oweals/busybox.git
5 years agochcon: Fix typo in ACTION_RECURSE
Rostislav Skudnov [Wed, 6 Feb 2019 11:57:29 +0000 (11:57 +0000)]
chcon: Fix typo in ACTION_RECURSE

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agolineedit: fix SEGV in isk, hexedit, ed, closes 11661
Denys Vlasenko [Mon, 4 Feb 2019 15:16:30 +0000 (16:16 +0100)]
lineedit: fix SEGV in isk, hexedit, ed, closes 11661

fdisk, hexedit and ed calls read_line_edit in libbb/lineedit.c with NULL
as first argument. On line 2373 of lineedit.c of busybox version 1.29.3,
state->hist_file is referenced without checking the state->flag.

This causes segmentation fault on fdisk, hexedit and ed on ARM Cortex-A9.
It somehow works on x86_64.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agogrep: fix -x -v with certain pattern orders
Ari Sundholm [Tue, 29 Jan 2019 13:42:57 +0000 (14:42 +0100)]
grep: fix -x -v with certain pattern orders

We found out that busybox -x -v is a bit broken:

ari@ari-thinkpad:~/busybox$ echo '  aa bb cc' | ./busybox grep -x -e 'aa.*' -e '.*bb.*'
  aa bb cc
ari@ari-thinkpad:~/busybox$ echo '  aa bb cc' | ./busybox grep -x -v -e 'aa.*' -e '.*bb.*'
ari@ari-thinkpad:~/busybox$ echo '  aa bb cc' | ./busybox grep -x -e '.*aa.*' -e 'bb.*'
  aa bb cc
ari@ari-thinkpad:~/busybox$ echo '  aa bb cc' | ./busybox grep -x -v -e '.*aa.*' -e 'bb.*'
  aa bb cc

Last one is wrong.

This patch fixes the issue by making sure that the variable 'found'
never makes a transition from 1 to 0, as this would mean that
grep previously found a match on this input line.

Signed-off-by: Ari Sundholm <ari@tuxera.com>
Signed-off-by: Niko Vähäsarja <niko@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: implement pass-by-reference code from upstream
Denys Vlasenko [Fri, 25 Jan 2019 13:24:03 +0000 (14:24 +0100)]
bc: implement pass-by-reference code from upstream

function                                             old     new   delta
zxc_program_popResultAndCopyToVar                    298     493    +195
bc_vec_pushIndex                                       -      75     +75
zxc_vm_process                                       859     928     +69
xc_program_dereference                                 -      66     +66
bc_vec_npush                                           -      65     +65
zbc_num_s                                            239     249     +10
zxc_program_num                                     1024    1032      +8
zbc_num_divmod                                       150     156      +6
xc_program_search                                    143     146      +3
zxc_program_assign                                   392     389      -3
zdc_program_execStr                                  520     517      -3
xc_program_pushVar                                   198     195      -3
zxc_program_exec                                    4101    4092      -9
zbc_program_call                                     318     308     -10
zbc_func_insert                                      120     104     -16
zbc_parse_stmt_possibly_auto                        1460    1439     -21
bc_vec_push                                           53      12     -41
xc_parse_pushIndex                                    61      18     -43
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 6/9 up/down: 497/-149)          Total: 348 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoip link: Fix vlan proto, closes 8261 and 11638
Bernhard Reutner-Fischer [Tue, 22 Jan 2019 10:11:15 +0000 (11:11 +0100)]
ip link: Fix vlan proto, closes 8261 and 11638

The proto has to be passed in network byte-order.
While at it allow for
 ip link add link eth0 name eth0.2.24 type vlan proto 802.1ad id 24
 ip link del link eth0 name eth0.2.24 type vlan proto 802.1ad id 24
The del was lacking a dev_str and thus errored out. Fix by using
name/dev counterpart as fallback.

