diff options
| author | Julian Andres Klode <julian.klode@canonical.com> | 2018-03-09 15:15:27 +0100 |
|---|---|---|
| committer | Julian Andres Klode <julian.klode@canonical.com> | 2018-04-13 23:15:06 +0200 |
| commit | 7cf73b7a1e4f127098cae5b8593cd1d0c675e4a4 (patch) | |
| tree | abd0c6bfcbef81f4f3409f666d4c3ff93ebc4559 /apt-pkg/contrib | |
| parent | 9dfbfb24350b1d6b2f48ce66df8873c072f34a06 (diff) | |
zstd: Implement support for multi-frame files
This implements support for multi frame files while keeping
error checking for unexpected EOF working correctly. Files
with multiple frames are generated by pzstd, for example.
Diffstat (limited to 'apt-pkg/contrib')
| -rw-r--r-- | apt-pkg/contrib/fileutl.cc | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index 5acf40221..85d7b36c7 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -1764,7 +1764,7 @@ class APT_HIDDEN ZstdFileFdPrivate : public FileFdPrivate virtual ssize_t InternalUnbufferedRead(void *const To, unsigned long long const Size) APT_OVERRIDE { /* Keep reading as long as the compressor still wants to read */ - while (next_to_load) + while (true) { // Fill compressed buffer; if (zstd_buffer.empty()) @@ -1776,9 +1776,12 @@ class APT_HIDDEN ZstdFileFdPrivate : public FileFdPrivate return -1; zstd_buffer.bufferend += read; - /* Expected EOF */ if (read == 0) { + /* Expected EOF */ + if (next_to_load == 0) + return 0; + res = -1; return filefd->FileFdError("ZSTD: %s %s", filefd->FileName.c_str(), @@ -1798,11 +1801,16 @@ class APT_HIDDEN ZstdFileFdPrivate : public FileFdPrivate .pos = 0, }; - res = ZSTD_decompressStream(dctx, &out, &in); + next_to_load = res = ZSTD_decompressStream(dctx, &out, &in); + + if (res == 0) + { + res = ZSTD_initDStream(dctx); + } + if (ZSTD_isError(res)) return -1; - next_to_load = res; zstd_buffer.bufferstart += in.pos; if (out.pos != 0) |