Implement compiler guessing, including icc and msvc

1 files changed, 37 insertions, 0 deletions

diff --git a/build2/utility.cxx b/build2/utility.cxx
index c3dd99f..1b8be65 100644
--- a/build2/utility.cxx
+++ b/build2/utility.cxx
@@ -46,6 +46,43 @@ namespace build2
   // <build2/utility>
   //
 
+  string&
+  trim (string& l)
+  {
+    /*
+    assert (trim (r = "") == "");
+    assert (trim (r = " ") == "");
+    assert (trim (r = " \t\r") == "");
+    assert (trim (r = "a") == "a");
+    assert (trim (r = " a") == "a");
+    assert (trim (r = "a ") == "a");
+    assert (trim (r = " \ta") == "a");
+    assert (trim (r = "a \r") == "a");
+    assert (trim (r = " a ") == "a");
+    assert (trim (r = " \ta \r") == "a");
+    */
+
+    size_t i (0), n (l.size ());
+
+    for (char c;
+         i != n && ((c = l[i]) == ' ' || c == '\t' || c == '\r');
+         ++i) ;
+
+    for (char c;
+         n != i && ((c = l[n - 1]) == ' ' || c == '\t' || c == '\r');
+         --n) ;
+
+    if (i != 0)
+    {
+      string s (l, i, n - i);
+      l.swap (s);
+    }
+    else if (n != l.size ())
+      l.resize (n);
+
+    return l;
+  }
+
   const string empty_string;
   const path empty_path;
   const dir_path empty_dir_path;