✨ import modules.

CMakeLists.txt

@@ -2,11 +2,13 @@ cmake_minimum_required(VERSION 3.29)
 
 project(moka)
 
+set(MOKA_LIB_DIR ${CMAKE_INSTALL_PREFIX}/lib/moka)
 set(CMAKE_EXPORT_COMPILE_COMMANDS On)
 
 add_subdirectory(lib)
 add_subdirectory(src)
 add_subdirectory(tests)
+add_subdirectory(std)
 
 set_property(TARGET moka-core PROPERTY C_STANDARD 99)
 set_property(TARGET moka-tests PROPERTY C_STANDARD 99)

lib/CMakeLists.txt

@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.29)
 
 project(moka-lib)
 
+configure_file(conf.in.h ${CMAKE_SOURCE_DIR}/lib/conf.h)
+
 add_library(moka-core
     commons.c
     status.c
@@ -18,10 +20,13 @@ add_library(moka-core
     moka.c
     symtable.c
     native.c
+    module.c
+    path.c
+    builtins.c
 )
 
 target_compile_options(moka-core
-    PUBLIC -Wall -Wextra -g
+    PUBLIC -Wall -Wextra -g -fPIC
 )
 
 target_include_directories(moka-core

lib/builtins.c

@@ -0,0 +1,48 @@
+#include "builtins.h"
+#include "node.h"
+#include "path.h"
+#include "module.h"
+
+void register_builtins(struct moka* moka)
+{
+    assert(moka);
+    moka_decl_native(moka, "println", mk_println);
+    moka_decl_native(moka, "define", mk_define);
+}
+
+MOKA mk_println(struct moka* moka, struct vec* args)
+{
+    assert(moka);
+    assert(args);
+
+    int line = 0;
+
+    for (size_t i=0; i<args->size; i++)
+    {
+        MOKA val = (MOKA) args->data[i];
+        if (i > 0) { printf(" "); }
+        else { line = moka_get_lazy(moka, val)->line; }
+        moka_dump(moka, MK_EVAL(val));
+    }
+
+    printf("\n");
+
+    return moka_push_int(moka, 0, line);
+}
+
+MOKA mk_define(struct moka* moka, struct vec* args)
+{
+    assert(moka); assert(args);
+    assert(args->size == 2);
+
+    MOKA target = (MOKA) args->data[0];
+    MOKA value = MK_EVAL((MOKA) args->data[1]);
+
+    struct node* node = moka_get_lazy(moka, target);
+
+    moka_push(moka, value);
+    assert(node->token);
+    moka_decl_var(moka, node->token->value, value);
+
+    return value;
+}

lib/builtins.h

@@ -0,0 +1,14 @@
+#ifndef MK_BUILTINS_H
+#define MK_BUILTINS_H
+
+#include "commons.h"
+#include "moka.h"
+
+#define MK_EVAL(X) moka_eval_lazy(moka, X)
+
+void register_builtins(struct moka* moka);
+
+MOKA mk_println(struct moka* moka, struct vec* args);
+MOKA mk_define(struct moka* moka, struct vec* args);
+
+#endif

lib/compiler.c

@@ -1,4 +1,8 @@
 #include "compiler.h"
+#include "moka.h"
+#include "module.h"
+#include "path.h"
+#include "conf.h"
 
 void compiler_init(struct compiler* self,
                    struct status* status)
@@ -15,7 +19,7 @@ void compiler_free(struct compiler* self)
 void compiler_compile(struct compiler* self,
                       struct node* node,
                       struct prog* prog,
-                      struct symtable* symtable)
+                      struct moka* moka)
 {
     assert(self); assert(node); assert(prog);
 
@@ -25,26 +29,30 @@ void compiler_compile(struct compiler* self,
             for (size_t i=0; i<node->children.size; i++)
             {
                 struct node* child = node->children.data[i];
-                compiler_compile(self, child, prog, symtable);
+                compiler_compile(self, child, prog, moka);
             }
         } break;
 
         case NODE_CALL: {
+            struct node* child = node->children.data[0];
+
+            if (strcmp(child->token->value, "import") == 0)
+            {
+                compiler_import(self, moka, node);
+                break;
+            }
+
             for (size_t i=0; i<node->children.size - 1; i++)
             {
-                // size_t k = node->children.size - 1 - i;
-                // struct node* child = node->children.data[k];
-                // compiler_compile(self, child, prog, symtable);
                 size_t k = node->children.size - 1 - i;
-                struct node* child = node->children.data[k];
+                struct node* mychild = node->children.data[k];
                 struct value* val = malloc(sizeof(struct value));
-                value_init_lazy(val, child, child->line);
+                value_init_lazy(val, mychild, mychild->line);
                 size_t addr = prog_add_new_value(prog, val);
                 prog_add_instruction(prog, OP_PUSH, addr);
             }
 
