shaba/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2025-03-28 02:50:16 +03:00
Code

time: add suppot for fractional time specifications

Browse Source 
We can now parse "0.5s" as the same as "500ms". In fact, we can parse
"3.45years" correctly, too, and any other unit and fraction length.
This commit is contained in:
Lennart Poettering 2013-04-03 22:58:41 +02:00
parent d3b9e0ff4e
commit cb0dac0548
5 changed files with 177 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -123,6 +123,7 @@
/test-strbuf
/test-strv
/test-strxcpyx
/test-time
/test-udev
/test-unit-file
/test-unit-name

12
Makefile.am
View File

@ -1088,7 +1088,8 @@ noinst_tests += \
test-strip-tab-ansi \
test-cgroup-util \
test-prioq \
test-fileio
test-fileio \
test-time
EXTRA_DIST += \
test/sched_idle_bad.service \
@ -1197,6 +1198,15 @@ test_fileio_CFLAGS = \
test_fileio_LDADD = \
libsystemd-core.la
test_time_SOURCES = \
src/test/test-time.c
test_time_CFLAGS = \
$(AM_CFLAGS)
test_time_LDADD = \
libsystemd-core.la
test_log_SOURCES = \
src/test/test-log.c

90
src/shared/time-util.c
View File

@ -534,15 +534,25 @@ int parse_sec(const char *t, usec_t *usec) {
const char *p;
usec_t r = 0;
bool something = false;
assert(t);
assert(usec);
p = t;
do {
long long l;
for (;;) {
long long l, z = 0;
char *e;
unsigned i;
unsigned i, n = 0;
p += strspn(p, WHITESPACE);
if (*p == 0) {
if (!something)
return -EINVAL;
break;
}
errno = 0;
l = strtoll(p, &e, 10);
@ -553,22 +563,45 @@ int parse_sec(const char *t, usec_t *usec) {
if (l < 0)
return -ERANGE;
if (e == p)
if (*e == '.') {
char *b = e + 1;
errno = 0;
z = strtoll(b, &e, 10);
if (errno > 0)
return -errno;
if (z < 0)
return -ERANGE;
if (e == b)
return -EINVAL;
n = e - b;
} else if (e == p)
return -EINVAL;
e += strspn(e, WHITESPACE);
for (i = 0; i < ELEMENTSOF(table); i++)
if (startswith(e, table[i].suffix)) {
r += (usec_t) l * table[i].usec;
usec_t k = (usec_t) z * table[i].usec;
for (; n > 0; n--)
k /= 10;
r += (usec_t) l * table[i].usec + k;
p = e + strlen(table[i].suffix);
something = true;
break;
}
if (i >= ELEMENTSOF(table))
return -EINVAL;
} while (*p != 0);
}
*usec = r;
@ -614,15 +647,25 @@ int parse_nsec(const char *t, nsec_t *nsec) {
const char *p;
nsec_t r = 0;
bool something = false;
assert(t);
assert(nsec);
p = t;
do {
long long l;
for (;;) {
long long l, z = 0;
char *e;
unsigned i;
unsigned i, n = 0;
p += strspn(p, WHITESPACE);
if (*p == 0) {
if (!something)
return -EINVAL;
break;
}
errno = 0;
l = strtoll(p, &e, 10);
@ -633,22 +676,45 @@ int parse_nsec(const char *t, nsec_t *nsec) {
if (l < 0)
return -ERANGE;
if (e == p)
if (*e == '.') {
char *b = e + 1;
errno = 0;
z = strtoll(b, &e, 10);
if (errno > 0)
return -errno;
if (z < 0)
return -ERANGE;
if (e == b)
return -EINVAL;
n = e - b;
} else if (e == p)
return -EINVAL;
e += strspn(e, WHITESPACE);
for (i = 0; i < ELEMENTSOF(table); i++)
if (startswith(e, table[i].suffix)) {
r += (nsec_t) l * table[i].nsec;
nsec_t k = (nsec_t) z * table[i].nsec;
for (; n > 0; n--)
k /= 10;
r += (nsec_t) l * table[i].nsec + k;
p = e + strlen(table[i].suffix);
something = true;
break;
}
if (i >= ELEMENTSOF(table))
return -EINVAL;
} while (*p != 0);
}
*nsec = r;

1
src/shared/time-util.h
View File

@ -22,6 +22,7 @@
***/
#include <stdio.h>
#include <inttypes.h>
typedef uint64_t usec_t;
typedef uint64_t nsec_t;

86
src/test/test-time.c Normal file
View File

@ -0,0 +1,86 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "time-util.h"
static void test_parse_sec(void) {
usec_t u;
assert_se(parse_sec("5s", &u) >= 0);
assert_se(u == 5 * USEC_PER_SEC);
assert_se(parse_sec("5s500ms", &u) >= 0);
assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
assert_se(parse_sec(" 5s 500ms ", &u) >= 0);
assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
assert_se(parse_sec(" 5.5s ", &u) >= 0);
assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
assert_se(parse_sec(" 5.5s 0.5ms ", &u) >= 0);
assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC + 500);
assert_se(parse_sec(" .22s ", &u) >= 0);
assert_se(u == 220 * USEC_PER_MSEC);
assert_se(parse_sec(" .50y ", &u) >= 0);
assert_se(u == USEC_PER_YEAR / 2);
assert_se(parse_sec("2.5", &u) >= 0);
assert_se(u == 2500 * USEC_PER_MSEC);
assert_se(parse_sec(".7", &u) >= 0);
assert_se(u == 700 * USEC_PER_MSEC);
assert_se(parse_sec(" xyz ", &u) < 0);
assert_se(parse_sec("", &u) < 0);
assert_se(parse_sec(" . ", &u) < 0);
assert_se(parse_sec(" 5. ", &u) < 0);
assert_se(parse_sec(".s ", &u) < 0);
}
static void test_parse_nsec(void) {
nsec_t u;
assert_se(parse_nsec("5s", &u) >= 0);
assert_se(u == 5 * NSEC_PER_SEC);
assert_se(parse_nsec("5s500ms", &u) >= 0);
assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
assert_se(parse_nsec(" 5s 500ms ", &u) >= 0);
assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
assert_se(parse_nsec(" 5.5s ", &u) >= 0);
assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
assert_se(parse_nsec(" 5.5s 0.5ms ", &u) >= 0);
assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC + 500 * NSEC_PER_USEC);
assert_se(parse_nsec(" .22s ", &u) >= 0);
assert_se(u == 220 * NSEC_PER_MSEC);
assert_se(parse_nsec(" .50y ", &u) >= 0);
assert_se(u == NSEC_PER_YEAR / 2);
assert_se(parse_nsec("2.5", &u) >= 0);
assert_se(u == 2);
assert_se(parse_nsec(".7", &u) >= 0);
assert_se(u == 0);
assert_se(parse_nsec(" xyz ", &u) < 0);
assert_se(parse_nsec("", &u) < 0);
assert_se(parse_nsec(" . ", &u) < 0);
assert_se(parse_nsec(" 5. ", &u) < 0);
assert_se(parse_nsec(".s ", &u) < 0);
}
int main(int argc, char *argv[]) {
test_parse_sec();
test_parse_nsec();
return 0;
}