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Rework t_compare_mpi() to improve diagnostics.

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Dag-Erling Smørgrav 2017-02-19 14:38:24 +01:00
parent 42f68fb348
commit ae7f1e909e
1 changed files with 31 additions and 7 deletions
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38
t/t_mpi.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014 Dag-Erling Smørgrav
* Copyright (c) 2014-2017 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -73,7 +73,7 @@ static uint32_t large_e[LARGE_E_SIZE];
* Verify that an MPI has never grown.
*/
static int
t_mpi_not_grown(cryb_mpi *x)
t_mpi_not_grown(const cryb_mpi *x)
{
int ret = 1;
@ -106,7 +106,7 @@ t_mpi_grown(cryb_mpi *x)
* Verify that an MPI is zero.
*/
static int
t_mpi_is_zero(cryb_mpi *x)
t_mpi_is_zero(const cryb_mpi *x)
{
int ret = 1;
@ -117,11 +117,24 @@ t_mpi_is_zero(cryb_mpi *x)
return (ret);
}
/*
* Print an MPI in semi-human-readable form
*/
static void
t_verbose_mpi(const cryb_mpi *x)
{
t_verbose("%c", x->neg ? '-' : '+');
t_verbose("%08x", x->msb == 0 ? 0 : x->words[0]);
for (unsigned int i = 1; i < (x->msb + 31) / 32; ++i)
t_verbose(" %08x", x->words[i]);
}
/*
* Verify that an MPI has the expected value
*/
static int
t_compare_mpi(cryb_mpi *e, cryb_mpi *x)
t_compare_mpi(const cryb_mpi *e, const cryb_mpi *x)
{
int ret = 1;
@ -129,9 +142,20 @@ t_compare_mpi(cryb_mpi *e, cryb_mpi *x)
return (1);
if (e == NULL || x == NULL)
return (0);
ret &= t_compare_u(e->msb, x->msb);
ret &= t_compare_i(e->neg, x->neg);
ret &= t_compare_mem(e->words, x->words, (e->msb + 7) / 8);
if (x->words == NULL) {
t_verbose("uninitialized MPI\n");
return (0);
}
if (e->neg != x->neg || e->msb != x->msb ||
memcmp(e->words, x->words, (e->msb + 7) / 8) != 0) {
t_verbose("expected ");
t_verbose_mpi(e);
t_verbose("\n");
t_verbose("received ");
t_verbose_mpi(x);
t_verbose("\n");
ret = 0;
}
return (ret);
}