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1531 Commits

Author SHA1 Message Date
Denys Vlasenko
1476760600 bc: rename config options 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-28 13:32:04 +01:00
Denys Vlasenko
b097a84d62 config: update size information 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-28 03:20:17 +01:00
Denys Vlasenko
10bde14292 bc: rename functions common to bc and dc as xc_FOO() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-27 18:23:58 +01:00
Denys Vlasenko
db8d607514 bc: G.prog.zero does not need initializing num[] vector 
function                                             old     new   delta
bc_vm_init                                           676     665     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-27 18:08:49 +01:00
Denys Vlasenko
3d27d435db randomconfig fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-27 18:03:20 +01:00
Denys Vlasenko
2beb1f6faf bc: use ALIGN1 where appropriate 
text	   data	    bss	    dec	    hex	filename
 980138	    485	   7296	 987919	  f130f	busybox_old
 980128	    485	   7296	 987909	  f1305	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 21:17:12 +01:00
Denys Vlasenko
8af11087b2 bc: undo debugging change, add a small optimization 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 21:01:41 +01:00
Denys Vlasenko
ab9a98602f bc: simple speedups 
function                                             old     new   delta
bc_parse_pushName                                     20      56     +36
bc_program_index                                      47      71     +24
bc_parse_pushIndex                                    52      58      +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 66/0)               Total: 66 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 20:30:47 +01:00
Denys Vlasenko
f706a18f33 bc: use '\0' insteads of 0xff (BC_PARSE_STREND) as name terminator 
function                                             old     new   delta
zdc_program_printStream                                -     146    +146
zbc_program_exec                                    4003    4016     +13
zdc_parse_expr                                       473     470      -3
bc_parse_pushName                                     31      20     -11
bc_program_name                                       63      34     -29
zbc_program_pushArray                                147       -    -147
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/3 up/down: 159/-190)          Total: -31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 20:02:27 +01:00
Denys Vlasenko
1c69ec1597 bc: reduce indentation, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 19:24:15 +01:00
Denys Vlasenko
8a56e3643f bc: fix "bc only" build 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 19:09:23 +01:00
Denys Vlasenko
1e87b97da6 bc: fix "dc only" build 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 19:06:05 +01:00
Denys Vlasenko
2f7352b4f5 bc: comment out code which appears to be never reached 
function                                             old     new   delta
zbc_lex_next                                        1587    1568     -19

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 18:59:42 +01:00
Denys Vlasenko
b1b7996a2a bc: remove all logic for multi-line buffering 
function                                             old     new   delta
zbc_vm_process                                       865     874      +9
zbc_parse_text_init                                   51      38     -13
bc_read_line                                         394     345     -49
peek_inbuf                                           292      69    -223
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 9/-285)           Total: -276 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 18:46:03 +01:00
Denys Vlasenko
7d32e25bf3 bc: prepare for char-by-char input handling 
function                                             old     new   delta
peek_inbuf                                             -     292    +292
parse_lex_by_checking_eq_sign                          -      26     +26
eat_inbuf                                              -      22     +22
zbc_vm_execute_FILE                                   52      61      +9
bc_lex_lineComment                                    29      30      +1
zbc_lex_number                                       174     172      -2
bc_vm_run                                            104      99      -5
zbc_num_divmod                                       156     150      -6
bc_lex_file                                           24       -     -24
bc_lex_assign                                         26       -     -26
zbc_lex_next                                        1982    1587    -395
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 2/4 up/down: 350/-458)         Total: -108 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 18:32:43 +01:00
Denys Vlasenko
63ad799384 bc: fix handling of comment/string interactions while buffering input 
function                                             old     new   delta
zbc_lex_next                                        1965    1982     +17
zbc_num_divmod                                       150     156      +6
bc_read_line                                         411     394     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 23/-17)              Total: 6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-26 12:23:05 +01:00
Denys Vlasenko
94576d2b97 bc: fix interactive handling of comments in strings and quotes in comments 
function                                             old     new   delta
zbc_lex_next                                        1965    1979     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 23:45:57 +01:00
Denys Vlasenko
c192b0442b bc: simplify input pointer manipulation while lexing 
function                                             old     new   delta
bc_lex_name                                           70      68      -2
zbc_lex_number                                       177     174      -3
bc_vm_init                                           679     676      -3
