Provided by: nbdkit-plugin-dev_1.42.2-1ubuntu1_amd64 bug

NAME
       nbdkit_parse_probability - parse probabilities for nbdkit


SYNOPSIS
        #include <nbdkit-plugin.h>

        int nbdkit_parse_probability (const char *what, const char *str,
                                      double *ret);


DESCRIPTION
       Use the "nbdkit_parse_probability" utility function to parse probabilities.  Common formats understood
       include: "0.1", "1e-1", "10%", "1:10" or "1/10", which all mean a probability of 1 in 10.

       The "what" parameter is printed in error messages to provide context.  The "str" parameter is the
       probability string.


RETURN VALUE
       On success the function returns 0 and sets *ret.  The probability is always a finite number ≥ 0.0, but
       note the result may be larger than 1.0 (for example if "str == "200%"" then the function will set
       "*ret = 2.0").  If you want to clamp the upper bound the caller must do that.

       On error, nbdkit_error(3) is called and -1 is returned.


LANGUAGE BINDINGS
       In nbdkit-ocaml-plugin(3):

        NBDKit.parse_probability : string -> string -> float

       In nbdkit-python-plugin(3):

        import nbdkit
        size = nbdkit.parse_probability(what, str)

       In nbdkit-rust-plugin(3):

        use nbdkit::*;
        pub fn parse_probability(what: &str, s: &str) -> Result<f64>


HISTORY
       "nbdkit_parse_probability" was added in nbdkit 1.36.


SEE ALSO
       nbdkit(1), nbdkit_parse_bool(3), nbdkit_parse_delay(3), nbdkit_parse_int(3), nbdkit_parse_size(3),
       nbdkit-plugin(3), nbdkit-filter(3), nbdkit-error-filter(1), nbdkit-evil-filter(1).


AUTHORS
       Richard W.M. Jones


COPYRIGHT
       Copyright Red Hat


LICENSE
       Redistribution and use in source and binary forms, with or without modification, are permitted provided
       that the following conditions are met:

       •   Redistributions  of  source  code must retain the above copyright notice, this list of conditions and
           the following disclaimer.

       •   Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
           the following disclaimer in the documentation and/or other materials provided with the distribution.

       •   Neither the name of Red Hat nor the names of its contributors may  be  used  to  endorse  or  promote
           products derived from this software without specific prior written permission.

       THIS  SOFTWARE  IS  PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
       INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND  FITNESS  FOR  A  PARTICULAR
       PURPOSE  ARE  DISCLAIMED.  IN  NO EVENT SHALL RED HAT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
       INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,  PROCUREMENT  OF
       SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
       ON  ANY  THEORY  OF  LIABILITY,  WHETHER  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
       OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
       DAMAGE.

nbdkit-1.42.2                                      2025-04-02                        nbdkit_parse_probability(3)