root/ext/pdo_mysql/mysql_statement.c

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DEFINITIONS

This source file includes following definitions.
  1. pdo_mysql_stmt_dtor
  2. pdo_mysql_stmt_set_row_count
  3. pdo_mysql_fill_stmt_from_result
  4. pdo_mysql_stmt_execute_prepared_libmysql
  5. pdo_mysql_stmt_execute_prepared_mysqlnd
  6. pdo_mysql_stmt_execute
  7. pdo_mysql_stmt_next_rowset
  8. pdo_mysql_stmt_param_hook
  9. pdo_mysql_stmt_fetch
  10. pdo_mysql_stmt_describe
  11. pdo_mysql_stmt_get_col
  12. type_to_name_native
  13. pdo_mysql_stmt_col_meta
  14. pdo_mysql_stmt_cursor_closer

/*
  +----------------------------------------------------------------------+
  | 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: George Schlossnagle <george@omniti.com>                      |
  |         Wez Furlong <wez@php.net>                                    |
  |         Johannes Schlueter <johannes@mysql.com>                      |
  +----------------------------------------------------------------------+
*/

/* $Id$ */

#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_mysql.h"
#include "php_pdo_mysql_int.h"

#ifdef PDO_USE_MYSQLND
#       define pdo_mysql_stmt_execute_prepared(stmt) pdo_mysql_stmt_execute_prepared_mysqlnd(stmt TSRMLS_CC)
#       define pdo_free_bound_result(res) zval_dtor(res.zv)
#       define pdo_mysql_stmt_close(stmt) mysqlnd_stmt_close(stmt, 0)
#else
#       define pdo_mysql_stmt_execute_prepared(stmt) pdo_mysql_stmt_execute_prepared_libmysql(stmt TSRMLS_CC)
#       define pdo_free_bound_result(res) efree(res.buffer)
#       define pdo_mysql_stmt_close(stmt) mysql_stmt_close(stmt)
#endif



static int pdo_mysql_stmt_dtor(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;

        PDO_DBG_ENTER("pdo_mysql_stmt_dtor");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (S->result) {
                /* free the resource */
                mysql_free_result(S->result);
                S->result = NULL;
        }
        if (S->einfo.errmsg) {
                pefree(S->einfo.errmsg, stmt->dbh->is_persistent);
                S->einfo.errmsg = NULL;
        }
        if (S->stmt) {
                pdo_mysql_stmt_close(S->stmt);
                S->stmt = NULL;
        }

#ifndef PDO_USE_MYSQLND
        if (S->params) {
                efree(S->params);
        }
        if (S->in_null) {
                efree(S->in_null);
        }
        if (S->in_length) {
                efree(S->in_length);
        }

        if (S->bound_result)
        {
                int i;
                for (i = 0; i < stmt->column_count; i++) {
                        pdo_free_bound_result(S->bound_result[i]);
                }

                efree(S->bound_result);
                efree(S->out_null);
                efree(S->out_length);
        }
#endif


        if (S->H->server) {
                while (mysql_more_results(S->H->server)) {
                        MYSQL_RES *res;
                        if (mysql_next_result(S->H->server) != 0) {
                                break;
                        }

                        res = mysql_store_result(S->H->server);
                        if (res) {
                                mysql_free_result(res);
                        }
                }
        }

#if PDO_USE_MYSQLND
        if (!S->stmt && S->current_data) {
                mnd_free(S->current_data);
        }
#endif /* PDO_USE_MYSQLND */

        efree(S);
        PDO_DBG_RETURN(1);
}
/* }}} */

static void pdo_mysql_stmt_set_row_count(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        long row_count;
        pdo_mysql_stmt *S = stmt->driver_data;
        row_count = (long) mysql_stmt_affected_rows(S->stmt);
        if (row_count != (long)-1) {
                stmt->row_count = row_count;
        }
}
/* }}} */

static int pdo_mysql_fill_stmt_from_result(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
        pdo_mysql_db_handle *H = S->H;
        my_ulonglong row_count;
        PDO_DBG_ENTER("pdo_mysql_fill_stmt_from_result");

