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	allocator.c - libzahl - big integer library
	git clone git://git.suckless.org/libzahl
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	allocator.c (615B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "internals.h"
	3
	4
	5 void
	6 libzahl_realloc(z_t a, size_t need)
	7 {
	8 size_t i, new_size = 1;
	9 zahl_char_t *new;
	10
	11 new_size <<= i = libzahl_msb_nz_zu(need);
	12 if (likely(new_size != need)) {
	13 i += 1;
	14 new_size <<= 1;
	15 }
	16
	17 if (likely(libzahl_pool_n[i])) {
	18 libzahl_pool_n[i]--;
	19 new = libzahl_pool[i][libzahl_pool_n[i]];
	20 zmemcpy(new, a->chars, a->alloced);
	21 zfree(a);
	22 a->chars = new;
	23 } else {
	24 a->chars = realloc(a->chars, (new_size + ZAHL_FLUFF) * s…
	25 if (check(!a->chars))
	26 libzahl_memfailure();
	27 }
	28 a->alloced = new_size;
	29 }