bc_lex_whitespace                                     42      39      -3
zbc_parse_text_init                                   55      51      -4
bc_lex_lineComment                                    37      29      -8
bc_lex_assign                                         34      26      -8
zbc_lex_next                                        2039    1965     -74
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/8 up/down: 0/-105)           Total: -105 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 23:15:59 +01:00
Denys Vlasenko
ecb62edd47 bc: fold struct BcLex into BcParse 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 22:32:41 +01:00
Denys Vlasenko
6e6182342e bc: move BcLex::lex member to be the first in struct globals 
function                                             old     new   delta
zbc_program_exec                                    3967    4003     +36
zdc_program_execStr                                  501     520     +19
zbc_posix_error_fmt                                   58      62      +4
bc_vm_init                                           675     679      +4
bc_read_line                                         407     411      +4
bc_error_fmt                                          36      40      +4
zdc_parse_register                                    45      44      -1
zdc_parse_exprs_until_eof                             28      27      -1
zbc_parse_text_init                                   56      55      -1
zbc_parse_stmt_allow_NLINE_before                     55      54      -1
zbc_lex_skip_if_at_NLINE                              19      18      -1
zbc_lex_number                                       178     177      -1
bc_parse_create                                       97      96      -1
bc_lex_whitespace                                     43      42      -1
bc_lex_name                                           71      70      -1
bc_lex_lineComment                                    38      37      -1
bc_lex_assign                                         35      34      -1
zdc_parse_expr                                       476     473      -3
bc_verror_msg                                         93      90      -3
bc_lex_file                                           27      24      -3
zbc_parse_name                                       453     448      -5
bc_parse_expr_empty_ok                              1776    1764     -12
zbc_vm_process                                       878     865     -13
zbc_parse_stmt_possibly_auto                        1451    1425     -26
zbc_lex_next                                        2075    2039     -36
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/19 up/down: 71/-112)          Total: -41 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 22:20:14 +01:00
Denys Vlasenko
0b0e8d0509 bc: rename some members and macros, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 21:44:10 +01:00
Denys Vlasenko
3f8752c33f bc: shorten error messages 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 21:28:25 +01:00
Gavin Howard
fa495ce498 bc: make it clear that the code is adapted 
Signed-off-by: Gavin Howard <yzena.tech@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 20:53:15 +01:00
Denys Vlasenko
a2e62e3e50 bc: stop passing a pointer to G.prs down the call chain 
function                                             old     new   delta
rewrite_label_to_current                              19      26      +7
bc_lex_assign                                         28      35      +7
zbc_lex_skip_if_at_NLINE                              14      19      +5
bc_parse_push                                         11      16      +5
bc_parse_operator                                    147     152      +5
bc_parse_create                                       92      97      +5
bc_lex_whitespace                                     38      43      +5
bc_lex_name                                           66      71      +5
bc_lex_lineComment                                    33      38      +5
zbc_lex_number                                       174     178      +4
zbc_parse_text_init                                   53      56      +3
zdc_parse_register                                    43      45      +2
zdc_parse_exprs_until_eof                             26      28      +2
bc_parse_free                                         38      40      +2
bc_lex_file                                           28      27      -1
zbc_parse_pushSTR                                     65      63      -2
bc_parse_expr_empty_ok                              1778    1776      -2
zbc_vm_execute_FILE                                   55      52      -3
bc_vm_init                                           678     675      -3
zbc_parse_stmt_allow_NLINE_before                     59      55      -4
bc_parse_pushNUM                                      80      74      -6
bc_parse_pushJUMP_ZERO                                27      21      -6
bc_parse_pushJUMP                                     27      21      -6
bc_vm_run                                            112     104      -8
bc_parse_pushName                                     39      31      -8
bc_parse_pushIndex                                    60      52      -8
zbc_parse_name                                       468     453     -15
zdc_program_execStr                                  524     501     -23
zdc_parse_mem                                         93      70     -23
zbc_program_exec                                    4003    3967     -36
zdc_parse_expr                                       518     476     -42
zbc_vm_process                                       923     878     -45
zbc_lex_next                                        2158    2070     -88
zbc_parse_stmt_possibly_auto                        1560    1451    -109
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 14/20 up/down: 62/-438)        Total: -376 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 20:40:55 +01:00
Denys Vlasenko
1fbe35a7d8 bc: make zbc_program_read() and zdc_program_execStr() use G.prs 
function                                             old     new   delta
