Empty string: Difference between revisions
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</pre> |
</pre> |
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=={{header|X86-64 Assembly}}== |
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===UASM 2.52=== |
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<lang asm> |
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option casemap:none |
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printf proto :qword, :VARARG |
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exit proto :dword |
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.data |
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e_str db 1 dup (0) |
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.code |
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main proc |
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xor rcx, rcx |
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lea rax, e_str |
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cmp byte ptr [rax+rcx],0 ;; Is e_str[0] equal to 0? |
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je _isempty ;; Yes so goto isEmpty |
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jne _notempty ;; No, got notEmpty |
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jmp _exit ;; Neither condition is met, so exit. |
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_isempty: |
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invoke printf, CSTR("e_str is empty",10) |
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lea rax, e_str |
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mov byte ptr [rax+0], 's' ;; Copy a char into e_str[0] |
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jmp main ;; Test again.. |
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_notempty: |
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invoke printf, CSTR("e_str is NOT empty",10) |
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;; Fall though to exit here.. |
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_exit: |
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xor rsi, rsi |
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call exit |
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ret |
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main endp |
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end |
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</lang> |
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{{out}} |
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<pre> |
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e_str is empty |
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e_str is NOT empty |
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</pre> |
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=={{header|XLISP}}== |
=={{header|XLISP}}== |
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<code>STRING-NULL?</code> returns true if its argument is a string of length zero. In a REPL: |
<code>STRING-NULL?</code> returns true if its argument is a string of length zero. In a REPL: |
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