emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
16,073 Commits 1 Branch 0 Tags 33 MiB
81293c8af0
Commit Graph

269 Commits

Author SHA1 Message Date
Denys Vlasenko
694d2982e5 bc: code shrink 
function                                             old     new   delta
bc_program_name                                       67      63      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-4)               Total: -4 bytes
   text	   data	    bss	    dec	    hex	filename
 981372	    485	   7296	 989153	  f17e1	busybox_old
 981368	    485	   7296	 989149	  f17dd	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 19:17:11 +01:00
Denys Vlasenko
7b30bc0222 bc: shrink bc_program_pushVar() 
function                                             old     new   delta
bc_program_pushVar                                   203     198      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 17:14:34 +01:00
Denys Vlasenko
d340143247 bc: get rid of G.prog.ob, G.prog.strmb 
function                                             old     new   delta
zbc_num_printNum                                     489     540     +51
zbc_program_asciify                                  426     473     +47
zbc_program_print                                    686     684      -2
zbc_program_exec                                    4008    3995     -13
zbc_program_assign                                   474     440     -34
bc_vm_init                                           739     663     -76
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/4 up/down: 98/-125)           Total: -27 bytes
   text	   data	    bss	    dec	    hex	filename
 981404	    485	   7296	 989185	  f1801	busybox_old
 981377	    485	   7296	 989158	  f17e6	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 17:00:35 +01:00
Denys Vlasenko
09fe0aaefa bc: do not show -i in --help, it's a NOP (for now) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 16:32:25 +01:00
Denys Vlasenko
7f2d59c38d bc: style edit, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 16:24:07 +01:00
Denys Vlasenko
3f940c9c70 bc: shrink bc_program_index() 
function                                             old     new   delta
bc_program_index                                      66      47     -19
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-19)             Total: -19 bytes
   text	   data	    bss	    dec	    hex	filename
 981418	    485	   7296	 989199	  f180f	busybox_old
 981399	    485	   7296	 989180	  f17fc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 15:49:42 +01:00
Denys Vlasenko
55f3cab7e9 bc: fix "echo -n '#foo' | bc" not eating last 'o' 
function                                             old     new   delta
zdc_parse_expr                                       656     653      -3
bc_lex_lineComment                                    39      36      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-6)               Total: -6 bytes
   text	   data	    bss	    dec	    hex	filename
 981424	    485	   7296	 989205	  f1815	busybox_old
 981418	    485	   7296	 989199	  f180f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 14:39:33 +01:00
Denys Vlasenko
a199cc95b7 bc: shrink zdc_parse_expr() 
function                                             old     new   delta
zdc_parse_expr                                       656     653      -3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 14:11:35 +01:00
Denys Vlasenko
07597cd35d bc: optimize zbc_lex_string() 
function                                             old     new   delta
zbc_lex_next                                        2359    2353      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 14:03:20 +01:00
Denys Vlasenko
ef271da33f bc: shrink zdc_lex_string() 
This actually fixes a rather obscure bug. This was failing to find
end of the string:

	$ echo -n '[foo]' | dc
	dc: string end could not be found

function                                             old     new   delta
zbc_lex_next                                        2230    2141     -89
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-89)             Total: -89 bytes
   text	   data	    bss	    dec	    hex	filename
 981461	    485	   7296	 989242	  f183a	busybox_old
 981372	    485	   7296	 989153	  f17e1	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 13:48:37 +01:00
Denys Vlasenko
d4258dd321 bc: another for() loop simplified 
function                                             old     new   delta
zbc_program_print                                    688     686      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 13:22:23 +01:00
Denys Vlasenko
5c0c5abba0 bc: simplify another for() loop 
function                                             old     new   delta
zbc_num_d                                            563     557      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 13:15:55 +01:00
Denys Vlasenko
6b0fbd14fc bc: rewrite more for() loops 
function                                             old     new   delta
bc_program_name                                       75      67      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 12:55:40 +01:00
Denys Vlasenko
71c82d1d8c bc: rewrite another for() loop 
function                                             old     new   delta
zbc_num_d                                            570     563      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 12:43:21 +01:00
Denys Vlasenko
e2e6ffd3c5 bc: replace signed division / 10 by unsigned 
function                                             old     new   delta
zbc_num_a                                            443     441      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 12:23:16 +01:00
Denys Vlasenko
4113e1f2cd bc: rewrite bc_num_compare() to be readable 
function                                             old     new   delta
bc_num_compare                                        59      51      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 03:30:23 +01:00
Denys Vlasenko
57734c926b bc: fold zbc_num_stream() into its single caller 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 03:30:23 +01:00
Denys Vlasenko
f6e3f8511e bc: get rid of BcNum BcProgram::ib,hexb 
function                                             old     new   delta
zbc_program_num                                      907     943     +36
zbc_program_assign                                   485     474     -11
bc_vm_init                                           757     739     -18
bc_num_ten                                            30       -     -30
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 36/-59)            Total: -23 bytes
   text	   data	    bss	    dec	    hex	filename
 981532	    485	   7296	 989313	  f1881	busybox_old
 981509	    485	   7296	 989290	  f186a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 03:30:23 +01:00
Denys Vlasenko
0f31a5c79e bc: fixes to bugs found while testing 64-bit build 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 03:16:48 +01:00
Denys Vlasenko
f4f10720fe bc: fixed from 64-bit compile 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 02:23:53 +01:00
Denys Vlasenko
4b72aebe80 bc: remove "error after expression parsing" check 
It is misplaced: caller knows better what can or cannot follow the expression.
Sometimes even caller's caller: "if (1) return a+b else..." -
parser of "return" does not know that "else" after it is valid,
parser of stmt does not know it either, - only parser of
"if" knows it!

