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Firebird.xs
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/*
Copyright (c) 2011 Stefan Suciu <[email protected]>
Copyright (c) 2011 Damyan Ivanov <[email protected]>
Copyright (c) 1999-2008 Edwin Pratomo
Portions Copyright (c) 2001-2005 Daniel Ritz
You may distribute under the terms of either the GNU General Public
License or the Artistic License, as specified in the Perl README file.
*/
/* vim: set noai ts=4 et sw=4: */
#include "Firebird.h"
DBISTATE_DECLARE;
static int _cancel_callback(SV *dbh, IB_EVENT *ev)
{
ISC_STATUS status[ISC_STATUS_LENGTH];
D_imp_dbh(dbh);
int ret = 0;
if (ev->exec_cb)
croak("Can't be called from inside a callback");
if (ev->perl_cb) {
ev->state = INACTIVE;
SvREFCNT_dec(ev->perl_cb);
ev->perl_cb = (SV*)NULL;
isc_cancel_events(status, &(imp_dbh->db), &(ev->id));
if (ib_error_check(dbh, status))
ret = 0;
else
ret = 1;
} else
croak("No callback found for this event handle. Have you called ib_register_callback?");
return ret;
}
static int _call_perlsub(IB_EVENT ISC_FAR *ev, short length,
#if defined(INCLUDE_TYPES_PUB_H)
const ISC_UCHAR *updated
#else
char ISC_FAR *updated
#endif
)
{
int retval = 1;
#if defined(USE_THREADS) || defined(USE_ITHREADS) || defined(MULTIPLICITY)
/* save context, set context from dbh */
void *context = PERL_GET_CONTEXT;
PERL_SET_CONTEXT(ev->dbh->context);
{
#else
void *context = PERL_GET_CONTEXT;
PerlInterpreter *cb_perl = perl_alloc();
PERL_SET_CONTEXT(cb_perl);
{
#endif
dSP;
int i, count;
SV **svp;
HV *posted_events = newHV();
ISC_ULONG ecount[15];
#if defined(INCLUDE_TYPES_PUB_H)
ISC_UCHAR *result = ev->result_buffer;
#else
char ISC_FAR *result = ev->result_buffer;
#endif
while (length--)
*result++ = *updated++;
isc_event_counts(ecount, ev->epb_length, ev->event_buffer,
ev->result_buffer);
for (i = 0; i < ev->num; i++)
{
if (ecount[i])
{
svp = hv_store(posted_events, *(ev->names + i), strlen(*(ev->names + i)),
newSViv(ecount[i]), 0);
if (svp == NULL)
croak("Bad: key '%s' not stored", *(ev->names + i));
}
}
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newRV_noinc((SV*)posted_events)));
PUTBACK;
count = perl_call_sv(ev->perl_cb, G_SCALAR);
SPAGAIN;
if (count > 0)
retval = POPi;
PUTBACK;
FREETMPS;
LEAVE;
#if defined(USE_THREADS) || defined(USE_ITHREADS) || defined(MULTIPLICITY)
}
/* restore old context*/
PERL_SET_CONTEXT(context);
#else
}
PERL_SET_CONTEXT(context);
perl_free(cb_perl);
#endif
return retval;
}
/* callback function for events, called by Firebird */
/* static isc_callback _async_callback(IB_EVENT ISC_FAR *ev, short length, char ISC_FAR *updated) */
static ISC_EVENT_CALLBACK _async_callback(IB_EVENT ISC_FAR *ev,
#if defined(INCLUDE_TYPES_PUB_H)
ISC_USHORT length, const ISC_UCHAR *updated
#else
short length, char ISC_FAR *updated
#endif
)
{
ISC_STATUS status[ISC_STATUS_LENGTH];
switch (ev->state) {
case INACTIVE:
break;
case ACTIVE:
ev->exec_cb = 1;
if (_call_perlsub(ev, length, updated) == 0) {
ev->state = INACTIVE;
ev->exec_cb = 0;
break;
}
ev->exec_cb = 0;
isc_que_events(
status,
&(ev->dbh->db),
&(ev->id),
ev->epb_length,
ev->event_buffer,
