aboutsummaryrefslogtreecommitdiffstats
path: root/moon-abe/pbc-0.5.14/arith/multiz.c
diff options
context:
space:
mode:
Diffstat (limited to 'moon-abe/pbc-0.5.14/arith/multiz.c')
-rw-r--r--moon-abe/pbc-0.5.14/arith/multiz.c589
1 files changed, 0 insertions, 589 deletions
diff --git a/moon-abe/pbc-0.5.14/arith/multiz.c b/moon-abe/pbc-0.5.14/arith/multiz.c
deleted file mode 100644
index 6c8b43cc..00000000
--- a/moon-abe/pbc-0.5.14/arith/multiz.c
+++ /dev/null
@@ -1,589 +0,0 @@
-// Multinomials over Z.
-// e.g. [[1, 2], 3, [4, [5, 6]]] means
-// (1 + 2y) + 3 x + (4 + (5 + 6z)y)x^2
-// Convenient interchange format for different groups, rings, and fields.
-
-// TODO: Canonicalize, e.g. [[1]], 0, 0] --> 1.
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdint.h> // for intptr_t
-#include <stdlib.h>
-#include <gmp.h>
-#include "pbc_utils.h"
-#include "pbc_field.h"
-#include "pbc_multiz.h"
-#include "pbc_random.h"
-#include "pbc_fp.h"
-#include "pbc_memory.h"
-#include "misc/darray.h"
-
-// Per-element data.
-struct multiz_s {
- // Either it's an mpz, or a list of mpzs.
- char type;
- union {
- mpz_t z;
- darray_t a;
- };
-};
-
-enum {
- T_MPZ,
- T_ARR,
-};
-
-static multiz multiz_new_empty_list(void) {
- multiz ep = pbc_malloc(sizeof(*ep));
- ep->type = T_ARR;
- darray_init(ep->a);
- return ep;
-}
-
-void multiz_append(element_ptr x, element_ptr e) {
- multiz l = x->data;
- darray_append(l->a, e->data);
-}
-
-static multiz multiz_new(void) {
- multiz ep = pbc_malloc(sizeof(*ep));
- ep->type = T_MPZ;
- mpz_init(ep->z);
- return ep;
-}
-
-static void f_init(element_ptr e) {
- e->data = multiz_new();
-}
-
-static void multiz_free(multiz ep) {
- switch(ep->type) {
- case T_MPZ:
- mpz_clear(ep->z);
- break;
- default:
- PBC_ASSERT(T_ARR == ep->type, "no such type");
- darray_forall(ep->a, (void(*)(void*))multiz_free);
- darray_clear(ep->a);
- break;
- }
- pbc_free(ep);
-}
-
-static void f_clear(element_ptr e) {
- multiz_free(e->data);
-}
-
-element_ptr multiz_new_list(element_ptr e) {
- element_ptr x = pbc_malloc(sizeof(*x));
- element_init_same_as(x, e);
- multiz_free(x->data);
- x->data = multiz_new_empty_list();
- multiz_append(x, e);
- return x;
-}
-
-static void f_set_si(element_ptr e, signed long int op) {
- multiz_free(e->data);
- f_init(e);
- multiz ep = e->data;
- mpz_set_si(ep->z, op);
-}
-
-static void f_set_mpz(element_ptr e, mpz_ptr z) {
- multiz_free(e->data);
- f_init(e);
- multiz ep = e->data;
- mpz_set(ep->z, z);
-}
-
-static void f_set0(element_ptr e) {
- multiz_free(e->data);
- f_init(e);
-}
-
-static void f_set1(element_ptr e) {
- multiz_free(e->data);
- f_init(e);
- multiz ep = e->data;
- mpz_set_ui(ep->z, 1);
-}
-
-static size_t multiz_out_str(FILE *stream, int base, multiz ep) {
- switch(ep->type) {
- case T_MPZ:
- return mpz_out_str(stream, base, ep->z);
- default:
- PBC_ASSERT(T_ARR == ep->type, "no such type");
- fputc('[', stream);
- size_t res = 1;
- int n = darray_count(ep->a);
- int i;
- for(i = 0; i < n; i++) {
- if (i) res += 2, fputs(", ", stream);
- res += multiz_out_str(stream, base, darray_at(ep->a, i));