The proto identifier 802.1Q was not recognized, just it's lowercase
variant, fix that too.

function                                             old     new   delta
do_add_or_delete                                    1275    1376    +101
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 101/0)             Total: 101 bytes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
5 years agoip link: fix mismatched enums in vlan_parse_opt(), closes 11631
Denys Vlasenko [Tue, 22 Jan 2019 09:07:50 +0000 (10:07 +0100)]
ip link: fix mismatched enums in vlan_parse_opt(), closes 11631

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agosed: Fix backslash parsing for 'w' command arg
Brian Foley [Wed, 2 Jan 2019 21:09:45 +0000 (13:09 -0800)]
sed: Fix backslash parsing for 'w' command arg

If there's any whitespace between w and the filename, parse_file_cmd
writes to the wrong offset when trying to fix up backslashes.

This can be seen in the asan build with busybox sed -e 'w 0\\'

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agocapability: fix string comparison in cap_name_to_number
Mark Marshall [Fri, 18 Jan 2019 08:10:34 +0000 (09:10 +0100)]
capability: fix string comparison in cap_name_to_number

The result of strcasecmp was being used incorrectly.  This function
returns 0 if the strings match.

Signed-off-by: Mark Marshall <mark.marshall@omicronenergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: code shrink
Denys Vlasenko [Wed, 9 Jan 2019 10:17:19 +0000 (11:17 +0100)]
bc: code shrink

function                                             old     new   delta
xc_parse_pushInst_and_Index                            -      16     +16
zbc_parse_expr                                      1818    1816      -2
xc_parse_pushIndex                                    65      61      -4
zbc_parse_pushSTR                                     63      58      -5
zbc_parse_name                                       448     442      -6
xc_parse_pushNUM                                      74      67      -7
zdc_parse_expr                                       479     470      -9
bc_parse_pushJUMP_ZERO                                21      12      -9
bc_parse_pushJUMP                                     21      12      -9
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/8 up/down: 16/-51)            Total: -35 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: remove "empty expression" check/message, parsing fails in these cases anyway
Denys Vlasenko [Tue, 8 Jan 2019 18:32:38 +0000 (19:32 +0100)]
bc: remove "empty expression" check/message, parsing fails in these cases anyway

function                                             old     new   delta
zbc_parse_expr                                      1848    1818     -30

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: zbc_parse_expr_empty_ok() is unused except by zbc_parse_expr(), fold it in
Denys Vlasenko [Tue, 8 Jan 2019 18:29:35 +0000 (19:29 +0100)]
bc: zbc_parse_expr_empty_ok() is unused except by zbc_parse_expr(), fold it in

function                                             old     new   delta
zbc_parse_expr                                      1865    1848     -17

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: disallow invalid syntax like "{ print 1 print 2 }"
Denys Vlasenko [Tue, 8 Jan 2019 17:08:48 +0000 (18:08 +0100)]
bc: disallow invalid syntax like "{ print 1 print 2 }"

statement parsing must NOT eat the terminator: caller needs to know
what it was, to correctly decide whether it is a valid one.

function                                             old     new   delta
zxc_program_read                                       -     234    +234
zdc_program_printStream                                -     144    +144
zbc_parse_stmt_possibly_auto                        1413    1460     +47
zxc_vm_process                                       869     859     -10
zxc_program_exec                                    4116    4101     -15
zdc_program_asciify                                  368       -    -368
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/2 up/down: 425/-393)           Total: 32 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agols: make -i compatible with coreutils: don't follow symlink by default
Martijn Dekker [Fri, 4 Jan 2019 17:54:52 +0000 (18:54 +0100)]
ls: make -i compatible with coreutils: don't follow symlink by default

Signed-off-by: Martijn Dekker <martijn@inlv.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: shorten "limits" output
Denys Vlasenko [Fri, 4 Jan 2019 15:26:19 +0000 (16:26 +0100)]
bc: shorten "limits" output

   text    data     bss     dec     hex filename
 979016     485    7296  986797   f0ead busybox_old
 978959     485    7296  986740   f0e74 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: formatting changes, added a FIXME comment, no logic changes
Denys Vlasenko [Fri, 4 Jan 2019 14:54:40 +0000 (15:54 +0100)]
bc: formatting changes, added a FIXME comment, no logic changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: support void functions (GNU compat)
Denys Vlasenko [Fri, 4 Jan 2019 12:58:46 +0000 (13:58 +0100)]
bc: support void functions (GNU compat)