The removed code balked on e.g. "{ print 1 }" statement.

This does not break any valid programs, but starts accepting some
invalid ones, e.g. "print 1 print 2" would work.

function                                             old     new   delta
zcommon_parse_expr                                    40      32      -8
zbc_parse_name                                       509     494     -15
zbc_parse_stmt_possibly_auto                        1678    1638     -40
bc_parse_expr_empty_ok                              2025    1977     -48
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-111)           Total: -111 bytes
   text	   data	    bss	    dec	    hex	filename
 981599	    485	   7296	 989380	  f18c4	busybox_old
 981488	    485	   7296	 989269	  f1855	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 17:00:29 +01:00
Denys Vlasenko
b44a7f1d66 bc: tighten up input NUL handling 
function                                             old     new   delta
static.dc_lex_tokens                                   -      90     +90
bc_error_bad_character                                17      31     +14
static.dc_lex_regs                                     -      13     +13
bc_read_line                                         406     410      +4
bc_program_index                                      64      66      +2
dc_lex_regs                                           13       -     -13
zdc_parse_expr                                       671     656     -15
zbc_lex_next                                        2318    2230     -88
dc_lex_tokens                                         91       -     -91
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 3/2 up/down: 123/-207)          Total: -84 bytes
   text	   data	    bss	    dec	    hex	filename
 981667	    485	   7296	 989448	  f1908	busybox_old
 981599	    485	   7296	 989380	  f18c4	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 11:58:20 +01:00
Denys Vlasenko
e42cc19b51 bc: simplify zdc_parse_string() 
function                                             old     new   delta
bc_program_index                                      64      66      +2
zdc_parse_expr                                       671     656     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-15)             Total: -13 bytes
   text	   data	    bss	    dec	    hex	filename
 981667	    485	   7296	 989448	  f1908	busybox_old
 981655	    485	   7296	 989436	  f18fc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 11:02:26 +01:00
Denys Vlasenko
59d4ce935e bc: use common strings 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 10:42:31 +01:00
Denys Vlasenko
ec60318f15 bc: tidy up "z-function" macro machinery 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 10:34:02 +01:00
Denys Vlasenko
e4ba4c4371 bc: parse file arguments piecemeal (do not read entire file) 
function                                             old     new   delta
bc_read_line                                         336     406     +70
zbc_vm_execute_FILE                                    -      67     +67
zbc_lex_next                                        2309    2318      +9
zbc_program_exec                                    4002    4008      +6
bc_program_index                                      66      64      -2
bc_vm_run                                            139     124     -15
zbc_vm_file                                          208      32    -176
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/3 up/down: 152/-193)          Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 981736	    485	   7296	 989517	  f194d	busybox_old
 981667	    485	   7296	 989448	  f1908	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 09:51:43 +01:00
Denys Vlasenko
c5774a3458 bc: move fflush to the _actual_ execution loop 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 01:22:53 +01:00
Denys Vlasenko
51b22b1bce bc: fix typo: defone -> define 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 00:15:35 +01:00
Denys Vlasenko
94f72a387c bc: factor out common code 
function                                             old     new   delta
zbc_parse_stmt_allow_NLINE_before                      -      59     +59
bc_parse_pushJUMP_ZERO                                 -      27     +27
bc_parse_pushJUMP                                      -      27     +27
rewrite_label_to_current                               -      19     +19
zbc_vm_process                                       594     599      +5
zbc_lex_next_and_skip_NLINE                           22       -     -22
zbc_parse_stmt_fail_if_bare_NLINE                     28       -     -28
zbc_parse_stmt_possibly_auto                        1909    1678    -231
------------------------------------------------------------------------------
(add/remove: 4/2 grow/shrink: 1/1 up/down: 137/-281)         Total: -144 bytes
   text	   data	    bss	    dec	    hex	filename
 981879	    485	   7296	 989660	  f19dc	busybox_old
 981755	    485	   7296	 989536	  f1960	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-17 00:07:48 +01:00
Denys Vlasenko
5ebd2a6128 bc: remove use of "BcInstPtr ip" object from loop parsing 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1964    1909     -55
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-55)             Total: -55 bytes
   text	   data	    bss	    dec	    hex	filename
 981934	    485	   7296	 989715	  f1a13	busybox_old
 981879	    485	   7296	 989660	  f19dc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 23:35:04 +01:00
Denys Vlasenko
266aa00012 bc: store only index in p->exits, it's the only thing used there 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1967    1964      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3)               Total: -3 bytes
   text	   data	    bss	    dec	    hex	filename
 981937	    485	   7296	 989718	  f1a16	busybox_old
 981934	    485	   7296	 989715	  f1a13	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 23:24:25 +01:00
Denys Vlasenko
8e7686e457 bc: p->exits.func is never zero, do not check for that 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1978    1967     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-11)             Total: -11 bytes
   text	   data	    bss	    dec	    hex	filename
 981948	    485	   7296	 989729	  f1a21	busybox_old
 981937	    485	   7296	 989718	  f1a16	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 23:18:28 +01:00
Denys Vlasenko
de24e9d366 bc: remove redundant JUMP generation when parsing 'while' 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2065    2025     -40
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-40)             Total: -40 bytes
   text	   data	    bss	    dec	    hex	filename
 982035	    485	   7296	 989816	  f1a78	busybox_old
 981995	    485	   7296	 989776	  f1a50	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 23:02:22 +01:00
Denys Vlasenko
06ade77002 bc: simplify use of "ip" in loop parsing functions 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2106    2065     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-41)             Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 982076	    485	   7296	 989857	  f1aa1	busybox_old
 982035	    485	   7296	 989816	  f1a78	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 22:44:51 +01:00
Denys Vlasenko
146a79d19c bc: shring bc_lib[] 
function                                             old     new   delta
bc_lib                                              1586    1584      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 21:46:11 +01:00
Denys Vlasenko
15850832be bc: shrink zbc_parse_if() a bit more 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2180    2106     -74
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-74)             Total: -74 bytes
   text	   data	    bss	    dec	    hex	filename
 982152	    485	   7296	 989933	  f1aed	busybox_old
 982078	    485	   7296	 989859	  f1aa3	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 21:41:17 +01:00
Denys Vlasenko
6b5b46f817 bc: stop using p->exits when parsing if() 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2180    2138     -42