        row_count = mysql_affected_rows(H->server);
        if (row_count == (my_ulonglong)-1) {
                /* we either have a query that returned a result set or an error occurred
                   lets see if we have access to a result set */
                if (!H->buffered) {
                        S->result = mysql_use_result(H->server);
                } else {
                        S->result = mysql_store_result(H->server);
                }
                if (NULL == S->result) {
                        pdo_mysql_error_stmt(stmt);
                        PDO_DBG_RETURN(0);
                }

                stmt->row_count = (long) mysql_num_rows(S->result);
                stmt->column_count = (int) mysql_num_fields(S->result);
                S->fields = mysql_fetch_fields(S->result);
        } else {
                /* this was a DML or DDL query (INSERT, UPDATE, DELETE, ... */
                stmt->row_count = (long) row_count;
        }

        PDO_DBG_RETURN(1);
}
/* }}} */

#ifndef PDO_USE_MYSQLND
static int pdo_mysql_stmt_execute_prepared_libmysql(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = stmt->driver_data;
        pdo_mysql_db_handle *H = S->H;

        PDO_DBG_ENTER("pdo_mysql_stmt_execute_prepared_libmysql");

        /* (re)bind the parameters */
        if (mysql_stmt_bind_param(S->stmt, S->params) || mysql_stmt_execute(S->stmt)) {
                if (S->params) {
                        memset(S->params, 0, S->num_params * sizeof(MYSQL_BIND));
                }
                pdo_mysql_error_stmt(stmt);
                if (mysql_stmt_errno(S->stmt) == 2057) {
                        /* CR_NEW_STMT_METADATA makes the statement unusable */
                        S->stmt = NULL;
                }
                PDO_DBG_RETURN(0);
        }

        if (!S->result) {
                int i;

                /* figure out the result set format, if any */
                S->result = mysql_stmt_result_metadata(S->stmt);
                if (S->result) {
                        int calc_max_length = H->buffered && S->max_length == 1;
                        S->fields = mysql_fetch_fields(S->result);
                        if (S->bound_result) {
                                int i;
                                for (i = 0; i < stmt->column_count; i++) {
                                        efree(S->bound_result[i].buffer);
                                }
                                efree(S->bound_result);
                                efree(S->out_null);
                                efree(S->out_length);
                        }

                        stmt->column_count = (int)mysql_num_fields(S->result);
                        S->bound_result = ecalloc(stmt->column_count, sizeof(MYSQL_BIND));
                        S->out_null = ecalloc(stmt->column_count, sizeof(my_bool));
                        S->out_length = ecalloc(stmt->column_count, sizeof(unsigned long));

                        /* summon memory to hold the row */
                        for (i = 0; i < stmt->column_count; i++) {
                                if (calc_max_length && S->fields[i].type == FIELD_TYPE_BLOB) {
                                        my_bool on = 1;
                                        mysql_stmt_attr_set(S->stmt, STMT_ATTR_UPDATE_MAX_LENGTH, &on);
                                        calc_max_length = 0;
                                }
                                switch (S->fields[i].type) {
                                        case FIELD_TYPE_INT24:
                                                S->bound_result[i].buffer_length = MAX_MEDIUMINT_WIDTH + 1;
                                                break;
                                        case FIELD_TYPE_LONG:
                                                S->bound_result[i].buffer_length = MAX_INT_WIDTH + 1;
                                                break;
                                        case FIELD_TYPE_LONGLONG:
                                                S->bound_result[i].buffer_length = MAX_BIGINT_WIDTH + 1;
                                                break;
                                        case FIELD_TYPE_TINY:
                                                S->bound_result[i].buffer_length = MAX_TINYINT_WIDTH + 1;
                                                break;
                                        case FIELD_TYPE_SHORT:
                                                S->bound_result[i].buffer_length = MAX_SMALLINT_WIDTH + 1;
                                                break;
                                        default:
                                                S->bound_result[i].buffer_length =
                                                        S->fields[i].max_length? S->fields[i].max_length:
                                                        S->fields[i].length;
                                                /* work-around for longtext and alike */
                                                if (S->bound_result[i].buffer_length > H->max_buffer_size) {
                                                        S->bound_result[i].buffer_length = H->max_buffer_size;
                                                }
                                }