function                                             old     new   delta
xc_program_print                                       -     689    +689
zxc_vm_process                                       814     869     +55
zxc_program_exec                                    4098    4116     +18
zxc_program_assign                                   385     392      +7
bc_result_free                                        43      46      +3
zxc_program_binOpPrep                                243     245      +2
zdc_program_execStr                                  518     520      +2
zxc_program_print                                    683       -    -683
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 6/0 up/down: 776/-683)           Total: 93 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agodc: fit returning of string
Denys Vlasenko [Fri, 4 Jan 2019 05:18:00 +0000 (06:18 +0100)]
dc: fit returning of string

function                                             old     new   delta
zxc_program_exec                                    4087    4098     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agodc: fix '?'
Denys Vlasenko [Fri, 4 Jan 2019 04:41:47 +0000 (05:41 +0100)]
dc: fix '?'

function                                             old     new   delta
zdc_parse_expr                                       470     479      +9
zxc_vm_process                                       839     814     -25
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 9/-25)             Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: eliminate struct BcInstPtr::results_len_before_call, it is redundant
Denys Vlasenko [Thu, 3 Jan 2019 23:34:52 +0000 (00:34 +0100)]
bc: eliminate struct BcInstPtr::results_len_before_call, it is redundant

function                                             old     new   delta
zbc_program_call                                     332     318     -14
zxc_program_exec                                    4147    4087     -60
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-74)             Total: -74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: add a palceholder comment for "void" return
Denys Vlasenko [Thu, 3 Jan 2019 23:21:29 +0000 (00:21 +0100)]
bc: add a palceholder comment for "void" return

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: remove extra div/0 test, remove test for string function parameter
Denys Vlasenko [Thu, 3 Jan 2019 23:05:07 +0000 (00:05 +0100)]
bc: remove extra div/0 test, remove test for string function parameter

function                                             old     new   delta
zbc_program_call                                     354     332     -22
zxc_program_assign                                   426     385     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-63)             Total: -63 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: fix "...; return}" to work, disallow "return ()"
Denys Vlasenko [Thu, 3 Jan 2019 22:34:36 +0000 (23:34 +0100)]
bc: fix "...; return}" to work, disallow "return ()"

function                                             old     new   delta
zbc_parse_expr                                        24    1865   +1841
zbc_parse_stmt_possibly_auto                        1425    1413     -12
bc_parse_expr_empty_ok                              1843       -   -1843
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/1 up/down: 1841/-1855)        Total: -14 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: make error line number also size_t, like everything else
Denys Vlasenko [Wed, 2 Jan 2019 15:30:24 +0000 (16:30 +0100)]
bc: make error line number also size_t, like everything else

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: generate large bc tests on the fly, -5 mbytes in the git tree
Denys Vlasenko [Wed, 2 Jan 2019 13:00:20 +0000 (14:00 +0100)]
bc: generate large bc tests on the fly, -5 mbytes in the git tree

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: speed up string printing, fix print ""
Denys Vlasenko [Wed, 2 Jan 2019 04:03:53 +0000 (05:03 +0100)]
bc: speed up string printing, fix print ""

function                                             old     new   delta
static.esc                                             -       9      +9
zxc_program_print                                    681     683      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 11/0)               Total: 11 bytes
   text    data     bss     dec     hex filename
 979144     485    7296  986925   f0f2d busybox_old
 979062     485    7296  986843   f0edb busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: upstream fixes
Denys Vlasenko [Tue, 1 Jan 2019 20:50:14 +0000 (21:50 +0100)]
bc: upstream fixes

function                                             old     new   delta
bc_parse_expr_empty_ok                              1764    1843     +79
bc_error_at                                            -      62     +62
bc_parse_inst_isLeaf                                   -      30     +30
zbc_func_insert                                      100     120     +20
bc_error_bad_function_definition                       -      10     +10
bc_error_bad_assignment                                -      10     +10
zxc_lex_next                                        1608    1614      +6
ok_in_expr                                            30       -     -30
zxc_vm_process                                       874     839     -35
------------------------------------------------------------------------------
(add/remove: 4/1 grow/shrink: 3/1 up/down: 217/-65)           Total: 152 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: in xc_read_line(), check ^C on NUL input bytes too
Denys Vlasenko [Tue, 1 Jan 2019 01:19:02 +0000 (02:19 +0100)]
bc: in xc_read_line(), check ^C on NUL input bytes too

