mirror of https://github.com/nmlgc/ReC98.git
120 lines
3.5 KiB
NASM
120 lines
3.5 KiB
NASM
; *Not* the original file, but an edit to turn it into an includable slice.
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; Changes include:
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; * removal of RULES.ASI to eliminate redundancy
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; * removal of external data and function references (and subsequent
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; correction of their symbols in the code)
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; * removal of the segment declarations (for obvious reasons)
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; * nopcall to ensure binary compatibility to the original builds of the PC-98
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; Touhou games
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;[]-----------------------------------------------------------------[]
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;| SETENVP.ASM -- Prepare Environment |
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;[]-----------------------------------------------------------------[]
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;
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; C/C++ Run Time Library - Version 5.0
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;
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; Copyright (c) 1987, 1992 by Borland International
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; All Rights Reserved.
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;
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SUBTTL Prepare Environment
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PAGE
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; Allocate a buffer to hold environment variables
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__setenvp proc near
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push si
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push di
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IF LDATA EQ 0
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mov cx, _envLng@
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push cx
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call _malloc
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pop cx
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mov di, ax
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or ax, ax
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jz _Failed ; Memory allocation failed
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push ds
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push ds
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pop es
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mov ds, _envseg@
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xor si, si
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cld
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rep movsb
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pop ds
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mov di, ax
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ELSE
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mov es, _envseg@
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xor di, di
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ENDIF
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; Allocate a buffer to hold envp array
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push es ; Save Environment Segment address
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push _envSize@
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nopcall _malloc
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pop bx
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mov bx, ax
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pop es ; Restore Environment Segment address
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IF LDATA
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mov word ptr environ@, ax
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mov word ptr environ@+2, dx
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push ds
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mov ds, dx
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or ax, dx
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ELSE
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mov word ptr environ@, ax
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or ax, ax
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ENDIF
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jnz SetEnviron
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nop ; Touhou PC-98 compatibility
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nop ; Touhou PC-98 compatibility
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_Failed label near ; Memory allocation failed
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jmp __abort
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; Now, store environment variables address
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SetEnviron label near
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xor ax, ax
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mov cx, -1
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IF LDATA
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cmp byte ptr es:[di], 0 ; Is the environment empty?
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ELSE
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cmp byte ptr [di], 0 ; Is the environment empty?
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ENDIF
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je SetEnviron1
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SetEnviron0 label near
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mov [bx], di
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IF LDATA
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mov [bx+2], es
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add bx, 4
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ELSE
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add bx, 2
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ENDIF
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repnz scasb
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cmp es:[di], al
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jne SetEnviron0 ; Set next pointer
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SetEnviron1 label near
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IF LDATA
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mov [bx], ax
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mov [bx+2], ax
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pop ds
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ELSE
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mov [bx], ax
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ENDIF
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pop di
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pop si
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IF LDATA
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mov ax,word ptr _environ+2
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mov word ptr __C0environ+2,ax
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ENDIF
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mov ax,word ptr _environ
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mov word ptr __C0environ,ax
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ret
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endp
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