From 462d1982f299c8be4ae9a746e6ae7d04c04faa33 Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Tue, 4 Aug 2015 14:41:22 +0800
Subject: add embedding_example

---
 embedding_example/main.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 embedding_example/main.c

(limited to 'embedding_example/main.c')

diff --git a/embedding_example/main.c b/embedding_example/main.c
new file mode 100644
index 0000000..4e70892
--- /dev/null
+++ b/embedding_example/main.c
@@ -0,0 +1,95 @@
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+#include "matrix/matrix.h"
+#include "common.h"
+#include "luaT/luaT.h"
+#include <stdio.h>
+
+const char *nerv_matrix_host_float_tname = "nerv.MMatrixFloat";
+extern Matrix *nerv_matrix_host_float_create(long nrow, long ncol, Status *status);
+extern void nerv_matrix_host_float_data_retain(Matrix *self);
+extern void nerv_matrix_host_float_data_free(Matrix *self, Status *status);
+
+lua_State *L;
+Matrix *input, *output;
+Status status;
+
+void setup_nerv() {
+    L = lua_open();
+    luaL_openlibs(L);
+    luaL_loadfile(L, "setup_nerv.lua");
+    /* network configuration */
+    lua_pushstring(L, "swb_baseline_decode.lua");
+    if (lua_pcall(L, 1, LUA_MULTRET, 0))
+    {
+        printf("%s\n", luaL_checkstring(L, 1));
+        exit(1);
+    }
+    /* lua stack now: input width, output width, propagator */
+    input = nerv_matrix_host_float_create(1, luaL_checkinteger(L, 1), &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+    output = nerv_matrix_host_float_create(1, luaL_checkinteger(L, 2), &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+}
+
+
+void propagate(float for_fun) {
+    int i, j;
+    printf("ok: %d\n", lua_gettop(L));
+    lua_pushvalue(L, 3);
+    /* lua stack now: input width, output width, propagator, propagator */
+    for (i = 0; i < input->nrow; i++) /* nrow is actually 1 */
+    {
+        float *nerv_row = (float *)((char *)input->data.f + i * input->stride);
+        for (j = 0; j < input->ncol; j++)
+        {
+            nerv_row[j] = j * for_fun;
+        }
+    }
+    /* avoid gc */
+    nerv_matrix_host_float_data_retain(input);
+    nerv_matrix_host_float_data_retain(input);
+    nerv_matrix_host_float_data_retain(input);
+    nerv_matrix_host_float_data_retain(input);
+    nerv_matrix_host_float_data_retain(output);
+    nerv_matrix_host_float_data_retain(output);
+    nerv_matrix_host_float_data_retain(output);
+    nerv_matrix_host_float_data_retain(output);
+
+    luaT_pushudata(L, input, nerv_matrix_host_float_tname);
+    luaT_pushudata(L, output, nerv_matrix_host_float_tname);
+    /* lua stack now: input width, output width, propagator, propagator, input, output */
+    if (lua_pcall(L, 2, 0, 0)) /* call propagator with two parameters */
+    {
+        printf("%s\n", luaL_checkstring(L, -1));
+        exit(-1);
+    }
+    /* lua stack now: input width, output width, propagator */
+    printf("## caller ##\n");
+    for (i = 0; i < output->nrow; i++) /* nrow is actually 1 */
+    {
+        float *nerv_row = (float *)((char *)output->data.f + i * output->stride);
+        for (j = 0; j < output->ncol; j++)
+        {
+            printf("%.8f ", nerv_row[j]);
+        }
+        printf("\n");
+    }
+}
+
+void teardown_nerv() {
+    nerv_matrix_host_float_data_free(input, &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+    nerv_matrix_host_float_data_free(output, &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+}
+
+int main() {
+    setup_nerv();
+    propagate(1.0);
+    propagate(2.0);
+    propagate(3.0);
+    teardown_nerv();
+    return 0;
+}
-- 
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