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mruby-bigint: use pool scoping in mpz_powm and mpz_powm_i

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This change updates the mpz_powm and mpz_powm_i functions to use the
pool_save and pool_restore functions to manage memory for temporary
variables. This improves memory efficiency by allowing the pool to
reuse memory regions.

Co-authored-by: Gemini <gemini@google.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2025-07-28 16:31:49 +09:00
parent f904cb93cd
commit 00f7a9084c
1 changed files with 10 additions and 4 deletions
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mrbgems/mruby-bigint/core/bigint.c
+10 -4
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@@ -1732,6 +1732,7 @@ mpz_powm(mpz_ctx_t *ctx, mpz_t *zz, mpz_t *x, mpz_t *ex, mpz_t *n)
return;
}
size_t pool_state = pool_save(MPZ_POOL(ctx));
mpz_t t, b;
mpz_init_set_int(ctx, &t, 1);
mpz_init_set(ctx, &b, x);
@@ -1769,12 +1770,14 @@ mpz_powm(mpz_ctx_t *ctx, mpz_t *zz, mpz_t *x, mpz_t *ex, mpz_t *n)
}
}
mpz_move(ctx, zz, &t);
mpz_clear(ctx, &t);
mpz_clear(ctx, &b);
mpz_clear(ctx, &temp);
if (use_barrett) {
mpz_clear(ctx, &mu);
}
mpz_move(ctx, zz, &t);
mpz_clear(ctx, &b);
pool_restore(MPZ_POOL(ctx), pool_state);
}
@@ -1790,6 +1793,7 @@ mpz_powm_i(mpz_ctx_t *ctx, mpz_t *zz, mpz_t *x, mrb_int ex, mpz_t *n)
return;
}
size_t pool_state = pool_save(MPZ_POOL(ctx));
mpz_t t, b;
mpz_init_set_int(ctx, &t, 1);
mpz_init_set(ctx, &b, x);
@@ -1825,12 +1829,14 @@ mpz_powm_i(mpz_ctx_t *ctx, mpz_t *zz, mpz_t *x, mrb_int ex, mpz_t *n)
}
}
mpz_move(ctx, zz, &t);
mpz_clear(ctx, &t);
mpz_clear(ctx, &b);
mpz_clear(ctx, &temp);
if (use_barrett) {
mpz_clear(ctx, &mu);
}
mpz_move(ctx, zz, &t);
mpz_clear(ctx, &b);
pool_restore(MPZ_POOL(ctx), pool_state);
}
/* Helper functions for pool-based GCD operations */