move case-insensitive string stuff to utils.h

1 files changed, 28 insertions, 0 deletions

diff --git a/tools/utils.c b/tools/utils.c
index a7c2878..6dbbff4 100644
--- a/tools/utils.c
+++ b/tools/utils.c
@@ -87,3 +87,31 @@ string purify(const string arg){
   }
   return rslt;
 }
+
+// Returns negative if a is less than b in alphabetical order
+// returns 0 if they are the same, or positive if a is greater.
+// Like perl cmp operator, but ignores case.
+int cmp_casefold(const std::string& a, const std::string& b) {
+  string::const_iterator aa, bb;
+  aa = a.begin();
+  bb = b.begin();
+  while (aa != a.end() && bb != b.end()){
+    char ca = tolower(*aa++);
+    char cb = tolower(*bb++);
+    if (ca != cb) return ca < cb ? -2 : 2;
+  }
+  if (aa != a.end()) return 1;          // a is longer
+  if (bb != b.end()) return -1;         // b is longer
+  return 0;
+}
+
+string noCR(const string bar){
+  string foo(bar);
+  int len = foo.length();
+  if (len){
+    if (foo[len-1] == '\r') {
+      foo.erase(len-1);
+    }
+  }
+  return foo;
+}