wip: begin dynamic library loading dev

src/stdlib/bindings/conv.fzs

@@ -0,0 +1,6 @@
+/// Converts integer [value] to string
+extern fn itos(int value) str;
+
+/// Converts string [value] to integer
+extern fn stoi(str value) int;
+

src/stdlib/bindings/math.fzs

@@ -0,0 +1,6 @@
+/// Get the minimum of specified values
+extern fn min([]int ...values) int;
+
+/// Get the maximum of specified values
+extern fn max([]int ...values) int;
+

src/vm/fzl_vm.c

@@ -28,14 +28,16 @@ fzl_vm_t *fzl_mkvm(const char *filepath)
     return NULL;
   }
 
-  vm->consts       = NULL;
-  vm->consts_count = 0;
-  vm->ops          = NULL;
-  vm->ops_count    = 0;
-  vm->ip           = 0;
-  vm->dtop         = 0;
-  vm->ctop         = 0;
-  vm->etop         = 0;
+  vm->consts        = NULL;
+  vm->consts_count  = 0;
+  vm->ops           = NULL;
+  vm->ops_count     = 0;
+  vm->externs       = NULL;
+  vm->externs_count = 0;
+  vm->ip            = 0;
+  vm->dtop          = 0;
+  vm->ctop          = 0;
+  vm->etop          = 0;
 
   memset(vm->dstack, 0, sizeof(vm->dstack));
   memset(vm->cstack, 0, sizeof(vm->cstack));
@@ -63,6 +65,7 @@ fzl_vm_t *fzl_mkvm(const char *filepath)
   size_t consts_count, ops_count;
   fread(&consts_count, sizeof(size_t), 1, fd);
   fread(&ops_count, sizeof(size_t), 1, fd);
+  // TODO: read externs count
 
   if (ops_count < 1)
   {
@@ -116,6 +119,8 @@ fzl_vm_t *fzl_mkvm(const char *filepath)
     fread(&op, sizeof(uint64_t), 1, fd);
     vm->ops[i] = op;
   }
+
+  // TODO: read externs
   fclose(fd);
 
   return vm;