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lstrcpyn is documented to always return a NUL terminated string

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svn path=/trunk/; revision=7994
This commit is contained in:
Gé van Geldorp
2004-02-02 15:50:16 +00:00
parent 90fd161f1e
commit 08b2e62907
1 changed files with 22 additions and 8 deletions
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reactos/lib/kernel32/string/lstring.c
+22 -8
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@@ -51,21 +51,28 @@ lstrcpynA(
)
{
/* Can't use strncpy, because strncpy will fill unused bytes in
lpString1 with NUL bytes while lstrcpynA doesn't */
lpString1 with NUL bytes while lstrcpynA doesn't. Also lstrcpynA
guarantees NUL termination while strncpy doesn't */
if (0 != iMaxLength)
if (1 < iMaxLength)
{
char *d = lpString1;
const char *s = lpString2;
do
{
if (0 == (*d++ = *s++))
if ('\0' == (*d++ = *s++))
{
break;
}
}
while(0 != --iMaxLength);
while(1 != --iMaxLength);
*d = '\0';
}
else if (1 == iMaxLength)
{
/* Only space for the terminator */
*lpString1 = '\0';
}
return lpString1;
@@ -153,21 +160,28 @@ lstrcpynW(
)
{
/* Can't use wcsncpy, because wcsncpy will fill unused bytes in
lpString1 with NUL bytes while lstrcpynW doesn't */
lpString1 with NUL bytes while lstrcpynW doesn't Also lstrcpynW
guarantees NUL termination while wcsncpy doesn't */
if (0 != iMaxLength)
if (1 < iMaxLength)
{
WCHAR *d = lpString1;
const WCHAR *s = lpString2;
do
{
if (0 == (*d++ = *s++))
if (L'\0' == (*d++ = *s++))
{
break;
}
}
while(0 != --iMaxLength);
while(1 != --iMaxLength);
*d = L'\0';
}
else if (1 == iMaxLength)
{
/* Only space for the terminator */
*lpString1 = L'\0';
}
return lpString1;