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buffer_get_new_token_sa_pred(3)             DragonFly Library Functions Manual

NAME
       buffer_get_new_token_sa_pred - read token from buffer

SYNTAX
       #include <stralloc.h>
       #include <buffer.h>

       int buffer_get_new_token_sa_pred(buffer* b,stralloc* sa,
                        int (*predicate)(stralloc* * sa));

DESCRIPTION
       buffer_get_token_sa_pred copies data from b to sa until predicate(sa)
       returns 1 or -1.

       If predicate returns 1 once a '\n' was read, that new-line character is
       still appended to sa -- use stralloc_chop or stralloc_chomp to get rid
       of it.  predicate can also return 0 (indicating further input is
       required to complete the token) or -1 (abort and return -1; use this if
       predicate wants to enfore a maximum message size or does timeout
       handling or detects a malformed message).

       If reading from the buffer or allocating memory fails,
       buffer_get_new_token_sa_pred returns -1 and sets errno appropriately.
       At that point sa may already contain a partial token.

       On success, buffer_get_new_token_sa_pred returns 0.

       If you want to read from a non-blocking socket, use
       buffer_get_token_sa_pred instead.

SEE ALSO
       buffer_getline_sa(3), buffer_get_token(3), buffer(3)

                                               buffer_get_new_token_sa_pred(3)