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Add p_grow. 

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
This commit is contained in:
Pierre Habouzit 2008-06-22 13:30:39 +02:00
parent d42cdc47c3
commit f055e4a13b
1 changed files with 13 additions and 0 deletions
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13
common/util.h
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@ -64,10 +64,23 @@ typedef struct
#define ssizeof(foo) (ssize_t)sizeof(foo)
#define countof(foo) (ssizeof(foo) / ssizeof(foo[0]))
#define p_alloc_nr(x) (((x) + 16) * 3 / 2)
#define p_new(type, count) ((type *)xmalloc(sizeof(type) * (count)))
#define p_clear(p, count) ((void)memset((p), 0, sizeof(*(p)) * (count)))
#define p_realloc(pp, count) xrealloc((void*)(pp), sizeof(**(pp)) * (count))
#define p_dup(p, count) xmemdup((p), sizeof(*(p)) * (count))
#define p_grow(pp, goalnb, allocnb) \
do { \
if ((goalnb) > *(allocnb)) { \
if (p_alloc_nr(*(allocnb)) < (goalnb)) { \
*(allocnb) = (goalnb); \
} else { \
*(allocnb) = p_alloc_nr(*(allocnb)); \
} \
p_realloc(pp, *(allocnb)); \
} \
} while (0)
#ifdef __GNUC__