move exmple/c/* to example/

example/c/cmake/CMakeLists.txt => example/cmake/CMakeLists.txt
example/c/lib_buffer_unpack.c => example/lib_buffer_unpack.c
example/c/simple_c.c => example/simple_c.c
example/c/speed_test_uint32_array.c => example/speed_test_uint32_array.c
example/c/speed_test_uint64_array.c => example/speed_test_uint64_array.c
example/c/user_buffer_unpack.c => example/user_buffer_unpack.c

Use `git log --follow example/filename` to see full log

example/lib_buffer_unpack.c

@@ -0,0 +1,127 @@
+#include <msgpack.h>
+#include <stdio.h>
+#include <assert.h>
+
+
+typedef struct receiver {
+    msgpack_sbuffer sbuf;
+    size_t rest;
+} receiver;
+
+void receiver_init(receiver *r) {
+    msgpack_packer pk;
+
+    msgpack_sbuffer_init(&r->sbuf);
+    msgpack_packer_init(&pk, &r->sbuf, msgpack_sbuffer_write);
+    /* 1st object */
+    msgpack_pack_array(&pk, 3);
+    msgpack_pack_int(&pk, 1);
+    msgpack_pack_true(&pk);
+    msgpack_pack_str(&pk, 7);
+    msgpack_pack_str_body(&pk, "example", 7);
+    /* 2nd object */
+    msgpack_pack_str(&pk, 6);
+    msgpack_pack_str_body(&pk, "second", 6);
+    /* 3rd object */
+    msgpack_pack_array(&pk, 2);
+    msgpack_pack_int(&pk, 42);
+    msgpack_pack_false(&pk);
+    r->rest = r->sbuf.size;
+}
+
+size_t receiver_recv(receiver *r, char* buf, size_t try_size) {
+    size_t off = r->sbuf.size - r->rest;
+
+    size_t actual_size = try_size;
+    if (actual_size > r->rest) actual_size = r->rest;
+
+    memcpy(buf, r->sbuf.data + off, actual_size);
+    r->rest -= actual_size;
+
+    return actual_size;
+}
+
+size_t receiver_to_unpacker(receiver* r, size_t request_size,
+        msgpack_unpacker *unpacker)
+{
+    size_t recv_len;
+    // make sure there's enough room, or expand the unpacker accordingly
+    if (msgpack_unpacker_buffer_capacity(unpacker) < request_size) {
+        msgpack_unpacker_reserve_buffer(unpacker, request_size);
+        assert(msgpack_unpacker_buffer_capacity(unpacker) >= request_size);
+    }
+    recv_len = receiver_recv(r, msgpack_unpacker_buffer(unpacker),
+                             request_size);
+    msgpack_unpacker_buffer_consumed(unpacker, recv_len);
+    return recv_len;
+}
+
+#define EACH_RECV_SIZE 4
+
+void unpack(receiver* r) {
+    /* buf is allocated by unpacker. */
+    msgpack_unpacker* unp = msgpack_unpacker_new(100);
+    msgpack_unpacked result;
+    msgpack_unpack_return ret;
+    size_t recv_len;
+    int recv_count = 0;
+    int i = 0;
+
+    msgpack_unpacked_init(&result);
+    while (true) {
+        recv_len = receiver_to_unpacker(r, EACH_RECV_SIZE, unp);
+        if (recv_len == 0) break; // (reached end of input)
+#if defined(_MSC_VER) || defined(__MINGW32__)
+        printf("receive count: %d %Id bytes received.\n", recv_count++, recv_len);
+#else // defined(_MSC_VER) || defined(__MINGW32__)
+        printf("receive count: %d %zd bytes received.\n", recv_count++, recv_len);
+#endif // defined(_MSC_VER) || defined(__MINGW32__)
+        ret = msgpack_unpacker_next(unp, &result);
+        while (ret == MSGPACK_UNPACK_SUCCESS) {
+            msgpack_object obj = result.data;
+
+            /* Use obj. */
+            printf("Object no %d:\n", ++i);
+            msgpack_object_print(stdout, obj);
+            printf("\n");
+            /* If you want to allocate something on the zone, you can use zone. */
+            /* msgpack_zone* zone = result.zone; */
+            /* The lifetime of the obj and the zone,  */
+
+            ret = msgpack_unpacker_next(unp, &result);
+        }
+        if (ret == MSGPACK_UNPACK_PARSE_ERROR) {
+            printf("The data in the buf is invalid format.\n");
+            msgpack_unpacked_destroy(&result);
+            return;
+        }
+    }
+    msgpack_unpacked_destroy(&result);
+    msgpack_unpacker_free(unp);
+}
+
+int main(void) {
+    receiver r;
+    receiver_init(&r);
+
+    unpack(&r);
+
+    return 0;
+}
+
+/* Output */
+
+/*
+receive count: 0 4 bytes received.
+receive count: 1 4 bytes received.
+receive count: 2 4 bytes received.
+Object no 1:
+[1, true, "example"]
+receive count: 3 4 bytes received.
+receive count: 4 4 bytes received.
+Object no 2:
+"second"
+receive count: 5 1 bytes received.
+Object no 3:
+[42, false]
+*/