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msvcrt: Ensure that old buffer contents are copied when allocating a growable pf_output buffer for the first time.

This commit is contained in:
Andrew Nguyen 2011-04-03 23:05:20 -05:00 committed by Alexandre Julliard
parent 25764d79c0
commit 5c57185060
1 changed files with 26 additions and 6 deletions
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36
dlls/msvcrt/wcs.c
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@ -429,19 +429,39 @@ static inline int pf_check_auto_grow(pf_output *out, unsigned delta)
out->len = max(out->len * 2, out->used + delta);
if (out->unicode)
{
WCHAR *ptr;
if (out->buf.W != out->grow.W)
out->buf.W = MSVCRT_realloc(out->buf.W, out->len * sizeof(WCHAR));
else
out->buf.W = MSVCRT_malloc(out->len * sizeof(WCHAR));
if (!out->buf.W) return -1;
{
if (!(ptr = MSVCRT_realloc(out->buf.W, out->len * sizeof(WCHAR))))
return -1;
}
else
{
if (out->buf.A != out->grow.A)
out->buf.A = MSVCRT_realloc(out->buf.A, out->len * sizeof(char));
if (!(ptr = MSVCRT_malloc(out->len * sizeof(WCHAR))))
return -1;
memcpy(ptr, out->buf.W, out->used * sizeof(WCHAR));
}
out->buf.W = ptr;
}
else
out->buf.A = MSVCRT_malloc(out->len * sizeof(char));
if (!out->buf.A) return -1;
{
char *ptr;
if (out->buf.A != out->grow.A)
{
if (!(ptr = MSVCRT_realloc(out->buf.A, out->len * sizeof(char))))
return -1;
}
else
{
if (!(ptr = MSVCRT_malloc(out->len * sizeof(char))))
return -1;
memcpy(ptr, out->buf.A, out->used * sizeof(char));
}
out->buf.A = ptr;
}
}
return 0;