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#include <ngx_types.h>
#include <ngx_hunk.h>
ngx_hunk_t *ngx_get_hunk(ngx_pool_t *pool, int size, int before, int after)
{
ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
#ifndef OFF_EQUAL_PTR
h->pos.f = h->last.f = 0;
#endif
h->pre_start = ngx_palloc(pool, size + before + after);
h->start = h->pos.p = h->last.p = h->pre_start + before;
h->end = h->last.p + size;
h->post_end = h->end + after;
h->type = NGX_HUNK_TEMP;
h->tag = 0;
h->fd = (ngx_file_t) -1;
return h;
}
ngx_hunk_t *ngx_get_hunk_before(ngx_pool_t *pool, ngx_hunk_t *hunk, int size)
{
ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
#ifndef OFF_EQUAL_PTR
h->pos.f = h->last.f = 0;
#endif
if (hunk->type & NGX_HUNK_TEMP && hunk->pos.p - hunk->pre_start >= size) {
/* keep hunk->start unchanged - used in restore */
h->pre_start = hunk->pre_start;
h->end = h->post_end = hunk->pre_start = hunk->pos.p;
h->start = h->pos.p = h->last.p = h->end - size;
h->type = NGX_HUNK_TEMP;
h->tag = 0;
h->fd = (ngx_file_t) -1;
} else {
h->pre_start = h->start = h->pos.p = h->last.p = ngx_palloc(pool, size);
h->end = h->post_end = h->start + size;
h->type = NGX_HUNK_TEMP;
h->tag = 0;
h->fd = (ngx_file_t) -1;
}
return h;
}
ngx_hunk_t *ngx_get_hunk_after(ngx_pool_t *pool, ngx_hunk_t *hunk, int size)
{
ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
#ifndef OFF_EQUAL_PTR
h->pos.f = h->last.f = 0;
#endif
if (hunk->type & NGX_HUNK_TEMP
&& hunk->last.p == hunk->end
&& hunk->post_end - hunk->end >= size)
{
h->post_end = hunk->post_end;
h->pre_start = h->start = h->pos.p = h->last.p = hunk->post_end =
hunk->last.p;
h->type = NGX_HUNK_TEMP;
h->tag = 0;
h->fd = (ngx_file_t) -1;
} else {
h->pre_start = h->start = h->pos.p = h->last.p = ngx_palloc(pool, size);
h->end = h->post_end = h->start + size;
h->type = NGX_HUNK_TEMP;
h->tag = 0;
h->fd = (ngx_file_t) -1;
}
return h;
}
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