Hi,
I'm really stuck here, meanwhile I made the testing program look exactly
the same in structure like the code sequence in question, forced both to
use AnsiStrings and stared at the assembler code - to no avail, because
I do not understand enough x86 asm. ;)
The string variable is holding the same directory name and path in both
cases, of course. For the code look into my previous mail, please.
Can someone comment on these snippets:
<original>
# [457] fpaccess((*ExpandFileName*) tmp , R_OK);
movl $4,%ebx
movl -192(%ebp),%eax
call FPC_ANSISTR_INCR_REF
leal -520(%ebp),%eax
call FPC_ANSISTR_DECR_REF
movl -192(%ebp),%eax
movl %eax,-520(%ebp)
movl %ebx,%edx
movl -520(%ebp),%eax
testl %eax,%eax
jne .L583
movl $FPC_EMPTYCHAR,%eax
.L583:
call FPC_SYSC_ACCESS
# [458] n := getlastoserror;
call SYSUTILS_GETLASTOSERROR$$LONGINT
movl %eax,-120(%ebp)
# [459] writeln(n);
call fpc_get_output
</original>
<test>
# [11] res := fpaccess(tmp, R_OK);
movl $4,%ebx
movl U_P$STAT_TMP,%eax
call FPC_ANSISTR_INCR_REF
leal -44(%ebp),%eax
call FPC_ANSISTR_DECR_REF
movl U_P$STAT_TMP,%eax
movl %eax,-44(%ebp)
movl %ebx,%edx
movl -44(%ebp),%eax
testl %eax,%eax
jne .L24
movl $FPC_EMPTYCHAR,%eax
.L24:
call FPC_SYSC_ACCESS
movw %ax,U_P$STAT_RES
# [13] res := getlastoserror;
call SYSUTILS_GETLASTOSERROR$$LONGINT
movw %ax,U_P$STAT_RES
# [14] writeln(res);
</test>
For me the look structurally identical, but some differences like the
$XXX-variables(?) don't.
Marc
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