- }
- fputc(']', stream);
- res++;
- return res;
- }
-}
-
-static size_t f_out_str(FILE *stream, int base, element_ptr e) {
- return multiz_out_str(stream, base, e->data);
-}
-
-void multiz_to_mpz(mpz_ptr z, multiz ep) {
- while(ep->type == T_ARR) ep = darray_at(ep->a, 0);
- PBC_ASSERT(T_MPZ == ep->type, "no such type");
- mpz_set(z, ep->z);
-}
-
-static void f_to_mpz(mpz_ptr z, element_ptr a) {
- multiz_to_mpz(z, a->data);
-}
-
-static int multiz_sgn(multiz ep) {
- while(ep->type == T_ARR) ep = darray_at(ep->a, 0);
- PBC_ASSERT(T_MPZ == ep->type, "no such type");
- return mpz_sgn(ep->z);
-}
-
-static int f_sgn(element_ptr a) {
- return multiz_sgn(a->data);
-}
-
-static void add_to_x(void *data,
- multiz x,
- void (*fun)(mpz_t, const mpz_t, void *scope_ptr),
- void *scope_ptr);
-
-static multiz multiz_new_unary(const multiz y,
- void (*fun)(mpz_t, const mpz_t, void *scope_ptr), void *scope_ptr) {
- multiz x = pbc_malloc(sizeof(*x));
- switch(y->type) {
- case T_MPZ:
- x->type = T_MPZ;
- mpz_init(x->z);
- fun(x->z, y->z, scope_ptr);
- break;
- default:
- PBC_ASSERT(T_ARR == ep->type, "no such type");
- x->type = T_ARR;
- darray_init(x->a);
- darray_forall4(y->a,
- (void(*)(void*,void*,void*,void*))add_to_x,
- x,
- fun,
- scope_ptr);
- break;
- }
- return x;
-}
-
-static void add_to_x(void *data,
- multiz x,
- void (*fun)(mpz_t, const mpz_t, void *scope_ptr),
- void *scope_ptr) {
- darray_append(x->a, multiz_new_unary(data, fun, scope_ptr));
-}
-
-static void mpzset(mpz_t dst, const mpz_t src, void *scope_ptr) {
- UNUSED_VAR(scope_ptr);
- mpz_set(dst, src);
-}
-
-static multiz multiz_clone(multiz y) {
- return multiz_new_unary(y, (void(*)(mpz_t, const mpz_t, void *))mpzset, NULL);
-}
-
-static multiz multiz_new_bin(const multiz a, const multiz b,
- void (*fun)(mpz_t, const mpz_t, const mpz_t)) {
- if (T_MPZ == a->type) {
- if (T_MPZ == b->type) {
- multiz x = multiz_new();
- fun(x->z, a->z, b->z);
- return x;
- } else {
- multiz x = multiz_clone(b);
- multiz z = x;
- PBC_ASSERT(T_ARR == z->type, "no such type");
- while(z->type == T_ARR) z = darray_at(z->a, 0);
- fun(z->z, a->z, z->z);
- return x;
- }
- } else {
- PBC_ASSERT(T_ARR == a->type, "no such type");
- if (T_MPZ == b->type) {
- multiz x = multiz_clone(a);
- multiz z = x;
- PBC_ASSERT(T_ARR == z->type, "no such type");
- while(z->type == T_ARR) z = darray_at(z->a, 0);
- fun(z->z, b->z, z->z);
- return x;
- } else {
- PBC_ASSERT(T_ARR == b->type, "no such type");
- int m = darray_count(a->a);
- int n = darray_count(b->a);
- int min = m < n ? m : n;
- int max = m > n ? m : n;
- multiz x = multiz_new_empty_list();
- int i;
- for(i = 0; i < min; i++) {
- multiz z = multiz_new_bin(darray_at(a->a, i), darray_at(b->a, i), fun);
- darray_append(x->a, z);
- }
- multiz zero = multiz_new();
- for(; i < max; i++) {
- multiz z = multiz_new_bin(m > n ? darray_at(a->a, i) : zero,
- n > m ? darray_at(b->a, i) : zero,
- fun);
- darray_append(x->a, z);
- }
- multiz_free(zero);
- return x;
- }
- }
-}
-static multiz multiz_new_add(const multiz a, const multiz b) {
