diff options
Diffstat (limited to 'bignum.c')
| -rw-r--r-- | bignum.c | 30 |
1 files changed, 18 insertions, 12 deletions
@@ -376,6 +376,20 @@ rb_quad_unpack(const char *buf, int sign) #else +static int +quad_buf_complement(char *buf, size_t len) +{ + size_t i; + for (i = 0; i < len; i++) + buf[i] = ~buf[i]; + for (i = 0; i < len; i++) { + buf[i]++; + if (buf[i] != 0) + return 0; + } + return 1; +} + void rb_quad_pack(char *buf, VALUE val) { @@ -388,15 +402,11 @@ rb_quad_pack(char *buf, VALUE val) } len = RBIGNUM_LEN(val) * SIZEOF_BDIGITS; if (len > QUAD_SIZE) { - rb_raise(rb_eRangeError, "bignum too big to convert into `quad int'"); + len = QUAD_SIZE; } memcpy(buf, (char*)BDIGITS(val), len); - if (!RBIGNUM_SIGN(val)) { - len = QUAD_SIZE; - while (len--) { - *buf = ~*buf; - buf++; - } + if (RBIGNUM_NEGATIVE_P(val)) { + quad_buf_complement(buf, QUAD_SIZE); } } @@ -409,14 +419,10 @@ rb_quad_unpack(const char *buf, int sign) memcpy((char*)BDIGITS(big), buf, QUAD_SIZE); if (sign && BNEG(buf)) { - long len = QUAD_SIZE; char *tmp = (char*)BDIGITS(big); RBIGNUM_SET_SIGN(big, 0); - while (len--) { - *tmp = ~*tmp; - tmp++; - } + quad_buf_complement(tmp, QUAD_SIZE); } return bignorm(big); |