explain_strtoul_or_die − convert string to unsigned long and report errors
#include <libexplain/strtoul.h>
unsigned long explain_strtoul_or_die(const char *nptr, char **endptr, int base);
unsigned long explain_strtoul_on_error(const char *nptr, char **endptr, int base))
The explain_strtoul_or_die function is used to call the strtoul(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_strtoul(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_strtoul_on_error function is used to call the strtoul(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_strtoul(3) function, but still returns to the caller.
nptr |
The nptr, exactly as to be passed to the strtoul(3) system call. |
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endptr |
The endptr, exactly as to be passed to the strtoul(3) system call. |
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base |
The base, exactly as to be passed to the strtoul(3) system call. |
The explain_strtoul_or_die function only returns on success, see strtoul(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_strtoul_on_error function always returns the value return by the wrapped strtoul(3) system call.
The explain_strtoul_or_die function is intended to be used in a fashion similar to the following example:
unsigned long result = explain_strtoul_or_die(nptr, endptr, base);
convert a string to an unsigned long integer
explain strtoul(3) errors
terminate the calling process |
libexplain version 1.4
Copyright (C) 2009 Peter Miller