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[20210810]完善vim bccalc_win插件.txt

原创 Linux操作系统 作者:lfree 时间:2021-08-12 09:06:33 0 删除 编辑

[20210810]完善vim bccalc_win插件.txt

--//前一段时间改写vim bccalc_win插件,发现使用\16x计算取模时存在问题,计算错误。
--//建议不采用bc -l模式计算,采用bc模式计算.

--//测试如下:
10210a5e = 270600798
270600798 % 131072 %7+1 = 4    ===> 使用bc计算    \c0
10210a5e % 20000 % 7 +1 = 0x4  ===> 使用bc计算    \16x
--//以下计算错误:
10210a5e % 20000 % 7 +1 = 0x1  ===> 使用bc -l计算 \16x
270600798 % 131072 %7+1 = 1    ===> 使用bc -l计算 \cc
10210a5e % 20000 % 7 +1 = 1    ===> 使用bc -l计算 \10

--//顺便加入更多的注解,避免以后自己都读不懂源代码。在读代码时,我还发现源作者有一个插入模式计算方式,
--//实际上以前blog的上也有说明:

inoremap =: = <Esc>"eyy:call CalcLines(0)<CR>a

--//在输入表达式时输入=:就可以知道结果,当然输入要快。例子:"
12*4.2= 50.4

--//如果无法计算,显示如下,这种模式自己不太喜欢,仅仅加入=- (10to16,16to10的转换),其他不作扩展了。
123123a= (standard_in) 1: parse error

--//如果输入太慢就是如下,另外注意set paste问题,这样在插入模式无效。
12*4.2=:

--//另外为了代码的通用性修改加入如下:
    if has("windows")
        let str = substitute (str, '\^', '^^^^',    "g")
    endif

--//windows的命令行有一些变态,必须输入4个^才表示1个^.
D:\>echo 2^5 | bc
25

D:\>echo 2^^^^5 | bc
32

--//另外取消了提示行显示结果的需求,结果直接输出并且自动判断是否在结尾输入=.没有输入自动补上,整个改动有点大。
    " append answer or echo
    if has_equal == 1
        exec "normal a " . answer
    else
        exec "normal a " . "= " . answer
        "" echo "answer = " . answer
    endif

--//源代码如下,bc.exe可执行程序自己要另行安装,一般我选择unxutils包.另外我测试仅仅<Leader>开头的命令。
$ cat vim bccalc_win.vim

"" calculate expression entered on command line and give answer, e.g.:
"" :Calculate sin (3) + sin (4) ^ 2
command! -nargs=+ Calculate echo "<args> = " . Calculate ("<args>",0)

"" calculate expression from selection using bc -l, pick a mapping, or use the Leader form
vnoremap ;bc "ey`>:call CalcLines(0)<CR>
vnoremap ;bb "ey`>:call CalcLines(0)<CR>

"" convert hexdecimal to decimal
vnoremap ;10 "ey`>:call CalcLines(10)<CR>

"" convert hexdecimal to decimal
vnoremap ;16 "ey`>:call CalcLines(16)<CR>

"" computer hexdecimal to hexdecimal
vnoremap ;16x "ey`>:call CalcLines(1016)<CR>

"" split event P1 to TYPE and MODE
vnoremap ;tx "ey`>:call CalcLines(1616)<CR>

"" split dba(10) or dba(16) to file# and block#
vnoremap ;22 "ey`>:call CalcLines(22)<CR>
vnoremap ;dba "ey`>:call CalcLines(22)<CR>

"" split scn(10) or scn(16) into scn_wrap,scn_base
vnoremap ;32 "ey`>:call CalcLines(32)<CR>
vnoremap ;scn "ey`>:call CalcLines(32)<CR>

"" convert scn_wrap,scn_base(10) or scn_wrap,scn_base(16) to 10 or 16 base
vnoremap ;ss "ey`>:call CalcLines(10016)<CR>

"" convert file#,block# dba(10) or file#,block# dba(16) to 10 or 16 base
vnoremap ;rr "ey`>:call CalcLines(20016)<CR>