                                /* there are cases where the length reported by mysql is too short.
                                 * eg: when describing a table that contains an enum column. Since
                                 * we have no way of knowing the true length either, we'll bump up
                                 * our buffer size to a reasonable size, just in case */
                                if (S->fields[i].max_length == 0 && S->bound_result[i].buffer_length < 128 && MYSQL_TYPE_VAR_STRING) {
                                        S->bound_result[i].buffer_length = 128;
                                }

                                S->out_length[i] = 0;

                                S->bound_result[i].buffer = emalloc(S->bound_result[i].buffer_length);
                                S->bound_result[i].is_null = &S->out_null[i];
                                S->bound_result[i].length = &S->out_length[i];
                                S->bound_result[i].buffer_type = MYSQL_TYPE_STRING;
                        }

                        if (mysql_stmt_bind_result(S->stmt, S->bound_result)) {
                                pdo_mysql_error_stmt(stmt);
                                PDO_DBG_RETURN(0);
                        }

                        /* if buffered, pre-fetch all the data */
                        if (H->buffered) {
                                mysql_stmt_store_result(S->stmt);
                        }
                }
        }

        pdo_mysql_stmt_set_row_count(stmt TSRMLS_CC);
        PDO_DBG_RETURN(1);
}
/* }}} */
#endif

#ifdef PDO_USE_MYSQLND
static int pdo_mysql_stmt_execute_prepared_mysqlnd(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = stmt->driver_data;
        pdo_mysql_db_handle *H = S->H;
        int i;

        PDO_DBG_ENTER("pdo_mysql_stmt_execute_prepared_mysqlnd");

        if (mysql_stmt_execute(S->stmt)) {
                pdo_mysql_error_stmt(stmt);
                PDO_DBG_RETURN(0);
        }

        if (S->result) {
                /* TODO: add a test to check if we really have zvals here... */
                mysql_free_result(S->result);
                S->result = NULL;
        }

        /* for SHOW/DESCRIBE and others the column/field count is not available before execute */
        stmt->column_count = mysql_stmt_field_count(S->stmt);
        for (i = 0; i < stmt->column_count; i++) {
                mysqlnd_stmt_bind_one_result(S->stmt, i);
        }

        S->result = mysqlnd_stmt_result_metadata(S->stmt);
        if (S->result) {
                S->fields = mysql_fetch_fields(S->result);
                /* if buffered, pre-fetch all the data */
                if (H->buffered) {
                        if (mysql_stmt_store_result(S->stmt)) {
                                PDO_DBG_RETURN(0);
                        }
                }
        }

        pdo_mysql_stmt_set_row_count(stmt TSRMLS_CC);
        PDO_DBG_RETURN(1);
}
/* }}} */
#endif

static int pdo_mysql_stmt_execute(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
        pdo_mysql_db_handle *H = S->H;
        PDO_DBG_ENTER("pdo_mysql_stmt_execute");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);

        if (S->stmt) {
                PDO_DBG_RETURN(pdo_mysql_stmt_execute_prepared(stmt));
        }

        /* ensure that we free any previous unfetched results */
        if (S->result) {
                mysql_free_result(S->result);
                S->result = NULL;
        }

        if (mysql_real_query(H->server, stmt->active_query_string, stmt->active_query_stringlen) != 0) {
                pdo_mysql_error_stmt(stmt);
                PDO_DBG_RETURN(0);
        }

        PDO_DBG_RETURN(pdo_mysql_fill_stmt_from_result(stmt TSRMLS_CC));
}
/* }}} */

static int pdo_mysql_stmt_next_rowset(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
        pdo_mysql_db_handle *H = S->H;
        long row_count;
        PDO_DBG_ENTER("pdo_mysql_stmt_next_rowset");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);

#if PDO_USE_MYSQLND
        if (!H->emulate_prepare) {
                if (!mysqlnd_stmt_more_results(S->stmt)) {
                        PDO_DBG_RETURN(0);
                }
                if (mysqlnd_stmt_next_result(S->stmt)) {
                        PDO_DBG_RETURN(0);
                }

                if (!mysqlnd_stmt_more_results(S->stmt)) {
                        /*
                        MySQL gives us n + 1 result sets for
                        CALL proc() and n result sets returned by the proc itself.
                        Result set n + 1 is about the procedure call itself.
                        As the PDO emulation does not return it, we skip it as well
                        */
                        PDO_DBG_RETURN(0);
                }

