kolibrios/programs/media/voxel_editor/trunk/str.inc

;
; ” ©« ¤«ï à ¡®âë á® áâப®¢ë¬¨ äã­ªæ¨ï¬¨
;

; str_len (str1)
;   „«¨­  áâப¨ (¢®§¢à é ¥âáï ¢ eax)

; str_cat (str1, str2)
;   „®¡ ¢«¥­¨¥ ª áâப¥ st1 áâப¨ str2

; str_n_cat (str1, str2, n_len)
;   „®¡ ¢«¥­¨¥ ª áâப¥ st1 áâப¨ str2. …᫨ áâப  str2 ¤«¨­­¥¥ 祬 n_len, â® ¤®¡ ¢«ïîâáï ¯¥à¢ë¥ n_len ᨬ¢®«®¢.

; conv_str_to_int (buf)
;   <EFBFBD>८¡à §®¢ ­¨¥ áâப¨ buf ¢ ç¨á«® (¢®§¢à é ¥âáï ¢ eax)

; convert_int_to_str (len)
;   <EFBFBD>८¡à §®¢ ­¨¥ ç¨á«  (eax) ¢ áâபã (edi). len - ¤«¨­­  áâப¨ edi, ª®â®àãî ¬®¦­® ¨á¯®«ì§®¢ âì ¤«ï ¯à¥®¡à §®¢ ­¨ï.


;output:
; eax = strlen
align 4
proc str_len, str1:dword
	mov eax,[str1]
	@@:
		cmp byte[eax],0
		je @f
		inc eax
		jmp @b
	@@:
	sub eax,[str1]
	ret
endp

align 4
proc str_cat uses eax ecx edi esi, str1:dword, str2:dword
	mov esi,[str2]
	stdcall str_len,esi
	mov ecx,eax
	inc ecx
	mov edi,[str1]
	stdcall str_len,edi
	add edi,eax
	cld
	repne movsb
	ret
endp

align 4
proc str_n_cat uses eax ecx edi esi, str1:dword, str2:dword, n_len:dword
	mov esi,[str2]
	mov ecx,[n_len]
	mov edi,[str1]
	stdcall str_len,edi
	add edi,eax
	cld
	repne movsb
	mov byte[edi],0
	ret
endp

;input:
; buf - 㪠§ â¥«ì ­  áâபã, ç¨á«® ¤®«¦­® ¡ëâì ¢ 10 ¨«¨ 16 à¨ç­®¬ ¢¨¤¥
;output:
; eax - ç¨á«®
align 4
proc conv_str_to_int uses ebx ecx esi, buf:dword
	xor eax,eax
	xor ebx,ebx
	mov esi,[buf]
	;®¯à¥¤¥«¥­¨¥ ®âà¨æ â¥«ì­ëå ç¨á¥«
	xor ecx,ecx
	inc ecx
	cmp byte[esi],'-'
	jne @f
		dec ecx
		inc esi
	@@:

	cmp word[esi],'0x'
	je .load_digit_16

	.load_digit_10: ;áç¨â뢠­¨¥ 10-â¨ç­ëå æ¨äà
		mov bl,byte[esi]
		cmp bl,'0'
		jl @f
		cmp bl,'9'
		jg @f
			sub bl,'0'
			imul eax,10
			add eax,ebx
			inc esi
			jmp .load_digit_10
	jmp @f

	.load_digit_16: ;áç¨â뢠­¨¥ 16-à¨ç­ëå æ¨äà
		add esi,2
	.cycle_16:
		mov bl,byte[esi]
		cmp bl,'0'
		jl @f
		cmp bl,'f'
		jg @f
		cmp bl,'9'
		jle .us1
			cmp bl,'A'
			jl @f ;®âᥨ¢ ¥¬ ᨬ¢®«ë >'9' ¨ <'A'
		.us1: ;á®áâ ¢­®¥ ãá«®¢¨¥
		cmp bl,'F'
		jle .us2
			cmp bl,'a'
			jl @f ;®âᥨ¢ ¥¬ ᨬ¢®«ë >'F' ¨ <'a'
			sub bl,32 ;¯¥à¥¢®¤¨¬ ᨬ¢®«ë ¢ ¢¥àå­¨© ॣ¨áâà, ¤«ï ã¯à®é¥­¨ï ¨å ¯®á«¥¤ã饩 ®¡à ¡®âª¨
		.us2: ;á®áâ ¢­®¥ ãá«®¢¨¥
			sub bl,'0'
			cmp bl,9
			jle .cor1
				sub bl,7 ;convert 'A' to '10'
			.cor1:
			shl eax,4
			add eax,ebx
			inc esi
			jmp .cycle_16
	@@:
	or ecx,ecx ;¥á«¨ ç¨á«® ®âà¨æ â¥«ì­®¥
	jnz @f
		neg eax
		inc eax
	@@:
	ret
endp

