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php-src/ext/pdo_firebird/firebird_statement.c
Matteo Beccati 510498947e Slightly edited tests and fix for bug #62024
2013-05-31 16:19:58 +02:00

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2013 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Ard Biesheuvel <abies@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "pdo/php_pdo.h"
#include "pdo/php_pdo_driver.h"
#include "php_pdo_firebird.h"
#include "php_pdo_firebird_int.h"
#include <time.h>
#define RECORD_ERROR(stmt) _firebird_error(NULL, stmt, __FILE__, __LINE__ TSRMLS_CC)
/* free the allocated space for passing field values to the db and back */
static void free_sqlda(XSQLDA const *sqlda) /* {{{ */
{
int i;
for (i = 0; i < sqlda->sqld; ++i) {
XSQLVAR const *var = &sqlda->sqlvar[i];
if (var->sqlind) {
efree(var->sqlind);
}
}
}
/* }}} */
/* called by PDO to clean up a statement handle */
static int firebird_stmt_dtor(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
int result = 1, i;
/* release the statement */
if (isc_dsql_free_statement(S->H->isc_status, &S->stmt, DSQL_drop)) {
RECORD_ERROR(stmt);
result = 0;
}
/* clean up the fetch buffers if they have been used */
for (i = 0; i < S->out_sqlda.sqld; ++i) {
if (S->fetch_buf[i]) {
efree(S->fetch_buf[i]);
}
}
efree(S->fetch_buf);
zend_hash_destroy(S->named_params);
FREE_HASHTABLE(S->named_params);
/* clean up the input descriptor */
if (S->in_sqlda) {
free_sqlda(S->in_sqlda);
efree(S->in_sqlda);
}
free_sqlda(&S->out_sqlda);
efree(S);
return result;
}
/* }}} */
/* called by PDO to execute a prepared query */
static int firebird_stmt_execute(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
pdo_firebird_db_handle *H = S->H;
unsigned long affected_rows = 0;
static char info_count[] = {isc_info_sql_records};
char result[64];
do {
/* named or open cursors should be closed first */
if ((*S->name || S->cursor_open) && isc_dsql_free_statement(H->isc_status, &S->stmt, DSQL_close)) {
break;
}
S->cursor_open = 0;
/* assume all params have been bound */
if (isc_dsql_execute(H->isc_status, &H->tr, &S->stmt, PDO_FB_SQLDA_VERSION, S->in_sqlda)) {
break;
}
/* Determine how many rows have changed. In this case we are
* only interested in rows changed, not rows retrieved. That
* should be handled by the client when fetching. */
stmt->row_count = affected_rows;
switch (S->statement_type) {
case isc_info_sql_stmt_insert:
case isc_info_sql_stmt_update:
case isc_info_sql_stmt_delete:
case isc_info_sql_stmt_exec_procedure:
if (isc_dsql_sql_info(H->isc_status, &S->stmt, sizeof ( info_count),
info_count, sizeof(result), result)) {
break;
}
if (result[0] == isc_info_sql_records) {
unsigned i = 3, result_size = isc_vax_integer(&result[1], 2);
while (result[i] != isc_info_end && i < result_size) {
short len = (short) isc_vax_integer(&result[i + 1], 2);
if (result[i] != isc_info_req_select_count) {
affected_rows += isc_vax_integer(&result[i + 3], len);
}
i += len + 3;
}
stmt->row_count = affected_rows;
}
default:
;
}
/* commit? */
if (stmt->dbh->auto_commit && isc_commit_retaining(H->isc_status, &H->tr)) {
break;
}
*S->name = 0;
S->cursor_open = (S->out_sqlda.sqln > 0); /* A cursor is opened, when more than zero columns returned */
S->exhausted = !S->cursor_open;
return 1;
} while (0);
RECORD_ERROR(stmt);