-            struct node* child = node->children.data[0];
-            compiler_compile(self, child, prog, symtable);
+            compiler_compile(self, child, prog, moka);
 
             prog_add_instruction(prog, OP_CALL, node->children.size - 1);
         } break;
@@ -88,8 +96,10 @@ void compiler_compile(struct compiler* self,
         } break;
 
         case NODE_IDENT: {
-            struct entry const* entry = symtable_try_get(symtable,
-                                                   node->token->value);
+            struct entry const* entry = symtable_try_get(
+                &moka->symtable,
+                node->token->value
+            );
             if (!entry)
             {
                 status_push(self->status, STATUS_ERROR, node->line,
@@ -114,3 +124,102 @@ void compiler_compile(struct compiler* self,
         } break;
     }
 }
+
+
+void compiler_import(struct compiler* self,
+                     struct moka* moka,
+                     struct node* node)
+{
+    (void) self;
+
+    struct node* arg = node->children.data[1];
+    char const* name = arg->token->value;
+
+    if (!path_is_local(name))
+    {
+        char source_name_loc[MK_STRLEN];
+        path_apply_ext(name, "mk", source_name_loc, MK_STRLEN);
+        char source_name[MK_STRLEN*2];
+        snprintf(source_name, MK_STRLEN * 2, "%s/%s",
+                 MOKA_LIB_DIR,
+                 source_name_loc);
+
+        char lib_name_tmp[MK_STRLEN];
+        path_apply_ext(name, "so", lib_name_tmp, MK_STRLEN);
+        char lib_name_loc[MK_STRLEN];
+        path_apply_prefix(lib_name_tmp, "lib", lib_name_loc, MK_STRLEN);
+        char lib_name[MK_STRLEN * 2];
+        snprintf(lib_name, MK_STRLEN * 2, "%s/%s",
+                 MOKA_LIB_DIR,
+                 lib_name_loc);
+
+        if (path_exists(source_name))
+        {
+            struct module* module = malloc(sizeof(struct module));
+            module_init(module);
+            module_load_from_file(module, source_name);
+
+            char modname[MK_STRLEN];
+            path_get_mod_name(name, modname, MK_STRLEN);
+
+            moka_import_module(moka, modname, module);
+            return;
+        }
+        else if (path_exists(lib_name))
+        {
+            struct module* module = malloc(sizeof(struct module));
+            module_init(module);
+            module_load_from_dl(module, lib_name);
+
+            char modname[MK_STRLEN];
+            path_get_mod_name(name, modname, MK_STRLEN);
+
+            moka_import_module(moka, modname, module);
+            return;
+        }
+    }
+    else
+    {
+        char source_name[MK_STRLEN];
+        path_apply_ext(name, "mk", source_name, MK_STRLEN);
+
+
+        char lib_name_tmp[MK_STRLEN];
+        path_apply_ext(name, "so", lib_name_tmp, MK_STRLEN);
+        char lib_name[MK_STRLEN];
+        path_apply_prefix(lib_name_tmp, "lib", lib_name, MK_STRLEN);
+
+        if (path_exists(source_name))
+        {
+            struct module* module = malloc(sizeof(struct module));
+            module_init(module);
+            module_load_from_file(module, source_name);
+
+            char modname[MK_STRLEN];
+            path_get_mod_name(name, modname, MK_STRLEN);
+
+            moka_import_module(moka, modname, module);
+            return;
+        }
+        else if (path_exists(lib_name))
+        {
+            struct module* module = malloc(sizeof(struct module));
+            module_init(module);
+            module_load_from_dl(module, lib_name);
+
+            char modname[MK_STRLEN];
+            path_get_mod_name(name, modname, MK_STRLEN);
+
+            moka_import_module(moka, modname, module);
+            return;
+        }
+    }
+
+    status_push(
+        self->status,
+        STATUS_ERROR,
+        node->line,
+        "unknown module <%s>",
+        name
+    );
+}