- return multiz_new_bin(a, b, mpz_add);
-}
-
-static void f_add(element_ptr n, element_ptr a, element_ptr b) {
- multiz delme = n->data;
- n->data = multiz_new_add(a->data, b->data);
- multiz_free(delme);
-}
-
-static multiz multiz_new_sub(const multiz a, const multiz b) {
- return multiz_new_bin(a, b, mpz_sub);
-}
-static void f_sub(element_ptr n, element_ptr a, element_ptr b) {
- multiz delme = n->data;
- n->data = multiz_new_sub(a->data, b->data);
- multiz_free(delme);
-}
-
-static void mpzmul(mpz_t x, const mpz_t y, const mpz_t z) {
- mpz_mul(x, y, z);
-}
-
-static multiz multiz_new_mul(const multiz a, const multiz b) {
- if (T_MPZ == a->type) {
- // Multiply each coefficient of b by a->z.
- return multiz_new_unary(b, (void(*)(mpz_t, const mpz_t, void *))mpzmul, a->z);
- } else {
- PBC_ASSERT(T_ARR == a->type, "no such type");
- if (T_MPZ == b->type) {
- // Multiply each coefficient of a by b->z.
- return multiz_new_unary(a, (void(*)(mpz_t, const mpz_t, void *))mpzmul, b->z);
- } else {
- PBC_ASSERT(T_ARR == b->type, "no such type");
- int m = darray_count(a->a);
- int n = darray_count(b->a);
- int max = m + n - 1;
- multiz x = multiz_new_empty_list();
- int i;
- multiz zero = multiz_new();
- for(i = 0; i < max; i++) {
- multiz z = multiz_new();
- int j;
- for (j = 0; j <= i; j++) {
- multiz y = multiz_new_mul(j < m ? darray_at(a->a, j) : zero,
- i - j < n ? darray_at(b->a, i - j) : zero);
- multiz t = multiz_new_add(z, y);
- multiz_free(y);
- multiz_free(z);
- z = t;
- }
- darray_append(x->a, z);
- }
- multiz_free(zero);
- return x;
- }
- }
-}
-static void f_mul(element_ptr n, element_ptr a, element_ptr b) {
- multiz delme = n->data;
- n->data = multiz_new_mul(a->data, b->data);
- multiz_free(delme);
-}
-
-static void f_mul_mpz(element_ptr n, element_ptr a, mpz_ptr z) {
- multiz delme = n->data;
- n->data = multiz_new_unary(a->data, (void(*)(mpz_t, const mpz_t, void *))mpzmul, z);
- multiz_free(delme);
-}
-
-static void mulsi(mpz_t x, const mpz_t y, signed long *i) {
- mpz_mul_si(x, y, *i);
-}
-
-static void f_mul_si(element_ptr n, element_ptr a, signed long int z) {
- multiz delme = n->data;
- n->data = multiz_new_unary(a->data, (void(*)(mpz_t, const mpz_t, void *))mulsi, &z);
- multiz_free(delme);
-}
-
-static void mpzneg(mpz_t dst, const mpz_t src, void *scope_ptr) {
- UNUSED_VAR(scope_ptr);
- mpz_neg(dst, src);
-}
-
-static multiz multiz_new_neg(multiz z) {
- return multiz_new_unary(z, (void(*)(mpz_t, const mpz_t, void *))mpzneg, NULL);
-}
-
-static void f_set(element_ptr n, element_ptr a) {
- multiz delme = n->data;
- n->data = multiz_clone(a->data);
- multiz_free(delme);
-}
-
-static void f_neg(element_ptr n, element_ptr a) {
- multiz delme = n->data;
- n->data = multiz_new_neg(a->data);
- multiz_free(delme);
-}
-
-static void f_div(element_ptr c, element_ptr a, element_ptr b) {
- mpz_t d;
- mpz_init(d);
- element_to_mpz(d, b);
- multiz delme = c->data;
- c->data = multiz_new_unary(a->data, (void(*)(mpz_t, const mpz_t, void *))mpz_tdiv_q, d);
- mpz_clear(d);
- multiz_free(delme);
-}
-
-// Doesn't make sense if order is infinite.
