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Diffstat (limited to 'ipl/procs/unsigned.icn')
| -rw-r--r-- | ipl/procs/unsigned.icn | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/ipl/procs/unsigned.icn b/ipl/procs/unsigned.icn new file mode 100644 index 0000000..6cf77af --- /dev/null +++ b/ipl/procs/unsigned.icn @@ -0,0 +1,43 @@ +############################################################################ +# +# File: unsigned.icn +# +# Subject: Procedure to put bits unsigned integer +# +# Author: Robert J. Alexander +# +# Date: April 2, 1990 +# +############################################################################ +# +# This file is in the public domain. +# +############################################################################ +# +# unsigned() -- Puts raw bits of characters of string s into an +# integer. The value is taken as unsigned. +# +# If large integers are supported, this routine will work for integers +# of arbitrary size. +# +# If large integers are not supported, the following are true: +# +# If the size of s is the same as or greater than the size of an +# integer in the Icon implementation, the result will be negative or +# positive depending on the value of the integer's sign bit. +# +# 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. +# +# This procedure is normally used for processing of binary data read +# from a file. +# + +procedure unsigned(s) + local i + i := 0 + every i := ior(ord(!s),ishift(i,8)) + return i +end |