remove a bunch of dangerous casts (useless casts from void * to something

else, in some cases by adding extra temporary variables.
IMO, it's much better practice to do

void *a;
int *p = a;
*p = 42;

rather than
void *a;
*(int *)a = 42;

okay miod@... to be revisited for some possible const additions later.

11 files changed, 56 insertions, 50 deletions

diff --git a/usr.bin/make/compat.c b/usr.bin/make/compat.c
index fe538c4c53d..c6c362cf85f 100644
--- a/usr.bin/make/compat.c
+++ b/usr.bin/make/compat.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: compat.c,v 1.83 2013/06/20 19:48:32 espie Exp $	*/
+/*	$OpenBSD: compat.c,v 1.84 2015/01/23 13:18:40 espie Exp $	*/
 /*	$NetBSD: compat.c,v 1.14 1996/11/06 17:59:01 christos Exp $	*/
 
 /*
@@ -71,8 +71,8 @@ static void
 CompatMake(void *gnp,	/* The node to make */
     void *pgnp)		/* Parent to abort if necessary */
 {
-	GNode *gn = (GNode *)gnp;
-	GNode *pgn = (GNode *)pgnp;
+	GNode *gn = gnp;
+	GNode *pgn = gnp;
 
 	GNode *sib;
 	bool cmdsOk;
diff --git a/usr.bin/make/dir.c b/usr.bin/make/dir.c
index 4e9ef7bbc91..3ad73c9499e 100644
--- a/usr.bin/make/dir.c
+++ b/usr.bin/make/dir.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: dir.c,v 1.65 2015/01/16 15:36:29 deraadt Exp $ */
+/*	$OpenBSD: dir.c,v 1.66 2015/01/23 13:18:40 espie Exp $ */
 /*	$NetBSD: dir.c,v 1.14 1997/03/29 16:51:26 christos Exp $	*/
 
 /*
@@ -642,14 +642,15 @@ Dir_AddDiri(Lst path, const char *name, const char *ename)
 void *
 Dir_CopyDir(void *p)
 {
-	((struct PathEntry *)p)->refCount++;
+	struct PathEntry *q = p;
+	q->refCount++;
 	return p;
 }
 
 void
 Dir_Destroy(void *pp)
 {
-	struct PathEntry *p = (struct PathEntry *)pp;
+	struct PathEntry *p = pp;
 
 	if (--p->refCount == 0) {
 		ohash_remove(&knownDirectories,
@@ -685,7 +686,8 @@ Dir_Concat(Lst path1, Lst path2)
 static void
 DirPrintDir(void *p)
 {
-	printf("%s ", ((struct PathEntry *)p)->name);
+	struct PathEntry *q = p;
+	printf("%s ", q->name);
 }
 
 void
diff --git a/usr.bin/make/direxpand.c b/usr.bin/make/direxpand.c
index 1ce71951c5b..db29246b7a3 100644
--- a/usr.bin/make/direxpand.c
+++ b/usr.bin/make/direxpand.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: direxpand.c,v 1.5 2010/07/19 19:30:37 espie Exp $ */
+/*	$OpenBSD: direxpand.c,v 1.6 2015/01/23 13:18:40 espie Exp $ */
 /*
  * Copyright (c) 1999,2007 Marc Espie.
  *
@@ -298,7 +298,8 @@ Dir_Expandi(const char *word, const char *eword, Lst path, Lst expansions)
 static void
 DirPrintWord(void *word)
 {
-	printf("%s ", (char *)word);
+	char *s = word;
+	printf("%s ", s);
 }
 
 
diff --git a/usr.bin/make/dump.c b/usr.bin/make/dump.c
index 3b688f74c9e..accba322f83 100644
--- a/usr.bin/make/dump.c
+++ b/usr.bin/make/dump.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: dump.c,v 1.6 2014/05/18 08:08:50 espie Exp $ */
+/* $OpenBSD: dump.c,v 1.7 2015/01/23 13:18:40 espie Exp $ */
 /*
  * Copyright (c) 2012 Marc Espie.
  *
@@ -82,7 +82,7 @@ sort_ohash(struct ohash *h, int (*comparison)(const void *, const void *))
 static void
 TargPrintName(void *gnp)
 {
-	GNode *gn = (GNode *)gnp;
+	GNode *gn = gnp;
 	printf("%s ", gn->name);
 }
 
