[gnue] r9357 - trunk/gnue-common/src/utils

[johannes]

Author: johannes
Date: 2007-02-08 08:19:54 -0600 (Thu, 08 Feb 2007)
New Revision: 9357

Added:
   trunk/gnue-common/src/utils/xlocale.py
Modified:
   trunk/gnue-common/src/utils/datatypes.py
Log:
Added new module containing stuff which is missing in locale module


Modified: trunk/gnue-common/src/utils/datatypes.py
===================================================================
--- trunk/gnue-common/src/utils/datatypes.py    2007-02-06 22:25:44 UTC (rev 
9356)
+++ trunk/gnue-common/src/utils/datatypes.py    2007-02-08 14:19:54 UTC (rev 
9357)
@@ -19,7 +19,7 @@
 # write to the Free Software Foundation, Inc., 59 Temple Place
 # - Suite 330, Boston, MA 02111-1307, USA.
 #
-# $Id: version.py 9059 2006-11-23 10:17:50Z reinhard $
+# $Id$
 """
 Helper functions for datatype conversion.
 """


Property changes on: trunk/gnue-common/src/utils/datatypes.py
___________________________________________________________________
Name: svn:keywords
   + Id

Added: trunk/gnue-common/src/utils/xlocale.py
===================================================================
--- trunk/gnue-common/src/utils/xlocale.py      2007-02-06 22:25:44 UTC (rev 
9356)
+++ trunk/gnue-common/src/utils/xlocale.py      2007-02-08 14:19:54 UTC (rev 
9357)
@@ -0,0 +1,151 @@
+# GNU Enterprise Common Library - Utilities - locale extensions
+#
+# Copyright 2001-2007 Free Software Foundation
+#
+# This file is part of GNU Enterprise
+#
+# GNU Enterprise is free software; you can redistribute it
+# and/or modify it under the terms of the GNU General Public
+# License as published by the Free Software Foundation; either
+# version 2, or (at your option) any later version.
+#
+# GNU Enterprise is distributed in the hope that it will be
+# useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+# PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public
+# License along with program; see the file COPYING. If not,
+# write to the Free Software Foundation, Inc., 59 Temple Place
+# - Suite 330, Boston, MA 02111-1307, USA.
+#
+# $Id$
+"""
+Helper functions which we think are missing in python's locale module.
+"""
+
+import locale
+import re
+
+__all__ = ['format_numeric']
+
+# =============================================================================
+# Format a numeric value according to LC_NUMERIC or the given pattern
+# =============================================================================
+
+def format_numeric(fmt_string, value, pattern=None):
+    """
+    Format a numeric value using a conversion specifier (fmt_string) and apply
+    grouping (thousands separating, decimal point) according to a given pattern
+    or as defined by the current locale.
+
+    The grouping-pattern used for thousands separating and definition of the
+    decimal point.  The format of this string is <thousand-separator><number of
+    digits><decimal separator> where the pair <thousand-separator><number of
+    digits> can be repeated.
+
+    Examples: assume a call of format_numeric('%.2f', 1234567.89, pat) with
+      pat =   ',3.'   result is 1,234,567.89
+      pat = ',3.3,'   result is 1,234.567,89
+      pat = '#2.1;'   result is 1#23.4#56.7;89
+
+    In the last example you can see that the grouping pattern will be repeated
+    as a whole.
+
+    @param fmt_string: conversion specifier as used by pythons string
+        formatting, i.e. %.2f or %d
+    @param value: numeric value to be formatted.  This value will be converted
+        using @L{fmt_string} and that result get's processed according to
+        either the grouping-pattern or the locales default.
+    @param pattern: the grouping-pattern used for thousands separating and
+        definition of the decimal point.  If no pattern is given (None),
+        thousands separating and decimal point replacement is done by the
+        locale.
+
+    @returns: a formatted string according to the given conversion specifier as
+        well as thousands-separating and decimal point replacement as defined
+        by the pattern or locale.
+    """
+
+    # If we don't have a pattern for grouping we pass the job back to the
+    # locales format method.
+    if pattern is None:
+        result = locale.format(fmt_string, value, True)
+    else:
+        # Catch the decimal separator
+        dec_sep = pattern[-1]
+        pattern = pattern[:-1]
+
+        # Break the given pattern into separator groups 
+        pat = re.compile('.*?(\D+)(\d+)$')
+        match = pat.match(pattern)
+        groups = []
+        while match:
+            sep, offs = match.groups()
+            groups.append((sep, int(offs)))
+            off = len(sep) + len(offs)
+            pattern = pattern[:-off]
+            match = pat.match(pattern)
+
+        # Build the raw string according to the conversion string
+        result = fmt_string % value
+
+        # Store the sign
+        if result[0].isdigit():
+            sign = ''
+        else:
+            sign = result[0]
+            result = result[1:]
+
+        # Take away the fractional part since it is not needed for grouping
+        match = re.match('(.*?)\.(\d*)$', result)
+        if match:
+            result, fractional = match.groups()
+            fractional = dec_sep + fractional
+        else:
+            fractional = ''
+
+        # Now perform the grouping from right to left
+        if groups:
+            rest = result
+            result = ''
+
+            while rest:
+                for (sep, pos) in groups:
+                    if len(rest) <= pos:
+                        result = rest + result
+                        rest = ''
+                        break
+
+                    result = sep + rest[-pos:] + result
+                    rest = rest[:-pos]
+
+        # And finally stick all parts together again
+        result = sign + result + fractional
+
+    return result
+
+
+# =============================================================================
+# Modules self test code
+# =============================================================================
+
+if __name__ == '__main__':
+
+    locale.setlocale(locale.LC_ALL, '')
+
+    def check(fmt, val, group=None):
+        """ show and run a test for format_numeric() """
+        print "Fmt: %s Group: %s Value: %s = %s" % \
+                (fmt, group, val, format_numeric(fmt, val, group))
+
+    val1 = 1234567891234567.236
+    check('%.2f', val1)
+    check('%.2f', val1, ',4.3,')
+    check('%.2f', val1, ',3.3,')
+    check('%.3f', 12, ',3.3,')
+    check('%.4f', 1234.52, 'x2;')
+    check('%d', 1234, ',3.')
+    check('%.2f', 1234567.89, ',3.')
+    check('%.2f', 1234567.89, ',3.3,')
+    check('%.2f', 1234567.89, '#2.1;')


Property changes on: trunk/gnue-common/src/utils/xlocale.py
___________________________________________________________________
Name: svn:keywords
   + Id