oysteikt/mpd
0
0
Fork 0
Code Issues Pull Requests Releases Activity

archive/iso9660: use a single path buffer for Visit()

Browse Source 
Avoid wasting 4 kB stack per directory level.
This commit is contained in:
Max Kellermann 2016-03-07 14:00:13 +01:00
parent c46fc4531b
commit de61c3b962
1 changed files with 13 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/archive/plugins/Iso9660ArchivePlugin.cxx
View File

@ -66,7 +66,8 @@ public:
return iso9660_iso_seek_read(iso, ptr, start, i_size);
}
void Visit(const char *path, ArchiveVisitor &visitor);
void Visit(char *path, size_t length,
ArchiveVisitor &visitor);
virtual void Close() override {
Unref();
@ -84,11 +85,10 @@ static constexpr Domain iso9660_domain("iso9660");
/* archive open && listing routine */
inline void
Iso9660ArchiveFile::Visit(const char *psz_path, ArchiveVisitor &visitor)
Iso9660ArchiveFile::Visit(char *path, size_t length,
ArchiveVisitor &visitor)
{
char pathname[4096];
auto *entlist = iso9660_ifs_readdir (iso, psz_path);
auto *entlist = iso9660_ifs_readdir(iso, path);
if (!entlist) {
return;
}
@ -101,15 +101,16 @@ Iso9660ArchiveFile::Visit(const char *psz_path, ArchiveVisitor &visitor)
if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
continue;
strcpy(pathname, psz_path);
strcat(pathname, filename);
size_t filename_length = strlen(filename);
memcpy(path + length, filename, filename_length + 1);
size_t new_length = length + filename_length;
if (iso9660_stat_s::_STAT_DIR == statbuf->type ) {
strcat(pathname, "/");
Visit(pathname, visitor);
memcpy(path + new_length, "/", 2);
Visit(path, new_length + 1, visitor);
} else {
//remove leading /
visitor.VisitArchiveEntry(pathname + 1);
visitor.VisitArchiveEntry(path + 1);
}
}
_cdio_list_free (entlist, true);
@ -133,7 +134,8 @@ iso9660_archive_open(Path pathname, Error &error)
void
Iso9660ArchiveFile::Visit(ArchiveVisitor &visitor)
{
Visit("/", visitor);
char path[4096] = "/";
Visit(path, 1, visitor);
}
/* single archive handling */