zbc_program_print                                    656     683     +27
zbc_program_exec                                    3976    4003     +27
zdc_program_execStr                                  512     524     +12
bc_num_printNewline                                   45      54      +9
bc_num_printHex                                       61      67      +6
bc_num_printDigits                                   131     137      +6
dc_num_printChar                                      21      24      +3
bc_vm_init                                           675     678      +3
zbc_program_assign                                   424     426      +2
bc_read_line                                         410     407      -3
bc_verror_msg                                         99      93      -6
zbc_lex_next                                        2167    2158      -9
zbc_vm_execute_FILE                                   67      55     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 9/4 up/down: 95/-30)             Total: 65 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 19:38:13 +01:00
Denys Vlasenko
53e569c06b bc: fix interactive read() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 19:37:23 +01:00
Denys Vlasenko
2638454464 bc: add code to detect errors like "print 1 print 2" 
function                                             old     new   delta
zbc_vm_process                                       831     925     +94
zbc_program_exec                                    3964    3976     +12
zdc_program_execStr                                  506     512      +6
zbc_lex_next                                        2161    2167      +6
zbc_program_assign                                   419     424      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/0 up/down: 123/0)             Total: 123 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 18:37:52 +01:00
Denys Vlasenko
5fa74b9efc bc: allow {break} and {continue} (allow RBRACE to terminate them) 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1599    1560     -39

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 17:07:51 +01:00
Denys Vlasenko
d4b721cc8b bc: shrink parsing code a bit more, disallow "auto a b c" (without commas) 
function                                             old     new   delta
bc_parse_expr_empty_ok                              1791    1785      -6
zbc_parse_stmt_possibly_auto                        1675    1599     -76
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-82)             Total: -82 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 16:39:01 +01:00
Denys Vlasenko
73b3ebc0e1 bc: simplify bc_parse_expr_empty_ok() 
function                                             old     new   delta
bc_parse_expr_empty_ok                              1810    1791     -19

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 01:43:52 +01:00
Denys Vlasenko
d0238d83f0 bc: simplify bc_parse_expr_empty_ok() 
function                                             old     new   delta
bc_parse_expr_empty_ok                              1819    1810      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 01:21:16 +01:00
Denys Vlasenko
bb116031a0 bc: simplify bc_parse_expr_empty_ok() 
function                                             old     new   delta
bc_parse_expr_empty_ok                              1846    1819     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-25 01:16:37 +01:00
Denys Vlasenko
d897c9aca6 bc: BC_RESULT_ONE is bc-specific 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 23:41:31 +01:00
Denys Vlasenko
0c45bb22a0 bc: partially deinline BC_PARSE_LEAF() macro 
function                                             old     new   delta
ok_in_expr                                             -      30     +30
bc_parse_expr_empty_ok                              1972    1846    -126
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 30/-126)           Total: -96 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 23:22:40 +01:00
Denys Vlasenko
a17d95d0d0 bc: rename lexer variables, use smallints where appropriate 
function                                             old     new   delta
bc_parse_expr_empty_ok                              1966    1972      +6
zdc_parse_expr                                       514     518      +4
zbc_lex_number                                       177     174      -3
dc_num_printChar                                      24      21      -3
bc_lex_whitespace                                     41      38      -3
bc_lex_name                                           69      66      -3
bc_lex_lineComment                                    36      33      -3
bc_lex_assign                                         31      28      -3
zbc_parse_name                                       472     468      -4
zbc_vm_process                                       836     831      -5
zdc_program_execStr                                  512     506      -6
zbc_parse_text_init                                   59      53      -6
bc_num_printNewline                                   51      45      -6
bc_num_printHex                                       67      61      -6
bc_num_printDigits                                   137     131      -6
zbc_program_assign                                   426     419      -7
zbc_parse_stmt_possibly_auto                        1682    1675      -7
zbc_program_exec                                    3977    3964     -13
zbc_program_print                                    683     656     -27
zbc_lex_next                                        2233    2161     -72
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/18 up/down: 10/-183)         Total: -173 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 22:55:54 +01:00
Denys Vlasenko
d279d809ac bc: fix "bc -s" only warning on "define f()<newline>", not exiting 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 18:28:56 +01:00
Denys Vlasenko
79587cb442 bc: POSIX error/warn functions can be 'z' functions too 
In non-interactive config, they either return 'success', or do not return.

function                                             old     new   delta
zbc_posix_error_fmt                                   41      39      -2
bc_parse_expr_empty_ok                              1751    1744      -7
zbc_parse_stmt_possibly_auto                        1322    1314      -8
------------------------------------------------------------------------------
(add/remove: 5/5 grow/shrink: 0/2 up/down: 118/-135)          Total: -17 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 18:11:41 +01:00
Denys Vlasenko
65b6fe09c4 bc: remove unnecessary NULL initializers 
function                                             old     new   delta
zbc_program_assign                                   442     426     -16
zbc_program_exec                                    4043    3977     -66
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-82)             Total: -82 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 17:21:31 +01:00
Denys Vlasenko
a5bf53e4bb bc: move relational LEXs before math LEXs - shorten dc_LEX_to_INST[] 
function                                             old     new   delta
dc_LEX_to_INST                                        48      42      -6
zdc_parse_expr                                       523     514      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-15)             Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 17:07:20 +01:00
Denys Vlasenko
4accb6bba8 bc: offset dc_LEX_to_INST[] start 
function                                             old     new   delta
zdc_parse_expr                                       516     523      +7
dc_LEX_to_INST                                        56      48      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-8)               Total: -1 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 15:29:33 +01:00
Denys Vlasenko
23ea0734e1 bc: rename BC_LEX_NLINE/WHITESPACE/STR/NAME/NUMBER to XC_LEX_ 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 15:05:49 +01:00
Denys Vlasenko
9d9c97efbd bc: separate many bc and dc LEX constants 
function                                             old     new   delta
zdc_parse_expr                                       510     516      +6
bc_parse_expr_empty_ok                              1963    1966      +3
dc_LEX_to_INST                                        83      56     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 9/-27)             Total: -18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 15:00:56 +01:00
Denys Vlasenko
69560f42da bc: rename several BC_LEX_OPs to XC_LEX_OPs. 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 14:14:23 +01:00
Denys Vlasenko
abf6cf6765 bc: move BC_LEX_OP_INC/DEC to the end of operation LEX constants 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 13:20:57 +01:00
Denys Vlasenko
7d9be0bc6d bc: rename BC_LEXs to XC_LEXs for common constants, and to DC_LEXs for dc-specific 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 12:25:20 +01:00
Denys Vlasenko
2097ac8d9e bc: move functions/macros around, no code changes 
Order now is:
enums/structures/defines,
utility/common functions,
parsing,
execution,
main loop,
main()

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 05:00:36 +01:00
Denys Vlasenko
a7732d1120 bc: rename common INST constants to XC_, dc-specific ones to DC_ 
This will assist in disentangling dc and bc LEX constants

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 04:26:07 +01:00
Denys Vlasenko
81293c8af0 dc: without -x, do not parse extended regs: 's p' means: store to ' ' reg, print 
function                                             old     new   delta
zbc_lex_next                                        2240    2233      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-7)               Total: -7 bytes
   text	   data	    bss	    dec	    hex	filename
 981437	    485	   7296	 989218	  f1822	busybox_old
 981412	    485	   7296	 989193	  f1809	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 02:01:32 +01:00
Denys Vlasenko
73b2c60825 bc: fix incorrect bit in BC_PARSE_EXPRS_BITS: 'limits' is not allowed 
Alsl, move and rename dc_lex_tokens[] to dc_char_to_LEX[]

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 01:04:21 +01:00
Denys Vlasenko
ad0bd381e9 bc: for "dc only" remove handling of LAST, move OBASE enums up to IBASE 
function                                             old     new   delta
dc_LEX_to_INST                                         -      82     +82
bc_parse_pushNUM                                       -      62     +62
zbc_program_num                                      981     978      -3
bc_result_free                                        46      43      -3
zbc_program_binOpPrep                                305     300      -5
static.msg                                            24      12     -12
zbc_program_exec                                    4013    3994     -19
zdc_parse_expr                                       583     507     -76
dc_parse_insts                                        83       -     -83
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/6 up/down: 144/-201)          Total: -57 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-24 00:50:32 +01:00
Denys Vlasenko
9471bd4660 bc: fix empty lines in dc generating "bad token" message 
function                                             old     new   delta
zdc_program_asciify                                    -     370    +370
zbc_program_pushArray                                  -     147    +147
zbc_vm_process                                       824     828      +4
zbc_program_exec                                    4182    4046    -136
zdc_program_printStream                              146       -    -146
zbc_program_read                                     268       -    -268
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/1 up/down: 521/-550)          Total: -29 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-23 00:13:15 +01:00
Denys Vlasenko
01eb5e9da1 bc: shrink modular exponentiation code 
function                                             old     new   delta