                /* TODO - this code is stolen from execute() - see above */
                if (S->result) {
                        mysql_free_result(S->result);
                        S->result = NULL;
                }
                {
                        /* for SHOW/DESCRIBE and others the column/field count is not available before execute */
                        int i;

                        stmt->column_count = mysql_stmt_field_count(S->stmt);
                        for (i = 0; i < stmt->column_count; i++) {
                                mysqlnd_stmt_bind_one_result(S->stmt, i);
                        }
                }

                S->result = mysqlnd_stmt_result_metadata(S->stmt);
                if (S->result) {
                        S->fields = mysql_fetch_fields(S->result);

                        /* if buffered, pre-fetch all the data */
                        if (H->buffered) {
                                if (mysql_stmt_store_result(S->stmt)) {
                                        PDO_DBG_RETURN(1);
                                }
                        }
                }
                row_count = (long) mysql_stmt_affected_rows(S->stmt);
                if (row_count != (long)-1) {
                        stmt->row_count = row_count;
                }
                PDO_DBG_RETURN(1);
        }
#endif

/* ensure that we free any previous unfetched results */
#ifndef PDO_USE_MYSQLND
        if (S->stmt) {
                stmt->column_count = (int)mysql_num_fields(S->result);
                mysql_stmt_free_result(S->stmt);
        }
#endif
        if (S->result) {
                mysql_free_result(S->result);
                S->result = NULL;
        }

        if (!mysql_more_results(H->server)) {
                /* No more results */
                PDO_DBG_RETURN(0);      
        }
#if PDO_USE_MYSQLND
        if (mysql_next_result(H->server) == FAIL) {
                pdo_mysql_error_stmt(stmt);
                PDO_DBG_RETURN(0);
        } else {
                PDO_DBG_RETURN(pdo_mysql_fill_stmt_from_result(stmt TSRMLS_CC));
        }
#else
        if (mysql_next_result(H->server) > 0) {
                pdo_mysql_error_stmt(stmt);
                PDO_DBG_RETURN(0);
        } else {
                PDO_DBG_RETURN(pdo_mysql_fill_stmt_from_result(stmt TSRMLS_CC));
        }
#endif
}
/* }}} */


static const char * const pdo_param_event_names[] =
{
        "PDO_PARAM_EVT_ALLOC",
        "PDO_PARAM_EVT_FREE",
        "PDO_PARAM_EVT_EXEC_PRE",
        "PDO_PARAM_EVT_EXEC_POST",
        "PDO_PARAM_EVT_FETCH_PRE",
        "PDO_PARAM_EVT_FETCH_POST",
        "PDO_PARAM_EVT_NORMALIZE",
};


static int pdo_mysql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *param, enum pdo_param_event event_type TSRMLS_DC) /* {{{ */
{
#ifndef PDO_USE_MYSQLND
        PDO_MYSQL_PARAM_BIND *b;
#endif
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;

        PDO_DBG_ENTER("pdo_mysql_stmt_param_hook");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        PDO_DBG_INF_FMT("event = %s", pdo_param_event_names[event_type]);
        if (S->stmt && param->is_param) {
                switch (event_type) {
                        case PDO_PARAM_EVT_ALLOC:
                                /* sanity check parameter number range */
                                if (param->paramno < 0 || param->paramno >= S->num_params) {
                                        strcpy(stmt->error_code, "HY093");
                                        PDO_DBG_RETURN(0);
                                }
                                S->params_given++;

#ifndef PDO_USE_MYSQLND
                                b = &S->params[param->paramno];
                                param->driver_data = b;
                                b->is_null = &S->in_null[param->paramno];
                                b->length = &S->in_length[param->paramno];
                                /* recall how many parameters have been provided */
#endif
                                PDO_DBG_RETURN(1);