diff --git a/usr.bin/make/engine.c b/usr.bin/make/engine.c
index 541765d7cb7..734135efe37 100644
--- a/usr.bin/make/engine.c
+++ b/usr.bin/make/engine.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: engine.c,v 1.49 2014/10/31 13:29:42 gsoares Exp $ */
+/*	$OpenBSD: engine.c,v 1.50 2015/01/23 13:18:40 espie Exp $ */
 /*
  * Copyright (c) 2012 Marc Espie.
  *
@@ -427,7 +427,7 @@ Make_DoAllVar(GNode *gn)
 static void
 MakeTimeStamp(void *parent, void *child)
 {
-    Make_TimeStamp((GNode *)parent, (GNode *)child);
+    Make_TimeStamp(parent, child);
 }
 
 bool
diff --git a/usr.bin/make/for.c b/usr.bin/make/for.c
index 9613acbfb89..64887d5e769 100644
--- a/usr.bin/make/for.c
+++ b/usr.bin/make/for.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: for.c,v 1.45 2013/11/22 15:47:35 espie Exp $	*/
+/*	$OpenBSD: for.c,v 1.46 2015/01/23 13:18:40 espie Exp $	*/
 /*	$NetBSD: for.c,v 1.4 1996/11/06 17:59:05 christos Exp $ */
 
 /*
@@ -244,8 +244,8 @@ For_Accumulate(For *arg, const char *line)
 static void
 ForExec(void *valuep, void *argp)
 {
-	char *value = (char *)valuep;
-	For *arg = (For *)argp;
+	char *value = valuep;
+	For *arg = argp;
 	BUFFER buf;
 
 	/* Parse_FromString pushes stuff back, so we need to go over vars in
diff --git a/usr.bin/make/main.c b/usr.bin/make/main.c
index b6a172f8144..fc2c498d947 100644
--- a/usr.bin/make/main.c
+++ b/usr.bin/make/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.106 2015/01/16 15:36:30 deraadt Exp $ */
+/*	$OpenBSD: main.c,v 1.107 2015/01/23 13:18:40 espie Exp $ */
 /*	$NetBSD: main.c,v 1.34 1997/03/24 20:56:36 gwr Exp $	*/
 
 /*
@@ -803,8 +803,8 @@ main(int argc, char **argv)
 static bool
 ReadMakefile(void *p, void *q)
 {
-	char *fname = (char *)p;	/* makefile to read */
-	struct dirs *d = (struct dirs *)q;
+	char *fname = p;	/* makefile to read */
+	struct dirs *d = q;
 	FILE *stream;
 	char *name;
 
diff --git a/usr.bin/make/make.c b/usr.bin/make/make.c
index ad5807a4129..de4ee8ac2eb 100644
--- a/usr.bin/make/make.c
+++ b/usr.bin/make/make.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: make.c,v 1.68 2014/01/06 12:21:45 espie Exp $	*/
+/*	$OpenBSD: make.c,v 1.69 2015/01/23 13:18:40 espie Exp $	*/
 /*	$NetBSD: make.c,v 1.10 1996/11/06 17:59:15 christos Exp $	*/
 
 /*
@@ -434,8 +434,9 @@ MakePrintStatus(
 			     * a cycle in the graph, not an error in an
 			     * inferior */
 {
-	GNode	*gn = (GNode *)gnp;
-	bool	cycle = *(bool *)cyclep;
+	GNode	*gn = gnp;
+	bool 	*cp = cyclep;
+	bool	cycle = *cp;
 	if (gn->built_status == UPTODATE) {
 		printf("`%s' is up to date.\n", gn->name);
 	} else if (gn->unmade != 0) {
@@ -471,17 +472,18 @@ MakePrintStatus(
 static void
 MakeAddChild(void *to_addp, void *ap)
 {
-	GNode *gn = (GNode *)to_addp;
+	GNode *gn = to_addp;
+	struct growableArray *a = ap;
 
 	if (!gn->must_make && !(gn->type & OP_USE))
-		Array_Push((struct growableArray *)ap, gn);
+		Array_Push(a, gn);
 }
 
 static void
 MakeHandleUse(void *cgnp, void *pgnp)
 {
-	GNode *cgn = (GNode *)cgnp;
-	GNode *pgn = (GNode *)pgnp;
+	GNode *cgn = cgnp;
+	GNode *pgn = pgnp;
 
 	if (cgn->type & OP_USE)
 		Make_HandleUse(cgn, pgn);
diff --git a/usr.bin/make/parse.c b/usr.bin/make/parse.c
index 2f8edc7fba1..bf506b58036 100644
--- a/usr.bin/make/parse.c
+++ b/usr.bin/make/parse.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.c,v 1.110 2013/11/22 15:47:35 espie Exp $	*/
+/*	$OpenBSD: parse.c,v 1.111 2015/01/23 13:18:40 espie Exp $	*/
 /*	$NetBSD: parse.c,v 1.29 1997/03/10 21:20:04 christos Exp $	*/
 