zdc_program_modexp                                   721     694     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 23:59:21 +01:00
Denys Vlasenko
1acac7f9c5 bc: do not yet allow 2^2.1 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 23:14:48 +01:00
Denys Vlasenko
a9f59db809 bc: avoid having to twiddle b->neg in zbc_num_p() 
function                                             old     new   delta
zbc_num_ulong_abs                                      -      70     +70
zbc_num_p                                            424     413     -11
zbc_num_ulong                                         81      21     -60
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 70/-71)             Total: -1 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 21:52:30 +01:00
Denys Vlasenko
2ea8ddf8c2 bc: do not disallow powers to N.0000 degree - it's even shorter code 
function                                             old     new   delta
zbc_num_p                                            440     424     -16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 21:45:18 +01:00
Denys Vlasenko
1557b76edd bc: shrink zbc_num_ulong() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 21:37:46 +01:00
Denys Vlasenko
ec74a9c145 bc: make long-running dc drop data it does not need (when it can) 
function                                             old     new   delta
zbc_vm_process                                       765     824     +59

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 19:23:46 +01:00
Denys Vlasenko
5cf0b2d466 bc: unbreak "z function" macro machinery 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 18:24:19 +01:00
Denys Vlasenko
badf683b0a dc: unbreak interactive mode - was trying to get next tokens instead of executing 
function                                             old     new   delta
zbc_program_read                                       -     268    +268
zdc_program_printStream                                -     146    +146
zbc_program_exec                                    4046    4182    +136
zdc_program_execStr                                  472     512     +40
zdc_parse_exprs_until_eof                              -      26     +26
zbc_vm_process                                       740     765     +25
zbc_lex_next                                        2225    2240     +15
zdc_parse_expr                                       569     535     -34
zbc_program_pushArray                                147       -    -147
zdc_program_asciify                                  370       -    -370
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 4/1 up/down: 656/-551)          Total: 105 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 18:10:50 +01:00
Denys Vlasenko
5daa1a0adf bc: move zbc_lex_next() out of zdc_parse_string() and zdc_parse_mem() 
function                                             old     new   delta
zdc_parse_mem                                         99      93      -6
zdc_parse_expr                                       586     569     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-23)             Total: -23 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 16:41:23 +01:00
Denys Vlasenko
7c1c9dc86b bc: shorten sanity-check code 
function                                             old     new   delta
zbc_vm_process                                       745     740      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 14:18:47 +01:00
Denys Vlasenko
88fcd5cc6c bc: fold single-callsite functions into callers, commonalize code 
function                                             old     new   delta
zbc_vm_process                                       699     745     +46
zbc_parse_stmt_possibly_auto                        1689    1682      -7
bc_parse_reset                                       113       -    -113
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/1 up/down: 46/-120)           Total: -74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 06:00:25 +01:00
Denys Vlasenko
514967df5e bc: zcommon_parse_expr() has only one user, fold it in 
function                                             old     new   delta
zbc_program_exec                                    4021    4046     +25
zdc_parse_expr                                       589     586      -3
zcommon_parse_expr                                    28       -     -28
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/1 up/down: 25/-31)             Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 03:38:52 +01:00
Denys Vlasenko
f093e3df2d bc: zcommon_parse_expr() lost its flags argument 
function                                             old     new   delta
zcommon_parse_expr                                     -      28     +28
zdc_program_execStr                                  474     472      -2
zbc_program_exec                                    4023    4021      -2
common_parse_expr                                     29       -     -29
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/2 up/down: 28/-33)             Total: -5 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 02:30:18 +01:00
Denys Vlasenko
39287e0d02 bc: stop using BC_PARSE_NOCALL in dc code 
function                                             old     new   delta
zdc_program_execStr                                  465     474      +9
zbc_vm_process                                       701     699      -2
common_parse_expr                                     32      29      -3
zdc_parse_expr                                       615     586     -29
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 9/-34)             Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 02:23:08 +01:00
Denys Vlasenko
8c1e723596 bc: unbreak read(), remove checks for nested read() 
function                                             old     new   delta
zbc_parse_pushSTR                                      -      65     +65
common_parse_expr                                      -      32     +32
bc_error_nested_read_call                             10       -     -10
bc_parse_expr_empty_ok                              1977    1963     -14
