added getStringBetween

1 files changed, 51 insertions, 1 deletions

diff --git a/src/StringUtil.cc b/src/StringUtil.cc
index 036a4f4..ba5f58d 100644
--- a/src/StringUtil.cc
+++ b/src/StringUtil.cc
@@ -19,7 +19,7 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-// $Id: StringUtil.cc,v 1.5 2002/01/09 14:11:20 fluxgen Exp $
+// $Id: StringUtil.cc,v 1.6 2002/01/21 01:56:39 fluxgen Exp $
 
 #include "StringUtil.hh"
 
@@ -74,3 +74,53 @@ char *StringUtil::expandFilename(const char *filename) {
   
   return StringUtil::strdup(retval.get());      //return modified value
 }
+
+//------------- getStringBetween -----------
+// Parses a string between "first" and "last" characters
+// and ignoring ok_chars as whitespaces. The value is
+// returned in "out".
+// Returns negative value on error and this value is the position 
+// in the in-string where the error occured.
+// Returns positive value on success and this value is
+// for the position + 1 in the in-string where the "last"-char value
+// was found.
+//------------------------------------------
+int StringUtil::getStringBetween(string& out, const char *instr, const char first, const char last,
+                        const char *ok_chars) {
+        assert(first);
+        assert(last);
+        assert(instr);
+        
+        string::size_type i = 0, 
+                total_add=0; //used to add extra if there is a \last to skip
+        string in(instr);
+        
+        // eat leading whitespace
+        i = in.find_first_not_of(ok_chars);
+        if (i == string::npos)
+                return -in.size();   // nothing left but whitespace
+
+        if (in[i]!=first)               
+                return -i; //return position to error   
+
+        // find the end of the token
+        string::size_type j = i;
+        while (1) {
+                j = in.find_first_of(last, j+1);
+                if (j==string::npos)
+                        return -in.size(); //send negative size
+
+                //we found the last char, check so it doesn't have a '\' before
+                if (j>1 && in[j-1] != '\\')     
+                        break;
+                else if (j>1) {
+                        in.erase(j-1, 1); //remove the '\'
+                        j--;
+                        total_add++; //save numchars removed so we can calculate totalpos
+                }
+        }
+
+        out = in.substr(i+1, j-i-1); //copy the string between first and last           
+        //return value to last character
+        return (j+1+total_add);
+}