(ISC_EVENT_CALLBACK)_async_callback,
ev
);
}
return (0);
}
MODULE = DBD::Firebird PACKAGE = DBD::Firebird
#ifndef FB_API_VER
#define FB_API_VER 0
#endif
BOOT:
HV *stash = gv_stashpv( "DBD::Firebird", TRUE );
newCONSTSUB( stash, "fb_api_ver", newSViv(FB_API_VER) );
newCONSTSUB( stash, "client_major_version", newSViv( isc_get_client_major_version() ) );
newCONSTSUB( stash, "client_minor_version", newSViv( isc_get_client_minor_version() ) );
{
char version_string[1024];
isc_get_client_version(version_string);
int len = strlen(version_string);
if (len > 1023)
die("Version string buffer overflow detected");
SV *ver = newSVpv(version_string, len);
newCONSTSUB( stash, "client_version", ver );
}
INCLUDE: Firebird.xsi
MODULE = DBD::Firebird PACKAGE = DBD::Firebird::db
void
_do(dbh, statement, attr=Nullsv)
SV * dbh
SV * statement
PROTOTYPE: $$;$@
CODE:
{
D_imp_dbh(dbh);
ISC_STATUS status[ISC_STATUS_LENGTH]; /* isc api status vector */
STRLEN slen;
int retval;
char *sbuf = SvPV(statement, slen);
DBI_TRACE_imp_xxh(imp_dbh, 1, (DBIc_LOGPIO(imp_dbh), "db::_do\n" "Executing : %s\n", sbuf));
/* we need an open transaction */
if (!imp_dbh->tr)
{
DBI_TRACE_imp_xxh(imp_dbh, 1, (DBIc_LOGPIO(imp_dbh), "starting new transaction..\n"));
if (!ib_start_transaction(dbh, imp_dbh))
{
retval = -2;
XST_mUNDEF(0); /* <= -2 means error */
return;
}
DBI_TRACE_imp_xxh(imp_dbh, 1, (DBIc_LOGPIO(imp_dbh), "new transaction started.\n"));
}
/* we need to count the DDL statement whether in soft / hard commit */
#if 0
/* only execute_immediate statment if NOT in soft commit mode */
if (!(imp_dbh->soft_commit))
{
isc_dsql_execute_immediate(status, &(imp_dbh->db), &(imp_dbh->tr), 0,
sbuf, imp_dbh->sqldialect, NULL);
if (ib_error_check(dbh, status))
retval = -2;
else
retval = -1 ;
}
else
#endif
/* count DDL statements is necessary for ib_commit_transaction to work properly */
{
isc_stmt_handle stmt = 0L; /* temp statment handle */
static char stmt_info[] = { isc_info_sql_stmt_type };
char info_buffer[20]; /* statment info buffer */
retval = -2;
do
{
char count_item = 0;
/* init statement handle */
if (isc_dsql_alloc_statement2(status, &(imp_dbh->db), &stmt))
break;
/* prepare statement */
isc_dsql_prepare(status, &(imp_dbh->tr), &stmt, 0, sbuf,
imp_dbh->sqldialect, NULL);
if (ib_error_check(dbh, status))
break;
/* get statement type */
if (!isc_dsql_sql_info(status, &stmt, sizeof(stmt_info), stmt_info,
sizeof(info_buffer), info_buffer))
{
/* need to count DDL statments */
short l = (short) isc_vax_integer((char *) info_buffer + 1, 2);
ISC_LONG stmt_type = isc_vax_integer((char *) info_buffer + 3, l);
switch (stmt_type) {
case isc_info_sql_stmt_ddl:
imp_dbh->sth_ddl++;
break;
case isc_info_sql_stmt_insert:
count_item = isc_info_req_insert_count;
break;
case isc_info_sql_stmt_update:
count_item = isc_info_req_update_count;
break;
case isc_info_sql_stmt_delete:
count_item = isc_info_req_delete_count;
break;
}
}
else
break;
/* exec the statement */
isc_dsql_execute(status, &(imp_dbh->tr), &stmt, imp_dbh->sqldialect, NULL);
if (!ib_error_check(dbh, status))
retval = -1;
if (count_item) {
ISC_LONG rows = ib_rows(dbh, &stmt, count_item);
if ( rows >= 0 )