"" convert hexdecimal to decimal or decimal to hexdecimal
vnoremap ;hd "ey`>:call CalcLines(30016)<CR>
vnoremap ;hh "ey`>:call CalcLines(30016)<CR>
vnoremap ;dh "ey`>:call CalcLines(30016)<CR>

"" --------------------------------------------------------------------
"" calculate expression on current line using bc -l, pick a mapping, or use the Leader
nnoremap  <Leader>bx <Esc>"eyy$:call CalcLines(0)<CR>
nnoremap  <Leader>bc <Esc>"eyy$:call CalcLines(0)<CR>
nnoremap  <Leader>bb <Esc>"eyy$:call CalcLines(0)<CR>
noremap   <Leader>cc Yp!!bc -lq\| tr -d '\n\\\r' \| sed -e "s/\.\([0-9]*[1-9]\)0\+$/.\1/" -e "s/\.0\+$//"<CR>kA = <ESC>J

"" calculate expression on current line using bc , pick a mapping, or use the Leader
noremap   <Leader>c0 Yp!!bc -q\| tr -d '\n\\\r' \| sed -e "s/\.\([0-9]*[1-9]\)0\+$/.\1/" -e "s/\.0\+$//"<CR>kA = <ESC>J

"" calculate expression on current line ( delete ,) using bc -l,  pick a mapping, or use the Leader
noremap   <Leader>c, Yp!!sed "s/,//g" \|bc -lq\| tr -d '\n\\\r' \| sed -e "s/\.\([0-9]*[1-9]\)0\+$/.\1/" -e "s/\.0\+$//"<CR>kA = <ESC>J

"" convert hexdecimal to decimal
nnoremap  <Leader>10 <Esc>"eyy$:call CalcLines(10)<CR>

"" convert decimal to hexdecimal
nnoremap  <Leader>16 <Esc>"eyy$:call CalcLines(16)<CR>

"" computer hexdecimal to hexdecimal
nnoremap  <Leader>16x <Esc>"eyy$:call CalcLines(1016)<CR>

"" split event P1 to TYPE and MODE
nnoremap  <Leader>tx  <Esc>"eyy$:call CalcLines(1616)<CR>

"" split dba(10) or dba(16) to file# and block#
nnoremap  <Leader>22  <Esc>"eyy$:call CalcLines(22)<CR>
nnoremap  <Leader>dba <Esc>"eyy$:call CalcLines(22)<CR>

"" split scn(10) or scn(16) into scn_wrap,scn_base
nnoremap  <Leader>32  <Esc>"eyy$:call CalcLines(32)<CR>
nnoremap  <Leader>scn <Esc>"eyy$:call CalcLines(32)<CR>

"" convert scn_wrap,scn_base(10) or scn_wrap,scn_base(16) to 10 or 16 base
nnoremap  <Leader>ss <Esc>"eyy$:call CalcLines(10016)<CR>

"" convert file#,block# dba(10) or file#,block# dba(16) to 10 or 16 base
nnoremap  <Leader>rr <Esc>"eyy$:call CalcLines(20016)<CR>

"" convert hexdecimal to decimal or decimal to hexdecimal
nnoremap  <Leader>hd <Esc>"eyy$:call CalcLines(30016)<CR>
nnoremap  <Leader>hh <Esc>"eyy$:call CalcLines(30016)<CR>
nnoremap  <Leader>dh <Esc>"eyy$:call CalcLines(30016)<CR>

"" --------------------------------------------------------------------
"" calculate from insertmode
inoremap =: =<Esc>"eyy$:call CalcLines(0)<CR>a
inoremap =- =<Esc>"eyy$:call CalcLines(30016)<CR>a

"" --------------------------------------------------------------------
""  Calculate:
""    clean up an expression, pass it to bc, return answer
function! Calculate (s,flag)

    let has_hex = 0
    let str = a:s

    " remove newlines and trailing spaces
    let str = substitute (str, "\n",   "", "g")
    let str = substitute (str, '\s*$', "", "g")

