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Justine Tunney 2020-06-15 07:18:57 -07:00
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libc/alg/arraylist2.h Normal file
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#ifndef COSMOPOLITAN_LIBC_ALG_ARRAYLIST2_H_
#define COSMOPOLITAN_LIBC_ALG_ARRAYLIST2_H_
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/* TODO(jart): Fully develop these better macros. */
#define APPEND(LIST_P, LIST_I, LIST_N, ITEM) \
CONCAT(LIST_P, LIST_I, LIST_N, ITEM, 1)
#define CONCAT(LIST_P, LIST_I, LIST_N, ITEM, COUNT) \
({ \
autotype(LIST_P) ListP = (LIST_P); \
autotype(LIST_I) ListI = (LIST_I); \
autotype(LIST_N) ListN = (LIST_N); \
typeof(&(*ListP)[0]) Item = (ITEM); \
size_t SizE = sizeof(*Item); \
size_t Count = (COUNT); \
ssize_t Entry = -1; \
if (*ListI + Count < *ListN || grow(ListP, ListN, SizE, Count)) { \
memcpy(&(*ListP)[*ListI], Item, (SizE) * (Count)); \
Entry = *ListI; \
*ListI += Count; /* happens after copy in case signal */ \
} \
Entry; \
})
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_ALG_ARRAYLIST2_H_ */