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-rw-r--r--lang/python/wiredtiger/packing.py234
1 files changed, 117 insertions, 117 deletions
diff --git a/lang/python/wiredtiger/packing.py b/lang/python/wiredtiger/packing.py
index 3ad4623e2f1..6bcb82e76d5 100644
--- a/lang/python/wiredtiger/packing.py
+++ b/lang/python/wiredtiger/packing.py
@@ -30,124 +30,124 @@
from intpacking import pack_int, unpack_int
def __get_type(fmt):
- if not fmt:
- return None, fmt
- # Variable-sized encoding is the default (and only supported format in v1)
- if fmt[0] in '.@<>':
- tfmt = fmt[0]
- fmt = fmt[1:]
- else:
- tfmt = '.'
- return tfmt, fmt
+ if not fmt:
+ return None, fmt
+ # Variable-sized encoding is the default (and only supported format in v1)
+ if fmt[0] in '.@<>':
+ tfmt = fmt[0]
+ fmt = fmt[1:]
+ else:
+ tfmt = '.'
+ return tfmt, fmt
def unpack(fmt, s):
- tfmt, fmt = __get_type(fmt)
- if not fmt:
- return ()
- if tfmt != '.':
- raise ValueError('Only variable-length encoding is currently supported')
- result = []
- havesize = size = 0
- for offset, f in enumerate(fmt):
- if f.isdigit():
- size = (size * 10) + int(f)
- havesize = 1
- continue
- elif f == 'x':
- if not havesize:
- size = 1
- s = s[size:]
- # Note: no value, don't increment i
- elif f in 'Ssu':
- if not havesize:
- if f == 's':
- size = 1
- elif f == 'S':
- size = s.find('\0')
- elif f == 'u':
- if offset == len(fmt) - 1:
- size = len(s)
- else:
- size, s = unpack_int(s)
- result.append(s[:size])
- if f == 'S' and not havesize:
- size += 1
- s = s[size:]
- elif f in 't':
- # bit type, size is number of bits
- if not havesize:
- size = 1
- result.append(ord(s[0:1]))
- s = s[1:]
- else:
- # integral type
- if not havesize:
- size = 1
- for j in xrange(size):
- v, s = unpack_int(s)
- result.append(v)
- havesize = size = 0
- return result
+ tfmt, fmt = __get_type(fmt)
+ if not fmt:
+ return ()
+ if tfmt != '.':
+ raise ValueError('Only variable-length encoding is currently supported')
+ result = []
+ havesize = size = 0
+ for offset, f in enumerate(fmt):
+ if f.isdigit():
+ size = (size * 10) + int(f)
+ havesize = 1
+ continue
+ elif f == 'x':
+ if not havesize:
+ size = 1
+ s = s[size:]
+ # Note: no value, don't increment i
+ elif f in 'Ssu':
+ if not havesize:
+ if f == 's':
+ size = 1
+ elif f == 'S':
+ size = s.find('\0')
+ elif f == 'u':
+ if offset == len(fmt) - 1:
+ size = len(s)
+ else:
+ size, s = unpack_int(s)
+ result.append(s[:size])
+ if f == 'S' and not havesize:
+ size += 1
+ s = s[size:]
+ elif f in 't':
+ # bit type, size is number of bits
+ if not havesize:
+ size = 1
+ result.append(ord(s[0:1]))
+ s = s[1:]
+ else:
+ # integral type
+ if not havesize:
+ size = 1
+ for j in xrange(size):
+ v, s = unpack_int(s)
+ result.append(v)
+ havesize = size = 0
+ return result
def pack(fmt, *values):
- tfmt, fmt = __get_type(fmt)
- if not fmt:
- return ()
- if tfmt != '.':
- raise ValueError('Only variable-length encoding is currently supported')
- result = ''
- havesize = i = size = 0
- for offset, f in enumerate(fmt):
- if f.isdigit():
- size = (size * 10) + int(f)
- havesize = 1
- continue
- elif f == 'x':
- if not havesize:
- result += '\0'
- else:
- result += '\0' * size
- # Note: no value, don't increment i
- elif f in 'Ssu':
- val = values[i]
- if f == 'S' and '\0' in val:
- l = val.find('\0')
- else:
- l = len(val)
- if havesize:
- if l > size:
- l = size
- elif f == 's':
- havesize = size = 1
- elif f == 'u' and offset != len(fmt) - 1:
- result += pack_int(l)
- if type(val) is unicode and f in 'Ss':
- result += str(val[:l])
- else:
- result += val[:l]
- if f == 'S' and not havesize:
- result += '\0'
- elif size > l:
- result += '\0' * (size - l)
- i += 1
- elif f in 't':
- # bit type, size is number of bits
- if not havesize:
- size = 1
- if size > 8:
- raise ValueError("bit count cannot be greater than 8 for 't' encoding")
- mask = (1 << size) - 1
- val = values[i]
- if (mask & val) != val:
- raise ValueError("value out of range for 't' encoding")
- result += chr(val)
- i += 1
- else:
- # integral type
- if not havesize:
- size = 1
- for j in xrange(size):
- result += pack_int(values[i])
- i += 1
- havesize = size = 0
- return result
+ tfmt, fmt = __get_type(fmt)
+ if not fmt:
+ return ()
+ if tfmt != '.':
+ raise ValueError('Only variable-length encoding is currently supported')
+ result = ''
+ havesize = i = size = 0
+ for offset, f in enumerate(fmt):
+ if f.isdigit():
+ size = (size * 10) + int(f)
+ havesize = 1
+ continue
+ elif f == 'x':
+ if not havesize:
+ result += '\0'
+ else:
+ result += '\0' * size
+ # Note: no value, don't increment i
+ elif f in 'Ssu':
+ val = values[i]
+ if f == 'S' and '\0' in val:
+ l = val.find('\0')
+ else:
+ l = len(val)
+ if havesize:
+ if l > size:
+ l = size
+ elif f == 's':
+ havesize = size = 1
+ elif f == 'u' and offset != len(fmt) - 1:
+ result += pack_int(l)
+ if type(val) is unicode and f in 'Ss':
+ result += str(val[:l])
+ else:
+ result += val[:l]
+ if f == 'S' and not havesize:
+ result += '\0'
+ elif size > l:
+ result += '\0' * (size - l)
+ i += 1
+ elif f in 't':
+ # bit type, size is number of bits
+ if not havesize:
+ size = 1
+ if size > 8:
+ raise ValueError("bit count cannot be greater than 8 for 't' encoding")
+ mask = (1 << size) - 1
+ val = values[i]
+ if (mask & val) != val:
+ raise ValueError("value out of range for 't' encoding")
+ result += chr(val)
+ i += 1
+ else:
+ # integral type
+ if not havesize:
+ size = 1
+ for j in xrange(size):
+ result += pack_int(values[i])
+ i += 1
+ havesize = size = 0
+ return result
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