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 21:29:08 +01:00
Denys Vlasenko
7415633128 bc: preparation to stop using p->exits when parsing if() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 21:21:27 +01:00
Denys Vlasenko
5d18f6be90 bc: fix "print 1,2,3" parsing 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2245    2180     -65
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-65)             Total: -65 bytes
   text	   data	    bss	    dec	    hex	filename
 982237	    485	   7296	 990018	  f1b42	busybox_old
 982152	    485	   7296	 989933	  f1aed	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 21:08:30 +01:00
Denys Vlasenko
cb18b546f7 bc: disallow empty statement as function body 
$ bc
	define z() <cr>
	<cr>
	bc: no statement after 'define'

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2239    2245      +6
zbc_vm_process                                       589     594      +5
zbc_parse_stmt_fail_if_bare_NLINE                     25      28      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 14/0)               Total: 14 bytes
   text	   data	    bss	    dec	    hex	filename
 982216	    485	   7296	 989997	  f1b2d	busybox_old
 982237	    485	   7296	 990018	  f1b42	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 20:46:15 +01:00
Denys Vlasenko
2e8be023cb bc: allow only one <newline> between if() and stmt 
Attempt to have more than one causes this error message:

	$ bc -q
	if (1)<cr>
	<cr>
	bc: no statement after 'if'

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 20:41:32 +01:00
Denys Vlasenko
e6c40c48d9 bc: simplify bc_parse_pushName(), do not free name in it - avoids one strdup 
function                                             old     new   delta
zbc_parse_name                                       511     509      -2
zdc_parse_register                                    50      43      -7
bc_parse_pushName                                     61      39     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-31)             Total: -31 bytes
   text	   data	    bss	    dec	    hex	filename
 982183	    485	   7296	 989964	  f1b0c	busybox_old
 982152	    485	   7296	 989933	  f1aed	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 20:32:58 +01:00
Denys Vlasenko
563d93c9a4 bc: simplify zbc_parse_break_or_continue(), logic is the same 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2259    2224     -35
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-35)             Total: -35 bytes
   text	   data	    bss	    dec	    hex	filename
 982218	    485	   7296	 989999	  f1b2f	busybox_old
 982183	    485	   7296	 989964	  f1b0c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 19:47:40 +01:00
Denys Vlasenko
a50576a415 bc: fold zbc_parse_else() into its only caller 
While at it, allow newline between "else" and its body