return 0;
}
/* }}} */
/* called by PDO to fetch the next row from a statement */
static int firebird_stmt_fetch(pdo_stmt_t *stmt, /* {{{ */
enum pdo_fetch_orientation ori, long offset TSRMLS_DC)
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
pdo_firebird_db_handle *H = S->H;
if (!stmt->executed) {
strcpy(stmt->error_code, "HY000");
H->last_app_error = "Cannot fetch from a closed cursor";
} else if (!S->exhausted) {
if (isc_dsql_fetch(H->isc_status, &S->stmt, PDO_FB_SQLDA_VERSION, &S->out_sqlda)) {
if (H->isc_status[0] && H->isc_status[1]) {
RECORD_ERROR(stmt);
}
S->exhausted = 1;
return 0;
}
if (S->statement_type == isc_info_sql_stmt_exec_procedure) {
S->exhausted = 1;
}
stmt->row_count++;
return 1;
}
return 0;
}
/* }}} */
/* called by PDO to retrieve information about the fields being returned */
static int firebird_stmt_describe(pdo_stmt_t *stmt, int colno TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
struct pdo_column_data *col = &stmt->columns[colno];
XSQLVAR *var = &S->out_sqlda.sqlvar[colno];
int colname_len;
char *cp;
/* allocate storage for the column */
var->sqlind = (void*)ecalloc(1, var->sqllen + 2*sizeof(short));
var->sqldata = &((char*)var->sqlind)[sizeof(short)];
colname_len = (S->H->fetch_table_names && var->relname_length)
? (var->aliasname_length + var->relname_length + 1)
: (var->aliasname_length);
col->precision = -var->sqlscale;
col->maxlen = var->sqllen;
col->namelen = colname_len;
col->name = cp = emalloc(colname_len + 1);
if (colname_len > var->aliasname_length) {
memmove(cp, var->relname, var->relname_length);
cp += var->relname_length;
*cp++ = '.';
}
memmove(cp, var->aliasname, var->aliasname_length);
*(cp+var->aliasname_length) = '\0';
col->param_type = PDO_PARAM_STR;
return 1;
}
/* }}} */
#define FETCH_BUF(buf,type,len,lenvar) ((buf) = (buf) ? (buf) : \
emalloc((len) ? (len * sizeof(type)) : ((*(unsigned long*)lenvar) = sizeof(type))))
#define CHAR_BUF_LEN 24
/* fetch a blob into a fetch buffer */
static int firebird_fetch_blob(pdo_stmt_t *stmt, int colno, char **ptr, /* {{{ */
unsigned long *len, ISC_QUAD *blob_id TSRMLS_DC)
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
pdo_firebird_db_handle *H = S->H;
isc_blob_handle blobh = NULL;
char const bl_item = isc_info_blob_total_length;
char bl_info[20];
unsigned short i;
int result = *len = 0;
if (isc_open_blob(H->isc_status, &H->db, &H->tr, &blobh, blob_id)) {
RECORD_ERROR(stmt);
return 0;
}
if (isc_blob_info(H->isc_status, &blobh, 1, const_cast(&bl_item),
sizeof(bl_info), bl_info)) {
RECORD_ERROR(stmt);
goto fetch_blob_end;
}
/* find total length of blob's data */
for (i = 0; i < sizeof(bl_info); ) {
unsigned short item_len;
char item = bl_info[i++];
if (item == isc_info_end || item == isc_info_truncated || item == isc_info_error
|| i >= sizeof(bl_info)) {
H->last_app_error = "Couldn't determine BLOB size";
goto fetch_blob_end;
}
item_len = (unsigned short) isc_vax_integer(&bl_info[i], 2);
if (item == isc_info_blob_total_length) {
*len = isc_vax_integer(&bl_info[i+2], item_len);
break;
}
i += item_len+2;
}
/* we've found the blob's length, now fetch! */
if (*len) {
unsigned long cur_len;
unsigned short seg_len;
ISC_STATUS stat;
*ptr = S->fetch_buf[colno] = erealloc(*ptr, *len+1);
for (cur_len = stat = 0; (!stat || stat == isc_segment) && cur_len < *len; cur_len += seg_len) {
