hush: rework input char buffering to allow more than one-deep peek
This fixes backslash+newline continuation in
$VAR\
NAME
construct. (ash has a bug there as well).
function old new delta
file_peek2 - 74 +74
parse_dollar 746 773 +27
expand_vars_to_list 1143 1167 +24
setup_string_in_str 32 46 +14
setup_file_in_str 33 47 +14
file_get 264 278 +14
static_peek2 - 7 +7
file_peek 91 72 -19
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 5/1 up/down: 174/-19) Total: 155 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-vars/var_serial.right b/shell/ash_test/ash-vars/var_serial.right
new file mode 100644
index 0000000..42aa330
--- /dev/null
+++ b/shell/ash_test/ash-vars/var_serial.right
@@ -0,0 +1,5 @@
+Assignments only: c=a
+Assignments and a command: c=a
+Assignments and a builtin: c=a
+Assignments and a function: c=a
+Done