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 19:21:57 +01:00
Denys Vlasenko
6d29879c67 bc: fold bc_parse_noElse() into its only caller 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 19:10:38 +01:00
Denys Vlasenko
9dc5d08baa bc: delete unused (write-only) BcParse::nbraces member 
function                                             old     new   delta
zbc_lex_next                                        2296    2309     +13
bc_parse_expr_empty_ok                              2021    2025      +4
bc_vm_init                                           760     757      -3
bc_num_printNewline                                   54      51      -3
zbc_num_divmod                                       156     150      -6
bc_parse_reset                                       113     106      -7
zbc_lex_number                                       200     192      -8
bc_parse_number                                       83      66     -17
zdc_parse_expr                                       707     671     -36
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/7 up/down: 17/-80)            Total: -63 bytes
   text	   data	    bss	    dec	    hex	filename
 982275	    485	   7296	 990056	  f1b68	busybox_old
 982212	    485	   7296	 989993	  f1b29	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 18:43:51 +01:00
Denys Vlasenko
202dd1943c bc: fixes for multi-line if/while/for 
function                                             old     new   delta
zbc_vm_process                                       561     589     +28
zbc_lex_next_and_skip_NLINE                            -      22     +22
zbc_parse_stmt_possibly_auto                        2232    2253     +21
zbc_lex_skip_if_at_NLINE                               -      14     +14
zbc_lex_number                                       192     200      +8
zbc_num_divmod                                       150     156      +6
bc_vm_run                                            134     139      +5
bc_vm_init                                           757     760      +3
bc_num_printNewline                                   51      54      +3
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 7/0 up/down: 110/0)             Total: 110 bytes
   text	   data	    bss	    dec	    hex	filename
 982138	    485	   7296	 989919	  f1adf	busybox_old
 982275	    485	   7296	 990056	  f1b68	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 17:30:35 +01:00
Denys Vlasenko
e9519e44a6 bc: fix handling of 'return' not in functions, and 'define f()<newline>{...}' 
function                                             old     new   delta
zbc_vm_process                                       561     597     +36
zbc_parse_stmt_possibly_auto                        2232    2253     +21
zbc_lex_number                                       192     200      +8
zbc_num_divmod                                       150     156      +6
bc_vm_run                                            134     139      +5
bc_vm_init                                           757     760      +3
bc_num_printNewline                                   51      54      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 7/0 up/down: 82/0)               Total: 82 bytes
   text	   data	    bss	    dec	    hex	filename
 982138	    485	   7296	 989919	  f1adf	busybox_old
 982247	    485	   7296	 990028	  f1b4c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 17:06:07 +01:00
Denys Vlasenko
d1d29b4245 bc: partially rewrite parser, tests pass, ^C might be broken now 
The entire control construct (if/while/for/funcdef) or {} block is
"eaten" by the corresponding parsing function, instead of maintaining
special "block flag stack" with magic bits in it, and returning to main
input loop after every inner statement (every input line, essentially).

This required moving line input deep into lexer - now zbc_lex_next()
triggers more reading when needed.

"block flag stack" is gone.

Correctness of ^C handling wasn't checked, might need fixing now.

if/else syntax is changed to match GNU bc: "else" can not be on
the next line (the rationale is that "if (1) 2" statement in interactive
mode should execute and print 2 instead of waiting for possible
"else ..." line).

This change fixes the following examples:

if (1) if (1) 1 else 2 else 3

if (0) 1 else if (1) 2

define w() { auto z; return 1; }

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                           -    2232   +2232
zbc_vm_process                                        89     561    +472
zbc_lex_next                                        1982    2296    +314
bc_vm_init                                           749     757      +8
bc_parse_expr_empty_ok                              2016    2021      +5
bc_num_printNewline                                   54      51      -3
zbc_program_read                                     289     280      -9
bc_parse_free                                         47      38      -9
bc_parse_reset                                       126     113     -13
bc_parse_create                                      108      92     -16
bc_parse_push_block_flag                              47       -     -47
bc_parse_noElse                                       48       -     -48
zbc_parse_text_init                                  113      59     -54
zbc_parse_body                                       121       -    -121
zbc_parse_else                                       125       -    -125
zbc_parse_endBody                                    254       -    -254
bc_vm_run                                            421     134    -287
zbc_parse_auto                                       290       -    -290
zcommon_parse                                        476       -    -476
zbc_parse_stmt                                      1682       7   -1675
------------------------------------------------------------------------------
(add/remove: 1/7 grow/shrink: 4/8 up/down: 3031/-3427)       Total: -396 bytes
   text	   data	    bss	    dec	    hex	filename
 982586	    485	   7296	 990367	  f1c9f	busybox_old
 982138	    485	   7296	 989919	  f1adf	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-16 16:10:38 +01:00
Denys Vlasenko
99b3762335 bc: lexer debugging, added some failing test cases 
function                                             old     new   delta
bc_parse_push_block_flag                               -      47     +47
zbc_parse_body                                       107     121     +14
zbc_num_divmod                                       156     150      -6
zbc_lex_number                                       200     192      -8
zbc_parse_endBody                                    264     254     -10
bc_parse_startBody                                    47       -     -47
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/3 up/down: 61/-71)            Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 982596	    485	   7296	 990377	  f1ca9	busybox_old
 982586	    485	   7296	 990367	  f1c9f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-15 20:06:59 +01:00
Denys Vlasenko
fd51e0c4d2 bc: simplify BC_INST_JUMP[_ZERO] handling 
function                                             old     new   delta
zbc_program_exec                                    4063    4050     -13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-15 15:07:14 +01:00
Denys Vlasenko
7db384338a bc: rewrite "block flag stack" using simple realloc'ed byte array 
Each access to current top flag took a function call + fetch of three data items
+ multiplication and some additions + and then following the resulting pointer.

