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| author | Sverker Eriksson <[email protected]> | 2012-02-23 14:45:42 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2012-02-23 14:45:42 +0100 |
| commit | 225da20b097ad73291cf48ba2782c64762163a46 (patch) | |
| tree | f6901cf50f16eb19a0617be068bec613077823a2 /erts/emulator/beam/big.c | |
| parent | bbd8182e4b4ed116743f81ff456b53b86b1bea8f (diff) | |
| parent | 3398aa592af611b84edad4fa56e88379df6d1735 (diff) | |
| download | otp-225da20b097ad73291cf48ba2782c64762163a46.tar.gz otp-225da20b097ad73291cf48ba2782c64762163a46.tar.bz2 otp-225da20b097ad73291cf48ba2782c64762163a46.zip | |
Merge branch 'maint'
Diffstat (limited to 'erts/emulator/beam/big.c')
| -rw-r--r-- | erts/emulator/beam/big.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/erts/emulator/beam/big.c b/erts/emulator/beam/big.c index 976f05c990..25ac790d81 100644 --- a/erts/emulator/beam/big.c +++ b/erts/emulator/beam/big.c @@ -1844,6 +1844,7 @@ dsize_t big_bytes(Eterm x) /* ** Load a bignum from bytes ** xsz is the number of bytes in xp +** *r is untouched if number fits in small */ Eterm bytes_to_big(byte *xp, dsize_t xsz, int xsgn, Eterm *r) { @@ -1852,7 +1853,7 @@ Eterm bytes_to_big(byte *xp, dsize_t xsz, int xsgn, Eterm *r) ErtsDigit d; int i; - while(xsz >= sizeof(ErtsDigit)) { + while(xsz > sizeof(ErtsDigit)) { d = 0; for(i = sizeof(ErtsDigit); --i >= 0;) d = (d << 8) | xp[i]; @@ -1867,11 +1868,20 @@ Eterm bytes_to_big(byte *xp, dsize_t xsz, int xsgn, Eterm *r) d = 0; for(i = xsz; --i >= 0;) d = (d << 8) | xp[i]; + if (++rsz == 1 && IS_USMALL(xsgn,d)) { + if (xsgn) d = -d; + return make_small(d); + } *rwp = d; rwp++; - rsz++; } - return big_norm(r, rsz, (short) xsgn); + if (xsgn) { + *r = make_neg_bignum_header(rsz); + } + else { + *r = make_pos_bignum_header(rsz); + } + return make_big(r); } /* |