 /*
@@ -478,7 +478,7 @@ ParseDoSrc(
 static int
 ParseFindMain(void *gnp, void *dummy UNUSED)
 {
-	GNode *gn = (GNode *)gnp;
+	GNode *gn = gnp;
 	if ((gn->type & OP_NOTARGET) == 0 && gn->special == SPECIAL_NONE) {
 		mainNode = gn;
 		return 0;
@@ -496,7 +496,7 @@ ParseFindMain(void *gnp, void *dummy UNUSED)
 static void
 ParseClearPath(void *p)
 {
-	Lst path = (Lst)p;
+	Lst path = p;
 
 	Lst_Destroy(path, Dir_Destroy);
 	Lst_Init(path);
@@ -998,7 +998,7 @@ ParseDoDependency(const char *line)	/* the line to parse */
 static void
 ParseAddCmd(void *gnp, void *cmd)
 {
-	GNode *gn = (GNode *)gnp;
+	GNode *gn = gnp;
 
 	if (!(gn->type & OP_HAS_COMMANDS))
 		Lst_AtEnd(&gn->commands, cmd);
@@ -1016,7 +1016,7 @@ ParseAddCmd(void *gnp, void *cmd)
 static void
 ParseHasCommands(void *gnp)
 {
-	GNode *gn = (GNode *)gnp;
+	GNode *gn = gnp;
 	gn->type |= OP_HAS_COMMANDS;
 
 }
diff --git a/usr.bin/make/suff.c b/usr.bin/make/suff.c
index 8c4b56f82e2..359657295cc 100644
--- a/usr.bin/make/suff.c
+++ b/usr.bin/make/suff.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: suff.c,v 1.88 2014/05/12 19:11:19 espie Exp $ */
+/*	$OpenBSD: suff.c,v 1.89 2015/01/23 13:18:40 espie Exp $ */
 /*	$NetBSD: suff.c,v 1.13 1996/11/06 17:59:25 christos Exp $	*/
 
 /*
@@ -679,8 +679,8 @@ SuffAddSrc(
     void *sp,		/* suffix for which to create a Src structure */
     void *lsp)		/* list and parent for the new Src */
 {
-	Suff *s = (Suff *)sp;
-	LstSrc *ls = (LstSrc *)lsp;
+	Suff *s = sp;
+	LstSrc *ls = lsp;
 	Src *s2;	/* new Src structure */
 	Src *targ;	/* Target structure */
 
@@ -1712,14 +1712,14 @@ Suff_Init(void)
 static void
 SuffPrintName(void *p)
 {
-	Suff *s = (Suff *)p;
+	Suff *s = p;
 	printf("%s ", s == emptySuff ? "<empty>" : s->name);
 }
 
 static void
 SuffPrintSuff(void *sp)
 {
-	Suff    *s = (Suff *)sp;
+	Suff    *s = sp;
 
 	printf("# %-5s ", s->name);
 
diff --git a/usr.bin/make/varmodifiers.c b/usr.bin/make/varmodifiers.c
index 19dac732e22..48f69c09a70 100644
--- a/usr.bin/make/varmodifiers.c
+++ b/usr.bin/make/varmodifiers.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: varmodifiers.c,v 1.39 2014/09/21 13:43:25 espie Exp $	*/
+/*	$OpenBSD: varmodifiers.c,v 1.40 2015/01/23 13:18:40 espie Exp $	*/
 /*	$NetBSD: var.c,v 1.18 1997/03/18 19:24:46 christos Exp $	*/
 
 /*
@@ -391,7 +391,7 @@ VarNoMatch(struct Name *word, bool addSpace, Buffer buf,
 static bool
 VarUniq(struct Name *word, bool addSpace, Buffer buf, void *lastp)
 {
-	struct Name *last = (struct Name *)lastp;
+	struct Name *last = lastp;
 
