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-rw-r--r--apt-pkg/contrib/strutl.cc24
1 files changed, 18 insertions, 6 deletions
diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index 922229e90..87f57a30e 100644
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -45,14 +45,26 @@ using namespace std;
// ---------------------------------------------------------------------
namespace APT {
namespace String {
-std::string Strip(const std::string &s)
+std::string Strip(const std::string &str)
{
- size_t start = s.find_first_not_of(" \t\n");
- // only whitespace
- if (start == string::npos)
+ // ensure we have at least one character
+ if (str.empty() == true)
+ return str;
+
+ char const * const s = str.c_str();
+ size_t start = 0;
+ for (; isspace(s[start]) != 0; ++start)
+ ; // find the first not-space
+
+ // string contains only whitespaces
+ if (s[start] == '\0')
return "";
- size_t end = s.find_last_not_of(" \t\n");
- return s.substr(start, end-start+1);
+
+ size_t end = str.length() - 1;
+ for (; isspace(s[end]) != 0; --end)
+ ; // find the last not-space
+
+ return str.substr(start, end - start + 1);
}
bool Endswith(const std::string &s, const std::string &end)