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1 | // -*- mode: cpp; mode: fold -*- | |
2 | // Description /*{{{*/ | |
3 | // $Id: hashsum_template.h,v 1.3 2001/05/07 05:05:47 jgg Exp $ | |
4 | /* ###################################################################### | |
5 | ||
6 | HashSumValueTemplate - Generic Storage for a hash value | |
7 | ||
8 | ##################################################################### */ | |
9 | /*}}}*/ | |
10 | #ifndef APTPKG_HASHSUM_TEMPLATE_H | |
11 | #define APTPKG_HASHSUM_TEMPLATE_H | |
12 | ||
13 | ||
14 | #include <string> | |
15 | #include <cstring> | |
16 | ||
17 | #include <apt-pkg/strutl.h> | |
18 | ||
19 | #ifndef APT_10_CLEANER_HEADERS | |
20 | #include <apt-pkg/fileutl.h> | |
21 | #include <algorithm> | |
22 | #include <stdint.h> | |
23 | #endif | |
24 | #ifndef APT_8_CLEANER_HEADERS | |
25 | using std::string; | |
26 | using std::min; | |
27 | #endif | |
28 | ||
29 | class FileFd; | |
30 | ||
31 | template<int N> | |
32 | class HashSumValue | |
33 | { | |
34 | unsigned char Sum[N/8]; | |
35 | ||
36 | public: | |
37 | ||
38 | // Accessors | |
39 | bool operator ==(const HashSumValue &rhs) const | |
40 | { | |
41 | return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0; | |
42 | } | |
43 | bool operator !=(const HashSumValue &rhs) const | |
44 | { | |
45 | return memcmp(Sum,rhs.Sum,sizeof(Sum)) != 0; | |
46 | } | |
47 | ||
48 | std::string Value() const | |
49 | { | |
50 | char Conv[16] = | |
51 | { '0','1','2','3','4','5','6','7','8','9','a','b', | |
52 | 'c','d','e','f' | |
53 | }; | |
54 | char Result[((N/8)*2)+1]; | |
55 | Result[(N/8)*2] = 0; | |
56 | ||
57 | // Convert each char into two letters | |
58 | int J = 0; | |
59 | int I = 0; | |
60 | for (; I != (N/8)*2; J++,I += 2) | |
61 | { | |
62 | Result[I] = Conv[Sum[J] >> 4]; | |
63 | Result[I + 1] = Conv[Sum[J] & 0xF]; | |
64 | } | |
65 | return std::string(Result); | |
66 | } | |
67 | ||
68 | inline void Value(unsigned char S[N/8]) | |
69 | { | |
70 | for (int I = 0; I != sizeof(Sum); ++I) | |
71 | S[I] = Sum[I]; | |
72 | } | |
73 | ||
74 | inline operator std::string() const | |
75 | { | |
76 | return Value(); | |
77 | } | |
78 | ||
79 | bool Set(std::string Str) | |
80 | { | |
81 | return Hex2Num(Str,Sum,sizeof(Sum)); | |
82 | } | |
83 | ||
84 | inline void Set(unsigned char S[N/8]) | |
85 | { | |
86 | for (int I = 0; I != sizeof(Sum); ++I) | |
87 | Sum[I] = S[I]; | |
88 | } | |
89 | ||
90 | explicit HashSumValue(std::string const &Str) | |
91 | { | |
92 | memset(Sum,0,sizeof(Sum)); | |
93 | Set(Str); | |
94 | } | |
95 | HashSumValue() | |
96 | { | |
97 | memset(Sum,0,sizeof(Sum)); | |
98 | } | |
99 | }; | |
100 | ||
101 | class SummationImplementation | |
102 | { | |
103 | public: | |
104 | virtual bool Add(const unsigned char *inbuf, unsigned long long inlen) = 0; | |
105 | inline bool Add(const char *inbuf, unsigned long long const inlen) | |
106 | { return Add((const unsigned char *)inbuf, inlen); } | |
107 | ||
108 | inline bool Add(const unsigned char *Data) | |
109 | { return Add(Data, strlen((const char *)Data)); } | |
110 | inline bool Add(const char *Data) | |
111 | { return Add((const unsigned char *)Data, strlen(Data)); } | |
112 | ||
113 | inline bool Add(const unsigned char *Beg, const unsigned char *End) | |
114 | { return Add(Beg, End - Beg); } | |
115 | inline bool Add(const char *Beg, const char *End) | |
116 | { return Add((const unsigned char *)Beg, End - Beg); } | |
117 | ||
118 | bool AddFD(int Fd, unsigned long long Size = 0); | |
119 | bool AddFD(FileFd &Fd, unsigned long long Size = 0); | |
120 | }; | |
121 | ||
122 | #endif |