lib/compiler.h

@@ -19,5 +19,10 @@ void compiler_free(struct compiler* self);
 void compiler_compile(struct compiler* self, 
                       struct node* node,
                       struct prog* prog,
-                      struct symtable* symtable);
+                      struct moka* moka);
+
+void compiler_import(struct compiler* self, 
+                     struct moka* moka, 
+                     struct node* node);
+
 #endif

lib/conf.h

@@ -0,0 +1,7 @@
+#ifndef MK_CONF_H
+#define MK_CONF_H
+
+#define MOKA_LIB_DIR "/usr/local/lib/moka"
+ 
+
+#endif

lib/conf.in.h

@@ -0,0 +1,7 @@
+#ifndef MK_CONF_H
+#define MK_CONF_H
+
+#cmakedefine MOKA_LIB_DIR "@MOKA_LIB_DIR@"
+ 
+
+#endif

lib/exec.c

@@ -38,25 +38,7 @@ void exec_instr(struct exec* self,
     switch (instr->opcode)
     {
         case OP_CALL: {
-            MOKA fun = moka_pop(moka);
-            struct vec args;
-            vec_init(&args);
-
-            for (ssize_t i=0; i<param; i++)
-            {
-                MOKA arg = moka_pop(moka);
-                vec_push(&args, (void*) arg);
-            }
-
-            struct value* val = moka->global_values.data[
-                moka_get_ref(moka, fun)
-            ];
-
-            assert(val->type == TY_NATIVE);
-            struct native* native = val->data.native;
-            (native->fun)(moka, &args);
-
-            vec_free(&args);
+            moka_call(moka, param);
             self->pc++;
         } break;
 
@@ -65,6 +47,11 @@ void exec_instr(struct exec* self,
             self->pc++;
         } break;
 
+        case OP_LOCAL_LOAD: {
+            moka_push(moka, param);
+            self->pc++;
+        } break;
+
         case OP_PUSH: {
             struct value* value = prog->values.data[param];
             switch (value->type)

lib/lexer.c

@@ -33,6 +33,11 @@ struct token* lexer_try_new_next(struct lexer* self)
     assert(self);
     struct token* tok = NULL;
 
+    if (!status_is_ok(self->status) > 0)
+    {
+        return NULL;
+    }
+
     lexer_skip_spaces(self);
 
     if ( (tok=lexer_try_new_text(self, TOKEN_OPAR, "(")) )
@@ -348,12 +353,17 @@ struct token* lexer_try_new_ident(struct lexer* self)
         cursor++;
     }
 
-    struct token* tok = malloc(sizeof(struct token));
-    token_init(tok, TOKEN_IDENT, value.value);
-    str_free(&value);
+    if (value.size > 0)
+    {
+        struct token* tok = malloc(sizeof(struct token));
+        token_init(tok, TOKEN_IDENT, value.value);
+        str_free(&value);
 
-    self->context.cursor = cursor;
-    return tok;
+        self->context.cursor = cursor;
+        return tok;
+    }
+
+    return NULL;
 }
 
 bool lexer_is_sep(struct lexer* self, size_t index)
@@ -391,7 +401,8 @@ bool lexer_is_ident(struct lexer* self, size_t index)
     || c == '_'
     || c == '!'
     || c == '?'
-    || c == '-';
+    || c == '-'
+    || c == ':';
 }
 
