buffer_get_token - read token from buffer
#include <libowfat/buffer.h>
ssize_t buffer_get_token(buffer* b,char*
x,size_t len,
const char* charset,size_t setlen);
buffer_get_token copies data from b to x[0], x[1], ...,
x[len-1] until len bytes have been copied or one of
charset[0], charset[1], ..., charset[setlen]
equals the last byte that was read. buffer_get_token returns the number of
bytes read or -1 on error (setting errno appropriately).
buffer_init(3), buffer_feed(3), buffer_peek(3), buffer_seek(3), buffer(3)