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: remove superfluous assigment
Denys Vlasenko [Mon, 31 Dec 2018 18:50:06 +0000 (19:50 +0100)]
bc: remove superfluous assigment

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: support ibase up to 36 (GNU compat)
Denys Vlasenko [Mon, 31 Dec 2018 18:42:13 +0000 (19:42 +0100)]
bc: support ibase up to 36 (GNU compat)

function                                             old     new   delta
zxc_program_num                                      995    1018     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: fold xc_lex_more_input() into peek_inbuf()
Denys Vlasenko [Mon, 31 Dec 2018 17:48:10 +0000 (18:48 +0100)]
bc: fold xc_lex_more_input() into peek_inbuf()

function                                             old     new   delta
peek_inbuf                                            69      56     -13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoBump version to 1.30.0 1_30_0
Denys Vlasenko [Sun, 30 Dec 2018 15:15:57 +0000 (16:15 +0100)]
Bump version to 1.30.0

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: tidying up, no logic changes
Denys Vlasenko [Sun, 30 Dec 2018 14:56:36 +0000 (15:56 +0100)]
bc: tidying up, no logic changes

function                                             old     new   delta
bc_ops_prec_and_assoc                                  -      25     +25
xc_vm_init                                           665     663      -2
bc_parse_ops                                          25       -     -25
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/1 up/down: 25/-27)             Total: -2 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: simplify representation of 0.5 in sqrt()
Denys Vlasenko [Sat, 29 Dec 2018 15:23:34 +0000 (16:23 +0100)]
bc: simplify representation of 0.5 in sqrt()

function                                             old     new   delta
zxc_program_exec                                    4012    4149    +137
zdc_program_printStream                              144       -    -144
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 137/-144)           Total: -7 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: remove special-cased assignment to ibase, it works correctly with general rules
Denys Vlasenko [Sat, 29 Dec 2018 13:52:30 +0000 (14:52 +0100)]
bc: remove special-cased assignment to ibase, it works correctly with general rules

function                                             old     new   delta
zxc_program_print                                    683     681      -2
zxc_program_prep                                      91      89      -2
zxc_program_copyToVar                                300     298      -2
zdc_program_printStream                              146     144      -2
zdc_program_execStr                                  520     518      -2
zdc_program_asciify                                  370     368      -2
zxc_program_exec                                    4016    4012      -4
zdc_program_modexp                                   694     688      -6
zxc_program_num                                     1020     995     -25
zxc_program_binOpPrep                                306     243     -63
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/10 up/down: 0/-110)          Total: -110 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: more fixes for unusual input bases
Denys Vlasenko [Sat, 29 Dec 2018 01:40:03 +0000 (02:40 +0100)]
bc: more fixes for unusual input bases

function                                             old     new   delta
zxc_program_num                                      990    1020     +30
zxc_lex_number                                       172     202     +30
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 60/0)               Total: 60 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: fix handling of "digits" above 9
Denys Vlasenko [Sat, 29 Dec 2018 01:24:19 +0000 (02:24 +0100)]
bc: fix handling of "digits" above 9

function                                             old     new   delta
zxc_lex_next                                        1573    1608     +35
xc_parse_pushIndex                                    58      56      -2
xc_program_index                                      71      63      -8
zxc_program_num                                     1022     990     -32
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 35/-42)             Total: -7 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoconfig: dpkg_deb should be dpkg-deb
Denys Vlasenko [Fri, 28 Dec 2018 17:24:45 +0000 (18:24 +0100)]
config: dpkg_deb should be dpkg-deb

