 @@ -1,3523 +1,3535 @@
-/*	$NetBSD: var.c,v 1.313 2020/07/26 15:09:10 rillig Exp $	*/
+/*	$NetBSD: var.c,v 1.314 2020/07/26 15:26:27 rillig Exp $	*/
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
+ *
  * This code is derived from software contributed to Berkeley by
  * Adam de Boor.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 /*
  * Copyright (c) 1989 by Berkeley Softworks
  * All rights reserved.
+ *
  * This code is derived from software contributed to Berkeley by
  * Adam de Boor.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *	This product includes software developed by the University of
  *	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.313 2020/07/26 15:09:10 rillig Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.314 2020/07/26 15:26:27 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 1.313 2020/07/26 15:09:10 rillig Exp $");
+__RCSID("$NetBSD: var.c,v 1.314 2020/07/26 15:26:27 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
 /*-
  * var.c --
  *	Variable-handling functions
+ *
  * Interface:
  *	Var_Set		    Set the value of a variable in the given
  *			    context. The variable is created if it doesn't
  *			    yet exist.
+ *
  *	Var_Append	    Append more characters to an existing variable
  *			    in the given context. The variable needn't
  *			    exist already -- it will be created if it doesn't.
  *			    A space is placed between the old value and the
  *			    new one.
+ *
  *	Var_Exists	    See if a variable exists.
+ *
  *	Var_Value 	    Return the value of a variable in a context or
  *			    NULL if the variable is undefined.
+ *
  *	Var_Subst 	    Substitute either a single variable or all
  *			    variables in a string, using the given context.
+ *
  *	Var_Parse 	    Parse a variable expansion from a string and
  *			    return the result and the number of characters
  *			    consumed.
+ *
  *	Var_Delete	    Delete a variable in a context.
+ *
  *	Var_Init  	    Initialize this module.
+ *
  * Debugging:
  *	Var_Dump  	    Print out all variables defined in the given
  *			    context.
+ *
  * XXX: There's a lot of duplication in these functions.
  */
 #include    <sys/stat.h>
 #ifndef NO_REGEX
 #include    <sys/types.h>
 #include    <regex.h>
 #endif
 #include    <ctype.h>
 #include    <inttypes.h>
 #include    <limits.h>
 #include    <stdlib.h>
 #include    <time.h>
 #include    "make.h"
 #include    "buf.h"
 #include    "dir.h"
 #include    "job.h"
 #include    "metachar.h"
 /*
  * This lets us tell if we have replaced the original environ
  * (which we cannot free).
  */
 char **savedEnv = NULL;
 /*
  * This is a harmless return value for Var_Parse that can be used by Var_Subst
  * to determine if there was an error in parsing -- easier than returning
  * a flag, as things outside this module don't give a hoot.
  */
 char var_Error[] = "";
 /*
  * Similar to var_Error, but returned when the 'VARE_UNDEFERR' flag for
  * Var_Parse is not set. Why not just use a constant? Well, GCC likes
  * to condense identical string instances...
  */
 static char varNoError[] = "";
 /*
  * Traditionally we consume $$ during := like any other expansion.
  * Other make's do not.
  * This knob allows controlling the behavior.
  * FALSE to consume $$ during := assignment.
  * TRUE to preserve $$ during := assignment.
  */
 #define SAVE_DOLLARS ".MAKE.SAVE_DOLLARS"
 static Boolean save_dollars = TRUE;
 /*
  * Internally, variables are contained in four different contexts.
  *	1) the environment. They cannot be changed. If an environment
  *	    variable is appended to, the result is placed in the global
  *	    context.
  *	2) the global context. Variables set in the Makefile are located in
  *	    the global context.
  *	3) the command-line context. All variables set on the command line
  *	   are placed in this context. They are UNALTERABLE once placed here.
  *	4) the local context. Each target has associated with it a context
  *	   list. On this list are located the structures describing such
  *	   local variables as $(@) and $(*)
  * The four contexts are searched in the reverse order from which they are
  * listed (but see checkEnvFirst).
  */
 GNode          *VAR_INTERNAL;	/* variables from make itself */
 GNode          *VAR_GLOBAL;	/* variables from the makefile */
 GNode          *VAR_CMD;	/* variables defined on the command-line */
 typedef enum {
     FIND_CMD		= 0x01,	/* look in VAR_CMD when searching */
     FIND_GLOBAL		= 0x02,	/* look in VAR_GLOBAL as well */
     FIND_ENV		= 0x04	/* look in the environment also */
 } VarFindFlags;
 typedef enum {
     VAR_IN_USE		= 0x01,	/* Variable's value is currently being used
 				 * by Var_Parse or Var_Subst.
 				 * Used to avoid endless recursion */
     VAR_FROM_ENV	= 0x02,	/* Variable comes from the environment */
     VAR_JUNK		= 0x04,	/* Variable is a junk variable that
 				 * should be destroyed when done with
 				 * it. Used by Var_Parse for undefined,
 				 * modified variables */
     VAR_KEEP		= 0x08,	/* Variable is VAR_JUNK, but we found
 				 * a use for it in some modifier and
 				 * the value is therefore valid */
     VAR_EXPORTED	= 0x10,	/* Variable is exported */
     VAR_REEXPORT	= 0x20,	/* Indicate if var needs re-export.
 				 * This would be true if it contains $'s */
     VAR_FROM_CMD	= 0x40	/* Variable came from command line */
 } Var_Flags;
 typedef struct Var {
     char          *name;	/* the variable's name */
     Buffer	  val;		/* its value */
     Var_Flags	  flags;    	/* miscellaneous status flags */
 }  Var;
 /*
  * Exporting vars is expensive so skip it if we can
  */
 typedef enum {
     VAR_EXPORTED_NONE,
     VAR_EXPORTED_YES,
     VAR_EXPORTED_ALL
 } VarExportedMode;
 static VarExportedMode var_exportedVars = VAR_EXPORTED_NONE;
 typedef enum {
     /*
      * We pass this to Var_Export when doing the initial export
      * or after updating an exported var.
      */
     VAR_EXPORT_PARENT	= 0x01,
     /*
      * We pass this to Var_Export1 to tell it to leave the value alone.
      */
     VAR_EXPORT_LITERAL	= 0x02
 } VarExportFlags;
 /* Flags for pattern matching in the :S and :C modifiers */
 typedef enum {
     VARP_SUB_GLOBAL	= 0x01,	/* Apply substitution globally */
     VARP_SUB_ONE	= 0x02,	/* Apply substitution to one word */
     VARP_SUB_MATCHED	= 0x04,	/* There was a match */
     VARP_ANCHOR_START	= 0x08,	/* Match at start of word */
     VARP_ANCHOR_END	= 0x10	/* Match at end of word */
 } VarPatternFlags;
 typedef enum {
     VAR_NO_EXPORT	= 0x01	/* do not export */
 } VarSet_Flags;
 #define BROPEN	'{'
 #define BRCLOSE	'}'
 #define PROPEN	'('
 #define PRCLOSE	')'
 /*-
  *-----------------------------------------------------------------------
  * VarFind --
  *	Find the given variable in the given context and any other contexts
  *	indicated.
+ *
  * Input:
  *	name		name to find
  *	ctxt		context in which to find it
  *	flags		FIND_GLOBAL	look in VAR_GLOBAL as well
  *			FIND_CMD	look in VAR_CMD as well
  *			FIND_ENV	look in the environment as well
+ *
  * Results:
  *	A pointer to the structure describing the desired variable or
  *	NULL if the variable does not exist.
+ *
  * Side Effects:
  *	None
  *-----------------------------------------------------------------------
  */
 static Var *
 VarFind(const char *name, GNode *ctxt, VarFindFlags flags)
+{
     /*
      * If the variable name begins with a '.', it could very well be one of
      * the local ones.  We check the name against all the local variables
      * and substitute the short version in for 'name' if it matches one of
      * them.
      */
     if (*name == '.' && isupper((unsigned char) name[1])) {
 	switch (name[1]) {
 	case 'A':
 	    if (strcmp(name, ".ALLSRC") == 0)
 		name = ALLSRC;
 	    if (strcmp(name, ".ARCHIVE") == 0)
 		name = ARCHIVE;
 	    break;
 	case 'I':
 	    if (strcmp(name, ".IMPSRC") == 0)
 		name = IMPSRC;
 	    break;
 	case 'M':
 	    if (strcmp(name, ".MEMBER") == 0)
 		name = MEMBER;
 	    break;
 	case 'O':
 	    if (strcmp(name, ".OODATE") == 0)
 		name = OODATE;
 	    break;
 	case 'P':
 	    if (strcmp(name, ".PREFIX") == 0)
 		name = PREFIX;
 	    break;
 	case 'T':
 	    if (strcmp(name, ".TARGET") == 0)
 		name = TARGET;
 	    break;
+	}
+    }
 #ifdef notyet
     /* for compatibility with gmake */
     if (name[0] == '^' && name[1] == '\0')
 	name = ALLSRC;
 #endif
     /*
      * First look for the variable in the given context. If it's not there,
      * look for it in VAR_CMD, VAR_GLOBAL and the environment, in that order,
      * depending on the FIND_* flags in 'flags'
      */
     Hash_Entry *var = Hash_FindEntry(&ctxt->context, name);
     if (var == NULL && (flags & FIND_CMD) && ctxt != VAR_CMD) {
 	var = Hash_FindEntry(&VAR_CMD->context, name);
+    }
     if (!checkEnvFirst && var == NULL && (flags & FIND_GLOBAL) &&
 	ctxt != VAR_GLOBAL)
+    {
 	var = Hash_FindEntry(&VAR_GLOBAL->context, name);
 	if (var == NULL && ctxt != VAR_INTERNAL) {
 	    /* VAR_INTERNAL is subordinate to VAR_GLOBAL */
 	    var = Hash_FindEntry(&VAR_INTERNAL->context, name);
+	}
+    }
     if (var == NULL && (flags & FIND_ENV)) {
 	char *env;
 	if ((env = getenv(name)) != NULL) {
 	    Var *v = bmake_malloc(sizeof(Var));
 	    v->name = bmake_strdup(name);
 	    int len = (int)strlen(env);
 	    Buf_Init(&v->val, len + 1);
 	    Buf_AddBytes(&v->val, len, env);
 	    v->flags = VAR_FROM_ENV;
 	    return v;
 	} else if (checkEnvFirst && (flags & FIND_GLOBAL) &&
 		   ctxt != VAR_GLOBAL)
+	{
 	    var = Hash_FindEntry(&VAR_GLOBAL->context, name);
 	    if (var == NULL && ctxt != VAR_INTERNAL) {
 		var = Hash_FindEntry(&VAR_INTERNAL->context, name);
+	    }
 	    if (var == NULL) {
 		return NULL;
 	    } else {
 		return (Var *)Hash_GetValue(var);
+	    }
 	} else {
 	    return NULL;
+	}
     } else if (var == NULL) {
 	return NULL;
     } else {
 	return (Var *)Hash_GetValue(var);
+    }
+}
 /*-
  *-----------------------------------------------------------------------
  * VarFreeEnv  --
  *	If the variable is an environment variable, free it
+ *
  * Input:
  *	v		the variable
  *	destroy		true if the value buffer should be destroyed.
+ *
  * Results:
  *	1 if it is an environment variable 0 ow.
+ *
  * Side Effects:
  *	The variable is free'ed if it is an environent variable.
  *-----------------------------------------------------------------------
  */
 static Boolean
 VarFreeEnv(Var *v, Boolean destroy)
+{
     if (!(v->flags & VAR_FROM_ENV))
 	return FALSE;
     free(v->name);
     Buf_Destroy(&v->val, destroy);
     free(v);
     return TRUE;
+}
 /*-
  *-----------------------------------------------------------------------
  * VarAdd  --
  *	Add a new variable of name name and value val to the given context
+ *
  * Input:
  *	name		name of variable to add
  *	val		value to set it to
  *	ctxt		context in which to set it
+ *
  * Side Effects:
  *	The new variable is placed at the front of the given context
  *	The name and val arguments are duplicated so they may
  *	safely be freed.
  *-----------------------------------------------------------------------
  */
 static void
 VarAdd(const char *name, const char *val, GNode *ctxt)
+{
     Var *v = bmake_malloc(sizeof(Var));
     int len = val != NULL ? (int)strlen(val) : 0;
     Buf_Init(&v->val, len + 1);
     Buf_AddBytes(&v->val, len, val);
     v->flags = 0;
     Hash_Entry *h = Hash_CreateEntry(&ctxt->context, name, NULL);
     Hash_SetValue(h, v);
     v->name = h->name;
     if (DEBUG(VAR) && !(ctxt->flags & INTERNAL)) {
 	fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
+    }
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Delete --
  *	Remove a variable from a context.
+ *
  * Side Effects:
  *	The Var structure is removed and freed.
+ *
  *-----------------------------------------------------------------------
  */
 void
 Var_Delete(const char *name, GNode *ctxt)
+{
     Hash_Entry 	  *ln;
     char *cp;
     if (strchr(name, '$') != NULL) {
 	cp = Var_Subst(NULL, name, VAR_GLOBAL, VARE_WANTRES);
     } else {
 	cp = UNCONST(name);
+    }
     ln = Hash_FindEntry(&ctxt->context, cp);
     if (DEBUG(VAR)) {
 	fprintf(debug_file, "%s:delete %s%s\n",
 	    ctxt->name, cp, ln ? "" : " (not found)");
+    }
     if (cp != name)
 	free(cp);
     if (ln != NULL) {
 	Var *v = (Var *)Hash_GetValue(ln);
 	if (v->flags & VAR_EXPORTED)
 	    unsetenv(v->name);
 	if (strcmp(MAKE_EXPORTED, v->name) == 0)
 	    var_exportedVars = VAR_EXPORTED_NONE;
 	if (v->name != ln->name)
 	    free(v->name);
 	Hash_DeleteEntry(&ctxt->context, ln);
 	Buf_Destroy(&v->val, TRUE);
 	free(v);
+    }
+}
 /*
  * Export a var.
