
printf (" cachesize = %d\n", recno->db_RE_cachesize) ;
printf (" psize = %d\n", recno->db_RE_psize) ;
printf (" lorder = %d\n", recno->db_RE_lorder) ;
printf (" reclen = %ul\n", (unsigned long)recno->db_RE_reclen) ;
printf (" bval = %d 0x%x\n", recno->db_RE_bval, recno->db_RE_bval) ;
printf (" bfname = %d [%s]\n", recno->db_RE_bfname, recno->db_RE_bfname) ;
}
static void
PrintBtree(btree)
INFO * btree ;
{
printf ("BTREE Info\n") ;
printf (" compare = %s\n",
(btree->db_BT_compare ? "redefined" : "default")) ;
printf (" prefix = %s\n",
(btree->db_BT_prefix ? "redefined" : "default")) ;
printf (" flags = %d\n", btree->db_BT_flags) ;
printf (" cachesize = %d\n", btree->db_BT_cachesize) ;
printf (" psize = %d\n", btree->db_BT_psize) ;
#ifndef DB_VERSION_MAJOR
printf (" maxkeypage = %d\n", btree->db_BT_maxkeypage) ;
printf (" minkeypage = %d\n", btree->db_BT_minkeypage) ;
#endif
printf (" lorder = %d\n", btree->db_BT_lorder) ;
}
#else
#define PrintRecno(recno)
#define PrintHash(hash)
#define PrintBtree(btree)
#endif /* TRACE */
static I32
GetArrayLength(db)
DB_File db ;
{
DBT key ;
DBT value ;
int RETVAL ;
DBT_flags(key) ;
DBT_flags(value) ;
RETVAL = do_SEQ(db, key, value, R_LAST) ;
if (RETVAL == 0)
RETVAL = *(I32 *)key.data ;
else /* No key means empty file */
RETVAL = 0 ;
return ((I32)RETVAL) ;
}
static recno_t
GetRecnoKey(db, value)
DB_File db ;
I32 value ;
{
if (value < 0) {
/* Get the length of the array */
I32 length = GetArrayLength(db) ;
/* check for attempt to write before start of array */
if (length + value + 1 <= 0)
croak("Modification of non-creatable array value attempted, subscript %ld", (long)value) ;
value = length + value + 1 ;
}
else
++ value ;
return value ;
}
static DB_File
ParseOpenInfo(isHASH, name, flags, mode, sv)
int isHASH ;
char * name ;
int flags ;
int mode ;
SV * sv ;
{
SV ** svp;
HV * action ;
DB_File RETVAL = (DB_File)safemalloc(sizeof(DB_File_type)) ;
void * openinfo = NULL ;
INFO * info = &RETVAL->info ;
STRLEN n_a;
/* printf("In ParseOpenInfo name=[%s] flags=[%d] mode = [%d]\n", name, flags, mode) ; */
Zero(RETVAL, 1, DB_File_type) ;
/* Default to HASH */
RETVAL->hash = RETVAL->compare = RETVAL->prefix = NULL ;
RETVAL->type = DB_HASH ;
/* DGH - Next line added to avoid SEGV on existing hash DB */
CurrentDB = RETVAL;
/* fd for 1.86 hash in memory files doesn't return -1 like 1.85 */
RETVAL->in_memory = (name == NULL) ;
if (sv)
{
if (! SvROK(sv) )
croak ("type parameter is not a reference") ;
svp = hv_fetch( (HV*)SvRV(sv), "GOT", 3, FALSE) ;
if (svp && SvOK(*svp))
action = (HV*) SvRV(*svp) ;
else
croak("internal error") ;
if (sv_isa(sv, "DB_File::HASHINFO"))
{
if (!isHASH)
croak("DB_File can only tie an associative array to a DB_HASH database") ;
RETVAL->type = DB_HASH ;
openinfo = (void*)info ;
svp = hv_fetch(action, "hash", 4, FALSE);
if (svp && SvOK(*svp))
{