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoconfig: more tweaks
Denys Vlasenko [Fri, 28 Dec 2018 16:45:35 +0000 (17:45 +0100)]
config: more tweaks

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: bc enables FEATURE_DC_BIG, for correct dc testsuite operation
Denys Vlasenko [Fri, 28 Dec 2018 14:13:23 +0000 (15:13 +0100)]
bc: bc enables FEATURE_DC_BIG, for correct dc testsuite operation

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoconfig: add size information for three more applets
Denys Vlasenko [Fri, 28 Dec 2018 12:37:44 +0000 (13:37 +0100)]
config: add size information for three more applets

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: rename config options
Denys Vlasenko [Thu, 27 Dec 2018 21:52:13 +0000 (22:52 +0100)]
bc: rename config options

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoconfig: add size information for udhcpc
Denys Vlasenko [Fri, 28 Dec 2018 12:03:48 +0000 (13:03 +0100)]
config: add size information for udhcpc

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agoconfig: update size information
Denys Vlasenko [Fri, 28 Dec 2018 02:20:17 +0000 (03:20 +0100)]
config: update size information

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: rename functions common to bc and dc as xc_FOO()
Denys Vlasenko [Thu, 27 Dec 2018 17:23:58 +0000 (18:23 +0100)]
bc: rename functions common to bc and dc as xc_FOO()

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: G.prog.zero does not need initializing num[] vector
Denys Vlasenko [Thu, 27 Dec 2018 17:08:30 +0000 (18:08 +0100)]
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>
5 years agorandomconfig fixes
Denys Vlasenko [Thu, 27 Dec 2018 17:03:20 +0000 (18:03 +0100)]
randomconfig fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: use ALIGN1 where appropriate
Denys Vlasenko [Wed, 26 Dec 2018 20:17:12 +0000 (21:17 +0100)]
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>
5 years agobc: undo debugging change, add a small optimization
Denys Vlasenko [Wed, 26 Dec 2018 20:01:41 +0000 (21:01 +0100)]
bc: undo debugging change, add a small optimization

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: simple speedups
Denys Vlasenko [Wed, 26 Dec 2018 19:30:47 +0000 (20:30 +0100)]
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>
5 years agobc: use '\0' insteads of 0xff (BC_PARSE_STREND) as name terminator
Denys Vlasenko [Wed, 26 Dec 2018 19:02:09 +0000 (20:02 +0100)]
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>
5 years agobc: reduce indentation, no code changes
Denys Vlasenko [Wed, 26 Dec 2018 18:24:15 +0000 (19:24 +0100)]
bc: reduce indentation, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: fix "bc only" build
Denys Vlasenko [Wed, 26 Dec 2018 18:09:23 +0000 (19:09 +0100)]
bc: fix "bc only" build

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: fix "dc only" build
Denys Vlasenko [Wed, 26 Dec 2018 18:06:05 +0000 (19:06 +0100)]
bc: fix "dc only" build

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: comment out code which appears to be never reached
Denys Vlasenko [Wed, 26 Dec 2018 17:59:42 +0000 (18:59 +0100)]
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>
5 years agobc: remove all logic for multi-line buffering
Denys Vlasenko [Wed, 26 Dec 2018 17:46:03 +0000 (18:46 +0100)]
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>
5 years agobc: prepare for char-by-char input handling
Denys Vlasenko [Wed, 26 Dec 2018 17:32:43 +0000 (18:32 +0100)]
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>
5 years agobc: fix handling of comment/string interactions while buffering input
Denys Vlasenko [Wed, 26 Dec 2018 11:23:05 +0000 (12:23 +0100)]
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>
5 years agobc: fix interactive handling of comments in strings and quotes in comments
Denys Vlasenko [Tue, 25 Dec 2018 22:45:57 +0000 (23:45 +0100)]
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>
5 years agobc: simplify input pointer manipulation while lexing
Denys Vlasenko [Tue, 25 Dec 2018 22:15:59 +0000 (23:15 +0100)]
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>
5 years agobc: fold struct BcLex into BcParse
Denys Vlasenko [Tue, 25 Dec 2018 21:32:41 +0000 (22:32 +0100)]
bc: fold struct BcLex into BcParse

