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CPLStringList Class Reference

String list class designed around our use of C "char**" string lists. More...

#include <cpl_string.h>

Public Member Functions

 CPLStringList (char **papszList, int bTakeOwnership=TRUE)
 CPLStringList constructor. More...
 
 CPLStringList (const CPLStringList &oOther)
 Copy constructor.
 
CPLStringListClear ()
 Clear the string list.
 
int size () const
 Return size of list.
 
int Count () const
 
bool empty () const
 Return whether the list is empty. More...
 
CPLStringListAddString (const char *pszNewString)
 Add a string to the list. More...
 
CPLStringListAddStringDirectly (char *pszNewString)
 Add a string to the list. More...
 
CPLStringListInsertString (int nInsertAtLineNo, const char *pszNewLine)
 Insert into the list at identified location. More...
 
CPLStringListInsertStringDirectly (int nInsertAtLineNo, char *pszNewLine)
 Insert into the list at identified location. More...
 
int FindString (const char *pszTarget) const
 Return index of pszTarget in the list, or -1.
 
int PartialFindString (const char *pszNeedle) const
 Return index of pszTarget in the list (using partial search), or -1.
 
int FindName (const char *pszName) const
 Get index of given name/value keyword. More...
 
bool FetchBool (const char *pszKey, bool bDefault) const
 Check for boolean key value. More...
 
int FetchBoolean (const char *pszKey, int bDefault) const
 DEPRECATED: Check for boolean key value. More...
 
const char * FetchNameValue (const char *pszKey) const
 Fetch value associated with this key name. More...
 
const char * FetchNameValueDef (const char *pszKey, const char *pszDefault) const
 Fetch value associated with this key name. More...
 
CPLStringListAddNameValue (const char *pszKey, const char *pszValue)
 Add a name=value entry to the list. More...
 
CPLStringListSetNameValue (const char *pszKey, const char *pszValue)
 Set name=value entry in the list. More...
 
CPLStringListAssign (char **papszListIn, int bTakeOwnership=TRUE)
 Assign a list of strings. More...
 
CPLStringListoperator= (char **papszListIn)
 Assignment operator.
 
CPLStringListoperator= (const CPLStringList &oOther)
 Assignment operator.
 
char * operator[] (int i)
 Return string at specified index. More...
 
char * operator[] (size_t i)
 Return string at specified index.
 
const char * operator[] (int i) const
 Return string at specified index.
 
const char * operator[] (size_t i) const
 Return string at specified index.
 
char ** List ()
 Return list. More...
 
char ** StealList ()
 Seize ownership of underlying string array. More...
 
CPLStringListSort ()
 Sort the entries in the list and mark list sorted. More...
 
int IsSorted () const
 Returns whether the list is sorted.
 
 operator char ** (void)
 Return lists.
 

Detailed Description

String list class designed around our use of C "char**" string lists.

Constructor & Destructor Documentation

CPLStringList::CPLStringList ( char **  papszListIn,
int  bTakeOwnership = TRUE 
)

CPLStringList constructor.

Parameters
papszListInthe NULL terminated list of strings to consume.
bTakeOwnershipTRUE if the CPLStringList should take ownership of the list of strings which implies responsibility to free them.

Member Function Documentation

CPLStringList & CPLStringList::AddNameValue ( const char *  pszKey,
const char *  pszValue 
)

Add a name=value entry to the list.

A key=value string is prepared and appended to the list. There is no check for other values for the same key in the list.

Parameters
pszKeythe key name to add.
pszValuethe key value to add.
CPLStringList & CPLStringList::AddString ( const char *  pszNewString)

Add a string to the list.

A copy of the passed in string is made and inserted in the list.

Parameters
pszNewStringthe string to add to the list.
CPLStringList & CPLStringList::AddStringDirectly ( char *  pszNewString)

Add a string to the list.

This method is similar to AddString(), but ownership of the pszNewString is transferred to the CPLStringList class.

Parameters
pszNewStringthe string to add to the list.
CPLStringList & CPLStringList::Assign ( char **  papszListIn,
int  bTakeOwnership = TRUE 
)

Assign a list of strings.

Parameters
papszListInthe NULL terminated list of strings to consume.
bTakeOwnershipTRUE if the CPLStringList should take ownership of the list of strings which implies responsibility to free them.
Returns
a reference to the CPLStringList on which it was invoked.
int CPLStringList::Count ( ) const
Returns
count of strings in the list, zero if empty.
bool CPLStringList::empty ( ) const
inline

Return whether the list is empty.

bool CPLStringList::FetchBool ( const char *  pszKey,
bool  bDefault 
) const

Check for boolean key value.

