Mercurial > hg > nginx-quic
diff src/core/ngx_hunk.c @ 0:4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
The first code that uses "ngx_" prefix, the previous one used "gx_" prefix.
At that point the code is not yet usable. The first draft ideas are dated
back to 23.10.2001.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 06 Aug 2002 16:39:45 +0000 |
parents | |
children | d220029ac7f3 |
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new file mode 100644 --- /dev/null +++ b/src/core/ngx_hunk.c @@ -0,0 +1,85 @@ + +#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; +}