Add support for parsing semantic and semantic-like versions

1 files changed, 78 insertions, 0 deletions

diff --git a/libbutl/semantic-version.ixx b/libbutl/semantic-version.ixx
new file mode 100644
index 0000000..cd88663
--- /dev/null
+++ b/libbutl/semantic-version.ixx
@@ -0,0 +1,78 @@
+// file      : libbutl/semantic-version.ixx -*- C++ -*-
+// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+namespace butl
+{
+  inline semantic_version::
+  semantic_version (std::uint64_t mj,
+                    std::uint64_t mi,
+                    std::uint64_t p,
+                    std::string   b)
+      : major (mj),
+        minor (mi),
+        patch (p),
+        build (std::move (b))
+  {
+  }
+
+  inline semantic_version::
+  semantic_version (const std::string& s, bool ab)
+      : semantic_version (s, ab ? "-+" : nullptr)
+  {
+  }
+
+  inline semantic_version::
+  semantic_version (const std::string& s, const char* bs)
+      : semantic_version (s, 0, bs)
+  {
+  }
+
+  inline semantic_version::
+  semantic_version (const std::string& s, std::size_t p, bool ab)
+      : semantic_version (s, p, ab ? "-+" : nullptr)
+  {
+  }
+
+  inline int semantic_version::
+  compare (const semantic_version& v, bool ib) const
+  {
+    return (major != v.major ? (major < v.major ? -1 : 1) :
+            minor != v.minor ? (minor < v.minor ? -1 : 1) :
+            patch != v.patch ? (patch < v.patch ? -1 : 1) :
+            ib ? 0 : build.compare (v.build));
+  }
+
+  struct semantic_version_result
+  {
+    optional<semantic_version> version;
+    std::string failure_reason;
+  };
+
+  LIBBUTL_SYMEXPORT semantic_version_result
+  parse_semantic_version_impl (const std::string&, std::size_t, const char*);
+
+  inline optional<semantic_version>
+  parse_semantic_version (const std::string& s, bool ab)
+  {
+    return parse_semantic_version (s, ab ? "-+" : nullptr);
+  }
+
+  inline optional<semantic_version>
+  parse_semantic_version (const std::string& s, const char* bs)
+  {
+    return parse_semantic_version_impl (s, 0, bs).version;
+  }
+
+  inline optional<semantic_version>
+  parse_semantic_version (const std::string& s, std::size_t p, bool ab)
+  {
+    return parse_semantic_version (s, p, ab ? "-+" : nullptr);
+  }
+
+  inline optional<semantic_version>
+  parse_semantic_version (const std::string& s, std::size_t p, const char* bs)
+  {
+    return parse_semantic_version_impl (s, p, bs).version;
+  }
+}