In a CPLStringList of "Name=Value" pairs, look to see if there is a key with the given name, and if it can be interpreted as being TRUE. If the key appears without any "=Value" portion it will be considered true. If the value is NO, FALSE or 0 it will be considered FALSE otherwise if the key appears in the list it will be considered TRUE. If the key doesn't appear at all, the indicated default value will be returned.

Parameters
pszKeythe key value to look for (case insensitive).
bDefaultthe value to return if the key isn't found at all.
Returns
true or false
int CPLStringList::FetchBoolean ( const char *  pszKey,
int  bDefault 
) const

DEPRECATED: Check for boolean key value.

In a CPLStringList of "Name=Value" pairs, look to see if there is a key with the given name, and if it can be interpreted as being TRUE. If the key appears without any "=Value" portion it will be considered true. If the value is NO, FALSE or 0 it will be considered FALSE otherwise if the key appears in the list it will be considered TRUE. If the key doesn't appear at all, the indicated default value will be returned.

Parameters
pszKeythe key value to look for (case insensitive).
bDefaultthe value to return if the key isn't found at all.
Returns
TRUE or FALSE
const char * CPLStringList::FetchNameValue ( const char *  pszName) const

Fetch value associated with this key name.

If this list sorted, a fast binary search is done, otherwise a linear scan is done. Name lookup is case insensitive.

Parameters
pszNamethe key name to search for.
Returns
the corresponding value or NULL if not found. The returned string should not be modified and points into internal object state that may change on future calls.
const char * CPLStringList::FetchNameValueDef ( const char *  pszName,
const char *  pszDefault 
) const

Fetch value associated with this key name.

If this list sorted, a fast binary search is done, otherwise a linear scan is done. Name lookup is case insensitive.

Parameters
pszNamethe key name to search for.
pszDefaultthe default value returned if the named entry isn't found.
Returns
the corresponding value or the passed default if not found.
int CPLStringList::FindName ( const char *  pszKey) const

Get index of given name/value keyword.

Note that this search is for a line in the form name=value or name:value. Use FindString() or PartialFindString() for searches not based on name=value pairs.

Parameters
pszKeythe name to search for.
Returns
the string list index of this name, or -1 on failure.
CPLStringList * CPLStringList::InsertString ( int  nInsertAtLineNo,
const char *  pszNewLine 
)
inline

Insert into the list at identified location.

This method will insert a string into the list at the identified location. The insertion point must be within or at the end of the list. The following entries are pushed down to make space.

Parameters
nInsertAtLineNothe line to insert at, zero to insert at front.
pszNewLineto the line to insert. This string will be copied.
CPLStringList & CPLStringList::InsertStringDirectly ( int  nInsertAtLineNo,
char *  pszNewLine 
)

Insert into the list at identified location.

This method will insert a string into the list at the identified location. The insertion point must be within or at the end of the list. The following entries are pushed down to make space.

Parameters
nInsertAtLineNothe line to insert at, zero to insert at front.
pszNewLineto the line to insert, the ownership of this string will be taken over the by the object. It must have been allocated on the heap.
char** CPLStringList::List ( )
inline

Return list.

Ownership remains to the object

char * CPLStringList::operator[] ( int  i)

Return string at specified index.

Fetch entry "i".

Fetches the requested item in the list. Note that the returned string remains owned by the CPLStringList. If "i" is out of range NULL is returned.

Parameters
ithe index of the list item to return.
Returns
selected entry in the list.
CPLStringList & CPLStringList::SetNameValue ( const char *  pszKey,
const char *  pszValue 
)

Set name=value entry in the list.

Similar to AddNameValue(), except if there is already a value for the key in the list it is replaced instead of adding a new entry to the list. If pszValue is NULL any existing key entry is removed.

Parameters
pszKeythe key name to add.
pszValuethe key value to add.
CPLStringList & CPLStringList::Sort ( )

Sort the entries in the list and mark list sorted.

Note that once put into "sorted" mode, the CPLStringList will attempt to keep things in sorted order through calls to AddString(), AddStringDirectly(), AddNameValue(), SetNameValue(). Complete list assignments (via Assign() and operator= will clear the sorting state. When in sorted order FindName(), FetchNameValue() and FetchNameValueDef() will do a binary search to find the key, substantially improve lookup performance in large lists.

char ** CPLStringList::StealList ( )

Seize ownership of underlying string array.

This method is similar to List(), except that the returned list is now owned by the caller and the CPLStringList is emptied.

Returns
the C style string list.

The documentation for this class was generated from the following files:

Generated for GDAL by doxygen 1.8.8.