From 0c1fd482bd27c5a48d91c086558b4cf07ca6e000 Mon Sep 17 00:00:00 2001
From: milang <milan.garnier@orange.fr>
Date: Tue, 1 Oct 2019 19:30:42 +0200
Subject: [PATCH] add a custom ram weight

---
 liblog.c | 79 +++++++++++++++++++++++++++++++++++++++++++++-----------
 liblog.h |  2 ++
 2 files changed, 66 insertions(+), 15 deletions(-)

diff --git a/liblog.c b/liblog.c
index ede7a50..c1f5deb 100644
--- a/liblog.c
+++ b/liblog.c
@@ -38,15 +38,20 @@ typedef struct log_line
 static log_line first_line=
 {
     0,
-    "",
+    "You are at the top !",
     0,
     0
 };
 static log_line* current_line=&first_line;
 
-static int state;
+/// Change the following line to custom ram weight
+static int number_max_messages=2048; // 1Ko max
 
 
+static int number_messages=0;
+
+static int state=1;
+
 void ll_set_state(int s)
 {
     state = s;
@@ -57,21 +62,59 @@ int ll_get_state()
     return state;
 }
 
-static log_line* add_line()
+static log_line* cut_line()
 {
-    current_line->next = malloc(sizeof(log_line));
-    log_line* previous = current_line;
-    current_line = current_line->next;
-    current_line->previous=previous;
-    current_line->next=0;
-    current_line->cursor=0;
+	log_line* maillon = first_line.next;
+	log_line* maillon_suivant = maillon->next;
+
+	first_line.next=maillon_suivant;
+	maillon_suivant->previous=&first_line;
+
+	return maillon;
+}
+
+static void link_line(log_line* line)
+{
+	current_line->next=line;
+	line->previous=current_line;
+	current_line=line;
+}
+
+static void clear_line(log_line* line)
+{
+	line->next=0;
+	line->cursor=0;
     for (int i=0; i<MAX_LENGHT; i++)
         current_line->text[i]='\0';
+}
+
+static log_line* add_line()
+{
+    int malloc_fail=0;
+
+    log_line* line;
+    
+    int test=(number_messages*sizeof(log_line)>=number_max_messages);
+    if (!test)
+    {
+        number_messages++;
+        line = malloc(sizeof(log_line));
+        if (0==line)
+            malloc_fail=1;
+    }
+    
+    if (test || malloc_fail) // fail du malloc ou dépassement de la limite de ram imposée lors du build
+        line=cut_line();
+
+    link_line(line);
+    clear_line(line);
     return current_line;
+
 }
 
 void ll_clear()
 {
+    number_messages=0;
     while (current_line->previous)
     {
         log_line* next=current_line->previous;
@@ -84,14 +127,12 @@ void ll_clear()
         current_line->text[i]='\0';
 }
 
-static void show_line(const log_line* l, int y)
-{
-    dtext(1, y, &l->text[0], C_BLACK, C_NONE);
-}
+
 
 static void append_character(char c)
 {
-
+    if (current_line==&first_line)
+        add_line();
     if (c=='\n')
     {
         current_line->text[current_line->cursor] = '\0';
@@ -132,6 +173,11 @@ void ll_send(const char * txt)
     }
 }
 
+static void show_line(const log_line* l, int y)
+{
+    dtext(1, y, &l->text[0], C_BLACK, C_NONE);
+}
+
 void ll_display_custom(log_line* line)
 {
     dfont(NULL);
@@ -148,10 +194,12 @@ void ll_display_custom(log_line* line)
         if (!line)
             break;
     }
-    dupdate();
+    dupdate_noint();
 }
 
 
+
+
 void ll_display()
 {
     ll_display_custom(current_line);
@@ -159,6 +207,7 @@ void ll_display()
 
 void ll_pause()
 {
+    dclear(C_WHITE);
     log_line* line=current_line;
     while (1)
     {
diff --git a/liblog.h b/liblog.h
index 1bf0ae0..da2583f 100644
--- a/liblog.h
+++ b/liblog.h
@@ -26,4 +26,6 @@ void ll_pause();
 // Clear log
 void ll_clear();
 
+void ll_set_lenght();
+
 #endif