explain_strtold_or_die - convert string to number and report errors
#include <libexplain/strtold.h>
long double explain_strtold_or_die(const char *nptr, char **endptr);
long double explain_strtold_on_error(const char *nptr, char **endptr))
The
explain_strtold_or_die function is used to call the
strtold(3)
system call. On failure an explanation will be printed to
stderr,
obtained from the
explain_strtold(3) function, and then the process
terminates by calling exit(EXIT_FAILURE).
The
explain_strtold_on_error function is used to call the
strtold(3) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_strtold(3) function, but still
returns to the caller.
- nptr
- The nptr, exactly as to be passed to the strtold(3) system
call.
- endptr
- The endptr, exactly as to be passed to the strtold(3) system
call.
The
explain_strtold_or_die function only returns on success, see
strtold(3) for more information. On failure, prints an explanation and
exits, it does not return.
The
explain_strtold_on_error function always returns the value return by
the wrapped
strtold(3) system call.
The
explain_strtold_or_die function is intended to be used in a fashion
similar to the following example:
long double result = explain_strtold_or_die(nptr, endptr);
- strtold(3)
- convert ASCII string to floating‐point number
- explain_strtold(3)
- explain strtold(3) errors
- exit(2)
- terminate the calling process
libexplain version 1.3
Copyright (C) 2009 Peter Miller