utils.py: add var_in_numeric_range()

Add a function returning a value based on whether a
bitbake variable is in a numeric range.

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/bb/utils.py b/lib/bb/utils.py
index ebee65d3d..9c09fe66e 100644
--- a/lib/bb/utils.py
+++ b/lib/bb/utils.py
@@ -1812,6 +1812,17 @@ def is_local_uid(uid=''):
                 return True
     return False
 
+def var_in_numeric_range(d, var, first=1, last=0, truevalue="", falsevalue=""):
+    """
+    Return a value depending on whether a bitbake variable is in a numeric
+    range.  Conventionally, 0 as the end of the range matches all values.
+    """
+    try:
+        v = int(d.getVar(var))
+    except:
+        return falsevalue
+    return truevalue if v >= first and (v <= last or last == 0) else falsevalue
+
 def mkstemp(suffix=None, prefix=None, dir=None, text=False):
     """
     Generates a unique filename, independent of time.