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1 files changed, 267 insertions, 0 deletions

diff --git a/fixedstring.h b/fixedstring.h
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+/*
+ *  Quackle -- Crossword game artificial intelligence and analysis tool
+ *  Copyright (C) 2005-2006 Jason Katz-Brown and John O'Laughlin.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
+ *  02110-1301  USA
+ */
+
+#ifndef QUACKLE_FIXEDSTRING_H
+#define QUACKLE_FIXEDSTRING_H
+
+#include <cassert>
+#include <string>
+#include <string.h>
+
+#define FIXED_STRING_MAXIMUM_LENGTH 40
+
+namespace Quackle
+{
+
+class FixedLengthString 
+{
+  public:
+    typedef char* iterator;
+    typedef const char* const_iterator;
+    typedef unsigned int size_type;
+    typedef char& reference;
+    typedef const char& const_reference;
+
+    FixedLengthString();
+    FixedLengthString(const char* s, size_type n);
+    FixedLengthString(size_type n, char c);
+    FixedLengthString(const char* s);
+    FixedLengthString(const FixedLengthString& s);
+
+    const_iterator begin() const;
+    const_iterator end() const;
+    iterator begin();
+    iterator end();
+    void erase(const iterator i);
+    size_type length() const;
+    FixedLengthString substr(size_type pos, size_type n) const;
+    bool empty() const;
+    size_type size() const { return length(); }
+    void clear() { m_end = m_data; }
+    void push_back(char c);
+
+    int compare(const FixedLengthString& s) const;
+
+    FixedLengthString& operator+=(char c);
+    FixedLengthString& operator+=(const FixedLengthString& s);
+
+    const_reference operator[](size_type n) const { return m_data[n]; }
+    FixedLengthString& operator=(const FixedLengthString &s);
+
+    static const unsigned int maxSize = FIXED_STRING_MAXIMUM_LENGTH;
+
+  private:
+    static const std::string dummyString; // just to get to traits
+    char m_data[maxSize];
+    char* m_end; // points at the terminating NULL
+};
+
+
+inline FixedLengthString
+operator+(const FixedLengthString &lhs, const FixedLengthString& rhs)
+{
+    FixedLengthString str(lhs);
+    str += rhs;
+    return str;
+}
+
+inline FixedLengthString
+operator+(char lhs, const FixedLengthString& rhs)
+{
+    FixedLengthString str(1, lhs);
+    str += rhs;
+    return str;
+}
+
+inline FixedLengthString
+operator+(const FixedLengthString &lhs, char rhs)
+{
+    FixedLengthString str(lhs);
+    str += rhs;
+    return str;
+}
+
+inline
+FixedLengthString::FixedLengthString()
+    : m_end(m_data)
+{
+}
+
+inline
+FixedLengthString::FixedLengthString(const char* s, size_type n)
+{
+    assert(n < maxSize);
+    memcpy(m_data, s, n);
+    m_end = m_data + n;
+}
+
+inline
+FixedLengthString::FixedLengthString(size_type n, char c)
+    : m_end(m_data)
+{
+    assert(n < maxSize);
+    for (unsigned int i = 0; i < n; ++i) {
+	*m_end++ = c;
+    }
+}
+
+inline
+FixedLengthString::FixedLengthString(const char* s)
+{
+    unsigned int sz = strlen(s);
+    assert(sz < maxSize);
+    memcpy(m_data, s, sz);
+    m_end = m_data + sz;
+}
+
+inline
+FixedLengthString::FixedLengthString(const FixedLengthString& s)
+{
+    int sz = s.size();
+    memcpy(m_data, s.m_data, sz);
+    m_end = m_data + sz;
+}
+
+inline FixedLengthString & 
+FixedLengthString::operator=(const FixedLengthString &s)
+{
+    int sz = s.size();
+    memcpy(m_data, s.m_data, sz);
+    m_end = m_data + sz;
+    return *this;
+}
+
+inline FixedLengthString::const_iterator
+FixedLengthString::begin() const
+{
+    return m_data;
+}
+
+inline FixedLengthString::const_iterator
+FixedLengthString::end() const
+{
+    return m_end;
+}
+
+inline FixedLengthString::iterator
+FixedLengthString::begin()
+{
+    return m_data;
+}
+
+inline FixedLengthString::iterator
+FixedLengthString::end()
+{
+    return m_end;
+}
+
+inline void
+FixedLengthString::erase(const iterator i)
+{
+    memmove(i, i+1, m_end - i);
+    --m_end;
+}
+
+inline FixedLengthString::size_type
+FixedLengthString::length() const
+{
+    return m_end - m_data;
+}
+
+inline FixedLengthString
+FixedLengthString::substr(size_type pos, size_type n) const
+{
+    assert(pos + n <= size());
+    return FixedLengthString(&m_data[pos], n);
+}
+
+inline bool
+FixedLengthString::empty() const
+{
+    return length() == 0;
+}
+
+inline FixedLengthString & 
+FixedLengthString::operator+=(char c)
+{
+    assert(size() < maxSize - 1);
+    *m_end++ = c;
+    return *this;
+}
+
+inline FixedLengthString & 
+FixedLengthString::operator+=(const FixedLengthString& s)
+{
+    int sz = s.size();
+    assert(size() + sz < maxSize);
+    memcpy(m_end, s.m_data, sz);
+    m_end += sz;
+    return *this;
+}
+
+inline void
+FixedLengthString::push_back(char c)
+{
+    *this += c;
+}
+
+inline int
+FixedLengthString::compare(const FixedLengthString& s) const
+{
+    int size1 = size();
+    int size2 = s.size();
+    int sz = (size1 < size2) ? size1 : size2;
+    for (int i = 0; i < sz; ++i) {
+	if (m_data[i] < s.m_data[i]) {
+	    return -1;
+	} else if (m_data[i] > s.m_data[i]) {
+	    return 1;
+	}
+    }
+    if (size1 > size2) {
+	return 1;
+    } else if (size2 > size1) {
+	return -1;
+    }
+    return 0;
+}
+
+inline bool
+operator<(const Quackle::FixedLengthString &lhs, const Quackle::FixedLengthString& rhs)
+{
+    return (lhs.compare(rhs) < 0);
+}
+
+
+} // end namespace
+
+inline bool
+operator==(const Quackle::FixedLengthString &lhs, const Quackle::FixedLengthString& rhs)
+{
+    return (lhs.compare(rhs) == 0);
+}
+
+inline bool
+operator!=(const Quackle::FixedLengthString &lhs, const Quackle::FixedLengthString& rhs)
+{
+    return (lhs.compare(rhs) != 0);
+}
+
+#endif