btparse::doc::bt_format_names(3)				      btparse					  btparse::doc::bt_format_names(3)

NAME

       bt_format_names - formatting BibTeX names for consistent output

SYNOPSIS

	  bt_name_format * bt_create_name_format (char * parts,
						  boolean abbrev_first);
	  void bt_free_name_format (bt_name_format * format);
	  void bt_set_format_text (bt_name_format * format,
				   bt_namepart part,
				   char * pre_part,
				   char * post_part,
				   char * pre_token,
				   char * post_token);
	  void bt_set_format_options (bt_name_format * format,
				      bt_namepart part,
				      boolean abbrev,
				      bt_joinmethod join_tokens,
				      bt_joinmethod join_part);
	  char * bt_format_name (bt_name * name, bt_name_format * format);

DESCRIPTION

       After splitting a name into its components parts (represented as a "bt_name" structure), you often want to put it back together again as a
       single string in a consistent way.  btparse provides a very flexible way to do this, generally in two stages: first, you create a "name
       format" which describes how to put the tokens and parts of any name back together, and then you apply the format to a particular name.

       The "name format" is encapsulated in a "bt_name_format" structure, which is created with "bt_create_name_format()".  This function includes
       some clever trickery that means you can usually get away with calling it alone, and not need to do any customization of the format.  If you
       do need to customize the format, though, "bt_set_format_text()" and "bt_set_format_options()" provide that capability.

       The format controls the following:

       o   which name parts are printed, and in what order (e.g. "first von last jr", or "von last jr first")

       o   the text that precedes and follows each part (e.g. if the first name follows the last name, you probably want a comma before the
	   `first' part: "Smith, John" rather than "Smith John")

       o   the text that precedes and follows each token (e.g. if the first name is abbreviated, you may want a period after each token: "J. R.
	   Smith" rather than "J R Smith")

       o   the method used to join the tokens of each part together

       o   the method used to join each part to the following part

       All of these except the list of parts to format are kept in arrays indexed by name part: for example, the structure has a field

	  char * post_token[BT_MAX_NAMEPARTS]

       and "post_token[BTN_FIRST]" ("BTN_FIRST" is from the "bt_namepart" "enum") is the string to be added after each token in the first
       name---for example, "." if the first name is to be abbreviated in the conventional way.

       Yet another "enum", "bt_joinmethod", describes the available methods for joining tokens together.  Note that there are two sets of join
       methods in a name format: between tokens within a single part, and between the tokens of two different parts.  The first allows you, for
       example, to change "J R Smith" (first name abbreviated with no post-token text but tokens joined by a space) to "JR Smith" (the same, but
       first-name tokens jammed together).  The second is mainly used to ensure that "von" and "last" name-parts may be joined with a tie:
       "de~Roche" rather than "de Roche".

       The token join methods are:

       BTJ_MAYTIE
	   Insert a "discretionary tie" between tokens.  That is, either a space or a "tie" is inserted, depending on context.	(A "tie,"
	   otherwise known as unbreakable space, is currently hard-coded as "~"---from TeX.)

	   The format is then applied to a particular name by "bt_format_name()", which returns a new string.

       BTJ_SPACE
	   Always insert a space between tokens.

       BTJ_FORCETIE
	   Always insert a "tie" ("~") between tokens.

       BTJ_NOTHING
	   Insert nothing between tokens---just jam them together.

       Tokens are joined together, and thus the choice of whether to insert a "discretionary tie" is made, at two places: within a part and
       between two parts.  Naturally, this only applies when "BTJ_MAYTIE" was supplied as the token-join method; "BTJ_SPACE" and "BTJ_FORCETIE"
       always insert either a space or tie, and "BTJ_NOTHING" always adds nothing between tokens.  Within a part, ties are added after a the first
       token if it is less than three characters long, and before the last token.  Between parts, a tie is added only if the preceding part
       consisted of single token that was less than three characters long.  In all other cases, spaces are inserted.  (This implementation
       slavishly follows BibTeX.)

FUNCTIONS

       bt_create_name_format()
	      bt_name_format * bt_create_name_format (char * parts,
						      boolean abbrev_first)

	   Creates a name format for a given set of parts, with variations for the most common forms of customization---the order of parts and
	   whether to abbreviate the first name.

	   The "parts" parameter specifies which parts to include in a formatted name, as well as the order in which to format them.  "parts" must
	   be a string of four or fewer characters, each of which denotes one of the four name parts: for instance, "vljf" means to format all
	   four parts in "von last jr first" order.  No characters outside of the set "fvlj" are allowed, and no characters may be repeated.
	   "abbrev_first" controls whether the `first' part will be abbreviated (i.e., only the first letter from each token will be printed).

