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added "const char *Read()" returning pointer to statis buffer (in wxConfig

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implementation at least), code common to wxRegConfig and wxFileConfig moved
to config.cpp


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
1998-05-26 15:02:58 +00:00
parent 824e935add
commit 855e92a8d9
2 changed files with 178 additions and 26 deletions
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82
include/wx/config.h
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@@ -19,7 +19,7 @@
/// shall we be case sensitive in parsing variable names?
#ifndef APPCONF_CASE_SENSITIVE
#define APPCONF_CASE_SENSITIVE FALSE
#define APPCONF_CASE_SENSITIVE false
#endif
/// separates group and entry names
@@ -34,19 +34,24 @@
/// should we use registry instead of configuration files under Win32?
#ifndef APPCONF_WIN32_NATIVE
#define APPCONF_WIN32_NATIVE TRUE
#define APPCONF_WIN32_NATIVE true
#endif
// ----------------------------------------------------------------------------
// global functions
// various helper global functions
// ----------------------------------------------------------------------------
/*
Replace environment variables ($SOMETHING) with their values. The format is
$VARNAME or ${VARNAME} where VARNAME contains alphanumeric characters and
'_' only. '$' must be escaped ('\$') in order to be taken literally.
*/
wxString ExpandEnvVars(const wxString& str);
*/
extern wxString ExpandEnvVars(const wxString& str);
/*
Split path into parts removing '..' in progress
*/
extern void SplitPath(wxArrayString& aParts, const char *sz);
// ----------------------------------------------------------------------------
// abstract base class wxConfig which defines the interface for derived classes
@@ -61,6 +66,14 @@ wxString ExpandEnvVars(const wxString& str);
class wxConfig
{
public:
// static functions
// sets the config object, returns the previous pointer
static wxConfig *Set(wxConfig *pConfig);
// get the config object, creates it on demand
static wxConfig *Get() { if ( !ms_pConfig ) Create(); return ms_pConfig; }
// create a new config object
static void Create();
// ctor & virtual dtor
wxConfig() { }
virtual ~wxConfig();
@@ -82,24 +95,32 @@ public:
virtual bool GetFirstEntry(wxString& str, long& lIndex) = 0;
virtual bool GetNextEntry (wxString& str, long& lIndex) = 0;
// key access
// read a string or long value from the key. If the key is not
// found the default value is returned.
virtual const char *Read(const char *szKey,
const char *szDefault = NULL) const = 0;
virtual long Read(const char *szKey, long lDefault) const = 0;
// key access: returns TRUE if value was really read, FALSE if default used
// (and if the key is not found the default value is returned.)
// read a string from the key
virtual bool Read(wxString *pStr, const char *szKey,
const char *szDefault = NULL) const = 0;
// another version using statis buffer - it means it will be overwritten
// after each call to this function!
virtual const char *Read(const char *szKey,
const char *szDefault = NULL) const;
// the same for longs
long Read(const char *szKey, long lDefault) const
{ long l; Read(&l, szKey, lDefault); return l; }
// and another version: returns true if default value is returned
virtual bool Read(long *pl, const char *szKey, long lDefault = 0) const = 0;
// write the value (return true on success)
virtual bool Write(const char *szKey, const char *szValue) = 0;
virtual bool Write(const char *szKey, long lValue) = 0;
// permanently writes all changes
virtual bool Flush(bool bCurrentOnly = FALSE) = 0;
virtual bool Flush(bool bCurrentOnly = false) = 0;
// delete entries/groups
// deletes the specified entry and the group it belongs to if
// it was the last key in it and the second parameter is true
virtual bool DeleteEntry(const char *szKey,
bool bDeleteGroupIfEmpty = TRUE) = 0;
bool bDeleteGroupIfEmpty = true) = 0;
// delete the group (with all subgroups)
virtual bool DeleteGroup(const char *szKey) = 0;
// delete the whole underlying object (disk file, registry key, ...)
@@ -107,15 +128,36 @@ public:
virtual bool DeleteAll() = 0;
protected:
// true if environment variables are to be auto-expanded
static bool IsImmutable(const char *szKey)
{ return *szKey == APPCONF_IMMUTABLE_PREFIX; }
// a handy little class which changes current path to the path of given entry
// and restores it in dtor: so if you declare a local variable of this type,
// you work in the entry directory and the path is automatically restored
// when function returns
class PathChanger
{
public:
// ctor/dtor do path changing/restorin
PathChanger(const wxConfig *pContainer, const wxString& strEntry);
~PathChanger();
// get the key name
const wxString& Name() const { return m_strName; }
private:
wxConfig *m_pContainer; // object we live in
wxString m_strName, // name of entry (i.e. name only)
m_strOldPath; // saved path
bool m_bChanged; // was the path changed?
};
// are we doing automatic environment variable expansion?
bool m_bExpandEnvVars;
// static variables
static wxConfig *ms_pConfig;
};
// ----------------------------------------------------------------------------
// functions to create different config implementations
// ----------------------------------------------------------------------------
wxConfig *CreateFileConfig(const wxString& strFile, bool bLocalOnly = FALSE);
#endif //_APPCONF_H