From 7c24c5d0de4d3584d6d2f9f3c26b4d757b0a0df2 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Wed, 10 Oct 2018 07:59:51 +0200
Subject: Fix sibs test not including parent library correctly

Refactor config parsing to reduce number of changes when introducing a
new platform to support
---
 src/Platform.cpp | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'src/Platform.cpp')

diff --git a/src/Platform.cpp b/src/Platform.cpp
index 9b02ca5..dd81667 100644
--- a/src/Platform.cpp
+++ b/src/Platform.cpp
@@ -1,7 +1,31 @@
 #include "../include/Platform.hpp"
+#include <cassert>
 
 namespace sibs
 {
+    static int countSetBits(u32 value)
+    {
+        int count = 0;
+        while(value)
+        {
+            count += (value & 1U);
+            value >>= 1U;
+        }
+        return count;
+    }
+
+    // Returns -1 if no bit is set
+    static int getLeastSignificantBitSetPosition(u32 value)
+    {
+        for(u32 i = 0; i < sizeof(u32); ++i)
+        {
+            if(value & 1U)
+                return i;
+            value >>= 1U;
+        }
+        return -1;
+    }
+
     bool containsPlatform(const std::vector<Platform> &platforms, Platform platform)
     {
         for (Platform vecPlatform : platforms)
@@ -33,7 +57,7 @@ namespace sibs
             case PLATFORM_HAIKU:        return "haiku";
             case PLATFORM_HAIKU32:      return "haiku32";
             case PLATFORM_HAIKU64:      return "haiku64";
-            default:                    return nullptr;
+            default:                    assert(false); return nullptr;
         }
     }
 
@@ -49,4 +73,16 @@ namespace sibs
     {
         return a & b;
     }
+
+    bool isBaseForPlatform(Platform base, Platform platform)
+    {
+        return base == PLATFORM_ANY || base == platform || (isSamePlatformFamily(platform, base) && countSetBits(base) < countSetBits(platform));
+    }
+
+    Platform getPlatformGenericType(Platform platform)
+    {
+        if(platform == PLATFORM_INVALID || platform == PLATFORM_ANY)
+            return PLATFORM_INVALID;
+        return (Platform)(1U << (u32)getLeastSignificantBitSetPosition(platform));
+    }
 }
-- 
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