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/*
* uservars.h
*
* This file is a part of NSIS.
*
* Copyright (C) 2003 Ramon
* Copyright (C) 2003-2018 NSIS Contributors
*
* Licensed under the zlib/libpng license (the "License");
* you may not use this file except in compliance with the License.
*
* Licence details can be found in the file COPYING.
*
* This software is provided 'as-is', without any express or implied
* warranty.
*
* Doxygen comments by Jim Park -- 07/25/2007
*/
#ifndef ___USERVARS___H_____
#define ___USERVARS___H_____
#include "lang.h"
struct uservarstring {
int name;
int index;
int pos;
int reference;
};
class UserVarsStringList : public SortedStringListND<struct uservarstring>
{
public:
/* Default constructor */
UserVarsStringList() : m_index(0) {}
/* Destructor */
virtual ~UserVarsStringList() {}
/**
* Adds a name to the UserVarsStringList. Sets reference count to
* ref_count.
*
* @param name The User variable string to store.
* @param ref_count The reference count to store. Default is 0.
* @return The index of the added variable string.
*/
int add(const TCHAR *name, int ref_count = 0 )
{
int pos=SortedStringListND<struct uservarstring>::add(name);
if (pos == -1) return -1;
uservarstring* ustr = ((uservarstring*) m_gr.get()) + pos;
ustr->index = m_index;
ustr->pos = pos;
ustr->reference = ref_count;
int temp = m_index;
m_index++;
return temp;
}
/**
* Get the index of the string that matches 'name.'
*
* @param name The name of the string to search for.
* @param n_chars If -1, match entire string, otherwise compare only
* n_chars worth of characters.
* @return The index position of the structure where structure.name ==
* name.
*/
int get(const TCHAR *name, int n_chars = -1) const
{
int v = SortedStringListND<struct uservarstring>::find(name, n_chars);
if (v == -1) return -1;
return (((struct uservarstring*) m_gr.get())[v].index);
}
/**
* Get count of strings.
*
* @return The count of strings.
*/
int getnum() const
{
return m_index;
}
/**
* Given the index of the structure, return the reference count.
*
* @return The reference count of the nth uservarstring structure.
* If not found, returns -1.
*/
int get_reference(int idx) const
{
int pos=get_internal_idx(idx);
if (pos==-1) return -1;
return (((struct uservarstring*) m_gr.get())[pos].reference);
}
/**
* Given the index of the structure, increment the reference count.
*
* @return The previous reference count (before the increment).
* If not found, returns -1.
*/
int inc_reference(int idx)
{
int pos=get_internal_idx(idx);
if (pos==-1) return -1;
return ((struct uservarstring*) m_gr.get())[pos].reference++;
}
/**
* Given the index of the structure, return the string value
* of the name.
*
* @return String value of the name as TCHAR*.
* If not found, returns NULL.
*/
TCHAR *idx2name(int idx)
{
int pos=get_internal_idx(idx);
if (pos==-1) return NULL;
struct uservarstring *data=(struct uservarstring *) m_gr.get();
return ((TCHAR*) m_strings.get() + data[pos].name);
}
private:
int m_index;
int get_internal_idx(int idx) const
{
struct uservarstring *data=(struct uservarstring *) m_gr.get();
for (int i = 0; i < m_index; i++)
{
if (data[i].index == idx)
{
return i;
}
}
return -1;
}
};
#endif
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