  * We ignore make internal variables (those which start with '.')
  * Also we jump through some hoops to avoid calling setenv
  * more than necessary since it can leak.
  * We only manipulate flags of vars if 'parent' is set.
  */
 static int
 Var_Export1(const char *name, VarExportFlags flags)
+{
     char tmp[BUFSIZ];
     Var *v;
     char *val = NULL;
     int n;
     VarExportFlags parent = flags & VAR_EXPORT_PARENT;
     if (*name == '.')
 	return 0;		/* skip internals */
     if (!name[1]) {
 	/*
 	 * A single char.
 	 * If it is one of the vars that should only appear in
 	 * local context, skip it, else we can get Var_Subst
 	 * into a loop.
 	 */
 	switch (name[0]) {
 	case '@':
 	case '%':
 	case '*':
 	case '!':
 	    return 0;
+	}
+    }
     v = VarFind(name, VAR_GLOBAL, 0);
     if (v == NULL)
 	return 0;
     if (!parent &&
 	(v->flags & (VAR_EXPORTED | VAR_REEXPORT)) == VAR_EXPORTED) {
 	return 0;			/* nothing to do */
+    }
     val = Buf_GetAll(&v->val, NULL);
     if ((flags & VAR_EXPORT_LITERAL) == 0 && strchr(val, '$')) {
 	if (parent) {
 	    /*
 	     * Flag this as something we need to re-export.
 	     * No point actually exporting it now though,
 	     * the child can do it at the last minute.
 	     */
 	    v->flags |= (VAR_EXPORTED | VAR_REEXPORT);
 	    return 1;
+	}
 	if (v->flags & VAR_IN_USE) {
 	    /*
 	     * We recursed while exporting in a child.
 	     * This isn't going to end well, just skip it.
 	     */
 	    return 0;
+	}
 	n = snprintf(tmp, sizeof(tmp), "${%s}", name);
 	if (n < (int)sizeof(tmp)) {
 	    val = Var_Subst(NULL, tmp, VAR_GLOBAL, VARE_WANTRES);
 	    setenv(name, val, 1);
 	    free(val);
+	}
     } else {
 	if (parent)
 	    v->flags &= ~VAR_REEXPORT;	/* once will do */
 	if (parent || !(v->flags & VAR_EXPORTED))
 	    setenv(name, val, 1);
+    }
     /*
      * This is so Var_Set knows to call Var_Export again...
      */
     if (parent) {
 	v->flags |= VAR_EXPORTED;
+    }
     return 1;
+}
 static void
 Var_ExportVars_callback(void *entry, void *unused MAKE_ATTR_UNUSED)
+{
     Var *var = entry;
     Var_Export1(var->name, 0);
+}
 /*
  * This gets called from our children.
  */
 void
 Var_ExportVars(void)
+{
     char tmp[BUFSIZ];
     char *val;
     int n;
     /*
      * Several make's support this sort of mechanism for tracking
      * recursion - but each uses a different name.
      * We allow the makefiles to update MAKELEVEL and ensure
      * children see a correctly incremented value.
      */
     snprintf(tmp, sizeof(tmp), "%d", makelevel + 1);
     setenv(MAKE_LEVEL_ENV, tmp, 1);
     if (VAR_EXPORTED_NONE == var_exportedVars)
 	return;
     if (VAR_EXPORTED_ALL == var_exportedVars) {
 	/* Ouch! This is crazy... */
 	Hash_ForEach(&VAR_GLOBAL->context, Var_ExportVars_callback, NULL);
 	return;
+    }
     /*
      * We have a number of exported vars,
      */
     n = snprintf(tmp, sizeof(tmp), "${" MAKE_EXPORTED ":O:u}");
     if (n < (int)sizeof(tmp)) {
 	char **av;
 	char *as;
 	int ac;
 	int i;
 	val = Var_Subst(NULL, tmp, VAR_GLOBAL, VARE_WANTRES);
 	if (*val) {
 	    av = brk_string(val, &ac, FALSE, &as);
 	    for (i = 0; i < ac; i++)
 		Var_Export1(av[i], 0);
 	    free(as);
 	    free(av);
+	}
 	free(val);
+    }
+}
 /*
  * This is called when .export is seen or
  * .MAKE.EXPORTED is modified.
  * It is also called when any exported var is modified.
  */
 void
 Var_Export(char *str, int isExport)
+{
     char **av;
     char *as;
     VarExportFlags flags;
     int ac;
     int i;
     if (isExport && (!str || !str[0])) {
 	var_exportedVars = VAR_EXPORTED_ALL; /* use with caution! */
 	return;
+    }
     flags = 0;
     if (strncmp(str, "-env", 4) == 0) {
 	str += 4;
     } else if (strncmp(str, "-literal", 8) == 0) {
 	str += 8;
 	flags |= VAR_EXPORT_LITERAL;
     } else {
 	flags |= VAR_EXPORT_PARENT;
+    }
     char *val = Var_Subst(NULL, str, VAR_GLOBAL, VARE_WANTRES);
     if (*val) {
 	av = brk_string(val, &ac, FALSE, &as);
 	for (i = 0; i < ac; i++) {
 	    const char *name = av[i];
 	    if (!name[1]) {
 		/*
 		 * A single char.
 		 * If it is one of the vars that should only appear in
 		 * local context, skip it, else we can get Var_Subst
 		 * into a loop.
 		 */
 		switch (name[0]) {
 		case '@':
 		case '%':
 		case '*':
 		case '!':
 		    continue;
+		}
+	    }
 	    if (Var_Export1(name, flags)) {
 		if (VAR_EXPORTED_ALL != var_exportedVars)
 		    var_exportedVars = VAR_EXPORTED_YES;
 		if (isExport && (flags & VAR_EXPORT_PARENT)) {
 		    Var_Append(MAKE_EXPORTED, name, VAR_GLOBAL);
+		}
+	    }
+	}
 	free(as);
 	free(av);
+    }
     free(val);
+}
 extern char **environ;
 /*
  * This is called when .unexport[-env] is seen.
  */
 void
 Var_UnExport(char *str)
+{
     char tmp[BUFSIZ];
     char *vlist;
     char *cp;
     Boolean unexport_env;
     int n;
     if (str == NULL || str[0] == '\0')
 	return;			/* assert? */
     vlist = NULL;
     str += 8;
     unexport_env = (strncmp(str, "-env", 4) == 0);
     if (unexport_env) {
 	char **newenv;
 	cp = getenv(MAKE_LEVEL_ENV);	/* we should preserve this */
 	if (environ == savedEnv) {
 	    /* we have been here before! */
 	    newenv = bmake_realloc(environ, 2 * sizeof(char *));
 	} else {
 	    if (savedEnv) {
 		free(savedEnv);
 		savedEnv = NULL;
+	    }
 	    newenv = bmake_malloc(2 * sizeof(char *));
+	}
 	if (!newenv)
 	    return;
 	/* Note: we cannot safely free() the original environ. */
 	environ = savedEnv = newenv;
 	newenv[0] = NULL;
 	newenv[1] = NULL;
 	if (cp && *cp)
 	    setenv(MAKE_LEVEL_ENV, cp, 1);
     } else {
 	for (; *str != '\n' && isspace((unsigned char) *str); str++)
 	    continue;
 	if (str[0] && str[0] != '\n') {
 	    vlist = str;
+	}
+    }
     if (!vlist) {
 	/* Using .MAKE.EXPORTED */
 	vlist = Var_Subst(NULL, "${" MAKE_EXPORTED ":O:u}", VAR_GLOBAL,
 			  VARE_WANTRES);
+    }
     if (vlist) {
 	Var *v;
 	char **av;
 	char *as;
 	int ac;
 	int i;
 	av = brk_string(vlist, &ac, FALSE, &as);
 	for (i = 0; i < ac; i++) {
 	    v = VarFind(av[i], VAR_GLOBAL, 0);
 	    if (!v)
 		continue;
 	    if (!unexport_env &&
 		(v->flags & (VAR_EXPORTED | VAR_REEXPORT)) == VAR_EXPORTED)
 		unsetenv(v->name);
 	    v->flags &= ~(VAR_EXPORTED | VAR_REEXPORT);
 	    /*
 	     * If we are unexporting a list,
 	     * remove each one from .MAKE.EXPORTED.
 	     * If we are removing them all,
 	     * just delete .MAKE.EXPORTED below.
 	     */
 	    if (vlist == str) {
 		n = snprintf(tmp, sizeof(tmp),
 			     "${" MAKE_EXPORTED ":N%s}", v->name);
 		if (n < (int)sizeof(tmp)) {
 		    cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARE_WANTRES);
 		    Var_Set(MAKE_EXPORTED, cp, VAR_GLOBAL);
 		    free(cp);
+		}
+	    }
+	}
 	free(as);
 	free(av);
 	if (vlist != str) {
 	    Var_Delete(MAKE_EXPORTED, VAR_GLOBAL);
 	    free(vlist);
+	}
+    }
+}
 static void
 Var_Set_with_flags(const char *name, const char *val, GNode *ctxt,
 		   VarSet_Flags flags)
+{
     Var *v;
     char *expanded_name = NULL;
     /*
      * We only look for a variable in the given context since anything set
      * here will override anything in a lower context, so there's not much
      * point in searching them all just to save a bit of memory...
      */
     if (strchr(name, '$') != NULL) {
 	expanded_name = Var_Subst(NULL, name, ctxt, VARE_WANTRES);
 	if (expanded_name[0] == '\0') {
 	    if (DEBUG(VAR)) {
 		fprintf(debug_file, "Var_Set(\"%s\", \"%s\", ...) "
 			"name expands to empty string - ignored\n",
 			name, val);
+	    }
 	    free(expanded_name);
 	    return;
+	}
 	name = expanded_name;
+    }
     if (ctxt == VAR_GLOBAL) {
 	v = VarFind(name, VAR_CMD, 0);
 	if (v != NULL) {
 	    if ((v->flags & VAR_FROM_CMD)) {
 		if (DEBUG(VAR)) {
 		    fprintf(debug_file, "%s:%s = %s ignored!\n", ctxt->name, name, val);
+		}
 		goto out;
+	    }
 	    VarFreeEnv(v, TRUE);
+	}
+    }
     v = VarFind(name, ctxt, 0);
     if (v == NULL) {
 	if (ctxt == VAR_CMD && (flags & VAR_NO_EXPORT) == 0) {
 	    /*
 	     * This var would normally prevent the same name being added
 	     * to VAR_GLOBAL, so delete it from there if needed.
 	     * Otherwise -V name may show the wrong value.
 	     */
 	    Var_Delete(name, VAR_GLOBAL);
+	}
 	VarAdd(name, val, ctxt);
     } else {
 	Buf_Empty(&v->val);
 	if (val)
 	    Buf_AddStr(&v->val, val);
 	if (DEBUG(VAR)) {
 	    fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
+	}
 	if ((v->flags & VAR_EXPORTED)) {
 	    Var_Export1(name, VAR_EXPORT_PARENT);
+	}
+    }
     /*
      * Any variables given on the command line are automatically exported
      * to the environment (as per POSIX standard)
      */
     if (ctxt == VAR_CMD && (flags & VAR_NO_EXPORT) == 0) {
 	if (v == NULL) {
 	    /* we just added it */
 	    v = VarFind(name, ctxt, 0);
+	}
 	if (v != NULL)
 	    v->flags |= VAR_FROM_CMD;
 	/*
 	 * If requested, don't export these in the environment
 	 * individually.  We still put them in MAKEOVERRIDES so
 	 * that the command-line settings continue to override
 	 * Makefile settings.
 	 */
 	if (varNoExportEnv != TRUE)
 	    setenv(name, val ? val : "", 1);
 	Var_Append(MAKEOVERRIDES, name, VAR_GLOBAL);
+    }
     if (name[0] == '.' && strcmp(name, SAVE_DOLLARS) == 0)
 	save_dollars = s2Boolean(val, save_dollars);
 out:
     free(expanded_name);
     if (v != NULL)
 	VarFreeEnv(v, TRUE);
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Set --
  *	Set the variable name to the value val in the given context.
+ *
  * Input:
  *	name		name of variable to set
  *	val		value to give to the variable
  *	ctxt		context in which to set it
+ *
  * Side Effects:
  *	If the variable doesn't yet exist, a new record is created for it.
  *	Else the old value is freed and the new one stuck in its place
+ *
  * Notes:
  *	The variable is searched for only in its context before being
  *	created in that context. I.e. if the context is VAR_GLOBAL,
  *	only VAR_GLOBAL->context is searched. Likewise if it is VAR_CMD, only
  *	VAR_CMD->context is searched. This is done to avoid the literally
  *	thousands of unnecessary strcmp's that used to be done to
  *	set, say, $(@) or $(<).
  *	If the context is VAR_GLOBAL though, we check if the variable
  *	was set in VAR_CMD from the command line and skip it if so.
  *-----------------------------------------------------------------------
  */
 void
 Var_Set(const char *name, const char *val, GNode *ctxt)
+{
     Var_Set_with_flags(name, val, ctxt, 0);
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Append --
  *	The variable of the given name has the given value appended to it in
  *	the given context.
+ *
  * Input:
  *	name		name of variable to modify
  *	val		String to append to it
  *	ctxt		Context in which this should occur
+ *
  * Side Effects:
  *	If the variable doesn't exist, it is created. Else the strings
  *	are concatenated (with a space in between).
