62 lines
1.5 KiB
Plaintext
62 lines
1.5 KiB
Plaintext
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; ################################################################
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; # #
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; # Copyright 2001, 2008 Fidelity Information Services, Inc #
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; # #
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; # This source code contains the intellectual property #
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; # of its copyright holder(s), and is made available #
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; # under a license. If you do not know the terms of #
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; # the license, please stop and do not read further. #
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; # #
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; ################################################################
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.title OP_EQUNUL "Compare mval to null string"
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mval$def
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$linkage_section
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a_undef_inhibit:
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.address undef_inhibit
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$code_section
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$routine OP_EQUNUL, entry=OP_EQUNUL_CA, kind=null
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.base r27, $ls
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mv_if_notdefined (r0), 30$
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mv_if_notstring (r0), 20$
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ldl r28, mval$l_strlen(r0)
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bne r28, 20$
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; Mval is a null string
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10$: mov 1, r24
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ret r26
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; Mval is not a null string
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20$: clr r24
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ret r26
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; If undef_inhibit is set, then all undefined values are equal to the null string:
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30$: ldq r28, a_undef_inhibit
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ldq_u r24, (r28)
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extbl r24, r28, r24
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bne r24, 10$ ; it's set; treat mval as a null string
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; It's not set, so issue a message:
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lda sp, -8(sp) ; but first,
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stq r26, (sp) ; save the return address
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mov r0, r16
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$call UNDERR, args=<r16>, set_arg_info=false, nonstandard=true
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ldq r26, (sp) ; restore our return address
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lda sp, 8(sp)
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ret r26
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$end_routine
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.end
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