-static void f_random(element_ptr n) {
- multiz delme = n->data;
- f_init(n);
- multiz_free(delme);
-}
-
-static void f_from_hash(element_ptr n, void *data, int len) {
- mpz_t z;
- mpz_init(z);
- mpz_import(z, len, -1, 1, -1, 0, data);
- f_set_mpz(n, z);
- mpz_clear(z);
-}
-
-static int f_is1(element_ptr n) {
- multiz ep = n->data;
- return ep->type == T_MPZ && !mpz_cmp_ui(ep->z, 1);
-}
-
-int multiz_is0(multiz m) {
- return m->type == T_MPZ && mpz_is0(m->z);
-}
-
-static int f_is0(element_ptr n) {
- return multiz_is0(n->data);
-}
-
-static int f_item_count(element_ptr e) {
- multiz z = e->data;
- if (T_MPZ == z->type) return 0;
- return darray_count(z->a);
-}
-
-// TODO: Redesign multiz so this doesn't leak.
-static element_ptr f_item(element_ptr e, int i) {
- multiz z = e->data;
- if (T_MPZ == z->type) return NULL;
- element_ptr r = malloc(sizeof(*r));
- r->field = e->field;
- r->data = darray_at(z->a, i);
- return r;
-}
-
-// Usual meaning when both are integers.
-// Otherwise, compare coefficients.
-static int multiz_cmp(multiz a, multiz b) {
- if (T_MPZ == a->type) {
- if (T_MPZ == b->type) {
- // Simplest case: both are integers.
- return mpz_cmp(a->z, b->z);
- }
- // Leading coefficient of b.
- while(T_ARR == b->type) b = darray_last(b->a);
- PBC_ASSERT(T_MPZ == b->type, "no such type");
- return -mpz_sgn(b->z);
- }
- PBC_ASSERT(T_ARR == a->type, "no such type");
- if (T_MPZ == b->type) {
- // Leading coefficient of a.
- while(T_ARR == a->type) a = darray_last(a->a);
- PBC_ASSERT(T_MPZ == a->type, "no such type");
- return mpz_sgn(a->z);
- }
- PBC_ASSERT(T_ARR == b->type, "no such type");
- int m = darray_count(a->a);
- int n = darray_count(b->a);
- if (m > n) {
- // Leading coefficient of a.
- while(T_ARR == a->type) a = darray_last(a->a);
- PBC_ASSERT(T_MPZ == a->type, "no such type");
- return mpz_sgn(a->z);
- }
- if (n > m) {
- // Leading coefficient of b.
- while(T_ARR == b->type) b = darray_last(b->a);
- PBC_ASSERT(T_MPZ == b->type, "no such type");
- return -mpz_sgn(b->z);
- }
- for(n--; n >= 0; n--) {
- int i = multiz_cmp(darray_at(a->a, n), darray_at(b->a, n));
- if (i) return i;
- }
- return 0;
-}
-static int f_cmp(element_ptr x, element_ptr y) {
- return multiz_cmp(x->data, y->data);
-}
-
-static void f_field_clear(field_t f) { UNUSED_VAR (f); }
-
-// OpenSSL convention:
-// 4 bytes containing length
-// followed by number in big-endian, most-significant bit set if negative
-// (prepending null byte if necessary)
-// Positive numbers also the same as mpz_out_raw.
