Please explain paragraph word pdf file 9.0.2

From Chapter 31,  p 589
This function opens a new database connection using the parameters taken from two NULL-terminatedarrays. The first, keywords, is defined as an array of strings, each one being a key word. The second,values, gives the value for each key word. Unlike PQsetdbLogin below, the parameter set can beextended without changing the function signature, so use of this function (or its nonblocking analogsPQconnectStartParams and PQconnectPoll) is preferred for new application programming.
My QuestionIn the above, when I read gives, I understand that the function has keywords, and values and after the function is called,  the values array is returned with contents, that is the function gives results to each value field.  
Or am I supposed to nderstand that when the author says gives, he really means contains, 
At the same time, what is the right hand end of the string at the bottom of the Page 588.  It is truncated at the right margin.

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