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* libc/string/memset.c (memset): Make it safe even if 

sizeof (int) = 2.
This commit is contained in:
Kazu Hirata 2002-11-25 20:56:17 +00:00
parent 60d4d42f4f
commit f24585c6bb
2 changed files with 11 additions and 4 deletions
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5
newlib/ChangeLog
View File

@ -1,3 +1,8 @@
2002-11-25 Kazu Hirata <kazu@cs.umass.edu>
* libc/string/memset.c (memset): Make it safe even if
sizeof (int) = 2.
2002-11-22 Joe Buehler <jbuehler@hekimian.com> 2002-11-22 Joe Buehler <jbuehler@hekimian.com>
* configure.in: Change check for libc/include in ${CC} to * configure.in: Change check for libc/include in ${CC} to

10
newlib/libc/string/memset.c
View File

@ -64,21 +64,23 @@ _DEFUN (memset, (m, c, n),
{ {
/* If we get this far, we know that n is large and m is word-aligned. */ /* If we get this far, we know that n is large and m is word-aligned. */
/* To avoid sign extention, copy C to an unsigned variable. */
unsigned int d = c & 0xff;
aligned_addr = (unsigned long*)m; aligned_addr = (unsigned long*)m;
/* Store C into each char sized location in BUFFER so that /* Store D into each char sized location in BUFFER so that
we can set large blocks quickly. */ we can set large blocks quickly. */
c &= 0xff;
if (LBLOCKSIZE == 4) if (LBLOCKSIZE == 4)
{ {
buffer = (c << 8) | c; buffer = (d << 8) | d;
buffer |= (buffer << 16); buffer |= (buffer << 16);
} }
else else
{ {
buffer = 0; buffer = 0;
for (i = 0; i < LBLOCKSIZE; i++) for (i = 0; i < LBLOCKSIZE; i++)
buffer = (buffer << 8) | c; buffer = (buffer << 8) | d;
} }
while (n >= LBLOCKSIZE*4) while (n >= LBLOCKSIZE*4)