[src/trunk]: src/usr.bin/make make(1): rename local variable in ApplyModifiers

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

details:   https://anonhg.NetBSD.org/src/rev/3a95b5d15577
branches:  trunk
changeset: 977816:3a95b5d15577
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Nov 01 22:48:41 2020 +0000

description:
make(1): rename local variable in ApplyModifiers

diffstat:

 usr.bin/make/var.c |  30 ++++++++++++++----------------
 1 files changed, 14 insertions(+), 16 deletions(-)

diffs (104 lines):

diff -r f904dd47f542 -r 3a95b5d15577 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Sun Nov 01 22:31:28 2020 +0000
+++ b/usr.bin/make/var.c        Sun Nov 01 22:48:41 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.639 2020/11/01 22:12:54 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.640 2020/11/01 22:48:41 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -130,7 +130,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.639 2020/11/01 22:12:54 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.640 2020/11/01 22:48:41 rillig Exp $");
 
 #define VAR_DEBUG1(fmt, arg1) DEBUG1(VAR, fmt, arg1)
 #define VAR_DEBUG2(fmt, arg1, arg2) DEBUG2(VAR, fmt, arg1, arg2)
@@ -2951,7 +2951,7 @@
     const char *op = mod + 1;
 
     if (op[0] == '=')
-        goto ok;
+       goto ok;
     if ((op[0] == '!' || op[0] == '+' || op[0] == '?') && op[1] == '=')
        goto ok;
     return AMR_UNKNOWN;                /* "::<unrecognised>" */
@@ -3105,15 +3105,12 @@
     if (res != VPR_OK)
        return AMR_CLEANUP;
 
+    /* The SysV modifier lasts until the end of the variable expression. */
     res = ParseModifierPart(pp, st->endc, st->eflags, st,
                            &rhs, NULL, NULL, NULL);
     if (res != VPR_OK)
        return AMR_CLEANUP;
 
-    /*
-     * SYSV modifications happen through the whole
-     * string. Note the pattern is anchored at the end.
-     */
     (*pp)--;
     if (lhs[0] == '\0' && st->val[0] == '\0') {
        st->newVal = st->val;   /* special case */
@@ -3261,17 +3258,18 @@
 static char *
 ApplyModifiers(
     const char **pp,           /* the parsing position, updated upon return */
-    char *val,                 /* the current value of the variable */
+    char *const val,           /* the current value of the expression */
     char const startc,         /* '(' or '{', or '\0' for indirect modifiers */
     char const endc,           /* ')' or '}', or '\0' for indirect modifiers */
     Var * const v,
     VarExprFlags *exprFlags,
     GNode * const ctxt,                /* for looking up and modifying variables */
     VarEvalFlags const eflags,
-    void ** const freePtr      /* free this after using the return value */
+    void ** const out_freeIt   /* free this after using the return value */
 ) {
     ApplyModifiersState st = {
-       startc, endc, v, ctxt, eflags, val,
+       startc, endc, v, ctxt, eflags,
+       val,                    /* .val */
        var_Error,              /* .newVal */
        ' ',                    /* .sep */
        FALSE,                  /* .oneBigWord */
@@ -3327,7 +3325,7 @@
            if (rval[0] != '\0') {
                const char *rval_pp = rval;
                st.val = ApplyModifiers(&rval_pp, st.val, '\0', '\0', v,
-                                       &st.exprFlags, ctxt, eflags, freePtr);
+                                       &st.exprFlags, ctxt, eflags, out_freeIt);
                if (st.val == var_Error
                    || (st.val == varUndefined && !(st.eflags & VARE_UNDEFERR))
                    || *rval_pp != '\0') {
@@ -3377,14 +3375,14 @@
            LogAfterApply(&st, p, mod);
 
        if (st.newVal != st.val) {
-           if (*freePtr) {
+           if (*out_freeIt) {
                free(st.val);
-               *freePtr = NULL;
+               *out_freeIt = NULL;
            }
            st.val = st.newVal;
            if (st.val != var_Error && st.val != varUndefined &&
                st.val != emptyString) {
-               *freePtr = st.val;
+               *out_freeIt = st.val;
            }
        }
        if (*p == '\0' && st.endc != '\0') {
@@ -3411,8 +3409,8 @@
 
 cleanup:
     *pp = p;
-    free(*freePtr);
-    *freePtr = NULL;
+    free(*out_freeIt);
+    *out_freeIt = NULL;
     *exprFlags = st.exprFlags;
     return var_Error;
 }