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9770787e70
This commit introduces a new category of converters. They are bitwise and arithmetic operators which support performing basic operations on integers. Some bitwise operations are supported (and, or, xor, cpl) and some arithmetic operations are supported (add, sub, mul, div, mod, neg). Some comparators are provided (odd, even, not, bool) which make it possible to report a match without having to write an ACL. The detailed list of new operators as they appear in the doc is : add(<value>) Adds <value> to the input value of type unsigned integer, and returns the result as an unsigned integer. and(<value>) Performs a bitwise "AND" between <value> and the input value of type unsigned integer, and returns the result as an unsigned integer. bool Returns a boolean TRUE if the input value of type unsigned integer is non-null, otherwise returns FALSE. Used in conjunction with and(), it can be used to report true/false for bit testing on input values (eg: verify the presence of a flag). cpl Takes the input value of type unsigned integer, applies a twos-complement (flips all bits) and returns the result as an unsigned integer. div(<value>) Divides the input value of type unsigned integer by <value>, and returns the result as an unsigned integer. If <value> is null, the largest unsigned integer is returned (typically 2^32-1). even Returns a boolean TRUE if the input value of type unsigned integer is even otherwise returns FALSE. It is functionally equivalent to "not,and(1),bool". mod(<value>) Divides the input value of type unsigned integer by <value>, and returns the remainder as an unsigned integer. If <value> is null, then zero is returned. mul(<value>) Multiplies the input value of type unsigned integer by <value>, and returns the product as an unsigned integer. In case of overflow, the higher bits are lost, leading to seemingly strange values. neg Takes the input value of type unsigned integer, computes the opposite value, and returns the remainder as an unsigned integer. 0 is identity. This operator is provided for reversed subtracts : in order to subtract the input from a constant, simply perform a "neg,add(value)". not Returns a boolean FALSE if the input value of type unsigned integer is non-null, otherwise returns TRUE. Used in conjunction with and(), it can be used to report true/false for bit testing on input values (eg: verify the absence of a flag). odd Returns a boolean TRUE if the input value of type unsigned integer is odd otherwise returns FALSE. It is functionally equivalent to "and(1),bool". or(<value>) Performs a bitwise "OR" between <value> and the input value of type unsigned integer, and returns the result as an unsigned integer. sub(<value>) Subtracts <value> from the input value of type unsigned integer, and returns the result as an unsigned integer. Note: in order to subtract the input from a constant, simply perform a "neg,add(value)". xor(<value>) Performs a bitwise "XOR" (exclusive OR) between <value> and the input value of type unsigned integer, and returns the result as an unsigned integer. |
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| .. | ||
| design-thoughts | ||
| internals | ||
| acl.fig | ||
| architecture.txt | ||
| close-options.txt | ||
| coding-style.txt | ||
| configuration.txt | ||
| cookie-options.txt | ||
| gpl.txt | ||
| haproxy-en.txt | ||
| haproxy-fr.txt | ||
| haproxy.1 | ||
| lgpl.txt | ||
| network-namespaces.txt | ||
| proxy-protocol.txt | ||
| queuing.fig | ||