info->db_HA_hash = hash_cb ;
RETVAL->hash = newSVsv(*svp) ;
}
else
info->db_HA_hash = NULL ;
svp = hv_fetch(action, "ffactor", 7, FALSE);
info->db_HA_ffactor = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "nelem", 5, FALSE);
info->db_HA_nelem = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "bsize", 5, FALSE);
info->db_HA_bsize = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "cachesize", 9, FALSE);
info->db_HA_cachesize = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "lorder", 6, FALSE);
info->db_HA_lorder = svp ? SvIV(*svp) : 0;
PrintHash(info) ;
}
else if (sv_isa(sv, "DB_File::BTREEINFO"))
{
if (!isHASH)
croak("DB_File can only tie an associative array to a DB_BTREE database");
RETVAL->type = DB_BTREE ;
openinfo = (void*)info ;
svp = hv_fetch(action, "compare", 7, FALSE);
if (svp && SvOK(*svp))
{
info->db_BT_compare = btree_compare ;
RETVAL->compare = newSVsv(*svp) ;
}
else
info->db_BT_compare = NULL ;
svp = hv_fetch(action, "prefix", 6, FALSE);
if (svp && SvOK(*svp))
{
info->db_BT_prefix = btree_prefix ;
RETVAL->prefix = newSVsv(*svp) ;
}
else
info->db_BT_prefix = NULL ;
svp = hv_fetch(action, "flags", 5, FALSE);
info->db_BT_flags = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "cachesize", 9, FALSE);
info->db_BT_cachesize = svp ? SvIV(*svp) : 0;
#ifndef DB_VERSION_MAJOR
svp = hv_fetch(action, "minkeypage", 10, FALSE);
info->btree.minkeypage = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "maxkeypage", 10, FALSE);
info->btree.maxkeypage = svp ? SvIV(*svp) : 0;
#endif
svp = hv_fetch(action, "psize", 5, FALSE);
info->db_BT_psize = svp ? SvIV(*svp) : 0;
svp = hv_fetch(action, "lorder", 6, FALSE);
info->db_BT_lorder = svp ? SvIV(*svp) : 0;
PrintBtree(info) ;
}
else if (sv_isa(sv, "DB_File::RECNOINFO"))
{
if (isHASH)
croak("DB_File can only tie an array to a DB_RECNO database");
RETVAL->type = DB_RECNO ;
openinfo = (void *)info ;
info->db_RE_flags = 0 ;
svp = hv_fetch(action, "flags", 5, FALSE);
info->db_RE_flags = (u_long) (svp ? SvIV(*svp) : 0);
svp = hv_fetch(action, "reclen", 6, FALSE);
info->db_RE_reclen = (size_t) (svp ? SvIV(*svp) : 0);
svp = hv_fetch(action, "cachesize", 9, FALSE);
info->db_RE_cachesize = (u_int) (svp ? SvIV(*svp) : 0);
svp = hv_fetch(action, "psize", 5, FALSE);
info->db_RE_psize = (u_int) (svp ? SvIV(*svp) : 0);
svp = hv_fetch(action, "lorder", 6, FALSE);
info->db_RE_lorder = (int) (svp ? SvIV(*svp) : 0);
#ifdef DB_VERSION_MAJOR
info->re_source = name ;
name = NULL ;
#endif
svp = hv_fetch(action, "bfname", 6, FALSE);
if (svp && SvOK(*svp)) {
char * ptr = SvPV(*svp,n_a) ;
#ifdef DB_VERSION_MAJOR
name = (char*) n_a ? ptr : NULL ;
#else
info->db_RE_bfname = (char*) (n_a ? ptr : NULL) ;
#endif
}
else
#ifdef DB_VERSION_MAJOR
name = NULL ;
#else
info->db_RE_bfname = NULL ;
#endif
svp = hv_fetch(action, "bval", 4, FALSE);
#ifdef DB_VERSION_MAJOR
