dbx_odbc.c

php-4.4.7学习linux时下载的源代码

/*
   +----------------------------------------------------------------------+
   | PHP Version 4                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2007 The PHP Group                                |
   +----------------------------------------------------------------------+
   | dbx module version 1.0                                               |
   +----------------------------------------------------------------------+
   | Copyright (c) 2001 Guidance Rotterdam BV                             |
   +----------------------------------------------------------------------+
   | 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          |
   | [e-mail] so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author : Marc Boeren         <[e-mail]>                      |
   +----------------------------------------------------------------------+
*/

/* $Id: dbx_odbc.c,v 1.19.2.1.8.2 2007/01/01 09:46:41 sebastian Exp $ */

#include "dbx.h"
#include "dbx_odbc.h"

#define ODBC_ASSOC    1
#define ODBC_NUM      2

int dbx_odbc_connect(zval **rv, zval **host, zval **db, zval **username, zval **password, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns connection handle as resource on success or 0 as long on failure */
	int number_of_arguments=3;
	zval **arguments[3];
	zval *returned_zval=NULL;

	arguments[0]=db;
	arguments[1]=username;
	arguments[2]=password;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_connect", &returned_zval, number_of_arguments, arguments);
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_RESOURCE) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		return 0;
	}
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_pconnect(zval **rv, zval **host, zval **db, zval **username, zval **password, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns connection handle as resource on success or 0 as long on failure */
	int number_of_arguments=3;
	zval **arguments[3];
	zval *returned_zval=NULL;

	arguments[0]=db;
	arguments[1]=username;
	arguments[2]=password;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_pconnect", &returned_zval, number_of_arguments, arguments);
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_RESOURCE) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		return 0;
	}
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_close(zval **rv, zval **dbx_handle, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns 1 as long on success or 0 as long on failure */
	int number_of_arguments=1;
	zval **arguments[1];
	zval *returned_zval=NULL;

	int actual_resource_type;
	void *resource;
	resource = zend_list_find(Z_LVAL_PP(dbx_handle), &actual_resource_type);
	if (!resource) {
		return 0;
	}

	arguments[0]=dbx_handle;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_close", &returned_zval, number_of_arguments, arguments);

	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_NULL) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		return 0;
	}
	convert_to_long_ex(&returned_zval);
	Z_LVAL_P(returned_zval)=1;
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_query(zval **rv, zval **dbx_handle, zval **db_name, zval **sql_statement, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns 1 as long or a result identifier as resource on success  or 0 as long on failure */
	int number_of_arguments=2;
	zval **arguments[2];
	zval *queryresult_zval=NULL;
	zval *num_fields_zval=NULL;

	/* db_name is not used in this function */
	arguments[0]=dbx_handle;
	arguments[1]=sql_statement;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_exec", &queryresult_zval, number_of_arguments, arguments);
	/* odbc_query returns a bool for failure, or a result_identifier for success */
	if (!queryresult_zval || Z_TYPE_P(queryresult_zval)!=IS_RESOURCE) {
		if (queryresult_zval) zval_ptr_dtor(&queryresult_zval);
		return 0;
	}
	MAKE_STD_ZVAL(num_fields_zval);
	ZVAL_LONG(num_fields_zval, 0);
	if (!dbx_odbc_getcolumncount(&num_fields_zval, &queryresult_zval, INTERNAL_FUNCTION_PARAM_PASSTHRU)) {
		FREE_ZVAL(num_fields_zval);
		if (queryresult_zval) zval_ptr_dtor(&queryresult_zval);
		return 0;
	}
	if (Z_LVAL_P(num_fields_zval)==0) {
		Z_TYPE_PP(rv)=IS_BOOL;
		Z_LVAL_PP(rv)=1; /* success, but no data */
		FREE_ZVAL(num_fields_zval);
		if (queryresult_zval) zval_ptr_dtor(&queryresult_zval);
		return 1;
	}
	FREE_ZVAL(num_fields_zval);
	MOVE_RETURNED_TO_RV(rv, queryresult_zval);
	return 1;
}

int dbx_odbc_getcolumncount(zval **rv, zval **result_handle, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns column-count as long on success or 0 as long on failure */
	int number_of_arguments=1;
	zval **arguments[1];
	zval *returned_zval=NULL;

	arguments[0]=result_handle;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_num_fields", &returned_zval, number_of_arguments, arguments);
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_LONG || Z_LVAL_P(returned_zval)<0) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		return 0;
	}
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_getcolumnname(zval **rv, zval **result_handle, long column_index, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns column-name as string on success or 0 as long on failure */
	int number_of_arguments=2;
	zval **arguments[2];
	zval *zval_column_index;
	zval *returned_zval=NULL;

	MAKE_STD_ZVAL(zval_column_index);
	ZVAL_LONG(zval_column_index, column_index+1);
	arguments[0]=result_handle;
	arguments[1]=&zval_column_index;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_field_name", &returned_zval, number_of_arguments, arguments);
	/* odbc_field_name returns a string */
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_STRING) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		FREE_ZVAL(zval_column_index);
		return 0;
	}
	FREE_ZVAL(zval_column_index);
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_getcolumntype(zval **rv, zval **result_handle, long column_index, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns column-type as string on success or 0 as long on failure */
	int number_of_arguments=2;
	zval **arguments[2];
	zval *zval_column_index;
	zval *returned_zval=NULL;

	MAKE_STD_ZVAL(zval_column_index);
	ZVAL_LONG(zval_column_index, column_index+1);
	arguments[0]=result_handle;
	arguments[1]=&zval_column_index;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_field_type", &returned_zval, number_of_arguments, arguments);
	/* odbc_field_name returns a string */
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_STRING) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		FREE_ZVAL(zval_column_index);
		return 0;
	}
	FREE_ZVAL(zval_column_index);

	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_getrow(zval **rv, zval **result_handle, long row_number, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns array[0..columncount-1] as strings on success or 0 as long on failure */
	int number_of_arguments;
	zval **arguments[2];
	zval *num_fields_zval=NULL;
	zval *fetch_row_result_zval=NULL;
	zval *field_result_zval=NULL;
	zval *field_index_zval;
	zval *returned_zval=NULL;
	long field_index;
	long field_count=-1;

	/* get # fields */
	MAKE_STD_ZVAL(num_fields_zval);
	ZVAL_LONG(num_fields_zval, 0);
	if (!dbx_odbc_getcolumncount(&num_fields_zval, result_handle, INTERNAL_FUNCTION_PARAM_PASSTHRU)) {
		return 0;
	}
	field_count=Z_LVAL_P(num_fields_zval);
	FREE_ZVAL(num_fields_zval);
	/* fetch row */
	number_of_arguments=1;
	arguments[0]=result_handle;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_fetch_row", &fetch_row_result_zval, number_of_arguments, arguments);
	if (!fetch_row_result_zval || Z_TYPE_P(fetch_row_result_zval)!=IS_BOOL) {
		if (fetch_row_result_zval) zval_ptr_dtor(&fetch_row_result_zval);
		return 0;
	}
	if (Z_LVAL_P(fetch_row_result_zval)==0) {
		Z_TYPE_PP(rv)=IS_LONG;
		Z_LVAL_PP(rv)=0; /* ok, no more rows */
		zval_ptr_dtor(&fetch_row_result_zval);
		return 0;
	}
	zval_ptr_dtor(&fetch_row_result_zval);
	/* fill array with field results... */
	MAKE_STD_ZVAL(returned_zval);
	if (array_init(returned_zval) != SUCCESS) {
		zend_error(E_ERROR, "dbx_odbc_getrow: unable to create result-array...");
		FREE_ZVAL(returned_zval);
		return 0;
	}
	MAKE_STD_ZVAL(field_index_zval);
	ZVAL_LONG(field_index_zval, 0);
	number_of_arguments=2;
	for (field_index=0; field_index<field_count; ++field_index) {
		ZVAL_LONG(field_index_zval, field_index+1);
		arguments[0]=result_handle;
		arguments[1]=&field_index_zval;
		dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_result", &field_result_zval, number_of_arguments, arguments);
		zend_hash_index_update(Z_ARRVAL_P(returned_zval), field_index, (void *)&(field_result_zval), sizeof(zval *), NULL);
	}
	FREE_ZVAL(field_index_zval);

	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_error(zval **rv, zval **dbx_handle, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns string */
	int number_of_arguments=1;
	zval **arguments[1];
	zval *returned_zval=NULL;

	arguments[0]=dbx_handle;
	if (!dbx_handle) number_of_arguments=0;
	dbx_call_any_function(INTERNAL_FUNCTION_PARAM_PASSTHRU, "odbc_errormsg", &returned_zval, number_of_arguments, arguments);
	if (!returned_zval || Z_TYPE_P(returned_zval)!=IS_STRING) {
		if (returned_zval) zval_ptr_dtor(&returned_zval);
		return 0;
	}
	MOVE_RETURNED_TO_RV(rv, returned_zval);
	return 1;
}

int dbx_odbc_esc(zval **rv, zval **dbx_handle, zval **string, INTERNAL_FUNCTION_PARAMETERS)
{
	/* returns escaped string */
	/* replace ' with '' */
	char * str;
	int len;
	char * tmpstr;
	int tmplen;

	if (Z_STRLEN_PP(string) == 0) {
		ZVAL_EMPTY_STRING(*rv);
		return 1;
	}
	tmpstr = estrdup(Z_STRVAL_PP(string));
	tmplen = Z_STRLEN_PP(string);
	/* php_str_to_str uses a smart_str that allocates memory */
	/* this memory must be freed or passed on to rv */
	str = php_str_to_str(tmpstr, tmplen, "'", 1, "''", 2, &len);
	efree(tmpstr);

	ZVAL_STRINGL(*rv, str, len, 0);

	return 1;
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */