kvisc/ka/crt/fmt/printf.k

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; The OS/K Team licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.
;
; int putc(int ch)
;
putc:
prn ax0
xor rax, rax
ret
;
; int printf(const char *fmt, ...)
;
printf:
mov ax2, ax0
mov ax0, putc
mov ax1, STRLEN_MAX
lea ax3, b[rsp+8]
jmp doprnt
;
; int nprintf(const char *fmt, int n, ...)
;
nprintf:
mov ax2, ax0
mov ax0, putc
lea ax3, b[rsp+8]
jmp doprnt
;
; Print a string
;
print:
mov rcx, STRLEN_MAX
b.z b[ax0], 0, .1
prns.rep.nz ax0
.1:
ret
;
; Print exactly ax1 characters
;
print_n:
mov rcx, ax1
b.z b[ax0], 0, .1
prns.rep.nz ax0
.1:
ret