if (svp && SvOK(*svp))
{
int value ;
if (SvPOK(*svp))
value = (int)*SvPV(*svp, n_a) ;
else
value = SvIV(*svp) ;
if (info->flags & DB_FIXEDLEN) {
info->re_pad = value ;
info->flags |= DB_PAD ;
}
else {
info->re_delim = value ;
info->flags |= DB_DELIMITER ;
}
}
#else
if (svp && SvOK(*svp))
{
if (SvPOK(*svp))
info->db_RE_bval = (u_char)*SvPV(*svp, n_a) ;
else
info->db_RE_bval = (u_char)(unsigned long) SvIV(*svp) ;
DB_flags(info->flags, DB_DELIMITER) ;
}
else
{
if (info->db_RE_flags & R_FIXEDLEN)
info->db_RE_bval = (u_char) ' ' ;
else
info->db_RE_bval = (u_char) '\n' ;
DB_flags(info->flags, DB_DELIMITER) ;
}
#endif
#ifdef DB_RENUMBER
info->flags |= DB_RENUMBER ;
#endif
PrintRecno(info) ;
}
else
croak("type is not of type DB_File::HASHINFO, DB_File::BTREEINFO or DB_File::RECNOINFO");
}
/* OS2 Specific Code */
#ifdef OS2
#ifdef __EMX__
flags |= O_BINARY;
#endif /* __EMX__ */
#endif /* OS2 */
#ifdef DB_VERSION_MAJOR
{
int Flags = 0 ;
int status ;
/* Map 1.x flags to 2.x flags */
if ((flags & O_CREAT) == O_CREAT)
Flags |= DB_CREATE ;
#if O_RDONLY == 0
if (flags == O_RDONLY)
#else
if ((flags & O_RDONLY) == O_RDONLY && (flags & O_RDWR) != O_RDWR)
#endif
Flags |= DB_RDONLY ;
#ifdef O_TRUNC
if ((flags & O_TRUNC) == O_TRUNC)
Flags |= DB_TRUNCATE ;
#endif
status = db_open(name, RETVAL->type, Flags, mode, NULL, openinfo, &RETVAL->dbp) ;
if (status == 0)
#if DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 6
status = (RETVAL->dbp->cursor)(RETVAL->dbp, NULL, &RETVAL->cursor) ;
#else
status = (RETVAL->dbp->cursor)(RETVAL->dbp, NULL, &RETVAL->cursor,
0) ;
#endif
if (status)
RETVAL->dbp = NULL ;
}
#else
RETVAL->dbp = dbopen(name, flags, mode, RETVAL->type, openinfo) ;
#endif
return (RETVAL) ;
}
static int
not_here(s)
char *s;
{
croak("DB_File::%s not implemented on this architecture", s);
return -1;
}
static double
constant(name, arg)
char *name;
int arg;
{
errno = 0;
switch (*name) {
case 'A':
break;
case 'B':
if (strEQ(name, "BTREEMAGIC"))
#ifdef BTREEMAGIC
return BTREEMAGIC;
#else
goto not_there;
#endif
if (strEQ(name, "BTREEVERSION"))
#ifdef BTREEVERSION
return BTREEVERSION;
#else
goto not_there;
#endif
break;
case 'C':
break;
case 'D':
if (strEQ(name, "DB_LOCK"))
#ifdef DB_LOCK
return DB_LOCK;
#else
goto not_there;
#endif
if (strEQ(name, "DB_SHMEM"))
#ifdef DB_SHMEM
return DB_SHMEM;
#else
goto not_there;
#endif
if (strEQ(name, "DB_TXN"))
#ifdef DB_TXN
return (U32)DB_TXN;
#else
goto not_there;
#endif
break;
case 'E':
break;
case 'F':
break;
case 'G':
break;
case 'H':
if (strEQ(name, "HASHMAGIC"))
#ifdef HASHMAGIC
return HASHMAGIC;
#else
goto not_there;
#endif
if (strEQ(name, "HASHVERSION"))
#ifdef HASHVERSION
return HASHVERSION;
#else
goto not_there;
#endif
break;
case 'I':
break;
case 'J':
break;
case 'K':
break;
case 'L':
break;
case 'M':
if (strEQ(name, "MAX_PAGE_NUMBER"))
#ifdef MAX_PAGE_NUMBER
