.

doc/BYTECODE

@@ -21,10 +21,10 @@ The bytecode file is composed of the following sections:
        [1..4]: real
 
  * CODE
+   [0:3]: Debug start address (or zero)
+   [4:7]: Number of functions
    Each function:
      [0:3] Address of next function
-     [4:5] Number of parameters
-     [6:7] Number of variables
      [...] Code
        [0] : Opcode
        [between 1 and 4] : Operand

lib/code.c

@@ -1,9 +1,42 @@
 #include "priv.h"
 
-Code* code_load_bytecode(uint8_t* bytecode, size_t bytecode_sz)
+#include <stdlib.h>
+
+struct Code {
+};
+
+Code* code_new(uint8_t* bytecode, size_t bytecode_sz)
 {
+    Code* code = xcalloc(1, sizeof(Code));
+    return code;
 }
 
-Code* code_load_bytecode_cb(void(*read_bytes)(size_t, void*), void* data)
+void code_destroy(Code* code)
 {
+    free(code);
+}
+
+size_t code_n_consts(Code const* code)
+{
+    return 0;  // TODO
+}
+
+TYC_CONST_TYPE code_const_type(Code const* code, size_t n)
+{
+    return TC_REAL;  // TODO
+}
+
+T_REAL code_const_real(Code const* code, size_t n)
+{
+    return 0.f;  // TODO
+}
+
+const char* code_const_string(Code const* code, size_t n)
+{
+    return "";  // TODO
+}
+
+size_t code_n_functions(Code const* code)
+{
+    return 0;  // TODO
 }

lib/compiler.c

@@ -5,12 +5,14 @@
 
 #include "lua.h"
 #include "lauxlib.h"
+#include "lualib.h"
 
 #include "compiler/compiler.lua.h"
 
 TYC_RESULT code_assemble(const char* code, uint8_t** bytecode, size_t* bytecode_sz)
 {
     lua_State* L = luaL_newstate();
+    luaL_openlibs(L);
 
     int r = luaL_loadbufferx(L, (const char *) lib_compiler_compiler_out, lib_compiler_compiler_out_len, "compiler", "b");
     if (r == LUA_ERRSYNTAX)
@@ -18,6 +20,8 @@ TYC_RESULT code_assemble(const char* code, uint8_t** bytecode, size_t* bytecode_
     else if (r == LUA_ERRMEM)
         out_of_memory();
 
+    lua_call(L, 0, 1);
+
     lua_pushstring(L, code);
     r = lua_pcall(L, 1, 1, 0);
     if (r == LUA_ERRMEM) {
@@ -29,7 +33,15 @@ TYC_RESULT code_assemble(const char* code, uint8_t** bytecode, size_t* bytecode_
         return T_ERR_ASSEMBLER_SYNTAX_ERROR;
     }
 
-
+    if (!lua_istable(L, -1))
+        abort();
+    *bytecode_sz = luaL_len(L, -1);
+    *bytecode = malloc(*bytecode_sz);
+    for (size_t i = 0; i < *bytecode_sz; ++i) {
+        lua_geti(L, -1, i + 1);
+        (*bytecode)[i] = (uint8_t) lua_tointeger(L, -1);
+        lua_pop(L, 1);
+    }
 
     lua_close(L);
     return T_OK;

lib/compiler/compiler.lua

@@ -81,5 +81,6 @@ end
 ----------------------
 
 return function(source)
+    print('test')
     return { 0, 1, 2, 3, 4 }
 end

lib/priv.h

@@ -29,6 +29,10 @@ typedef struct Code  Code;
 typedef uint32_t HEAP_KEY;
 typedef uint64_t TABLE_HASH;
 
+typedef enum {
+    TC_STRING, TC_REAL,
+} TYC_CONST_TYPE;
+
 //
 // UTILS
 //
@@ -122,9 +126,15 @@ void     heap_gc(Heap* h, VALUE const* roots, size_t n_roots);
 
 TYC_RESULT code_assemble(const char* code, uint8_t** bytecode, size_t* bytecode_sz);
 
-Code* code_load_bytecode(uint8_t* bytecode, size_t bytecode_sz);
+Code* code_new(uint8_t* bytecode, size_t bytecode_sz);
-Code* code_load_bytecode_cb(void(*read_bytes)(size_t, void*), void* data);
-
 void  code_destroy(Code* code);
 
+size_t         code_n_consts(Code const* code);
+TYC_CONST_TYPE code_const_type(Code const* code, size_t n);
+
+T_REAL         code_const_real(Code const* code, size_t n);
+const char*    code_const_string(Code const* code, size_t n);
+
+size_t         code_n_functions(Code const* code);
+
 #endif //TYCHE_PRIV_H

lib/tyche.h

@@ -13,4 +13,6 @@ typedef enum {
     T_ERR_ASSEMBLER_SYNTAX_ERROR = -30,
 } TYC_RESULT;
 
+#define T_REAL float
+
 #endif //TYCHE_TYCHE_H

test/code-tests.lua

@@ -0,0 +1,14 @@
+return {
+    {
+        name = "VM: basic",
+        code = [[
+            .func 0
+                pushi   2
+                pushi   3
+                sum
+                ret
+        ]],
+        expected_stack_size = 1,
+        expected_stack_top = { integer = 5 },
+    },
+}

test/tests.c

@@ -213,4 +213,35 @@ int main()
         heap_destroy(h);
         stack_destroy(s);
     }
+
+    {
+        printf("### Bytecode\n");
+        const char* assembly_code =
+                ".const\n"
+                "    0: 3.14\n"
+                "    1: \"Hello world\"\n"
+                "\n"
+                ".func 0\n"
+                "    pushi   2   ; this is a comment\n"
+                "    pushi   3\n"
+                "    sum\n"
+                "    ret\n"
+                ".func 1\n"
+                "    pushi   5000\n"
+                "    ret";
+
+        uint8_t* bytecode; size_t bytecode_sz;
+        assert(code_assemble(assembly_code, &bytecode, &bytecode_sz) == T_OK);
+
+        Code* code = code_new(bytecode, bytecode_sz);
+
+        assert(code_n_consts(code) == 2);
+        assert(code_const_type(code, 0) == TC_REAL);
+        assert(code_const_type(code, 1) == TC_STRING);
+        assert(code_const_real(code, 0) >= 3.13 && code_const_real(code, 0) <= 3.15);
+        assert(strcmp(code_const_string(code, 1), "Hello world\n") == 0);
+        assert(code_n_functions(code) == 2);
+
+        free(bytecode);
+    }
 }