Add more code

Add some funcitons to work with variables, add more instructions and add
ability to stop the code from `ccl_instruction`

1 files changed, 32 insertions, 0 deletions

diff --git a/src/variable.c b/src/variable.c
new file mode 100644
index 0000000..38ea2e3
--- /dev/null
+++ b/src/variable.c
@@ -0,0 +1,32 @@
+#include "3cl.h"
+#include "variable.h"
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+
+struct CCLVariable *ccl_variable_get(struct CCLVariable *vars, char name)
+{
+    for (struct CCLVariable *var = vars;;var = var->next)
+        if (var->name == name)
+            return var;
+        else if (var->name == '_' || var->next == NULL)
+            return NULL;
+}
+
+struct CCLVariable *ccl_variable_getany(struct CCL *ccl, struct CCLFrame *frame, char name)
+{
+    bool root = false;
+    struct CCLFrame *curframe;
+    struct CCLVariable *found;
+
+    for (curframe = frame; curframe->type != CCL_PROC && curframe->type != CCL_ROOT; curframe = curframe->prev);
+    if (curframe->type == CCL_ROOT)
+        root = true;
+
+    found = ccl_variable_get(&curframe->vars, name);
+    if (!found && !root)
+        return ccl_variable_get(&ccl->rootframe.vars, name);
+
+    return NULL;
+}