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spa: add a new string helper with spa_strtol()

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Most of the time when we convert a string to an integer we only care about
success. Let's wrap this with a helper function that sets the value to the
result and returns true on success.
This commit is contained in:
Peter Hutterer 2021-05-14 10:20:09 +10:00 • committed by Wim Taymans
parent 0504ebffeb
commit 5aa15d10e9
2 changed files with 116 additions and 0 deletions
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67
spa/include/spa/utils/string.h Normal file
View file

@ -0,0 +1,67 @@
/* Simple Plugin API
*
* Copyright © 2021 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_UTILS_STRING_H
#define SPA_UTILS_STRING_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <errno.h>
/**
* Convert \a str to an int32_t with the given \a base and store the
* result in \a val.
*
* On failure, the value of \a val is undefined.
*
* \return true on success, false otherwise
*/
static inline bool spa_atoi32(const char *str, int32_t *val, int base)
{
char *endptr;
long v;
if (!str || *str =='\0')
return false;
errno = 0;
v = strtol(str, &endptr, base);
if (errno != 0 || *endptr != '\0')
return false;
if (v != (int32_t)v)
return false;
*val = v;
return true;
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_UTILS_STRING_H */

49
spa/tests/test-utils.c
View file

@ -28,6 +28,7 @@
#include <spa/utils/list.h>
#include <spa/utils/hook.h>
#include <spa/utils/ringbuffer.h>
#include <spa/utils/string.h>
#include <spa/utils/type.h>
static void test_abi(void)
@ -429,6 +430,53 @@ static void test_ringbuffer(void)
spa_assert(!memcmp(buffer, " !!!o pipewire rocks", 20));
}
static void test_strtol(void)
{
int32_t v;
spa_assert(spa_atoi32("0", &v, 0) && v == 0);
spa_assert(spa_atoi32("0", &v, 16) && v == 0);
spa_assert(spa_atoi32("0", &v, 32) && v == 0);
spa_assert(spa_atoi32("-1", &v, 0) && v == -1);
spa_assert(spa_atoi32("-1234", &v, 0) && v == -1234);
spa_assert(spa_atoi32("-2147483648", &v, 0) && v == -2147483648);
spa_assert(spa_atoi32("+1", &v, 0) && v == 1);
spa_assert(spa_atoi32("+1234", &v, 0) && v == 1234);
spa_assert(spa_atoi32("+2147483647", &v, 0) && v == 2147483647);
spa_assert(spa_atoi32("65535", &v, 0) && v == 0xffff);
spa_assert(spa_atoi32("65535", &v, 10) && v == 0xffff);
spa_assert(spa_atoi32("65535", &v, 16) && v == 0x65535);
spa_assert(spa_atoi32("0xff", &v, 0) && v == 0xff);
spa_assert(spa_atoi32("0xff", &v, 16) && v == 0xff);
v = 0xabcd;
spa_assert(!spa_atoi32("0xff", &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32("fabc", &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32("fabc", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("124bogus", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("124bogus", &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32("124bogus", &v, 16) && v == 0xabcd);
spa_assert(!spa_atoi32("0xbogus", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("bogus", &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32("bogus", &v, 16) && v == 0xabcd);
spa_assert(!spa_atoi32("", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("", &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32("", &v, 16) && v == 0xabcd);
spa_assert(!spa_atoi32(" ", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32(" ", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("-2147483649", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("2147483648", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("9223372036854775807", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("-9223372036854775808", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32("9223372036854775808999", &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32(NULL, &v, 0) && v == 0xabcd);
spa_assert(!spa_atoi32(NULL, &v, 10) && v == 0xabcd);
spa_assert(!spa_atoi32(NULL, &v, 16) && v == 0xabcd);
}
int main(int argc, char *argv[])
{
test_abi();
@ -438,5 +486,6 @@ int main(int argc, char *argv[])
test_list();
test_hook();
test_ringbuffer();
test_strtol();
return 0;
}