/**
* Gets the data for a blob
*
* @param GitPHP_Blob $blob blob
* @return string blob data
*/
public function Load($blob)
{
if (!$blob) {
return;
}
return $this->objectLoader->GetObject($blob->GetHash());
}
/**
* Gets the data for a tree
*
* @param GitPHP_Tree $tree tree
* @return array array of tree contents
*/
public function Load($tree)
{
if (!$tree) {
return;
}
$contents = array();
$treePath = $tree->GetPath();
$treeData = $this->objectLoader->GetObject($tree->GetHash());
$start = 0;
$len = strlen($treeData);
while ($start < $len) {
$pos = strpos($treeData, "", $start);
list($mode, $path) = explode(' ', substr($treeData, $start, $pos - $start), 2);
$mode = str_pad($mode, 6, '0', STR_PAD_LEFT);
$hash = bin2hex(substr($treeData, $pos + 1, 20));
$start = $pos + 21;
$octmode = octdec($mode);
if ($octmode == 57344) {
// submodules not currently supported
continue;
}
if (!empty($treePath)) {
$path = $treePath . '/' . $path;
}
$data = array();
$data['hash'] = $hash;
if ($octmode & 0x4000) {
// tree
$data['type'] = 'tree';
} else {
// blob
$data['type'] = 'blob';
}
$data['mode'] = $mode;
$data['path'] = $path;
$contents[] = $data;
}
return $contents;
}
/**
* Abbreviate a hash
*
* @param GitPHP_Project $project project
* @param string $hash hash to abbreviate
* @return string abbreviated hash
*/
public function AbbreviateHash($project, $hash)
{
if (!$project) {
return $hash;
}
if (!preg_match('/[0-9A-Fa-f]{40}/', $hash)) {
return $hash;
}
$abbrevLen = GitPHP_ProjectLoad_Raw::HashAbbreviateLength;
$projAbbrevLen = $project->GetAbbreviateLength();
if ($projAbbrevLen > 0) {
$abbrevLen = max(4, min($projAbbrevLen, 40));
}
$prefix = substr($hash, 0, $abbrevLen);
if (!$project->GetUniqueAbbreviation()) {
return $prefix;
}
return $this->objectLoader->EnsureUniqueHash($hash, $prefix);
}
/**
* Gets the data for a commit
*
* @param GitPHP_Commit $commit commit
* @return array commit data
*/
public function Load($commit)
{
if (!$commit) {
return;
}
$abbreviatedHash = null;
$tree = null;
$parents = array();
$author = null;
$authorEpoch = null;
$authorTimezone = null;
$committer = null;
$committerEpoch = null;
$committerTimezone = null;
$title = null;
$comment = array();
$data = $this->objectLoader->GetObject($commit->GetHash());
if (empty($data)) {
return;
}
$lines = explode("\n", $data);
$linecount = count($lines);
$i = 0;
$encoding = null;
/* Commit header */
for ($i = 0; $i < $linecount; $i++) {
$line = $lines[$i];
if (preg_match('/^tree ([0-9a-fA-F]{40})$/', $line, $regs)) {
/* Tree */
$tree = $regs[1];
} else {
if (preg_match('/^parent ([0-9a-fA-F]{40})$/', $line, $regs)) {
/* Parent */
$parents[] = $regs[1];
} else {
if (preg_match('/^author (.*) ([0-9]+) (.*)$/', $line, $regs)) {
/* author data */
$author = $regs[1];
$authorEpoch = $regs[2];
$authorTimezone = $regs[3];
} else {
if (preg_match('/^committer (.*) ([0-9]+) (.*)$/', $line, $regs)) {
/* committer data */
$committer = $regs[1];
$committerEpoch = $regs[2];
$committerTimezone = $regs[3];
} else {
if (preg_match('/^encoding (.+)$/', $line, $regs)) {
$gitEncoding = trim($regs[1]);
if (strlen($gitEncoding) > 0 && function_exists('mb_list_encodings')) {
$supportedEncodings = mb_list_encodings();
$encIdx = array_search(strtolower($gitEncoding), array_map('strtolower', $supportedEncodings));
if ($encIdx !== false) {
$encoding = $supportedEncodings[$encIdx];
}
}
$encoding = trim($regs[1]);
} else {
if (strlen($line) == 0) {
break;
}
}
}
}
}
}
}
/* Commit body */
for ($i += 1; $i < $linecount; $i++) {
$trimmed = trim($lines[$i]);
if (strlen($trimmed) > 0 && strlen($encoding) > 0 && function_exists('mb_convert_encoding')) {
$trimmed = mb_convert_encoding($trimmed, 'UTF-8', $encoding);
}
if (empty($title) && strlen($trimmed) > 0) {
$title = $trimmed;
}
if (!empty($title)) {
if (strlen($trimmed) > 0 || $i < $linecount - 1) {
$comment[] = $trimmed;
}
}
}
return array($abbreviatedHash, $tree, $parents, $author, $authorEpoch, $authorTimezone, $committer, $committerEpoch, $committerTimezone, $title, $comment);
