Initial commitv0.1.0

libunit-wasm and example C and Rust WebAssembly modules for NGINX Unit.

Co-developed-by: Timo Stark <t.stark@nginx.com>
Co-developed-by: Liam Crilly <liam@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/examples/c/unit-wasm-raw.c b/examples/c/unit-wasm-raw.c
new file mode 100644
index 0000000..42ebcbf
--- /dev/null
+++ b/examples/c/unit-wasm-raw.c
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/*
+ * Copyright (C) Andrew Clayton
+ * Copyright (C) F5, Inc.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+
+#include "unit-wasm-raw.h"
+
+__attribute__((import_module("env"), import_name("nxt_wasm_send_headers")))
+void nxt_wasm_send_headers(u32 offset);
+
+void send_headers(u8 *addr, const char *ct, size_t len)
+{
+	struct resp_hdr *rh;
+	char clen[32];
+	u8 *p;
+	static const u32 hdr_offs = 0;
+
+	rh = (struct resp_hdr *)addr;
+
+#define SET_HDR_FIELD(idx, name, val) \
+	do { \
+		rh->fields[idx].name_offs = p - addr; \
+		rh->fields[idx].name_len = strlen(name); \
+		p = mempcpy(p, name, rh->fields[idx].name_len); \
+		rh->fields[idx].value_offs = p - addr; \
+		rh->fields[idx].value_len = strlen(val); \
+		p = mempcpy(p, val, rh->fields[idx].value_len); \
+	} while (0)
+
+	rh->nr_fields = 2;
+	p = addr + sizeof(struct resp_hdr) +
+	    (rh->nr_fields * sizeof(struct hdr_field));
+
+	SET_HDR_FIELD(0, "Content-Type", ct);
+	snprintf(clen, sizeof(clen), "%lu", len);
+	SET_HDR_FIELD(1, "Content-Length", clen);
+
+	nxt_wasm_send_headers(hdr_offs);
+}