+ *
  * Notes:
  *	Only if the variable is being sought in the global context is the
  *	environment searched.
  *	XXX: Knows its calling circumstances in that if called with ctxt
  *	an actual target, it will only search that context since only
  *	a local variable could be being appended to. This is actually
  *	a big win and must be tolerated.
  *-----------------------------------------------------------------------
  */
 void
 Var_Append(const char *name, const char *val, GNode *ctxt)
+{
     Var *v;
     Hash_Entry *h;
     char *expanded_name = NULL;
     if (strchr(name, '$') != NULL) {
 	expanded_name = Var_Subst(NULL, name, ctxt, VARE_WANTRES);
 	if (expanded_name[0] == '\0') {
 	    if (DEBUG(VAR)) {
 		fprintf(debug_file, "Var_Append(\"%s\", \"%s\", ...) "
 			"name expands to empty string - ignored\n",
 			name, val);
+	    }
 	    free(expanded_name);
 	    return;
+	}
 	name = expanded_name;
+    }
     v = VarFind(name, ctxt, ctxt == VAR_GLOBAL ? (FIND_CMD | FIND_ENV) : 0);
     if (v == NULL) {
 	Var_Set(name, val, ctxt);
     } else if (ctxt == VAR_CMD || !(v->flags & VAR_FROM_CMD)) {
 	Buf_AddByte(&v->val, ' ');
 	Buf_AddStr(&v->val, val);
 	if (DEBUG(VAR)) {
 	    fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name,
 		    Buf_GetAll(&v->val, NULL));
+	}
 	if (v->flags & VAR_FROM_ENV) {
 	    /*
 	     * If the original variable came from the environment, we
 	     * have to install it in the global context (we could place
 	     * it in the environment, but then we should provide a way to
 	     * export other variables...)
 	     */
 	    v->flags &= ~VAR_FROM_ENV;
 	    h = Hash_CreateEntry(&ctxt->context, name, NULL);
 	    Hash_SetValue(h, v);
+	}
+    }
     free(expanded_name);
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Exists --
  *	See if the given variable exists.
+ *
  * Input:
  *	name		Variable to find
  *	ctxt		Context in which to start search
+ *
  * Results:
  *	TRUE if it does, FALSE if it doesn't
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 Boolean
 Var_Exists(const char *name, GNode *ctxt)
+{
     Var		  *v;
     char          *cp;
     if ((cp = strchr(name, '$')) != NULL)
 	cp = Var_Subst(NULL, name, ctxt, VARE_WANTRES);
     v = VarFind(cp ? cp : name, ctxt, FIND_CMD | FIND_GLOBAL | FIND_ENV);
     free(cp);
     if (v == NULL)
 	return FALSE;
     (void)VarFreeEnv(v, TRUE);
     return TRUE;
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Value --
  *	Return the value of the named variable in the given context
+ *
  * Input:
  *	name		name to find
  *	ctxt		context in which to search for it
+ *
  * Results:
  *	The value if the variable exists, NULL if it doesn't
+ *
  * Side Effects:
  *	None
  *-----------------------------------------------------------------------
  */
 char *
 Var_Value(const char *name, GNode *ctxt, char **frp)
+{
     Var *v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
     *frp = NULL;
     if (v == NULL)
 	return NULL;
     char *p = Buf_GetAll(&v->val, NULL);
     if (VarFreeEnv(v, FALSE))
 	*frp = p;
     return p;
+}
 /* SepBuf is a string being built from "words", interleaved with separators. */
 typedef struct {
     Buffer buf;
     Boolean needSep;
     char sep;
 } SepBuf;
 static void
 SepBuf_Init(SepBuf *buf, char sep)
+{
     Buf_Init(&buf->buf, 32 /* bytes */);
     buf->needSep = FALSE;
     buf->sep = sep;
+}
 static void
 SepBuf_Sep(SepBuf *buf)
+{
     buf->needSep = TRUE;
+}
 static void
-SepBuf_AddBytes(SepBuf *buf, const void *mem, size_t mem_size)
+SepBuf_AddBytes(SepBuf *buf, const char *mem, size_t mem_size)
+{
     if (mem_size == 0)
 	return;
     if (buf->needSep && buf->sep != '\0') {
 	Buf_AddByte(&buf->buf, buf->sep);
 	buf->needSep = FALSE;
+    }
     Buf_AddBytes(&buf->buf, mem_size, mem);
+}
 static void
 SepBuf_AddBytesBetween(SepBuf *buf, const char *start, const char *end)
+{
     SepBuf_AddBytes(buf, start, (size_t)(end - start));
+}
 static void
 SepBuf_AddStr(SepBuf *buf, const char *str)
+{
     SepBuf_AddBytes(buf, str, strlen(str));
+}
 static char *
 SepBuf_Destroy(SepBuf *buf, Boolean free_buf)
+{
     return Buf_Destroy(&buf->buf, free_buf);
+}
 /* This callback for ModifyWords gets a single word from an expression and
  * typically adds a modification of this word to the buffer. It may also do
  * nothing or add several words. */
 typedef void (*ModifyWordsCallback)(const char *word, SepBuf *buf, void *data);
 /* Callback for ModifyWords to implement the :H modifier.
  * Add the dirname of the given word to the buffer. */
 static void
 ModifyWord_Head(const char *word, SepBuf *buf, void *dummy MAKE_ATTR_UNUSED)
+{
     const char *slash = strrchr(word, '/');
     if (slash != NULL)
-	SepBuf_AddBytes(buf, word, slash - word);
+	SepBuf_AddBytesBetween(buf, word, slash);
     else
-	SepBuf_AddBytes(buf, ".", 1);
+	SepBuf_AddStr(buf, ".");
+}
 /* Callback for ModifyWords to implement the :T modifier.
  * Add the basename of the given word to the buffer. */
 static void
 ModifyWord_Tail(const char *word, SepBuf *buf, void *dummy MAKE_ATTR_UNUSED)
+{
     const char *slash = strrchr(word, '/');
     const char *base = slash != NULL ? slash + 1 : word;
-    SepBuf_AddBytes(buf, base, strlen(base));
+    SepBuf_AddStr(buf, base);
+}
 /* Callback for ModifyWords to implement the :E modifier.
  * Add the filename suffix of the given word to the buffer, if it exists. */
 static void
 ModifyWord_Suffix(const char *word, SepBuf *buf, void *dummy MAKE_ATTR_UNUSED)
+{
     const char *dot = strrchr(word, '.');
     if (dot != NULL)
-	SepBuf_AddBytes(buf, dot + 1, strlen(dot + 1));
+	SepBuf_AddStr(buf, dot + 1);
+}
 /* Callback for ModifyWords to implement the :R modifier.
  * Add the basename of the given word to the buffer. */
 static void
 ModifyWord_Root(const char *word, SepBuf *buf, void *dummy MAKE_ATTR_UNUSED)
+{
-    char *dot = strrchr(word, '.');
+    const char *dot = strrchr(word, '.');
     size_t len = dot != NULL ? (size_t)(dot - word) : strlen(word);
     SepBuf_AddBytes(buf, word, len);
+}
 /* Callback for ModifyWords to implement the :M modifier.
  * Place the word in the buffer if it matches the given pattern. */
 static void
 ModifyWord_Match(const char *word, SepBuf *buf, void *data)
+{
     const char *pattern = data;
     if (DEBUG(VAR))
 	fprintf(debug_file, "VarMatch [%s] [%s]\n", word, pattern);
     if (Str_Match(word, pattern))
-	SepBuf_AddBytes(buf, word, strlen(word));
+	SepBuf_AddStr(buf, word);
+}
 /* Callback for ModifyWords to implement the :N modifier.
  * Place the word in the buffer if it doesn't match the given pattern. */
 static void
 ModifyWord_NoMatch(const char *word, SepBuf *buf, void *data)
+{
     const char *pattern = data;
     if (!Str_Match(word, pattern))
-	SepBuf_AddBytes(buf, word, strlen(word));
+	SepBuf_AddStr(buf, word);
+}
 #ifdef SYSVVARSUB
 /*-
  *-----------------------------------------------------------------------
  * Str_SYSVMatch --
  *	Check word against pattern for a match (% is wild),
+ *
  * Input:
  *	word		Word to examine
  *	pattern		Pattern to examine against
  *	len		Number of characters to substitute
+ *
  * Results:
  *	Returns the beginning position of a match or null. The number
  *	of characters matched is returned in len.
  *-----------------------------------------------------------------------
  */
 static const char *
 Str_SYSVMatch(const char *word, const char *pattern, size_t *len,
     Boolean *hasPercent)
+{
     const char *p = pattern;
     const char *w = word;
     const char *m;
     *hasPercent = FALSE;
     if (*p == '\0') {
 	/* Null pattern is the whole string */
 	*len = strlen(w);
 	return w;
+    }
     if ((m = strchr(p, '%')) != NULL) {
 	*hasPercent = TRUE;
 	if (*w == '\0') {
 		/* empty word does not match pattern */
 		return NULL;
+	}
 	/* check that the prefix matches */
 	for (; p != m && *w && *w == *p; w++, p++)
 	     continue;
 	if (p != m)
 	    return NULL;	/* No match */
 	if (*++p == '\0') {
 	    /* No more pattern, return the rest of the string */
 	    *len = strlen(w);
 	    return w;
+	}
+    }
     m = w;
     /* Find a matching tail */
     do {
 	if (strcmp(p, w) == 0) {
 	    *len = w - m;
 	    return m;
+	}
     } while (*w++ != '\0');
     return NULL;
+}
 /*-
  *-----------------------------------------------------------------------
  * Str_SYSVSubst --
  *	Substitute '%' on the pattern with len characters from src.
  *	If the pattern does not contain a '%' prepend len characters
  *	from src.
+ *
  * Side Effects:
  *	Places result on buf
  *-----------------------------------------------------------------------
  */
 static void
 Str_SYSVSubst(SepBuf *buf, const char *pat, const char *src, size_t len,
 	      Boolean lhsHasPercent)
+{
     const char *m;
     if ((m = strchr(pat, '%')) != NULL && lhsHasPercent) {
 	/* Copy the prefix */
-	SepBuf_AddBytes(buf, pat, m - pat);
+	SepBuf_AddBytesBetween(buf, pat, m);
 	/* skip the % */
 	pat = m + 1;
+    }
     if (m != NULL || !lhsHasPercent) {
 	/* Copy the pattern */
 	SepBuf_AddBytes(buf, src, len);
+    }
     /* append the rest */
-    SepBuf_AddBytes(buf, pat, strlen(pat));
+    SepBuf_AddStr(buf, pat);
+}
 typedef struct {
     GNode *ctx;
     const char *lhs;
     const char *rhs;
 } ModifyWord_SYSVSubstArgs;
 /* Callback for ModifyWords to implement the :%.from=%.to modifier. */
 static void
 ModifyWord_SYSVSubst(const char *word, SepBuf *buf, void *data)
+{
     const ModifyWord_SYSVSubstArgs *args = data;
     size_t len;
     Boolean hasPercent;
     const char *ptr = Str_SYSVMatch(word, args->lhs, &len, &hasPercent);
     if (ptr != NULL) {
 	char *varexp = Var_Subst(NULL, args->rhs, args->ctx, VARE_WANTRES);
 	Str_SYSVSubst(buf, varexp, ptr, len, hasPercent);
 	free(varexp);
     } else {
-	SepBuf_AddBytes(buf, word, strlen(word));
+	SepBuf_AddStr(buf, word);
+    }
+}
 #endif
 typedef struct {
     const char	*lhs;
     size_t	lhsLen;
     const char	*rhs;
     size_t	rhsLen;
     VarPatternFlags pflags;
 } ModifyWord_SubstArgs;
 /* Callback for ModifyWords to implement the :S,from,to, modifier.
  * Perform a string substitution on the given word. */
 static void
 ModifyWord_Subst(const char *word, SepBuf *buf, void *data)
+{
     size_t wordLen = strlen(word);
     ModifyWord_SubstArgs *args = data;
     const VarPatternFlags pflags = args->pflags;
     if ((pflags & VARP_SUB_ONE) && (pflags & VARP_SUB_MATCHED))
 	goto nosub;
     if (args->pflags & VARP_ANCHOR_START) {
 	if (wordLen < args->lhsLen ||
 	    memcmp(word, args->lhs, args->lhsLen) != 0)
 	    goto nosub;
 	if (args->pflags & VARP_ANCHOR_END) {
 	    if (wordLen != args->lhsLen)
 		goto nosub;
 	    SepBuf_AddBytes(buf, args->rhs, args->rhsLen);
 	    args->pflags |= VARP_SUB_MATCHED;
 	} else {
 	    SepBuf_AddBytes(buf, args->rhs, args->rhsLen);
 	    SepBuf_AddBytes(buf, word + args->lhsLen, wordLen - args->lhsLen);
 	    args->pflags |= VARP_SUB_MATCHED;
+	}
 	return;
+    }
     if (args->pflags & VARP_ANCHOR_END) {
 	if (wordLen < args->lhsLen)
 	    goto nosub;
 	const char *start = word + (wordLen - args->lhsLen);
 	if (memcmp(start, args->lhs, args->lhsLen) != 0)
 	    goto nosub;
-	SepBuf_AddBytes(buf, word, start - word);
+	SepBuf_AddBytesBetween(buf, word, start);
 	SepBuf_AddBytes(buf, args->rhs, args->rhsLen);
 	args->pflags |= VARP_SUB_MATCHED;
 	return;
+    }
     /* unanchored */
     const char *cp;
     while ((cp = Str_FindSubstring(word, args->lhs)) != NULL) {
-	SepBuf_AddBytes(buf, word, cp - word);
+	SepBuf_AddBytesBetween(buf, word, cp);
 	SepBuf_AddBytes(buf, args->rhs, args->rhsLen);
 	args->pflags |= VARP_SUB_MATCHED;
 	wordLen -= (cp - word) + args->lhsLen;
 	word = cp + args->lhsLen;
 	if (wordLen == 0 || !(args->pflags & VARP_SUB_GLOBAL))
 	    break;
+    }
 nosub:
     SepBuf_AddBytes(buf, word, wordLen);
+}
 #ifndef NO_REGEX
 /*-
  *-----------------------------------------------------------------------
  * VarREError --
  *	Print the error caused by a regcomp or regexec call.
