From 87c6a5ed4ec515c2e154f98529c1d2f077d2a7e4 Mon Sep 17 00:00:00 2001
From: Michael Vrable <mvrable@cs.ucsd.edu>
Date: Fri, 20 Jul 2007 10:05:06 -0700
Subject: [PATCH] Add support for octal and hexadecimal output in dumps.

Switch to using octal for file modesin metadata listings, since this is
more readable.
---
 scandir.cc |  2 +-
 util.cc    | 22 ++++++++++++++++++----
 util.h     |  2 +-
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/scandir.cc b/scandir.cc
index 4ffd078..f5ab2b6 100644
--- a/scandir.cc
+++ b/scandir.cc
@@ -280,7 +280,7 @@ void dump_inode(const string& path,         // Path within snapshot
 
     printf("%s\n", path.c_str());
 
-    file_info["mode"] = encode_int(stat_buf.st_mode & 07777);
+    file_info["mode"] = encode_int(stat_buf.st_mode & 07777, 8);
     file_info["mtime"] = encode_int(stat_buf.st_mtime);
     file_info["user"] = encode_int(stat_buf.st_uid);
     file_info["group"] = encode_int(stat_buf.st_gid);
diff --git a/util.cc b/util.cc
index 9e985af..c1b5f41 100644
--- a/util.cc
+++ b/util.cc
@@ -71,18 +71,32 @@ string uri_decode(const string &in)
     return result;
 }
 
-/* Return the string representation of an integer. */
-string encode_int(long long n)
+/* Return the string representation of an integer.  Will try to produce output
+ * in decimal, hexadecimal, or octal according to base, though this is just
+ * advisory.  For negative numbers, will always use decimal. */
+string encode_int(long long n, int base)
 {
     char buf[64];
+
+    if (n >= 0 && base == 16) {
+        sprintf(buf, "0x%llx", n);
+        return buf;
+    }
+
+    if (n > 0 && base == 8) {
+        sprintf(buf, "0%llo", n);
+        return buf;
+    }
+
     sprintf(buf, "%lld", n);
     return buf;
 }
 
-/* Return the string representation of an integer. */
+/* Parse the string representation of an integer.  Accepts decimal, octal, and
+ * hexadecimal, just as C would (recognizes the 0 and 0x prefixes). */
 long long parse_int(const string &s)
 {
-    return strtoll(s.c_str(), NULL, 10);
+    return strtoll(s.c_str(), NULL, 0);
 }
 
 /* Output a dictionary of string key/value pairs to the given output stream.
diff --git a/util.h b/util.h
index 7cb9bf4..89ceac7 100644
--- a/util.h
+++ b/util.h
@@ -14,7 +14,7 @@
 
 std::string uri_encode(const std::string &in);
 std::string uri_decode(const std::string &in);
-std::string encode_int(long long n);
+std::string encode_int(long long n, int base=10);
 void dict_output(std::ostream &o, std::map<std::string, std::string> dict);
 
 long long parse_int(const std::string &s);
-- 
2.20.1