unsigned short chunk_size = (*len-cur_len) > USHRT_MAX ? USHRT_MAX
: (unsigned short)(*len-cur_len);
stat = isc_get_segment(H->isc_status, &blobh, &seg_len, chunk_size, &(*ptr)[cur_len]);
}
(*ptr)[*len++] = '\0';
if (H->isc_status[0] == 1 && (stat != 0 && stat != isc_segstr_eof && stat != isc_segment)) {
H->last_app_error = "Error reading from BLOB";
goto fetch_blob_end;
}
}
result = 1;
fetch_blob_end:
if (isc_close_blob(H->isc_status, &blobh)) {
RECORD_ERROR(stmt);
return 0;
}
return result;
}
/* }}} */
static int firebird_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr, /* {{{ */
unsigned long *len, int *caller_frees TSRMLS_DC)
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
XSQLVAR const *var = &S->out_sqlda.sqlvar[colno];
if (*var->sqlind == -1) {
/* A NULL value */
*ptr = NULL;
*len = 0;
} else {
if (var->sqlscale < 0) {
static ISC_INT64 const scales[] = { 1, 10, 100, 1000,
10000,
100000,
1000000,
10000000,
100000000,
1000000000,
LL_LIT(10000000000),
LL_LIT(100000000000),
LL_LIT(1000000000000),
LL_LIT(10000000000000),
LL_LIT(100000000000000),
LL_LIT(1000000000000000),
LL_LIT(10000000000000000),
LL_LIT(100000000000000000),
LL_LIT(1000000000000000000)
};
ISC_INT64 n, f = scales[-var->sqlscale];
switch (var->sqltype & ~1) {
case SQL_SHORT:
n = *(short*)var->sqldata;
break;
case SQL_LONG:
n = *(ISC_LONG*)var->sqldata;
break;
case SQL_INT64:
n = *(ISC_INT64*)var->sqldata;
}
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
if (n >= 0) {
*len = slprintf(*ptr, CHAR_BUF_LEN, "%" LL_MASK "d.%0*" LL_MASK "d",
n / f, -var->sqlscale, n % f);
} else if (n <= -f) {
*len = slprintf(*ptr, CHAR_BUF_LEN, "%" LL_MASK "d.%0*" LL_MASK "d",
n / f, -var->sqlscale, -n % f);
} else {
*len = slprintf(*ptr, CHAR_BUF_LEN, "-0.%0*" LL_MASK "d", -var->sqlscale, -n % f);
}
} else {
switch (var->sqltype & ~1) {
struct tm t;
char *fmt;
case SQL_VARYING:
*ptr = &var->sqldata[2];
*len = *(short*)var->sqldata;
break;
case SQL_TEXT:
*ptr = var->sqldata;
*len = var->sqllen;
break;
case SQL_SHORT:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
*len = slprintf(*ptr, CHAR_BUF_LEN, "%d", *(short*)var->sqldata);
break;
case SQL_LONG:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
*len = slprintf(*ptr, CHAR_BUF_LEN, "%ld", *(ISC_LONG*)var->sqldata);
break;
case SQL_INT64:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
*len = slprintf(*ptr, CHAR_BUF_LEN, "%" LL_MASK "d", *(ISC_INT64*)var->sqldata);
break;
case SQL_FLOAT:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
*len = slprintf(*ptr, CHAR_BUF_LEN, "%F", *(float*)var->sqldata);
break;
case SQL_DOUBLE:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, CHAR_BUF_LEN, NULL);
*len = slprintf(*ptr, CHAR_BUF_LEN, "%F" , *(double*)var->sqldata);
break;
case SQL_TYPE_DATE:
isc_decode_sql_date((ISC_DATE*)var->sqldata, &t);
fmt = S->H->date_format ? S->H->date_format : PDO_FB_DEF_DATE_FMT;
if (0) {
case SQL_TYPE_TIME:
isc_decode_sql_time((ISC_TIME*)var->sqldata, &t);
fmt = S->H->time_format ? S->H->time_format : PDO_FB_DEF_TIME_FMT;
} else if (0) {
case SQL_TIMESTAMP:
isc_decode_timestamp((ISC_TIMESTAMP*)var->sqldata, &t);
fmt = S->H->timestamp_format ? S->H->timestamp_format : PDO_FB_DEF_TIMESTAMP_FMT;
}
/* convert the timestamp into a string */
*len = 80;
