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