zdc_parse_expr                                       635     615     -20
zcommon_parse_expr                                    32       -     -32
zbc_program_exec                                    4064    4023     -41
bc_parse_pushSTR                                      65       -     -65
------------------------------------------------------------------------------
(add/remove: 2/3 grow/shrink: 0/3 up/down: 97/-182)           Total: -85 bytes
   text	   data	    bss	    dec	    hex	filename
 981661	    485	   7296	 989442	  f1902	busybox_old
 981540	    485	   7296	 989321	  f1889	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-22 01:34:10 +01:00
Denys Vlasenko
1dc4de9d9b bc: code shrink 
function                                             old     new   delta
bc_result_pop_and_push                                 -      73     +73
zbc_program_exec                                    4068    4064      -4
bc_program_binOpRetire                                46      32     -14
zdc_program_assignStr                                146     126     -20
zdc_program_asciify                                  395     370     -25
bc_program_retire                                     35       7     -28
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/5 up/down: 73/-91)            Total: -18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 23:13:48 +01:00
Denys Vlasenko
24e4194635 bc: rename BcInstPtr::idx and ::len 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 23:01:26 +01:00
Denys Vlasenko
8287b1c869 bc: remove unnecessary initializations 
function                                             old     new   delta
zdc_program_asciify                                  403     395      -8
zbc_program_print                                    691     683      -8
zbc_program_exec                                    4079    4068     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-27)             Total: -27 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 22:43:53 +01:00
Denys Vlasenko
e8e7bda63a bc: use non-allocated BcNum's where appropriate 
function                                             old     new   delta
zbc_num_printNum                                     540     543      +3
zdc_program_asciify                                  407     403      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 3/-4)               Total: -1 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 22:36:04 +01:00
Denys Vlasenko
6ed7fb0a87 bc: optimize bc_vec_push() usage 
function                                             old     new   delta
bc_parse_pushNUM                                      87      80      -7
zbc_parse_stmt_possibly_auto                        1697    1689      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-15)             Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 22:16:17 +01:00
Denys Vlasenko
19eee8ed7c bc: fix for() to not leave data on stack 
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1665    1697     +32
zbc_vm_process                                       672     701     +29
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 61/0)               Total: 61 bytes
   text	   data	    bss	    dec	    hex	filename
 981656	    485	   7296	 989437	  f18fd	busybox_old
 981748	    485	   7296	 989529	  f1959	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 20:29:34 +01:00
Denys Vlasenko
5d57bc442d bc: fix infinite state growth for "yes 1 | bc" case 
function                                             old     new   delta
zbc_vm_process                                       585     672     +87
bc_func_init                                          50      86     +36
zbc_program_num                                      990    1022     +32
bc_program_str                                        17      47     +30
bc_program_current_func                                -      22     +22
bc_parse_pushNUM                                      66      87     +21
bc_func_free                                          27      43     +16
zbc_num_binary                                       145     147      +2
bc_program_reset                                      64      61      -3
bc_parse_pushSTR                                      73      65      -8
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 7/2 up/down: 246/-11)           Total: 235 bytes
   text	   data	    bss	    dec	    hex	filename
 981393	    485	   7296	 989174	  f17f6	busybox_old
 981656	    485	   7296	 989437	  f18fd	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 16:22:26 +01:00
Denys Vlasenko
447dc02c27 bc: fix comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 00:39:02 +01:00
Denys Vlasenko
52caa007e3 bc: for(;;) fix from upstream 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 00:35:22 +01:00
Denys Vlasenko
047154472a bc: shrink bc_program_add_fn() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-21 00:10:26 +01:00
Denys Vlasenko
44a99ca617 bc: "dc only" config does not need G.prog.fn_map 
function                                             old     new   delta
bc_program_add_fn                                      -      43     +43
bc_vm_init                                           655     675     +20
bc_program_addFunc                                   138     118     -20
zdc_parse_expr                                       658     635     -23
zdc_program_asciify                                  447     407     -40
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/3 up/down: 63/-83)            Total: -20 bytes
   text	   data	    bss	    dec	    hex	filename
 984739	    489	   7312	 992540	  f251c	busybox_old
 984712	    489	   7312	 992513	  f2501	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-20 20:34:09 +01:00
Denys Vlasenko
5acd14ba5b bc: fix keyword matching to not think "ifz" is the "if" keyword 
function                                             old     new   delta
zbc_lex_next                                        2224    2225      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-20 16:48:50 +01:00
Denys Vlasenko
503faf9d53 bc: shrink "dc only" code by dropping unused structure members 
