[PATCH 5/6] getch: debugging

[Simon Glass]

Signed-off-by: Simon Glass <s...@chromium.org>
---

 common/cli_getch.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/common/cli_getch.c b/common/cli_getch.c
index 61d4cb261b81..cd44415a9f67 100644
--- a/common/cli_getch.c
+++ b/common/cli_getch.c
@@ -6,8 +6,11 @@
  * Copyright 2022 Google LLC
  */
 
+#define LOG_CATEGORY LOGC_CORE
+
 #include <common.h>
 #include <cli.h>
+#include <log.h>
 
 /**
  * enum cli_esc_state_t - indicates what to do with an escape character
@@ -134,6 +137,8 @@ static int cli_ch_esc(struct cli_ch_state *cch, int ichar,
 
 int cli_ch_process(struct cli_ch_state *cch, int ichar)
 {
+       log_debug(" [ichar=%x, esc_len=%d] ", ichar, cch->esc_len);
+
        /*
         * ichar=0x0 when error occurs in U-Boot getchar() or when the caller
         * wants to check if there are more characters saved in the escape
@@ -141,12 +146,18 @@ int cli_ch_process(struct cli_ch_state *cch, int ichar)
         */
        if (!ichar) {
                if (cch->emitting) {
-                       if (cch->emit_upto < cch->esc_len)
-                               return cch->esc_save[cch->emit_upto++];
+                       if (cch->emit_upto < cch->esc_len) {
+                               int ch;
+
+                               ch = cch->esc_save[cch->emit_upto++];
+                               log_debug(" [->%x] ", ch);
+                               return ch;
+                       }
                        cch->emit_upto = 0;
                        cch->emitting = false;
                        cch->esc_len = 0;
                }
+               log_debug(" [->0] ");
                return 0;
        } else if (ichar == -ETIMEDOUT) {
                /*
@@ -156,15 +167,19 @@ int cli_ch_process(struct cli_ch_state *cch, int ichar)
                 */
                if (cch->esc_len) {
                        cch->esc_len = 0;
+                       log_debug(" [->esc] ");
                        return '\e';
                }
 
                /* Otherwise there is nothing to return */
+               log_debug(" [->0] ");
                return 0;
        }
 
-       if (ichar == '\n' || ichar == '\r')
+       if (ichar == '\n' || ichar == '\r') {
+               log_debug(" [->nl] ");
                return '\n';
+       }
 
        /* handle standard linux xterm esc sequences for arrow key, etc. */
        if (cch->esc_len != 0) {
@@ -186,6 +201,7 @@ int cli_ch_process(struct cli_ch_state *cch, int ichar)
                        cch->esc_save[cch->esc_len++] = ichar;
                        ichar = cch->esc_save[cch->emit_upto++];
                        cch->emitting = true;
+                       log_debug(" [->reject %x] ", ichar);
                        return ichar;
                case ESC_CONVERTED:
                        /* valid escape sequence, return the resulting char */
@@ -205,5 +221,6 @@ int cli_ch_process(struct cli_ch_state *cch, int ichar)
                return 0;
        }
 
+       log_debug(" [->%x] ", ichar);
        return ichar;
 }
-- 
2.41.0.162.gfafddb0af9-goog