rename.mac

来自「--- --- ---基于C语言的编译器的 简单实现」· MAC 代码 · 共 38 行

 INCLUDE PROLOG.H
_CC1:
 PUBLIC _rename
_rename:
 MOV BX,4
 ADD BX,SP
 MOV BX,[BX]
 PUSH BX  ;
 MOV BX,4
 ADD BX,SP
 MOV BX,[BX]
 PUSH BX  ;
 CALL _Urename
 ADD SP,4
 RET
 PUBLIC _Urename
_Urename:
  POP SI  ;Return address
  POP DI  ;New name address
  POP DX  ;Current name address
  PUSH DX  ;Restore
  PUSH DI
  PUSH SI
  MOV AX,DS
  MOV ES,AX ;Set extra segment as our own
  MOV AH,56H ;Rename
  INT 21H
  JNC URENAM1
  MOV _ERRNO,AX
  MOV AX,-2
Urenam1:
  MOV BX,AX
  XOR CX,CX  ;Zero in CX
  EXTRN _ERRNO:WORD
 RET
 INCLUDE EPILOG.H
 END