From 270c926c3b2fc89157fdf430ad8581a2199ef061 Mon Sep 17 00:00:00 2001
From: Tilen Majerle <tilen.majerle@gmail.com>
Date: Sun, 21 Nov 2021 18:37:56 +0100
Subject: [PATCH] Add option for "listcmd" to list all registered commands

---
 dev/VisualStudio/lwshell_opts.h           |  3 ++-
 lwshell/src/include/lwshell/lwshell_opt.h | 11 ++++++++++-
 lwshell/src/lwshell/lwshell.c             | 17 +++++++++++++++++
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/dev/VisualStudio/lwshell_opts.h b/dev/VisualStudio/lwshell_opts.h
index 5ea5472..da21680 100644
--- a/dev/VisualStudio/lwshell_opts.h
+++ b/dev/VisualStudio/lwshell_opts.h
@@ -38,6 +38,7 @@
 
 #include "windows.h"
 
-#define LWSHELL_CFG_USE_OUTPUT          1
+#define LWSHELL_CFG_USE_OUTPUT              1
+#define LWSHELL_CFG_USE_ENABLE_LIST_CMD     1
 
 #endif /* LWSHELL_HDR_OPTS_H */
diff --git a/lwshell/src/include/lwshell/lwshell_opt.h b/lwshell/src/include/lwshell/lwshell_opt.h
index 070d484..6de5ede 100644
--- a/lwshell/src/include/lwshell/lwshell_opt.h
+++ b/lwshell/src/include/lwshell/lwshell_opt.h
@@ -1,4 +1,4 @@
-/**
+/**
  * \file            lwshell_opt.h
  * \brief           LwSHELL options
  */
@@ -97,6 +97,15 @@ extern "C" {
 #define LWSHELL_CFG_USE_OUTPUT                  1
 #endif
 
+/**
+ * \brief           Enables `1` or disables `0` generic ˙listcmd` command to list of registered commands
+ *
+ * \ref LWSHELL_CFG_USE_OUTPUT must be enabled to use this feature
+ */
+#ifndef LWSHELL_CFG_USE_ENABLE_LIST_CMD
+#define LWSHELL_CFG_USE_ENABLE_LIST_CMD         0
+#endif
+
 /**
  * \}
  */
diff --git a/lwshell/src/lwshell/lwshell.c b/lwshell/src/lwshell/lwshell.c
index cbf6154..6dd782f 100644
--- a/lwshell/src/lwshell/lwshell.c
+++ b/lwshell/src/lwshell/lwshell.c
@@ -34,6 +34,11 @@
 #include <string.h>
 #include "lwshell/lwshell.h"
 
+/* Check enabled features */
+#if LWSHELL_CFG_USE_ENABLE_LIST_CMD && !LWSHELL_CFG_USE_OUTPUT
+#error "To use list command feature, LWSHELL_CFG_USE_OUTPUT must be enabled"
+#endif
+
 /* Default characters */
 #define LWSHELL_ASCII_NULL                      0x00/*!< Null character */
 #define LWSHELL_ASCII_BACKSPACE                 0x08/*!< Backspace */
@@ -176,6 +181,18 @@ prv_parse_input(lwshell_t* lw) {
                 } else {
                     c->fn(lw->argc, lw->argv);
                 }
+#if LWSHELL_CFG_USE_ENABLE_LIST_CMD
+            } else if (strncmp(lw->argv[0], "listcmd", 7) == 0) {
+                LW_OUTPUT(lw, "List of registered commands\r\n");
+                for (size_t i = 0; i < cmds_cnt; ++i) {
+                    LW_OUTPUT(lw, cmds[i].name);
+                    LW_OUTPUT(lw, "\t\t\t");
+                    LW_OUTPUT(lw, cmds[i].desc);
+                    LW_OUTPUT(lw, "\r\n");
+                }
+#endif /* LWSHELL_CFG_USE_ENABLE_LIST_CMD */
+            } else {
+                LW_OUTPUT(lw, "Unknown command\r\n");
             }
         }
     }