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thin_metadata_size.c: format output enhancements

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Heinz Mauelshagen 2013-07-12 12:58:53 +02:00
parent 3a95c7f830
commit 99a1b96b2f
1 changed files with 18 additions and 13 deletions
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31
thin-provisioning/thin_metadata_size.c
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@ -50,10 +50,7 @@ static struct global *init(void)
memset(&r, 0, sizeof(r)); memset(&r, 0, sizeof(r));
r.unit.chars = "bskKmMgGtTpPeEzZyY"; r.unit.chars = "bskKmMgGtTpPeEzZyY";
u = 0; u = 0;
r.unit.factors[u++] = 1; r.unit.factors[u++] = 1, r.unit.factors[u++] = 512, r.unit.factors[u++] = 1024, r.unit.factors[u++] = 1000;
r.unit.factors[u++] = 512;
r.unit.factors[u++] = 1024;
r.unit.factors[u++] = 1000;
for ( ; u < UNIT_ARRAY_SZ; u += 2) { for ( ; u < UNIT_ARRAY_SZ; u += 2) {
r.unit.factors[u] = r.unit.factors[2] * r.unit.factors[u - 2]; r.unit.factors[u] = r.unit.factors[2] * r.unit.factors[u - 2];
r.unit.factors[u+1] = r.unit.factors[3] * r.unit.factors[u - 1]; r.unit.factors[u+1] = r.unit.factors[3] * r.unit.factors[u - 1];
@ -178,9 +175,23 @@ static const unsigned mappings_per_block(void)
return (btree_size.node - btree_size.node_header) / btree_size.entry; return (btree_size.node - btree_size.node_header) / btree_size.entry;
} }
static unsigned precision(double r) static void printf_precision(double r, int full, char *unit_str)
{ {
return r == truncl(r) ? 0 : 3; double rtrunc = truncl(r);
/* FIXME: correct output */
if (full)
printf("%s - estimated metadata area size is ", prg);
if (r == rtrunc)
printf("%llu", (unsigned long long) r);
else
printf(r - truncl(r) < 1E-3 ? "%0.3e" : "%0.3f", r);
if (full)
printf(" %s", unit_str);
putchar('\n');
} }
static void estimated_result(struct global *g) static void estimated_result(struct global *g)
@ -192,13 +203,7 @@ static void estimated_result(struct global *g)
r = (1.0 + (2 * g->options.n[poolsize] / g->options.n[blocksize] / mappings_per_block() + g->options.n[maxthins])) * 8 * bytes_per_sector; /* in bytes! */ r = (1.0 + (2 * g->options.n[poolsize] / g->options.n[blocksize] / mappings_per_block() + g->options.n[maxthins])) * 8 * bytes_per_sector; /* in bytes! */
r /= g->unit.factors[idx]; /* in requested unit */ r /= g->unit.factors[idx]; /* in requested unit */
// printf("%c idx=%u factor=%llu r=%f\n", g->options.unit, idx, g->unit.factors[idx], r); printf_precision(r, !g->options.n[numeric], g->unit.strings[idx]);
/* FIXME: correct output */
if (g->options.n[numeric])
printf("%.*f\n", precision(r), r);
else
printf("%s - estimated metadata area size is %.*f %s\n", prg, precision(r), r, g->unit.strings[idx]);
} }
int main(int argc, char **argv) int main(int argc, char **argv)