allocator.c - libzahl - big integer library
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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) * sizeof(zahl_char_t));
           25                 if (check(!a->chars))
           26                         libzahl_memfailure();
           27         }
           28         a->alloced = new_size;
           29 }