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/** |
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* shstr.h: Shared string class. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in doc/pod/gplicense.pod. |
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* |
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* $Id: shstr.h,v 1.2 2007-09-05 11:23:13 pippijn Exp $ |
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*/ |
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|
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#ifndef SHSTR_H |
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#define SHSTR_H |
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|
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#include <string> |
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#include <vector> |
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#include <iostream> |
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|
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#ifdef WANT_STRLEN |
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# define SHSTRLEN(str) strlen (str) |
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#else |
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# define SHSTRLEN(str) 0 |
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#endif |
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|
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struct shentry |
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{ |
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shentry (char const * const str, const size_t hash) |
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: m_refcnt (0), m_str (str), m_len (SHSTRLEN (str)), m_hash (hash) |
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{ |
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} |
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|
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mutable int m_refcnt; |
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char const * const m_str; |
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size_t m_len; |
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size_t m_hash; |
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}; |
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|
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class shstr |
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{ |
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protected: |
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static size_t m_cnt; |
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|
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static size_t m_bucketcnt; |
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|
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typedef std::vector<shentry *> pairs; |
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|
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static pairs *m_buckets; |
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|
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static shentry *prepare (char const * const str); |
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static bool unref (char const * const str); |
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static const shentry *get (char const * const str); |
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|
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static pairs::iterator find (char const * const str, size_t n); |
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|
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static size_t hash (char const * const str); |
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|
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public: |
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static char const * const insert (char const * const str, size_t *size); |
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|
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static void erase (char const * const str); |
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|
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static size_t bucketcnt () |
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{ |
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return m_bucketcnt; |
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} |
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|
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static size_t refs (char const * const str); |
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static size_t strcnt (); |
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|
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static size_t memused (); |
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|
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static void initbuckets (pairs *buckets) |
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{ |
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m_buckets = buckets; |
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} |
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|
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static void cleanup () |
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{ |
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delete[] m_buckets; |
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} |
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|
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public: |
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typedef size_t size_type; |
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|
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shstr (char const * const str = ""); |
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shstr (const shstr &rhs); |
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~shstr (); |
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|
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char const * const c_str () const; |
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size_type length () const; |
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shstr &operator = (char const * const rhs); |
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shstr &operator = (const shstr &rhs); |
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bool operator == (const shstr &rhs) const; |
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bool operator != (const shstr &rhs) const; |
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|
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friend std::ostream &operator << (std::ostream &os, const shstr &str) |
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{ |
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os << str.m_str; |
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return os; |
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} |
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|
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protected: |
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char const *m_str; |
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size_type m_len; |
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|
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void erase () |
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{ |
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erase (m_str); |
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m_str = NULL; |
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} |
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|
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void insert (char const * const newstr) |
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{ |
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m_str = insert (newstr, &m_len); |
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} |
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}; |
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|
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#endif // SHSTR_H |