+ *
  * Side Effects:
  *	An error gets printed.
+ *
  *-----------------------------------------------------------------------
  */
 static void
 VarREError(int reerr, regex_t *pat, const char *str)
+{
     char *errbuf;
     int errlen;
     errlen = regerror(reerr, pat, 0, 0);
     errbuf = bmake_malloc(errlen);
     regerror(reerr, pat, errbuf, errlen);
     Error("%s: %s", str, errbuf);
     free(errbuf);
+}
 typedef struct {
     regex_t	   re;
     int		   nsub;
     char 	  *replace;
     VarPatternFlags pflags;
 } ModifyWord_SubstRegexArgs;
 /* Callback for ModifyWords to implement the :C/from/to/ modifier.
  * Perform a regex substitution on the given word. */
 static void
 ModifyWord_SubstRegex(const char *word, SepBuf *buf, void *data)
+{
     ModifyWord_SubstRegexArgs *args = data;
     int xrv;
     const char *wp = word;
     char *rp;
     int flags = 0;
     regmatch_t m[10];
     if ((args->pflags & VARP_SUB_ONE) && (args->pflags & VARP_SUB_MATCHED))
 	goto nosub;
 tryagain:
     xrv = regexec(&args->re, wp, args->nsub, m, flags);
     switch (xrv) {
     case 0:
 	args->pflags |= VARP_SUB_MATCHED;
 	SepBuf_AddBytes(buf, wp, m[0].rm_so);
 	for (rp = args->replace; *rp; rp++) {
 	    if (*rp == '\\' && (rp[1] == '&' || rp[1] == '\\')) {
 		SepBuf_AddBytes(buf, rp + 1, 1);
 		rp++;
 	    } else if (*rp == '&' ||
 		(*rp == '\\' && isdigit((unsigned char)rp[1]))) {
 		int n;
 		char errstr[3];
 		if (*rp == '&') {
 		    n = 0;
 		    errstr[0] = '&';
 		    errstr[1] = '\0';
 		} else {
 		    n = rp[1] - '0';
 		    errstr[0] = '\\';
 		    errstr[1] = rp[1];
 		    errstr[2] = '\0';
 		    rp++;
+		}
 		if (n >= args->nsub) {
 		    Error("No subexpression %s", errstr);
 		} else if (m[n].rm_so == -1 && m[n].rm_eo == -1) {
 		    Error("No match for subexpression %s", errstr);
 		} else {
-		    SepBuf_AddBytes(buf, wp + m[n].rm_so,
+		    SepBuf_AddBytesBetween(buf, wp + m[n].rm_so,
-				    m[n].rm_eo - m[n].rm_so);
+					   wp + m[n].rm_eo);
+		}
 	    } else {
 		SepBuf_AddBytes(buf, rp, 1);
+	    }
+	}
 	wp += m[0].rm_eo;
 	if (args->pflags & VARP_SUB_GLOBAL) {
 	    flags |= REG_NOTBOL;
 	    if (m[0].rm_so == 0 && m[0].rm_eo == 0) {
 		SepBuf_AddBytes(buf, wp, 1);
 		wp++;
+	    }
 	    if (*wp)
 		goto tryagain;
+	}
 	if (*wp) {
-	    SepBuf_AddBytes(buf, wp, strlen(wp));
+	    SepBuf_AddStr(buf, wp);
+	}
 	break;
     default:
 	VarREError(xrv, &args->re, "Unexpected regex error");
 	/* fall through */
     case REG_NOMATCH:
     nosub:
-	SepBuf_AddBytes(buf, wp, strlen(wp));
+	SepBuf_AddStr(buf, wp);
 	break;
+    }
+}
 #endif
 typedef struct {
     GNode	*ctx;
     char	*tvar;		/* name of temporary variable */
     char	*str;		/* string to expand */
     VarEvalFlags eflags;
 } ModifyWord_LoopArgs;
 /* Callback for ModifyWords to implement the :@var@...@ modifier of ODE make. */
 static void
 ModifyWord_Loop(const char *word, SepBuf *buf, void *data)
+{
     if (word[0] == '\0')
 	return;
     const ModifyWord_LoopArgs *args = data;
     Var_Set_with_flags(args->tvar, word, args->ctx, VAR_NO_EXPORT);
     char *s = Var_Subst(NULL, args->str, args->ctx, args->eflags);
     if (DEBUG(VAR)) {
 	fprintf(debug_file,
 		"ModifyWord_Loop: in \"%s\", replace \"%s\" with \"%s\" "
 		"to \"%s\"\n",
 		word, args->tvar, args->str, s ? s : "(null)");
+    }
     if (s != NULL && s[0] != '\0') {
 	if (s[0] == '\n' || (buf->buf.count > 0 &&
 	    buf->buf.buffer[buf->buf.count - 1] == '\n'))
 	    buf->needSep = FALSE;
-	SepBuf_AddBytes(buf, s, strlen(s));
+	SepBuf_AddStr(buf, s);
+    }
     free(s);
+}
 /*-
  * Implements the :[first..last] modifier.
  * This is a special case of ModifyWords since we want to be able
  * to scan the list backwards if first > last.
  */
 static char *
 VarSelectWords(Byte sep, Boolean oneBigWord, const char *str, int first,
 	       int last)
+{
     SepBuf buf;
     char **av;			/* word list */
     char *as;			/* word list memory */
     int ac, i;
     int start, end, step;
     SepBuf_Init(&buf, sep);
     if (oneBigWord) {
 	/* fake what brk_string() would do if there were only one word */
 	ac = 1;
 	av = bmake_malloc((ac + 1) * sizeof(char *));
 	as = bmake_strdup(str);
 	av[0] = as;
 	av[1] = NULL;
     } else {
 	av = brk_string(str, &ac, FALSE, &as);
+    }
     /*
      * Now sanitize seldata.
      * If seldata->start or seldata->end are negative, convert them to
      * the positive equivalents (-1 gets converted to argc, -2 gets
      * converted to (argc-1), etc.).
      */
     if (first < 0)
 	first += ac + 1;
     if (last < 0)
 	last += ac + 1;
     /*
      * We avoid scanning more of the list than we need to.
      */
     if (first > last) {
 	start = MIN(ac, first) - 1;
 	end = MAX(0, last - 1);
 	step = -1;
     } else {
 	start = MAX(0, first - 1);
 	end = MIN(ac, last);
 	step = 1;
+    }
     for (i = start; (step < 0) == (i >= end); i += step) {
-	SepBuf_AddBytes(&buf, av[i], strlen(av[i]));
+	SepBuf_AddStr(&buf, av[i]);
 	SepBuf_Sep(&buf);
+    }
     free(as);
     free(av);
     return SepBuf_Destroy(&buf, FALSE);
+}
 /* Callback for ModifyWords to implement the :tA modifier.
  * Replace each word with the result of realpath() if successful. */
 static void
 ModifyWord_Realpath(const char *word, SepBuf *buf, void *data MAKE_ATTR_UNUSED)
+{
     struct stat st;
     char rbuf[MAXPATHLEN];
-    char *rp = cached_realpath(word, rbuf);
+    const char *rp = cached_realpath(word, rbuf);
     if (rp != NULL && *rp == '/' && stat(rp, &st) == 0)
 	word = rp;
-    SepBuf_AddBytes(buf, word, strlen(word));
+    SepBuf_AddStr(buf, word);
+}
 /*-
  *-----------------------------------------------------------------------
  * Modify each of the words of the passed string using the given function.
+ *
  * Input:
  *	str		String whose words should be modified
  *	modifyWord	Function that modifies a single word
  *	data		Custom data for modifyWord
+ *
  * Results:
  *	A string of all the words modified appropriately.
  *-----------------------------------------------------------------------
  */
 static char *
 ModifyWords(GNode *ctx, Byte sep, Boolean oneBigWord,
 	    const char *str, ModifyWordsCallback modifyWord, void *data)
+{
     SepBuf result;
     char **av;			/* word list */
     char *as;			/* word list memory */
     int ac, i;
     SepBuf_Init(&result, sep);
     if (oneBigWord) {
 	/* fake what brk_string() would do if there were only one word */
 	ac = 1;
 	av = bmake_malloc((ac + 1) * sizeof(char *));
 	as = bmake_strdup(str);
 	av[0] = as;
 	av[1] = NULL;
     } else {
 	av = brk_string(str, &ac, FALSE, &as);
+    }
     if (DEBUG(VAR)) {
 	fprintf(debug_file, "ModifyWords: split \"%s\" into %d words\n",
 		str, ac);
+    }
     for (i = 0; i < ac; i++) {
 	size_t orig_count = result.buf.count;
 	modifyWord(av[i], &result, data);
 	size_t count = result.buf.count;
 	if (count != orig_count)
 	    SepBuf_Sep(&result);
+    }
     free(as);
     free(av);
     return SepBuf_Destroy(&result, FALSE);
+}
 static int
 VarWordCompare(const void *a, const void *b)
+{
     int r = strcmp(*(const char * const *)a, *(const char * const *)b);
     return r;
+}
 static int
 VarWordCompareReverse(const void *a, const void *b)
+{
     int r = strcmp(*(const char * const *)b, *(const char * const *)a);
     return r;
+}
 /*-
  *-----------------------------------------------------------------------
  * VarOrder --
  *	Order the words in the string.
+ *
  * Input:
  *	str		String whose words should be sorted.
  *	otype		How to order: s - sort, x - random.
+ *
  * Results:
  *	A string containing the words ordered.
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 static char *
 VarOrder(const char *str, const char otype)
+{
     Buffer buf;			/* Buffer for the new string */
     char **av;			/* word list [first word does not count] */
     char *as;			/* word list memory */
     int ac, i;
     Buf_Init(&buf, 0);
     av = brk_string(str, &ac, FALSE, &as);
     if (ac > 0) {
 	switch (otype) {
 	case 'r':		/* reverse sort alphabetically */
 	    qsort(av, ac, sizeof(char *), VarWordCompareReverse);
 	    break;
 	case 's':		/* sort alphabetically */
 	    qsort(av, ac, sizeof(char *), VarWordCompare);
 	    break;
 	case 'x':		/* randomize */
+	    {
 		/*
 		 * We will use [ac..2] range for mod factors. This will produce
 		 * random numbers in [(ac-1)..0] interval, and minimal
 		 * reasonable value for mod factor is 2 (the mod 1 will produce
 		 * 0 with probability 1).
 		 */
 		for (i = ac - 1; i > 0; i--) {
 		    int rndidx = random() % (i + 1);
 		    char *t = av[i];
 		    av[i] = av[rndidx];
 		    av[rndidx] = t;
+		}
+	    }
+	}
+    }
     for (i = 0; i < ac; i++) {
 	Buf_AddStr(&buf, av[i]);
 	if (i != ac - 1)
 	    Buf_AddByte(&buf, ' ');
+    }
     free(as);
     free(av);
     return Buf_Destroy(&buf, FALSE);
+}
 /*-
  *-----------------------------------------------------------------------
  * VarUniq --
  *	Remove adjacent duplicate words.
+ *
  * Input:
  *	str		String whose words should be sorted
+ *
  * Results:
  *	A string containing the resulting words.
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 static char *
 VarUniq(const char *str)
+{
     Buffer	  buf;		/* Buffer for new string */
     char 	**av;		/* List of words to affect */
     char 	 *as;		/* Word list memory */
     int 	  ac, i, j;
     Buf_Init(&buf, 0);
     av = brk_string(str, &ac, FALSE, &as);
     if (ac > 1) {
 	for (j = 0, i = 1; i < ac; i++)
 	    if (strcmp(av[i], av[j]) != 0 && (++j != i))
 		av[j] = av[i];
 	ac = j + 1;
+    }
     for (i = 0; i < ac; i++) {
 	Buf_AddStr(&buf, av[i]);
 	if (i != ac - 1)
 	    Buf_AddByte(&buf, ' ');
+    }
     free(as);
     free(av);
     return Buf_Destroy(&buf, FALSE);
+}
 /*-
  *-----------------------------------------------------------------------
  * VarRange --
  *	Return an integer sequence
+ *
  * Input:
  *	str		String whose words provide default range
  *	ac		range length, if 0 use str words
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 static char *
 VarRange(const char *str, int ac)
+{
     Buffer	  buf;		/* Buffer for new string */
     char 	**av;		/* List of words to affect */
     char 	 *as;		/* Word list memory */
     int 	  i;
     Buf_Init(&buf, 0);
     if (ac > 0) {
 	as = NULL;
 	av = NULL;
     } else {
 	av = brk_string(str, &ac, FALSE, &as);
+    }
     for (i = 0; i < ac; i++) {
 	Buf_AddInt(&buf, 1 + i);
 	if (i != ac - 1)
 	    Buf_AddByte(&buf, ' ');
+    }
     free(as);
     free(av);
     return Buf_Destroy(&buf, FALSE);
+}
 /*-
  * Parse a text part of a modifier such as the "from" and "to" in :S/from/to/
  * or the :@ modifier. Nested variables in the text are expanded unless
  * VARE_NOSUBST is set.
+ *
  * The text part is parsed until the next delimiter.  To escape the delimiter,
  * a backslash or a dollar, put a backslash before it.
