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make u2_chop deterministic

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u2_atom_word happily reads garbage past the end of the buffer. Make it
not do that.
This commit is contained in:
~hatteb-mitlyd 2014-04-18 10:07:40 -07:00
parent 7aea3bd148
commit 955c5a8fb5
1 changed files with 2 additions and 2 deletions
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4
f/loom.c
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@ -1733,6 +1733,7 @@ u2_chop(c3_g met_g,
u2_atom src)
{
c3_w i_w;
c3_w len_w = (u2_fly_is_cat(src) ? 1 : *u2_at_pug_len(src));
c3_assert(u2_none != src);
c3_assert(u2_fly_is_atom(src));
@ -1752,7 +1753,7 @@ u2_chop(c3_g met_g,
c3_g rat_g = (bat_w & 31);
c3_w hop_w;
hop_w = u2_atom_word(src, waf_w);
hop_w = (waf_w >= len_w) ? 0 : u2_atom_word(src, waf_w);
hop_w = (hop_w >> raf_g) & mek_w;
*u2_at_ray(dst_r + wat_w) ^= (hop_w << rat_g);
@ -1762,7 +1763,6 @@ u2_chop(c3_g met_g,
}
}
else {
c3_w len_w = (u2_fly_is_cat(src) ? 1 : *u2_at_pug_len(src));
c3_g hut_g = (met_g - 5);
c3_w san_w = (1 << hut_g);
c3_w j_w;