Last change
on this file since 666 was
666,
checked in by mmc, 17 years ago
|
Added voronoi code, which is currently used by the nanovis server
to generate triangular meshes for point clouds.
|
File size:
1.1 KB
|
Line | |
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1 | |
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2 | /*** MEMORY.C ***/ |
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3 | |
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4 | #include <stdio.h> |
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5 | #include <stdlib.h> /* malloc(), exit() */ |
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6 | |
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7 | #include "vdefs.h" |
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8 | |
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9 | extern int sqrt_nsites, siteidx ; |
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10 | |
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11 | void |
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12 | freeinit(Freelist * fl, int size) |
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13 | { |
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14 | fl->head = (Freenode *)NULL ; |
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15 | fl->nodesize = size ; |
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16 | } |
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17 | |
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18 | char * |
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19 | getfree(Freelist * fl) |
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20 | { |
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21 | int i ; |
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22 | Freenode * t ; |
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23 | if (fl->head == (Freenode *)NULL) |
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24 | { |
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25 | t = (Freenode *) myalloc(sqrt_nsites * fl->nodesize) ; |
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26 | for(i = 0 ; i < sqrt_nsites ; i++) |
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27 | { |
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28 | makefree((Freenode *)((char *)t+i*fl->nodesize), fl) ; |
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29 | } |
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30 | } |
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31 | t = fl->head ; |
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32 | fl->head = (fl->head)->nextfree ; |
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33 | return ((char *)t) ; |
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34 | } |
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35 | |
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36 | void |
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37 | makefree(Freenode * curr, Freelist * fl) |
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38 | { |
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39 | curr->nextfree = fl->head ; |
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40 | fl->head = curr ; |
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41 | } |
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42 | |
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43 | int total_alloc ; |
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44 | |
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45 | char * |
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46 | myalloc(unsigned n) |
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47 | { |
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48 | char * t ; |
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49 | if ((t=malloc(n)) == (char *) 0) |
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50 | { |
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51 | fprintf(stderr,"Insufficient memory processing site %d (%d bytes in use)\n", |
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52 | siteidx, total_alloc) ; |
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53 | exit(0) ; |
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54 | } |
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55 | total_alloc += n ; |
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56 | return (t) ; |
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57 | } |
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