From 74c6a747a58b38131534556ab95fa4dd4b514780 Mon Sep 17 00:00:00 2001
From: scratko <m@scratko.xyz>
Date: Thu, 20 Jun 2024 18:38:11 +0300
Subject: Shell-edit release

Autocomplete program and file names (tab).
Moving the cursor to edit commands (left and right arrows).
Deleting a character in a command (backspace).
---
 lexical_analysis.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

(limited to 'lexical_analysis.c')

diff --git a/lexical_analysis.c b/lexical_analysis.c
index 4349a69..5db57cb 100644
--- a/lexical_analysis.c
+++ b/lexical_analysis.c
@@ -123,11 +123,13 @@ int is_redirect_token(int ch, int next_ch)
  */
 int stream_redirect_tokens(struct w_queue *word_chain,
                            struct dynamic_array *tmp_word, int ch,
-                           struct param_type *params)
+                           struct param_type *params,
+                           struct readline_type *readline)
 {
     int next_ch;
-    next_ch = getchar();
-    ungetc(next_ch, stdin);
+
+    if(ch == '>')
+        next_ch = readline->arr[readline->considered_index + 1];
 
     if(is_redirect_token(ch, next_ch)) {
         add_word_or_filename(word_chain, tmp_word, params);
@@ -138,7 +140,7 @@ int stream_redirect_tokens(struct w_queue *word_chain,
         if(validate_redirections(ch, next_ch, params)) {
             params->tokens = (ch == '>' && next_ch == '>') ? append : ch;
             if(is_double_token(params))
-                getchar();
+                ++readline->considered_index;
             return 1;
         } else
             params->wrong_command = err_redirect_stream_again;
@@ -178,7 +180,7 @@ int pipeline_token_processing(struct w_queue *word_chain,
 
     c_queue_push(cmdlines, cmdline);
     w_queue_clear(word_chain);
-    dynarr_drop_word(tmp_word);
+    dynarr_reset_array(tmp_word);
     return 1;
 }
 
@@ -187,11 +189,12 @@ int pipeline_token_processing(struct w_queue *word_chain,
  */
 int special_tokens(struct w_queue *word_chain, struct c_queue *cmdlines,
                    struct dynamic_array *tmp_word, int ch,
-                   struct param_type *params)
+                   struct param_type *params, struct readline_type *readline)
 {
-    int next_ch;
-    next_ch = getchar();
-    ungetc(next_ch, stdin);
+    int next_ch, i;
+
+    if(ch == '|' || ch == '&')
+        next_ch = readline->arr[readline->considered_index + 1];
 
     if(is_special_token(ch, next_ch)) {
         add_word_or_filename(word_chain, tmp_word, params);
@@ -208,8 +211,9 @@ int special_tokens(struct w_queue *word_chain, struct c_queue *cmdlines,
         } else if(ch == '&' && next_ch == '&')
             params->tokens = and;
         else if(ch == '&') {
-            while((ch = getchar()) != new_line) {
-                if(ch != whitespace && ch != tab) {
+            for(i = readline->considered_index+1; readline->arr[i] != new_line;
+                                                                        ++i) {
+                if(readline->arr[i] != whitespace && readline->arr[i] != tab) {
                     params->wrong_command = err_bg_process;
                     return 0;
                 }
@@ -217,7 +221,7 @@ int special_tokens(struct w_queue *word_chain, struct c_queue *cmdlines,
             params->tokens = '&';
         }
         if(is_double_token(params))
-                getchar();
+            ++readline->considered_index;
         return 1;
     }
     return 0;
-- 
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