[src/trunk]: src/usr.bin/make make(1): use char literals, improve documentation

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2fb8df3f7195
branches:  trunk
changeset: 937135:2fb8df3f7195
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Aug 09 14:30:35 2020 +0000

description:
make(1): use char literals, improve documentation

diffstat:

 usr.bin/make/var.c |  16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diffs (61 lines):

diff -r 4a4b6ce38584 -r 2fb8df3f7195 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Sun Aug 09 14:02:15 2020 +0000
+++ b/usr.bin/make/var.c        Sun Aug 09 14:30:35 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.443 2020/08/09 14:02:15 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.444 2020/08/09 14:30:35 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.443 2020/08/09 14:02:15 rillig Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.444 2020/08/09 14:30:35 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)var.c      8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: var.c,v 1.443 2020/08/09 14:02:15 rillig Exp $");
+__RCSID("$NetBSD: var.c,v 1.444 2020/08/09 14:30:35 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -1933,7 +1933,8 @@
                                 * to the expression */
     char missing_delim;                /* For error reporting */
 
-    Byte sep;                  /* Word separator in expansions */
+    Byte sep;                  /* Word separator in expansions
+                                * (see the :ts modifier) */
     Boolean oneBigWord;                /* TRUE if the variable value is treated as a
                                 * single big word, even if it contains
                                 * embedded spaces (as opposed to the
@@ -2991,13 +2992,12 @@
 #endif
 
 /* Apply any modifiers (such as :Mpattern or :@var@loop@ or :Q or ::=value). */
-
 static char *
 ApplyModifiers(
     const char **pp,           /* the parsing position, updated upon return */
     char *val,                 /* the current value of the variable */
-    char const startc,         /* '(' or '{' or '\0' */
-    char const endc,           /* ')' or '}' or '\0' */
+    char const startc,         /* '(' or '{', or '\0' for indirect modifiers */
+    char const endc,           /* ')' or '}', or '\0' for indirect modifiers */
     Var * const v,             /* the variable may have its flags changed */
     GNode * const ctxt,                /* for looking up and modifying variables */
     VarEvalFlags const eflags,
@@ -3045,7 +3045,7 @@
 
            if (rval != NULL && *rval) {
                const char *rval_pp = rval;
-               st.val = ApplyModifiers(&rval_pp, st.val, 0, 0, v,
+               st.val = ApplyModifiers(&rval_pp, st.val, '\0', '\0', v,
                                        ctxt, eflags, freePtr);
                if (st.val == var_Error
                    || (st.val == varNoError && !(st.eflags & VARE_UNDEFERR))