After the change, it is: fetch pointer value + one byte access via this pointer.

function                                             old     new   delta
bc_parse_startBody                                    45      49      +4
bc_parse_free                                         46      47      +1
zbc_parse_auto                                       188     185      -3
bc_parse_push                                         14      11      -3
bc_vm_run                                            398     394      -4
zbc_vm_process                                        63      58      -5
zdc_parse_expr                                       638     632      -6
zbc_parse_body                                       101      95      -6
bc_parse_addFunc                                      31      25      -6
bc_parse_noElse                                       56      48      -8
zcommon_parse                                        341     331     -10
zbc_parse_else                                       134     123     -11
bc_parse_create                                      124     108     -16
zbc_parse_text_init                                  123     104     -19
zbc_parse_endBody                                    292     252     -40
zbc_parse_stmt                                      1479    1420     -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/14 up/down: 5/-196)          Total: -191 bytes
   text	   data	    bss	    dec	    hex	filename
 979880	    485	   7296	 987661	  f120d	busybox_old
 979689	    485	   7296	 987470	  f114e	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-15 00:49:16 +01:00
Denys Vlasenko
f10f17f8d3 bc: drop zbc_parse_endBody() bool parameter, move its code to caller which uses it 
function                                             old     new   delta
zbc_parse_stmt                                      1456    1479     +23
zbc_parse_body                                       103     101      -2
zbc_parse_endBody                                    326     292     -34
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 23/-36)            Total: -13 bytes
   text	   data	    bss	    dec	    hex	filename
 979893	    485	   7296	 987674	  f121a	busybox_old
 979880	    485	   7296	 987661	  f120d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 23:41:33 +01:00
Denys Vlasenko
0154d78738 bc: shorten one message, make defines more readable 
text	   data	    bss	    dec	    hex	filename
 979916	    485	   7296	 987697	  f1231	busybox_old
 979893	    485	   7296	 987674	  f121a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 23:32:51 +01:00
Denys Vlasenko
7b1df3db97 bc: pull zbc_lex_next() call out of zbc_parse_operator() into one caller that uses it 
function                                             old     new   delta
bc_parse_operator                                      -     144    +144
bc_parse_expr_empty_ok                              1788    1792      +4
zbc_parse_operator                                   170       -    -170
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/0 up/down: 148/-170)          Total: -22 bytes
   text	   data	    bss	    dec	    hex	filename
 979938	    485	   7296	 987719	  f1247	busybox_old
 979916	    485	   7296	 987697	  f1231	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 23:12:48 +01:00
Denys Vlasenko
17df882a57 bx: add more debug scaffolding 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 23:00:24 +01:00
Denys Vlasenko
2ea53a45b7 bc: convert macro bc_parse_push() to function, add debug infrastructure 
function                                             old     new   delta
bc_parse_push                                          -      14     +14
zbc_parse_else                                       132     134      +2
bc_parse_pushName                                     63      61      -2
zbc_parse_operator                                   174     170      -4
bc_parse_number                                       87      83      -4
zbc_parse_string                                      97      89      -8
bc_parse_pushIndex                                    68      60      -8
zbc_parse_endBody                                    339     326     -13
zbc_parse_name                                       401     387     -14
zdc_parse_mem                                        107      91     -16
zdc_parse_expr                                       680     638     -42
zbc_parse_stmt                                      1502    1456     -46
bc_parse_expr_empty_ok                              1838    1788     -50
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/11 up/down: 16/-207)         Total: -191 bytes
   text	   data	    bss	    dec	    hex	filename
 980129	    485	   7296	 987910	  f1306	busybox_old
 979938	    485	   7296	 987719	  f1247	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 17:51:17 +01:00
Denys Vlasenko
f86e960e7c bc: rename zbc_parse_text() to ..._init(), reuse existing code for library parsing 
function                                             old     new   delta
zbc_parse_text_init                                    -     123    +123
bc_vm_run                                            423     398     -25
zbc_parse_text                                       123       -    -123
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/1 up/down: 123/-148)          Total: -25 bytes
   text	   data	    bss	    dec	    hex	filename
 980154	    485	   7296	 987935	  f131f	busybox_old
 980129	    485	   7296	 987910	  f1306	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 17:02:27 +01:00
Denys Vlasenko
0a23814e98 bc: compress two constant arguments of bc_lex_assign() to one 
function                                             old     new   delta
zbc_program_num                                      836     835      -1
bc_lex_assign                                         34      31      -3
zbc_lex_next                                        1930    1880     -50
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-54)             Total: -54 bytes
   text	   data	    bss	    dec	    hex	filename
 980208	    485	   7296	 987989	  f1355	busybox_old
 980154	    485	   7296	 987935	  f131f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 16:48:34 +01:00
Denys Vlasenko
8226912b2c bc: remove stale comment, empty lines, regularize comment style 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 16:30:56 +01:00
Denys Vlasenko
87b49beeda bc: tweak bc_num_parseDecimal() for readability, logic is not changed 
function                                             old     new   delta
zbc_program_num                                      836     835      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 16:24:01 +01:00
Denys Vlasenko
240d7ee3fc bc: shrink s() in library again 
function                                             old     new   delta
bc_lib                                              1596    1586     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-10)             Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 980152	    485	   7296	 987933	  f131d	busybox_old
 980142	    485	   7296	 987923	  f1313	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 11:27:09 +01:00
Denys Vlasenko
fc9d26902b bc: yet another library shrink 
function                                             old     new   delta
bc_lib                                              1604    1596      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-8)               Total: -8 bytes
   text	   data	    bss	    dec	    hex	filename
 980160	    485	   7296	 987941	  f1325	busybox_old
 980152	    485	   7296	 987933	  f131d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 11:00:23 +01:00
Denys Vlasenko
c06537d9bb bc: shrink internal library yet more 
function                                             old     new   delta
bc_lib                                              1609    1604      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-5)               Total: -5 bytes
   text	   data	    bss	    dec	    hex	filename
 980165	    485	   7296	 987946	  f132a	busybox_old
 980160	    485	   7296	 987941	  f1325	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 10:10:37 +01:00
Denys Vlasenko
203210e253 bc: shrink internal library more 
function                                             old     new   delta
bc_lib                                              1618    1609      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 09:53:50 +01:00
Denys Vlasenko
3ac0c21a1f bc: shrink internal library 
function                                             old     new   delta
bc_lib                                              1674    1618     -56

