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hush: rework input char buffering to allow more than one-deep peek

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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>
This commit is contained in:
Denys Vlasenko
2016-09-29 16:59:06 +02:00
parent 3b4d04b77e
commit 8286513838
10 changed files with 177 additions and 0 deletions
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3
shell/ash_test/ash-vars/var_unbackslash1.right Normal file
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@@ -0,0 +1,3 @@
Ok
Ba d
Ok