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genmodes: remove misleading use of strncpy 

* genmodes.c (make_complex_modes): Avoid unnecessary use of strncpy.
We verified above that the string(including trailing NUL) fits in buf,
so just use memcpy.

From-SVN: r186596
This commit is contained in:
Jim Meyering 2012-04-19 13:51:17 +00:00 committed by Jim Meyering
parent f68c04877c
commit 75be0217a8
2 changed files with 14 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-04-19 Jim Meyering <meyering@redhat.com>
genmodes: remove misleading use of strncpy
* genmodes.c (make_complex_modes): Avoid unnecessary use of strncpy.
We verified above that the string(including trailing NUL) fits in buf,
so just use memcpy.
2012-04-19 Richard Guenther <rguenther@suse.de>
* symtab.c (dump_symtab_base): Use TREE_STRING_POINTER

10
gcc/genmodes.c
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@ -1,5 +1,5 @@
/* Generate the machine mode enumeration and associated tables.
Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010
Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010, 2012
Free Software Foundation, Inc.
This file is part of GCC.
@ -435,11 +435,14 @@ make_complex_modes (enum mode_class cl,
for (m = modes[cl]; m; m = m->next)
{
size_t m_len;
/* Skip BImode. FIXME: BImode probably shouldn't be MODE_INT. */
if (m->precision == 1)
continue;
if (strlen (m->name) >= sizeof buf)
m_len = strlen (m->name);
if (m_len >= sizeof buf)
{
error ("%s:%d:mode name \"%s\" is too long",
m->file, m->line, m->name);
@ -452,7 +455,8 @@ make_complex_modes (enum mode_class cl,
if (cl == MODE_FLOAT)
{
char *p, *q = 0;
strncpy (buf, m->name, sizeof buf);
/* We verified above that m->name+NUL fits in buf. */
memcpy (buf, m->name, m_len + 1);
p = strchr (buf, 'F');
if (p == 0)
q = strchr (buf, 'D');