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-rw-r--r--gerber/utils.py54
1 files changed, 51 insertions, 3 deletions
diff --git a/gerber/utils.py b/gerber/utils.py
index 02a8a14..00b821b 100644
--- a/gerber/utils.py
+++ b/gerber/utils.py
@@ -1,5 +1,19 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
+
+# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
+
+# 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.
"""
gerber.utils
============
@@ -9,8 +23,6 @@ This module provides utility functions for working with Gerber and Excellon
files.
"""
-# Author: Hamilton Kibbe <ham@hamiltonkib.be>
-# License: MIT
def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
""" Convert gerber/excellon formatted string to floating-point number
@@ -54,6 +66,7 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
raise ValueError('Parser only supports precision up to 6:7 format')
# Remove extraneous information
+ value = value.strip()
value = value.strip(' +')
negative = '-' in value
if negative:
@@ -67,7 +80,8 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
offset = 0 if zero_suppression == 'trailing' else (MAX_DIGITS - len(value))
for i, digit in enumerate(value):
digits[i + offset] = digit
-
+
+
result = float(''.join(digits[:integer_digits] + ['.'] + digits[integer_digits:]))
return -1.0 * result if negative else result
@@ -128,3 +142,37 @@ def write_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
return ''.join(digits) if not negative else ''.join(['-'] + digits)
+
+
+def decimal_string(value, precision=6):
+ """ Convert float to string with limited precision
+
+ Parameters
+ ----------
+ value : float
+ A floating point value.
+
+ precision :
+ Maximum number of decimal places to print
+
+ Returns
+ -------
+ value : string
+ The specified value as a string.
+
+ """
+ floatstr = '%0.20g' % value
+ integer = None
+ decimal = None
+ if '.' in floatstr:
+ integer, decimal = floatstr.split('.')
+ elif ',' in floatstr:
+ integer, decimal = floatstr.split(',')
+ if len(decimal) > precision:
+ decimal = decimal[:precision]
+ if integer or decimal:
+ return ''.join([integer, '.', decimal])
+ else:
+ return int(floatstr)
+
+