从文本文件中读取并对文件中的十六进制值求和

如何解决从文本文件中读取并对文件中的十六进制值求和

我目前能够从文件中读取并打印出文件中的文本，但我无法将文本转换为普通数字以便能够对它们求和。

我需要能够读取每一行并对每行十六进制值求和。行是：

0x3,0x372,0xab
0x3ed,0x4444f
0x1,0x12,0x123,0x1234,0x123456,0x1234567,0x12345678,0x123456789

I.E - 第一行应该打印为：0x420

这是我当前的汇编代码：

section .data
; -----
; Define standard constants.
LF equ 10 ; line Feed
NULL equ 0 ; end of string
TRUE equ 1
FALSE equ 0
EXIT_SUCCESS equ 0 ; success code
STDIN equ 0 ; standard input
STDOUT equ 1 ; standard output
STDERR equ 2 ; standard error
SYS_read equ 0 ; read
SYS_write equ 1 ; write
SYS_open equ 2 ; file open
SYS_close equ 3 ; file close
SYS_fork equ 57 ; fork
SYS_exit equ 60 ; terminate
SYS_creat equ 85 ; file open/create
SYS_time equ 201 ; get time
O_CREAT equ 0x40
O_Trunc equ 0x200
O_APPEND equ 0x400
O_RDONLY equ 000000q ; read only
O_WRONLY equ 000001q ; write only
O_RDWR equ 000002q ; read and write
S_IRUSR equ 00400q
S_IWUSR equ 00200q
S_IXUSR equ 00100q
; -----
; Variables/constants for main.
BUFF_SIZE equ 255 


newLine db LF,NULL
header db LF,""
db LF,LF,NULL
fileName db "text.txt",NULL
fileDesc dq 0
errMsgOpen db "Error opening the file.",NULL
errMsgRead db "Error reading from the file.",NULL
; -------------------------------------------------------
section .bss
readBuffer resb BUFF_SIZE
; -------------------------------------------------------
section .text
global _start
_start:
mov r10,0
mov r9,0

global openInputFile
openInputFile:
mov rax,SYS_open 
mov rdi,fileName 
mov rsi,O_RDONLY 
syscall 
cmp rax,0 
jl errorOnopen
mov qword [fileDesc],rax 
mov rax,SYS_read


mov rdi,qword [fileDesc]
mov rsi,readBuffer
mov rdx,BUFF_SIZE
syscall
cmp rax,0
jl errorOnRead

mov rsi,readBuffer
mov byte [rsi+rax],NULL
mov rdi,readBuffer
call printString

mov rax,SYS_close
mov rdi,qword [fileDesc]
syscall
jmp exampleDone

errorOnopen:
mov rdi,errMsgOpen

jmp exampleDone


errorOnRead:
mov rdi,errMsgRead

jmp exampleDone

exampleDone:
mov rax,SYS_exit
mov rdi,EXIT_SUCCESS
syscall

global printString
printString:
push rbp
mov rbp,rsp
push rbx

mov rbx,rdi
mov rdx,0

strCountLoop:
cmp byte[rbx],NULL
je strCountDone
cmp byte[rbx],0x0a
inc r10
inc rdx
inc rbx
jmp strCountLoop

wordCalc:
cmp r10,1
je strCountLoop
add r9,rdx
cmp byte[rdx],0x0a
jmp strCountLoop



global strCountDone
strCountDone:
cmp rdx,0
je prtDone


mov rax,SYS_write 
mov rsi,rdi 
mov rdi,STDOUT 

syscall 

global prtDone
prtDone:
mov r10,rbp
pop rbx
pop rbp
ret

我尝试将 rbx 中的值添加到 r9 以便我可以打印出每一行的 r9 值。我还没有实现 r9 打印和 r9 重置，因为我还不能将文本用作数字，而且我不知道如何正确打印 r9。