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annotate ueda/uschem-netlist/nets.c @ 16:65a515c20db8

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unet-bind: starpoint entry implemented
author Space Falcon <falcon@ivan.Harhan.ORG>
date Sun, 02 Aug 2015 01:12:18 +0000
parents cd92449fdb51
children
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1 /*
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2 * Working with struct net objects (netheads)
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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 "netlist.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 struct net *named_net_hash[HASH_SIZE];
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15 int total_named_nets;
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16
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17 struct net **sorted_named_nets;
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18
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19 struct net *unnamed_net_list;
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20 int total_unnamed_nets;
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21
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22 struct net noconnect_pseudo_net = {"NO_CONNECT", NULL, 0, NULL};
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23
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24 static int
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25 hash_netname(str)
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26 char *str;
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27 {
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28 register u_long accum = 0;
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29 register char *cp;
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30 register int c, i;
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31
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32 for (cp = str, i = 1; c = *cp; cp++, i++)
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33 accum += c * i;
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34 return(accum % HASH_SIZE);
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35 }
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36
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37 struct net *
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38 alloc_nethead()
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39 {
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40 register struct net *n;
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41
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42 n = (struct net *) malloc(sizeof(struct net));
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43 if (!n) {
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44 perror("malloc");
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45 exit(1);
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46 }
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47 bzero(n, sizeof(struct net));
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48 return(n);
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49 }
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50
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51 struct net *
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52 get_nethead_for_netname(netname)
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53 register char *netname;
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54 {
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55 register struct net *n, **np;
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56
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57 for (np = named_net_hash + hash_netname(netname); n = *np;
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58 np = &n->next)
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59 if (!strcmp(n->netname, netname))
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60 return(n);
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61 n = alloc_nethead();
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62 n->netname = netname;
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63 *np = n;
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64 total_named_nets++;
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65 return(n);
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66 }
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67
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68 report_named_net_hash_quality()
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69 {
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70 int maxchain;
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71 register int hb, curchain;
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72 register struct net *n;
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73
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74 for (hb = 0, maxchain = 0; hb < HASH_SIZE; hb++) {
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75 for (n = named_net_hash[hb], curchain = 0; n; n = n->next)
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76 curchain++;
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77 if (curchain > maxchain)
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78 maxchain = curchain;
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79 }
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80 printf("Total named nets: %d\n", total_named_nets);
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81 printf("Longest hash chain: %d\n", maxchain);
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82 }
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83
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84 named_net_forall(callback)
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85 int (*callback)();
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86 {
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87 register struct net *n, **hb;
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88 register int i;
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89
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90 for (hb = named_net_hash, i = 0; i < HASH_SIZE; hb++, i++)
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91 for (n = *hb; n; n = n->next)
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92 callback(n);
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93 }
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94
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95 static
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96 netname_sort_compare(net1, net2)
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97 struct net **net1, **net2;
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98 {
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99 return(strcmp((*net1)->netname, (*net2)->netname));
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100 }
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101
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102 sort_named_nets()
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103 {
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104 register struct net *n, **hb, **op;
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105 register int i;
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106
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107 sorted_named_nets =
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108 (struct net **) malloc(sizeof(struct net *) * total_named_nets);
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109 if (!sorted_named_nets) {
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110 perror("malloc");
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111 exit(1);
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112 }
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113 op = sorted_named_nets;
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114 for (hb = named_net_hash, i = 0; i < HASH_SIZE; hb++, i++)
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115 for (n = *hb; n; n = n->next)
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116 *op++ = n;
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117 qsort(sorted_named_nets, total_named_nets, sizeof(struct net *),
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118 netname_sort_compare);
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119 }
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120
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121 add_unnamed_net(n)
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122 register struct net *n;
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123 {
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124 n->next = unnamed_net_list;
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125 unnamed_net_list = n;
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126 total_unnamed_nets++;
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127 }