NAME

       nbdkit_parse_int, nbdkit_parse_unsigned, nbdkit_parse_int8_t, nbdkit_parse_int16_t,
       nbdkit_parse_int32_t, nbdkit_parse_int64_t, nbdkit_parse_uint8_t, nbdkit_parse_uint16_t,
       nbdkit_parse_uint32_t, nbdkit_parse_uint64_t - parse numbers for nbdkit

SYNOPSIS

        #include <nbdkit-plugin.h>

        int nbdkit_parse_int (const char *what, const char *str, int *r);
        int nbdkit_parse_unsigned (const char *what,
                                   const char *str, unsigned *r);
        int nbdkit_parse_int8_t (const char *what,
                                 const char *str, int8_t *r);
        int nbdkit_parse_uint8_t (const char *what,
                                  const char *str, uint8_t *r);
        int nbdkit_parse_int16_t (const char *what,
                                  const char *str, int16_t *r);
        int nbdkit_parse_uint16_t (const char *what,
                                   const char *str, uint16_t *r);
        int nbdkit_parse_int32_t (const char *what,
                                  const char *str, int32_t *r);
        int nbdkit_parse_uint32_t (const char *what,
                                   const char *str, uint32_t *r);
        int nbdkit_parse_int64_t (const char *what,
                                  const char *str, int64_t *r);
        int nbdkit_parse_uint64_t (const char *what,
                                   const char *str, uint64_t *r);

DESCRIPTION

       Parse string "str" into an integer of various types.  These functions parse a decimal,
       hexadecimal ("0x...") or octal ("0...") number.

       These functions deal correctly with overflow, out of range and parse errors, and you
       should use them instead of unsafe functions like sscanf(3), atoi(3) and similar.

       The "what" parameter is printed in error messages to provide context.  It should usually
       be a short descriptive string of what you are trying to parse, eg:

        if (nbdkit_parse_int ("random seed", value, &seed) == -1)
          return -1;

       might print an error:

        random seed: could not parse number: "lalala"

RETURN VALUE

       On success the functions return 0 and set *r to the parsed value (unless "*r == NULL" in
       which case the result is discarded).

       On error, nbdkit_error(3) is called and the functions return -1.  On error *r is always
       unchanged.

HISTORY

       "nbdkit_parse_int" and the others were added in nbdkit 1.16.

SEE ALSO

       nbdkit(1), nbdkit_parse_bool(3), nbdkit_parse_delay(3), nbdkit_parse_probability(3),
       nbdkit_parse_size(3), nbdkit-plugin(3), nbdkit-filter(3).

AUTHORS

       Richard W.M. Jones

COPYRIGHT

       Copyright Red Hat

LICENSE

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       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
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       •   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
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