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[BUG/PRB.] VFP 9.0 FIX - ALWAYS COPY FILES ON DISK IN THE COPY FILE COMMAND
September 2024
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CCB
1. BUG:
In vfp9 (and vfp6, vfp7, vfp8), if the file on disk exists and the file in the compiled executable file does not exist,
it copies the file on disk to the destination file,
if the file on disk exists and the file in the compiled executable file exists,
it copies the file in the compiled executable file to the destination file.
In VFP Advanced, if we enable always copying files on disk in the COPY FILE command,
if the file on disk exists, it always copies the file on disk to the destination file.
2. CAUSE:
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Label6d6c7f ::
pushd 0100h ;0x006d6c7f : 6800010000
lea eax , dword ptr [ ebp - 52 ] ;0x006d6c84 : 8d45cc
push eax ;0x006d6c87 : 50
lea eax , dword ptr [ ebp - 48 ] ;0x006d6c88 : 8d45d0
push eax ;0x006d6c8b : 50
lea eax , dword ptr [ ebp - 16 ] ;0x006d6c8c : 8d45f0
push eax ;0x006d6c8f : 50
push edi ;0x006d6c90 : 57
push ebx ;0x006d6c91 : 53
call Fun42cd23 ;0x006d6c92 : e88c60d5ff
;
; --------------------------------------------------------------------------
; VFP 9.0 FIX - ALWAYS COPY FILES ON DISK IN THE COPY FILE COMMAND
; September 2024
; --------------------------------------------------------------------------
; CCB
;
; Always copy files on disk in the COPY FILE command.
;
; 2024/9/9, by ccb
;
cmp dword ptr vfpa_sys9169_data,00h
je Label6d6c97
xor eax , eax
Label6d6c97 ::
test eax , eax ;0x006d6c97 : 85c0
jne Label6d6ce6 ;0x006d6c99 : 754b
lea eax , dword ptr [ ebp + 0F8h ] ;0x006d6c9b : 8d85f8000000
push eax ;0x006d6ca1 : 50
push edi ;0x006d6ca2 : 57
call FindFirstFileA ;0x006d6ca3 : ff152c719100
push eax ;0x006d6ca9 : 50
call FindClose ;0x006d6caa : ff1528719100
push ebx ;0x006d6cb0 : 53
push esi ;0x006d6cb1 : 56
push edi ;0x006d6cb2 : 57
call CopyFileA ;0x006d6cb3 : ff1524719100
test eax , eax ;0x006d6cb9 : 85c0
jne Label6d6cc6 ;0x006d6cbb : 7509
pushd 066h ;0x006d6cbd : 6a66
mov ecx , esi ;0x006d6cbf : 8bce
call Fun44d388 ;0x006d6cc1 : e8c266d7ff
Label6d6cc6 ::
mov eax , dword ptr [ ebp + 0F8h ] ;0x006d6cc6 : 8b85f8000000
test al , 01h ;0x006d6ccc : a801
je Label6d6cdb ;0x006d6cce : 740b
and eax , 0FFFFFFFEh ;0x006d6cd0 : 83e0fe
push eax ;0x006d6cd3 : 50
push esi ;0x006d6cd4 : 56
call SetFileAttributesA ;0x006d6cd5 : ff1520719100
Label6d6cdb ::
mov eax , dword ptr [ ebp + 0118h ] ;0x006d6cdb : 8b8518010000
jmp Label6d6ded ;0x006d6ce1 : e907010000
4. APPLIES TO:
VFP 6.0.8167.0
VFP 6.0.8961.0 (SP5)
VFP 7.0.0.9262
VFP 7.0.0.9465 (SP1)
VFP 8.0.0.2521
VFP 8.0.0.3117 (SP1)
VFP 9.0.0.2412
VFP 9.0.0.3504 (SP1)
VFP 9.0.0.4611 (SP2)
VFP 9.0.0.5015 (SP2)
VFP 9.0.0.5411 (SP2)
VFP 9.0.0.5721 (SP2)
VFP 9.0.0.5815 (SP2)
VFP 9.0.0.6303 (SP2)
VFP 9.0.0.6602 (SP2)
VFP 9.0.0.7423 (SP2)
The bug has been fixed in VFP Advanced.
IMPORTANT NOTE:
In vfp9 (and vfp6, vfp7, vfp8), we can use the EXECSCRIPT() function to execute the COPY FILE command to copy files on disk, for example,
=EXECSCRIPT("COPY FILE test.txt TO test2.txt") && it always copies the file test.txt on disk to the destination file test2.txt.
and then there is no the bug.
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfp9fix346.asp
6. OTHER:
For reference only, there is no guarantees.
Any questions or suggestions, please send me an email at ccb2000@163.com.
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