nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
diff --git a/src/core/ngx_buf.c b/src/core/ngx_buf.c
new file mode 100644
index 0000000..90973a6
--- /dev/null
+++ b/src/core/ngx_buf.c
@@ -0,0 +1,154 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size)
+{
+ ngx_buf_t *b;
+
+ if (!(b = ngx_calloc_buf(pool))) {
+ return NULL;
+ }
+
+ if (!(b->start = ngx_palloc(pool, size))) {
+ return NULL;
+ }
+
+ b->pos = b->start;
+ b->last = b->start;
+ b->end = b->last + size;
+ b->temporary = 1;
+
+ /*
+ b->file_pos = 0;
+ b->file_last = 0;
+
+ b->file = NULL;
+ b->shadow = NULL;
+
+ b->tag = 0;
+ */
+
+ return b;
+}
+
+
+ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs)
+{
+ u_char *p;
+ ngx_int_t i;
+ ngx_buf_t *b;
+ ngx_chain_t *chain, *cl, **ll;
+
+ if (!(p = ngx_palloc(pool, bufs->num * bufs->size))) {
+ return NULL;
+ }
+
+ ll = &chain;
+
+ for (i = 0; i < bufs->num; i++) {
+ if (!(b = ngx_calloc_buf(pool))) {
+ return NULL;
+ }
+
+ b->pos = p;
+ b->last = p;
+ b->temporary = 1;
+
+ b->start = p;
+ p += bufs->size;
+ b->end = p;
+
+ /*
+ b->file_pos = 0;
+ b->file_last = 0;
+
+ b->file = NULL;
+ b->shadow = NULL;
+ b->tag = 0;
+ */
+
+ if (!(cl = ngx_alloc_chain_link(pool))) {
+ return NULL;
+ }
+
+ cl->buf = b;
+ *ll = cl;
+ ll = &cl->next;
+ }
+
+ *ll = NULL;
+
+ return chain;
+}
+
+
+int ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
+{
+ ngx_chain_t *cl, **ll;
+
+ ll = chain;
+
+ for (cl = *chain; cl; cl = cl->next) {
+ ll = &cl->next;
+ }
+
+ while (in) {
+ ngx_test_null(cl, ngx_alloc_chain_link(pool), NGX_ERROR);
+
+ cl->buf = in->buf;
+ *ll = cl;
+ ll = &cl->next;
+ in = in->next;
+ }
+
+ *ll = NULL;
+
+ return NGX_OK;
+}
+
+
+void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
+ ngx_chain_t **out, ngx_buf_tag_t tag)
+{
+ ngx_chain_t *tl;
+
+ if (*busy == NULL) {
+ *busy = *out;
+
+ } else {
+ for (tl = *busy; /* void */ ; tl = tl->next) {
+ if (tl->next == NULL) {
+ tl->next = *out;
+ break;
+ }
+ }
+ }
+
+ *out = NULL;
+
+ while (*busy) {
+ if (ngx_buf_size((*busy)->buf) != 0) {
+ break;
+ }
+
+#if (HAVE_WRITE_ZEROCOPY)
+ if ((*busy)->buf->zerocopy_busy) {
+ break;
+ }
+#endif
+
+ if ((*busy)->buf->tag != tag) {
+ *busy = (*busy)->next;
+ continue;
+ }
+
+ (*busy)->buf->pos = (*busy)->buf->last = (*busy)->buf->start;
+
+ tl = *busy;
+ *busy = (*busy)->next;
+ tl->next = *free;
+ *free = tl;
+ }
+}
