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author | polwex <polwex@sortug.com> | 2025-10-05 21:56:51 +0700 |
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committer | polwex <polwex@sortug.com> | 2025-10-05 21:56:51 +0700 |
commit | fcedfddf00b3f994e4f4e40332ac7fc192c63244 (patch) | |
tree | 51d38e62c7bdfcc5f9a5e9435fe820c93cfc9a3d /vere/pkg/noun/jets/a/dec.c |
claude is gud
Diffstat (limited to 'vere/pkg/noun/jets/a/dec.c')
-rw-r--r-- | vere/pkg/noun/jets/a/dec.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/a/dec.c b/vere/pkg/noun/jets/a/dec.c new file mode 100644 index 0000000..02a8ba1 --- /dev/null +++ b/vere/pkg/noun/jets/a/dec.c @@ -0,0 +1,57 @@ +/// @file + +#include "jets/k.h" +#include "jets/q.h" +#include "jets/w.h" + +#include "noun.h" + +u3_noun +u3qa_inc(u3_atom a) +{ + return u3i_vint(u3k(a)); +} + +u3_noun +u3qa_dec(u3_atom a) +{ + if ( 0 == a ) { + return u3m_error("decrement-underflow"); + } + else { + if ( _(u3a_is_cat(a)) ) { + return a - 1; + } + else { + mpz_t a_mp; + + u3r_mp(a_mp, a); + mpz_sub_ui(a_mp, a_mp, 1); + + return u3i_mp(a_mp); + } + } +} + +u3_noun +u3wa_dec(u3_noun cor) +{ + u3_noun a; + + if ( (u3_none == (a = u3r_at(u3x_sam, cor))) || + (c3n == u3ud(a)) ) + { + return u3m_bail(c3__fail); + } + else { + return u3qa_dec(a); + } +} + +u3_noun +u3ka_dec(u3_atom a) +{ + u3_noun b = u3qa_dec(a); + u3z(a); + return b; +} |