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authorTimo Weingärtner <timo@tiwe.de>2011-11-06 00:00:31 +0100
committerTimo Weingärtner <timo@tiwe.de>2011-11-06 00:00:31 +0100
commit148e9eab1109789916a7b55ece957156a57ee4cf (patch)
tree8d93776269c965e1097e9b9c60ab02a59eee1aac /inode.h
downloadhadori-148e9eab1109789916a7b55ece957156a57ee4cf.tar.gz
initial commit0.1
Diffstat (limited to 'inode.h')
-rw-r--r--inode.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/inode.h b/inode.h
new file mode 100644
index 0000000..3040e71
--- /dev/null
+++ b/inode.h
@@ -0,0 +1,64 @@
+#include <string>
+#include <ostream>
+#include <fstream>
+
+#include <cstring>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <zlib.h>
+
+class inode {
+public:
+ std::string const filename;
+ struct stat const stat;
+protected:
+ uLong mutable adler;
+
+public:
+ inode (std::string const &, struct stat const);
+
+ uLong get_adler () const;
+
+ friend bool compare (inode const &, inode const &);
+ friend std::ostream& operator<< (std::ostream&, inode const &);
+};
+
+inline inode::inode (std::string const & __filename, struct stat const __stat) : filename(__filename), stat(__stat), adler(-1) {
+}
+
+inline uLong inode::get_adler () const {
+ if (adler == uLong(-1)) {
+ char buffer[1 << 14];
+ std::ifstream f(filename.c_str());
+
+ adler = adler32(0L, Z_NULL, 0);
+ while (not f.eof()) {
+ f.read(buffer, sizeof(buffer));
+ adler = adler32(adler, (Bytef *) buffer, f.gcount());
+ }
+ }
+ return adler;
+}
+
+inline bool compare (inode const & l, inode const & r) {
+ char lbuffer[1 << 14];
+ char rbuffer[1 << 14];
+ std::ifstream lf(l.filename.c_str());
+ std::ifstream rf(r.filename.c_str());
+
+ while (not lf.eof()) {
+ lf.read(lbuffer, sizeof(lbuffer));
+ rf.read(rbuffer, sizeof(rbuffer));
+ if (lf.gcount() != rf.gcount())
+ return false;
+ if (memcmp(lbuffer, rbuffer, lf.gcount()))
+ return false;
+ }
+ return true;
+}
+
+inline std::ostream& operator<< (std::ostream& os, inode const & i) {
+ os << "Inode " << i.stat.st_ino << ", represented by " << i.filename;
+ return os;
+}