 	/* does not match */
 	if (last->s == NULL || last->e - last->s != word->e - word->s ||
@@ -409,7 +409,7 @@ VarUniq(struct Name *word, bool addSpace, Buffer buf, void *lastp)
 static bool
 VarLoop(struct Name *word, bool addSpace, Buffer buf, void *vp)
 {
-	struct LoopStuff *v = (struct LoopStuff *)vp;
+	struct LoopStuff *v = vp;
 
 	if (addSpace)
 		Buf_AddSpace(buf);
@@ -420,7 +420,7 @@ VarLoop(struct Name *word, bool addSpace, Buffer buf, void *vp)
 static char *
 finish_loop(const char *s, const struct Name *n UNUSED , void *p)
 {
-	struct LoopStuff *l = (struct LoopStuff *)p;
+	struct LoopStuff *l = p;
 
 	return Var_Subst(s, NULL,  l->err);
 }
@@ -514,7 +514,7 @@ do_path(const char *s UNUSED, const struct Name *n, void *arg UNUSED)
 static char *
 do_def(const char *s, const struct Name *n UNUSED, void *arg)
 {
-	VarPattern *v = (VarPattern *)arg;
+	VarPattern *v = arg;
 	if (s == NULL) {
 		free_patternarg(v);
 		return NULL;
@@ -525,7 +525,7 @@ do_def(const char *s, const struct Name *n UNUSED, void *arg)
 static char *
 do_undef(const char *s, const struct Name *n UNUSED, void *arg)
 {
-	VarPattern *v = (VarPattern *)arg;
+	VarPattern *v = arg;
 	if (s != NULL) {
 		free_patternarg(v);
 		return NULL;
@@ -536,7 +536,7 @@ do_undef(const char *s, const struct Name *n UNUSED, void *arg)
 static char *
 do_assign(const char *s, const struct Name *n, void *arg)
 {
-	VarPattern *v = (VarPattern *)arg;
+	VarPattern *v = arg;
 	char *msg;
 	char *result;
 
@@ -570,7 +570,7 @@ do_assign(const char *s, const struct Name *n, void *arg)
 static char *
 do_exec(const char *s UNUSED, const struct Name *n UNUSED, void *arg)
 {
-	VarPattern *v = (VarPattern *)arg;
+	VarPattern *v = arg;
 	char *msg;
 	char *result;
 
@@ -592,7 +592,7 @@ VarSYSVMatch(struct Name *word, bool addSpace, Buffer buf, void *patp)
 {
 	size_t	len;
 	const char	*ptr;
-	VarPattern	*pat = (VarPattern *)patp;
+	VarPattern	*pat = patp;
 
 	if (*word->s != '\0') {
 		if (addSpace)
@@ -682,7 +682,7 @@ VarSubstitute(struct Name *word, bool addSpace, Buffer buf,
 {
     size_t	wordLen;    /* Length of word */
     const char	*cp;	    /* General pointer */
-    VarPattern	*pattern = (VarPattern *)patternp;
+    VarPattern	*pattern = patternp;
 
     wordLen = word->e - word->s;
     if ((pattern->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) !=
@@ -1072,7 +1072,8 @@ VarGetPattern(SymTable *ctxt, int err, const char **tstr, int delim1,
 static char *
 VarQuote(const char *str, const struct Name *n UNUSED, void *islistp)
 {
-	int islist = *((int *)islistp);
+	int *p = islistp;
+	int islist = *p;
 
 	BUFFER	  buf;
 	/* This should cover most shells :-( */
@@ -1224,7 +1225,7 @@ get_spatternarg(const char **p, SymTable *ctxt, bool err, int endc)
 static void
 free_looparg(void *arg)
 {
-	struct LoopStuff *l = (struct LoopStuff *)arg;
+	struct LoopStuff *l = arg;
 
 	Var_DeleteLoopVar(l->var);
 	free(l->expand);
@@ -1388,7 +1389,7 @@ get_cmd(const char **p, SymTable *ctxt, bool err, int endc UNUSED)
 static void
 free_patternarg(void *p)
 {
-	VarPattern *vp = (VarPattern *)p;
+	VarPattern *vp = p;
 
 	free(vp->lbuffer);
 	free(vp->rhs);
@@ -1400,7 +1401,7 @@ static char *
 do_regex(const char *s, const struct Name *n UNUSED, void *arg)
 {
 	VarREPattern p2;
-	VarPattern *p = (VarPattern *)arg;
+	VarPattern *p = arg;
 	int error;
 	char *result;