3 files changed, 143 insertions, 0 deletions
diff --git a/21sh/ll-expr/src/eval/ast_print.c b/21sh/ll-expr/src/eval/ast_print.c
new file mode 100644
index 0000000..9d7cbb8
--- /dev/null
+++ b/21sh/ll-expr/src/eval/ast_print.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+
+#include "lexer.h"
+#include "parser.h"
+
+char tab[] = { [AST_PLUS] = '+',
+               [AST_MINUS] = '-',
+               [AST_MUL] = '*',
+               [AST_DIV] = '/' };
+
+void print_ast(struct ast *ast)
+{
+    if (ast == NULL)
+        return;
+
+    if (ast->type == AST_NUMBER)
+        printf("%zu", ast->value);
+    else if (ast->type == AST_NEG)
+        printf("-%zu", (ast->left)->value);
+    else
+    {
+        printf("(");
+
+        print_ast(ast->left);
+
+        printf("%c", tab[ast->type]);
+
+        print_ast(ast->right);
+
+        printf(")");
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    if (argc != 2)
+        return 1;
+
+    struct lexer *lexer = lexer_new(argv[1]);
+
+    struct ast *ast;
+    enum parser_status status = PARSER_OK;
+    ast = parse(&status, lexer);
+    if (status != PARSER_OK)
+    {
+        lexer_free(lexer);
+        return 1;
+    }
+
+    print_ast(ast);
+    printf("\n");
+
+    ast_free(ast);
+    lexer_free(lexer);
+
+    return 0;
+}
diff --git a/21sh/ll-expr/src/eval/rpn_print.c b/21sh/ll-expr/src/eval/rpn_print.c
new file mode 100644
index 0000000..defb519
--- /dev/null
+++ b/21sh/ll-expr/src/eval/rpn_print.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+
+#include "lexer.h"
+#include "parser.h"
+
+char tab[] = { [AST_PLUS] = '+',
+               [AST_MINUS] = '-',
+               [AST_MUL] = '*',
+               [AST_DIV] = '/' };
+
+void print_ast(struct ast *ast)
+{
+    if (!ast)
+        return;
+
+    if (ast->type == AST_NUMBER)
+        printf("%zu ", ast->value);
+    else if (ast->type == AST_NEG)
+        printf("-%zu ", (ast->left)->value);
+    else
+    {
+        print_ast(ast->left);
+        print_ast(ast->right);
+
+        printf("%c ", tab[ast->type]);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    if (argc != 2)
+        return 1;
+
+    struct lexer *lexer = lexer_new(argv[1]);
+
+    struct ast *ast;
+    enum parser_status status;
+    ast = parse(&status, lexer);
+    if (status != PARSER_OK)
+    {
+        lexer_free(lexer);
+        return 1;
+    }
+
+    print_ast(ast);
+    printf("\n");
+
+    ast_free(ast);
+    lexer_free(lexer);
+
+    return 0;
+}
diff --git a/21sh/ll-expr/src/eval/token_printer.c b/21sh/ll-expr/src/eval/token_printer.c
new file mode 100644
index 0000000..78096f4
--- /dev/null
+++ b/21sh/ll-expr/src/eval/token_printer.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+
+#include "lexer.h"
+
+char tab[] = {
+    [TOKEN_PLUS] = '+', [TOKEN_MINUS] = '-',    [TOKEN_MUL] = '*',
+    [TOKEN_DIV] = '/',  [TOKEN_LEFT_PAR] = '(', [TOKEN_RIGHT_PAR] = ')'
+};
+
+int main(int argc, char *argv[])
+{
+    if (argc != 2)
+        return 1;
+
+    struct lexer *lexer = lexer_new(argv[1]);
+    struct token token = lexer_pop(lexer);
+
+    while (token.type != TOKEN_EOF && token.type != TOKEN_ERROR)
+    {
+        if (token.type == TOKEN_NUMBER)
+            printf("%zu\n", token.value);
+        else
+            printf("%c\n", tab[token.type]);
+
+        token = lexer_pop(lexer);
+    }
+
+    if (token.type == TOKEN_EOF)
+        printf("EOF\n");
+
+    lexer_free(lexer);
+
+    return 0;
+}