;input:
; eax - ç¨á«®
; edi - ¡ãä¥à ¤«ï áâப¨
; len - ¤«¨­­  ¡ãä¥à 
;output:
align 4
proc convert_int_to_str, len:dword
pushad
	mov esi,[len]
	add esi,edi
	dec esi
	bt eax,31
	jae @f
		;¥á«¨ ç¨á«® ®âà¨æ â¥«ì­®¥
		neg eax
		;inc eax ;???
		mov byte[edi],'-'
		inc edi
	@@:
	call .str
popad
	ret
endp

align 4
.str:
	mov ecx,0x0a ;§ ¤ ¥âáï á¨á⥬  áç¨á«¥­¨ï ¨§¬¥­ïîâáï ॣ¨áâàë ebx,eax,ecx,edx ¢å®¤­ë¥ ¯ à ¬¥âàë eax - ç¨á«®
	;¯à¥à¥¢®¤ ç¨á«  ¢ ASCII áâப㠢§®¤­ë¥ ¤ ­­ë¥ ecx=á¨á⥬  áç¨á«¥­ï edi  ¤à¥á ªã¤  § ¯¨á뢠âì, ¡ã¤¥¬ áâபã, ¯à¨ç¥¬ ª®­¥æ ¯¥à¥¬¥­­®© 
	cmp eax,ecx ;áà ¢­¨âì ¥á«¨ ¢ eax ¬¥­ìè¥ ç¥¬ ¢ ecx â® ¯¥à¥©â¨ ­  @@-1 â.¥. ­  pop eax
	jb @f
		xor edx,edx ;®ç¨áâ¨âì edx
		div ecx   ;à §¤¥«¨âì - ®áâ â®ª ¢ edx
		push edx  ;¯®«®¦¨âì ¢ á⥪
		;dec edi  ;ᬥ饭¨¥ ­¥®¡å®¤¨¬®¥ ¤«ï § ¯¨á¨ á ª®­æ  áâப¨
		call .str ;¯¥à¥©â¨ ­  á ¬ã ᥡï â.¥. ¢ë§¢ âì á ¬ã á¥¡ï ¨ â ª ¤® ⮣® ¬®¬¥­â  ¯®ª  ¢ eax ­¥ áâ ­¥â ¬¥­ìè¥ ç¥¬ ¢ ecx
		pop eax
	@@: ;cmp al,10 ;¯à®¢¥à¨âì ­¥ ¬¥­ìè¥ «¨ §­ ç¥­¨¥ ¢ al 祬 10 (¤«ï á¨á⥬ë áç¨á«¥­ï 10 ¤ ­­ ï ª®¬ ­¤  - «¨è­ ï))
	cmp edi,esi
	jge @f
		or al,0x30 ;¤ ­­ ï ª®¬ ­¤  ª®à®ç¥  祬 ¤¢¥ ¢ëè¥
		stosb      ;§ ¯¨á âì í«¥¬¥­â ¨§ ॣ¨áâà  al ¢ ï祪㠯 ¬ï⨠es:edi
		mov byte[edi],0 ;¢ ª®­¥æ áâப¨ áâ ¢¨¬ 0, çâ®-¡ë ­¥ ¢ë« §¨« ¬ãá®à
	@@:
	ret	   ;¯®ª  ¢ á⥪¥ åà ­¨âìáï ª®«-¢® ¢ë§®¢®¢ â® á⮫쪮 à § ¬ë ¨ ¡ã¤¥¬ ¢ë§ë¢ âìáï