X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fofpbuf.h;h=442c90c9134f1224625bbeed7a7aa58ccdc4feef;hb=f9ef1c31cfcd2d9ded66588a11c59e29e5aaa2ca;hp=7d106d888d551e38c26dead9e84019e3cf61d213;hpb=b3907fbc6c74ddad7507d0f7abb1f5a2528cd2be;p=openvswitch

diff --git a/lib/ofpbuf.h b/lib/ofpbuf.h
index 7d106d88..442c90c9 100644
--- a/lib/ofpbuf.h
+++ b/lib/ofpbuf.h
@@ -18,17 +18,26 @@
 #define OFPBUF_H 1
 
 #include <stddef.h>
+#include <stdint.h>
 #include "list.h"
+#include "util.h"
 
 #ifdef  __cplusplus
 extern "C" {
 #endif
 
+enum ofpbuf_source {
+    OFPBUF_MALLOC,              /* Obtained via malloc(). */
+    OFPBUF_STACK,               /* Stack space or static buffer. */
+    OFPBUF_CONST                /* Must not be expanded. */
+};
+
 /* Buffer for holding arbitrary data.  An ofpbuf is automatically reallocated
  * as necessary if it grows too large for the available memory. */
 struct ofpbuf {
-    void *base;                 /* First byte of area malloc()'d area. */
+    void *base;                 /* First byte of allocated space. */
     size_t allocated;           /* Number of bytes allocated. */
+    enum ofpbuf_source source;  /* Source of memory allocated as 'base'. */
 
     void *data;                 /* First byte actually in use. */
     size_t size;                /* Number of bytes in use. */
@@ -42,7 +51,13 @@ struct ofpbuf {
     void *private_p;            /* Private pointer for use by owner. */
 };
 
+/* Declares NAME as a SIZE-byte array aligned properly for storing any kind of
+ * data.  For use with ofpbuf_use_stack(). */
+#define OFPBUF_STACK_BUFFER(NAME, SIZE) uint64_t NAME[DIV_ROUND_UP(SIZE, 8)]
+
 void ofpbuf_use(struct ofpbuf *, void *, size_t);
+void ofpbuf_use_stack(struct ofpbuf *, void *, size_t);
+void ofpbuf_use_const(struct ofpbuf *, const void *, size_t);
 
 void ofpbuf_init(struct ofpbuf *, size_t);
 void ofpbuf_uninit(struct ofpbuf *);
@@ -54,6 +69,8 @@ struct ofpbuf *ofpbuf_clone(const struct ofpbuf *);
 struct ofpbuf *ofpbuf_clone_with_headroom(const struct ofpbuf *,
                                           size_t headroom);
 struct ofpbuf *ofpbuf_clone_data(const void *, size_t);
+struct ofpbuf *ofpbuf_clone_data_with_headroom(const void *, size_t,
+                                               size_t headroom);
 void ofpbuf_delete(struct ofpbuf *);
 
 void *ofpbuf_at(const struct ofpbuf *, size_t offset, size_t size);
@@ -64,6 +81,7 @@ void *ofpbuf_end(const struct ofpbuf *);
 void *ofpbuf_put_uninit(struct ofpbuf *, size_t);
 void *ofpbuf_put_zeros(struct ofpbuf *, size_t);
 void *ofpbuf_put(struct ofpbuf *, const void *, size_t);
+char *ofpbuf_put_hex(struct ofpbuf *, const char *s, size_t *n);
 void ofpbuf_reserve(struct ofpbuf *, size_t);
 void *ofpbuf_push_uninit(struct ofpbuf *b, size_t);
 void *ofpbuf_push_zeros(struct ofpbuf *, size_t);