Module Name:    src
Committed By:   rillig
Date:           Fri Nov  5 21:39:12 UTC 2021

Modified Files:
        src/usr.bin/indent: indent.h io.c

Log Message:
indent: the '+ 1' in dump_line_code is not an off-by-one error


To generate a diff of this commit:
cvs rdiff -u -r1.77 -r1.78 src/usr.bin/indent/indent.h
cvs rdiff -u -r1.114 -r1.115 src/usr.bin/indent/io.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/usr.bin/indent/indent.h
diff -u src/usr.bin/indent/indent.h:1.77 src/usr.bin/indent/indent.h:1.78
--- src/usr.bin/indent/indent.h:1.77	Fri Nov  5 19:33:28 2021
+++ src/usr.bin/indent/indent.h	Fri Nov  5 21:39:12 2021
@@ -1,4 +1,4 @@
-/*	$NetBSD: indent.h,v 1.77 2021/11/05 19:33:28 rillig Exp $	*/
+/*	$NetBSD: indent.h,v 1.78 2021/11/05 21:39:12 rillig Exp $	*/
 
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
@@ -283,7 +283,8 @@ extern struct parser_state {
 				 * statement */
     short paren_indents[20];	/* indentation of the operand/argument of each
 				 * level of parentheses or brackets, relative
-				 * to the enclosing statement */
+				 * to the enclosing statement; if negative,
+				 * reflected at -1 */
     int cast_mask;		/* indicates which close parentheses
 				 * potentially close off casts */
     int not_cast_mask;		/* indicates which close parentheses

Index: src/usr.bin/indent/io.c
diff -u src/usr.bin/indent/io.c:1.114 src/usr.bin/indent/io.c:1.115
--- src/usr.bin/indent/io.c:1.114	Thu Nov  4 19:23:57 2021
+++ src/usr.bin/indent/io.c	Fri Nov  5 21:39:12 2021
@@ -1,4 +1,4 @@
-/*	$NetBSD: io.c,v 1.114 2021/11/04 19:23:57 rillig Exp $	*/
+/*	$NetBSD: io.c,v 1.115 2021/11/05 21:39:12 rillig Exp $	*/
 
 /*-
  * SPDX-License-Identifier: BSD-4-Clause
@@ -43,7 +43,7 @@ static char sccsid[] = "@(#)io.c	8.1 (Be
 
 #include <sys/cdefs.h>
 #if defined(__NetBSD__)
-__RCSID("$NetBSD: io.c,v 1.114 2021/11/04 19:23:57 rillig Exp $");
+__RCSID("$NetBSD: io.c,v 1.115 2021/11/05 21:39:12 rillig Exp $");
 #elif defined(__FreeBSD__)
 __FBSDID("$FreeBSD: head/usr.bin/indent/io.c 334927 2018-06-10 16:44:18Z pstef $");
 #endif
@@ -150,8 +150,7 @@ dump_line_code(int ind)
     for (int i = 0; i < ps.p_l_follow; i++) {
 	if (ps.paren_indents[i] >= 0) {
 	    int paren_ind = ps.paren_indents[i];
-	    /* XXX: the '+ 1' smells like an off-by-one error. */
-	    ps.paren_indents[i] = (short)-(paren_ind + target_ind + 1);
+	    ps.paren_indents[i] = (short)(-1 - (paren_ind + target_ind));
 	    debug_println(
 		"setting paren_indents[%d] from %d to %d for column %d",
 		i, paren_ind, ps.paren_indents[i], target_ind + 1);

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