    " sub common func names for bc equivalent
    let str = substitute (str, '\csin\s*(',  's (', 'g')
    let str = substitute (str, '\ccos\s*(',  'c (', 'g')
    let str = substitute (str, '\catan\s*(', 'a (', 'g')
    let str = substitute (str, "\cln\s*(",   'l (', 'g')
    let str = substitute (str, '\clog\s*(',  'l (', 'g')
    let str = substitute (str, '\cexp\s*(',  'e (', 'g')

    " alternate exponitiation symbols
    let str = substitute (str, '\*\*', '^', "g")
    let str = substitute (str, '`', '^',    "g")

    if has("windows")
        let str = substitute (str, '\^', '^^^^',    "g")
    endif

    " escape chars for shell
    if has("unix")
        let str = escape (str, '*();&><|^')
    endif

    let preload = exists ("g:bccalc_preload") ? g:bccalc_preload : ""

    " run bc
    " return str
    " let answer = system ("echo " . str . " \| bc -l " . preload)

    if a:flag == 0
         let answer = system ("echo " . str . " \| bc -l " . preload)
         " let answer = answer . " --- ". str
    endif

    if a:flag == 10
        let str = toupper (str)
        let str = substitute (str, "0x", "", "g")
        let answer = system ("echo ibase=16 ;" . str .  " \| bc -l " . preload)
    endif

    if a:flag == 16
        let answer = system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
        let answer = "0x" . tolower ( answer )
    endif

    if a:flag == 1016
        let str = toupper (str)
        let str = substitute (str, "0x", "", "g")
        let answer = system ("echo obase=16 ;ibase =16;" . str .  " \| bc " . preload)
        let answer = "0x" . tolower ( answer )
    endif

    let has_hex = Check_hex(str)

    if a:flag == 1616
        if has_hex == 1
            let str = toupper (str)
            let str = substitute (str, "0x", "", "g")
            " 0x10000 hexdecimal = 65536 (10) = 2^16(10)
            let answer  = system ("echo ibase=16 ;" . str . "/10000" . " \| bc " . preload)
            let answer1 = system ("echo ibase=16 ;" . str . "%10000" . " \| bc " . preload)
            let answer2 = system ("echo ibase=16 ;" . str .  " \| bc -l " . preload)
        else
            let answer  = system ("echo " . str . "/65536" . " \| bc " . preload)
            let answer1 = system ("echo " . str . "%65536" . " \| bc " . preload)
            let answer2 = "0x" . system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
        endif
        let answer = "/2^16  %2^16 (Type | Mode) = " . answer . "," . answer1 ." = " . tolower(answer2)
    endif

    if a:flag == 22
        if has_hex == 1
            let str = toupper (str)
            let str = substitute (str, "0x", "", "g")
            " 0x400000 hexdecimal = 4194304 (10) = 2^22(10)
            let answer  = system ("echo ibase=16 ;" . str . "/400000" . " \| bc " . preload)
            let answer1 = system ("echo ibase=16 ;" . str . "%400000" . " \| bc " . preload)
            let answer2 = system ("echo ibase=16 ;" . str .  " \| bc -l " . preload)
        else
            let answer  = system ("echo " . str . "/4194304" . " \| bc " . preload)
            let answer1 = system ("echo " . str . "%4194304" . " \| bc " . preload)
            let answer2 = "0x" . system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
        endif
        " let answer = "set dba " . answer . "," . answer1
        let answer = "set dba " . answer . "," . answer1 ." = alter system dump datafile " . answer . " block " . answer1 ." = " . tolower(answer2)
    endif

    if a:flag == 32
        if has_hex == 1
            let str = toupper (str)
            let str = substitute (str, "0x", "", "g")
            " 0x100000000 hexdecimal = 4294967296(10) = 2^32(10)
            let answer  = system ("echo ibase=16 ;" . str . "/100000000" . " \| bc " . preload)
            let answer1 = system ("echo ibase=16 ;" . str . "%100000000" . " \| bc " . preload)
            let answer2 = system ("echo obase=16 ;ibase=16 ;" . str . "/100000000" . " \| bc " . preload)
            let answer3 = system ("echo obase=16 ;ibase=16 ;" . str . "%100000000" . " \| bc " . preload)
        else
            let answer  = system ("echo " . str . "/4294967296" . " \| bc " . preload)
            let answer1 = system ("echo " . str . "%4294967296" . " \| bc " . preload)
            let answer2 = system ("echo obase=16 ;" . str . "/4294967296" . " \| bc " . preload)
            let answer3 = system ("echo obase=16 ;" . str . "%4294967296" . " \| bc " . preload)
        endif
        let answer = "scn_wrap,scn_base(10): " . answer . "," . answer1 . " = scn_wrap,scn_base(16): " . "0x" . tolower (answer2) . "," . "0x" . tolower(answer3)
    endif

