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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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15 int get_signature_bit(int n) {
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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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20 if (byte < 0 || byte >= NSIGNATURE)
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21 fprintf(stderr, "get_signature_bit(): index out of range\n");
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22 #endif
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23
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24 return (signature[byte] & (1 << bit)) >> bit;
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25 }
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26
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27 int get_signature1_bit(int n) {
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28 int byte = n >> 3;
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29 int bit = n & 7;
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30
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31 #ifdef DEBUG
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32 if (byte < 0 || byte >= NSIGNATURE)
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33 fprintf(stderr, "get_signature1_bit(): index out of range\n");
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34 #endif
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35
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36 return (signature1[byte] & (1 << bit)) >> bit;
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37 }
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38
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39 int get_signature2_bit(int n) {
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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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44 if (byte < 0 || byte >= NSIGNATURE)
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45 fprintf(stderr, "get_signature2_bit(): index out of range\n");
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46 #endif
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47
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48 return (signature2[byte] & (1 << bit)) >> bit;
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49 }
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50
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51 void set_signature_bit(int n, int v) {
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52 int byte = n >> 3;
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53 int bit = n & 7;
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54
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55 #ifdef DEBUG
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56 if (byte < 0 || byte >= NSIGNATURE)
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57 fprintf(stderr, "get_signature_bit(): index out of range\n");
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58 #endif
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59
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60 if (v)
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61 signature[byte] |= (1 << bit);
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62 else
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63 signature[byte] &= ~(1 << bit);
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64 }
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65
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66 void set_signature1_bit(int n, int v) {
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67 int byte = n >> 3;
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68 int bit = n & 7;
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69
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70 #ifdef DEBUG
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71 if (byte < 0 || byte >= NSIGNATURE)
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72 fprintf(stderr, "get_signature1_bit(): index out of range\n");
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73 #endif
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74
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75 if (v)
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76 signature1[byte] |= (1 << bit);
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77 else
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78 signature1[byte] &= ~(1 << bit);
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79 }
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80
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81 void set_signature2_bit(int n, int v) {
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82 int byte = n >> 3;
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83 int bit = n & 7;
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84
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85 #ifdef DEBUG
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86 if (byte < 0 || byte >= NSIGNATURE)
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87 fprintf(stderr, "get_signature2_bit(): index out of range\n");
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88 #endif
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89
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90 if (v)
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91 signature2[byte] |= (1 << bit);
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92 else
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93 signature2[byte] &= ~(1 << bit);
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94 }
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95
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