[7] | 1 | |
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| 2 | /* |
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| 3 | Copyright 2013 Willem Vermin, SURFsara |
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| 4 | |
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| 5 | Licensed under the Apache License, Version 2.0 (the "License"); |
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| 6 | you may not use this file except in compliance with the License. |
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| 7 | You may obtain a copy of the License at |
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| 8 | |
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| 9 | http://www.apache.org/licenses/LICENSE-2.0 |
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| 10 | |
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| 11 | Unless required by applicable law or agreed to in writing, software |
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| 12 | distributed under the License is distributed on an "AS IS" BASIS, |
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| 13 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 14 | See the License for the specific language governing permissions and |
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| 15 | limitations under the License. |
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| 16 | */ |
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| 17 | #ifndef STOPOS_KEY_H |
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| 18 | #define STOPOS_KEY_H |
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| 19 | #include <string> |
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| 20 | #include <iostream> |
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| 21 | #include "stopos.h" |
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| 22 | |
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| 23 | class stopos_key |
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| 24 | { |
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| 25 | protected: |
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| 26 | std::string value; |
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| 27 | std::string slot; |
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| 28 | static const char firstchar = 'a'; |
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| 29 | static const char lastchar = 'z'; |
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| 30 | static const unsigned int base = lastchar - firstchar + 1; |
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| 31 | template <typename T> void tostring1(std::string &v,const T n) |
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| 32 | { |
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| 33 | if (n == 0) |
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| 34 | return; |
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| 35 | unsigned int c = n + firstchar - base*(n/base); |
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| 36 | tostring1(v,n/base); |
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| 37 | v.push_back(c); |
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| 38 | } |
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| 39 | template <typename T> void tostring(std::string &v,const T n) |
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| 40 | { |
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| 41 | if (n == 0) |
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| 42 | v = firstchar; |
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| 43 | else |
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| 44 | tostring1(v,n); |
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| 45 | } |
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| 46 | public: |
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| 47 | stopos_key(); |
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| 48 | stopos_key(const std::string &s); |
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| 49 | void increment(void); |
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| 50 | std::string str(void) const; |
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| 51 | std::string get_key(void) const; |
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| 52 | std::string get_slot(void) const; |
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| 53 | void set_key(const std::string &k){ this->value = k;} |
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| 54 | void set_slot(const std::string &s){ this->slot = s;} |
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| 55 | void impossible(); |
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| 56 | bool operator==(const stopos_key &k) const; |
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| 57 | bool operator!=(const stopos_key &k) const; |
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| 58 | |
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| 59 | // to assign an unsigned integer value to a key |
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| 60 | template <typename T> void set(const T k,const std::string &slot) |
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| 61 | { |
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| 62 | this->value = ""; |
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| 63 | this->tostring(this->value,k); |
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| 64 | this->slot = slot; |
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| 65 | return; |
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| 66 | } |
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| 67 | |
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| 68 | // to get the unsigned integer value from a key |
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| 69 | template <typename T> T get() const |
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| 70 | { |
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| 71 | T r = 0; |
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| 72 | |
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| 73 | for (unsigned int i=0; i<this->value.size(); i++) |
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| 74 | r = this->base*r + this->value[i]-this->firstchar; |
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| 75 | |
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| 76 | return r; |
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| 77 | } |
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| 78 | |
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| 79 | static longuint KeyToNumber(const std::string s) |
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| 80 | { |
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| 81 | longuint r = 0; |
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| 82 | stopos_key d; |
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| 83 | for (unsigned int i=0; i<s.size(); i++) |
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| 84 | r = base*r + s[i]-firstchar; |
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| 85 | |
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| 86 | return r; |
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| 87 | } |
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| 88 | |
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| 89 | template <typename T> static std::string NumberToKey(const T n) |
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| 90 | { |
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| 91 | std::string s; |
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| 92 | stopos_key k; |
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| 93 | k.tostring(s,n); |
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| 94 | return s; |
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| 95 | } |
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| 96 | }; |
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| 97 | #endif |
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