busybox.git/miscutils/bc.c, branch 1_30_stable

bc: implement pass-by-reference code from upstream

2019-02-14T13:40:57+00:00

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

bc: code shrink

2019-02-14T13:40:57+00:00

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

bc: remove "empty expression" check/message, parsing fails in these cases anyway

2019-02-14T13:40:57+00:00

function                                             old     new   delta
zbc_parse_expr                                      1848    1818     -30

Signed-off-by: Denys Vlasenko

bc: zbc_parse_expr_empty_ok() is unused except by zbc_parse_expr(), fold it in

2019-02-14T13:40:57+00:00

function                                             old     new   delta
zbc_parse_expr                                      1865    1848     -17

Signed-off-by: Denys Vlasenko

bc: disallow invalid syntax like "{ print 1 print 2 }"

2019-02-14T13:40:57+00:00

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

bc: shorten "limits" output

2019-02-14T13:40:57+00:00

   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

bc: formatting changes, added a FIXME comment, no logic changes

2019-02-14T13:40:57+00:00

Signed-off-by: Denys Vlasenko

bc: support void functions (GNU compat)

2019-02-14T13:40:57+00:00

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

dc: fit returning of string

2019-02-14T13:40:57+00:00

function                                             old     new   delta
zxc_program_exec                                    4087    4098     +11

Signed-off-by: Denys Vlasenko

dc: fix '?'

2019-02-14T13:40:57+00:00

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