-static int z_to_bytes(unsigned char *data, element_t e) {
- mpz_ptr z = e->data;
- size_t msb = mpz_sizeinbase(z, 2);
- size_t n = 4;
- size_t i;
-
- if (!(msb % 8)) {
- data[4] = 0;
- n++;
- }
- if (mpz_sgn(z) < 0) {
- mpz_export(data + n, NULL, 1, 1, 1, 0, z);
- data[4] |= 128;
- } else {
- mpz_export(data + n, NULL, 1, 1, 1, 0, z);
- }
- n += (msb + 7) / 8 - 4;
- for (i=0; i<4; i++) {
- data[i] = (n >> 8 * (3 - i));
- }
- n += 4;
-
- return n;
-}
-
-static int z_from_bytes(element_t e, unsigned char *data) {
- unsigned char *ptr;
- size_t i, n;
- mpz_ptr z = e->data;
- mpz_t z1;
- int neg = 0;
-
- mpz_init(z1);
- mpz_set_ui(z, 0);
-
- ptr = data;
- n = 0;
- for (i=0; i<4; i++) {
- n += ((unsigned int) *ptr) << 8 * (3 - i);
- ptr++;
- }
- if (data[4] & 128) {
- neg = 1;
- data[4] &= 127;
- }
- for (i=0; i<n; i++) {
- mpz_set_ui(z1, *ptr);
- mpz_mul_2exp(z1, z1, 8 * (n - 1 - i));
- ptr++;
- mpz_add(z, z, z1);
- }
- mpz_clear(z1);
- if (neg) mpz_neg(z, z);
- return n;
-}
-
-static int z_length_in_bytes(element_ptr a) {
- return (mpz_sizeinbase(a->data, 2) + 7) / 8 + 4;
-}
-
-static void f_out_info(FILE *out, field_ptr f) {
- UNUSED_VAR(f);
- fprintf(out, "Z multinomials");
-}
-
-static int f_set_str(element_ptr e, const char *s, int base) {
- // TODO: Square brackets.
- mpz_t z;
- mpz_init(z);
- int result = pbc_mpz_set_str(z, s, base);
- f_set_mpz(e, z);
- mpz_clear(z);
- return result;
-}
-
-static void f_set_multiz(element_ptr e, multiz m) {
- multiz delme = e->data;
- e->data = multiz_clone(m);
- multiz_free(delme);
-}
-
-void field_init_multiz(field_ptr f) {
- field_init(f);
- f->init = f_init;
- f->clear = f_clear;
- f->set_si = f_set_si;
- f->set_mpz = f_set_mpz;
- f->set_multiz = f_set_multiz;
- f->set_str = f_set_str;
- f->out_str = f_out_str;
- f->sign = f_sgn;
- f->add = f_add;
- f->sub = f_sub;
- f->set = f_set;
- f->mul = f_mul;
- f->mul_mpz = f_mul_mpz;
- f->mul_si = f_mul_si;
- f->neg = f_neg;
- f->cmp = f_cmp;
- f->div = f_div;
- f->random = f_random;
- f->from_hash = f_from_hash;
- f->is1 = f_is1;
- f->is0 = f_is0;
- f->set0 = f_set0;
- f->set1 = f_set1;
- f->field_clear = f_field_clear;
- f->to_bytes = z_to_bytes;
- f->from_bytes = z_from_bytes;
- f->to_mpz = f_to_mpz;
- f->length_in_bytes = z_length_in_bytes;
- f->item = f_item;
- f->item_count = f_item_count;
-
- f->out_info = f_out_info;
-
- mpz_set_ui(f->order, 0);
- f->data = NULL;
- f->fixed_length_in_bytes = -1;
-}
-
-int multiz_is_z(multiz m) {
- return T_MPZ == m->type;
-}
-
-int multiz_count(multiz m) {
- if (T_ARR != m->type) return -1;
- return darray_count(m->a);
-}
-
-multiz multiz_at(multiz m, int i) {
- PBC_ASSERT(T_ARR == m->type, "wrong type");
- PBC_ASSERT(darray_count(m->a) > i, "out of bounds");
- return darray_at(m->a, i);
-}