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<?php
/***************************************************************************\
* SPIP, Systeme de publication pour l'internet *
* *
* Copyright (c) 2001-2014 *
* Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James *
* *
* Ce programme est un logiciel libre distribue sous licence GNU/GPL. *
* Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne. *
\***************************************************************************/
if (!defined('_ECRIRE_INC_VERSION')) return;
/*
* Des fonctions pour les requetes SQL
*
* Voir la liste des fonctions natives : http://www.sqlite.org/lang_corefunc.html
* Et la liste des evolutions pour : http://sqlite.org/changes.html
*
*/
// http://doc.spip.org/@_sqlite_init_functions
function _sqlite_init_functions(&$sqlite){
if (!$sqlite) return false;
$fonctions = array(
'CONCAT' => array( '_sqlite_func_concat' ,-1),
'CEIL' => array( '_sqlite_func_ceil', 1), // absent de sqlite2
'DATE_FORMAT' => array( '_sqlite_func_strftime' ,2),
'DAYOFMONTH' => array( '_sqlite_func_dayofmonth' ,1),
'EXTRAIRE_MULTI' => array( '_sqlite_func_extraire_multi', 2), // specifique a SPIP/sql_multi()
'EXP' => array( 'exp' ,1),//exponentielle
'FIND_IN_SET' => array( '_sqlite_func_find_in_set' ,2),
'FLOOR' => array( '_sqlite_func_floor', 1), // absent de sqlite2
'IF' => array( '_sqlite_func_if' ,3),
'INSERT' => array( '_sqlite_func_insert' ,4),
'INSTR' => array( '_sqlite_func_instr' ,2),
'LEAST' => array( '_sqlite_func_least' ,3),
'_LEFT' => array( '_sqlite_func_left' ,2),
# 'LENGTH' => array( 'strlen' ,1), // present v1.0.4
# 'LOWER' => array( 'strtolower' ,1), // present v2.4
# 'LTRIM' => array( 'ltrim' ,1), // present en theorie
'NOW' => array( '_sqlite_func_now' ,0),
'MD5' => array( 'md5' ,1),
'MONTH' => array( '_sqlite_func_month' ,1),
'PREG_REPLACE' => array( '_sqlite_func_preg_replace' ,3),
'RAND' => array( '_sqlite_func_rand' ,0), // sinon random() v2.4
'REGEXP' => array( '_sqlite_func_regexp_match' ,2), // critere REGEXP supporte a partir de v3.3.2
//'REGEXP_MATCH' => array( '_sqlite_func_regexp_match' ,2), // critere REGEXP supporte a partir de v3.3.2
'RIGHT' => array( '_sqlite_func_right' ,2),
# 'RTRIM' => array( 'rtrim' ,1), // present en theorie
'SETTYPE' => array( 'settype' ,2), // CAST present en v3.2.3
'SQRT' => array( 'sqrt' ,1),
'SUBSTRING' => array( '_sqlite_func_substring' /*,3*/), // peut etre appelee avec 2 ou 3 arguments, index base 1 et non 0
'TO_DAYS' => array( '_sqlite_func_to_days' ,1),
# 'TRIM' => array( 'trim' ,1), // present en theorie
'TIMESTAMPDIFF' => array('_sqlite_timestampdiff' /*,3*/),
'UNIX_TIMESTAMP'=> array( '_sqlite_func_unix_timestamp' ,1),
# 'UPPER' => array( 'strtoupper' ,1), // present v2.4
'VIDE' => array( '_sqlite_func_vide' ,0), // du vide pour SELECT 0 as x ... ORDER BY x -> ORDER BY vide()
'YEAR' => array( '_sqlite_func_year' ,1)
);
foreach ($fonctions as $f=>$r){
_sqlite_add_function($sqlite, $f, $r);
}
#spip_log('functions sqlite chargees ','sqlite.'._LOG_DEBUG);
}
// permet au besoin de charger des fonctions ailleurs par _sqlite_init_functions();
// http://doc.spip.org/@_sqlite_add_function
function _sqlite_add_function(&$sqlite, &$f, &$r){
if (_sqlite_is_version(3, $sqlite)){
isset($r[1])
?$sqlite->sqliteCreateFunction($f, $r[0], $r[1])
:$sqlite->sqliteCreateFunction($f, $r[0]);
} else {
isset($r[1])
?sqlite_create_function($sqlite, $f, $r[0], $r[1])
:sqlite_create_function($sqlite, $f, $r[0]);
}
}
//
// SQLite : fonctions sqlite -> php
// entre autre auteurs : mlebas
//
function _sqlite_func_ceil($a) {
return ceil($a);
}
// http://doc.spip.org/@_sqlite_func_concat
function _sqlite_func_concat () {
$args = func_get_args();
return join('',$args);
}
// http://doc.spip.org/@_sqlite_func_dayofmonth
function _sqlite_func_dayofmonth ($d) {
return _sqlite_func_date("d",$d);
}
// http://doc.spip.org/@_sqlite_func_find_in_set
function _sqlite_func_find_in_set($num, $set) {
$rank=0;
foreach (explode(",",$set) as $v) {
if ($v == $num) return (++$rank);
$rank++;
}
return 0;
}
function _sqlite_func_floor($a) {
return floor($a);
}
// http://doc.spip.org/@_sqlite_func_if
function _sqlite_func_if ($bool, $oui, $non) {
return ($bool)?$oui:$non;
}
/*
* INSERT(chaine, index, longueur, chaine) MySQL
* Retourne une chaine de caracteres a partir d'une chaine dans laquelle "sschaine"
* a ete inseree a la position "index" en remplacant "longueur" caracteres.
