forks/busybox/shell/hush_test/hush-arith, branch 1_33_stable

ash: parser: Add syntax stack for recursive parsing

2018-04-02T11:15:37+00:00

This closes 10821. Upstream patch: From: Herbert Xu Date: Fri, 9 Mar 2018 00:14:02 +0800 parser: Add syntax stack for recursive parsing Without a stack of syntaxes we cannot correctly these two cases together: "${a#'$$'}" "${a#"${b-'$$'}"}" A recursive parser also helps in some other corner cases such as nested arithmetic expansion with paratheses. This patch adds a syntax stack allocated from the stack using alloca. As a side-effect this allows us to remove the naked backslashes for patterns within double-quotes, which means that EXP_QPAT also has to go. This patch also fixes removes any backslashes that precede right braces when they are present within a parameter expansion context, and backslashes that precede double quotes within inner double quotes inside a parameter expansion in a here-document context. The idea of a recursive parser is based on a patch by Harald van Dijk. Signed-off-by: Herbert Xu var_bash3, var_bash4 and var_bash6 tests are updated with the output given by bash-4.3.43 With this patch, the following tests now pass for ash: dollar_repl_slash_bash2.tests squote_in_varexp2.tests squote_in_varexp.tests var_bash4.tests function old new delta readtoken1 2615 2874 +259 synstack_push - 54 +54 evalvar 574 571 -3 rmescapes 330 310 -20 subevalvar 1279 1258 -21 argstr 1146 1107 -39 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/4 up/down: 313/-83) Total: 230 bytes Signed-off-by: Denys Vlasenko

shell: handle $((NUM++...) like bash does. Closes 10706

2018-01-28T19:13:33+00:00

function old new delta evaluate_string 680 729 +49 Signed-off-by: Denys Vlasenko

shell/math: deconvolute and explain ?: handling. Give better error message

2010-09-16T09:50:46+00:00

function old new delta arith_apply 1271 1283 +12 Signed-off-by: Denys Vlasenko

shell/math: return string error indicator, not integer

2010-09-15T11:33:02+00:00

function old new delta expand_and_evaluate_arith 87 106 +19 expand_one_var 1563 1570 +7 arith 12 18 +6 evaluate_string 678 680 +2 arith_apply 1269 1271 +2 builtin_umask 133 132 -1 ash_arith 118 75 -43 expand_vars_to_list 1094 1038 -56 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/3 up/down: 36/-100) Total: -64 bytes Signed-off-by: Denys Vlasenko

hush: fix more obscure ${var%...} cases

2010-05-21T22:26:06+00:00

function old new delta add_till_closing_paren 313 359 +46 builtin_exit 48 47 -1 Signed-off-by: Denys Vlasenko

hush: fix SEGV in % expansion

2009-04-26T11:25:19+00:00

function old new delta expand_variables 2203 2217 +14

hush: deal with some easier TODOs

2009-04-09T19:16:15+00:00

function old new delta is_well_formed_var_name - 87 +87 builtin_read 49 86 +37 die_if_script - 31 +31 syntax_error_unterminated - 28 +28 syntax_error 26 51 +25 done_word 768 788 +20 syntax_error_at - 12 +12 parse_stream_dquoted 320 328 +8 expand_variables 2064 2063 -1 run_list 1225 1220 -5 add_till_closing_paren 308 303 -5 add_till_backquote 111 106 -5 handle_dollar 812 803 -9 parse_stream 2378 2356 -22 parse_redirect 408 372 -36 maybe_die 44 - -44 is_assignment 215 134 -81 ------------------------------------------------------------------------------ (add/remove: 4/1 grow/shrink: 4/8 up/down: 248/-208) Total: 40 bytes

hush: rename ->o_quote to ->o_escape

2009-04-02T20:17:49+00:00

hush_test/hush-arith/*: new tests for arithmetic evaluation