+ *
  * Return the expanded string or NULL if the delimiter was missing.
  * If pattern is specified, handle escaped ampersands and replace unescaped
  * ampersands with the lhs of the pattern (for the :S and :C modifiers).
+ *
  * If length is specified, return the string length of the buffer.
  * If mpflags is specified and the last character of the pattern is a $,
  * set the VARP_ANCHOR_END bit of mpflags.
  */
 static char *
 ParseModifierPart(GNode *ctxt, const char **tstr, int delim,
 		  VarEvalFlags eflags, VarPatternFlags *mpflags,
 		  size_t *length, ModifyWord_SubstArgs *subst)
+{
     const char *cp;
     char *rstr;
     Buffer buf;
     size_t junk;
     VarEvalFlags errnum = eflags & VARE_UNDEFERR;
     Buf_Init(&buf, 0);
     if (length == NULL)
 	length = &junk;
     /*
      * Skim through until the matching delimiter is found;
      * pick up variable substitutions on the way. Also allow
      * backslashes to quote the delimiter, $, and \, but don't
      * touch other backslashes.
      */
     for (cp = *tstr; *cp != '\0' && *cp != delim; cp++) {
 	Boolean is_escaped = cp[0] == '\\' && (cp[1] == delim ||
 	    cp[1] == '\\' || cp[1] == '$' || (subst != NULL && cp[1] == '&'));
 	if (is_escaped) {
 	    Buf_AddByte(&buf, cp[1]);
 	    cp++;
 	} else if (*cp == '$') {
 	    if (cp[1] == delim) {	/* Unescaped $ at end of pattern */
 		if (mpflags == NULL)
 		    Buf_AddByte(&buf, *cp);
 		else
 		    *mpflags |= VARP_ANCHOR_END;
 	    } else {
 		if (!(eflags & VARE_NOSUBST)) {
 		    char   *cp2;
 		    int     len;
 		    void   *freeIt;
 		    /*
 		     * If unescaped dollar sign not before the
 		     * delimiter, assume it's a variable
 		     * substitution and recurse.
 		     */
 		    cp2 = Var_Parse(cp, ctxt, errnum | (eflags & VARE_WANTRES),
 				    &len, &freeIt);
 		    Buf_AddStr(&buf, cp2);
 		    free(freeIt);
 		    cp += len - 1;
 		} else {
 		    const char *cp2 = &cp[1];
 		    if (*cp2 == PROPEN || *cp2 == BROPEN) {
 			/*
 			 * Find the end of this variable reference
 			 * and suck it in without further ado.
 			 * It will be interpreted later.
 			 */
 			int have = *cp2;
 			int want = (*cp2 == PROPEN) ? PRCLOSE : BRCLOSE;
 			int depth = 1;
 			for (++cp2; *cp2 != '\0' && depth > 0; ++cp2) {
 			    if (cp2[-1] != '\\') {
 				if (*cp2 == have)
 				    ++depth;
 				if (*cp2 == want)
 				    --depth;
+			    }
+			}
 			Buf_AddBytesBetween(&buf, cp, cp2);
 			cp = --cp2;
 		    } else
 			Buf_AddByte(&buf, *cp);
+		}
+	    }
 	} else if (subst != NULL && *cp == '&')
 	    Buf_AddBytes(&buf, subst->lhsLen, subst->lhs);
 	else
 	    Buf_AddByte(&buf, *cp);
+    }
     if (*cp != delim) {
 	*tstr = cp;
 	*length = 0;
 	return NULL;
+    }
     *tstr = ++cp;
     *length = Buf_Size(&buf);
     rstr = Buf_Destroy(&buf, FALSE);
     if (DEBUG(VAR))
 	fprintf(debug_file, "Modifier part: \"%s\"\n", rstr);
     return rstr;
+}
 /*-
  *-----------------------------------------------------------------------
  * VarQuote --
  *	Quote shell meta-characters and space characters in the string
  *	if quoteDollar is set, also quote and double any '$' characters.
+ *
  * Results:
  *	The quoted string
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 static char *
 VarQuote(char *str, Boolean quoteDollar)
+{
     Buffer buf;
     Buf_Init(&buf, 0);
     for (; *str != '\0'; str++) {
 	if (*str == '\n') {
 	    const char *newline = Shell_GetNewline();
 	    if (newline == NULL)
 		newline = "\\\n";
 	    Buf_AddStr(&buf, newline);
 	    continue;
+	}
 	if (isspace((unsigned char)*str) || ismeta((unsigned char)*str))
 	    Buf_AddByte(&buf, '\\');
 	Buf_AddByte(&buf, *str);
 	if (quoteDollar && *str == '$')
 	    Buf_AddStr(&buf, "\\$");
+    }
     str = Buf_Destroy(&buf, FALSE);
     if (DEBUG(VAR))
 	fprintf(debug_file, "QuoteMeta: [%s]\n", str);
     return str;
+}
 /*-
  *-----------------------------------------------------------------------
  * VarHash --
  *      Hash the string using the MurmurHash3 algorithm.
  *      Output is computed using 32bit Little Endian arithmetic.
+ *
  * Input:
  *	str		String to modify
+ *
  * Results:
  *      Hash value of str, encoded as 8 hex digits.
+ *
  * Side Effects:
  *      None.
+ *
  *-----------------------------------------------------------------------
  */
 static char *
 VarHash(const char *str)
+{
     static const char    hexdigits[16] = "0123456789abcdef";
     Buffer         buf;
     size_t         len, len2;
     const unsigned char *ustr = (const unsigned char *)str;
     uint32_t       h, k, c1, c2;
     h  = 0x971e137bU;
     c1 = 0x95543787U;
     c2 = 0x2ad7eb25U;
     len2 = strlen(str);
     for (len = len2; len; ) {
 	k = 0;
 	switch (len) {
 	default:
 	    k = ((uint32_t)ustr[3] << 24) |
 		((uint32_t)ustr[2] << 16) |
 		((uint32_t)ustr[1] << 8) |
 		(uint32_t)ustr[0];
 	    len -= 4;
 	    ustr += 4;
 	    break;
 	case 3:
 	    k |= (uint32_t)ustr[2] << 16;
 	    /* FALLTHROUGH */
 	case 2:
 	    k |= (uint32_t)ustr[1] << 8;
 	    /* FALLTHROUGH */
 	case 1:
 	    k |= (uint32_t)ustr[0];
 	    len = 0;
+	}
 	c1 = c1 * 5 + 0x7b7d159cU;
 	c2 = c2 * 5 + 0x6bce6396U;
 	k *= c1;
 	k = (k << 11) ^ (k >> 21);
 	k *= c2;
 	h = (h << 13) ^ (h >> 19);
 	h = h * 5 + 0x52dce729U;
 	h ^= k;
+    }
     h ^= len2;
     h *= 0x85ebca6b;
     h ^= h >> 13;
     h *= 0xc2b2ae35;
     h ^= h >> 16;
     Buf_Init(&buf, 0);
     for (len = 0; len < 8; ++len) {
 	Buf_AddByte(&buf, hexdigits[h & 15]);
 	h >>= 4;
+    }
     return Buf_Destroy(&buf, FALSE);
+}
 static char *
 VarStrftime(const char *fmt, int zulu, time_t utc)
+{
     char buf[BUFSIZ];
     if (!utc)
 	time(&utc);
     if (!*fmt)
 	fmt = "%c";
     strftime(buf, sizeof(buf), fmt, zulu ? gmtime(&utc) : localtime(&utc));
     buf[sizeof(buf) - 1] = '\0';
     return bmake_strdup(buf);
+}
 typedef struct {
     /* const parameters */
     int startc;			/* '\0' or '{' or '(' */
     int endc;
     Var *v;
     GNode *ctxt;
     VarEvalFlags eflags;
     int *lengthPtr;
     void **freePtr;
     /* read-write */
     char *nstr;
     const char *start;
     const char *cp;		/* The position where parsing continues
 				 * after the current modifier. */
     char termc;			/* Character which terminated scan */
     char missing_delim;		/* For error reporting */
     int modifier;		/* that we are processing */
     Byte	sep;		/* Word separator in expansions */
     Boolean	oneBigWord;	/* TRUE if we will treat the variable as a
 				 * single big word, even if it contains
 				 * embedded spaces (as opposed to the
 				 * usual behaviour of treating it as
 				 * several space-separated words). */
     /* result */
     char *newStr;		/* New value to return */
 } ApplyModifiersState;
 /* we now have some modifiers with long names */
 #define STRMOD_MATCH(s, want, n) \
     (strncmp(s, want, n) == 0 && (s[n] == st->endc || s[n] == ':'))
 #define STRMOD_MATCHX(s, want, n) \
     (strncmp(s, want, n) == 0 && \
      (s[n] == st->endc || s[n] == ':' || s[n] == '='))
 #define CHARMOD_MATCH(c) (c == st->endc || c == ':')
 /* :@var@...${var}...@ */
 static Boolean
 ApplyModifier_Loop(const char *mod, ApplyModifiersState *st) {
     ModifyWord_LoopArgs args;
     args.ctx = st->ctxt;
     st->cp = mod + 1;
     char delim = '@';
     args.tvar = ParseModifierPart(st->ctxt, &st->cp, delim,
 				  st->eflags | VARE_NOSUBST,
 				  NULL, NULL, NULL);
     if (args.tvar == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     args.str = ParseModifierPart(st->ctxt, &st->cp, delim,
 				 st->eflags | VARE_NOSUBST,
 				 NULL, NULL, NULL);
     if (args.str == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     st->termc = *st->cp;
     args.eflags = st->eflags & (VARE_UNDEFERR | VARE_WANTRES);
     int prev_sep = st->sep;
     st->sep = ' ';		/* XXX: this is inconsistent */
     st->newStr = ModifyWords(st->ctxt, st->sep, st->oneBigWord, st->nstr,
 			     ModifyWord_Loop, &args);
     st->sep = prev_sep;
     Var_Delete(args.tvar, st->ctxt);
     free(args.tvar);
     free(args.str);
     return TRUE;
+}
 /* :Ddefined or :Uundefined */
 static void
 ApplyModifier_Defined(const char *mod, ApplyModifiersState *st)
+{
     Buffer buf;			/* Buffer for patterns */
     VarEvalFlags neflags;
     if (st->eflags & VARE_WANTRES) {
 	Boolean wantres;
 	if (*mod == 'U')
 	    wantres = ((st->v->flags & VAR_JUNK) != 0);
 	else
 	    wantres = ((st->v->flags & VAR_JUNK) == 0);
 	neflags = st->eflags & ~VARE_WANTRES;
 	if (wantres)
 	    neflags |= VARE_WANTRES;
     } else
 	neflags = st->eflags;
     /*
      * Pass through mod looking for 1) escaped delimiters,
      * '$'s and backslashes (place the escaped character in
      * uninterpreted) and 2) unescaped $'s that aren't before
      * the delimiter (expand the variable substitution).
      * The result is left in the Buffer buf.
      */
     Buf_Init(&buf, 0);
     for (st->cp = mod + 1;
 	 *st->cp != st->endc && *st->cp != ':' && *st->cp != '\0';
 	 st->cp++) {
 	if (*st->cp == '\\' &&
 	    (st->cp[1] == ':' || st->cp[1] == '$' || st->cp[1] == st->endc ||
 	     st->cp[1] == '\\')) {
 	    Buf_AddByte(&buf, st->cp[1]);
 	    st->cp++;
 	} else if (*st->cp == '$') {
 	    /*
 	     * If unescaped dollar sign, assume it's a
 	     * variable substitution and recurse.
