Merge pull request #2611 from tshinnic/svglib_parser_real_number_format

Handle one more valid real number format in svgLib parse_path()

Lib/fontTools/svgLib/path/parser.py

@@ -16,10 +16,13 @@ ARC_COMMANDS = set("Aa")
 UPPERCASE = set('MZLHVCSQTA')
 
 COMMAND_RE = re.compile("([MmZzLlHhVvCcSsQqTtAa])")
+
+# https://www.w3.org/TR/css-syntax-3/#number-token-diagram
+#   but -6.e-5 will be tokenized as "-6" then "-5" and confuse parsing
 FLOAT_RE = re.compile(
     r"[-+]?"  # optional sign
     r"(?:"
-    r"(?:0|[1-9][0-9]*)(?:\.[0-9]+(?:[eE][-+]?[0-9]+)?)?"  # int/float
+    r"(?:0|[1-9][0-9]*)(?:\.[0-9]+)?(?:[eE][-+]?[0-9]+)?"  # int/float
     r"|"
     r"(?:\.[0-9]+(?:[eE][-+]?[0-9]+)?)"  # float with leading dot (e.g. '.42')
     r")"

Tests/svgLib/path/parser_test.py

@@ -280,6 +280,15 @@ def test_exponents():
 
     assert pen.value == expected
 
+    pen = RecordingPen()
+    parse_path("M-3e38 3E+38L-3E-38,3e-38", pen)
+    expected = [
+        ("moveTo", ((-3e+38, 3e+38),)),
+        ("lineTo", ((-3e-38, 3e-38),)),
+        ("endPath", ()),
+    ]
+
+    assert pen.value == expected
 
 def test_invalid_implicit_command():
     with pytest.raises(ValueError) as exc_info: