forked from KolibriOS/kolibrios
69 lines
1.8 KiB
PHP
69 lines
1.8 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2014. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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head dd 0
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linkedlist_add:
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push ebx
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mov ebx, [head]
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mov [head], eax
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mov [eax + node.next], ebx
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pop ebx
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ret
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linkedlist_unlink:
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push ebx ecx
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test eax, eax
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jz .invalid_pointer
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mov ebx, eax ; eax - pointer to node for unlink
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cmp eax, [head]
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jz .unlink_head
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.getnext:
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cmp [ebx+node.next], eax
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jz .unlink
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cmp [ebx+node.next], 0
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jz .invalid_pointer
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mov ebx, [ebx+node.next]
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jmp .getnext
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.unlink:
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mov ecx, [eax+node.next]
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mov [ebx+node.next], ecx
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jmp @f
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.unlink_head:
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mov ebx, [eax+node.next]
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mov [head], ebx
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@@:
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.invalid_pointer:
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pop ecx ebx
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ret
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linkedlist_isvalid: ;eax - pointer to check; returns zero if valid
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push ebx ecx
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xor ecx, ecx
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test eax, eax
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jz .invalid_pointer
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mov ebx, [head]
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.next_check:
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cmp eax, ebx
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jz .valid_pointer
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mov ebx, [ebx + node.next]
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test ebx, ebx
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jz .invalid_pointer
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jmp .next_check
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.invalid_pointer:
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inc ecx
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.valid_pointer:
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mov eax, ecx
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pop ecx ebx
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ret
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linkedlist_gethead:
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mov eax, [head]
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ret
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restore node
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restore node.next |