    if a:flag == 10016
        if has_hex == 1
            let str = toupper (str)
            let str = substitute (str, "0x", "", "g")
            " 0x100000000 hexdecimal = 4294967296(10) = 2^32(10)
            let str = substitute (str, "[,.]", "*100000000+", "g")
            let answer  = system ("echo obase=10 ;ibase=16 ;" . str .  " \| bc -l " . preload)
            let answer1 = system ("echo obase=16 ;ibase=16 ;" . str .  " \| bc -l " . preload)
        else
            let str = substitute (str, "[,.]", "*4294967296+", "g")
            let answer  = system ("echo " . str . " \| bc -l " . preload)
            let answer1 = system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
        endif
        let answer = "scn(10): " . answer . " = scn(16): " . "0x" . tolower (answer1)
    endif

    if a:flag == 20016
        if has_hex == 1
            let str = toupper ( str )
            let str = substitute (str, "0x", "", "g")
            " 0x400000 hexdecimal = 4194304 (10) = 2^22(10)
            let str = substitute (str, "[,.]", "*400000+", "g")
            let answer  = system ("echo obase=10 ;ibase=16 ;" . str .  " \| bc -l " . preload)
            let answer1 = system ("echo obase=16 ;ibase=16 ;" . str .  " \| bc -l " . preload)
        else
            let str = substitute (str, "[,.]", "*4194304+", "g")
            let answer  = system ("echo " . str . " \| bc -l " . preload)
            let answer1 = system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
        endif
        let answer = "file#,block# dba(10): " . answer . " = file#,block# dba(16): " . "0x" . tolower (answer1)
    endif

    if a:flag == 30016
        if has_hex == 1
            let str = substitute (str, "0x", "", "g")
            let str = toupper ( str )
            let answer = system ("echo ibase=16 ;" . str .  " \| bc -l " . preload)
        else
            let answer = system ("echo obase=16 ;" . str .  " \| bc -l " . preload)
            let answer = "0x" . tolower ( answer )
        endif
    endif

    " strip newline and \
    let answer = substitute (answer, "[\\\n]", "", "g")

    " strip trailing 0s in decimals
    let answer = substitute (answer, '\.\(\d*[1-9]\)0\+$', '.\1', "")
    let answer = substitute (answer, '\.0\+$', '', "")

    return answer
endfunction

" ---------------------------------------------------------------------
" CalcLines:
"
" take expression from lines, either visually selected or the current line,
" pass to calculate function, echo or past answer after '='
function! CalcLines(flag)

    let has_equal = 0

    " remove newlines and trailing spaces
    let @e = substitute (@e, "\n", "",   "g")
    let @e = substitute (@e, '\s*$', "", "g")

    " if we end with an equal, strip, and remember for output
    if @e =~ "=$"
        let @e = substitute (@e, '=$', "", "")
        let has_equal = 1
    endif

    " if there is another equal in the line, assume chained equations, remove leading ones
    let @e = substitute (@e, '^.\+=', '', '')

    let answer = Calculate (@e,a:flag)

    " append answer or echo
    if has_equal == 1
        exec "normal a " . answer
    else
        exec "normal a " . "= " . answer
        "" echo "answer = " . answer
    endif
endfunction

" ---------------------------------------------------------------------
" Check_hex:
"
" Check if the string contains 0x, a, b, c, d, e, f  return has_hex=1
function! Check_hex(str)
    let has_hex = 0
    let ss = a:str
    let ss = tolower ( ss )

    if ss =~ "0x"
        let has_hex = 1
        return has_hex
    endif

    if ss =~ "[abcdef]"
        let has_hex = 1
        return has_hex
    endif

endfunction

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