--- /dev/null
+<?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;
+}
+
+
+
+?>
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