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Contrary to my previous thoughts, .for loop variable values do contain

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variable references - eg ${.TARGET} since that can't be expanded earlier.
Also the variable gets re-expanded before modifiers are applied.
All this means that we do need to let :U expand variables and must not
just escape $.
This commit is contained in:
dsl 2009-01-14 22:54:10 +00:00
parent 39f5db2b54
commit ac3b504aef
1 changed files with 46 additions and 6 deletions
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52
usr.bin/make/for.c
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@ -1,4 +1,4 @@
/* $NetBSD: for.c,v 1.44 2009/01/13 18:30:00 dsl Exp $ */
/* $NetBSD: for.c,v 1.45 2009/01/14 22:54:10 dsl Exp $ */
/*
* Copyright (c) 1992, The Regents of the University of California.
@ -30,14 +30,14 @@
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: for.c,v 1.44 2009/01/13 18:30:00 dsl Exp $";
static char rcsid[] = "$NetBSD: for.c,v 1.45 2009/01/14 22:54:10 dsl Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)for.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: for.c,v 1.44 2009/01/13 18:30:00 dsl Exp $");
__RCSID("$NetBSD: for.c,v 1.45 2009/01/14 22:54:10 dsl Exp $");
#endif
#endif /* not lint */
#endif
@ -301,11 +301,43 @@ For_Accum(char *line)
*-----------------------------------------------------------------------
*/
static int
for_var_len(const char *var)
{
char ch, var_start, var_end;
int depth;
int len;
var_start = *var;
if (var_start == 0)
/* just escape the $ */
return 0;
if (var_start == '(')
var_end = ')';
else if (var_start == '{')
var_end = '}';
else
/* Single char variable */
return 1;
depth = 1;
for (len = 1; (ch = var[len++]) != 0;) {
if (ch == var_start)
depth++;
else if (ch == var_end && --depth == 0)
return len;
}
/* Variable end not found, escape the $ */
return 0;
}
static void
for_substitute(Buffer cmds, strlist_t *items, unsigned int item_no, char ech)
{
const char *item = strlist_str(items, item_no);
int i;
int len;
char ch;
/* If there were no escapes, or the only escape is the other variable
@ -317,8 +349,16 @@ for_substitute(Buffer cmds, strlist_t *items, unsigned int item_no, char ech)
}
/* Escape ':', '$', '\\' and 'ech' - removed by :U processing */
for (i = 0; (ch = item[i]) != 0; i++) {
if (ch == ':' || ch == '$' || ch == '\\' || ch == ech)
while ((ch = *item++) != 0) {
if (ch == '$') {
len = for_var_len(item);
if (len != 0) {
Buf_AddBytes(cmds, len + 1, item - 1);
item += len;
continue;
}
Buf_AddByte(cmds, '\\');
} else if (ch == ':' || ch == '\\' || ch == ech)
Buf_AddByte(cmds, '\\');
Buf_AddByte(cmds, ch);
}