From 85ae78176520fbba0420e5dc772d76144b564605 Mon Sep 17 00:00:00 2001 From: Eelco Dolstra Date: Sun, 20 Jun 2004 13:37:51 +0000 Subject: * Refactoring. --- src/libutil/util.cc | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) (limited to 'src/libutil/util.cc') diff --git a/src/libutil/util.cc b/src/libutil/util.cc index 676404ecfca6..2cfada35450a 100644 --- a/src/libutil/util.cc +++ b/src/libutil/util.cc @@ -446,3 +446,48 @@ void _interrupted() throw Error("interrupted by the user"); } } + + +string packStrings(const Strings & strings) +{ + string d; + for (Strings::const_iterator i = strings.begin(); + i != strings.end(); ++i) + { + unsigned int len = i->size(); + d += len & 0xff; + d += (len >> 8) & 0xff; + d += (len >> 16) & 0xff; + d += (len >> 24) & 0xff; + d += *i; + } + return d; +} + + +Strings unpackStrings(const string & s) +{ + Strings strings; + + string::const_iterator i = s.begin(); + + while (i != s.end()) { + + if (i + 4 > s.end()) + throw Error(format("short db entry: `%1%'") % s); + + unsigned int len; + len = (unsigned char) *i++; + len |= ((unsigned char) *i++) << 8; + len |= ((unsigned char) *i++) << 16; + len |= ((unsigned char) *i++) << 24; + + if (i + len > s.end()) + throw Error(format("short db entry: `%1%'") % s); + + strings.push_back(string(i, i + len)); + i += len; + } + + return strings; +} -- cgit 1.4.1