 	     */
 	    char    *cp2;
 	    int	    len;
 	    void    *freeIt;
 	    cp2 = Var_Parse(st->cp, st->ctxt, neflags, &len, &freeIt);
 	    Buf_AddStr(&buf, cp2);
 	    free(freeIt);
 	    st->cp += len - 1;
 	} else {
 	    Buf_AddByte(&buf, *st->cp);
+	}
+    }
     st->termc = *st->cp;
     if (st->v->flags & VAR_JUNK)
 	st->v->flags |= VAR_KEEP;
     if (neflags & VARE_WANTRES) {
 	st->newStr = Buf_Destroy(&buf, FALSE);
     } else {
 	st->newStr = st->nstr;
 	Buf_Destroy(&buf, TRUE);
+    }
+}
 /* :gmtime */
 static Boolean
 ApplyModifier_Gmtime(const char *mod, ApplyModifiersState *st)
+{
     time_t utc;
     char *ep;
     st->cp = mod + 1;		/* make sure it is set */
     if (!STRMOD_MATCHX(mod, "gmtime", 6))
 	return FALSE;
     if (mod[6] == '=') {
 	utc = strtoul(mod + 7, &ep, 10);
 	st->cp = ep;
     } else {
 	utc = 0;
 	st->cp = mod + 6;
+    }
     st->newStr = VarStrftime(st->nstr, 1, utc);
     st->termc = *st->cp;
     return TRUE;
+}
 /* :localtime */
 static Boolean
 ApplyModifier_Localtime(const char *mod, ApplyModifiersState *st)
+{
     time_t utc;
     char *ep;
     st->cp = mod + 1;	/* make sure it is set */
     if (!STRMOD_MATCHX(mod, "localtime", 9))
 	return FALSE;
     if (mod[9] == '=') {
 	utc = strtoul(mod + 10, &ep, 10);
 	st->cp = ep;
     } else {
 	utc = 0;
 	st->cp = mod + 9;
+    }
     st->newStr = VarStrftime(st->nstr, 0, utc);
     st->termc = *st->cp;
     return TRUE;
+}
 /* :hash */
 static Boolean
 ApplyModifier_Hash(const char *mod, ApplyModifiersState *st)
+{
     st->cp = mod + 1;	/* make sure it is set */
     if (!STRMOD_MATCH(mod, "hash", 4))
 	return FALSE;
     st->newStr = VarHash(st->nstr);
     st->cp = mod + 4;
     st->termc = *st->cp;
     return TRUE;
+}
 /* :P */
 static void
 ApplyModifier_Path(const char *mod, ApplyModifiersState *st)
+{
     if ((st->v->flags & VAR_JUNK) != 0)
 	st->v->flags |= VAR_KEEP;
     GNode *gn = Targ_FindNode(st->v->name, TARG_NOCREATE);
     if (gn == NULL || gn->type & OP_NOPATH) {
 	st->newStr = NULL;
     } else if (gn->path) {
 	st->newStr = bmake_strdup(gn->path);
     } else {
 	st->newStr = Dir_FindFile(st->v->name, Suff_FindPath(gn));
+    }
     if (!st->newStr)
 	st->newStr = bmake_strdup(st->v->name);
     st->cp = mod + 1;
     st->termc = *st->cp;
+}
 /* :!cmd! */
 static Boolean
 ApplyModifier_Exclam(const char *mod, ApplyModifiersState *st)
+{
     st->cp = mod + 1;
     char delim = '!';
     char *cmd = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				  NULL, NULL, NULL);
     if (cmd == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     const char *emsg = NULL;
     if (st->eflags & VARE_WANTRES)
 	st->newStr = Cmd_Exec(cmd, &emsg);
     else
 	st->newStr = varNoError;
     free(cmd);
     if (emsg)
 	Error(emsg, st->nstr);
     st->termc = *st->cp;
     if (st->v->flags & VAR_JUNK)
 	st->v->flags |= VAR_KEEP;
     return TRUE;
+}
 /* :range */
 static Boolean
 ApplyModifier_Range(const char *mod, ApplyModifiersState *st)
+{
     int n;
     char *ep;
     st->cp = mod + 1;	/* make sure it is set */
     if (!STRMOD_MATCHX(mod, "range", 5))
 	return FALSE;
     if (mod[5] == '=') {
 	n = strtoul(mod + 6, &ep, 10);
 	st->cp = ep;
     } else {
 	n = 0;
 	st->cp = mod + 5;
+    }
     st->newStr = VarRange(st->nstr, n);
     st->termc = *st->cp;
     return TRUE;
+}
 /* :Mpattern or :Npattern */
 static void
 ApplyModifier_Match(const char *mod, ApplyModifiersState *st)
+{
     Boolean copy = FALSE;	/* pattern should be, or has been, copied */
     Boolean needSubst = FALSE;
     /*
      * In the loop below, ignore ':' unless we are at (or back to) the
      * original brace level.
      * XXX This will likely not work right if $() and ${} are intermixed.
      */
     int nest = 1;
     for (st->cp = mod + 1;
 	 *st->cp != '\0' && !(*st->cp == ':' && nest == 1);
 	 st->cp++) {
 	if (*st->cp == '\\' &&
 	    (st->cp[1] == ':' || st->cp[1] == st->endc ||
 	     st->cp[1] == st->startc)) {
 	    if (!needSubst)
 		copy = TRUE;
 	    st->cp++;
 	    continue;
+	}
 	if (*st->cp == '$')
 	    needSubst = TRUE;
 	if (*st->cp == '(' || *st->cp == '{')
 	    ++nest;
 	if (*st->cp == ')' || *st->cp == '}') {
 	    --nest;
 	    if (nest == 0)
 		break;
+	}
+    }
     st->termc = *st->cp;
     const char *endpat = st->cp;
     char *pattern = NULL;
     if (copy) {
 	/*
 	 * Need to compress the \:'s out of the pattern, so
 	 * allocate enough room to hold the uncompressed
 	 * pattern (note that st->cp started at mod+1, so
 	 * st->cp - mod takes the null byte into account) and
 	 * compress the pattern into the space.
 	 */
 	pattern = bmake_malloc(st->cp - mod);
 	char *cp2;
 	for (cp2 = pattern, st->cp = mod + 1;
 	     st->cp < endpat;
 	     st->cp++, cp2++) {
 	    if ((*st->cp == '\\') && (st->cp+1 < endpat) &&
 		(st->cp[1] == ':' || st->cp[1] == st->endc))
 		st->cp++;
 	    *cp2 = *st->cp;
+	}
 	*cp2 = '\0';
 	endpat = cp2;
     } else {
 	/*
 	 * Either Var_Subst or ModifyWords will need a
 	 * nul-terminated string soon, so construct one now.
 	 */
 	pattern = bmake_strndup(mod + 1, endpat - (mod + 1));
+    }
     if (needSubst) {
 	/* pattern contains embedded '$', so use Var_Subst to expand it. */
 	char *old_pattern = pattern;
 	pattern = Var_Subst(NULL, pattern, st->ctxt, st->eflags);
 	free(old_pattern);
+    }
     if (DEBUG(VAR))
 	fprintf(debug_file, "Pattern[%s] for [%s] is [%s]\n",
 	    st->v->name, st->nstr, pattern);
     ModifyWordsCallback callback = mod[0] == 'M'
 	? ModifyWord_Match : ModifyWord_NoMatch;
     st->newStr = ModifyWords(st->ctxt, st->sep, st->oneBigWord, st->nstr,
 			     callback, pattern);
     free(pattern);
+}
 /* :S,from,to, */
 static Boolean
 ApplyModifier_Subst(const char * const mod, ApplyModifiersState *st)
+{
     ModifyWord_SubstArgs args;
     Boolean oneBigWord = st->oneBigWord;
     char delim = mod[1];
     st->cp = mod + 2;
     /*
      * If pattern begins with '^', it is anchored to the
      * start of the word -- skip over it and flag pattern.
      */
     args.pflags = 0;
     if (*st->cp == '^') {
 	args.pflags |= VARP_ANCHOR_START;
 	st->cp++;
+    }
     char *lhs = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				  &args.pflags, &args.lhsLen, NULL);
     if (lhs == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     args.lhs = lhs;
     char *rhs = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				  NULL, &args.rhsLen, &args);
     if (rhs == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     args.rhs = rhs;
     /*
      * Check for global substitution. If 'g' after the final
      * delimiter, substitution is global and is marked that
      * way.
      */
     for (;; st->cp++) {
 	switch (*st->cp) {
 	case 'g':
 	    args.pflags |= VARP_SUB_GLOBAL;
 	    continue;
 	case '1':
 	    args.pflags |= VARP_SUB_ONE;
 	    continue;
 	case 'W':
 	    oneBigWord = TRUE;
 	    continue;
+	}
 	break;
+    }
     st->termc = *st->cp;
     st->newStr = ModifyWords(st->ctxt, st->sep, oneBigWord, st->nstr,
 			     ModifyWord_Subst, &args);
     free(lhs);
     free(rhs);
     return TRUE;
+}
 #ifndef NO_REGEX
 /* :C,from,to, */
 static Boolean
 ApplyModifier_Regex(const char *mod, ApplyModifiersState *st)
+{
     ModifyWord_SubstRegexArgs args;
     args.pflags = 0;
     Boolean oneBigWord = st->oneBigWord;
     char delim = mod[1];
     st->cp = mod + 2;
     char *re = ParseModifierPart(st->ctxt, &st->cp, delim,
 				 st->eflags, NULL, NULL, NULL);
     if (re == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     args.replace = ParseModifierPart(st->ctxt, &st->cp, delim,
 				     st->eflags, NULL, NULL, NULL);
     if (args.replace == NULL) {
 	free(re);
 	st->missing_delim = delim;
 	return FALSE;
+    }
     for (;; st->cp++) {
 	switch (*st->cp) {
 	case 'g':
 	    args.pflags |= VARP_SUB_GLOBAL;
 	    continue;
 	case '1':
 	    args.pflags |= VARP_SUB_ONE;
 	    continue;
 	case 'W':
 	    oneBigWord = TRUE;
 	    continue;
+	}
 	break;
+    }
     st->termc = *st->cp;
     int error = regcomp(&args.re, re, REG_EXTENDED);
     free(re);
     if (error) {
 	*st->lengthPtr = st->cp - st->start + 1;
 	VarREError(error, &args.re, "RE substitution error");
 	free(args.replace);
 	return FALSE;
+    }
     args.nsub = args.re.re_nsub + 1;
     if (args.nsub < 1)
 	args.nsub = 1;
     if (args.nsub > 10)
 	args.nsub = 10;
     st->newStr = ModifyWords(st->ctxt, st->sep, oneBigWord, st->nstr,
 			     ModifyWord_SubstRegex, &args);
     regfree(&args.re);
     free(args.replace);
     return TRUE;
+}
 #endif
 static void
 ModifyWord_Copy(const char *word, SepBuf *buf, void *data MAKE_ATTR_UNUSED)
+{
-    SepBuf_AddBytes(buf, word, strlen(word));
+    SepBuf_AddStr(buf, word);
+}
 /* :ts<separator> */
 static Boolean
 ApplyModifier_ToSep(const char *sep, ApplyModifiersState *st)
+{
     if (sep[0] != st->endc && (sep[1] == st->endc || sep[1] == ':')) {
 	/* ":ts<unrecognised><endc>" or ":ts<unrecognised>:" */
 	st->sep = sep[0];
 	st->cp = sep + 1;
     } else if (sep[0] == st->endc || sep[0] == ':') {
 	/* ":ts<endc>" or ":ts:" */
 	st->sep = '\0';		/* no separator */
 	st->cp = sep;
     } else if (sep[0] == '\\') {
 	const char *xp = sep + 1;
 	int base = 8;		/* assume octal */
 	switch (sep[1]) {
 	case 'n':
 	    st->sep = '\n';
 	    st->cp = sep + 2;
 	    break;
 	case 't':
 	    st->sep = '\t';
 	    st->cp = sep + 2;
 	    break;
 	case 'x':
 	    base = 16;
 	    xp++;
 	    goto get_numeric;
 	case '0':
 	    base = 0;
 	    goto get_numeric;
 	default:
 	    if (!isdigit((unsigned char)sep[1]))
 		return FALSE;	/* ":ts<backslash><unrecognised>". */
 	    char *end;
 	get_numeric:
 	    st->sep = strtoul(sep + 1 + (sep[1] == 'x'), &end, base);
 	    if (*end != ':' && *end != st->endc)
 	        return FALSE;
 	    st->cp = end;
 	    break;
+	}
     } else {
 	return FALSE;		/* Found ":ts<unrecognised><unrecognised>". */
+    }
     st->termc = *st->cp;
     st->newStr = ModifyWords(st->ctxt, st->sep, st->oneBigWord, st->nstr,
 			     ModifyWord_Copy, NULL);
     return TRUE;
+}
 /* :tA, :tu, :tl, :ts<separator>, etc. */
 static Boolean
 ApplyModifier_To(const char *mod, ApplyModifiersState *st)
+{
     st->cp = mod + 1;	/* make sure it is set */
     if (mod[1] == st->endc || mod[1] == ':')
 	return FALSE;		/* Found ":t<endc>" or ":t:". */
     if (mod[1] == 's')
 	return ApplyModifier_ToSep(mod + 2, st);
     if (mod[2] != st->endc && mod[2] != ':')
 	return FALSE;		/* Found ":t<unrecognised><unrecognised>". */
     /* Check for two-character options: ":tu", ":tl" */
     if (mod[1] == 'A') {	/* absolute path */
 	st->newStr = ModifyWords(st->ctxt, st->sep, st->oneBigWord, st->nstr,
 				 ModifyWord_Realpath, NULL);
 	st->cp = mod + 2;
 	st->termc = *st->cp;
     } else if (mod[1] == 'u') {
 	char *dp = bmake_strdup(st->nstr);
 	for (st->newStr = dp; *dp; dp++)
 	    *dp = toupper((unsigned char)*dp);
 	st->cp = mod + 2;
 	st->termc = *st->cp;
     } else if (mod[1] == 'l') {
 	char *dp = bmake_strdup(st->nstr);
 	for (st->newStr = dp; *dp; dp++)
 	    *dp = tolower((unsigned char)*dp);
 	st->cp = mod + 2;
 	st->termc = *st->cp;
     } else if (mod[1] == 'W' || mod[1] == 'w') {
 	st->oneBigWord = mod[1] == 'W';
 	st->newStr = st->nstr;
 	st->cp = mod + 2;
 	st->termc = *st->cp;
     } else {
 	/* Found ":t<unrecognised>:" or ":t<unrecognised><endc>". */
 	return FALSE;
+    }
     return TRUE;
+}
 /* :[#], :[1], etc. */
 static int
 ApplyModifier_Words(const char *mod, ApplyModifiersState *st)
+{
     st->cp = mod + 1;	/* point to char after '[' */
     char delim = ']';		/* look for closing ']' */
     char *estr = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				   NULL, NULL, NULL);
     if (estr == NULL) {
 	st->missing_delim = delim;
 	return 'c';
+    }
     /* now st->cp points just after the closing ']' */
     if (st->cp[0] != ':' && st->cp[0] != st->endc)
 	goto bad_modifier;	/* Found junk after ']' */
     if (estr[0] == '\0')
 	goto bad_modifier;	/* empty square brackets in ":[]". */
     if (estr[0] == '#' && estr[1] == '\0') { /* Found ":[#]" */
 	if (st->oneBigWord) {
 	    st->newStr = bmake_strdup("1");
 	} else {
 	    /* XXX: brk_string() is a rather expensive
 	     * way of counting words. */
 	    char *as;
 	    int ac;
 	    char **av = brk_string(st->nstr, &ac, FALSE, &as);
 	    free(as);
 	    free(av);
 	    Buffer buf;
 	    Buf_Init(&buf, 4);	/* 3 digits + '\0' */
 	    Buf_AddInt(&buf, ac);
 	    st->newStr = Buf_Destroy(&buf, FALSE);
+	}
 	goto ok;
+    }
     if (estr[0] == '*' && estr[1] == '\0') {
 	/* Found ":[*]" */
 	st->oneBigWord = TRUE;
 	st->newStr = st->nstr;
 	goto ok;
+    }
     if (estr[0] == '@' && estr[1] == '\0') {
 	/* Found ":[@]" */
 	st->oneBigWord = FALSE;
 	st->newStr = st->nstr;
 	goto ok;
+    }
     /*
      * We expect estr to contain a single integer for :[N], or two integers
      * separated by ".." for :[start..end].