	   In addition to simply setting the list of parts to format and the "abbreviate" flag for the first name, "bt_create_name_format()"
	   initializes the entire format structure so as to minimize the need for further customizations:

	   o   The "token join method"---what to insert between tokens of the same part---is set to "BTJ_MAYTIE" (discretionary tie) for all parts

	   o   The "part join method"---what to insert after the final token of a particular part, assuming there are more parts to come---is set
	       to "BTJ_SPACE" for the `first', `last', and `jr' parts.	If the `von' part is present and immediately precedes the `last' part
	       (which will almost always be the case), "BTJ_MAYTIE" is used to join `von' to `last'; otherwise, `von' also gets "BTJ_SPACE" for
	       the inter-part join method.

	   o   The abbreviation flag is set to "FALSE" for the `von', `last', and `jr' parts; for `first', the abbreviation flag is set to
	       whatever you pass in as "abbrev_first".

	   o   Initially, all "surrounding text" (pre-part, post-part, pre-token, and post-token) for all parts is set to the empty string.  Then
	       a few tweaks are done, depending on the "abbrev_first" flag and the order of tokens.  First, if "abbrev_first" is "TRUE", the post-
	       token text for first name is set to "."---this changes "J R Smith" to "J. R. Smith", which is usually the desired form.	(If you
	       don't want the periods, you'll have to set the post-token text yourself with "bt_set_format_text()".)

	       Then, if `jr' is present and immediately after `last' (almost always the case), the pre-part text for `jr' is set to ", ", and the
	       inter-part join method for `last' is set to "BTJ_NOTHING".  This changes "John Smith Jr" (where the space following "Smith" comes
	       from formatting the last name with a "BTJ_SPACE" inter-part join method) to "John Smith, Jr" (where the ", " is now associated with
	       "Jr"---that way, if there is no `jr' part, the ", " will not be printed.)

	       Finally, if `first' is present and immediately follows either `jr' or `last' (which will usually be the case in "last-name first"
	       formats), the same sort of trickery is applied: the pre-part text for `first' is set to ", ", and the part join method for the
	       preceding part (either `jr' or `last') is set to "BTJ_NOTHING".

	   While all these rules are rather complicated, they mean that you are usually freed from having to do any customization of the name
	   format.  Certainly this is the case if you only need "fvlj" and "vljf" part orders, only want to abbreviate the first name, want
	   periods after abbreviated tokens, non-breaking spaces in the "right" places, and commas in the conventional places.

	   If you want something out of the ordinary---for instance, abbreviated tokens jammed together with no puncuation, or abbreviated last
	   names---you'll need to customize the name format a bit with "bt_set_format_text()" and "bt_set_format_options()".

       bt_free_name_format()
	      void bt_free_name_format (bt_name_format * format)

	   Frees a name format created by "bt_create_name_format()".

       bt_set_format_text()
	      void bt_set_format_text (bt_name_format * format,
				       bt_namepart part,
				       char * pre_part,
				       char * post_part,
				       char * pre_token,
				       char * post_token)

	   Allows you to customize some or all of the surrounding text for a single name part.	Supply "NULL" for any chunk of text that you don't
	   want to change.

	   For instance, say you want a name format that will abbreviate first names, but without any punctuation after the abbreviated tokens.
	   You could create and customize the format as follows:

	      format = bt_create_name_format ("fvlj", TRUE);
	      bt_set_format_text (format,
				  BTN_FIRST,	   /* name-part to customize */
				  NULL, NULL,	   /* pre- and post- part text */
				  NULL, "");	   /* empty string for post-token */

	   Without the "bt_set_format_text()" call, "format" would result in names formatted like "J. R. Smith".  After setting the post-token
	   text for first names to "", this name would become "J R Smith".

       bt_set_format_options()
	      void bt_set_format_options (bt_name_format * format,
					  bt_namepart part,
					  boolean abbrev,
					  bt_joinmethod join_tokens,
					  bt_joinmethod join_part)

	   Allows further customization of a name format: you can set the abbreviation flag and the two token-join methods.  Alas, there is no
	   mechanism for leaving a value unchanged; you must set everything with "bt_set_format_options()".

	   For example, let's say that just dropping periods from abbreviated tokens in the first name isn't enough; you really want to save space
	   by jamming the abbreviated tokens together: "JR Smith" rather than "J R Smith"  Assuming the two calls in the above example have been
	   done, the following will finish the job:

	      bt_set_format_options (format, BTN_FIRST,
				     TRUE,	   /* keep same value for abbrev flag */
				     BTJ_NOTHING,  /* jam tokens together */
				     BTJ_SPACE);   /* space after final token of part */

	   Note that we unfortunately had to know (and supply) the current values for the abbreviation flag and post-part join method, even though
	   we were only setting the intra-part join method.

       bt_format_name()
	      char * bt_format_name (bt_name * name, bt_name_format * format)

	   Once a name format has been created and customized to your heart's content, you can use it to format any number of names that have been
	   split with "bt_split_name" (see bt_split_names).  Simply pass the name structure and name format structure, and a newly-allocated
	   string containing the formatted name will be returned to you.  It is your responsibility to "free()" this string.

SEE ALSO

       btparse, bt_split_names

AUTHOR

       Greg Ward <gward@python.net>

btparse, version 0.63						    2012-05-12					  btparse::doc::bt_format_names(3)