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annotate ueda/libuschem/compinst.c @ 12:51893347bc42

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unet-bind implementation started
author Space Falcon <falcon@ivan.Harhan.ORG>
date Sat, 01 Aug 2015 23:33:05 +0000
parents cd92449fdb51
children
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1 /*
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2 * Component instance hash table logic
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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 <strings.h>
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8 #include "schemstruct.h"
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9
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10 extern char *malloc();
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11
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12 #define HASH_SIZE 1103
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13
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14 static int
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15 hash_instname(str)
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16 char *str;
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17 {
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18 register u_long accum;
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19 register char *cp;
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20 register int c;
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21
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22 for (cp = str, accum = 0; c = *cp; cp++) {
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23 accum <<= 4;
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24 accum |= c & 0x0F;
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25 }
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26 return(accum % HASH_SIZE);
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27 }
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28
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29 hash_component_instances(schem)
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30 struct schem *schem;
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31 {
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32 struct schemobj **hashtab;
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33 register struct schemobj *obj, *hc, **hcp;
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34 int errflag = 0, errstat = 0;
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35
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36 hashtab = (struct schemobj **)
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37 malloc(sizeof(struct schemobj *) * HASH_SIZE);
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38 if (!hashtab) {
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39 perror("malloc");
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40 exit(1);
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41 }
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42 bzero(hashtab, sizeof(struct schemobj *) * HASH_SIZE);
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43
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44 for (obj = schem->obj_next; obj != (struct schemobj *)schem;
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45 obj = obj->obj_next) {
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46 if (obj->obj_type != OBJTYPE_COMPINST)
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47 continue;
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48 hcp = hashtab + hash_instname(obj->compobj_instname);
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49 for (; hc = *hcp; hcp = &hc->compobj_nextinhash)
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50 if (!strcmp(obj->compobj_instname, hc->compobj_instname)) {
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51 fprintf(stderr,
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52 "%s: %s: duplicate component instance name (line %d, line %d)\n",
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53 schem->orig_filename, obj->compobj_instname,
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54 hc->obj_lineno, obj->obj_lineno);
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55 errflag = 1;
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56 break;
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57 }
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58 if (errflag) {
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59 errflag = 0;
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60 errstat = -1;
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61 } else
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62 *hcp = obj;
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63 }
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64 schem->compinst_hash = hashtab;
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65 return(errstat);
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66 }
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67
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68 report_compinst_hash_quality(schem)
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69 struct schem *schem;
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70 {
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71 struct schemobj **hashtab;
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72 int maxchain, total;
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73 register int hb, curchain;
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74 register struct schemobj *obj;
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75
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76 hashtab = schem->compinst_hash;
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77 for (hb = 0, total = maxchain = 0; hb < HASH_SIZE; hb++) {
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78 for (obj = hashtab[hb], curchain = 0; obj;
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79 obj = obj->compobj_nextinhash) {
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80 curchain++;
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81 total++;
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82 }
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83 if (curchain > maxchain)
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84 maxchain = curchain;
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85 }
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86 printf("%s: %d component instances total, longest hash chain is %d\n",
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87 schem->orig_filename, total, maxchain);
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88 }
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89
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90 struct schemobj *
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91 find_component_instance(schem, instname)
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92 struct schem *schem;
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93 register char *instname;
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94 {
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95 register struct schemobj *obj;
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96
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97 for (obj = schem->compinst_hash[hash_instname(instname)]; obj;
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98 obj = obj->compobj_nextinhash)
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99 if (!strcmp(obj->compobj_instname, instname))
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100 return(obj);
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101 return(NULL);
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102 }