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- /*
- * Copyright (c) 1990 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND CARNEGIE MELLON UNIVERSITY
- * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT
- * SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
- * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
- * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Users of this software agree to return to Carnegie Mellon any
- * improvements or extensions that they make and grant Carnegie the
- * rights to redistribute these changes.
- *
- * Export of this software is permitted only after complying with the
- * regulations of the U.S. Deptartment of Commerce relating to the
- * Export of Technical Data.
- */
- /* prstab, fprstab -- print list of strings
- *
- * Usage: prstab (table);
- * fprstab (file,table);
- * char **table;
- * FILE *file;
- *
- * table is an array of pointers to strings, ending with a 0
- * value. This is the same format as "stablk" tables.
- *
- * Prstab will attempt to print the strings in a concise format,
- * using multiple columns if its heuristics indicate that this is
- * desirable.
- * Fprstab is the same, but you can specify the file instead of using
- * stdout.
- *
- * The heuristics are these: assume that each column must be at
- * least as wide as the longest string plus three blanks. Figure
- * out how many columns can fit on a line, and suppose that we use
- * that many columns. This represents the "widest" useable format.
- * Now, see if this is too wide. This means that there are just a
- * few strings, and we would like them to be printed in fewer columns,
- * with each column being a little bit longer. The heuristic rule is
- * that we will always use at least some minimum number of rows (8)
- * if there are at least that many strings.
- *
- * HISTORY
- * $Log: prstab.c,v $
- * Revision 1.2 90/12/11 17:57:52 mja
- * Add copyright/disclaimer for distribution.
- *
- * 28-Apr-85 Steven Shafer (sas) at Carnegie-Mellon University
- * Modified for 4.2 BSD. Also added fprstab() routine.
- *
- * 15-Mar-83 Steven Shafer (sas) at Carnegie-Mellon University
- * Fixed two bugs: printing extra spaces at end of last column, and
- * dividing by zero if ncol = 0 (i.e. very long string).
- *
- * 16-Apr-80 Steven Shafer (sas) at Carnegie-Mellon University
- * Created.
- *
- */
-
- #include <stdio.h>
-
- #define SPACE 5 /* min. space between columns */
- #define MAXCOLS 71 /* max. cols on line */
- #define MINROWS 8 /* min. rows to be printed */
-
- prstab (list)
- char **list;
- {
- fprstab (stdout,list);
- }
-
- fprstab (file,list)
- FILE *file;
- char **list;
- {
- register int nelem; /* # elements in list */
- register int maxwidth; /* widest element */
- register int i,l; /* temps */
- register int row,col; /* current position */
- register int nrow,ncol; /* desired format */
- char format[20]; /* format for printing strings */
-
- maxwidth = 0;
- for (i=0; list[i]; i++) {
- l = strlen (list[i]);
- if (l > maxwidth) maxwidth = l;
- }
-
- nelem = i;
- if (nelem <= 0) return;
-
- ncol = MAXCOLS / (maxwidth + SPACE);
- if (ncol < 1) ncol = 1; /* for very long strings */
- if (ncol > (nelem + MINROWS - 1) / MINROWS)
- ncol = (nelem + MINROWS - 1) / MINROWS;
- nrow = (nelem + ncol - 1) / ncol;
-
- sprintf (format,"%%-%ds",maxwidth+SPACE);
-
- for (row=0; row<nrow; row++) {
- fprintf (file,"\t");
- for (col=0; col<ncol; col++) {
- i = row + (col * nrow);
- if (i < nelem) {
- if (col < ncol - 1) {
- fprintf (file,format,list[i]);
- }
- else {
- fprintf (file,"%s",list[i]);
- }
- }
- }
- fprintf (file,"\n");
- }
- }
-