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Add ARRAY convenience macros

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Because dynamically allocated arrays in C are a pain.
This commit is contained in:
Přemysl Eric Janouch 2017-01-23 22:47:20 +01:00
parent 74b00a921a
commit 973a4b7656
Signed by: p
GPG Key ID: B715679E3A361BE6
1 changed files with 17 additions and 0 deletions
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liberty.c
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@ -301,6 +301,23 @@ xstrndup (const char *s, size_t n)
return copy;
}
// --- Simple array support ----------------------------------------------------
// The most basic helper macros to make working with arrays not suck
#define ARRAY(type, name) type *name; size_t name ## _len, name ## _size;
#define ARRAY_INIT_SIZED(a, n) \
BLOCK_START \
(a) = xcalloc (sizeof *(a), (a ## _size) = (n)); \
(a ## _len) = 0; \
BLOCK_END
#define ARRAY_INIT(a) ARRAY_INIT_SIZED (a, 16)
#define ARRAY_RESERVE(a, n) \
BLOCK_START \
while ((a ## _size) - (a ## _len) < n) \
(a) = xreallocarray ((a), sizeof *(a), (a ## _size) <<= 1); \
BLOCK_END
// --- Double-linked list helpers ----------------------------------------------
#define LIST_HEADER(type) \