                        case PDO_PARAM_EVT_EXEC_PRE:
                                if (S->params_given < (unsigned int) S->num_params) {
                                        /* too few parameter bound */
                                        PDO_DBG_ERR("too few parameters bound");
                                        strcpy(stmt->error_code, "HY093");
                                        PDO_DBG_RETURN(0);
                                }

#if PDO_USE_MYSQLND
                                if (PDO_PARAM_TYPE(param->param_type) == PDO_PARAM_NULL ||
                                                Z_TYPE_P(param->parameter) == IS_NULL) {
                                        mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, param->parameter, MYSQL_TYPE_NULL);
                                        PDO_DBG_RETURN(1);
                                }
#else
                                b = (PDO_MYSQL_PARAM_BIND*)param->driver_data;
                                *b->is_null = 0;
                                if (PDO_PARAM_TYPE(param->param_type) == PDO_PARAM_NULL ||
                                                Z_TYPE_P(param->parameter) == IS_NULL) {
                                        *b->is_null = 1;
                                        b->buffer_type = MYSQL_TYPE_STRING;
                                        b->buffer = NULL;
                                        b->buffer_length = 0;
                                        *b->length = 0;
                                        PDO_DBG_RETURN(1);
                                }
#endif /* PDO_USE_MYSQLND */

                                switch (PDO_PARAM_TYPE(param->param_type)) {
                                        case PDO_PARAM_STMT:
                                                PDO_DBG_RETURN(0);
                                        case PDO_PARAM_LOB:
                                                PDO_DBG_INF("PDO_PARAM_LOB");
                                                if (Z_TYPE_P(param->parameter) == IS_RESOURCE) {
                                                        php_stream *stm;
                                                        php_stream_from_zval_no_verify(stm, &param->parameter);
                                                        if (stm) {
                                                                SEPARATE_ZVAL_IF_NOT_REF(&param->parameter);
                                                                Z_TYPE_P(param->parameter) = IS_STRING;
                                                                Z_STRLEN_P(param->parameter) = php_stream_copy_to_mem(stm,
                                                                        &Z_STRVAL_P(param->parameter), PHP_STREAM_COPY_ALL, 0);
                                                        } else {
                                                                pdo_raise_impl_error(stmt->dbh, stmt, "HY105", "Expected a stream resource" TSRMLS_CC);
                                                                return 0;
                                                        }
                                                }
                                                /* fall through */

                                        default:
                                                ;
                                }

#if PDO_USE_MYSQLND
                                /* Is it really correct to check the zval's type? - But well, that's what the old code below does, too */
                                PDO_DBG_INF_FMT("param->parameter->type=%d", Z_TYPE_P(param->parameter));
                                switch (Z_TYPE_P(param->parameter)) {
                                        case IS_STRING:
                                                mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, param->parameter, MYSQL_TYPE_VAR_STRING);
                                                break;
                                        case IS_LONG:
#if SIZEOF_LONG==8
                                                mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, param->parameter, MYSQL_TYPE_LONGLONG);
#elif SIZEOF_LONG==4
                                                mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, param->parameter, MYSQL_TYPE_LONG);
#endif /* SIZEOF_LONG */
                                                break;
                                        case IS_DOUBLE:
                                                mysqlnd_stmt_bind_one_param(S->stmt, param->paramno, param->parameter, MYSQL_TYPE_DOUBLE);
                                                break;
                                        default:
                                                PDO_DBG_RETURN(0);
                                }

                                PDO_DBG_RETURN(1);
#else
                                PDO_DBG_INF_FMT("param->parameter->type=%d", Z_TYPE_P(param->parameter));
                                switch (Z_TYPE_P(param->parameter)) {
                                        case IS_STRING:
                                                b->buffer_type = MYSQL_TYPE_STRING;
                                                b->buffer = Z_STRVAL_P(param->parameter);
                                                b->buffer_length = Z_STRLEN_P(param->parameter);
                                                *b->length = Z_STRLEN_P(param->parameter);
                                                PDO_DBG_RETURN(1);

                                        case IS_LONG:
                                                b->buffer_type = MYSQL_TYPE_LONG;
                                                b->buffer = &Z_LVAL_P(param->parameter);
                                                PDO_DBG_RETURN(1);

