1 files changed, 64 insertions, 0 deletions
diff --git a/shell.h b/shell.h
new file mode 100644
index 0000000..3fc11ad
--- /dev/null
+++ b/shell.h
@@ -0,0 +1,64 @@
+#ifndef SHELL_H_SENTRY
+#define SHELL_H_SENTRY
+
+#include "dynamic_array.h"
+#include "queue.h"
+
+enum {
+    /* CTRL-D  */
+    end_of_file     = 4,
+    new_line        = 10,
+    whitespace      = ' ',
+    tab             = 9,
+    esc             = 27,
+    backslash       = '\\',
+    double_quotes   = '"'
+};
+
+/* two-letter tokens */
+enum {
+    append          = '>' + 1,
+    and             = '&' + 1,
+    or              = '|' + 1
+};
+
+/* error codes */
+enum {
+    err_filename_expected           = 1,
+    err_redirect_stream_again       = 2,
+    err_redirect_stream_in_pipeline = 3,
+    err_bg_process                  = 4,
+    err_empty_command               = 5,
+    err_extra_chars_after_filename  = 6,
+    err_odd_double_quotes           = 7
+};
+
+/* storing file names to redirect standard input/output streams */
+struct io_type {
+    char *input_stream;
+    char *output_stream;
+    char *output_stream_to_append;
+};
+
+struct param_type {
+    int is_word;
+    int escape_sequences;
+    unsigned int double_quotes_counter;
+    char stored_symbol;
+    int empty_word_flag;
+    int tokens;
+    int wrong_command;
+    struct io_type streams;
+    int last_execution_status;
+    int pipeline;
+    int new_readline;
+};
+
+int filename_waiting(struct param_type *params);
+void add_filename(struct dynamic_array *tmp_word, struct param_type *params);
+void add_word(struct w_queue *word_chain, struct dynamic_array *tmp_word,
+              struct param_type *params);
+int is_stream_redirection_set(const struct param_type *params);
+char** create_cmdline(const struct w_queue *word_chain, int word_counter);
+
+#endif