From 940227416e3e152398b0fcb508481d7310a97cf7 Mon Sep 17 00:00:00 2001
From: Adrien Beraud <adrien.beraud@savoirfairelinux.com>
Date: Tue, 8 Aug 2017 11:55:10 -0400
Subject: [PATCH] archiver: add Gzip support
Add methods for Gzip file compression/decompression.
Change-Id: I81d52c09a98b835c32d7a07ab2cb9a22aca19e8e
Reviewed-by: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
---
src/archiver.cpp | 27 +++++++++++++++++++++++++++
src/archiver.h | 10 ++++++++++
2 files changed, 37 insertions(+)
diff --git a/src/archiver.cpp b/src/archiver.cpp
index b90500538c..4c3c8631a6 100644
--- a/src/archiver.cpp
+++ b/src/archiver.cpp
@@ -223,6 +223,33 @@ compress(const std::string& str)
return outbuffer;
}
+void
+compressGzip(const std::string& str, const std::string& path)
+{
+ auto fi = gzopen(path.c_str(), "wb");
+ gzwrite(fi, str.data(), str.size());
+ gzclose(fi);
+}
+
+std::vector<uint8_t>
+decompressGzip(const std::string& path)
+{
+ std::vector<uint8_t> out;
+ auto fi = gzopen(path.c_str(),"rb");
+ gzrewind(fi);
+ while (not gzeof(fi)) {
+ std::array<uint8_t, 32768> outbuffer;
+ int len = gzread(fi, outbuffer.data(), outbuffer.size());
+ if (len == -1) {
+ gzclose(fi);
+ throw std::runtime_error("Exception during gzip decompression");
+ }
+ out.insert(out.end(), outbuffer.begin(), outbuffer.begin() + len);
+ }
+ gzclose(fi);
+ return out;
+}
+
std::vector<uint8_t>
decompress(const std::vector<uint8_t>& str)
{
diff --git a/src/archiver.h b/src/archiver.h
index cfdf613172..f7b637d041 100644
--- a/src/archiver.h
+++ b/src/archiver.h
@@ -64,6 +64,16 @@ std::vector<uint8_t> compress(const std::string& str);
*/
std::vector<uint8_t> decompress(const std::vector<uint8_t>& dat);
+/**
+ * Compress string to a Gzip file
+ */
+void compressGzip(const std::string& str, const std::string& path);
+
+/**
+ * Decompress Gzip file to bytes
+ */
+std::vector<uint8_t> decompressGzip(const std::string& path);
+
}
} // namespace ring
--
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