Procedure to add commas into number strings

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me239

Joined: 06 Jan 2011
Posts: 200

me239 01 Aug 2011, 01:05

Hey everyone! I was wondering if anyone had any example procedures for adding commas into number strings eg. 12345 = 12,345
Thanks!

01 Aug 2011, 01:05

edfed

Joined: 20 Feb 2006
Posts: 4330
Location: Now

edfed 01 Aug 2011, 01:50

use something like this:

Code:

mov eax,12345
call fixeddecimal
mov esi,string
call print
...
string db 'xx,xxx'
strend db 0
...
fixeddecimal:
        push eax ebx ecx edx
        mov ecx,10
        mov ebx,[strend]
.loop:
        dec ebx
        cmp byte[ebx],'.'
        jne @f
        dec ebx
@@:
        cmp ebx,[string]
        jl .end
        xor edx,edx
        div ecx
        or edx,edx
        jne @f
        or eax,eax
        jne @f
        mov dl,' '-'0'
@@:
        add dl,'0'
        mov [ebx],dl
        jmp .loop
.end:
        pop edx ecx ebx eax
        ret

01 Aug 2011, 01:50

me239

Joined: 06 Jan 2011
Posts: 200

me239 01 Aug 2011, 02:04

edfed wrote:

use something like this:

Code:

mov eax,12345
call fixeddecimal
mov esi,string
call print
...
string db 'xx,xxx'
strend db 0
...
fixeddecimal:
        push eax ebx ecx edx
        mov ecx,10
        mov ebx,[strend]
.loop:
        dec ebx
        cmp byte[ebx],'.'
        jne @f
        dec ebx
@@:
        cmp ebx,[string]
        jl .end
        xor edx,edx
        div ecx
        or edx,edx
        jne @f
        or eax,eax
        jne @f
        mov dl,' '-'0'
@@:
        add dl,'0'
        mov [ebx],dl
        jmp .loop
.end:
        pop edx ecx ebx eax
        ret

Thanks, but is there anyway to convert a number of any size without using a string with preexisting commas? BTW I'm still in 16 bit realmode.

01 Aug 2011, 02:04

bitshifter

Joined: 04 Dec 2007
Posts: 796
Location: Massachusetts, USA

bitshifter 01 Aug 2011, 02:16

You want to put comma in every 3 positions?

Thousands...
Hundred Thousands...

12,345,678

01 Aug 2011, 02:16

me239

Joined: 06 Jan 2011
Posts: 200

me239 01 Aug 2011, 02:23

bitshifter wrote:

You want to put comma in every 3 positions?

Thousands...
Hundred Thousands...

12,345,678

Ya, pretty much. Well as much as a dword can hold.

01 Aug 2011, 02:23

edfed

Joined: 20 Feb 2006
Posts: 4330
Location: Now

edfed 01 Aug 2011, 11:20

to use commas, you should add a test for comma like this:

Code:

.loop:
        dec ebx
        cmp byte[ebx],'.'
        jne @f
        dec ebx
@@: 
        cmp  [ebx],',' ;test for comma
        jne @f
        dec ebx
@@:

for a number like 4,143,321.433 the string will look like this:

Code:

db 'x,xxx,xxx.xxx'

if you give a string like this:

Code:

db ',,,,,,,,,,,,,x'

the function will give this result for the number 1234567

Code:

db '1,2,3,4,5,6,7'

but it is possible to modify the algo

Code:

.loop:
        dec ebx
        cmp byte[ebx],'.'
        je .loop
        cmp byte[ebx],','
        je .loop

and then, the result of number 12345 with string 'X,,X,,x,,,,,x,,,,,x' will be '1,,2,,3,,,,,4,,,,,5'

01 Aug 2011, 11:20

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 01 Aug 2011, 16:06

libc's sprintf or fasmlib's str.ins plus simple loop

01 Aug 2011, 16:06

DOS386

Joined: 08 Dec 2006
Posts: 1900

DOS386 02 Aug 2011, 13:09

me239 wrote:

Hey everyone! I was wondering if anyone had any example procedures for adding commas into number strings eg. 12345 = 12,345 Thanks!

But I have cool code adding apo's instead ... so your "12,345" won't become "12+345/1'000" (imagine you get just cca 12 $$$ instead of 12'345 $$$ for your work Very Happy

)

02 Aug 2011, 13:09

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