 struct token* lexer_try_new_text(struct lexer* self,

lib/module.c

@@ -0,0 +1,125 @@
+#include <dlfcn.h>
+#include "module.h"
+#include "builtins.h"
+
+void module_init(struct module* self)
+{
+    assert(self);
+    status_init(&self->status);
+    moka_init(&self->moka, &self->status);
+    register_builtins(&self->moka);
+
+    prog_init(&self->prog);
+    self->handle = NULL;
+}
+
+void module_free(struct module* self)
+{
+    assert(self);
+    status_free(&self->status);
+    prog_free(&self->prog);
+    moka_free(&self->moka);
+    if (self->handle)
+    {
+        dlclose(self->handle);
+        self->handle = NULL;
+    }
+}
+
+int module_load_from_dl(struct module* self, char const* path)
+{
+    assert(self);
+    assert(path);
+
+    self->handle = dlopen(path, RTLD_NOW);
+
+    if (!self->handle)
+    {
+        return EXIT_FAILURE;
+    }
+
+    void (*f)(struct module*) = dlsym(self->handle, "create_module");
+
+    if (!f)
+    {
+        dlclose(self->handle);
+        return EXIT_FAILURE;
+    }
+
+    f(self);
+
+    return EXIT_SUCCESS;
+}
+
+int module_load_from_file(struct module* self, char const* path)
+{
+    assert(self);
+    assert(path);
+
+    struct str source;
+    str_init(&source);
+
+    FILE* file = fopen(path, "r+");
+    size_t sz;
+    char buf;
+
+    while ( (sz=fread(&buf, sizeof(char), 1, file)) )
+    {
+        str_push(&source, buf);
+    }
+
+    fclose(file);
+
+    int ret = module_load_from_str(self, source.value);
+
+    str_free(&source);
+
+    return ret;
+}
+
+int module_load_from_str(struct module* self, char const* source)
+{
+    status_init(&self->status);
+
+    struct lexer lex;
+    lexer_init(&lex, source, &self->status);
+
+    struct parser parser;
+    parser_init(&parser, &lex);
+    struct node* root = parser_try_new_root(&parser);
+
+    if (!root || !status_is_ok(&self->status))
+    {
+        status_dump(&self->status);
+        goto free_parser;
+    }
+
+    struct compiler compiler;
+    compiler_init(&compiler, &self->status);
+
+    compiler_compile(&compiler, root, &self->prog, &self->moka);
+
+    if (!status_is_ok(&self->status))
+    {
+        status_dump(&self->status);
+        goto free_compiler;
+    }
+
+    struct exec exec;
+    exec_init(&exec);
+
+    exec_prog(&exec, &self->moka, &self->prog);
+    exec_free(&exec);
+
+free_compiler:
+    compiler_free(&compiler);
+    node_free(root);
+    free(root);
+free_parser:
+    parser_free(&parser);
+    lexer_free(&lex);
+
+    int ret = status_is_ok(&self->status) ? EXIT_SUCCESS : EXIT_FAILURE;
+
+    return ret;
+}

lib/module.h

@@ -0,0 +1,29 @@
+#ifndef MK_MODULE_H
+#define MK_MODULE_H
+
+#include "commons.h"
+#include "status.h"
+#include "lexer.h"
+#include "parser.h"
+#include "prog.h"
+#include "moka.h"
+#include "compiler.h"
+#include "exec.h"
+#include "status.h"
+
+struct module
+{
+    struct status status;
+    struct prog prog;
+    struct moka moka;
+    void* handle;
+};
+
+void module_init(struct module* self);
+void module_free(struct module* self);
+
+int module_load_from_dl(struct module* self, char const* path);
+int module_load_from_file(struct module* self, char const* path);
+int module_load_from_str(struct module* self, char const* source);
+
+#endif

lib/moka.c

@@ -3,6 +3,23 @@
 #include "compiler.h"
 #include "prog.h"
 #include "exec.h"
+#include "module.h"
+
+void moka_mod_init(struct moka_mod* self,
+                   char const* name,
+                   struct module* new_module)
+{
+    assert(self);
+    self->name = strdup(name);
+    self->module = new_module;
+}
+
+void moka_mod_free(struct moka_mod* self)
+{
+    free(self->name);
+    module_free(self->module);
+    free(self->module);
+}
 
 void moka_init(struct moka* self, struct status* status)
 {
@@ -11,6 +28,7 @@ void moka_init(struct moka* self, struct status* status)
     symtable_init(&self->symtable);
     vec_init(&self->frame_stack);
     vec_init(&self->global_values);
+    vec_init(&self->modules);
 
     struct frame* frame = malloc(sizeof(struct frame));
     frame_init(frame);
@@ -37,10 +55,130 @@ void moka_free(struct moka* self)
     symtable_free(&self->symtable);
     vec_free_elements(&self->frame_stack, (void*) frame_free);
     vec_free(&self->frame_stack);
+
+    vec_free_elements(&self->modules, (void*) moka_mod_free);
+    vec_free(&self->modules);
+
     vec_free_elements(&self->global_values, (void*) value_free);
     vec_free(&self->global_values);
 }
 
