From 564160e126f525dda52f27044d29b479088da191 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 19 Dec 2022 21:12:29 +0200
Subject: [PATCH] Improve architecture name matching

It will now treat x86_64 as a more specific match than just x86.
---
 source/architecture.cpp | 29 +++++++++++++++--------------
 source/architecture.h   |  2 +-
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/source/architecture.cpp b/source/architecture.cpp
index 2efcd5e..48c6a20 100644
--- a/source/architecture.cpp
+++ b/source/architecture.cpp
@@ -177,7 +177,7 @@ Architecture::Architecture(Builder &b, const string &spec):
 	}
 }
 
-bool Architecture::match_name(const string &pattern) const
+bool Architecture::match_name(const string &pattern, unsigned *quality) const
 {
 	bool negate = (pattern[0]=='!');
 	vector<string> parts = split(pattern.substr(negate), "-");
@@ -187,31 +187,32 @@ bool Architecture::match_name(const string &pattern) const
 		if((p=="32" && bits==32) || (p=="64" && bits==64))
 			;
 		else if(p!=type && p!=cpu && p!=fpu && p!=system && p!=toolchain)
+		{
+			if(quality)
+				*quality = 0;
 			return negate;
+		}
 	}
+
+	if(quality)
+		*quality = parts.size();
 	return !negate;
 }
 
 string Architecture::best_match(const vector<string> &names) const
 {
 	string best;
-	unsigned best_size = 0;
+	unsigned best_quality = 0;
 	for(const string &n: names)
-		if(match_name(n))
-		{
-			/* TODO Do full parse and alias resolution here?  Otherwise x86 and
-			x86_64 are treated as equally good, even though the latter is more
-			specific. */
-			unsigned size = 1;
-			for(char c: n)
-				size += (c=='-');
-
-			if(size>best_size)
+	{
+		unsigned quality;
+		if(match_name(n, &quality))
+			if(quality>best_quality)
 			{
 				best = n;
-				best_size = size;
+				best_quality = quality;
 			}
-		}
+	}
 
 	return best;
 }
diff --git a/source/architecture.h b/source/architecture.h
index 7f3c4b2..776de85 100644
--- a/source/architecture.h
+++ b/source/architecture.h
@@ -44,7 +44,7 @@ public:
 	const std::string &get_cpu() const { return cpu; }
 	const std::string &get_fpu() const { return fpu; }
 	const std::string &get_toolchain() const { return toolchain; }
-	bool match_name(const std::string &) const;
+	bool match_name(const std::string &, unsigned * = 0) const;
 	std::string best_match(const std::vector<std::string> &) const;
 	bool is_native() const { return native; }
 	bool is_cross() const { return !cross_prefix.empty(); }
-- 
2.43.0