57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#include "IdManager.h"
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#include <sstream>
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bool IdManager::add(const std::string &id) {
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if(!valid(id)) return false;
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return usedIds.insert(id).second;
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}
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bool IdManager::remove(const std::string &id) {
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return (usedIds.erase(id) > 0);
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}
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bool IdManager::valid(const std::string &id) const {
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if(id.empty()) return false;
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if(id[0] >= '0' && id[0] <= '9') return false;
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for(std::string::const_iterator c = id.begin(); c != id.end(); c++) {
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if(!(*c >= '0' && *c <= '9') && !(*c >= 'A' && *c <= 'Z') && !(*c >= 'a' && *c <= 'z')
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&& *c != '_' && *c != '-' && *c != '.')
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return false;
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}
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return true;
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}
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bool IdManager::unique(const std::string &id) const {
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if(!valid(id)) return false;
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return (usedIds.find(id) == usedIds.end());
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}
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std::string IdManager::generate(const std::string &prefix) {
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if(!valid(prefix)) return std::string();
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unsigned long n = 0;
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std::map<std::string, unsigned long>::iterator it = prefixMap.find(prefix);
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if(it != prefixMap.end()) {
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n = it->second + 1;
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prefixMap.erase(it);
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}
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std::ostringstream id;
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do {
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id.str(std::string());
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id << prefix << n++;
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} while(!unique(id.str()));
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prefixMap.insert(std::make_pair<std::string, unsigned long>(prefix, n-1));
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usedIds.insert(id.str());
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return id.str();
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}
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