                                        case IS_DOUBLE:
                                                b->buffer_type = MYSQL_TYPE_DOUBLE;
                                                b->buffer = &Z_DVAL_P(param->parameter);
                                                PDO_DBG_RETURN(1);

                                        default:
                                                PDO_DBG_RETURN(0);
                                }
#endif /* PDO_USE_MYSQLND */
                case PDO_PARAM_EVT_FREE:
                case PDO_PARAM_EVT_EXEC_POST:
                case PDO_PARAM_EVT_FETCH_PRE:
                case PDO_PARAM_EVT_FETCH_POST:
                case PDO_PARAM_EVT_NORMALIZE:
                        /* do nothing */
                        break;
                }
        }

        PDO_DBG_RETURN(1);
}
/* }}} */

static int pdo_mysql_stmt_fetch(pdo_stmt_t *stmt, enum pdo_fetch_orientation ori, long offset TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
#if PDO_USE_MYSQLND
        zend_bool fetched_anything;

        PDO_DBG_ENTER("pdo_mysql_stmt_fetch");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (S->stmt) {
                if (FAIL == mysqlnd_stmt_fetch(S->stmt, &fetched_anything) || fetched_anything == FALSE) {
                        PDO_DBG_RETURN(0);
                }

                PDO_DBG_RETURN(1);
        }
#else
        int ret;

        if (S->stmt) {
                ret = mysql_stmt_fetch(S->stmt);

#               ifdef MYSQL_DATA_TRUNCATED
                if (ret == MYSQL_DATA_TRUNCATED) {
                        ret = 0;
                }
#               endif

                if (ret) {
                        if (ret != MYSQL_NO_DATA) {
                                pdo_mysql_error_stmt(stmt);
                        }
                        PDO_DBG_RETURN(0);
                }

                PDO_DBG_RETURN(1);
        }
#endif /* PDO_USE_MYSQLND */

        if (!S->result) {
                strcpy(stmt->error_code, "HY000");
                PDO_DBG_RETURN(0);
        }
#if PDO_USE_MYSQLND
        if (!S->stmt && S->current_data) {
                mnd_free(S->current_data);
        }
#endif /* PDO_USE_MYSQLND */

        if ((S->current_data = mysql_fetch_row(S->result)) == NULL) {
#if PDO_USE_MYSQLND
                if (S->result->unbuf && !S->result->unbuf->eof_reached && mysql_errno(S->H->server)) {
#else
                if (!S->result->eof && mysql_errno(S->H->server)) {
#endif
                        pdo_mysql_error_stmt(stmt);
                }
                PDO_DBG_RETURN(0);
        }

        S->current_lengths = mysql_fetch_lengths(S->result);
        PDO_DBG_RETURN(1);
}
/* }}} */

static int pdo_mysql_stmt_describe(pdo_stmt_t *stmt, int colno TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
        struct pdo_column_data *cols = stmt->columns;
        int i;

        PDO_DBG_ENTER("pdo_mysql_stmt_describe");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (!S->result) {
                PDO_DBG_RETURN(0);
        }

        if (colno >= stmt->column_count) {
                /* error invalid column */
                PDO_DBG_RETURN(0);
        }

        /* fetch all on demand, this seems easiest
        ** if we've been here before bail out
        */
        if (cols[0].name) {
                PDO_DBG_RETURN(1);
        }
        for (i = 0; i < stmt->column_count; i++) {
                int namelen;

                if (S->H->fetch_table_names) {
                        namelen = spprintf(&cols[i].name, 0, "%s.%s", S->fields[i].table, S->fields[i].name);
                        cols[i].namelen = namelen;
                } else {
                        namelen = strlen(S->fields[i].name);
                        cols[i].namelen = namelen;
                        cols[i].name = estrndup(S->fields[i].name, namelen);
                }

                cols[i].precision = S->fields[i].decimals;
                cols[i].maxlen = S->fields[i].length;

#ifdef PDO_USE_MYSQLND
                if (S->stmt) {
                        cols[i].param_type = PDO_PARAM_ZVAL;
                } else
#endif
                {
                        cols[i].param_type = PDO_PARAM_STR;
                }
        }
        PDO_DBG_RETURN(1);
}
/* }}} */

static int pdo_mysql_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr, unsigned long *len, int *caller_frees TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;