+void moka_import_module(struct moka* self,
+                        char const* name,
+                        struct module* module)
+{
+    assert(self);
+    assert(name);
+    assert(module);
+    
+    struct symtable* mod_sym = &module->moka.symtable;
+    struct env* env = mod_sym->root;
+
+    struct frame* mod_frame = moka_frame(&module->moka);
+    struct vec* mod_locals = &mod_frame->local_values;
+    struct vec* mod_globals = &module->moka.global_values;
+
+    for (size_t i=0; i<env->entries.size; i++)
+    {
+        struct entry const* entry = env->entries.data[i];
+        struct value* val;
+        if (entry->is_local)
+        {
+            val = mod_locals->data[entry->addr];
+        }
+        else
+        {
+            val = mod_globals->data[entry->addr];
+        }
+
+        char new_name[MK_STRLEN];
+        snprintf(new_name, MK_STRLEN, "%s::%s", name, entry->name);
+
+        switch (val->type)
+        {
+            case TY_NATIVE: {
+                moka_decl_native(
+                    self, 
+                    new_name, 
+                    val->data.native->fun
+                );
+            } break;
+
+            case TY_SYMBOL: {
+                moka_decl_var(
+                    self, 
+                    new_name,
+                    moka_push_symbol(self, 
+                                     val->data.sym,
+                                     val->line));
+            } break;
+
+            case TY_STRING: {
+                moka_decl_var(
+                    self, 
+                    new_name,
+                    moka_push_string(self, 
+                                     val->data.str,
+                                     val->line));
+            } break;
+
+            case TY_INT: {
+                moka_decl_var(
+                    self, 
+                    new_name,
+                    moka_push_int(self, 
+                                  val->data.integer,
+                                  val->line));
+            } break;
+
+            default: {
+                fprintf(stderr, 
+                        "cannot import value of type <%s>\n",
+                        TypeKindStr[val->type]);
+                abort();
+            } break;
+        }
+
+    }
+
+    struct moka_mod* mod = malloc(sizeof(struct moka_mod));
+    moka_mod_init(mod, (char*) name, module);
+
+    vec_push(&self->modules, mod);
+}
+
+struct module* moka_try_get_module(struct moka* self,
+                                   char const* name)
+{
+    assert(self);
+    assert(name);
+
+    for (size_t i=0; i<self->modules.size; i++)
+    {
+        struct moka_mod* mod = self->modules.data[i];
+
+        if (strcmp(name, mod->name))
+        {
+            return mod->module;
+        }
+    }
+
+    return NULL;
+}
+
+void moka_decl_var(struct moka* self,
+                   char* name,
+                   MOKA value)
+{
+    assert(self); assert(name);
+
+    symtable_declare(
+        &self->symtable,
+        name,
+        value,
+        true);
+}
+
 void moka_decl_native(struct moka* self,
                       char* name,
                       native_fun_t fun)
@@ -149,6 +287,38 @@ void moka_dump(struct moka* self, MOKA value)
     abort();
 }
 
+MOKA moka_call(struct moka* self, int arg_count)
+{
+    MOKA fun = moka_pop(self);
+    struct vec args;
+    vec_init(&args);
+
+    for (ssize_t i=0; i<arg_count; i++)
+    {
+        MOKA arg = moka_pop(self);
+        vec_push(&args, (void*) arg);
+    }
+
+    struct value* val = self->global_values.data[
+        moka_get_ref(self, fun)
+    ];
+
+    assert(val->type == TY_NATIVE);
+    struct native* native = val->data.native;
+    (native->fun)(self, &args);
+
+    vec_free(&args);
+    return moka_top(self);
+}
+
+MOKA moka_push(struct moka* self, MOKA value)
+{
+    assert(self);
+    struct frame* frame = moka_frame(self);
+    vec_push(&frame->stack, (void*) value);
+    return value;
+}
+
 MOKA moka_push_int(struct moka* self, int value, int line)
 {
     assert(self);
@@ -271,6 +441,7 @@ size_t moka_get_ref(struct moka* self, MOKA value)
     assert(self);
     struct frame* frame = moka_frame(self);
     struct value* val = frame->local_values.data[value];
+
     assert(val->type == TY_REF);
     return val->data.ref;
 }
@@ -305,6 +476,12 @@ native_fun_t moka_get_native(struct moka* self, MOKA value)
 MOKA moka_eval_lazy(struct moka* self, MOKA lazy_value)
 {
     assert(self);
+
+    if (!moka_is(self, lazy_value, TY_LAZY))
+    {
+        return lazy_value;
+    }
+
     struct node* node = moka_get_lazy(self, lazy_value);
 
     struct compiler compiler;
@@ -317,7 +494,7 @@ MOKA moka_eval_lazy(struct moka* self, MOKA lazy_value)
         &compiler,
         node,
         &prog,
-        &self->symtable);
+        self);
 
     if (!status_is_ok(self->status))
     {

lib/moka.h

@@ -12,19 +12,43 @@ struct frame
     struct vec local_values;
 };
 
