Added an option -ldi<N> to control indentation of local variable names.

The default is to be backwards compatible and non-KNF (use the same
indentation for locals as for globals; -ldi0 gives KNF indentation
for locals (none)).  The indentation for globals also applies to struct
member names in local declatations.  The indentation of variable names
in multi-line declarations is broken in various ways and this commit
gives some new variations.

indent.1:
Also clarified the description of -di<N>.

usr.bin/indent/args.c

@@ -121,6 +121,7 @@ struct pro {
     {"ip", PRO_BOOL, true, ON, &ps.indent_parameters},
     {"i", PRO_INT, 8, 0, &ps.ind_size},
     {"lc", PRO_INT, 0, 0, &block_comment_max_col},
+    {"ldi", PRO_INT, -1, 0, &ps.local_decl_indent},
     {"lp", PRO_BOOL, true, ON, &lineup_to_parens},
     {"l", PRO_INT, 78, 0, &max_col},
     {"nbacc", PRO_BOOL, false, OFF, &blanklines_around_conditional_compilation},

usr.bin/indent/indent.1

@@ -69,6 +69,7 @@
 .Op Fl \&ip | Fl nip
 .Op Fl l Ns Ar n
 .Op Fl \&lc Ns Ar n
+.Op Fl \&ldi Ns Ar n
 .Op Fl \&lp | Fl nlp
 .Op Fl npro
 .Op Fl pcs | Fl npcs
@@ -219,8 +220,10 @@ left of code.  Specifying the default
 lines-up these comments with the code.  See the section on comment
 indentation below.
 .It Fl \&di Ns Ar n
-Specifies the indentation, in character positions, from a declaration keyword
-to the following identifier.  The default is
+Specifies the indentation, in character positions,
+of global variable names and all struct/union member names
+relative to the beginning of their type declaration.
+The default is
 .Fl di16  .
 .It Fl dj , ndj
 .Fl \&dj
@@ -267,6 +270,12 @@ margin.  The default is
 .Fl \&ip  .
 .It Fl l Ns Ar n
 Maximum length of an output line.  The default is 78.
+.It Fl \&ldi Ns Ar n
+Specifies the indentation, in character positions,
+of local variable names
+relative to the beginning of their type declaration.
+The default is for local variable names to be indented
+by the same amount as global ones.
 .It Fl \&lp , nlp
 Lines-up code surrounded by parenthesis in continuation lines.  If a line
 has a left paren which is not closed on that line, then continuation lines

usr.bin/indent/indent.c

@@ -168,6 +168,9 @@ main(int argc, char **argv)
     ps.ind_size = 8;		/* -i8 */
     verbose = 0;
     ps.decl_indent = 16;	/* -di16 */
+    ps.local_decl_indent = -1;	/* if this is not set to some nonnegative value
+				 * by an arg, we will set this equal to
+				 * ps.decl_ind */
     ps.indent_parameters = 1;	/* -ip */
     ps.decl_com_ind = 0;	/* if this is not set to some positive value
 				 * by an arg, we will set this equal to
@@ -254,6 +257,8 @@ main(int argc, char **argv)
     }
     if (block_comment_max_col <= 0)
 	block_comment_max_col = max_col;
+    if (ps.local_decl_indent < 0)	/* if not specified by user, set this */
+	ps.local_decl_indent = ps.decl_indent;
     if (ps.decl_com_ind <= 0)	/* if not specified by user, set this */
 	ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind;
     if (continuation_indent == 0)
@@ -906,8 +911,15 @@ main(int argc, char **argv)
 	    prefix_blankline_requested = 0;
 	    for (i = 0; token[i++];);	/* get length of token */
 
-	    dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i;
-	    use_tabs = ps.decl_indent > 0;
+	    if (ps.ind_level == 0 || ps.dec_nest > 0) {
+		/* global variable or struct member in local variable */
+		dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i;
+		use_tabs = ps.decl_indent > 0;
+	    } else {
+		/* local variable */
+		dec_ind = ps.local_decl_indent > 0 ? ps.local_decl_indent : i;
+		use_tabs = ps.local_decl_indent > 0;
+	    }
 	    goto copy_id;
 
 	case ident:		/* got an identifier or constant */

usr.bin/indent/indent_globs.h

@@ -303,6 +303,7 @@ struct parser_state {
     int         else_if;	/* True iff else if pairs should be handled
 				 * specially */
     int         decl_indent;	/* column to indent declared identifiers to */
+    int         local_decl_indent;	/* like decl_indent but for locals */
     int         its_a_keyword;
     int         sizeof_keyword;
     int         dumped_decl_indent;