function                                             old     new   delta
zbc_program_num                                      979     981      +2
zbc_program_pushArray                                147     145      -2
bc_program_pushVar                                   198     196      -2
bc_program_func                                       17      15      -2
dc_num_printChar                                      24      21      -3
bc_program_retire                                     35      32      -3
bc_program_binOpRetire                                46      43      -3
zdc_program_printStream                              153     148      -5
zbc_program_prep                                      91      86      -5
zbc_program_copyToVar                                300     295      -5
zdc_program_modexp                                   721     715      -6
zbc_program_binOpPrep                                311     305      -6
bc_program_addFunc                                   138     132      -6
bc_num_printNewline                                   51      45      -6
bc_num_printHex                                       67      61      -6
bc_num_printDigits                                   137     131      -6
zdc_program_assignStr                                146     137      -9
bc_program_reset                                      64      55      -9
bc_func_free                                          27       5     -22
bc_parse_free                                         38       8     -30
bc_parse_create                                       92      47     -45
bc_func_init                                          50       5     -45
dc_main                                              691     645     -46
zdc_program_execStr                                  496     442     -54
zbc_program_print                                    677     623     -54
zbc_vm_process                                       204     137     -67
zbc_program_exec                                    4132    4057     -75
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/26 up/down: 2/-522)          Total: -520 bytes
   text	   data	    bss	    dec	    hex	filename
 969767	    485	   7296	 977548	  eea8c	busybox_old
 969210	    485	   7296	 976991	  ee85f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-20 16:24:18 +01:00
Denys Vlasenko
eaa3b00002 bc: shorten bc_program_addFunc() 
function                                             old     new   delta
bc_func_init                                           -      50     +50
bc_program_addFunc                                   201     138     -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 50/-63)            Total: -13 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 20:05:50 +01:00
Denys Vlasenko
408b7d45f6 bc: fix "dc only" and "bc only" configs 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 19:43:03 +01:00
Denys Vlasenko
fa21079183 bc: rename dc-specific functions, simplify zdc_program_execStr() a bit 
function                                             old     new   delta
zbc_program_execStr                                  496       -    -496
zdc_program_execStr                                    -     491    +491

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 19:38:51 +01:00
Denys Vlasenko
44dbe675dd bc: rename zbc_parse_string->bc_parse_pushSTR, do not emit next opcode in it 
function                                             old     new   delta
bc_parse_pushSTR                                       -      73     +73
zbc_parse_stmt_possibly_auto                        1638    1640      +2
zbc_parse_string                                      89       -     -89
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/0 up/down: 75/-89)            Total: -14 bytes
   text	   data	    bss	    dec	    hex	filename
 981377	    485	   7296	 989158	  f17e6	busybox_old
 981363	    485	   7296	 989144	  f17d8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 19:10:40 +01:00
Denys Vlasenko
ea5cad2a0d bc: avoid bc_vec_item() calls in bc_vm_run() 
function                                             old     new   delta
bc_vm_run                                            124     112     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 18:09:31 +01:00
Denys Vlasenko
eac0de55d6 bc: avoid bc_vec_item() calls in bc_array_copy() 
function                                             old     new   delta
zbc_program_copyToVar                                311     300     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 17:59:30 +01:00
Denys Vlasenko
87888ce4d8 bc: avoid successive bc_vec_item(&func->autos, i) 
function                                             old     new   delta
zbc_func_insert                                       97     100      +3
zbc_program_call                                     353     354      +1
zbc_program_exec                                    4085    4078      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 4/-7)               Total: -3 bytes
   text	   data	    bss	    dec	    hex	filename
 981403	    485	   7296	 989184	  f1800	busybox_old
 981400	    485	   7296	 989181	  f17fd	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 17:55:23 +01:00
Denys Vlasenko
f36a0adf8b bc: remove unnecessary union use 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 17:15:04 +01:00
Denys Vlasenko
dfe1dd2031 bc: "unsigned_n > 0" is shorter code than "unsigned_n >= 1" 
function                                             old     new   delta
zbc_program_print                                    680     677      -3
zbc_program_exec                                    4089    4085      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-7)               Total: -7 bytes
   text	   data	    bss	    dec	    hex	filename
 981404	    485	   7296	 989185	  f1801	busybox_old
 981397	    485	   7296	 989178	  f17fa	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 17:09:01 +01:00
Denys Vlasenko
65e1046abf bc: open-code bc_parse_updateFunc() macro 
This clearly shows one place which would need changing
for nested funcdefs to work.

