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php-src/ext/pdo_firebird/firebird_statement.c
foobar 5bd93221a8 bump year and license version
2006-01-01 12:51:34 +00:00

703 lines
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2006 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;
do {
/* named cursors should be closed first */
if (*S->name && isc_dsql_free_statement(H->isc_status, &S->stmt, DSQL_close)) {
break;
}
/* assume all params have been bound */
if ((S->statement_type == isc_info_sql_stmt_exec_procedure &&
isc_dsql_execute2(H->isc_status, &H->tr, &S->stmt, PDO_FB_SQLDA_VERSION,
S->in_sqlda, &S->out_sqlda))
|| isc_dsql_execute(H->isc_status, &H->tr, &S->stmt, PDO_FB_SQLDA_VERSION,
S->in_sqlda)) {
break;
}
/* commit? */
if (stmt->dbh->auto_commit && isc_commit_retaining(H->isc_status, &H->tr)) {
break;
}
*S->name = 0;
S->exhausted = 0;
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) {
/* an EXECUTE PROCEDURE statement can be fetched from once, without calling the API, because
* the result was returned in the execute call */
if (S->statement_type == isc_info_sql_stmt_exec_procedure) {
S->exhausted = 1;
} else {
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;
}
}
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];
/* allocate storage for the column */
var->sqlind = (void*)emalloc(var->sqllen + 2*sizeof(short));
var->sqldata = &((char*)var->sqlind)[sizeof(short)];
col->precision = -var->sqlscale;
col->maxlen = var->sqllen;
col->namelen = var->aliasname_length;
col->name = estrndup(var->aliasname,var->aliasname_length);
return 1;
}
/* }}} */
#if abies_0
/* internal function to override return types of parameters */
static void set_param_type(enum pdo_param_type *param_type, XSQLVAR const *var) /* {{{ */
{
/* set the param type after the field type */
switch (var->sqltype & ~1) {
case SQL_INT64:
#if SIZEOF_LONG < 8
if (0) /* always a string if its size exceeds native long */
#endif
case SQL_SHORT:
case SQL_LONG:
if (var->sqlscale == 0) {
*param_type = PDO_PARAM_INT;
break;
}
case SQL_TEXT:
case SQL_VARYING:
case SQL_TYPE_DATE:
case SQL_TYPE_TIME:
case SQL_TIMESTAMP:
case SQL_BLOB:
*param_type = PDO_PARAM_STR;
break;
case SQL_FLOAT:
case SQL_DOUBLE:
*param_type = PDO_PARAM_DBL;
break;
}
}
/* }}} */
#endif
#define FETCH_BUF(buf,type,len,lenvar) ((buf) = (buf) ? (buf) : \
emalloc((len) ? (len * sizeof(type)) : ((*(unsigned long*)lenvar) = sizeof(type))))
/* 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 {
/* override the column param type */
/* set_param_type(&stmt->columns[colno].param_type,var); */
stmt->columns[colno].param_type = PDO_PARAM_STR;
if (var->sqlscale < 0) {
static ISC_INT64 const scales[] = { 1, 10, 100, 1000, 10000, 100000, 1000000,
100000000, 1000000000, 1000000000, LL_LIT(10000000000),LL_LIT(100000000000),
LL_LIT(10000000000000), LL_LIT(100000000000000),LL_LIT(1000000000000000),
LL_LIT(1000000000000000),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, 24, NULL);
if (n >= 0) {
*len = sprintf(*ptr, "%" LL_MASK "d.%0*" LL_MASK "d",
n / f, -var->sqlscale, n % f);
} else if (n < -f) {
*len = sprintf(*ptr, "%" LL_MASK "d.%0*" LL_MASK "d",
n / f, -var->sqlscale, -n % f);
} else {
*len = sprintf(*ptr, "-0.%0*" LL_MASK "d", -var->sqlscale, -n % f);
}
} else {
switch (var->sqltype & ~1) {
struct tm t;
char *fmt;
/**
* For the time being, this code has been changed to convert every returned value to a string
* before passing it back up to the PDO driver.
*/
case SQL_VARYING:
*ptr = &var->sqldata[2];
*len = *(short*)var->sqldata;
break;
case SQL_TEXT:
*ptr = var->sqldata;
*len = var->sqllen;
break;
/* --- cut here --- */
case SQL_SHORT:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 24, NULL);
*len = sprintf(*ptr, "%d", *(short*)var->sqldata);
break;
case SQL_LONG:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 24, NULL);
*len = sprintf(*ptr, "%ld", *(ISC_LONG*)var->sqldata);
break;
case SQL_INT64:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 24, NULL);
*len = sprintf(*ptr, "%" LL_MASK "d", *(ISC_INT64*)var->sqldata);
break;
case SQL_FLOAT:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 24, NULL);
*len = sprintf(*ptr, "%f", *(float*)var->sqldata);
break;
case SQL_DOUBLE:
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 24, NULL);
*len = sprintf(*ptr, "%f" , *(double*)var->sqldata);
break;
/* --- cut here --- */
#if abies_0
case SQL_SHORT:
*ptr = FETCH_BUF(S->fetch_buf[colno], long, 0, *len);
*(long*)*ptr = *(short*)var->sqldata;
break;
case SQL_LONG:
#if SIZEOF_LONG == 8
*ptr = FETCH_BUF(S->fetch_buf[colno], long, 0, *len);
*(long*)*ptr = *(ISC_LONG*)var->sqldata;
#else
*ptr = var->sqldata;
#endif
break;
case SQL_INT64:
*len = sizeof(long);
#if SIZEOF_LONG == 8
*ptr = var->sqldata;
#else
*ptr = FETCH_BUF(S->fetch_buf[colno], char, 20, NULL);
*len = sprintf(*ptr, "%" LL_MASK "d", *(ISC_INT64*)var->sqldata);
#endif
break;
case SQL_FLOAT:
*ptr = FETCH_BUF(S->fetch_buf[colno], double, 0, *len);
*(double*)*ptr = *(float*)var->sqldata;
break;
case SQL_DOUBLE:
*ptr = var->sqldata;
*len = sizeof(double);
break;
#endif
case SQL_TYPE_DATE:
isc_decode_sql_date((ISC_DATE*)var->sqldata, &t);
fmt = INI_STR("ibase.dateformat");
if (0) {
case SQL_TYPE_TIME:
isc_decode_sql_time((ISC_TIME*)var->sqldata, &t);
fmt = INI_STR("ibase.timeformat");
} else if (0) {
case SQL_TIMESTAMP:
isc_decode_timestamp((ISC_TIMESTAMP*)var->sqldata, &t);
fmt = INI_STR("ibase.timestampformat");
}
/* convert the timestamp into a string */
*ptr = FETCH_BUF(S->fetch_buf[colno], char, *len = 80, 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 */
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:
var->sqltype = sizeof(long) == 8 ? SQL_INT64 : SQL_LONG;
var->sqldata = (void*)&Z_LVAL_P(param->parameter);
var->sqllen = sizeof(long);
break;
case IS_DOUBLE:
var->sqltype = SQL_DOUBLE;
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) {
var->sqltype = SQL_TEXT;
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:
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;
}
#if abies_0
case PDO_PARAM_DBL:
if (value) {
ZVAL_DOUBLE(param->parameter, *(double*)value);
break;
}
#endif
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;
}
strncpy(S->name, Z_STRVAL_P(val), sizeof(S->name));
S->name[sizeof(S->name)] = 0;
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;
}
/* }}} */
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
};
/* }}} */
/*
* 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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