[RFC PATCH v7 20/23] cli: hush_2021: Enable loops

[Francis Laniel <francis.laniel@amarulasolutions.com>]

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 common/cli_hush_2021.c     |  1 +
 common/cli_hush_upstream.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/common/cli_hush_2021.c b/common/cli_hush_2021.c
index aba5dcbbcd..0a207d147b 100644
--- a/common/cli_hush_2021.c
+++ b/common/cli_hush_2021.c
@@ -34,6 +34,7 @@
 #define ENABLE_HUSH_INTERACTIVE	1
 #define ENABLE_FEATURE_EDITING	1
 #define ENABLE_HUSH_IF		1
+#define ENABLE_HUSH_LOOPS	1
 /* No MMU in U-Boot */
 #define BB_MMU			0
 #define USE_FOR_NOMMU(...)	__VA_ARGS__
diff --git a/common/cli_hush_upstream.c b/common/cli_hush_upstream.c
index 9b65dcbde1..23392939e1 100644
--- a/common/cli_hush_upstream.c
+++ b/common/cli_hush_upstream.c
@@ -10349,7 +10349,7 @@ static int run_list(struct pipe *pi)
 #ifndef __U_BOOT__
 	for (; pi; pi = IF_HUSH_LOOPS(rword == RES_DONE ? loop_top : ) pi->next) {
 #else /* __U_BOOT__ */
-	for (; pi; pi = pi->next) {
+	for (; pi; pi = rword == RES_DONE ? loop_top : pi->next) {
 #endif /* __U_BOOT__ */
 		int r;
 		int sv_errexit_depth;
@@ -10451,7 +10451,20 @@ static int run_list(struct pipe *pi)
 			}
 			/* Insert next value from for_lcur */
 			/* note: *for_lcur already has quotes removed, $var expanded, etc */
+#ifndef __U_BOOT__
 			set_local_var(xasprintf("%s=%s", pi->cmds[0].argv[0], *for_lcur++), /*flag:*/ 0);
+#else /* __U_BOOT__ */
+			/* We cannot use xasprintf, so we emulate it. */
+			char *full_var;
+			char *var = pi->cmds[0].argv[0];
+			char *val = *for_lcur++;
+
+			/* + 1 to take into account =. */
+			full_var = xmalloc(strlen(var) + strlen(val) + 1);
+			sprintf(full_var, "%s=%s", var, val);
+
+			set_local_var_2021(full_var, /*flag:*/ 0);
+#endif /* __U_BOOT__ */
 			continue;
 		}
 		if (rword == RES_IN) {
-- 
2.34.1