return (U32)MAX_PAGE_NUMBER;
#else
goto not_there;
#endif
if (strEQ(name, "MAX_PAGE_OFFSET"))
#ifdef MAX_PAGE_OFFSET
return MAX_PAGE_OFFSET;
#else
goto not_there;
#endif
if (strEQ(name, "MAX_REC_NUMBER"))
#ifdef MAX_REC_NUMBER
return (U32)MAX_REC_NUMBER;
#else
goto not_there;
#endif
break;
case 'N':
break;
case 'O':
break;
case 'P':
break;
case 'Q':
break;
case 'R':
if (strEQ(name, "RET_ERROR"))
#ifdef RET_ERROR
return RET_ERROR;
#else
goto not_there;
#endif
if (strEQ(name, "RET_SPECIAL"))
#ifdef RET_SPECIAL
return RET_SPECIAL;
#else
goto not_there;
#endif
if (strEQ(name, "RET_SUCCESS"))
#ifdef RET_SUCCESS
return RET_SUCCESS;
#else
goto not_there;
#endif
if (strEQ(name, "R_CURSOR"))
#ifdef R_CURSOR
return R_CURSOR;
#else
goto not_there;
#endif
if (strEQ(name, "R_DUP"))
#ifdef R_DUP
return R_DUP;
#else
goto not_there;
#endif
if (strEQ(name, "R_FIRST"))
#ifdef R_FIRST
return R_FIRST;
#else
goto not_there;
#endif
if (strEQ(name, "R_FIXEDLEN"))
#ifdef R_FIXEDLEN
return R_FIXEDLEN;
#else
goto not_there;
#endif
if (strEQ(name, "R_IAFTER"))
#ifdef R_IAFTER
return R_IAFTER;
#else
goto not_there;
#endif
if (strEQ(name, "R_IBEFORE"))
#ifdef R_IBEFORE
return R_IBEFORE;
#else
goto not_there;
#endif
if (strEQ(name, "R_LAST"))
#ifdef R_LAST
return R_LAST;
#else
goto not_there;
#endif
if (strEQ(name, "R_NEXT"))
#ifdef R_NEXT
return R_NEXT;
#else
goto not_there;
#endif
if (strEQ(name, "R_NOKEY"))
#ifdef R_NOKEY
return R_NOKEY;
#else
goto not_there;
#endif
if (strEQ(name, "R_NOOVERWRITE"))
#ifdef R_NOOVERWRITE
return R_NOOVERWRITE;
#else
goto not_there;
#endif
if (strEQ(name, "R_PREV"))
#ifdef R_PREV
return R_PREV;
#else
goto not_there;
#endif
if (strEQ(name, "R_RECNOSYNC"))
#ifdef R_RECNOSYNC
return R_RECNOSYNC;
#else
goto not_there;
#endif
if (strEQ(name, "R_SETCURSOR"))
#ifdef R_SETCURSOR
return R_SETCURSOR;
#else
goto not_there;
#endif
if (strEQ(name, "R_SNAPSHOT"))
#ifdef R_SNAPSHOT
return R_SNAPSHOT;
#else
goto not_there;
#endif
break;
case 'S':
break;
case 'T':
break;
case 'U':
break;
case 'V':
break;
case 'W':
break;
case 'X':
break;
case 'Y':
break;
case 'Z':
break;
case '_':
break;
}
errno = EINVAL;
return 0;
not_there:
errno = ENOENT;
return 0;
}
MODULE = DB_File PACKAGE = DB_File PREFIX = db_
BOOT:
{
GetVersionInfo() ;
empty.data = &zero ;
empty.size = sizeof(recno_t) ;
DBT_flags(empty) ;
}
double
constant(name,arg)
char * name
int arg
DB_File
db_DoTie_(isHASH, dbtype, name=undef, flags=O_CREAT|O_RDWR, mode=0666, type=DB_HASH)
int isHASH
char * dbtype
int flags
int mode
CODE:
{
char * name = (char *) NULL ;
SV * sv = (SV *) NULL ;
STRLEN n_a;
if (items >= 3 && SvOK(ST(2)))
name = (char*) SvPV(ST(2), n_a) ;
if (items == 6)
sv = ST(5) ;
RETVAL = ParseOpenInfo(isHASH, name, flags, mode, sv) ;
if (RETVAL->dbp == NULL)
RETVAL = NULL ;
}
OUTPUT:
RETVAL
int
db_DESTROY(db)
DB_File db
INIT:
CurrentDB = db ;
CLEANUP:
if (db->hash)
SvREFCNT_dec(db->hash) ;
if (db->compare)
SvREFCNT_dec(db->compare) ;
if (db->prefix)
SvREFCNT_dec(db->prefix) ;
Safefree(db) ;
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
#endif
int
db_DELETE(db, key, flags=0)
DB_File db
DBTKEY key
u_int flags
INIT:
CurrentDB = db ;
int
db_EXISTS(db, key)
DB_File db
DBTKEY key
CODE:
{
DBT value ;
DBT_flags(value) ;
CurrentDB = db ;
RETVAL = (((db->dbp)->get)(db->dbp, TXN &key, &value, 0) == 0) ;
}
OUTPUT:
RETVAL
int
db_FETCH(db, key, flags=0)
DB_File db
DBTKEY key
u_int flags
CODE:
{
DBT value ;
DBT_flags(value) ;
CurrentDB = db ;
/* RETVAL = ((db->dbp)->get)(db->dbp, TXN &key, &value, flags) ; */
RETVAL = db_get(db, key, value, flags) ;
ST(0) = sv_newmortal();
OutputValue(ST(0), value)
}
int
db_STORE(db, key, value, flags=0)
DB_File db
DBTKEY key
DBT value
u_int flags
INIT:
CurrentDB = db ;
int
db_FIRSTKEY(db)
DB_File db
CODE:
{
DBTKEY key ;
DBT value ;
DBT_flags(key) ;
DBT_flags(value) ;
CurrentDB = db ;
RETVAL = do_SEQ(db, key, value, R_FIRST) ;
ST(0) = sv_newmortal();
OutputKey(ST(0), key) ;
}
int
db_NEXTKEY(db, key)
DB_File db
DBTKEY key
CODE:
{
DBT value ;
DBT_flags(value) ;
CurrentDB = db ;
RETVAL = do_SEQ(db, key, value, R_NEXT) ;
ST(0) = sv_newmortal();
OutputKey(ST(0), key) ;
}
#
# These would be nice for RECNO
#
int
unshift(db, ...)
DB_File db
ALIAS: UNSHIFT = 1
CODE:
{
DBTKEY key ;
DBT value ;
int i ;
int One ;
DB * Db = db->dbp ;
STRLEN n_a;
DBT_flags(key) ;
DBT_flags(value) ;
CurrentDB = db ;
#ifdef DB_VERSION_MAJOR
/* get the first value */
RETVAL = do_SEQ(db, key, value, DB_FIRST) ;
RETVAL = 0 ;
#else
RETVAL = -1 ;
#endif
for (i = items-1 ; i > 0 ; --i)
{
value.data = SvPV(ST(i), n_a) ;
value.size = n_a ;
One = 1 ;
key.data = &One ;
key.size = sizeof(int) ;
#ifdef DB_VERSION_MAJOR
RETVAL = (db->cursor->c_put)(db->cursor, &key, &value, DB_BEFORE) ;
#else
RETVAL = (Db->put)(Db, &key, &value, R_IBEFORE) ;
#endif
if (RETVAL != 0)
break;
}
}
OUTPUT:
RETVAL
I32
pop(db)
DB_File db
ALIAS: POP = 1
CODE:
{
DBTKEY key ;
DBT value ;
DBT_flags(key) ;
DBT_flags(value) ;
CurrentDB = db ;
/* First get the final value */
RETVAL = do_SEQ(db, key, value, R_LAST) ;
ST(0) = sv_newmortal();
/* Now delete it */
if (RETVAL == 0)
{
/* the call to del will trash value, so take a copy now */
OutputValue(ST(0), value) ;
RETVAL = db_del(db, key, R_CURSOR) ;
if (RETVAL != 0)
sv_setsv(ST(0), &PL_sv_undef);
}
}
I32
shift(db)
DB_File db
ALIAS: SHIFT = 1
CODE:
{
DBT value ;
DBTKEY key ;
DBT_flags(key) ;
DBT_flags(value) ;
CurrentDB = db ;
/* get the first value */
RETVAL = do_SEQ(db, key, value, R_FIRST) ;
ST(0) = sv_newmortal();
/* Now delete it */
if (RETVAL == 0)
{
/* the call to del will trash value, so take a copy now */
OutputValue(ST(0), value) ;
RETVAL = db_del(db, key, R_CURSOR) ;
if (RETVAL != 0)
sv_setsv (ST(0), &PL_sv_undef) ;
}
}
I32
push(db, ...)