      */
     char *ep;
     int first = strtol(estr, &ep, 0);
     int last;
     if (ep == estr)		/* Found junk instead of a number */
 	goto bad_modifier;
     if (ep[0] == '\0') {	/* Found only one integer in :[N] */
 	last = first;
     } else if (ep[0] == '.' && ep[1] == '.' && ep[2] != '\0') {
 	/* Expecting another integer after ".." */
 	ep += 2;
 	last = strtol(ep, &ep, 0);
 	if (ep[0] != '\0')	/* Found junk after ".." */
 	    goto bad_modifier;
     } else
 	goto bad_modifier;	/* Found junk instead of ".." */
     /*
      * Now seldata is properly filled in, but we still have to check for 0 as
      * a special case.
      */
     if (first == 0 && last == 0) {
 	/* ":[0]" or perhaps ":[0..0]" */
 	st->oneBigWord = TRUE;
 	st->newStr = st->nstr;
 	goto ok;
+    }
     /* ":[0..N]" or ":[N..0]" */
     if (first == 0 || last == 0)
 	goto bad_modifier;
     /* Normal case: select the words described by seldata. */
     st->newStr = VarSelectWords(st->sep, st->oneBigWord, st->nstr, first, last);
 ok:
     st->termc = *st->cp;
     free(estr);
     return 0;
 bad_modifier:
     free(estr);
     return 'b';
+}
 /* :O or :Ox */
 static Boolean
 ApplyModifier_Order(const char *mod, ApplyModifiersState *st)
+{
     char otype;
     st->cp = mod + 1;	/* skip to the rest in any case */
     if (mod[1] == st->endc || mod[1] == ':') {
 	otype = 's';
 	st->termc = *st->cp;
     } else if ((mod[1] == 'r' || mod[1] == 'x') &&
 	       (mod[2] == st->endc || mod[2] == ':')) {
 	otype = mod[1];
 	st->cp = mod + 2;
 	st->termc = *st->cp;
     } else {
 	return FALSE;
+    }
     st->newStr = VarOrder(st->nstr, otype);
     return TRUE;
+}
 /* :? then : else */
 static Boolean
 ApplyModifier_IfElse(const char *mod, ApplyModifiersState *st)
+{
     Boolean value = FALSE;
     int cond_rc = 0;
     VarEvalFlags then_eflags = st->eflags & ~VARE_WANTRES;
     VarEvalFlags else_eflags = st->eflags & ~VARE_WANTRES;
     if (st->eflags & VARE_WANTRES) {
 	cond_rc = Cond_EvalExpression(NULL, st->v->name, &value, 0, FALSE);
 	if (cond_rc != COND_INVALID && value)
 	    then_eflags |= VARE_WANTRES;
 	if (cond_rc != COND_INVALID && !value)
 	    else_eflags |= VARE_WANTRES;
+    }
     st->cp = mod + 1;
     char delim = ':';
     char *then_expr = ParseModifierPart(
 	st->ctxt, &st->cp, delim, then_eflags, NULL, NULL, NULL);
     if (then_expr == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     delim = st->endc;		/* BRCLOSE or PRCLOSE */
     char *else_expr = ParseModifierPart(
 	st->ctxt, &st->cp, delim, else_eflags, NULL, NULL, NULL);
     if (else_expr == NULL) {
 	st->missing_delim = delim;
 	return FALSE;
+    }
     st->termc = *--st->cp;
     if (cond_rc == COND_INVALID) {
 	Error("Bad conditional expression `%s' in %s?%s:%s",
 	    st->v->name, st->v->name, then_expr, else_expr);
 	return FALSE;
+    }
     if (value) {
 	st->newStr = then_expr;
 	free(else_expr);
     } else {
 	st->newStr = else_expr;
 	free(then_expr);
+    }
     if (st->v->flags & VAR_JUNK)
 	st->v->flags |= VAR_KEEP;
     return TRUE;
+}
 /*
  * The ::= modifiers actually assign a value to the variable.
  * Their main purpose is in supporting modifiers of .for loop
  * iterators and other obscure uses.  They always expand to
  * nothing.  In a target rule that would otherwise expand to an
  * empty line they can be preceded with @: to keep make happy.
  * Eg.
+ *
  * foo:	.USE
  * .for i in ${.TARGET} ${.TARGET:R}.gz
  * 	@: ${t::=$i}
  *	@echo blah ${t:T}
  * .endfor
+ *
  *	  ::=<str>	Assigns <str> as the new value of variable.
  *	  ::?=<str>	Assigns <str> as value of variable if
  *			it was not already set.
  *	  ::+=<str>	Appends <str> to variable.
  *	  ::!=<cmd>	Assigns output of <cmd> as the new value of
  *			variable.
  */
 static int
 ApplyModifier_Assign(const char *mod, ApplyModifiersState *st)
+{
     const char *op = mod + 1;
     if (!(op[0] == '=' ||
 	(op[1] == '=' &&
 	 (op[0] == '!' || op[0] == '+' || op[0] == '?'))))
 	return 'd';		/* "::<unrecognised>" */
     GNode *v_ctxt;		/* context where v belongs */
     if (st->v->name[0] == 0)
 	return 'b';
     v_ctxt = st->ctxt;
     char *sv_name = NULL;
     if (st->v->flags & VAR_JUNK) {
 	/*
 	 * We need to bmake_strdup() it incase ParseModifierPart() recurses.
 	 */
 	sv_name = st->v->name;
 	st->v->name = bmake_strdup(st->v->name);
     } else if (st->ctxt != VAR_GLOBAL) {
 	Var *gv = VarFind(st->v->name, st->ctxt, 0);
 	if (gv == NULL)
 	    v_ctxt = VAR_GLOBAL;
 	else
 	    VarFreeEnv(gv, TRUE);
+    }
     switch (op[0]) {
     case '+':
     case '?':
     case '!':
 	st->cp = mod + 3;
 	break;
     default:
 	st->cp = mod + 2;
 	break;
+    }
     char delim = st->startc == PROPEN ? PRCLOSE : BRCLOSE;
     VarEvalFlags eflags = (st->eflags & VARE_WANTRES) ? 0 : VARE_NOSUBST;
     char *val = ParseModifierPart(st->ctxt, &st->cp, delim,
 				  st->eflags | eflags, NULL, NULL, NULL);
     if (st->v->flags & VAR_JUNK) {
 	/* restore original name */
 	free(st->v->name);
 	st->v->name = sv_name;
+    }
     if (val == NULL) {
 	st->missing_delim = delim;
 	return 'c';
+    }
     st->termc = *--st->cp;
     if (st->eflags & VARE_WANTRES) {
 	switch (op[0]) {
 	case '+':
 	    Var_Append(st->v->name, val, v_ctxt);
 	    break;
 	case '!': {
 	    const char *emsg;
 	    st->newStr = Cmd_Exec(val, &emsg);
 	    if (emsg)
 		Error(emsg, st->nstr);
 	    else
 		Var_Set(st->v->name, st->newStr, v_ctxt);
 	    free(st->newStr);
 	    break;
+	}
 	case '?':
 	    if ((st->v->flags & VAR_JUNK) == 0)
 		break;
 	    /* FALLTHROUGH */
 	default:
 	    Var_Set(st->v->name, val, v_ctxt);
 	    break;
+	}
+    }
     free(val);
     st->newStr = varNoError;
     return 0;
+}
 /* remember current value */
 static Boolean
 ApplyModifier_Remember(const char *mod, ApplyModifiersState *st)
+{
     st->cp = mod + 1;	/* make sure it is set */
     if (!STRMOD_MATCHX(mod, "_", 1))
 	return FALSE;
     if (mod[1] == '=') {
 	char *np;
 	int n;
 	st->cp++;
 	n = strcspn(st->cp, ":)}");
 	np = bmake_strndup(st->cp, n + 1);
 	np[n] = '\0';
 	st->cp = mod + 2 + n;
 	Var_Set(np, st->nstr, st->ctxt);
 	free(np);
     } else {
 	Var_Set("_", st->nstr, st->ctxt);
+    }
     st->newStr = st->nstr;
     st->termc = *st->cp;
     return TRUE;
+}
 #ifdef SYSVVARSUB
 /* :from=to */
 static int
 ApplyModifier_SysV(const char *mod, ApplyModifiersState *st)
+{
     Boolean eqFound = FALSE;
     /*
      * First we make a pass through the string trying
      * to verify it is a SYSV-make-style translation:
      * it must be: <string1>=<string2>)
      */
     st->cp = mod;
     int nest = 1;
     while (*st->cp != '\0' && nest > 0) {
 	if (*st->cp == '=') {
 	    eqFound = TRUE;
 	    /* continue looking for st->endc */
 	} else if (*st->cp == st->endc)
 	    nest--;
 	else if (*st->cp == st->startc)
 	    nest++;
 	if (nest > 0)
 	    st->cp++;
+    }
     if (*st->cp != st->endc || !eqFound)
 	return 0;
     char delim = '=';
     st->cp = mod;
     char *lhs = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				  NULL, NULL, NULL);
     if (lhs == NULL) {
 	st->missing_delim = delim;
 	return 'c';
+    }
     delim = st->endc;
     char *rhs = ParseModifierPart(st->ctxt, &st->cp, delim, st->eflags,
 				  NULL, NULL, NULL);
     if (rhs == NULL) {
 	st->missing_delim = delim;
 	return 'c';
+    }
     /*
      * SYSV modifications happen through the whole
      * string. Note the pattern is anchored at the end.
      */
     st->termc = *--st->cp;
     if (lhs[0] == '\0' && *st->nstr == '\0') {
 	st->newStr = st->nstr;	/* special case */
     } else {
 	ModifyWord_SYSVSubstArgs args = { st->ctxt, lhs, rhs };
 	st->newStr = ModifyWords(st->ctxt, st->sep, st->oneBigWord, st->nstr,
 				 ModifyWord_SYSVSubst, &args);
+    }
     free(lhs);
     free(rhs);
     return '=';
+}
 #endif
 /*
  * Now we need to apply any modifiers the user wants applied.
  * These are:
  *  	  :M<pattern>	words which match the given <pattern>.
  *  			<pattern> is of the standard file
  *  			wildcarding form.
  *  	  :N<pattern>	words which do not match the given <pattern>.
  *  	  :S<d><pat1><d><pat2><d>[1gW]
  *  			Substitute <pat2> for <pat1> in the value
  *  	  :C<d><pat1><d><pat2><d>[1gW]
  *  			Substitute <pat2> for regex <pat1> in the value
  *  	  :H		Substitute the head of each word
  *  	  :T		Substitute the tail of each word
  *  	  :E		Substitute the extension (minus '.') of
  *  			each word
  *  	  :R		Substitute the root of each word
  *  			(pathname minus the suffix).
  *	  :O		("Order") Alphabeticaly sort words in variable.
  *	  :Ox		("intermiX") Randomize words in variable.
  *	  :u		("uniq") Remove adjacent duplicate words.
  *	  :tu		Converts the variable contents to uppercase.
  *	  :tl		Converts the variable contents to lowercase.
  *	  :ts[c]	Sets varSpace - the char used to
  *			separate words to 'c'. If 'c' is
  *			omitted then no separation is used.
  *	  :tW		Treat the variable contents as a single
  *			word, even if it contains spaces.
  *			(Mnemonic: one big 'W'ord.)
  *	  :tw		Treat the variable contents as multiple
  *			space-separated words.
  *			(Mnemonic: many small 'w'ords.)
  *	  :[index]	Select a single word from the value.
  *	  :[start..end]	Select multiple words from the value.
  *	  :[*] or :[0]	Select the entire value, as a single
  *			word.  Equivalent to :tW.
  *	  :[@]		Select the entire value, as multiple
  *			words.	Undoes the effect of :[*].
  *			Equivalent to :tw.
  *	  :[#]		Returns the number of words in the value.
+ *
  *	  :?<true-value>:<false-value>
  *			If the variable evaluates to true, return
  *			true value, else return the second value.
  *    	  :lhs=rhs  	Like :S, but the rhs goes to the end of
  *    			the invocation.
  *	  :sh		Treat the current value as a command
  *			to be run, new value is its output.
  * The following added so we can handle ODE makefiles.
  *	  :@<tmpvar>@<newval>@
  *			Assign a temporary local variable <tmpvar>
  *			to the current value of each word in turn
  *			and replace each word with the result of
  *			evaluating <newval>
  *	  :D<newval>	Use <newval> as value if variable defined
  *	  :U<newval>	Use <newval> as value if variable undefined
  *	  :L		Use the name of the variable as the value.
  *	  :P		Use the path of the node that has the same
  *			name as the variable as the value.  This
  *			basically includes an implied :L so that
  *			the common method of refering to the path
  *			of your dependent 'x' in a rule is to use
  *			the form '${x:P}'.
  *	  :!<cmd>!	Run cmd much the same as :sh run's the
  *			current value of the variable.
  * Assignment operators (see ApplyModifier_Assign).
