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# strfile.py -- write an index file for a fortune file, as the strfile(8)
# program in the BSD-games package does
#
# Copyright (c) 2010, Andrew M. Kuchling
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import struct, string, sys
if len(sys.argv)==1:
print "Usage: strfile.py <filename>"
sys.exit()
# C long variables are different sizes on 32-bit and 64-bit machines,
# so we have to measure how big they are on the machine where this is running.
LONG_SIZE = struct.calcsize('L')
is_64_bit = (LONG_SIZE == 8)
delimiter = '%' # The standard delimiter
filename = sys.argv[1]
input = open(filename, 'r')
output = open(filename + '.dat', 'w')
output.seek(LONG_SIZE * 6) # Skip over the header for now
# Output a 32- or 64-bit integer
def write_long(x):
if is_64_bit:
output.write( struct.pack("!LL", x & 0xffffFFFFL, x >> 32) )
else:
output.write( struct.pack("!L", x) )
write_long(0) # Write the first pointer
# We need to track various statistics: the longest and shortest
# quotations, and their number
shortest = sys.maxint ; longest = 0
numstr = 0
quotation = ""
while (1):
L=input.readline() # Get a line
if L=="": break # Check for end-of-file
if string.strip(L) != delimiter:
# We haven't come to the end yet, so we just add the line to
# the quotation we're building and continue
quotation = quotation + L ; continue
# If there's a leading % in the file, the first quotation will be
# empty; we'll just ignore it
if quotation == "": continue
# Update the shortest and longest variables
shortest = min(shortest, len(quotation) )
longest = max(longest, len(quotation) )
# Output the current file pointer
write_long( input.tell() )
numstr = numstr + 1
quotation = "" # Reset the quotation to null
# To simplify the programming, we'll assume there's a trailing % line
# in the file, with no quotation following.
assert quotation == ""
input.close()
# We're done, so rewind to the beginning of the file and write the header
output.seek(0)
write_long( 1 ) # Version
write_long(numstr) # Number of strings
write_long(longest) # Longest string length
write_long(shortest) # Shortest string length
write_long(0) # Flags; we'll set them to zero
output.write(delimiter + '\0'*(LONG_SIZE-1))
output.close()
print '''"%s.dat" created
There were %i strings
Longest string: %i bytes
Shortest string: %i bytes''' % (filename, numstr, longest, shortest)
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