public function get_source(&$wiki, $index = -1)
{
$lines = $this->m_lines;
if ($index == -1) {
$index = count($lines) - 1;
}
if (!(0 <= $index && $index < count($lines))) {
return false;
}
$diffs = array();
$wiki = null;
for ($i = $index; $i >= 0; $i--) {
if ($this->m_sources[$i] !== null) {
$wiki = $this->m_sources[$i];
break;
}
$f = $this->get_fields($i);
if (substr($f[2], 0, 1) !== "!") {
$wiki = urldecode($f[2]);
$this->m_sources[$i] = $wiki;
break;
}
array_push($diffs, urldecode(substr($f[2], 1)));
}
$ndiff = $index - $i;
if ($i < 0) {
$this->perr("{$this->fname_hist}: there is no base entry for the diff!");
return false;
} else {
if ($ndiff > 0) {
// 差分適用
$ndiff = $index - $i;
$wiki = ldiff_split_lines($wiki);
while (++$i <= $index) {
$edits = preg_split('/\\n/u', $diffs[$index - $i]);
$wiki = $this->_apply_edits($wiki, $edits);
if ($wiki === false) {
return false;
}
$this->m_sources[$i] = implode("\n", $wiki);
}
$wiki = $this->m_sources[$index];
}
}
return $ndiff;
}
function ldiff_lines_sed($text1, $text2)
{
$arr1 = ldiff_split_lines($text1);
$arr2 = ldiff_split_lines($text2);
$M = $text1 == '' ? 0 : count($arr1);
$N = $text2 == '' ? 0 : count($arr2);
$path = _ldiff_getpath_wu($arr1, $M, $arr2, $N);
array_push($path, array($M, $N));
// 終端
$x = 0;
$y = 0;
$ret = '';
foreach ($path as $p) {
// 削除
$x0 = $p[0];
if ($x < $x0) {
$a1 = $x + 1;
$a2 = $x0;
if ($a1 == $a2) {
$ret .= $a1 . 'd' . PHP_EOL;
} else {
$ret .= $a1 . ',' . $a2 . 'd' . PHP_EOL;
}
$x = $x0;
}
// 挿入
$y0 = $p[1];
if ($y < $y0) {
$a1 = $x0 + 1;
for (; $y < $y0; $y++) {
$ret .= $a1 . 'i ' . $arr2[$y] . PHP_EOL;
}
}
// 共通部分は省略
for (; $x < $M && $y < $N && $arr1[$x] == $arr2[$y]; $x++, $y++) {
}
}
return $ret;
}