cosmopolitan/libc/bits/safemacros.internal.h

88 lines
2.7 KiB
C

#ifndef COSMOPOLITAN_LIBC_BITS_SAFEMACROS_H_
#define COSMOPOLITAN_LIBC_BITS_SAFEMACROS_H_
#ifndef __STRICT_ANSI__
#include "libc/macros.h"
#include "libc/runtime/runtime.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
long min(long, long);
long max(long, long);
long roundup(long, long);
long rounddown(long, long);
bool isempty(const char *);
const char *nulltoempty(const char *);
const char *emptytonull(const char *);
const char *firstnonnull(const char *, const char *);
uint64_t(unsignedsubtract)(uint64_t, uint64_t) pureconst;
#if !defined(__STRICT_ANSI__) && defined(__GNUC__)
#define min(x, y) \
({ \
autotype(x) MinX = (x); \
autotype(y) MinY = (y); \
MinX < MinY ? MinX : MinY; \
})
#define max(x, y) \
({ \
autotype(x) MaxX = (x); \
autotype(y) MaxY = (y); \
MaxX > MaxY ? MaxX : MaxY; \
})
#define roundup(x, k) \
({ \
autotype(x) RoundupX = (x); \
autotype(k) RoundupK = (k); \
ROUNDUP(RoundupX, RoundupK); \
})
#define rounddown(x, k) \
({ \
autotype(x) RounddownX = (x); \
autotype(k) RounddownK = (k); \
ROUNDDOWN(RounddownX, RounddownK); \
})
#define isempty(s) \
({ \
autotype(s) IsEmptyS = (s); \
!IsEmptyS || !(*IsEmptyS); \
})
#define nulltoempty(s) \
({ \
autotype(s) NullToEmptyS = (s); \
NullToEmptyS ? NullToEmptyS : ""; \
})
#define firstnonnull(a, b) \
({ \
autotype(a) FirstNonNullA = (a); \
autotype(a) FirstNonNullB = (b); \
if (!FirstNonNullA && !FirstNonNullB) abort(); \
FirstNonNullA ? FirstNonNullA : FirstNonNullB; \
})
#define emptytonull(s) \
({ \
autotype(s) EmptyToNullS = (s); \
EmptyToNullS && !(*EmptyToNullS) ? NULL : EmptyToNullS; \
})
#define unsignedsubtract(a, b) \
({ \
uint64_t UnsubA = (a); \
uint64_t UnsubB = (b); \
UnsubA >= UnsubB ? UnsubA - UnsubB : ~UnsubB + UnsubA + 1; \
})
#endif /* GNU && !ANSI */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* !ANSI */
#endif /* COSMOPOLITAN_LIBC_BITS_SAFEMACROS_H_ */