+struct moka_mod
+{
+    char* name;
+    struct module* module;
+};
+
 struct moka
 {
     struct status* status;
     struct symtable symtable;
     struct vec frame_stack;
     struct vec global_values;
+    struct vec modules;
 };
 
+void moka_mod_init(struct moka_mod* self,
+                   char const* name,
+                   struct module* new_module);
+void moka_mod_free(struct moka_mod* self);
+
 void moka_init(struct moka* self, struct status* status);
 void frame_init(struct frame* self);
 void frame_free(struct frame* self);
 void moka_free(struct moka* self);
 
+
+void moka_import_module(struct moka* self,
+                        char const* name,
+                        struct module* module);
+
+struct module* moka_try_get_module(struct moka* self,
+                                   char const* name);
+
+void moka_decl_var(struct moka* self,
+                   char* name,
+                   MOKA value);
+
 void moka_decl_native(struct moka* self,
                       char* name,
                       native_fun_t fun);
@@ -39,6 +63,10 @@ TypeKind moka_type_of(struct moka* self, MOKA value);
 
 void moka_dump(struct moka* self, MOKA value);
 
+MOKA moka_call(struct moka* self, int arg_count);
+
+MOKA moka_push(struct moka* self, MOKA value);
+
 MOKA moka_push_int(struct moka* self, int value, int line);
 int moka_get_int(struct moka* self, MOKA value);
 

lib/path.c

@@ -0,0 +1,162 @@
+#include "path.h"
+
+bool path_is_local(char const* path)
+{
+    assert(path);
+
+    if (strlen(path) == 0)
+    {
+        return false;
+    }
+
+    return path[0] == '.';
+}
+
+void path_get_mod_name(char const* path, char* buffer, size_t size)
+{
+    assert(path);
+    size_t sz = strlen(path);
+    size_t k = 0;
+
+    for (size_t i=0; i<sz; i++)
+    {
+        if (path[i] == '.' && i != 0)
+        {
+            bool at_end = true;
+            for (size_t j=i+1; j<sz; j++)
+            {
+                if (path[j] == '/' && j != sz - 1)
+                {
+                    at_end = false;
+                    break;
+                }
+            }
+
+            if (at_end)
+            {
+                break;
+            }
+        }
+
+        if (path[i] == '/' && i != sz - 1)
+        {
+            k = 0;
+        }
+        else if (path[i] != '/')
+        {
+            if (k >= size) { break; }
+            buffer[k] = path[i];
+            k++;
+        }
+    }
+
+    buffer[k] = '\0';
+}
+
+bool path_exists(char const* path)
+{
+    FILE* file;
+
+    if ( (file = fopen(path, "r")) )
+    {
+        fclose(file);
+        return true;
+    }
+
+    return false;
+}
+
+size_t path_apply_ext(char const* path, 
+                    char const* ext,
+                    char* buffer, 
+                    size_t size)
+{
+    assert(path); assert(ext); assert(buffer);
+    
+    ssize_t ext_idx = -1;
+    size_t path_sz = strlen(path);
+
+    char result[MK_STRLEN];
+    memset(result, '\0', sizeof(char) * MK_STRLEN);
+    memcpy(result, path, sizeof(char) * path_sz);
+
+    for (size_t i=0; i<path_sz; i++)
+    {
+        size_t k = path_sz - i - 1;
+
+        if (path[k] == '.')
+        {
+            ext_idx = k;
+            break;
+        }
+    }
+
+    if (ext_idx == -1 || (path[0] == '.' && ext_idx == 0))
+    {
+        return snprintf(buffer, size, "%s.%s", path, ext);
+    }
+
+    size_t sz = 0;
+    for (ssize_t i=0; i<=ext_idx; i++)
+    {
+        sz += snprintf(buffer + sz, size - sz, "%c", path[i]);
+    }
+
+    size_t const ext_sz = strlen(ext);
+
+    for (size_t i=0; i<ext_sz; i++)
+    {
+        sz += snprintf(buffer + sz, size - sz, "%c", ext[i]);
+    }
+
+    return sz;
+}
+
+size_t path_apply_prefix(char const* path, 
+                         char const* prefix,
+                         char* buffer, 
+                         size_t size)
+{
+    assert(path); assert(prefix); assert(buffer);
+    
+    size_t const path_sz = strlen(path);
+    char const* itr = strstr(path, prefix);
+    size_t prefix_pos = 0;
+
+    for (size_t i=0; i<path_sz; i++)
+    {
+        size_t k = path_sz - 1 - i;
+
+        if (path[k] == '/')
+        {
+            prefix_pos = k + 1;
+            break;
+        }
+    }
+    
+    if (path + prefix_pos == itr)
+    {
+        memcpy(buffer, path, sizeof(char) * path_sz);
+        return 0;
+    }
+
+    size_t sz = 0;
+    for (size_t i=0; i<prefix_pos; i++)
+    {
+        sz += snprintf(buffer + sz, size - sz, "%c", path[i]);
+    }
+
+    size_t const prefix_sz = strlen(prefix);
+
+    for (size_t i=0; i<prefix_sz; i++)
+    {
+        sz += snprintf(buffer + sz, size - sz, "%c", prefix[i]);
+    }
+
+    for (size_t i=prefix_pos; i<path_sz; i++)
+    {
+        sz += snprintf(buffer + sz, size - sz, "%c", path[i]);
+    }
+
+    return sz;
+}