*/
// http://doc.spip.org/@_sqlite_func_insert
function _sqlite_func_insert ($s, $index, $longueur, $chaine) {
return
substr($s,0, $index)
. $chaine
. substr(substr($s, $index), $longueur);
}
// http://doc.spip.org/@_sqlite_func_instr
function _sqlite_func_instr ($s, $search) {
return strpos($s,$search);
}
// http://doc.spip.org/@_sqlite_func_least
function _sqlite_func_least () {
$arg_list = func_get_args();
$least = min($arg_list);
#spip_log("Passage avec LEAST : $least",'sqlite.'._LOG_DEBUG);
return $least;
}
// http://doc.spip.org/@_sqlite_func_left
function _sqlite_func_left ($s, $lenght) {
return substr($s,0,$lenght);
}
// http://doc.spip.org/@_sqlite_func_now
function _sqlite_func_now(){
static $now = null;
if (is_null($now))
$now = date("Y-m-d H:i:s");
#spip_log("Passage avec NOW : $now",'sqlite.'._LOG_DEBUG);
return $now;
}
// http://doc.spip.org/@_sqlite_func_month
function _sqlite_func_month ($d) {
return _sqlite_func_date("m",$d);
}
// http://doc.spip.org/@_sqlite_func_preg_replace
function _sqlite_func_preg_replace($quoi, $cherche, $remplace) {
$return = preg_replace('%'.$cherche.'%', $remplace, $quoi);
#spip_log("preg_replace : $quoi, $cherche, $remplace, $return",'sqlite.'._LOG_DEBUG);
return $return;
}
/**
* Extrait une langue d'un texte <multi>[fr] xxx [en] yyy</multi>
*
* @param string $quoi le texte contenant ou non un multi
* @param string $lang la langue a extraire
* @return string, l'extrait trouve.
**/
function _sqlite_func_extraire_multi($quoi, $lang) {
if (!defined('_EXTRAIRE_MULTI'))
include_spip('inc/filtres');
if (!function_exists('approcher_langue'))
include_spip('inc/lang');
if (preg_match_all(_EXTRAIRE_MULTI, $quoi, $regs, PREG_SET_ORDER)) {
foreach ($regs as $reg) {
// chercher la version de la langue courante
$trads = extraire_trads($reg[1]);
if ($l = approcher_langue($trads, $lang)) {
$trad = $trads[$l];
} else {
$trad = reset($trads);
}
$quoi = str_replace($reg[0], $trad, $quoi);
}
}
return $quoi;
}
// http://doc.spip.org/@_sqlite_func_rand
function _sqlite_func_rand() {
return rand();
}
// http://doc.spip.org/@_sqlite_func_right
function _sqlite_func_right ($s, $length) {
return substr($s,0 - $length);
}
// http://doc.spip.org/@_sqlite_func_regexp_match
function _sqlite_func_regexp_match($cherche, $quoi) {
// optimiser un cas tres courant avec les requetes en base
if (!$quoi AND !strlen($quoi)) return false;
$u = $GLOBALS['meta']['pcre_u'];
$return = preg_match('%'.$cherche.'%imsS'.$u, $quoi);
#spip_log("regexp_replace : $quoi, $cherche, $remplace, $return",'sqlite.'._LOG_DEBUG);
return $return;
}
// http://doc.spip.org/@_sqlite_func_strftime
function _sqlite_func_strftime($date, $conv){
return strftime($conv, is_int($date)?$date:strtotime($date));
}
/**
* Nombre de jour entre 0000-00-00 et $d
* http://doc.spip.org/@_sqlite_func_to_days
* cf http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_to-days
* @param string $d
* @return int
*/
function _sqlite_func_to_days ($d) {
static $offset = 719528; // nb de jour entre 0000-00-00 et timestamp 0=1970-01-01
$result = $offset+(int)ceil(_sqlite_func_unix_timestamp($d)/(24*3600));
#spip_log("Passage avec TO_DAYS : $d, $result",'sqlite.'._LOG_DEBUG);
