/* DB_File.xs -- Perl 5 interface to Berkeley DB written by Paul Marquess last modified 6th June 1999 version 1.67 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 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 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 1.66 - Added DBM filter code 1.67 - Backed off the use of newSVpvn. Fixed DBM Filter code for Perl 5.004. Fixed a small memory leak in the filter code. */ #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 /* DEFSV appears first in 5.004_56 */ #ifndef DEFSV #define DEFSV GvSV(defgv) #endif /* Being the Berkeley DB we prefer the (which will be * shortly #included by the ) __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 #include /* #define TRACE */ #define DBM_FILTERING #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 #ifdef DBM_FILTERING SV * filter_fetch_key ; SV * filter_store_key ; SV * filter_fetch_value ; SV * filter_store_value ; int filtering ; #endif /* DBM_FILTERING */ } DB_File_type; typedef DB_File_type * DB_File ; typedef DBT DBTKEY ; #ifdef DBM_FILTERING #define ckFilter(arg,type,name) \ if (db->type) { \ SV * save_defsv ; \ /* printf("filtering %s\n", name) ;*/ \ if (db->filtering) \ croak("recursion detected in %s", name) ; \ db->filtering = TRUE ; \ save_defsv = newSVsv(DEFSV) ; \ sv_setsv(DEFSV, arg) ; \ PUSHMARK(sp) ; \ (void) perl_call_sv(db->type, G_DISCARD|G_NOARGS); \ sv_setsv(arg, DEFSV) ; \ sv_setsv(DEFSV, save_defsv) ; \ SvREFCNT_dec(save_defsv) ; \ db->filtering = FALSE ; \ /*printf("end of filtering %s\n", name) ;*/ \ } #else #define ckFilter(arg,type, name) #endif /* DBM_FILTERING */ #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) ; \ ckFilter(arg, filter_fetch_value,"filter_fetch_value") ; \ } \ } #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); \ ckFilter(arg, filter_fetch_key,"filter_fetch_key") ; \ } \ } /* 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_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(pTHX) { 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(const DBT *key1, const DBT *key2) { dTHX; 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(const DBT *key1, const DBT *key2) { dTHX; 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(const void *data, size_t size) { dTHX; 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(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(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(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(pTHX_ 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(pTHX_ DB_File db, I32 value) { if (value < 0) { /* Get the length of the array */ I32 length = GetArrayLength(aTHX_ 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(pTHX_ 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 */ #ifdef DBM_FILTERING RETVAL->filtering = 0 ; RETVAL->filter_fetch_key = RETVAL->filter_store_key = RETVAL->filter_fetch_value = RETVAL->filter_store_value = #endif /* DBM_FILTERING */ 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 double constant(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(aTHX) ; 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(aTHX_ 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) ; #ifdef DBM_FILTERING if (db->filter_fetch_key) SvREFCNT_dec(db->filter_fetch_key) ; if (db->filter_store_key) SvREFCNT_dec(db->filter_store_key) ; if (db->filter_fetch_value) SvREFCNT_dec(db->filter_fetch_value) ; if (db->filter_store_value) SvREFCNT_dec(db->filter_store_value) ; #endif /* DBM_FILTERING */ 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(aTHX_ 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 #ifdef DBM_FILTERING #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 = NULL ; \ } \ else if (code) { \ if (db->type) \ sv_setsv(db->type, code) ; \ else \ db->type = newSVsv(code) ; \ } \ } SV * filter_fetch_key(db, code) DB_File db SV * code SV * RETVAL = &PL_sv_undef ; CODE: setFilter(filter_fetch_key) ; SV * filter_store_key(db, code) DB_File db SV * code SV * RETVAL = &PL_sv_undef ; CODE: setFilter(filter_store_key) ; SV * filter_fetch_value(db, code) DB_File db SV * code SV * RETVAL = &PL_sv_undef ; CODE: setFilter(filter_fetch_value) ; SV * filter_store_value(db, code) DB_File db SV * code SV * RETVAL = &PL_sv_undef ; CODE: setFilter(filter_store_value) ; #endif /* DBM_FILTERING */