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0
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1 #include "signature.h"
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2
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3 void init_signature_bits() {
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4 bzero(signature, sizeof(signature));
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5 }
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6
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7 void init_signature1_bits() {
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8 bzero(signature1, sizeof(signature1));
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9 }
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10
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11 void init_signature2_bits() {
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12 bzero(signature2, sizeof(signature2));
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13 }
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14
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3
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15 int _get_signature_bit(char *s, int lim, int n) {
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0
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16 int byte = n >> 3;
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17 int bit = n & 7;
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18
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19 #ifdef DEBUG
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3
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20 if (byte < 0 || byte >= lim)
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21 fprintf(stderr, "get_signature_bit?(): index out of range\n");
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0
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22 #endif
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23
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3
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24 return (s[byte] & (1 << bit)) >> bit;
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25 }
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26
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27 int get_signature_bit(int n) {
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28 return _get_signature_bit(signature, NSIGNATURE, n);
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29 }
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30
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31 int get_signature1_bit(int n) {
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32 return _get_signature_bit(signature1, NSIGNATURE, n);
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0
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33 }
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34
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35 int get_signature2_bit(int n) {
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3
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36 return _get_signature_bit(signature2, NSIGNATURE, n);
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0
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37 }
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38
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3
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39 void _set_signature_bit(char *s, int lim, int n, int v) {
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0
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40 int byte = n >> 3;
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41 int bit = n & 7;
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42
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43 #ifdef DEBUG
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3
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44 if (byte < 0 || byte >= limit / 8)
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45 fprintf(stderr, "get_signature_bit?(): index out of range\n");
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0
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46 #endif
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47
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48 if (v)
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3
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49 s[byte] |= (1 << bit);
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0
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50 else
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3
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51 s[byte] &= ~(1 << bit);
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52 }
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53
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54 void set_signature_bit(int n, int v) {
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55 _set_signature_bit(signature, NSIGNATURE, n, v);
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56 }
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57
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58 void set_signature1_bit(int n, int v) {
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59 _set_signature_bit(signature1, NSIGNATURE, n, v);
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0
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60 }
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61
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62 void set_signature2_bit(int n, int v) {
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3
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63 _set_signature_bit(signature2, NSIGNATURE, n, v);
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64 }
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65
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66 int _binstr_to_sig(const char *binstr, char *sig, int *bytes, int *bits) {
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67 int n = strlen(binstr);
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68 int i;
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0
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69
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3
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70 for (i = 0; i < n; i++) {
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71 if (binstr[i] == '0')
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72 _set_signature_bit(sig, NSIGNATURE, i, 0);
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73 else if (binstr[i] == '1')
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74 _set_signature_bit(sig, NSIGNATURE, i, 1);
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75 else
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76 return 0;
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77 }
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0
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78
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3
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79 *bytes = (n % 8 > 0) ? n / 8 + 1 : n / 8;
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80 *bits = n;
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81
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82 return 1;
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83 }
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84
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85 int binstr_to_sig(const char *binstr) {
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86 _binstr_to_sig(binstr, signature, &n_signature, &nbit_signature);
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0
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87 }
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88
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3
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89 int binstr_to_sig1(const char *binstr) {
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90 _binstr_to_sig(binstr, signature1, &n_signature1, &nbit_signature1);
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91 }
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92
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93 int binstr_to_sig2(const char *binstr) {
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94 _binstr_to_sig(binstr, signature2, &n_signature2, &nbit_signature2);
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95 }
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96
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97 int _sig_to_binstr(char *binstr, char *sig, int bits) {
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98 int i;
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99
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100 for (i = 0; i < bits; i++)
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101 binstr[i] = _get_signature_bit(sig, NSIGNATURE, i) ? '1' : '0';
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102
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103 binstr[bits] = '\0';
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104
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105 return 1;
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106 }
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107
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108 int sig_to_binstr(char *binstr) {
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109 return _sig_to_binstr(binstr, signature, nbit_signature);
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110 }
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111
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112 int sig1_to_binstr(char *binstr) {
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113 return _sig_to_binstr(binstr, signature1, nbit_signature1);
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114 }
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115
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116 int sig2_to_binstr(char *binstr) {
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117 return _sig_to_binstr(binstr, signature2, nbit_signature2);
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118 }
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