Import Mbed OS hard-float snapshot

tools/psa/tfm/bin_utils/imgtool_lib/version.py

@@ -0,0 +1,66 @@
+# Copyright 2017 Linaro Limited
+# Copyright (c) 2018, Arm Limited.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Semi Semantic Versioning
+
+Implements a subset of semantic versioning that is supportable by the image header.
+"""
+
+import argparse
+from collections import namedtuple
+import re
+
+SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision', 'build'])
+
+def increment_build_num(lastVer):
+    newVer = SemiSemVersion(lastVer.major, lastVer.minor, lastVer.revision, lastVer.build + 1)
+    return newVer
+
+# -1 if a is older than b; 0 if they're the same version; 1 if a is newer than b
+def compare(a, b):
+    if (a.major > b.major): return 1
+    elif (a.major < b.major): return -1
+    else:
+        if (a.minor > b.minor): return 1
+        elif (a.minor < b.minor): return -1
+        else:
+            if (a.revision > b.revision): return 1
+            elif (a.revision < b.revision): return -1
+            else:
+                if (a.build > b.build): return 1
+                elif (a.build < b.build): return -1
+                else: return 0
+
+version_re = re.compile(r"""^([1-9]\d*|0)(\.([1-9]\d*|0)(\.([1-9]\d*|0)(\+([1-9]\d*|0))?)?)?$""")
+def decode_version(text):
+    """Decode the version string, which should be of the form maj.min.rev+build"""
+    m = version_re.match(text)
+    if m:
+        result = SemiSemVersion(
+                int(m.group(1)) if m.group(1) else 0,
+                int(m.group(3)) if m.group(3) else 0,
+                int(m.group(5)) if m.group(5) else 0,
+                int(m.group(7)) if m.group(7) else 0)
+        return result
+    else:
+        msg = "Invalid version number, should be maj.min.rev+build with later parts optional"
+        raise argparse.ArgumentTypeError(msg)
+
+if __name__ == '__main__':
+    print(decode_version("1.2"))
+    print(decode_version("1.0"))
+    print(decode_version("0.0.2+75"))
+    print(decode_version("0.0.0+00"))