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 01:01:01 +01:00
Denys Vlasenko
57b6918b0a bc: group ENABLE_BC code a bit better, no logic changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-14 00:12:13 +01:00
Denys Vlasenko
5f263f406c bc: fix "dc only" bug 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 22:49:59 +01:00
Denys Vlasenko
e755e30402 bc: unbreak "only bc" and "only dc" configs 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 22:25:28 +01:00
Denys Vlasenko
89198a9e5d bc: simplify bc_lex_whitespace() 
function                                             old     new   delta
bc_lex_whitespace                                     52      41     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 21:31:29 +01:00
Denys Vlasenko
bbcecc4118 bc: G.sbgn and G.send are unused, remove them 
function                                             old     new   delta
bc_program_index                                      66      64      -2
bc_parse_expr_empty_ok                              1840    1838      -2
dc_main                                              176     168      -8
bc_main                                               73      65      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-20)             Total: -20 bytes
   text	   data	    bss	    dec	    hex	filename
 980327	    485	   7296	 988108	  f13cc	busybox_old
 980307	    485	   7296	 988088	  f13b8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 21:17:43 +01:00
Denys Vlasenko
0fe270e775 bc: simplify filename saving in zbc_vm_file() 
function                                             old     new   delta
bc_vm_run                                            433     423     -10
zbc_vm_file                                          187     174     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-23)             Total: -23 bytes
   text	   data	    bss	    dec	    hex	filename
 980350	    485	   7296	 988131	  f13e3	busybox_old
 980327	    485	   7296	 988108	  f13cc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 19:58:58 +01:00
Denys Vlasenko
915c72b273 bc: do not append duplicate NUL, reduce indentation in bc_read_line() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 19:29:02 +01:00
Denys Vlasenko
82ea67fbfa bc: change bc_read_line() and zbc_vm_stdin() to avoid double buffers 
function                                             old     new   delta
bc_read_line                                         129     124      -5
bc_vm_run                                            523     433     -90
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-95)             Total: -95 bytes
   text	   data	    bss	    dec	    hex	filename
 980445	    485	   7296	 988226	  f1442	busybox_old
 980350	    485	   7296	 988131	  f13e3	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 19:24:42 +01:00
Denys Vlasenko
b7e61e3e4a bc: further simplification in zbc_vm_stdin() 
function                                             old     new   delta
bc_vm_run                                            500     523     +23
bc_vec_concat                                         66       -     -66
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 23/-66)            Total: -43 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 18:16:39 +01:00
Denys Vlasenko
818b602c88 bc: fix another thinko 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 17:56:35 +01:00
Denys Vlasenko
335b4efd2f bc: fix a thinko: dc uses [] string delimiters, bot bc! 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 17:46:26 +01:00
Denys Vlasenko
766f67250f bc: fix comment handling 
function                                             old     new   delta
bc_vm_run                                            514     513      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 17:43:23 +01:00
Denys Vlasenko
7dc0a51286 bc: further zbc_vm_stdin() optimizations 
function                                             old     new   delta
bc_vm_run                                            534     514     -20

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 17:36:41 +01:00
Denys Vlasenko
40534bb6e2 bc: shrink zbc_vm_stdin() 
function                                             old     new   delta
bc_vm_run                                            592     534     -58

