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############################################################################
#
# File: bincvt.icn
#
# Subject: Procedures to convert binary data
#
# Author: Robert J. Alexander
#
# Date: October 16, 1996
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# unsigned() -- Converts binary byte string into unsigned integer.
# Detects overflow if number is too large.
#
# This procedure is normally used for processing of binary data
# read from a file.
#
# raw() -- Puts raw bits of characters of string s into an integer. If
# the size of s is less than the size of an integer, the bytes are put
# into the low order part of the integer, with the remaining high order
# bytes filled with zero. If the string is too large, the most
# significant bytes will be lost -- no overflow detection.
#
# This procedure is normally used for processing of binary data
# read from a file.
#
# rawstring() -- Creates a string consisting of the raw bits in the low
# order "size" bytes of integer i.
#
# This procedure is normally used for processing of binary data
# to be written to a file.
#
############################################################################
procedure unsigned(s)
local i
i := 0
every i := ord(!s) + i * 256
return i
end
procedure raw(s)
local i
i := 0
every i := ior(ord(!s),ishift(i,8))
return i
end
procedure rawstring(i,size)
local s
s := ""
every 1 to size do {
s := char(iand(i,16rFF)) || s
i := ishift(i,-8)
}
return s
end
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