*ptr = FETCH_BUF(S->fetch_buf[colno], char, *len, NULL);
*len = strftime(*ptr, *len, fmt, &t);
break;
case SQL_BLOB:
return firebird_fetch_blob(stmt,colno,ptr,len,
(ISC_QUAD*)var->sqldata TSRMLS_CC);
}
}
}
return 1;
}
/* }}} */
static int firebird_bind_blob(pdo_stmt_t *stmt, ISC_QUAD *blob_id, zval *param TSRMLS_DC)
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
pdo_firebird_db_handle *H = S->H;
isc_blob_handle h = NULL;
unsigned long put_cnt = 0, rem_cnt;
unsigned short chunk_size;
int result = 1;
if (isc_create_blob(H->isc_status, &H->db, &H->tr, &h, blob_id)) {
RECORD_ERROR(stmt);
return 0;
}
SEPARATE_ZVAL(&param);
convert_to_string_ex(&param);
for (rem_cnt = Z_STRLEN_P(param); rem_cnt > 0; rem_cnt -= chunk_size) {
chunk_size = rem_cnt > USHRT_MAX ? USHRT_MAX : (unsigned short)rem_cnt;
if (isc_put_segment(H->isc_status, &h, chunk_size, &Z_STRVAL_P(param)[put_cnt])) {
RECORD_ERROR(stmt);
result = 0;
break;
}
put_cnt += chunk_size;
}
zval_dtor(param);
if (isc_close_blob(H->isc_status, &h)) {
RECORD_ERROR(stmt);
return 0;
}
return result;
}
static int firebird_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *param, /* {{{ */
enum pdo_param_event event_type TSRMLS_DC)
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
XSQLDA *sqlda = param->is_param ? S->in_sqlda : &S->out_sqlda;
XSQLVAR *var;
if (event_type == PDO_PARAM_EVT_FREE) { /* not used */
return 1;
}
if (!sqlda || param->paramno >= sqlda->sqld) {
strcpy(stmt->error_code, "HY093");
S->H->last_app_error = "Invalid parameter index";
return 0;
}
if (param->is_param && param->paramno == -1) {
long *index;
/* try to determine the index by looking in the named_params hash */
if (SUCCESS == zend_hash_find(S->named_params, param->name, param->namelen+1, (void*)&index)) {
param->paramno = *index;
} else {
/* ... or by looking in the input descriptor */
int i;
for (i = 0; i < sqlda->sqld; ++i) {
XSQLVAR *var = &sqlda->sqlvar[i];
if ((var->aliasname_length && !strncasecmp(param->name, var->aliasname,
min(param->namelen, var->aliasname_length)))
|| (var->sqlname_length && !strncasecmp(param->name, var->sqlname,
min(param->namelen, var->sqlname_length)))) {
param->paramno = i;
break;
}
}
if (i >= sqlda->sqld) {
strcpy(stmt->error_code, "HY093");
S->H->last_app_error = "Invalid parameter name";
return 0;
}
}
}
var = &sqlda->sqlvar[param->paramno];
switch (event_type) {
char *value;
unsigned long value_len;
int caller_frees;
case PDO_PARAM_EVT_ALLOC:
if (param->is_param) {
/* allocate the parameter */
if (var->sqlind) {
efree(var->sqlind);
}
var->sqlind = (void*)emalloc(var->sqllen + 2*sizeof(short));
var->sqldata = &((char*)var->sqlind)[sizeof(short)];
}
break;
case PDO_PARAM_EVT_EXEC_PRE:
if (!param->is_param) {
break;
}
*var->sqlind = 0;
switch (var->sqltype & ~1) {
case SQL_ARRAY:
strcpy(stmt->error_code, "HY000");
S->H->last_app_error = "Cannot bind to array field";
return 0;
case SQL_BLOB:
return firebird_bind_blob(stmt, (ISC_QUAD*)var->sqldata,
param->parameter TSRMLS_CC);
}
/* check if a NULL should be inserted */
switch (Z_TYPE_P(param->parameter)) {
int force_null;
case IS_LONG:
/* keep the allow-NULL flag */
var->sqltype = (sizeof(long) == 8 ? SQL_INT64 : SQL_LONG) | (var->sqltype & 1);
var->sqldata = (void*)&Z_LVAL_P(param->parameter);
var->sqllen = sizeof(long);
break;
case IS_DOUBLE:
/* keep the allow-NULL flag */
