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using memmove instead of memcpy for potentially overlapping bignum copies

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Alex Shinn 2010-06-22 13:32:04 +00:00
parent 47a1c61117
commit 998951cab0
1 changed files with 3 additions and 3 deletions
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4
opt/bignum.c
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@ -79,12 +79,12 @@ sexp sexp_copy_bignum (sexp ctx, sexp dst, sexp a, sexp_uint_t len0) {
size = sexp_sizeof(bignum) + len*sizeof(sexp_uint_t); size = sexp_sizeof(bignum) + len*sizeof(sexp_uint_t);
if (! dst || sexp_bignum_length(dst) < len) { if (! dst || sexp_bignum_length(dst) < len) {
dst = sexp_alloc_tagged(ctx, size, SEXP_BIGNUM); dst = sexp_alloc_tagged(ctx, size, SEXP_BIGNUM);
memcpy(dst, a, size); memmove(dst, a, size);
sexp_bignum_length(dst) = len; sexp_bignum_length(dst) = len;
} else { } else {
memset(dst->value.bignum.data, 0, memset(dst->value.bignum.data, 0,
sexp_bignum_length(dst)*sizeof(sexp_uint_t)); sexp_bignum_length(dst)*sizeof(sexp_uint_t));
memcpy(dst->value.bignum.data, a->value.bignum.data, memmove(dst->value.bignum.data, a->value.bignum.data,
sexp_bignum_length(a)*sizeof(sexp_uint_t)); sexp_bignum_length(a)*sizeof(sexp_uint_t));
} }
return dst; return dst;