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    SubjectRe: [PATCH -perf/perf/core v2 1/3] perf: Add strfilter for general purpose string filter
    (2011/01/20 23:15), Masami Hiramatsu wrote:
    > Add strfilter for general purpose string filter.
    > Every filter rules are descrived by glob matching pattern
    > and '!' prefix which means Logical NOT.
    > A strfilter consists of those filter rules connected
    > with '&' and '|'. A set of rules can be folded by using
    > '(' and ')'. It also accepts spaces around rules and those
    > operators.
    >
    > Format:
    > <rule> ::= <glob-exp> | "!" <rule> | <rule> <op> <rule> | "(" <rule> ")"
    > <op> ::= "&" | "|"
    >
    > e.g.
    > "(add* | del*) & *timer" filter rules pass strings which
    > start with add or del and end with timer.
    >
    > This will be used by perf probe --filter.
    >
    > Changes in V2:
    > - Fix to check result of strdup() and strfilter__alloc().
    > - Encapsulate and simplify interfaces as like as regex(3).

    Hi Arnaldo,
    Finally, I decided not to support partial node deletion, because
    it's hard to modify a part of rule tree. Instead, I encapsulated
    each node and simplified interfaces.

    Thank you,

    --
    Masami HIRAMATSU
    2nd Dept. Linux Technology Center
    Hitachi, Ltd., Systems Development Laboratory
    E-mail: masami.hiramatsu.pt@hitachi.com


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