kolibrios/programs/develop/mtdbg/cmd_hist.inc
Kenshin 6b05d70aad * displaying of labels is fixed
* command history
* documentation slightly updated

git-svn-id: svn://kolibrios.org@8591 a494cfbc-eb01-0410-851d-a64ba20cac60
2021-02-12 18:08:07 +00:00

258 lines
5.3 KiB
PHP

init_cmd_hist_buffer:
;-------------------------------------------------------------------------------
push eax ebx ecx
mcall 68, 12, 4096 ;allocate 4KB block
mov [cmd_hist_buffer.ptr], eax
mov [cmd_hist_buffer.size], ecx
mov edi, eax
xor eax, eax
stosd
stosd
mov [cmd_hist_buffer.new_node_offset], eax
mov [cmd_hist_buffer.last_node_offset], eax
mov [cmd_hist_buffer.cur_node_offset], eax
mov [cmd_hist_buffer.tmp_line_flag], al
mov [cmd_hist_buffer.n_flag], al
pop ecx ebx eax
ret
;-------------------------------------------------------------------------------
enlarge_cmd_hist_buffer:
;-------------------------------------------------------------------------------
pusha
mov ecx, [cmd_hist_buffer.size]
add ecx, 4096
mov edx, [cmd_hist_buffer.ptr]
mcall 68, 20 ;reallocate the buffer (prev. size + 4KB)
test eax, eax
jz .err
mov [cmd_hist_buffer.ptr], eax
mov [cmd_hist_buffer.size], ecx
.ok:
clc
popa
ret
.err:
stc
popa
ret
;-------------------------------------------------------------------------------
add_cmd_hist_line:
;-------------------------------------------------------------------------------
;in:
;eax = ptr to ASCIIZ string of line
;-------------------------------------------------------------------------------
pusha
mov esi, eax
mov edx, eax
xor ecx, ecx
@@:
inc ecx
lodsb
test al, al
jz @f
jmp @b
@@:
dec ecx
jz .ok
inc ecx
mov eax, [cmd_hist_buffer.new_node_offset]
lea eax, [eax+ecx+2*4]
cmp [cmd_hist_buffer.size], eax
jae @f
call enlarge_cmd_hist_buffer
jc .err
@@:
mov edi, [cmd_hist_buffer.new_node_offset]
mov eax, [cmd_hist_buffer.ptr]
add edi, eax
cmp eax, edi ;if eax = edi, then it's the first node
jne @f
xor eax, eax
dec eax
stosd ;save previous node link = -1 for the first node
stosd ;save next node link = -1 for the first node
jmp .cp_str
@@:
mov ebx, [cmd_hist_buffer.last_node_offset]
mov [edi], ebx ;save previous node link for a new node
add ebx, eax
mov eax, [cmd_hist_buffer.new_node_offset]
mov [ebx+4], eax ;update next node link for a last node
mov [cmd_hist_buffer.last_node_offset], eax
mov [cmd_hist_buffer.cur_node_offset], eax
add edi, 4
xor eax, eax
dec eax
stosd
.cp_str:
mov esi, edx
push ecx
rep movsb
pop ecx
add ecx, 2*4
add [cmd_hist_buffer.new_node_offset], ecx
.ok:
clc
.err:
mov [cmd_hist_buffer.tmp_line_flag], 0
popa
ret
;-------------------------------------------------------------------------------
add_cmd_hist_tmp_line:
;-------------------------------------------------------------------------------
;in:
;eax = ptr to ASCIIZ string of line
;-------------------------------------------------------------------------------
pusha
mov esi, eax
mov edx, eax
xor ecx, ecx
@@:
inc ecx
lodsb
test al, al
jz @f
jmp @b
@@:
mov eax, [cmd_hist_buffer.new_node_offset]
lea eax, [eax+ecx+2*4]
cmp [cmd_hist_buffer.size], eax
jae @f
call enlarge_cmd_hist_buffer
jc .err
@@:
mov edi, [cmd_hist_buffer.new_node_offset]
mov [cmd_hist_buffer.tmp_line_flag], 1
mov eax, [cmd_hist_buffer.ptr]
add edi, eax
xor eax, eax
stosd
stosd ;two zeroes - marker (prefix) of tmp line
.cp_str:
mov esi, edx
rep movsb
.ok:
clc
.err:
popa
ret
;-------------------------------------------------------------------------------
get_cmd_hist_line:
;-------------------------------------------------------------------------------
;out:
;eax = ptr to ASCIIZ string of current line
;-------------------------------------------------------------------------------
push ebx
mov eax, [cmd_hist_buffer.ptr]
mov ebx, [cmd_hist_buffer.cur_node_offset]
lea eax, [eax + ebx + 2*4]
pop ebx
ret
;-------------------------------------------------------------------------------
get_cmd_hist_tmp_line:
;-------------------------------------------------------------------------------
;out:
;eax = ptr to ASCIIZ string of current line or 0 (no tmp line)
;-------------------------------------------------------------------------------
cmp [cmd_hist_buffer.tmp_line_flag], 0
je @f
mov eax, [cmd_hist_buffer.new_node_offset]
add eax, [cmd_hist_buffer.ptr]
add eax, 2*4
@@:
ret
;-------------------------------------------------------------------------------
prev_cmd_hist_line:
;-------------------------------------------------------------------------------
;out:
;CF = 0 - OK, CF = 1 (no previous lines)
;-------------------------------------------------------------------------------
push eax ebx
mov eax, [cmd_hist_buffer.ptr]
mov ebx, [cmd_hist_buffer.cur_node_offset]
lea eax, [eax+ebx]
mov eax, [eax]
inc eax
jz .ret_cf
dec eax
mov [cmd_hist_buffer.cur_node_offset], eax
clc
pop ebx eax
ret
.ret_cf:
stc
pop ebx eax
ret
;-------------------------------------------------------------------------------
next_cmd_hist_line:
;-------------------------------------------------------------------------------
;out:
;CF = 0 - OK, CF = 1 (no next lines)
;-------------------------------------------------------------------------------
push eax ebx
mov eax, [cmd_hist_buffer.ptr]
mov ebx, [cmd_hist_buffer.cur_node_offset]
lea eax, [eax+ebx]
mov eax, [eax+4]
inc eax
jz .ret_cf
dec eax
mov [cmd_hist_buffer.cur_node_offset], eax
clc
pop ebx eax
ret
.ret_cf:
stc
pop ebx eax
ret
;-------------------------------------------------------------------------------