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Add sqlite_has_prev, and sqlite_prev.

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Patch by Jan Lehnardt <jan@php.net>
This commit is contained in:
Wez Furlong 2003-07-13 09:38:33 +00:00
parent 80ee75f11e
commit 78e236da26
3 changed files with 176 additions and 1 deletions
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3
ext/sqlite/php_sqlite.h
View File

@ -62,7 +62,10 @@ PHP_FUNCTION(sqlite_field_name);
PHP_FUNCTION(sqlite_seek);
PHP_FUNCTION(sqlite_rewind);
PHP_FUNCTION(sqlite_next);
PHP_FUNCTION(sqlite_prev);
PHP_FUNCTION(sqlite_has_more);
PHP_FUNCTION(sqlite_has_prev);
PHP_FUNCTION(sqlite_libversion);
PHP_FUNCTION(sqlite_libencoding);

71
ext/sqlite/sqlite.c
View File

@ -187,7 +187,9 @@ function_entry sqlite_functions[] = {
PHP_FE(sqlite_seek, NULL)
PHP_FE(sqlite_rewind, NULL)
PHP_FE(sqlite_next, NULL)
PHP_FE(sqlite_prev, NULL)
PHP_FE(sqlite_has_more, NULL)
PHP_FE(sqlite_has_prev, NULL)
PHP_FE(sqlite_escape_string, NULL)
PHP_FE(sqlite_busy_timeout, NULL)
PHP_FE(sqlite_last_error, NULL)
@ -232,7 +234,9 @@ function_entry sqlite_funcs_query[] = {
/* spl_forward */
PHP_ME_MAPPING(current, sqlite_current, NULL)
PHP_ME_MAPPING(next, sqlite_next, NULL)
PHP_ME_MAPPING(prev, sqlite_prev, NULL)
PHP_ME_MAPPING(has_more, sqlite_has_more, NULL)
PHP_ME_MAPPING(has_prev, sqlite_has_prev, NULL)
/* spl_sequence */
PHP_ME_MAPPING(rewind, sqlite_rewind, NULL)
/* additional */
@ -2056,6 +2060,35 @@ PHP_FUNCTION(sqlite_has_more)
}
/* }}} */
/* {{{ proto bool sqlite_has_prev(resource result)
* Returns whether a previous row is available. */
PHP_FUNCTION(sqlite_has_prev)
{
zval *zres;
struct php_sqlite_result *res;
zval *object = getThis();
if (object) {
if (ZEND_NUM_ARGS() != 0) {
WRONG_PARAM_COUNT
}
RES_FROM_OBJECT(res, object);
} else {
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &zres)) {
return;
}
ZEND_FETCH_RESOURCE(res, struct php_sqlite_result *, &zres, -1, "sqlite result", le_sqlite_result);
}
if(!res->buffered) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "you cannot use sqlite_has_prev on unbuffered querys");
RETURN_FALSE;
}
RETURN_BOOL(res->curr_row);
}
/* }}} */
/* {{{ proto int sqlite_num_fields(resource result)
Returns the number of fields in a result set. */
PHP_FUNCTION(sqlite_num_fields)
@ -2167,7 +2200,7 @@ PHP_FUNCTION(sqlite_rewind)
}
if (!res->buffered) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot seek an unbuffered result set");
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot rewind an unbuffered result set");
RETURN_FALSE;
}
@ -2216,6 +2249,42 @@ PHP_FUNCTION(sqlite_next)
}
/* }}} */
/* {{{ proto bool sqlite_prev(resource result)
* Seek to the previous row number of a result set. */
PHP_FUNCTION(sqlite_prev)
{
zval *zres;
struct php_sqlite_result *res;
zval *object = getThis();
if (object) {
if (ZEND_NUM_ARGS() != 0) {
WRONG_PARAM_COUNT
}
RES_FROM_OBJECT(res, object);
} else {
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &zres)) {
return;
}
ZEND_FETCH_RESOURCE(res, struct php_sqlite_result *, &zres, -1, "sqlite result", le_sqlite_result);
}
if (!res->buffered) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "you cannot use sqlite_prev on unbuffered querys");
RETURN_FALSE;
}
if (res->curr_row <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "no previous row available");
RETURN_FALSE;
}
res->curr_row--;
RETURN_TRUE;
}
/* }}} */
/* {{{ proto string sqlite_escape_string(string item)
Escapes a string for use as a query parameter. */
PHP_FUNCTION(sqlite_escape_string)

103
ext/sqlite/tests/sqlite_023.phpt Normal file
View File

@ -0,0 +1,103 @@
--TEST--
sqlite: sqlite_[has_]prev
--INI--
sqlite.assoc_case=0
--SKIPIF--
<?php # vim:ft=php
if (!extension_loaded("sqlite")) print "skip"; ?>
--FILE--
<?php
include "blankdb.inc";
$data = array(
"one",
"two",
"three"
);
sqlite_query("CREATE TABLE strings(a)", $db);
foreach ($data as $str) {
sqlite_query("INSERT INTO strings VALUES('$str')", $db);
}
$r = sqlite_query("SELECT a FROM strings", $db, SQLITE_NUM);
echo "====TRAVERSE====\n";
for(sqlite_rewind($r); sqlite_has_more($r); sqlite_next($r)) {
var_dump(sqlite_current($r));
}
echo "====REVERSE====\n";
do {
sqlite_prev($r);
var_dump(sqlite_current($r));
} while(sqlite_has_prev($r));
echo "====UNBUFFERED====\n";
$r = sqlite_unbuffered_query("SELECT a FROM strings", $db, SQLITE_NUM);
echo "====TRAVERSE====\n";
for(sqlite_rewind($r); sqlite_has_more($r); sqlite_next($r)) {
var_dump(sqlite_current($r));
}
echo "====REVERSE====\n";
do {
sqlite_prev($r);
var_dump(sqlite_current($r));
} while(sqlite_has_prev($r));
echo "====DONE!====\n";
?>
--EXPECTF--
====TRAVERSE====
array(1) {
[0]=>
string(3) "one"
}
array(1) {
[0]=>
string(3) "two"
}
array(1) {
[0]=>
string(5) "three"
}
====REVERSE====
array(1) {
[0]=>
string(5) "three"
}
array(1) {
[0]=>
string(3) "two"
}
array(1) {
[0]=>
string(3) "one"
}
====UNBUFFERED====
====TRAVERSE====
Warning: sqlite_rewind(): Cannot rewind an unbuffered result set in %ssqlite_023.php on line %d
array(1) {
[0]=>
string(3) "one"
}
array(1) {
[0]=>
string(3) "two"
}
array(1) {
[0]=>
string(5) "three"
}
====REVERSE====
Warning: sqlite_prev(): you cannot use sqlite_prev on unbuffered querys in %ssqlite_023.php on line %d
bool(false)
Warning: sqlite_has_prev(): you cannot use sqlite_has_prev on unbuffered querys in %ssqlite_023.php on line %d
====DONE!====