retval = rows;
}
} while (0);
/* close statement */
if (stmt)
isc_dsql_free_statement(status, &stmt, DSQL_drop);
}
/* for AutoCommit: commit */
if (DBIc_has(imp_dbh, DBIcf_AutoCommit))
{
if (!ib_commit_transaction(dbh, imp_dbh))
retval = -2;
}
if (retval < -1)
XST_mUNDEF(0);
else
XST_mIV(0, retval); /* typically 1, rowcount or -1 */
}
void
_ping(dbh)
SV * dbh
CODE:
{
int ret;
ret = dbd_db_ping(dbh);
if (ret == 0)
XST_mUNDEF(0);
else
XST_mIV(0, ret);
}
#define TX_INFOBUF(name, len) \
if (strEQ(item, #name)) { \
*p++ = (char) isc_info_tra_##name; \
res_len += len + 3; \
item_buf_len++; \
continue; \
}
#define TX_RESBUF_CASE(name) \
case isc_info_tra_##name:\
{\
keyname = #name;\
/* PerlIO_printf(PerlIO_stderr(), "Got %s\n", keyname); */\
p++;\
length = isc_vax_integer (p, 2);\
p += 2;\
(void)hv_store(RETVAL, keyname, strlen(keyname), \
newSViv(isc_vax_integer(p, (short) length)), 0);\
p += length;\
break;\
}
HV*
ib_tx_info(dbh)
SV* dbh
PREINIT:
char* p;
char* result = NULL;
short result_length = 0;
ISC_STATUS status[ISC_STATUS_LENGTH];
CODE:
{
D_imp_dbh(dbh);
char request[] = {
isc_info_tra_id,
#if defined(FB_API_VER) && FB_API_VER >= 20
/* FB 2.0: */
isc_info_tra_oldest_interesting,
isc_info_tra_oldest_active,
isc_info_tra_oldest_snapshot,
isc_info_tra_lock_timeout,
isc_info_tra_isolation,
isc_info_tra_access,
#endif
isc_info_end
};
RETVAL = newHV();
if (!RETVAL) {
if (result) {
Safefree(result);
}
do_error(dbh, 2, "unable to allocate hash return value");
XSRETURN_UNDEF;
}
if (!imp_dbh->tr) {
do_error(dbh, 2, "No active transaction");
XSRETURN_UNDEF;
}
/* calc required result buffer size */
for (p = request; *p != isc_info_end; p++) {
result_length++; /* identifier (1 byte)*/
switch (*p) {
#if defined(FB_API_VER) && FB_API_VER >= 20
case isc_info_tra_isolation:
/* result:
length (2 bytes) + first content (1 byte) +
length (2 bytes) + second content (2 bytes max)
*/
result_length += 7;
break;
case isc_info_tra_access:
/* result:
length (2 bytes) + content (1 byte)
*/
result_length += 3;
break;
#endif
default:
result_length += 2; /* length (2 bytes) */
result_length += 4; /* pessimistic */
}
}
result_length += 1; /* add 1 byte for isc_info_end */
/* try insufficient result_length:
result_length = 40;
*/
try_alloc_result_buffer:
Newxz(result, result_length, char);
/* PerlIO_printf(PerlIO_stderr(), "result_length: %d\n", result_length); */
/* call */
isc_transaction_info(status, &(imp_dbh->tr),
sizeof(request), request,
result_length, result);
if (ib_error_check(dbh, status)) {
XSRETURN_UNDEF;
} else {
/* detect truncation */
for (p = result + result_length - 1; p > result; p--) {
if (*p != 0) {
break;
}
}
if (p > result) {
/* PerlIO_printf(PerlIO_stderr(), "First non-null byte found at: %d\n", (p - result)); */
if (*p == isc_info_truncated) {
/* PerlIO_printf(PerlIO_stderr(), "Truncation detected.\n"); */
/* increase result_length, retry allocation */
result_length += 10;
Safefree(result);
result = NULL;
goto try_alloc_result_buffer;
}
}
/* parse result */
for (p = result; p < result + result_length; ) {
char *keyname;
short length;
if (*p == isc_info_end) {
/* PerlIO_printf(PerlIO_stderr(), "isc_info_end encountered at byte: %d\n", (p - result)); */
break;
}
switch (*p) {
TX_RESBUF_CASE(id)
#if defined(FB_API_VER) && FB_API_VER >= 20
TX_RESBUF_CASE(oldest_interesting)
TX_RESBUF_CASE(oldest_active)
TX_RESBUF_CASE(oldest_snapshot)
TX_RESBUF_CASE(lock_timeout)
case isc_info_tra_isolation:
{
HV* reshv;
short length = isc_vax_integer(++p, 2);
/* PerlIO_printf(PerlIO_stderr(), "Content length: %d\n", length); */
keyname = "isolation";
/* PerlIO_printf(PerlIO_stderr(), "Got 'isolation' at byte: %d\n", (p - 1 - result)); */
p += 2;
if (*p == isc_info_tra_consistency) {
(void)hv_store(RETVAL, keyname, strlen(keyname), newSVpv("consistency", 0), 0);
} else if (*p == isc_info_tra_concurrency) {
(void)hv_store(RETVAL, keyname, strlen(keyname), newSVpv("snapshot (concurrency)", 0), 0);
} else if (*p == isc_info_tra_read_committed) {
/* warn("got 'read_committed'"); */
reshv = newHV();
if (!reshv) {
if (result) {
Safefree(result);
}
do_error(dbh, 2, "unable to allocate hash for read_committed rec/no_rec version");
XSRETURN_UNDEF;
}
if (*(p + 1) == isc_info_tra_no_rec_version) {
(void)hv_store(reshv, "read_committed", 14, newSVpv("no_rec_version", 0), 0);
} else if (*(p + 1) == isc_info_tra_rec_version) {
(void)hv_store(reshv, "read_committed", 14, newSVpv("rec_version", 0), 0);
} else {
warn("unrecognized byte");
continue;
}
(void)hv_store(RETVAL, keyname, strlen(keyname),
newRV_noinc((SV*) reshv), 0);
} else {
PerlIO_printf(PerlIO_stderr(), "+2: got unrecognized byte: %d\n", *((char*)p));
}
p += length;
break;
}
case isc_info_tra_access: {
short length = isc_vax_integer(++p, 2);
keyname = "access";
/* PerlIO_printf(PerlIO_stderr(), "Got 'access' at byte: %d\n", (p - 1 - result)); */
p += 2;
if (*p == isc_info_tra_readonly) {
(void)hv_store(RETVAL, keyname, strlen(keyname), newSVpvn("readonly", 8), 0);
} else if (*p == isc_info_tra_readwrite) {
(void)hv_store(RETVAL, keyname, strlen(keyname), newSVpvn("readwrite", 9), 0);
}
p += length;
break;
}
#endif
default:
/* PerlIO_printf(PerlIO_stderr(), "now at byte: %d\n", (p - result)); */
p++;
}
}
}
}
OUTPUT:
RETVAL
CLEANUP:
SvREFCNT_dec(RETVAL);
#undef TX_INFOBUF
#undef TX_RESBUF_CASE
int
ib_set_tx_param(dbh, ...)
SV *dbh
ALIAS:
set_tx_param = 1
PREINIT:
STRLEN len;
char *tx_key, *tx_val, *tpb, *tmp_tpb;
int i, rc = 0;
int tpb_len;
char am_set = 0, il_set = 0, ls_set = 0;
I32 j;
AV *av;
HV *hv;
SV *sv, *sv_value;
HE *he;
CODE:
{
D_imp_dbh(dbh);
#ifdef PERL_UNUSED_VAR
PERL_UNUSED_VAR(ix); /* -Wall */
#endif
/* if no params or first parameter = 0 or undef -> reset TPB to NULL */
if (items < 3)
{
if ((items == 1) || !(SvTRUE(ST(1))))
{
tpb = NULL;
tmp_tpb = NULL;
tpb_len = 0;
goto do_set_tpb;
}
}
/* we need to know the max. size of TBP, (buffer overflow problem) */
/* mem usage: -access_mode: max. 1 byte */
/* -isolation_level: max. 2 bytes */
/* -lock_resolution: max. 1 byte */
/* -reserving: max. 4 bytes + strlen(tablename) */
tpb_len = 5; /* 4 + 1 for tpb_version */
/* we need to add the length of each table name + 4 bytes */
for (i = 1; i < items-1; i += 2)
{
sv_value = ST(i + 1);
if (strEQ(SvPV_nolen(ST(i)), "-reserving"))