function                                             old     new   delta
bc_parse_reset                                       106     110      +4
zbc_vm_process                                       586     585      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 4/-1)                Total: 3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 15:13:14 +01:00
Denys Vlasenko
684d441f5c bc: make bc_program_addFunc() return new idx, untangle &p->fidx interaction 
In:
       bc_program_addFunc(name, idx);
       p->func = bc_program_func(p->fidx);
in some cases p->fidx was updated by _first_ statement - because passed idx
was pointing at it. This was very obscure.

function                                             old     new   delta
zdc_parse_expr                                       653     658      +5
bc_program_addFunc                                   204     201      -3
zbc_vm_process                                       594     586      -8
bc_vm_init                                           663     655      -8
zbc_parse_name                                       482     472     -10
bc_parse_addFunc                                      25       -     -25
zbc_program_asciify                                  473     447     -26
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/5 up/down: 5/-80)             Total: -75 bytes
   text	   data	    bss	    dec	    hex	filename
 981482	    485	   7296	 989263	  f184f	busybox_old
 981401	    485	   7296	 989182	  f17fe	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 14:59:22 +01:00
Denys Vlasenko
085b420220 bc: "reload stack only after insts" change missed a few places 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 14:02:59 +01:00
Denys Vlasenko
5aa54830bf bc: rename a few functions 
function                                             old     new   delta
bc_map_find_ge                                         -      71     +71
bc_map_find_exact                                      -      50     +50
bc_map_index                                          50       -     -50
bc_map_find                                           71       -     -71
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 0/0 up/down: 121/-121)            Total: 0 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 13:55:53 +01:00
Denys Vlasenko
e3d3d2067d bc: remove redundant strdup+free in zbc_parse_call() 
function                                             old     new   delta
zbc_parse_name                                       527     482     -45
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-45)             Total: -45 bytes
   text	   data	    bss	    dec	    hex	filename
 981541	    485	   7296	 989322	  f188a	busybox_old
 981486	    485	   7296	 989267	  f1853	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 13:20:02 +01:00
Denys Vlasenko
4796a1d537 bc: delete G.prog.strmb for real 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 12:48:16 +01:00
Denys Vlasenko
b80d7aad1b bc: in execution loop, reload stack only after insts which can change it 
Only these functions affect G.prog.exestack:
zbc_program_read
zbc_program_call
zbc_program_return
zbc_program_nquit
zbc_program_execStr

function                                             old     new   delta
zbc_program_exec                                    3995    4093     +98
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 98/0)               Total: 98 bytes
   text	   data	    bss	    dec	    hex	filename
 981364	    485	   7296	 989145	  f17d9	busybox_old
 981462	    485	   7296	 989243	  f183b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-19 12:35:27 +01:00
Denys Vlasenko
d6e24bd795 bc: simplify bc_array_expand() 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 20:10:48 +01:00
Denys Vlasenko
30a8e0c2f9 bc: code shrink 
function                                             old     new   delta
zbc_program_print                                    684     680      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-4)               Total: -4 bytes
   text	   data	    bss	    dec	    hex	filename
 981368	    485	   7296	 989149	  f17dd	busybox_old
 981364	    485	   7296	 989145	  f17d9	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-18 19:20:04 +01:00
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