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spa: add SPA_FOR_EACH_ELEMENT for array traversal

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This commit is contained in:
Peter Hutterer 2021-06-03 15:23:29 +10:00 • committed by Wim Taymans
parent 5a69a04cfe
commit 4d45182801
2 changed files with 37 additions and 0 deletions
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12
spa/include/spa/utils/defs.h
View file

@ -106,6 +106,18 @@ struct spa_fraction {
};
#define SPA_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))
/**
* Array iterator macro. Usage:
* ```c
* struct foo *array[16];
* struct foo *f;
* SPA_FOR_EACH_ELEMENT(array, f) {
* f->bar = baz;
* }
* ```
*/
#define SPA_FOR_EACH_ELEMENT(arr, ptr) \
for (ptr = arr; (void*)ptr < SPA_PTROFF(arr, sizeof(arr), void); ptr++)
#define SPA_MIN(a,b) \
({ \

25
spa/tests/test-utils.c
View file

@ -139,6 +139,10 @@ static void test_abi(void)
static void test_macros(void)
{
uint8_t ptr[64];
uint16_t i16[14];
uint32_t i32[10];
uint64_t i64[12];
unsigned char c[16];
spa_assert(SPA_MIN(1, 2) == 1);
spa_assert(SPA_MIN(1, -2) == -2);
@ -155,6 +159,27 @@ static void test_macros(void)
spa_assert(SPA_MEMBER(ptr, 0, void) == SPA_PTROFF(ptr, 0, void));
spa_assert(SPA_MEMBER_ALIGN(ptr, 0, 4, void) == SPA_PTROFF_ALIGN(ptr, 0, 4, void));
spa_assert(SPA_MEMBER_ALIGN(ptr, 4, 32, void) == SPA_PTROFF_ALIGN(ptr, 4, 32, void));
spa_assert(SPA_N_ELEMENTS(ptr) == 64);
spa_assert(SPA_N_ELEMENTS(i32) == 10);
spa_assert(SPA_N_ELEMENTS(i64) == 12);
spa_assert(SPA_N_ELEMENTS(i16) == 14);
spa_assert(SPA_N_ELEMENTS(c) == 16);
#define check_traversal(array_) \
{ \
__typeof__(array_[0]) *it; \
int count = 0; \
SPA_FOR_EACH_ELEMENT(array_, it) \
*it = count++; \
for (size_t i = 0; i < SPA_N_ELEMENTS(array_); i++) \
spa_assert(array_[i] == i); \
}
check_traversal(ptr);
check_traversal(i64);
check_traversal(i32);
check_traversal(i16);
check_traversal(c);
}
static void test_result(void)