if (SvROK(sv_value) && SvTYPE(SvRV(sv_value)) == SVt_PVHV)
{
hv = (HV *)SvRV(sv_value);
hv_iterinit(hv);
while ((he = hv_iternext(hv)))
{
/* retrieve the size of table name(s) */
HePV(he, len);
tpb_len += len + 4;
}
}
}
/* alloc it */
Newx(tmp_tpb, tpb_len, char);
/* do set TPB values */
tpb = tmp_tpb;
*tpb++ = isc_tpb_version3;
for (i = 1; i < items; i += 2)
{
tx_key = SvPV_nolen(ST(i));
sv_value = ST(i + 1);
/* value specified? */
if (i >= items - 1)
{
Safefree(tmp_tpb);
croak("You must specify parameter => value pairs, but there's no value for %s", tx_key);
}
/**********************************************************************/
if (strEQ(tx_key, "-access_mode"))
{
if (am_set)
{
warn("-access_mode already set; ignoring second try!");
continue;
}
tx_val = SvPV_nolen(sv_value);
if (strEQ(tx_val, "read_write"))
*tpb++ = isc_tpb_write;
else if (strEQ(tx_val, "read_only"))
*tpb++ = isc_tpb_read;
else
{
Safefree(tmp_tpb);
croak("Unknown -access_mode value %s", tx_val);
}
am_set = 1; /* flag */
}
/**********************************************************************/
else if (strEQ(tx_key, "-isolation_level"))
{
if (il_set)
{
warn("-isolation_level already set; ignoring second try!");
continue;
}
if (SvROK(sv_value) && SvTYPE(SvRV(sv_value)) == SVt_PVAV)
{
av = (AV *)SvRV(sv_value);
/* sanity check */
for (j = 0; (j <= av_len(av)) && !rc; j++)
{
sv = *av_fetch(av, j, FALSE);
if (strEQ(SvPV_nolen(sv), "read_committed"))
{
rc = 1;
*tpb++ = isc_tpb_read_committed;
}
}
if (!rc)
{
Safefree(tmp_tpb);
croak("Invalid -isolation_level value");
}
for (j = 0; j <= av_len(av); j++)
{
tx_val = SvPV_nolen(*(av_fetch(av, j, FALSE)));
if (strEQ(tx_val, "record_version"))
{
*tpb++ = isc_tpb_rec_version;
break;
}
else if (strEQ(tx_val, "no_record_version"))
{
*tpb++ = isc_tpb_no_rec_version;
break;
}
else if (!strEQ(tx_val, "read_committed"))
{
Safefree(tmp_tpb);
croak("Unknown -isolation_level value %s", tx_val);
}
}
}
else
{
tx_val = SvPV_nolen(sv_value);
if (strEQ(tx_val, "read_committed"))
*tpb++ = isc_tpb_read_committed;
else if (strEQ(tx_val, "snapshot"))
*tpb++ = isc_tpb_concurrency;
else if (strEQ(tx_val, "snapshot_table_stability"))
*tpb++ = isc_tpb_consistency;
else
{
Safefree(tmp_tpb);
croak("Unknown -isolation_level value %s", tx_val);
}
}
il_set = 1; /* flag */
}
/**********************************************************************/
else if (strEQ(tx_key, "-lock_resolution"))
{
if (ls_set)
{
warn("-lock_resolution already set; ignoring second try!");
continue;
}
if (SvROK(sv_value) && SvTYPE(SvRV(sv_value)) == SVt_PVHV) {
#if defined(FB_API_VER) && FB_API_VER >= 20
hv = (HV *)SvRV(sv_value);
if (hv_exists(hv, "wait", 4)) {
*tpb++ = isc_tpb_wait;
sv = *hv_fetch(hv, "wait", 4, FALSE);
if (SvIOK(sv)) {
IV lock_timeout = SvIV(sv);
if (lock_timeout < 0) {
do_error(dbh, 2, "Wait timeout value must be positive integer");
XSRETURN_UNDEF;
} else if (lock_timeout > 0) {
*tpb++ = isc_tpb_lock_timeout;
*tpb++ = sizeof(ISC_LONG); /* length = 4 bytes */
*(ISC_LONG*)tpb = lock_timeout; /* infinite timeout */
tpb += sizeof(ISC_LONG);
}
} else {
do_error(dbh, 2, "Wait timeout value must be positive integer");