  */
 static char *
 ApplyModifiers(char *nstr, const char *tstr,
 	       int const startc, int const endc,
 	       Var * const v, GNode * const ctxt, VarEvalFlags const eflags,
 	       int * const lengthPtr, void ** const freePtr)
+{
     ApplyModifiersState st = {
 	startc, endc, v, ctxt, eflags, lengthPtr, freePtr,
 	nstr, tstr, tstr,
 	'\0', '\0', 0, ' ', FALSE, NULL
     };
     const char *p = tstr;
     while (*p != '\0' && *p != endc) {
 	if (*p == '$') {
 	    /*
 	     * We may have some complex modifiers in a variable.
 	     */
 	    void *freeIt;
 	    char *rval;
 	    int rlen;
 	    int c;
 	    rval = Var_Parse(p, st.ctxt, st.eflags, &rlen, &freeIt);
 	    /*
 	     * If we have not parsed up to st.endc or ':',
 	     * we are not interested.
 	     */
 	    if (rval != NULL && *rval &&
 		(c = p[rlen]) != '\0' &&
 		c != ':' &&
 		c != st.endc) {
 		free(freeIt);
 		goto apply_mods;
+	    }
 	    if (DEBUG(VAR)) {
 		fprintf(debug_file, "Got '%s' from '%.*s'%.*s\n",
 		       rval, rlen, p, rlen, p + rlen);
+	    }
 	    p += rlen;
 	    if (rval != NULL && *rval) {
 		int used;
 		st.nstr = ApplyModifiers(st.nstr, rval, 0, 0, st.v,
 				      st.ctxt, st.eflags, &used, st.freePtr);
 		if (st.nstr == var_Error
 		    || (st.nstr == varNoError && (st.eflags & VARE_UNDEFERR) == 0)
 		    || strlen(rval) != (size_t) used) {
 		    free(freeIt);
 		    goto out;	/* error already reported */
+		}
+	    }
 	    free(freeIt);
 	    if (*p == ':')
 		p++;
 	    else if (*p == '\0' && endc != '\0') {
 		Error("Unclosed variable specification after complex "
 		    "modifier (expecting '%c') for %s", st.endc, st.v->name);
 		goto out;
+	    }
 	    continue;
+	}
     apply_mods:
 	if (DEBUG(VAR)) {
 	    fprintf(debug_file, "Applying[%s] :%c to \"%s\"\n", st.v->name,
 		*p, st.nstr);
+	}
 	st.newStr = var_Error;
 	switch ((st.modifier = *p)) {
 	case ':':
+	    {
 		int res = ApplyModifier_Assign(p, &st);
 		if (res == 'b')
 		    goto bad_modifier;
 		if (res == 'c')
 		    goto cleanup;
 		if (res == 'd')
 		    goto default_case;
 		break;
+	    }
 	case '@':
 	    if (!ApplyModifier_Loop(p, &st))
 		goto cleanup;
 	    break;
 	case '_':
 	    if (!ApplyModifier_Remember(p, &st))
 		goto default_case;
 	    break;
 	case 'D':
 	case 'U':
 	    ApplyModifier_Defined(p, &st);
 	    break;
 	case 'L':
+	    {
 		if ((st.v->flags & VAR_JUNK) != 0)
 		    st.v->flags |= VAR_KEEP;
 		st.newStr = bmake_strdup(st.v->name);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	case 'P':
 	    ApplyModifier_Path(p, &st);
 	    break;
 	case '!':
 	    if (!ApplyModifier_Exclam(p, &st))
 		goto cleanup;
 	    break;
 	case '[':
+	    {
 		int res = ApplyModifier_Words(p, &st);
 		if (res == 'b')
 		    goto bad_modifier;
 		if (res == 'c')
 		    goto cleanup;
 		break;
+	    }
 	case 'g':
 	    if (!ApplyModifier_Gmtime(p, &st))
 		goto default_case;
 	    break;
 	case 'h':
 	    if (!ApplyModifier_Hash(p, &st))
 		goto default_case;
 	    break;
 	case 'l':
 	    if (!ApplyModifier_Localtime(p, &st))
 		goto default_case;
 	    break;
 	case 't':
 	    if (!ApplyModifier_To(p, &st))
 		goto bad_modifier;
 	    break;
 	case 'N':
 	case 'M':
 	    ApplyModifier_Match(p, &st);
 	    break;
 	case 'S':
 	    if (!ApplyModifier_Subst(p, &st))
 		goto cleanup;
 	    break;
 	case '?':
 	    if (!ApplyModifier_IfElse(p, &st))
 		goto cleanup;
 	    break;
 #ifndef NO_REGEX
 	case 'C':
 	    if (!ApplyModifier_Regex(p, &st))
 		goto cleanup;
 	    break;
 #endif
 	case 'q':
 	case 'Q':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = VarQuote(st.nstr, st.modifier == 'q');
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 	case 'T':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = ModifyWords(st.ctxt, st.sep, st.oneBigWord,
 					st.nstr, ModifyWord_Tail, NULL);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 	case 'H':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = ModifyWords(st.ctxt, st.sep, st.oneBigWord,
 					st.nstr, ModifyWord_Head, NULL);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 	case 'E':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = ModifyWords(st.ctxt, st.sep, st.oneBigWord,
 					st.nstr, ModifyWord_Suffix, NULL);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 	case 'R':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = ModifyWords(st.ctxt, st.sep, st.oneBigWord,
 					st.nstr, ModifyWord_Root, NULL);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 	case 'r':
 	    if (!ApplyModifier_Range(p, &st))
 		goto default_case;
 	    break;
 	case 'O':
 	    if (!ApplyModifier_Order(p, &st))
 		goto bad_modifier;
 	    break;
 	case 'u':
 	    if (p[1] == st.endc || p[1] == ':') {
 		st.newStr = VarUniq(st.nstr);
 		st.cp = p + 1;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 #ifdef SUNSHCMD
 	case 's':
 	    if (p[1] == 'h' && (p[2] == st.endc || p[2] == ':')) {
 		const char *emsg;
 		if (st.eflags & VARE_WANTRES) {
 		    st.newStr = Cmd_Exec(st.nstr, &emsg);
 		    if (emsg)
 			Error(emsg, st.nstr);
 		} else
 		    st.newStr = varNoError;
 		st.cp = p + 2;
 		st.termc = *st.cp;
 		break;
+	    }
 	    goto default_case;
 #endif
 	default:
 	default_case:
+	    {
 #ifdef SYSVVARSUB
 		int res = ApplyModifier_SysV(p, &st);
 		if (res == 'c')
 		    goto cleanup;
 		if (res != '=')
 #endif
+		{
 		    Error("Unknown modifier '%c'", *p);
 		    for (st.cp = p + 1;
 			 *st.cp != ':' && *st.cp != st.endc && *st.cp != '\0';
 			 st.cp++)
 			continue;
 		    st.termc = *st.cp;
 		    st.newStr = var_Error;
+		}
+	    }
+	}
 	if (DEBUG(VAR)) {
 	    fprintf(debug_file, "Result[%s] of :%c is \"%s\"\n",
 		st.v->name, st.modifier, st.newStr);
+	}
 	if (st.newStr != st.nstr) {
 	    if (*st.freePtr) {
 		free(st.nstr);
 		*st.freePtr = NULL;
+	    }
 	    st.nstr = st.newStr;
 	    if (st.nstr != var_Error && st.nstr != varNoError) {
 		*st.freePtr = st.nstr;
+	    }
+	}
 	if (st.termc == '\0' && st.endc != '\0') {
 	    Error("Unclosed variable specification (expecting '%c') "
 		"for \"%s\" (value \"%s\") modifier %c",
 		st.endc, st.v->name, st.nstr, st.modifier);
 	} else if (st.termc == ':') {
 	    st.cp++;
+	}
 	p = st.cp;
+    }
 out:
     *st.lengthPtr = p - st.start;
     return st.nstr;
 bad_modifier:
     Error("Bad modifier `:%.*s' for %s",
 	  (int)strcspn(p, ":)}"), p, st.v->name);
 cleanup:
     *st.lengthPtr = st.cp - st.start;
     if (st.missing_delim != '\0')
 	Error("Unclosed substitution for %s (%c missing)",
 	      st.v->name, st.missing_delim);
     free(*st.freePtr);
     *st.freePtr = NULL;
     return var_Error;
+}
 /*-
  *-----------------------------------------------------------------------
  * Var_Parse --
  *	Given the start of a variable invocation, extract the variable
  *	name and find its value, then modify it according to the
  *	specification.
+ *
  * Input:
  *	str		The string to parse
  *	ctxt		The context for the variable
  *	flags		VARE_UNDEFERR	if undefineds are an error
  *			VARE_WANTRES	if we actually want the result
  *			VARE_ASSIGN	if we are in a := assignment
  *	lengthPtr	OUT: The length of the specification
  *	freePtr		OUT: Non-NULL if caller should free *freePtr
+ *
  * Results:
  *	The (possibly-modified) value of the variable or var_Error if the
  *	specification is invalid. The length of the specification is
  *	placed in *lengthPtr (for invalid specifications, this is just
  *	2...?).
  *	If *freePtr is non-NULL then it's a pointer that the caller
  *	should pass to free() to free memory used by the result.
+ *
  * Side Effects:
  *	None.
+ *
  *-----------------------------------------------------------------------
  */
 /* coverity[+alloc : arg-*4] */
 char *
 Var_Parse(const char *str, GNode *ctxt, VarEvalFlags flags,
 	  int *lengthPtr, void **freePtr)
+{
     const char	*tstr;		/* Pointer into str */
     Var		*v;		/* Variable in invocation */
     Boolean 	 haveModifier;	/* TRUE if have modifiers for the variable */
     char	 endc;		/* Ending character when variable in parens
 				 * or braces */
     char	 startc;	/* Starting character when variable in parens
 				 * or braces */
     int		 vlen;		/* Length of variable name */
     const char 	*start;		/* Points to original start of str */
     char	*nstr;		/* New string, used during expansion */
     Boolean	 dynamic;	/* TRUE if the variable is local and we're
 				 * expanding it in a non-local context. This
 				 * is done to support dynamic sources. The
 				 * result is just the invocation, unaltered */
     const char	*extramodifiers; /* extra modifiers to apply first */
     char	 name[2];
     *freePtr = NULL;
     extramodifiers = NULL;
     dynamic = FALSE;
     start = str;
     startc = str[1];
     if (startc != PROPEN && startc != BROPEN) {
 	/*
 	 * If it's not bounded by braces of some sort, life is much simpler.
 	 * We just need to check for the first character and return the
 	 * value if it exists.
 	 */
 	/* Error out some really stupid names */
 	if (startc == '\0' || strchr(")}:$", startc)) {
 	    *lengthPtr = 1;
 	    return var_Error;
+	}
 	name[0] = startc;
 	name[1] = '\0';
 	v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
 	if (v == NULL) {
 	    *lengthPtr = 2;
 	    if ((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)) {
 		/*
 		 * If substituting a local variable in a non-local context,
 		 * assume it's for dynamic source stuff. We have to handle
 		 * this specially and return the longhand for the variable
 		 * with the dollar sign escaped so it makes it back to the
 		 * caller. Only four of the local variables are treated
 		 * specially as they are the only four that will be set
 		 * when dynamic sources are expanded.
 		 */
 		switch (str[1]) {
 		case '@':
 		    return UNCONST("$(.TARGET)");
 		case '%':
 		    return UNCONST("$(.MEMBER)");
 		case '*':
 		    return UNCONST("$(.PREFIX)");
 		case '!':
 		    return UNCONST("$(.ARCHIVE)");
+		}
+	    }
 	    return (flags & VARE_UNDEFERR) ? var_Error : varNoError;
 	} else {
 	    haveModifier = FALSE;
 	    tstr = &str[1];
 	    endc = str[1];
+	}
     } else {
 	Buffer buf;		/* Holds the variable name */
 	int depth = 1;
 	endc = startc == PROPEN ? PRCLOSE : BRCLOSE;
 	Buf_Init(&buf, 0);
 	/*
 	 * Skip to the end character or a colon, whichever comes first.
 	 */
 	for (tstr = str + 2; *tstr != '\0'; tstr++) {
 	    /* Track depth so we can spot parse errors. */
 	    if (*tstr == startc)
 		depth++;
 	    if (*tstr == endc) {
 		if (--depth == 0)
 		    break;
+	    }
 	    if (depth == 1 && *tstr == ':')
 		break;
 	    /* A variable inside a variable, expand. */
 	    if (*tstr == '$') {
 		int rlen;
 		void *freeIt;
 		char *rval = Var_Parse(tstr, ctxt, flags, &rlen, &freeIt);
 		if (rval != NULL)
 		    Buf_AddStr(&buf, rval);
 		free(freeIt);
 		tstr += rlen - 1;
 	    } else
 		Buf_AddByte(&buf, *tstr);
+	}
 	if (*tstr == ':') {
 	    haveModifier = TRUE;
 	} else if (*tstr == endc) {
 	    haveModifier = FALSE;
 	} else {
 	    /*
 	     * If we never did find the end character, return NULL
 	     * right now, setting the length to be the distance to
 	     * the end of the string, since that's what make does.
 	     */
 	    *lengthPtr = tstr - str;
 	    Buf_Destroy(&buf, TRUE);
 	    return var_Error;
+	}
 	str = Buf_GetAll(&buf, &vlen);
 	/*
 	 * At this point, str points into newly allocated memory from
 	 * buf, containing only the name of the variable.
+	 *
 	 * start and tstr point into the const string that was pointed
 	 * to by the original value of the str parameter.  start points
 	 * to the '$' at the beginning of the string, while tstr points
 	 * to the char just after the end of the variable name -- this
 	 * will be '\0', ':', PRCLOSE, or BRCLOSE.
 	 */
 	v = VarFind(str, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);