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/*

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 * error handling

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 */

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// perror + exit

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void die (const char *msg);

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// fprintf + newline

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void error (const char *fmt, ...);

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// fprintf + strerror + newline

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void perr (const char *fmt, ...);

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// fprintf + strerror + newline + exit

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void perr_exit (const char *fmt, ...);

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// fprintf + newline + exit

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void err_exit (const char *fmt, ...);

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/*

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 * Parse a host:port string.

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 *

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 * Valid formats:

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 *  host

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 *  host:port

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 *  [host]

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 *  [host]:port

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 *

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 * The contents of the given hostport string *will* be modified.

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 *

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 * The value of *port will be set to NULL if no port was given.

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 *

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 * Returns 0 and sets *host if succesfull, nonzero otherwise.

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 *

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 */

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int parse_hostport (char *hostport, char **host, char **port);

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