var->sqltype = SQL_DOUBLE | (var->sqltype & 1);
var->sqldata = (void*)&Z_DVAL_P(param->parameter);
var->sqllen = sizeof(double);
break;
case IS_STRING:
force_null = 0;
/* for these types, an empty string can be handled like a NULL value */
switch (var->sqltype & ~1) {
case SQL_SHORT:
case SQL_LONG:
case SQL_INT64:
case SQL_FLOAT:
case SQL_DOUBLE:
case SQL_TIMESTAMP:
case SQL_TYPE_DATE:
case SQL_TYPE_TIME:
force_null = (Z_STRLEN_P(param->parameter) == 0);
}
if (!force_null) {
/* keep the allow-NULL flag */
var->sqltype = SQL_TEXT | (var->sqltype & 1);
var->sqldata = Z_STRVAL_P(param->parameter);
var->sqllen = Z_STRLEN_P(param->parameter);
break;
}
case IS_NULL:
/* complain if this field doesn't allow NULL values */
if (~var->sqltype & 1) {
strcpy(stmt->error_code, "HY105");
S->H->last_app_error = "Parameter requires non-null value";
return 0;
}
*var->sqlind = -1;
break;
default:
strcpy(stmt->error_code, "HY105");
S->H->last_app_error = "Binding arrays/objects is not supported";
return 0;
}
break;
case PDO_PARAM_EVT_FETCH_POST:
if (param->paramno == -1) {
return 0;
}
if (param->is_param) {
break;
}
value = NULL;
value_len = 0;
caller_frees = 0;
if (firebird_stmt_get_col(stmt, param->paramno, &value, &value_len, &caller_frees TSRMLS_CC)) {
switch (PDO_PARAM_TYPE(param->param_type)) {
case PDO_PARAM_STR:
if (value) {
ZVAL_STRINGL(param->parameter, value, value_len, 1);
break;
}
case PDO_PARAM_INT:
if (value) {
ZVAL_LONG(param->parameter, *(long*)value);
break;
}
case PDO_PARAM_EVT_NORMALIZE:
if (!param->is_param) {
char *s = param->name;
while (*s != '\0') {
*s = toupper(*s);
s++;
}
}
break;
default:
ZVAL_NULL(param->parameter);
}
if (value && caller_frees) {
efree(value);
}
return 1;
}
return 0;
default:
;
}
return 1;
}
/* }}} */
static int firebird_stmt_set_attribute(pdo_stmt_t *stmt, long attr, zval *val TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
switch (attr) {
default:
return 0;
case PDO_ATTR_CURSOR_NAME:
convert_to_string(val);
if (isc_dsql_set_cursor_name(S->H->isc_status, &S->stmt, Z_STRVAL_P(val),0)) {
RECORD_ERROR(stmt);
return 0;
}
strlcpy(S->name, Z_STRVAL_P(val), sizeof(S->name));
break;
}
return 1;
}
/* }}} */
static int firebird_stmt_get_attribute(pdo_stmt_t *stmt, long attr, zval *val TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
switch (attr) {
default:
return 0;
case PDO_ATTR_CURSOR_NAME:
if (*S->name) {
ZVAL_STRING(val,S->name,1);
} else {
ZVAL_NULL(val);
}
break;
}
return 1;
}
/* }}} */
static int firebird_stmt_cursor_closer(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
pdo_firebird_stmt *S = (pdo_firebird_stmt*)stmt->driver_data;
/* close the statement handle */
if ((*S->name || S->cursor_open) && isc_dsql_free_statement(S->H->isc_status, &S->stmt, DSQL_close)) {
RECORD_ERROR(stmt);
return 0;
}
*S->name = 0;
S->cursor_open = 0;
return 1;
}
/* }}} */
struct pdo_stmt_methods firebird_stmt_methods = { /* {{{ */
firebird_stmt_dtor,
firebird_stmt_execute,
firebird_stmt_fetch,
firebird_stmt_describe,
firebird_stmt_get_col,
firebird_stmt_param_hook,
firebird_stmt_set_attribute,
firebird_stmt_get_attribute,
NULL, /* get_column_meta_func */
NULL, /* next_rowset_func */
firebird_stmt_cursor_closer
};
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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