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: move BcLex::lex member to be the first in struct globals
Denys Vlasenko [Tue, 25 Dec 2018 21:20:14 +0000 (22:20 +0100)]
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>
5 years agobc: rename some members and macros, no code changes
Denys Vlasenko [Tue, 25 Dec 2018 20:44:10 +0000 (21:44 +0100)]
bc: rename some members and macros, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: shorten error messages
Denys Vlasenko [Tue, 25 Dec 2018 20:28:25 +0000 (21:28 +0100)]
bc: shorten error messages

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: make it clear that the code is adapted
Gavin Howard [Tue, 18 Dec 2018 17:03:14 +0000 (10:03 -0700)]
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>
5 years agodc: add two tests
Denys Vlasenko [Tue, 25 Dec 2018 19:50:41 +0000 (20:50 +0100)]
dc: add two tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: stop passing a pointer to G.prs down the call chain
Denys Vlasenko [Tue, 25 Dec 2018 19:40:55 +0000 (20:40 +0100)]
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>
5 years agobc: make zbc_program_read() and zdc_program_execStr() use G.prs
Denys Vlasenko [Tue, 25 Dec 2018 18:38:13 +0000 (19:38 +0100)]
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>
5 years agobc: fix interactive read()
Denys Vlasenko [Tue, 25 Dec 2018 18:37:23 +0000 (19:37 +0100)]
bc: fix interactive read()

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: add code to detect errors like "print 1 print 2"
Denys Vlasenko [Tue, 25 Dec 2018 17:37:52 +0000 (18:37 +0100)]
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>
5 years agobc: allow {break} and {continue} (allow RBRACE to terminate them)
Denys Vlasenko [Tue, 25 Dec 2018 16:07:51 +0000 (17:07 +0100)]
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>
5 years agobc: shrink parsing code a bit more, disallow "auto a b c" (without commas)
Denys Vlasenko [Tue, 25 Dec 2018 15:39:01 +0000 (16:39 +0100)]
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>
5 years agobc: simplify bc_parse_expr_empty_ok()
Denys Vlasenko [Tue, 25 Dec 2018 00:43:52 +0000 (01:43 +0100)]
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>
5 years agobc: simplify bc_parse_expr_empty_ok()
Denys Vlasenko [Tue, 25 Dec 2018 00:21:16 +0000 (01:21 +0100)]
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>
5 years agobc: simplify bc_parse_expr_empty_ok()
Denys Vlasenko [Tue, 25 Dec 2018 00:16:37 +0000 (01:16 +0100)]
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>
5 years agobc: BC_RESULT_ONE is bc-specific
Denys Vlasenko [Mon, 24 Dec 2018 22:41:31 +0000 (23:41 +0100)]
bc: BC_RESULT_ONE is bc-specific

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: partially deinline BC_PARSE_LEAF() macro
Denys Vlasenko [Mon, 24 Dec 2018 22:22:40 +0000 (23:22 +0100)]
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>
5 years agobc: rename lexer variables, use smallints where appropriate
Denys Vlasenko [Mon, 24 Dec 2018 21:55:54 +0000 (22:55 +0100)]
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>
5 years agobc: fix "bc -s" only warning on "define f()<newline>", not exiting
Denys Vlasenko [Mon, 24 Dec 2018 17:28:56 +0000 (18:28 +0100)]
bc: fix "bc -s" only warning on "define f()<newline>", not exiting

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: POSIX error/warn functions can be 'z' functions too
Denys Vlasenko [Mon, 24 Dec 2018 17:11:41 +0000 (18:11 +0100)]
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>
5 years agobc: remove unnecessary NULL initializers
Denys Vlasenko [Mon, 24 Dec 2018 16:15:34 +0000 (17:15 +0100)]
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>
5 years agobc: move relational LEXs before math LEXs - shorten dc_LEX_to_INST[]
Denys Vlasenko [Mon, 24 Dec 2018 16:06:37 +0000 (17:06 +0100)]
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>
5 years agobc: offset dc_LEX_to_INST[] start
Denys Vlasenko [Mon, 24 Dec 2018 14:29:08 +0000 (15:29 +0100)]
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>
5 years agobc: rename BC_LEX_NLINE/WHITESPACE/STR/NAME/NUMBER to XC_LEX_
Denys Vlasenko [Mon, 24 Dec 2018 14:05:49 +0000 (15:05 +0100)]
bc: rename  BC_LEX_NLINE/WHITESPACE/STR/NAME/NUMBER to XC_LEX_

