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annotate ueda/libuschem/schemobj.c @ 152:d41cdd682db5

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m4-fp: support for CUI DS04-254-SMT DIP switch series
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 24 Jun 2021 05:13:16 +0000
parents cd92449fdb51
children
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1 /*
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2 * Schematic object utility functions
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include "schemstruct.h"
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8
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9 schemobj_insert_after(oldobj, newobj)
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10 register struct schemobj *oldobj, *newobj;
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11 {
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12 newobj->obj_next = oldobj->obj_next;
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13 newobj->obj_prev = oldobj;
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14 oldobj->obj_next = newobj;
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15 newobj->obj_next->obj_prev = newobj;
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16 }
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17
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18 schemobj_insert_before(oldobj, newobj)
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19 register struct schemobj *oldobj, *newobj;
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20 {
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21 newobj->obj_next = oldobj;
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22 newobj->obj_prev = oldobj->obj_prev;
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23 oldobj->obj_prev = newobj;
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24 newobj->obj_prev->obj_next = newobj;
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25 }
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26
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27 schemobj_unlink(delobj)
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28 register struct schemobj *delobj;
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29 {
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30 if (!delobj->obj_type) {
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31 fprintf(stderr,
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32 "Fatal internal error: attempt to unlink sentinel object\n");
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33 abort();
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34 }
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35 delobj->obj_prev->obj_next = delobj->obj_next;
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36 delobj->obj_next->obj_prev = delobj->obj_prev;
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37 }