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369 Commits

Author SHA1 Message Date
Denys Vlasenko
53b2fdcdba *: add NOINLINEs where code noticeably shrinks 
function                                             old     new   delta
display                                               85    1463   +1378  -73 bytes
select_and_cluster                                     -    1088   +1088 -139 bytes
parse_reply                                            -     979    +979 -109 bytes
zbc_num_sqrt                                           -     632    +632 -191 bytes
show_bridge_port                                       -     585    +585  -56 bytes
sp_256_proj_point_add_8                                -     576    +576  -45 bytes
encode_then_append_var_plusminus                       -     554    +554 -118 bytes
read_mode_db                                           -     537    +537  -47 bytes
fbset_main                                          1331     747    -584
sp_256_ecc_mulmod_8                                 1157     536    -621
brctl_main                                          2189    1548    -641
expand_one_var                                      2544    1872    -672
zxc_vm_process                                      6412    5589    -823
send_queries                                        1813     725   -1088
recv_and_process_peer_pkt                           2245    1018   -1227
bb_dump_dump                                        1531      80   -1451
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 1/8 up/down: 6329/-7107)       Total: -778 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-10 13:50:53 +02:00
Denys Vlasenko
1f60d88cf6 *: more --help tweaks 
function                                             old     new   delta
packed_usage                                       33552   33541     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-15 10:00:18 +02:00
Denys Vlasenko
aece2c5f0f bc: tweak overflow detection in a^b 
function                                             old     new   delta
zbc_num_p                                            506     510      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-12 14:03:24 +02:00
Denys Vlasenko
e36c39a46d bc: code shrink: combine init() and copy() where we can 
function                                             old     new   delta
bc_num_init_and_copy                                   -      27     +27
zxc_program_popResultAndCopyToVar                    495     483     -12
zxc_num_printNum                                     518     506     -12
zbc_num_p                                            518     506     -12
zxc_program_assign                                   357     341     -16
zbc_num_m                                            298     267     -31
zxc_vm_process                                      6498    6412     -86
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/6 up/down: 27/-169)          Total: -142 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-12 12:35:15 +02:00
Denys Vlasenko
e5958f7dda bc: fix for mul overflow in scale calculation in a^b 
function                                             old     new   delta
zbc_num_p                                            516     518      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-12 12:19:20 +02:00
Denys Vlasenko
ba9f9c2d2c *: --help text tweaks 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-04-14 15:15:45 +02:00
Denys Vlasenko
9b6bcfda0e bc: typo fix in comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-26 21:20:18 +01:00
Denys Vlasenko
9037757c5f dc: more docs in --help 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-26 17:11:55 +01:00
Denys Vlasenko
1a37aa7a88 dc: document what non-GNU commands do 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-26 14:48:04 +01:00
Denys Vlasenko
ace81cd46c bc/dc: fix length(0) and length(0.000nnn) result 
function                                             old     new   delta
zxc_vm_process                                      6464    6498     +34

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-26 14:23:13 +01:00
Denys Vlasenko
3d88cc1d37 dc: correct --help text 
before:

    Tiny RPN calculator. Operations:
    +, -, *, /, %, ~, ^, |,
    p - print top of the stack without popping
    f - print entire stack
    k - pop the value and set the precision
    i - pop the value and set input radix
    o - pop the value and set output radix

After:

    Tiny RPN calculator. Operations:
    Arithmetic: + - * / % ^
    ~ - divide with remainder
    | - modular exponentiation
    v - square root
    p - print top of the stack without popping
    f - print entire stack
    k - pop the value and set precision
    i - pop the value and set input radix
    o - pop the value and set output radix

function                                             old     new   delta
packed_usage                                       33519   33565     +46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-26 13:32:29 +01:00
Ron Yorston
cad3fc743a libbb: introduce and use fputs_stdout 
function                                             old     new   delta
fputs_stdout                                           -      12     +12
zxc_vm_process                                      7237    7230      -7
yes_main                                              85      78      -7
write_block                                          380     373      -7
wrapf                                                305     298      -7
strings_main                                         437     430      -7
show_bridge                                          353     346      -7
rev_main                                             384     377      -7
put_prompt_custom                                     58      51      -7
put_cur_glyph_and_inc_cursor                         168     161      -7
print_numbered_lines                                 152     145      -7
print_named_ascii                                    130     123      -7
print_name                                           135     128      -7
print_login_issue                                    386     379      -7
print_ascii                                          208     201      -7
powertop_main                                       1249    1242      -7
od_main                                             1789    1782      -7
logread_main                                         518     511      -7
head_main                                            804     797      -7
display_process_list                                1319    1312      -7
cut_main                                            1002     995      -7
bb_dump_dump                                        1550    1543      -7
bb_ask_noecho                                        393     386      -7
baseNUM_main                                         702     695      -7
expand_main                                          755     745     -10
dumpleases_main                                      497     487     -10
write1                                                12       -     -12
putcsi                                                37      23     -14
print_login_prompt                                    55      41     -14
paste_main                                           525     511     -14
cat_main                                             440     426     -14
print_it                                             245     230     -15
print_addrinfo                                      1188    1171     -17
print_rule                                           770     750     -20
print_linkinfo                                       842     822     -20
httpd_main                                           791     771     -20
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/34 up/down: 12/-341)         Total: -329 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-03 20:52:40 +01:00
Denys Vlasenko
cc4303f5e6 bc: code shrink 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-06 14:00:53 +01:00
Denys Vlasenko
0197fbffb7 bc: ^C on input line exits (unlike ^C during calculations, which does not) 
function                                             old     new   delta
xc_read_line                                         353     344      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-04 14:41:20 +01:00
Denys Vlasenko
29a9043b36 bc,dc: make BC_LINE_LENGTH/DC_LINE_LENGTH more compatible with GNU 
function                                             old     new   delta
xc_vm_init                                           640     682     +42