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: separate many bc and dc LEX constants
Denys Vlasenko [Mon, 24 Dec 2018 14:00:56 +0000 (15:00 +0100)]
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>
5 years agobc: rename several BC_LEX_OPs to XC_LEX_OPs.
Denys Vlasenko [Mon, 24 Dec 2018 13:14:23 +0000 (14:14 +0100)]
bc: rename several BC_LEX_OPs to XC_LEX_OPs.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: move BC_LEX_OP_INC/DEC to the end of operation LEX constants
Denys Vlasenko [Mon, 24 Dec 2018 12:20:57 +0000 (13:20 +0100)]
bc: move BC_LEX_OP_INC/DEC to the end of operation LEX constants

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: rename BC_LEXs to XC_LEXs for common constants, and to DC_LEXs for dc-specific
Denys Vlasenko [Mon, 24 Dec 2018 11:25:20 +0000 (12:25 +0100)]
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>
5 years agobc: move functions/macros around, no code changes
Denys Vlasenko [Mon, 24 Dec 2018 04:00:36 +0000 (05:00 +0100)]
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>
5 years agobc: rename common INST constants to XC_, dc-specific ones to DC_
Denys Vlasenko [Mon, 24 Dec 2018 03:26:07 +0000 (04:26 +0100)]
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>
5 years agodc: without -x, do not parse extended regs: 's p' means: store to ' ' reg, print
Denys Vlasenko [Mon, 24 Dec 2018 00:53:55 +0000 (01:53 +0100)]
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>
5 years agobc: fix incorrect bit in BC_PARSE_EXPRS_BITS: 'limits' is not allowed
Denys Vlasenko [Mon, 24 Dec 2018 00:02:59 +0000 (01:02 +0100)]
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>
5 years agobc: for "dc only" remove handling of LAST, move OBASE enums up to IBASE
Denys Vlasenko [Sun, 23 Dec 2018 23:50:32 +0000 (00:50 +0100)]
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>
5 years agobc: fix empty lines in dc generating "bad token" message
Denys Vlasenko [Sat, 22 Dec 2018 23:13:15 +0000 (00:13 +0100)]
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>
5 years agobc: shrink modular exponentiation code
Denys Vlasenko [Sat, 22 Dec 2018 22:59:21 +0000 (23:59 +0100)]
bc: shrink modular exponentiation code

function                                             old     new   delta
zdc_program_modexp                                   721     694     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: do not yet allow 2^2.1
Denys Vlasenko [Sat, 22 Dec 2018 22:14:48 +0000 (23:14 +0100)]
bc: do not yet allow 2^2.1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: avoid having to twiddle b->neg in zbc_num_p()
Denys Vlasenko [Sat, 22 Dec 2018 20:52:30 +0000 (21:52 +0100)]
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>
5 years agobc: do not disallow powers to N.0000 degree - it's even shorter code
Denys Vlasenko [Sat, 22 Dec 2018 20:45:18 +0000 (21:45 +0100)]
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>
5 years agobc: shrink zbc_num_ulong()
Denys Vlasenko [Sat, 22 Dec 2018 20:37:46 +0000 (21:37 +0100)]
bc: shrink zbc_num_ulong()

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
5 years agobc: make long-running dc drop data it does not need (when it can)
Denys Vlasenko [Sat, 22 Dec 2018 18:23:46 +0000 (19:23 +0100)]
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>
5 years agobc: unbreak "z function" macro machinery
Denys Vlasenko [Sat, 22 Dec 2018 17:24:19 +0000 (18:24 +0100)]
bc: unbreak "z function" macro machinery

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>