        PDO_DBG_ENTER("pdo_mysql_stmt_get_col");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (!S->result) {
                PDO_DBG_RETURN(0);
        }

        /* With mysqlnd data is stored inside mysqlnd, not S->current_data */
        if (!S->stmt) {
                if (S->current_data == NULL || !S->result) {
                        PDO_DBG_RETURN(0);
                }
        }

        if (colno >= stmt->column_count) {
                /* error invalid column */
                PDO_DBG_RETURN(0);
        }
#if PDO_USE_MYSQLND
        if (S->stmt) {
                Z_ADDREF_P(S->stmt->data->result_bind[colno].zv);
                *ptr = (char*)&S->stmt->data->result_bind[colno].zv;
                *len = sizeof(zval);
                PDO_DBG_RETURN(1);
        }
#else
        if (S->stmt) {
                if (S->out_null[colno]) {
                        *ptr = NULL;
                        *len = 0;
                        PDO_DBG_RETURN(1);
                }
                *ptr = S->bound_result[colno].buffer;
                if (S->out_length[colno] > S->bound_result[colno].buffer_length) {
                        /* mysql lied about the column width */
                        strcpy(stmt->error_code, "01004"); /* truncated */
                        S->out_length[colno] = S->bound_result[colno].buffer_length;
                        *len = S->out_length[colno];
                        PDO_DBG_RETURN(0);
                }
                *len = S->out_length[colno];
                PDO_DBG_RETURN(1);
        }
#endif
        *ptr = S->current_data[colno];
        *len = S->current_lengths[colno];
        PDO_DBG_RETURN(1);
} /* }}} */

static char *type_to_name_native(int type) /* {{{ */
{
#define PDO_MYSQL_NATIVE_TYPE_NAME(x)   case FIELD_TYPE_##x: return #x;

    switch (type) {
        PDO_MYSQL_NATIVE_TYPE_NAME(STRING)
        PDO_MYSQL_NATIVE_TYPE_NAME(VAR_STRING)
#ifdef FIELD_TYPE_TINY
        PDO_MYSQL_NATIVE_TYPE_NAME(TINY)
#endif
#ifdef FIELD_TYPE_BIT
        PDO_MYSQL_NATIVE_TYPE_NAME(BIT)
#endif
        PDO_MYSQL_NATIVE_TYPE_NAME(SHORT)
        PDO_MYSQL_NATIVE_TYPE_NAME(LONG)
        PDO_MYSQL_NATIVE_TYPE_NAME(LONGLONG)
        PDO_MYSQL_NATIVE_TYPE_NAME(INT24)
        PDO_MYSQL_NATIVE_TYPE_NAME(FLOAT)
        PDO_MYSQL_NATIVE_TYPE_NAME(DOUBLE)
        PDO_MYSQL_NATIVE_TYPE_NAME(DECIMAL)
#ifdef FIELD_TYPE_NEWDECIMAL
        PDO_MYSQL_NATIVE_TYPE_NAME(NEWDECIMAL)
#endif
#ifdef FIELD_TYPE_GEOMETRY
        PDO_MYSQL_NATIVE_TYPE_NAME(GEOMETRY)
#endif
        PDO_MYSQL_NATIVE_TYPE_NAME(TIMESTAMP)
#ifdef FIELD_TYPE_YEAR
        PDO_MYSQL_NATIVE_TYPE_NAME(YEAR)
#endif
        PDO_MYSQL_NATIVE_TYPE_NAME(SET)
        PDO_MYSQL_NATIVE_TYPE_NAME(ENUM)
        PDO_MYSQL_NATIVE_TYPE_NAME(DATE)
#ifdef FIELD_TYPE_NEWDATE
        PDO_MYSQL_NATIVE_TYPE_NAME(NEWDATE)
#endif
        PDO_MYSQL_NATIVE_TYPE_NAME(TIME)
        PDO_MYSQL_NATIVE_TYPE_NAME(DATETIME)
        PDO_MYSQL_NATIVE_TYPE_NAME(TINY_BLOB)
        PDO_MYSQL_NATIVE_TYPE_NAME(MEDIUM_BLOB)
        PDO_MYSQL_NATIVE_TYPE_NAME(LONG_BLOB)
        PDO_MYSQL_NATIVE_TYPE_NAME(BLOB)
        PDO_MYSQL_NATIVE_TYPE_NAME(NULL)
        default:
            return NULL;
    }
#undef PDO_MYSQL_NATIVE_TYPE_NAME
} /* }}} */

static int pdo_mysql_stmt_col_meta(pdo_stmt_t *stmt, long colno, zval *return_value TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;
        const MYSQL_FIELD *F;
        zval *flags;
        char *str;