lib/path.h

@@ -0,0 +1,19 @@
+#ifndef MK_PATH_H
+#define MK_PATH_H
+
+#include "commons.h"
+
+bool path_is_local(char const* path);
+void path_get_mod_name(char const* path, char* buffer, size_t size);
+bool path_exists(char const* path);
+size_t path_apply_ext(char const* path, 
+                      char const* ext,
+                      char* buffer, 
+                      size_t size);
+
+size_t path_apply_prefix(char const* path, 
+                         char const* prefix,
+                         char* buffer, 
+                         size_t size);
+#endif
+

lib/prog.c

@@ -35,6 +35,7 @@ size_t prog_add_instruction(struct prog* self,
     {
         case OP_CALL:
         case OP_GLOBAL_LOAD:
+        case OP_LOCAL_LOAD:
         case OP_PUSH: {
             self->stack_addr++;
         } break;

lib/value.h

@@ -38,6 +38,7 @@ void value_init_symbol(struct value* self, char const* value, int line);
 void value_init_ref(struct value* self, size_t value, int line);
 void value_init_native(struct value* self, struct native* value, int line);
 void value_init_lazy(struct value* self, struct node* value, int line);
+
 void value_free(struct value* self);
 
 #endif

src/main.c

@@ -5,85 +5,18 @@
 #include <compiler.h>
 #include <exec.h>
 #include <moka.h>
+#include <module.h>
 
 int main(int argc, char** argv)
 {
     if (argc <= 1) { return EXIT_FAILURE; }
     
-    struct status status;
-    status_init(&status);
+    struct module module;
+    module_init(&module);
 
-    struct str source;
-    str_init(&source);
+    int ret = module_load_from_file(&module, argv[1]);
 
-    {
-        FILE* file = fopen(argv[1], "r+");
-        size_t sz;
-        char buf;
-        while ( (sz=fread(&buf, sizeof(char), 1, file)) )
-        {
-            str_push(&source, buf);
-        }
-        fclose(file);
-    }
-
-    struct lexer lex;
-    lexer_init(&lex, source.value, &status);
-
-    struct parser parser;
-    parser_init(&parser, &lex);
-    struct node* root = parser_try_new_root(&parser);
-
-    if (!root || !status_is_ok(&status))
-    {
-        status_dump(&status);
-        goto free_parser;
-    }
-
-    struct compiler compiler;
-    compiler_init(&compiler, &status);
-
-    struct prog prog;
-    prog_init(&prog);
-
-
-    struct moka moka;
-    moka_init(&moka, &status);
-    compiler_compile(&compiler, root, &prog, &moka.symtable);
-
-    if (!status_is_ok(&status))
-    {
-        status_dump(&status);
-        goto free_moka;
-    }
-
-
-    struct exec exec;
-    exec_init(&exec);
-
-    exec_prog(&exec, &moka, &prog);
-
-    if (moka_has_top(&moka))
-    {
-        MOKA value = moka_top(&moka);
-        moka_dump(&moka, value);
-        printf("\n");
-    }
-
-    exec_free(&exec);
-free_moka:
-    moka_free(&moka);
-    prog_free(&prog);
-    compiler_free(&compiler);
-    node_free(root);
-    free(root);
-free_parser:
-    parser_free(&parser);
-    lexer_free(&lex);
-    str_free(&source);
-
-    int ret = status_is_ok(&status) ? EXIT_SUCCESS : EXIT_FAILURE;
-    status_free(&status);
+    module_free(&module);
 
