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ntdll: Allow passing NULL buffer to printf functions.

This commit is contained in:
Sebastian Lackner 2013-12-20 05:56:40 +01:00 committed by Alexandre Julliard
parent 73edf08041
commit 3c2dc4a7b3
1 changed files with 14 additions and 8 deletions
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22
dlls/ntdll/printf.c
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@ -75,16 +75,17 @@ static inline int pf_output_stringW( pf_output *out, LPCWSTR str, int len )
if( out->unicode )
{
LPWSTR p = out->buf.W + out->used;
out->used += len;
if (!out->buf.W)
return len;
if( space >= len )
{
memcpy( p, str, len*sizeof(WCHAR) );
out->used += len;
return len;
}
if( space > 0 )
memcpy( p, str, space*sizeof(WCHAR) );
out->used += len;
}
else
{
@ -92,14 +93,16 @@ static inline int pf_output_stringW( pf_output *out, LPCWSTR str, int len )
ULONG n;
RtlUnicodeToMultiByteSize( &n, str, len * sizeof(WCHAR) );
out->used += n;
if (!out->buf.A)
return len;
if( space >= n )
{
RtlUnicodeToMultiByteN( p, n, NULL, str, len * sizeof(WCHAR) );
out->used += n;
return len;
}
if (space > 0) RtlUnicodeToMultiByteN( p, space, NULL, str, len * sizeof(WCHAR) );
out->used += n;
}
return -1;
}
@ -113,16 +116,17 @@ static inline int pf_output_stringA( pf_output *out, LPCSTR str, int len )
if( !out->unicode )
{
LPSTR p = out->buf.A + out->used;
out->used += len;
if (!out->buf.A)
return len;
if( space >= len )
{
memcpy( p, str, len );
out->used += len;
return len;
}
if( space > 0 )
memcpy( p, str, space );
out->used += len;
}
else
{
@ -130,14 +134,16 @@ static inline int pf_output_stringA( pf_output *out, LPCSTR str, int len )
ULONG n;
RtlMultiByteToUnicodeSize( &n, str, len );
out->used += n / sizeof(WCHAR);
if (!out->buf.W)
return len;
if (space >= n / sizeof(WCHAR))
{
RtlMultiByteToUnicodeN( p, n, NULL, str, len );
out->used += n / sizeof(WCHAR);
return len;
}
if (space > 0) RtlMultiByteToUnicodeN( p, space * sizeof(WCHAR), NULL, str, len );
out->used += n / sizeof(WCHAR);
}
return -1;
}