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114 lines
2.3 KiB
114 lines
2.3 KiB
2 months ago
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/*
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* UCW Library -- A simple growing array of an arbitrary type
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*
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* (c) 2010--2014 Martin Mares <mj@ucw.cz>
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*/
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#undef LOCAL_DEBUG
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#include <ucw/lib.h>
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#include <ucw/gary.h>
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#include <string.h>
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struct gary_hdr gary_empty_hdr;
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void *
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gary_init(size_t elt_size, size_t num_elts, struct ucw_allocator *allocator)
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{
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DBG("GARY: Init to %zd elements", num_elts);
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struct gary_hdr *h = allocator->alloc(allocator, GARY_HDR_SIZE + elt_size * num_elts);
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h->num_elts = h->have_space = num_elts;
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h->elt_size = elt_size;
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h->allocator = allocator;
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return GARY_BODY(h);
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}
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static struct gary_hdr *
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gary_realloc(struct gary_hdr *h, size_t n)
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{
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size_t old_size = h->have_space;
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if (n > 2*h->have_space)
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h->have_space = n;
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else
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h->have_space *= 2;
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DBG("GARY: Resize from %zd to %zd elements (need %zd)", old_size, h->have_space, n);
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return h->allocator->realloc(h->allocator, h, GARY_HDR_SIZE + old_size * h->elt_size, GARY_HDR_SIZE + h->have_space * h->elt_size);
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}
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void *
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gary_set_size(void *array, size_t n)
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{
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struct gary_hdr *h = GARY_HDR(array);
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h->num_elts = n;
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if (n <= h->have_space)
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return array;
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h = gary_realloc(h, n);
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return GARY_BODY(h);
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}
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void *
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gary_push_helper(void *array, size_t n, byte **cptr)
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{
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struct gary_hdr *h = GARY_HDR(array);
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h = gary_realloc(h, h->num_elts);
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*cptr = GARY_BODY(h) + (h->num_elts - n) * h->elt_size;
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return GARY_BODY(h);
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}
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void *
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gary_fix(void *array)
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{
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struct gary_hdr *h = GARY_HDR(array);
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if (h->num_elts != h->have_space)
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{
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h = h->allocator->realloc(h->allocator, h, GARY_HDR_SIZE + h->have_space * h->elt_size, GARY_HDR_SIZE + h->num_elts * h->elt_size);
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h->have_space = h->num_elts;
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}
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return GARY_BODY(h);
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}
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#ifdef TEST
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#include <ucw/mempool.h>
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#include <stdio.h>
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int main(int argc, char **argv UNUSED)
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{
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int *a;
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struct mempool *mp = NULL;
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if (argc < 2)
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GARY_INIT_ZERO(a, 5);
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else
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{
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mp = mp_new(4096);
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GARY_INIT_ALLOC(a, 5, mp_get_allocator(mp));
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}
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for (int i=0; i<5; i++)
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{
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ASSERT(!a[i] || mp);
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a[i] = i+1;
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}
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GARY_PUSH(a);
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*GARY_PUSH(a) = 10;
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*GARY_PUSH(a) = 20;
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*GARY_PUSH(a) = 30;
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GARY_POP(a);
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GARY_FIX(a);
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for (int i=0; i<(int)GARY_SIZE(a); i++)
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printf("%d\n", a[i]);
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GARY_FREE(a);
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if (mp)
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mp_delete(mp);
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return 0;
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}
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#endif
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