     return ret;
 }

std/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.29)
+
+project(moka-std)
+
+function(add_stdlib target source)
+    add_library(${target} SHARED 
+    ${source}
+    )
+
+    add_dependencies(${target} moka-core)
+
+    target_link_libraries(${target}
+    PUBLIC moka-core
+    )
+
+    install(TARGETS ${target} LIBRARY DESTINATION lib/moka)
+endfunction()
+

tests/main.c

@@ -2,6 +2,7 @@
 #include <check.h>
 #include "lexer.h"
 #include "parser.h"
+#include "path.h"
 
 int main()
 {
@@ -9,6 +10,7 @@ int main()
 
     register_lexer(s);
     register_parser(s);
+    register_path(s);
 
     SRunner* runner = srunner_create(s);
     srunner_run_all(runner, CK_VERBOSE);

tests/path.h

@@ -0,0 +1,82 @@
+#ifndef MK_TEST_PATH_H
+#define MK_TEST_PATH_H
+
+#include <check.h>
+#include <path.h>
+
+START_TEST(path_check_local)
+{
+    ck_assert(true == path_is_local("./hello/world"));
+    ck_assert(true == path_is_local("../hello/world"));
+    ck_assert(false == path_is_local(""));
+    ck_assert(false == path_is_local("hello/world"));
+    ck_assert(false == path_is_local("/hello/world"));
+    ck_assert(false == path_is_local("/../hello/world"));
+}
+END_TEST
+
+START_TEST(test_path_get_mod_name)
+{
+    size_t const SZ = MK_STRLEN;
+    char buffer[SZ];
+
+    path_get_mod_name("./hello/world", buffer, SZ);
+    ck_assert_str_eq("world", buffer);
+
+    path_get_mod_name("./hello/world/", buffer, SZ);
+    ck_assert_str_eq("world", buffer);
+
+    path_get_mod_name("./hello.ext", buffer, SZ);
+    ck_assert_str_eq("hello", buffer);
+
+    path_get_mod_name("./hello.ext/world.com", buffer, SZ);
+    ck_assert_str_eq("world", buffer);
+
+    path_get_mod_name("./hello.ext/world.com/", buffer, SZ);
+    ck_assert_str_eq("world", buffer);
+}
+END_TEST
+
+START_TEST(test_path_apply_ext)
+{
+    size_t const SZ = MK_STRLEN;
+    char buffer[SZ];
+
+    path_apply_ext("./hello/world", "abc", buffer, SZ);
+    ck_assert_str_eq("./hello/world.abc", buffer);
+
+    path_apply_ext("world.mk", "abc", buffer, SZ);
+    ck_assert_str_eq("world.abc", buffer);
+
+    path_apply_ext("./hello/world.xy", "xy", buffer, SZ);
+    ck_assert_str_eq("./hello/world.xy", buffer);
+}
+END_TEST
+
+START_TEST(test_path_apply_prefix)
+{
+    size_t const SZ = MK_STRLEN;
+    char buffer[SZ];
+
+    path_apply_prefix("./hello/world.so", "lib", buffer, SZ);
+    ck_assert_str_eq("./hello/libworld.so", buffer);
+
+    path_apply_prefix("./hello/libworld.so", "lib", buffer, SZ);
+    ck_assert_str_eq("./hello/libworld.so", buffer);
+
+    path_apply_prefix("./hello/alibworld.so", "lib", buffer, SZ);
+    ck_assert_str_eq("./hello/libalibworld.so", buffer);
+}
+END_TEST
+
+void register_path(Suite* suite)
+{
+    TCase* tcase = tcase_create("path");
+    suite_add_tcase(suite, tcase);
+    tcase_add_test(tcase, path_check_local);
+    tcase_add_test(tcase, test_path_get_mod_name);
+    tcase_add_test(tcase, test_path_apply_ext);
+    tcase_add_test(tcase, test_path_apply_prefix);
+}
+
+#endif