MINOR: chunks: add chunk_memcpy() and chunk_memcat()
These two functions respectively copy a memory area onto the chunk, and
append the contents of a memory area over a chunk. They are convenient
to prepare binary output data to be sent and will be used for HTTP/2.
diff --git a/include/common/chunk.h b/include/common/chunk.h
index 8c067f7..1f89e9b 100644
--- a/include/common/chunk.h
+++ b/include/common/chunk.h
@@ -98,6 +98,33 @@
chk->size = 0; /* mark it read-only */
}
+/* copies memory area <src> into <chk> for <len> bytes. Returns 0 in
+ * case of failure. No trailing zero is added.
+ */
+static inline int chunk_memcpy(struct chunk *chk, const char *src, size_t len)
+{
+ if (unlikely(len >= chk->size))
+ return 0;
+
+ chk->len = len;
+ memcpy(chk->str, src, len);
+
+ return 1;
+}
+
+/* appends memory area <src> after <chk> for <len> bytes. Returns 0 in
+ * case of failure. No trailing zero is added.
+ */
+static inline int chunk_memcat(struct chunk *chk, const char *src, size_t len)
+{
+ if (unlikely(chk->len < 0 || chk->len + len >= chk->size))
+ return 0;
+
+ memcpy(chk->str + chk->len, src, len);
+ chk->len += len;
+ return 1;
+}
+
/* copies str into <chk> followed by a trailing zero. Returns 0 in
* case of failure.
*/