; sped - the stupidly pointless editor
; written by pinosaur
+; sped.asm: main file
-%include "fileutils.S"
+%include "macros.S"
-global main
extern printf
-extern fflush
-extern stdout
-
-; macros
-%macro write_str 2
- mov eax, 4
- mov ebx, 1
- mov ecx, %1
- mov edx, %2
- int 0x80
-%endmacro
+
+extern readFile
+extern repl
+
+global main
section .data
banner_str db `SPED - the stupidly pointless editor\n`, 0x00
- nofile_str db `no file provided\n`, 0x00
- prompt_str db `sped > `, 0x00
- invalidcommand_str db `invalid command\n`, 0x00
- charcount_str db `read %i chars\n`, 0x00
-
-section .bss
- buffer resb 4
- buffer_lines resb 4
- cur_line resb 4
+ nofile_str db `no file provided.\n`, 0x00
+ readlines_str db `opened file with %i lines.\n`, 0x00
section .text
main:
%define _ARGC 8
%define _ARGV 12
+ %define BUFFER 4
+ %define BUFFER_LINES 8
+ %define BUFFER_FILENAME 12
+
push ebp
mov ebp, esp
+ sub esp, 12
+
; read command line args
mov ecx, [ebp+_ARGC]
cmp ecx, 1
_main_existing:
mov ebx, DWORD [ebp+_ARGV]
add ebx, 4 ; first user arg is filename
- push DWORD [ebx]
+ mov ebx, [ebx]
+ mov [ebp-BUFFER_FILENAME], ebx
+
+ push DWORD [ebp-BUFFER_FILENAME]
call readFile
- mov [buffer], eax
- mov [buffer_lines], ebx
- mov DWORD [cur_line], 0x00
+ mov [ebp-BUFFER], eax
+ mov [ebp-BUFFER_LINES], ecx
+
+ push DWORD [ebp-BUFFER_LINES]
+ push readlines_str
+ call printf
+ push DWORD [ebp-BUFFER]
+ push DWORD [ebp-BUFFER_LINES]
+ push DWORD [ebp-BUFFER_FILENAME]
call repl
mov eax, 0
jmp _main_exit
_main_exit:
+
+ ; free string array
+
%undef _ARGC
%undef _ARGV
+ %undef BUFFER
+ %undef BUFFER_LINES
+ %undef BUFFER_FILENAME
mov esp, ebp
pop ebp
ret
-; prompt for user
-; no args - reads from globals
-repl:
-
- %define CMDSTR 4 ; the previous line read from user
-
- push ebp
- mov ebp, esp
-
- sub esp, 4
-
- _repl_loop:
-
- ; print the prompt
- push prompt_str
- call printf
- push DWORD [stdout]
- call fflush
-
- ; read line from stdin
- push 0
- call readLine
-
- mov DWORD [ebp-CMDSTR], eax
-
- ; commands are single char for now
- cmp ecx, 1
- jne _repl_invalid
-
- ; parse commands
- mov eax, DWORD [ebp-CMDSTR]
- mov eax, [eax]
-
- ; q exists program
- mov eax, DWORD [ebp-CMDSTR]
- cmp BYTE [eax], 'q'
- jne _repl_cmd_quit_end
- jmp _repl_exit
- _repl_cmd_quit_end:
-
-
- _repl_invalid:
- push invalidcommand_str
- call printf
-
- _repl_continue:
- jmp _repl_loop
-
- _repl_exit:
-
- %undef CMDSTR
-
- mov esp, ebp
- pop ebp
- ret
-