refactor eval

1 files changed, 56 insertions, 0 deletions

diff --git a/src/eval/eval_tree_cd.cc b/src/eval/eval_tree_cd.cc
new file mode 100644
index 0000000..7d7c1af
--- /dev/null
+++ b/src/eval/eval_tree_cd.cc
@@ -0,0 +1,56 @@
+#include "eval.h"
+
+#include <string>
+
+#include "error.h"
+#include "lang_analysis/lexer_class.h"
+#include "lang_analysis/ast.h"
+#include "lang_analysis/token.h"
+#include "lang_analysis/enum_type.h"
+#include "lang_analysis/symbol_property.h"
+#include "util/io.h"
+
+using namespace std;
+
+namespace ov4
+{
+
+int eval_tree_cd(size_t i, const T_lexer &lexer_instance, bool inside_subshell)
+{
+    // TODO: async
+
+    int ret = -1;
+
+    println("eval_tree_cd: processing {} subshell {}", i, (lexer_instance.ast[i].subshell ? "TRUE" : "FALSE"));
+
+    // if it's a subshell, and current AST's subshell status is not subshell
+    // (subshell should be forkerd already, then set inside_subshell = true)
+    // fork itself
+    if (lexer_instance.ast[i].subshell && !inside_subshell)
+    {
+        eval_exe("", false, &lexer_instance, i);
+        return 0;
+    }
+
+    if (lexer_instance.ast[i].token_type == TEXT)
+    {
+        ret = eval_exe(lexer_instance.ast[i].command_text, false);
+        return ret;
+    }
+
+    if (lexer_instance.ast[i].left != string::npos)
+    {
+        ret = eval_tree_cd(lexer_instance.ast[i].left, lexer_instance, false);
+    }
+
+    if (lexer_instance.ast[i].right != string::npos)
+    {
+        if (lexer_instance.ast[i].token_type == LOGIC_AND && ret != 0) return ret;
+        if (lexer_instance.ast[i].token_type == LOGIC_OR && ret == 0) return ret;
+        
+        ret = eval_tree_cd(lexer_instance.ast[i].right, lexer_instance, false);
+    }
+    return ret;
+}
+
+}
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