Initial Contributionv1.0

1 files changed, 127 insertions, 0 deletions

diff --git a/webapp/django/db/backends/util.py b/webapp/django/db/backends/util.py
new file mode 100644
index 0000000000..7228b4046b
--- /dev/null
+++ b/webapp/django/db/backends/util.py
@@ -0,0 +1,127 @@
+import datetime
+from time import time
+
+from django.utils.hashcompat import md5_constructor
+
+try:
+    import decimal
+except ImportError:
+    from django.utils import _decimal as decimal    # for Python 2.3
+
+class CursorDebugWrapper(object):
+    def __init__(self, cursor, db):
+        self.cursor = cursor
+        self.db = db # Instance of a BaseDatabaseWrapper subclass
+
+    def execute(self, sql, params=()):
+        start = time()
+        try:
+            return self.cursor.execute(sql, params)
+        finally:
+            stop = time()
+            sql = self.db.ops.last_executed_query(self.cursor, sql, params)
+            self.db.queries.append({
+                'sql': sql,
+                'time': "%.3f" % (stop - start),
+            })
+
+    def executemany(self, sql, param_list):
+        start = time()
+        try:
+            return self.cursor.executemany(sql, param_list)
+        finally:
+            stop = time()
+            self.db.queries.append({
+                'sql': '%s times: %s' % (len(param_list), sql),
+                'time': "%.3f" % (stop - start),
+            })
+
+    def __getattr__(self, attr):
+        if attr in self.__dict__:
+            return self.__dict__[attr]
+        else:
+            return getattr(self.cursor, attr)
+
+    def __iter__(self):
+        return iter(self.cursor)
+
+###############################################
+# Converters from database (string) to Python #
+###############################################
+
+def typecast_date(s):
+    return s and datetime.date(*map(int, s.split('-'))) or None # returns None if s is null
+
+def typecast_time(s): # does NOT store time zone information
+    if not s: return None
+    hour, minutes, seconds = s.split(':')
+    if '.' in seconds: # check whether seconds have a fractional part
+        seconds, microseconds = seconds.split('.')
+    else:
+        microseconds = '0'
+    return datetime.time(int(hour), int(minutes), int(seconds), int(float('.'+microseconds) * 1000000))
+
+def typecast_timestamp(s): # does NOT store time zone information
+    # "2005-07-29 15:48:00.590358-05"
+    # "2005-07-29 09:56:00-05"
+    if not s: return None
+    if not ' ' in s: return typecast_date(s)
+    d, t = s.split()
+    # Extract timezone information, if it exists. Currently we just throw
+    # it away, but in the future we may make use of it.
+    if '-' in t:
+        t, tz = t.split('-', 1)
+        tz = '-' + tz
+    elif '+' in t:
+        t, tz = t.split('+', 1)
+        tz = '+' + tz
+    else:
+        tz = ''
+    dates = d.split('-')
+    times = t.split(':')
+    seconds = times[2]
+    if '.' in seconds: # check whether seconds have a fractional part
+        seconds, microseconds = seconds.split('.')
+    else:
+        microseconds = '0'
+    return datetime.datetime(int(dates[0]), int(dates[1]), int(dates[2]),
+        int(times[0]), int(times[1]), int(seconds), int(float('.'+microseconds) * 1000000))
+
+def typecast_boolean(s):
+    if s is None: return None
+    if not s: return False
+    return str(s)[0].lower() == 't'
+
+def typecast_decimal(s):
+    if s is None or s == '':
+        return None
+    return decimal.Decimal(s)
+
+###############################################
+# Converters from Python to database (string) #
+###############################################
+
+def rev_typecast_boolean(obj, d):
+    return obj and '1' or '0'
+
+def rev_typecast_decimal(d):
+    if d is None:
+        return None
+    return str(d)
+
+def truncate_name(name, length=None):
+    """Shortens a string to a repeatable mangled version with the given length.
+    """
+    if length is None or len(name) <= length:
+        return name
+
+    hash = md5_constructor(name).hexdigest()[:4]
+
+    return '%s%s' % (name[:length-4], hash)
+
+def format_number(value, max_digits, decimal_places):
+    """
+    Formats a number into a string with the requisite number of digits and
+    decimal places.
+    """
+    return u"%.*f" % (decimal_places, value)