return $result;
}
function _sqlite_func_substring($string,$start,$len=null){
// SQL compte a partir de 1, php a partir de 0
$start = ($start>0)?$start-1:$start;
if (is_null($len))
return substr($string,$start);
else
return substr($string,$start,$len);
}
/**
* Calcul de la difference entre 2 timestamp, exprimes dans l'unite fournie en premier argument
* emule https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_timestampdiff
* @param string $unit
* @param string $date1
* @param string $date2
* @return int
*/
function _sqlite_timestampdiff($unit,$date1,$date2){
// PHP >= 5.3
if (function_exists("date_diff")){
$d1 = date_create($date1);
$d2 = date_create($date2);
$diff = date_diff($d1,$d2);
$inv = $diff->invert?-1:1;
switch($unit){
case "YEAR":
return $inv*$diff->y;
case "QUARTER":
return $inv*(4*$diff->y+intval(floor($diff->m/3)));
case "MONTH":
return $inv*(12*$diff->y+$diff->m);
case "WEEK":
return $inv*intval(floor($diff->days/7));
case "DAY":
#var_dump($inv*$diff->days);
return $inv*$diff->days;
case "HOUR":
return $inv*(24*$diff->days+$diff->h);
case "MINUTE":
return $inv*((24*$diff->days+$diff->h)*60+$diff->i);
case "SECOND":
return $inv*(((24*$diff->days+$diff->h)*60+$diff->i)*60+$diff->s);
case "MICROSECOND":
return $inv*(((24*$diff->days+$diff->h)*60+$diff->i)*60+$diff->s)*1000000;
}
return 0;
}
// PHP < 5.3
else {
$d1 = strtotime($date1);
$d2 = strtotime($date2);
$diff = $d2 - $d1;
$sign = ($diff<0?-1:1);
$diff = $sign * $diff;
switch($unit){
case "YEAR":
$diff = $d2-$d1;
return $sign*(date('Y',abs($diff))-date('Y',0));
case "QUARTER":
return $sign*(4*(date('Y',abs($diff))-date('Y',0))+intval(floor((date('m',$diff)-1)/3)));
case "MONTH":
return $sign*((date('Y',$diff)-date('Y',0))*12+date('m',$diff)-1);
case "WEEK":
return intval(floor(($d2-$d1)/3600/7));
case "DAY":
return intval(floor(($d2-$d1)/3600/24));
case "HOUR":
return intval(floor(($d2-$d1)/3600));
case "MINUTE":
return intval(floor(($d2-$d1)/60));
case "SECOND":
return $d2-$d1;
case "MICROSECOND":
return $d2-$d1*1000000;
}
}
}
// http://doc.spip.org/@_sqlite_func_unix_timestamp
function _sqlite_func_unix_timestamp($d) {
static $mem = array();
static $n = 0;
if (isset($mem[$d])) return $mem[$d];
if ($n++>100) {$mem = array();$n=0;}
//2005-12-02 20:53:53
#spip_log("Passage avec UNIX_TIMESTAMP : $d",'sqlite.'._LOG_DEBUG);
if (!$d) return $mem[$d] = mktime();
// une pile plus grosse n'accelere pas le calcul
return $mem[$d] = strtotime($d);
}
// http://doc.spip.org/@_sqlite_func_year
function _sqlite_func_year ($d) {
return _sqlite_func_date("Y",$d);
}
/**
* version optimisee et memoizee de date() utilisee par
* _sqlite_func_year, _sqlite_func_month, _sqlite_func_dayofmonth
* @param string $quoi
* format : Y, m, ou d
* @param int $d
* timestamp
* @return int
*/
function _sqlite_func_date($quoi,$d) {
static $mem = array();
static $n = 0;
if (isset($mem[$d])) return $mem[$d][$quoi];
if ($n++>100) {$mem = array();$n=0;}
$dec = date("Y-m-d",_sqlite_func_unix_timestamp($d));
$mem[$d] = array("Y"=>substr($dec,0,4),"m"=>substr($dec,5,2),"d"=>substr($dec,8,2));
return $mem[$d][$quoi];
}
// http://doc.spip.org/@_sqlite_func_vide
function _sqlite_func_vide(){
return;
}
?>