[src/trunk]: src/usr.bin/make make(1): extract Var_DeleteVar from Var_Delete

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

details:   https://anonhg.NetBSD.org/src/rev/bb23b572da26
branches:  trunk
changeset: 957985:bb23b572da26
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Dec 19 20:47:24 2020 +0000

description:
make(1): extract Var_DeleteVar from Var_Delete

diffstat:

 usr.bin/make/nonints.h |   3 ++-
 usr.bin/make/var.c     |  50 +++++++++++++++++++++++++++++++-------------------
 2 files changed, 33 insertions(+), 20 deletions(-)

diffs (100 lines):

diff -r f493fad2d124 -r bb23b572da26 usr.bin/make/nonints.h
--- a/usr.bin/make/nonints.h    Sat Dec 19 20:35:39 2020 +0000
+++ b/usr.bin/make/nonints.h    Sat Dec 19 20:47:24 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nonints.h,v 1.174 2020/12/19 20:16:36 rillig Exp $     */
+/*     $NetBSD: nonints.h,v 1.175 2020/12/19 20:47:24 rillig Exp $     */
 
 /*-
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -342,6 +342,7 @@
        VEM_LITERAL
 } VarExportMode;
 
+void Var_DeleteVar(const char *, GNode *);
 void Var_Delete(const char *, GNode *);
 void Var_Undef(char *);
 void Var_Set(const char *, const char *, GNode *);
diff -r f493fad2d124 -r bb23b572da26 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Sat Dec 19 20:35:39 2020 +0000
+++ b/usr.bin/make/var.c        Sat Dec 19 20:47:24 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.735 2020/12/19 20:16:36 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.736 2020/12/19 20:47:24 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -131,7 +131,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.735 2020/12/19 20:16:36 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.736 2020/12/19 20:47:24 rillig Exp $");
 
 /* A string that may need to be freed after use. */
 typedef struct FStr {
@@ -488,35 +488,47 @@
                DEBUG3(VAR, "%s:%s = %s\n", ctxt->name, name, val);
 }
 
+/*
+ * Remove a variable from a context, freeing all related memory as well.
+ * The variable name is kept as-is, it is not expanded.
+ */
+void
+Var_DeleteVar(const char *varname, GNode *ctxt)
+{
+       HashEntry *he = HashTable_FindEntry(&ctxt->vars, varname);
+       Var *v;
+
+       if (he == NULL) {
+               DEBUG2(VAR, "%s:delete %s (not found)\n", ctxt->name, varname);
+               return;
+       }
+
+       DEBUG2(VAR, "%s:delete %s\n", ctxt->name, varname);
+       v = HashEntry_Get(he);
+       if (v->flags & VAR_EXPORTED)
+               unsetenv(v->name.str);
+       if (strcmp(v->name.str, MAKE_EXPORTED) == 0)
+               var_exportedVars = VAR_EXPORTED_NONE;
+       assert(v->name.freeIt == NULL);
+       HashTable_DeleteEntry(&ctxt->vars, he);
+       Buf_Destroy(&v->val, TRUE);
+       free(v);
+}
+
 /* Remove a variable from a context, freeing all related memory as well.
  * The variable name is expanded once. */
 void
 Var_Delete(const char *name, GNode *ctxt)
 {
        char *name_freeIt = NULL;
-       HashEntry *he;
 
        if (strchr(name, '$') != NULL) {
                (void)Var_Subst(name, VAR_GLOBAL, VARE_WANTRES, &name_freeIt);
                /* TODO: handle errors */
                name = name_freeIt;
        }
-       he = HashTable_FindEntry(&ctxt->vars, name);
-       DEBUG3(VAR, "%s:delete %s%s\n",
-           ctxt->name, name, he != NULL ? "" : " (not found)");
-       free(name_freeIt);
-
-       if (he != NULL) {
-               Var *v = HashEntry_Get(he);
-               if (v->flags & VAR_EXPORTED)
-                       unsetenv(v->name.str);
-               if (strcmp(v->name.str, MAKE_EXPORTED) == 0)
-                       var_exportedVars = VAR_EXPORTED_NONE;
-               assert(v->name.freeIt == NULL);
-               HashTable_DeleteEntry(&ctxt->vars, he);
-               Buf_Destroy(&v->val, TRUE);
-               free(v);
-       }
+
+       Var_DeleteVar(name, ctxt);
 }
 
 void