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 17:27:00 +01:00
Denys Vlasenko
89e785af98 bc: trim config help text, add a few comments, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-13 16:35:52 +01:00
Denys Vlasenko
9811ad02bd bc: unbreak CONFIG_FEATURE_BC_SIGNALS=y config 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 23:25:13 +01:00
Denys Vlasenko
c2265f526e bc: remove lexer function pointer 
function                                             old     new   delta
zbc_lex_next                                          81    1930   +1849
bc_parse_create                                      131     124      -7
common_parse_init                                     31       -     -31
zdc_lex_token                                        672       -    -672
zbc_lex_token                                       1193       -   -1193
------------------------------------------------------------------------------
(add/remove: 0/3 grow/shrink: 1/1 up/down: 1849/-1903)        Total: -54 bytes
   text	   data	    bss	    dec	    hex	filename
 980634	    485	   7296	 988415	  f14ff	busybox_old
 980580	    485	   7296	 988361	  f14c9	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 23:14:44 +01:00
Denys Vlasenko
c0ef23ca40 bc: remove parse function pointer 
function                                             old     new   delta
zbc_program_asciify                                    -     372    +372
zcommon_parse                                          -     341    +341
zbc_program_printStream                                -     141    +141
zbc_program_pushArray                                  -     111    +111
zbc_program_nquit                                      -      92     +92
zbc_vm_process                                        61      63      +2
zbc_parse_text                                       122     123      +1
bc_vm_run                                            591     592      +1
zdc_parse_mem                                        108     107      -1
zbc_parse_operator                                   175     174      -1
zbc_parse_else                                       133     132      -1
zbc_parse_body                                       104     103      -1
zbc_program_read                                     261     259      -2
zdc_parse_register                                    40      37      -3
zbc_parse_string                                     100      97      -3
zbc_parse_endBody                                    343     339      -4
zdc_parse_expr                                       688     680      -8
zbc_parse_auto                                       198     188     -10
zbc_parse_name                                       414     401     -13
common_parse_init                                     45      31     -14
zdc_parse_parse                                       23       -     -23
bc_parse_create                                      158     131     -27
zbc_parse_stmt                                      1540    1502     -38
bc_parse_expr_empty_ok                              1882    1840     -42
zbc_program_exec                                    3963    3837    -126
zbc_parse_parse                                      311       -    -311
zbc_program_modexp                                   556       -    -556
------------------------------------------------------------------------------
(add/remove: 5/3 grow/shrink: 3/16 up/down: 1061/-1184)      Total: -123 bytes
   text	   data	    bss	    dec	    hex	filename
 980757	    485	   7296	 988538	  f157a	busybox_old
 980634	    485	   7296	 988415	  f14ff	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 23:03:10 +01:00
Denys Vlasenko
19f110751d bc: convert two more functions to "z" logic 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 22:48:19 +01:00
Denys Vlasenko
8a89247e0a bc: remove BC_STATUS_EOF (again), the condition is detectable as len==0 
function                                             old     new   delta
bc_read_line                                         147     129     -18
bc_vm_run                                            618     591     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-45)             Total: -45 bytes
   text	   data	    bss	    dec	    hex	filename
 980802	    485	   7296	 988583	  f15a7	busybox_old
 980757	    485	   7296	 988538	  f157a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 22:43:58 +01:00
Denys Vlasenko
d8078a79be dc: fix EOF handling in case of last line being incomplete 
This wasn't working correctly:

