printf: Support %i,%x,%X

src/console.asm

@@ -3,6 +3,7 @@
 extern	strlen
 extern	dec2str
 extern	udec2str
+extern	hex2str
 
 section .rodata
 	mNL		db	NL
@@ -63,7 +64,10 @@ puts:
 ;	%%	Literal percentage sign
 ;	%c	Single character
 ;	%d	Signed integer, printed as decimal
+;	%i	Alias for %d
 ;	%u	Unsigned integer, printed as decimal
+;	%x	Unsigned integer, printed as hexadecimal number (lowercase)
+;	%X	Unsigned integer, printed as hexadecimal number (uppercase)
 ;	%s	String
 ; <!> Unsupported specifiers are printed as-is
 ; <!> For all specifiers (except %%) an argument is expected. Mismatch between arguments given and specifiers provided will lead to issues
@@ -72,7 +76,7 @@ puts:
 ;	rdi*	(arg) pointer to format[] to format and print >> pointer to buffer
 ;	rsi*	(optional arg) >> Used for inserting strings to buffer
 ;	rdx*	(optional arg) >> Keeps track of amount of processed format specifiers
-;	rcx*	(optional arg)
+;	rcx*	(optional arg) >> Stores arg for %x/%X
 ;	r8*	(optional arg) >> Used for moving characters
 ;	r9*	(optional arg) >> Keeps track of where to jump after flushing buffer
 ;	r10*	Keeps track of current index of printfBuff
@@ -119,10 +123,16 @@ printf:
 		je	.rep_pct
 		cmp	byte [rdi + 1], 'c'
 		je	.rep_c
+		cmp	byte [rdi + 1], 'i'
+		je	.rep_d
 		cmp	byte [rdi + 1], 'd'
 		je	.rep_d
 		cmp	byte [rdi + 1], 'u'
 		je	.rep_d
+		cmp	byte [rdi + 1], 'x'
+		je	.rep_x
+		cmp	byte [rdi + 1], 'X'
+		je	.rep_x
 		cmp	byte [rdi + 1], 's'
 		je	.rep_s
 
@@ -150,7 +160,7 @@ printf:
 		mov	rsi, [rbp + RBP_OFFSET_CALLER + ((rdx-5) * SIZE_QWORD)]
 		jmp	.insertChar
 
-		;--- '%d' / '%u' ---;
+		;--- '%i' / '%d' / '%u' ---;
 		.rep_d:
 		cmp	rdx, 4
 		ja	.d_fromStack
@@ -163,14 +173,14 @@ printf:
 		push	rdx
 		push	rdi
 		sub	rsp, SIZE_QWORD
-		cmp	byte [rdi + 1], 'd'
-		je	.callINT2STR
-		mov	rdi, rsi
-		call	udec2str
-		jmp	.loadConvertedStr
-		.callINT2STR:
+		cmp	byte [rdi + 1], 'u'
+		je	.callUINT2STR
 		mov	rdi, rsi
 		call	dec2str
+		jmp	.loadConvertedStr
+		.callUINT2STR:
+		mov	rdi, rsi
+		call	udec2str
 		.loadConvertedStr:
 		mov	rsi, rax
 		add	rsp, SIZE_QWORD
@@ -179,6 +189,32 @@ printf:
 		pop	rax
 		jmp	.insertString
 
+		;--- '%x' / '%X' ---;
+		.rep_x:
+		push	rdi
+		cmp	rdx, 4
+		ja	.x_fromStack
+		mov	rcx, [printfArgs + SIZE_QWORD * rdx]
+		jmp	.convertHex
+		.x_fromStack:
+		mov	rcx, [rbp + RBP_OFFSET_CALLER + ((rdx-5) * SIZE_QWORD)]
+		.convertHex:
+		xor	rsi, rsi
+		mov	r8, 1
+		cmp	byte [rdi + 1], 'X'
+		cmove	rsi, r8
+		mov	rdi, rcx
+		push	rax
+		push	rdx
+		push	r9
+		call	hex2str
+		mov	rsi, rax
+		pop	r9
+		pop	rdx
+		pop	rax
+		pop	rdi
+		jmp	.insertString
+
 		;--- '%s' ---;
 		.rep_s:
 		cmp	rdx, 4

src/tests.asm

@@ -60,6 +60,8 @@ section .rodata
 	printf3C8		equ	'!'
 	printf4			db	TAB,"printf(",DQUO,"%d|%u , %d|%u\n",DQUO,", -50, -50, 0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF): ",NL,TAB,TAB,EOS
 	printf4Str		db	"%d|%u , %d|%u",NL,EOS
+	printf5			db	TAB,"printf(",DQUO,"%x|%X , %x|%X\n",DQUO,", 0xabcdeffedcba, 0x069bc0e, 666, -1): ",NL,TAB,TAB,EOS
+	printf5Str		db	"%x|%X , %x|%X",NL,EOS
 
 	; strlen()
 	strlenStr1		db	"Hello",EOS
@@ -207,6 +209,16 @@ _start:
 	mov	rcx, 0xFFFFFFFFFFFFFFFF
 	mov	r8, 0xFFFFFFFFFFFFFFFF
 	call	printf
+
+	; TEST 5
+	lea	rdi, [rel printf5]
+	call	print
+	lea	rdi, [rel printf5Str]
+	mov	rsi, 0xabcdeffedcba
+	mov	rdx, 0x069bc0e
+	mov	rcx, 666
+	mov	r8, -1
+	call	printf
 %endif
 
 ;---