From 1276a28b88295caf27c5df97d2e61b28feed3999 Mon Sep 17 00:00:00 2001
From: Matthew Krupcale <mkrupcale@matthewkrupcale.com>
Date: Sun, 9 Aug 2020 09:37:19 -0400
Subject: Add iterator-based versions of find_option{,_prefix}

This allows one to use all of the properties of iterators to manipulate the
found option.
---
 libbuild2/utility.ixx | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'libbuild2/utility.ixx')

diff --git a/libbuild2/utility.ixx b/libbuild2/utility.ixx
index da9f58b..dc8b42a 100644
--- a/libbuild2/utility.ixx
+++ b/libbuild2/utility.ixx
@@ -139,6 +139,17 @@ namespace build2
     return find_option (o, s[var], ic);
   }
 
+  template <typename I>
+  I
+  find_option (const char* o, I b, I e, bool ic)
+  {
+    for (; b != e; ++b)
+      if ((ic ? icasecmp (*b, o) : strcmp (*b, o)) == 0)
+        return b;
+
+    return e;
+  }
+
   template <typename T>
   inline bool
   find_options (const initializer_list<const char*>& os,
@@ -173,6 +184,19 @@ namespace build2
     return find_option_prefix (p, s[var], ic);
   }
 
+  template <typename I>
+  I
+  find_option_prefix (const char* p, I rb, I re, bool ic)
+  {
+    size_t n (strlen (p));
+
+    for (; rb != re; ++rb)
+      if ((ic ? icasecmp (*rb, p, n) : strncmp (*rb, p, n)) == 0)
+        return rb;
+
+    return re;
+  }
+
   template <typename T>
   inline const string*
   find_option_prefixes (const initializer_list<const char*>& ps,
-- 
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