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macro: make ALIGN4() and ALIGN8() also return SIZE_MAX on overflow

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This also drops unused ALIGN4_PTR(), ALIGN8_PTR(), and ALIGN_TO_PTR().
This commit is contained in:
Yu Watanabe
2022-06-01 03:40:20 +09:00
parent 394129f88b
commit 4c8d7caf1a
2 changed files with 8 additions and 19 deletions
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src/basic/macro.h
-19
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@@ -110,25 +110,6 @@
#error "neither int nor long are four bytes long?!?"
#endif
/* Rounds up */
#define ALIGN4(l) (((l) + 3) & ~3)
#define ALIGN8(l) (((l) + 7) & ~7)
#if __SIZEOF_POINTER__ == 8
#define ALIGN(l) ALIGN8(l)
#elif __SIZEOF_POINTER__ == 4
#define ALIGN(l) ALIGN4(l)
#else
#error "Wut? Pointers are neither 4 nor 8 bytes long?"
#endif
#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) (p)))
#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) (p)))
#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) (p)))
#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) (p), (ali)))
/* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */
static inline unsigned long ALIGN_POWER2(unsigned long u) {