}
/**
* Gets the data for a tag
*
* @param GitPHP_Tag $tag tag
* @return array array of tag data
*/
public function Load($tag)
{
if (!$tag) {
return;
}
$type = null;
$object = null;
$commitHash = null;
$tagger = null;
$taggerEpoch = null;
$taggerTimezone = null;
$comment = array();
$data = $this->objectLoader->GetObject($tag->GetHash(), $packedType);
if ($packedType == GitPHP_Pack::OBJ_COMMIT) {
/* light tag */
$object = $tag->GetHash();
$commitHash = $tag->GetHash();
$type = 'commit';
return array($type, $object, $commitHash, $tagger, $taggerEpoch, $taggerTimezone, $comment);
}
$lines = explode("\n", $data);
if (!isset($lines[0])) {
return;
}
$objectHash = null;
$readInitialData = false;
foreach ($lines as $line) {
if (!$readInitialData) {
if (preg_match('/^object ([0-9a-fA-F]{40})$/', $line, $regs)) {
$objectHash = $regs[1];
continue;
} else {
if (preg_match('/^type (.+)$/', $line, $regs)) {
$type = $regs[1];
continue;
} else {
if (preg_match('/^tag (.+)$/', $line, $regs)) {
continue;
} else {
if (preg_match('/^tagger (.*) ([0-9]+) (.*)$/', $line, $regs)) {
$tagger = $regs[1];
$taggerEpoch = $regs[2];
$taggerTimezone = $regs[3];
continue;
}
}
}
}
}
$trimmed = trim($line);
if (strlen($trimmed) > 0 || $readInitialData === true) {
$comment[] = $line;
}
$readInitialData = true;
}
switch ($type) {
case 'commit':
$object = $objectHash;
$commitHash = $objectHash;
break;
case 'tag':
$object = $tag->GetProject()->GetTagList()->GetTagNameFromHash($objectHash);
break;
case 'blob':
$object = $objectHash;
break;
}
return array($type, $object, $commitHash, $tagger, $taggerEpoch, $taggerTimezone, $comment);
}
/**
* Unpacks an object at an offset
*
* @param resource $pack pack file pointer
* @param int $offset object offset
* @return array object type and data
*/
private function UnpackObject($pack, $offset)
{
fseek($pack, $offset);
/*
* object header:
* first byte is the type (high 3 bits) and low byte of size (lower 4 bits)
* subsequent bytes each have 7 next higher bits of the size (little endian)
* most significant bit is either 1 or 0 to indicate whether the next byte
* should be read as part of the size. 1 means continue reading the size,
* 0 means the data is starting
*/
$c = ord(fgetc($pack));
$type = $c >> 4 & 0x7;
$size = $c & 0xf;
for ($i = 4; $c & 0x80; $i += 7) {
$c = ord(fgetc($pack));
$size |= ($c & 0x7f) << $i;
}
if ($type == GitPHP_Pack::OBJ_COMMIT || $type == GitPHP_Pack::OBJ_TREE || $type == GitPHP_Pack::OBJ_BLOB || $type == GitPHP_Pack::OBJ_TAG) {
/*
* regular gzipped object data
*/
return array($type, gzuncompress(fread($pack, $size + 512), $size));
} else {
if ($type == GitPHP_Pack::OBJ_OFS_DELTA) {
/*
* delta of an object at offset
*/
$buf = fread($pack, $size + 512 + 20);
/*
* read the base object offset
* each subsequent byte's 7 least significant bits
* are part of the offset in decreasing significance per byte
* (opposite of other places)
* most significant bit is a flag indicating whether to read the
* next byte as part of the offset
*/
$pos = 0;
$off = -1;
do {
$off++;
$c = ord($buf[$pos++]);
$off = ($off << 7) + ($c & 0x7f);
} while ($c & 0x80);
/*
* next read the compressed delta data
*/
$delta = gzuncompress(mb_orig_substr($buf, $pos), $size);
$baseOffset = $offset - $off;
if ($baseOffset > 0) {
/*
* read base object at offset and apply delta to it
*/
list($type, $base) = $this->UnpackObject($pack, $baseOffset);
$data = GitPHP_PackData::ApplyDelta($delta, $base);
return array($type, $data);
}
} else {
if ($type == GitPHP_Pack::OBJ_REF_DELTA) {
/*
* delta of object with hash
*/
/*
* first the base object's hash
* load that object
*/
$hash = fread($pack, 20);
$hash = bin2hex($hash);
$base = $this->objectLoader->GetObject($hash, $type);
/*
* then the gzipped delta data
*/
$delta = gzuncompress(fread($pack, $size + 512), $size);
$data = GitPHP_PackData::ApplyDelta($delta, $base);
return array($type, $data);
}
}
}
return false;
}