XSRETURN_UNDEF;
}
} else {
do_error(dbh, 2, "The only valid key is 'wait'");
XSRETURN_UNDEF;
}
#else
do_error(dbh, 2, "Hashref unsupported. Must be compiled with Firebird 2.0 client library");
XSRETURN_UNDEF;
#endif
} else {
tx_val = SvPV_nolen(sv_value);
if (strEQ(tx_val, "wait"))
*tpb++ = isc_tpb_wait;
else if (strEQ(tx_val, "no_wait"))
*tpb++ = isc_tpb_nowait;
else
{
Safefree(tmp_tpb);
croak("Unknown transaction parameter %s", tx_val);
}
}
ls_set = 1; /* flag */
}
/**********************************************************************/
else if (strEQ(tx_key, "-reserving"))
{
if (SvROK(sv_value) && SvTYPE(SvRV(sv_value)) == SVt_PVHV)
{
char *table_name;
HV *table_opts;
hv = (HV *)SvRV(sv_value);
hv_iterinit(hv);
while ((he = hv_iternext(hv)))
{
/* check val type */
if (SvROK(HeVAL(he)) && SvTYPE(SvRV(HeVAL(he))) == SVt_PVHV)
{
table_opts = (HV*)SvRV(HeVAL(he));
/*
if (hv_exists(table_opts, "access", 6))
{
comment: access is optional
sv = *hv_fetch(table_opts, "access", 6, FALSE);
if (strnEQ(SvPV_nolen(sv), "shared", 6))
*tpb++ = isc_tpb_shared;
else if (strnEQ(SvPV_nolen(sv), "protected", 9))
*tpb++ = isc_tpb_protected;
else
{
Safefree(tmp_tpb);
croak("Invalid -reserving access value");
}
}
*/
if (hv_exists(table_opts, "lock", 4))
{
/* lock is required */
sv = *hv_fetch(table_opts, "lock", 4, FALSE);
if (strnEQ(SvPV_nolen(sv), "read", 4))
*tpb++ = isc_tpb_lock_read;
else if (strnEQ(SvPV_nolen(sv), "write", 5))
*tpb++ = isc_tpb_lock_write;
else
{
Safefree(tmp_tpb);
croak("Invalid -reserving lock value");
}
}
else /* lock */
{
Safefree(tmp_tpb);
croak("Lock value is required in -reserving");
}
/* add the table name to TPB */
table_name = HePV(he, len);
*tpb++ = len + 1;
{
unsigned int k;
for (k = 0; k < len; k++)
*tpb++ = toupper(*table_name++);
}
*tpb++ = 0;
if (hv_exists(table_opts, "access", 6))
{
/* access is optional */
sv = *hv_fetch(table_opts, "access", 6, FALSE);
if (strnEQ(SvPV_nolen(sv), "shared", 6))
*tpb++ = isc_tpb_shared;
else if (strnEQ(SvPV_nolen(sv), "protected", 9))
*tpb++ = isc_tpb_protected;
else
{
Safefree(tmp_tpb);
croak("Invalid -reserving access value");
}
}
} /* end hashref check*/
else
{
Safefree(tmp_tpb);
croak("Reservation for a given table must be hashref.");
}
} /* end of while() */
}
else
{
Safefree(tmp_tpb);
croak("Invalid -reserving value. Must be hashref.");
}
} /* end table reservation */
else
{
Safefree(tmp_tpb);
croak("Unknown transaction parameter %s", tx_key);
}
}
/* an ugly label... */
do_set_tpb:
Safefree(imp_dbh->tpb_buffer);
imp_dbh->tpb_buffer = tmp_tpb;
imp_dbh->tpb_length = tpb - imp_dbh->tpb_buffer;
/* for AutoCommit: commit current transaction */
if (DBIc_has(imp_dbh, DBIcf_AutoCommit))
{
imp_dbh->sth_ddl++;
ib_commit_transaction(dbh, imp_dbh);
}
RETVAL = 1;
}
OUTPUT:
RETVAL
#*******************************************************************************
# only for use within database_info!
#define DB_INFOBUF(name, len) \
if (strEQ(item, #name)) { \
*p++ = (char) isc_info_##name; \
res_len += len + 3; \
item_buf_len++; \
continue; \
}
#define DB_RESBUF_CASEHDR(name) \
case isc_info_##name:\
keyname = #name;
HV *
ib_database_info(dbh, ...)
