version shell-V with commented out code

1 files changed, 84 insertions, 0 deletions

diff --git a/lexical_analysis.h b/lexical_analysis.h
new file mode 100644
index 0000000..e0f791a
--- /dev/null
+++ b/lexical_analysis.h
@@ -0,0 +1,84 @@
+#ifndef LEXICAL_ANALYSIS_H_SENTRY
+#define LEXICAL_ANALYSIS_H_SENTRY
+
+#include "queue.h"
+#include "dynamic_array.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+enum {
+    new_line        = 10,
+    whitespace      = ' ',
+    tab             = 9,
+    backslash       = '\\',
+    double_quotes   = '"'
+};
+
+/* two-letter tokens */
+enum {
+    append          = '>' + 1,
+    and             = '&' + 1,
+    or              = '|' + 1
+};
+
+/* 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 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);
+
+int is_double_quotes_pair(struct param_type params);
+int escape_double_quotes_or_backslash(int ch, struct param_type params);
+int double_quotes_again(int ch, struct param_type params);
+int check_separation(int ch, struct param_type params);
+int ignore_spaces(int ch, struct param_type params);
+int change_mode(int ch, struct param_type params);
+int start_escape_sequence(int ch, struct param_type params);
+int is_empty_word(int ch, struct param_type params);
+int command_execution_condition(struct param_type *params);
+
+int is_special_token(int ch);
+int is_redirect_token(int ch, int next_ch);
+int excessive_words(int ch, struct param_type *params);
+void add_word_or_filename(struct w_queue *word_chain,
+                          struct dynamic_array *tmp_word,
+                          struct param_type *params);
+int validate_redirections(int ch, int next_ch, struct param_type *params);
+int is_double_token(struct param_type *params);
+
+int stream_redirect_tokens(struct w_queue *word_chain,
+                           struct dynamic_array *tmp_word,
+                           int ch, struct param_type *params);
+int double_quotes_again(int ch, struct param_type params);
+int pipeline_token_processing(struct w_queue *word_chain,
+                              struct c_queue *cmdlines,
+                              struct dynamic_array *tmp_word,
+                              struct param_type *params);
+
+int special_tokens(struct w_queue *word_chain, struct c_queue *cmdlines,
+                   struct dynamic_array *tmp_word, int ch,
+                   struct param_type *params);
+#endif