$ echo -ne '10 20+p' | dc
30

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 21:56:06 +01:00
Denys Vlasenko
d6ad3666dc bc: further conversions to "z" logic 
function                                             old     new   delta
bc_program_exec                                     3876       -   -3876
zbc_program_exec                                       -    3963   +3963
bc_program_execStr                                   429       -    -429
zbc_program_execStr                                    -     427    +427
bc_vm_file                                           197       -    -197
zbc_vm_file                                            -     187    +187
bc_vm_process                                         74       -     -74
zbc_vm_process                                         -      61     +61
bc_parse_pushIndex                                    66      68      +2
bc_vm_run                                            624     618      -6
dc_main                                              187     176     -11
bc_program_reset                                      64       -     -64
zbc_program_pushArray                                111       -    -111
------------------------------------------------------------------------------
(add/remove: 4/6 grow/shrink: 1/2 up/down: 4640/-4768)       Total: -128 bytes
   text	   data	    bss	    dec	    hex	filename
 980922	    485	   7296	 988703	  f161f	busybox_old
 980794	    485	   7296	 988575	  f159f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 21:39:10 +01:00
Denys Vlasenko
c2da68e896 bc: optimize bc_parse_pushIndex() 
function                                             old     new   delta
bc_parse_pushIndex                                    80      68     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 16:44:34 +01:00
Denys Vlasenko
26819db9a3 bc: convert even more of lexer functions to "z" convention 
function                                             old     new   delta
bc_parse_name                                        416       -    -416
zbc_parse_name                                         -     414    +414
bc_parse_parse                                       305       -    -305
zbc_parse_parse                                        -     311    +311
bc_program_read                                      271       -    -271
zbc_program_read                                       -     261    +261
bc_parse_text                                        129       -    -129
zbc_parse_text                                         -     122    +122
dc_parse_parse                                        26       -     -26
zdc_parse_parse                                        -      23     +23
bc_program_index                                      66      64      -2
bc_vm_process                                         92      74     -18
bc_program_execStr                                   460     429     -31
bc_parse_expr_empty_ok                              1939    1882     -57
------------------------------------------------------------------------------
(add/remove: 5/5 grow/shrink: 0/4 up/down: 1131/-1255)       Total: -124 bytes
   text	   data	    bss	    dec	    hex	filename
 981058	    485	   7296	 988839	  f16a7	busybox_old
 980934	    485	   7296	 988715	  f162b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 16:09:47 +01:00
Denys Vlasenko
ae0faf91d0 bc: convert even more of lexer functions to "z" convention 
function                                             old     new   delta
bc_parse_stmt                                       1594       -   -1594
zbc_parse_stmt                                         -    1540   +1540
common_parse_expr                                     43       -     -43
zcommon_parse_expr                                     -      40     +40
bc_parse_expr                                         24       -     -24
zbc_parse_expr                                         -      24     +24
zbc_parse_body                                       108     104      -4
bc_program_read                                      277     271      -6
bc_program_execStr                                   468     460      -8
bc_parse_expr_empty_ok                              1955    1939     -16
bc_parse_name                                        451     416     -35
bc_parse_parse                                       476     305    -171
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 0/6 up/down: 1604/-1901)       Total: -297 bytes
   text	   data	    bss	    dec	    hex	filename
 981355	    485	   7296	 989136	  f17d0	busybox_old
 981058	    485	   7296	 988839	  f16a7	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 15:19:54 +01:00
Denys Vlasenko
8cd468f604 bc: convert more of lexer functions to "z" convention 
function                                             old     new   delta
dc_parse_expr                                        748       -    -748
zdc_parse_expr                                         -     688    +688
bc_parse_endBody                                     338       -    -338
zbc_parse_endBody                                      -     343    +343
bc_parse_auto                                        201       -    -201
zbc_parse_auto                                         -     198    +198
dc_parse_mem                                         115       -    -115
zdc_parse_mem                                          -     108    +108
bc_parse_body                                        116       -    -116
zbc_parse_body                                         -     108    +108
bc_parse_string                                      102       -    -102
zbc_parse_string                                       -     100    +100
dc_parse_register                                     43       -     -43
zdc_parse_register                                     -      40     +40
common_parse_expr                                     40      43      +3
bc_parse_parse                                       321     476    +155
bc_parse_stmt                                       1598    1594      -4
dc_parse_parse                                        44      26     -18
bc_parse_reset                                       153       -    -153
------------------------------------------------------------------------------
(add/remove: 7/8 grow/shrink: 2/2 up/down: 1743/-1838)        Total: -95 bytes
   text	   data	    bss	    dec	    hex	filename
 981450	    485	   7296	 989231	  f182f	busybox_old
 981355	    485	   7296	 989136	  f17d0	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 14:57:15 +01:00
Denys Vlasenko
9a34e89289 bc: partially convert lexer functions to "z" convention 
function                                             old     new   delta
bc_lex_token                                        1228       -   -1228
zbc_lex_token                                          -    1193   +1193
dc_lex_token                                         674       -    -674
zdc_lex_token                                          -     672    +672
bc_parse_operator                                    177       -    -177
zbc_parse_operator                                     -     175    +175
bc_parse_else                                        133       -    -133
zbc_parse_else                                         -     133    +133
bc_lex_next                                           91       -     -91
zbc_lex_next                                           -      81     +81
dc_parse_expr                                        744     748      +4
bc_parse_string                                      100     102      +2
bc_parse_body                                        114     116      +2
dc_parse_mem                                         116     115      -1
bc_parse_text                                        130     129      -1
dc_parse_register                                     51      43      -8
bc_parse_endBody                                     358     338     -20
bc_parse_name                                        513     451     -62
bc_parse_auto                                        265     201     -64
bc_parse_expr_empty_ok                              2032    1955     -77
bc_parse_parse                                       417     321     -96
bc_parse_stmt                                       1753    1598    -155
------------------------------------------------------------------------------
(add/remove: 5/5 grow/shrink: 3/9 up/down: 2262/-2787)       Total: -525 bytes
   text	   data	    bss	    dec	    hex	filename
 981975	    485	   7296	 989756	  f1a3c	busybox_old
 981450	    485	   7296	 989231	  f182f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 13:58:55 +01:00
Denys Vlasenko
251fbb57be bc: code shrink in bc_num_cmp() 
function                                             old     new   delta
bc_num_cmp                                           275     231     -44

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 11:51:32 +01:00
Denys Vlasenko
16494f557f bc: simplify zbc_program_logical() 
function                                             old     new   delta
bc_program_exec                                     3918    3876     -42
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-42)             Total: -42 bytes
   text	   data	    bss	    dec	    hex	filename
 982061	    485	   7296	 989842	  f1a92	busybox_old
 982019	    485	   7296	 989800	  f1a68	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 00:51:53 +01:00
Denys Vlasenko
69171dc466 bc: simplify nested read() check 
function                                             old     new   delta
bc_vm_run                                            622     624      +2
dc_main                                              186     187      +1
bc_main                                               72      73      +1
bc_program_read                                      312     277     -35
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 4/-35)             Total: -31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-12 00:29:24 +01:00
Denys Vlasenko
12b9eaf787 bc: in non-interactive config, POSIX error functions never return nonzero 
function                                             old     new   delta
bc_parse_expr_empty_ok                              2036    2032      -4
bc_parse_stmt                                       1767    1753     -14
bc_lex_token                                        1259    1228     -31
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-49)             Total: -49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-11 23:50:14 +01:00
Denys Vlasenko
f0f069b08f bc: use common_parse_init() in bc_vm_init() 
function                                             old     new   delta
common_parse_init                                     26      45     +19
dc_parse_init                                         17       -     -17
bc_parse_init                                         17       -     -17
bc_vm_init                                           744     725     -19
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/1 up/down: 19/-53)            Total: -34 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-11 23:22:52 +01:00
Denys Vlasenko
4dd3652c2f bc: fix EOF handling in bc_program_read() 
$ bc -q
read()
2^D^D2
     ^ prints the result of read()'ed expression

function                                             old     new   delta
zbc_program_print                                    629     642     +13
bc_program_read                                      322     312     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 13/-10)              Total: 3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-11 22:45:15 +01:00
Denys Vlasenko
2c6f563216 bc: tweak comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-11 21:21:14 +01:00