error handling (WIP)

[z180-stamp.git] / avr / command.c

diff --git a/avr/command.c b/avr/command.c
index ff527575f33dc67c7b203c3e907ceb53d5a7fedb..b0d9c90219010a18d161fb52b045d9f14481715e 100644 (file)
--- a/avr/command.c
+++ b/avr/command.c
@@ -100,7 +100,7 @@ static cmd_tbl_t *get_cmd_tbl_parent(cmd_tbl_t  *child)
        return NULL;
 }
 
-static int print_name_prefix(cmd_tbl_t *p)
+static int print_nameprefix(cmd_tbl_t *p)
 {
        cmd_tbl_t *top = get_cmd_tbl_parent(p);
 
@@ -112,13 +112,22 @@ static int print_name_prefix(cmd_tbl_t *p)
        return width;
 }
 
+static int print_prefixed_name(cmd_tbl_t *p)
+{
+       int len;
+
+       len = print_nameprefix(p);
+       len += strlen_P(p->name);
+       my_puts_P(p->name);
+
+       return len;
+}
+
 static void print_usage_line(cmd_tbl_t *p, int width)
 {
-       width -= strlen_P(p->name);
-       width -= print_name_prefix(p);
+       width -= print_prefixed_name(p);
        if (width < 0)
                width = 0;
-       my_puts_P(p->name);
        print_blanks(width);
        my_puts_P(PSTR(" - "));
        puts_P(p->usage);
@@ -414,8 +423,7 @@ command_ret_t cmd_usage(cmd_tbl_t *cmdtp)
        print_usage_line(cmdtp, 0);
 #ifdef CONFIG_SYS_LONGHELP
        my_puts_P(PSTR("Usage:\n"));
-       print_name_prefix(cmdtp);
-       my_puts_P(cmdtp->name);
+       print_prefixed_name(cmdtp);
        my_puts_P(PSTR(" "));
 
        if (cmdtp->help && *cmdtp->help != '\0')
@@ -686,6 +694,7 @@ int cmd_auto_complete(const FLASH char *const prompt, char *buf, int *np, int *c
 #endif /* CONFIG_AUTO_COMPLETE */
 
 
+static cmd_tbl_t *cmd_invocation_ptr;
 
 /**
  * Call a command function. This should be the only route in U-Boot to call
@@ -760,6 +769,7 @@ command_ret_t cmd_process(uint_fast8_t flag, int argc, char * const argv[],
 
        /* If OK so far, then do the command */
        if (!rc) {
+               cmd_invocation_ptr = cmdtp;
                rc = cmd_call(cmdtp, flag, argc, argv);
                *repeatable &= (cmdtp->flags & CTBL_RPT) != 0;
        }
@@ -780,3 +790,17 @@ int cmd_process_error(cmd_tbl_t *cmdtp, int err)
 
        return 0;
 }
+
+
+void cmd_error(const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       print_prefixed_name(cmd_invocation_ptr);
+       my_puts_P(PSTR(": "));
+       vfprintf_P(stdout, fmt, ap);
+       va_end(ap);
+       putchar('\n');
+       _delay_ms(20);
+       //command_ret = CMD_RET_FAILURE;
+}