DB_File db
ALIAS: PUSH = 1
CODE:
{
DBTKEY key ;
DBT value ;
DB * Db = db->dbp ;
int i ;
STRLEN n_a;
DBT_flags(key) ;
DBT_flags(value) ;
CurrentDB = db ;
#ifdef DB_VERSION_MAJOR
RETVAL = 0 ;
key = empty ;
for (i = 1 ; i < items ; ++i)
{
value.data = SvPV(ST(i), n_a) ;
value.size = n_a ;
RETVAL = (Db->put)(Db, NULL, &key, &value, DB_APPEND) ;
if (RETVAL != 0)
break;
}
#else
/* Set the Cursor to the Last element */
RETVAL = do_SEQ(db, key, value, R_LAST) ;
if (RETVAL >= 0)
{
if (RETVAL == 1)
key = empty ;
for (i = items - 1 ; i > 0 ; --i)
{
value.data = SvPV(ST(i), n_a) ;
value.size = n_a ;
RETVAL = (Db->put)(Db, &key, &value, R_IAFTER) ;
if (RETVAL != 0)
break;
}
}
#endif
}
OUTPUT:
RETVAL
I32
length(db)
DB_File db
ALIAS: FETCHSIZE = 1
CODE:
CurrentDB = db ;
RETVAL = GetArrayLength(db) ;
OUTPUT:
RETVAL
#
# Now provide an interface to the rest of the DB functionality
#
int
db_del(db, key, flags=0)
DB_File db
DBTKEY key
u_int flags
CODE:
CurrentDB = db ;
RETVAL = db_del(db, key, flags) ;
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
else if (RETVAL == DB_NOTFOUND)
RETVAL = 1 ;
#endif
OUTPUT:
RETVAL
int
db_get(db, key, value, flags=0)
DB_File db
DBTKEY key
DBT value = NO_INIT
u_int flags
CODE:
CurrentDB = db ;
DBT_flags(value) ;
RETVAL = db_get(db, key, value, flags) ;
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
else if (RETVAL == DB_NOTFOUND)
RETVAL = 1 ;
#endif
OUTPUT:
RETVAL
value
int
db_put(db, key, value, flags=0)
DB_File db
DBTKEY key
DBT value
u_int flags
CODE:
CurrentDB = db ;
RETVAL = db_put(db, key, value, flags) ;
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
else if (RETVAL == DB_KEYEXIST)
RETVAL = 1 ;
#endif
OUTPUT:
RETVAL
key if (flagSet(flags, R_IAFTER) || flagSet(flags, R_IBEFORE)) OutputKey(ST(1), key);
int
db_fd(db)
DB_File db
int status = 0 ;
CODE:
CurrentDB = db ;
#ifdef DB_VERSION_MAJOR
RETVAL = -1 ;
status = (db->in_memory
? -1
: ((db->dbp)->fd)(db->dbp, &RETVAL) ) ;
if (status != 0)
RETVAL = -1 ;
#else
RETVAL = (db->in_memory
? -1
: ((db->dbp)->fd)(db->dbp) ) ;
#endif
OUTPUT:
RETVAL
int
db_sync(db, flags=0)
DB_File db
u_int flags
CODE:
CurrentDB = db ;
RETVAL = db_sync(db, flags) ;
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
#endif
OUTPUT:
RETVAL
int
db_seq(db, key, value, flags)
DB_File db
DBTKEY key
DBT value = NO_INIT
u_int flags
CODE:
CurrentDB = db ;
DBT_flags(value) ;
RETVAL = db_seq(db, key, value, flags);
#ifdef DB_VERSION_MAJOR
if (RETVAL > 0)
RETVAL = -1 ;
else if (RETVAL == DB_NOTFOUND)
RETVAL = 1 ;
#endif
OUTPUT:
RETVAL
key
value
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