SV *dbh
PREINIT:
unsigned int i, count;
char item_buf[30], *p, *old_p;
char *res_buf;
short item_buf_len, res_len;
AV *av;
ISC_STATUS status[ISC_STATUS_LENGTH];
CODE:
{
D_imp_dbh(dbh);
/* process input params, count max. result buffer length */
p = item_buf;
res_len = 0;
item_buf_len = 0;
/* array or array ref? */
if (items == 2 && SvROK(ST(1)) && SvTYPE(SvRV(ST(1))) == SVt_PVAV)
{
av = (AV *)SvRV(ST(1));
count = av_len(av) + 1;
}
else
{
av = NULL;
count = items;
}
/* loop thru all elements */
for (i = 0; i < count; i++)
{
char *item;
/* fetch from array or array ref? */
if (av)
item = SvPV_nolen(*av_fetch(av, i, FALSE));
else
item = SvPV_nolen(ST(i + 1));
/* database characteristics */
DB_INFOBUF(allocation, 4);
DB_INFOBUF(base_level, 2);
DB_INFOBUF(db_id, 513);
DB_INFOBUF(implementation, 3);
DB_INFOBUF(no_reserve, 1);
DB_INFOBUF(db_read_only, 1);
DB_INFOBUF(ods_minor_version, 1);
DB_INFOBUF(ods_version, 1);
DB_INFOBUF(page_size, 4);
DB_INFOBUF(version, 257);
DB_INFOBUF(db_sql_dialect, 1);
/* environmental characteristics */
DB_INFOBUF(current_memory, 4);
DB_INFOBUF(forced_writes, 1);
DB_INFOBUF(max_memory, 4);
DB_INFOBUF(num_buffers, 4);
DB_INFOBUF(sweep_interval, 4);
DB_INFOBUF(user_names, 1024); /* can be more, can be less */
/* performance statistics */
DB_INFOBUF(fetches, 4);
DB_INFOBUF(marks, 4);
DB_INFOBUF(reads, 4);
DB_INFOBUF(writes, 4);
#if defined(FB_API_VER) && FB_API_VER >= 20
/* FB 2.0 */
DB_INFOBUF(active_tran_count, 4);
DB_INFOBUF(creation_date, sizeof(ISC_TIMESTAMP)); /* 2 x 4 bytes */
#endif
/* database operation counts */
/* XXX - not implemented (complicated: returns a descriptor for _each_
table...how to fetch / store this??) but do we really need these? */
}
/* the end marker */
*p++ = isc_info_end;
item_buf_len++;
/* allocate the result buffer */
res_len += 256; /* add some safety...just in case */
Newx(res_buf, res_len, char);
/* call the function */
isc_database_info(status, &(imp_dbh->db), item_buf_len, item_buf,
res_len, res_buf);
if (ib_error_check(dbh, status))
{
Safefree(res_buf);
XSRETURN_UNDEF; // croak("isc_database_info failed!");
}
/* fill hash with key/value pairs */
RETVAL = newHV();
for (p = res_buf; *p != isc_info_end; )
{
char *keyname;
char item = *p++;
int length = isc_vax_integer (p, 2);
p += 2;
old_p = p;
switch (item)
{
/******************************************************************/
/* database characteristics */
DB_RESBUF_CASEHDR(allocation)
(void)hv_store(RETVAL, keyname, strlen(keyname),
newSViv(isc_vax_integer(p, (short) length)), 0);
break;
DB_RESBUF_CASEHDR(base_level)
(void)hv_store(RETVAL, keyname, strlen(keyname),
newSViv(isc_vax_integer(++p, 1)), 0);
break;
DB_RESBUF_CASEHDR(db_id)
{
HV *reshv = newHV();
ISC_LONG slen;
(void)hv_store(reshv, "connection", 10,
(isc_vax_integer(p++, 1) == 2)?
newSVpv("local", 0):