        PDO_DBG_ENTER("pdo_mysql_stmt_col_meta");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (!S->result) {
                PDO_DBG_RETURN(FAILURE);
        }
        if (colno >= stmt->column_count) {
                /* error invalid column */
                PDO_DBG_RETURN(FAILURE);
        }

        array_init(return_value);
        MAKE_STD_ZVAL(flags);
        array_init(flags);

        F = S->fields + colno;

        if (F->def) {
                add_assoc_string(return_value, "mysql:def", F->def, 1);
        }
        if (IS_NOT_NULL(F->flags)) {
                add_next_index_string(flags, "not_null", 1);
        }
        if (IS_PRI_KEY(F->flags)) {
                add_next_index_string(flags, "primary_key", 1);
        }
        if (F->flags & MULTIPLE_KEY_FLAG) {
                add_next_index_string(flags, "multiple_key", 1);
        }
        if (F->flags & UNIQUE_KEY_FLAG) {
                add_next_index_string(flags, "unique_key", 1);
        }
        if (IS_BLOB(F->flags)) {
                add_next_index_string(flags, "blob", 1);
        }
        str = type_to_name_native(F->type);
        if (str) {
                add_assoc_string(return_value, "native_type", str, 1);
        }

#ifdef PDO_USE_MYSQLND
        switch (F->type) {
                case MYSQL_TYPE_BIT:
                case MYSQL_TYPE_YEAR:
                case MYSQL_TYPE_TINY:
                case MYSQL_TYPE_SHORT:
                case MYSQL_TYPE_INT24:
                case MYSQL_TYPE_LONG:
#if SIZEOF_LONG==8
                case MYSQL_TYPE_LONGLONG:
#endif
                        add_assoc_long(return_value, "pdo_type", PDO_PARAM_INT);
                        break;
                default:
                        add_assoc_long(return_value, "pdo_type", PDO_PARAM_STR);
                        break;
        }
#endif

        add_assoc_zval(return_value, "flags", flags);
        add_assoc_string(return_value, "table", (char *) (F->table?F->table:""), 1);
        PDO_DBG_RETURN(SUCCESS);
} /* }}} */

static int pdo_mysql_stmt_cursor_closer(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
        pdo_mysql_stmt *S = (pdo_mysql_stmt*)stmt->driver_data;

        PDO_DBG_ENTER("pdo_mysql_stmt_cursor_closer");
        PDO_DBG_INF_FMT("stmt=%p", S->stmt);
        if (S->result) {
                mysql_free_result(S->result);
                S->result = NULL;
        }
        if (S->stmt) {
                int retval;
                retval = mysql_stmt_free_result(S->stmt);
                PDO_DBG_RETURN(retval ? 0 : 1);
        }

        while (mysql_more_results(S->H->server)) {
                MYSQL_RES *res;
                if (mysql_next_result(S->H->server) != 0) {
                        break;
                }
                res = mysql_store_result(S->H->server);
                if (res) {
                        mysql_free_result(res);
                }
        }
        PDO_DBG_RETURN(1);
}
/* }}} */

struct pdo_stmt_methods mysql_stmt_methods = {
        pdo_mysql_stmt_dtor,
        pdo_mysql_stmt_execute,
        pdo_mysql_stmt_fetch,
        pdo_mysql_stmt_describe,
        pdo_mysql_stmt_get_col,
        pdo_mysql_stmt_param_hook,
        NULL, /* set_attr */
        NULL, /* get_attr */
        pdo_mysql_stmt_col_meta,
        pdo_mysql_stmt_next_rowset,
        pdo_mysql_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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