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lstrcpyn[AW] count should be considered unsigned.

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This commit is contained in:
Alexandre Julliard 2002-08-16 20:00:48 +00:00
parent 456ffd6241
commit 07b6a624cb
1 changed files with 26 additions and 5 deletions
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31
memory/string.c
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@ -183,12 +183,18 @@ SEGPTR WINAPI lstrcpyn16( SEGPTR dst, LPCSTR src, INT16 n )
* lstrcpynA (KERNEL32.@)
*
* Note: this function differs from the UNIX strncpy, it _always_ writes
* a terminating \0
* a terminating \0.
*
* Note: n is an INT but Windows treats it as unsigned, and will happily
* copy a gazillion chars if n is negative.
*/
LPSTR WINAPI lstrcpynA( LPSTR dst, LPCSTR src, INT n )
{
LPSTR p = dst;
UINT count = n;
TRACE("(%p, %s, %i)\n", dst, debugstr_a(src), n);
/* In real windows the whole function is protected by an exception handler
* that returns ERROR_INVALID_PARAMETER on faulty parameters
* We currently just check for NULL.
@ -197,21 +203,32 @@ LPSTR WINAPI lstrcpynA( LPSTR dst, LPCSTR src, INT n )
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
while ((n-- > 1) && *src) *p++ = *src++;
if (n >= 0) *p = 0;
while ((count > 1) && *src)
{
count--;
*p++ = *src++;
}
if (count) *p = 0;
return dst;
}
/***********************************************************************
* lstrcpynW (KERNEL32.@)
*
* Note: this function differs from the UNIX strncpy, it _always_ writes
* a terminating \0
*
* Note: n is an INT but Windows treats it as unsigned, and will happily
* copy a gazillion chars if n is negative.
*/
LPWSTR WINAPI lstrcpynW( LPWSTR dst, LPCWSTR src, INT n )
{
LPWSTR p = dst;
UINT count = n;
TRACE("(%p, %s, %i)\n", dst, debugstr_w(src), n);
/* In real windows the whole function is protected by an exception handler
* that returns ERROR_INVALID_PARAMETER on faulty parameters
* We currently just check for NULL.
@ -220,8 +237,12 @@ LPWSTR WINAPI lstrcpynW( LPWSTR dst, LPCWSTR src, INT n )
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
while ((n-- > 1) && *src) *p++ = *src++;
if (n >= 0) *p = 0;
while ((count > 1) && *src)
{
count--;
*p++ = *src++;
}
if (count) *p = 0;
return dst;
}