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-29 18:52:19 +01:00
Denys Vlasenko
40f9fe2160 bc: placate gcc (it thinks 's' can be uninitialized here) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-29 17:02:06 +01:00
Denys Vlasenko
00eb23b47a bc: do not allocate line editing state until needed 
function                                             old     new   delta
xc_read_line                                         324     353     +29
free_line_input_t                                     34      39      +5
xc_vm_init                                           656     640     -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 34/-16)             Total: 18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-21 21:36:58 +01:00
Denys Vlasenko
6cc4962b60 decrease padding: gcc-9.3.1 slaps 32-byte alignment on arrays willy-nilly 
text	   data	    bss	    dec	    hex	filename
1021236	    559	   5052	1026847	  fab1f	busybox_old
1021120	    559	   5052	1026731	  faaab	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-11-30 14:58:02 +01:00
Denys Vlasenko
5663a17dab bc: placate a "defined but not used" warning 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-06-24 15:05:29 +02:00
Denys Vlasenko
008413754b bc: fix comparison bug, closes 12336 
function                                             old     new   delta
bc_num_cmp                                           249     259     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-11-23 17:25:21 +01:00
Kang-Che Sung
f159352112 bc: Add 'U' suffix in UINT_MAX preprocessor check 
Without the 'U' unsigned suffix, gcc will throw a "integer constant is
so large that it is unsigned" warning.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-09-12 12:23:46 +02:00
Brian Foley
10509a70ee dc: Parse error & fix out of bounds read in xc_program_printString 
function                                             old     new   delta
xc_program_print                                     712     735     +23

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-09-05 10:53:21 +02:00
Brian Foley
b64470be17 dc: Fix segfault when executing strings generated using asciify 
function                                             old     new   delta
zxc_vm_process                                      6884    6891      +7

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-09-05 10:50:13 +02:00
Brian Foley
7454879a1d dc: execute shouldn't pop if stack head is not a string 
This matches the behaviour of both GNU dc (as specified in
its man page), and BSD dc (where stack_popstring() pops
only if the head is a string.)

Add a couple of tests to verify this behavior.

function                                             old     new   delta
zxc_vm_process                                      6882    6884      +2

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-09-05 10:46:22 +02:00
James Byrne
6937487be7 libbb: reduce the overhead of single parameter bb_error_msg() calls 
Back in 2007, commit 0c97c9d437 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().

This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.

Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.

This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.

The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):

Arm:     -92 bytes
MIPS:    -52 bytes
PPC:   -1836 bytes
x86_64: -938 bytes

Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.

Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-07-02 11:35:03 +02:00
Denys Vlasenko
7a4e55422a bc: placate compiler warnings 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-06-08 12:39:30 +02:00
Denys Vlasenko
53799506ac 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>
 2019-01-25 16:22:15 +01:00
Denys Vlasenko
cfc2546ea4 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>
 2019-01-09 11:17:19 +01:00
Denys Vlasenko
a1698a15dc 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>
 2019-01-08 19:32:38 +01:00
Denys Vlasenko
132d7c098b 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>
 2019-01-08 19:29:35 +01:00
Denys Vlasenko
fc7aa7a296 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>
 2019-01-08 18:10:00 +01:00
Denys Vlasenko
edca770d11 sleep: support "inf" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-07 15:20:56 +01:00
Denys Vlasenko
e05ec6ed3e 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>
 2019-01-04 16:26:19 +01:00
Denys Vlasenko
f11b5b9864 bc: formatting changes, added a FIXME comment, no logic changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-04 15:54:40 +01:00
Denys Vlasenko
54f5c1d600 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>
 2019-01-04 13:58:46 +01:00
Denys Vlasenko
1db367a8e6 dc: fit returning of string 
function                                             old     new   delta
zxc_program_exec                                    4087    4098     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-04 06:18:00 +01:00
Denys Vlasenko
6842c6062a 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>
 2019-01-04 05:41:47 +01:00
Denys Vlasenko
377cc97b19 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>
 2019-01-04 00:35:31 +01:00
Denys Vlasenko
02c3d7a1c9 bc: add a palceholder comment for "void" return 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-04 00:21:29 +01:00
Denys Vlasenko
19c3eb0b04 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>
 2019-01-04 00:05:07 +01:00
Denys Vlasenko
96b5ec10fb 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>
 2019-01-03 23:34:36 +01:00
Denys Vlasenko
ae6c44ea15 bc: make error line number also size_t, like everything else 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-02 16:30:24 +01:00
Denys Vlasenko
266bec8ba7 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>
 2019-01-02 05:03:53 +01:00
Denys Vlasenko
2231468a2f 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>
 2019-01-01 21:50:14 +01:00
Denys Vlasenko
51b510a480 bc: in xc_read_line(), check ^C on NUL input bytes too 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-01 02:19:02 +01:00
Denys Vlasenko
8797adc1c6 bc: remove superfluous assigment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-31 19:50:06 +01:00
Denys Vlasenko
680ccd3573 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>
 2018-12-31 19:42:13 +01:00
Denys Vlasenko
2747f6195b 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>
 2018-12-31 18:48:59 +01:00
Denys Vlasenko
2cd8c04632 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>
 2018-12-30 15:56:36 +01:00
Denys Vlasenko
8ab209f00e 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>
 2018-12-29 16:23:34 +01:00