Provided by: libx11-doc_1.8.1-2_all 
NAME
XmbTextListToTextProperty, XwcTextListToTextProperty, Xutf8TextListToTextProperty,
XmbTextPropertyToTextList, XwcTextPropertyToTextList, Xutf8TextPropertyToTextList,
XwcFreeStringList, XDefaultString - convert text lists and text property structures
SYNTAX
int XmbTextListToTextProperty(Display *display, char **list, int count, XICCEncodingStyle
style, XTextProperty *text_prop_return);
int XwcTextListToTextProperty(Display *display, wchar_t **list, int count,
XICCEncodingStyle style, XTextProperty *text_prop_return);
int Xutf8TextListToTextProperty(Display *display, char **list, int count,
XICCEncodingStyle style, XTextProperty *text_prop_return);
int XmbTextPropertyToTextList(Display *display, _Xconst XTextProperty *text_prop, char
***list_return, int *count_return);
int XwcTextPropertyToTextList(Display *display, _Xconst XTextProperty *text_prop, wchar_t
***list_return, int *count_return);
int Xutf8TextPropertyToTextList(Display *display, _Xconst XTextProperty *text_prop, char
***list_return, int *count_return);
void XwcFreeStringList(wchar_t **list);
char *XDefaultString(void)
ARGUMENTS
display Specifies the connection to the X server.
list Specifies a list of null-terminated character strings.
count Specifies the number of strings specified.
style Specifies the manner in which the property is encoded.
text_prop_return
Returns the XTextProperty structure.
text_prop Specifies the XTextProperty structure to be used.
list_return
Returns a list of null-terminated character strings.
count_return
Returns the number of strings.
list Specifies the list of strings to be freed.
DESCRIPTION
The XmbTextListToTextProperty, XwcTextListToTextProperty and Xutf8TextListToTextProperty
functions set the specified XTextProperty value to a set of null-separated elements
representing the concatenation of the specified list of null-terminated text strings. The
input text strings must be given in the current locale encoding (for
XmbTextListToTextProperty and XwcTextListToTextProperty), or in UTF-8 encoding (for
Xutf8TextListToTextProperty).
The functions set the encoding field of text_prop_return to an Atom for the specified
display naming the encoding determined by the specified style and convert the specified
text list to this encoding for storage in the text_prop_return value field. If the style
XStringStyle or XCompoundTextStyle is specified, this encoding is “STRING” or
“COMPOUND_TEXT”, respectively. If the style XUTF8StringStyle is specified, this encoding
is “UTF8_STRING”. (This is an extension introduced by The XFree86 Project, Inc., in their
4.0.2 release. Its presence is indicated by the macro X_HAVE_UTF8_STRING.) If the style
XTextStyle is specified, this encoding is the encoding of the current locale. If the
style XStdICCTextStyle is specified, this encoding is “STRING” if the text is fully
convertible to STRING, else “COMPOUND_TEXT”. A final terminating null byte is stored at
the end of the value field of text_prop_return but is not included in the nitems member.
If insufficient memory is available for the new value string, the functions return
XNoMemory. If the current locale is not supported, the functions return
XLocaleNotSupported. In both of these error cases, the functions do not set
text_prop_return.
To determine if the functions are guaranteed not to return XLocaleNotSupported, use
XSupportsLocale.
If the supplied text is not fully convertible to the specified encoding, the functions
return the number of unconvertible characters. Each unconvertible character is converted
to an implementation-defined and encoding-specific default string. Otherwise, the
functions return Success. Note that full convertibility to all styles except XStringStyle
is guaranteed.
To free the storage for the value field, use XFree.
The XmbTextPropertyToTextList, XwcTextPropertyToTextList and Xutf8TextPropertyToTextList
functions return a list of text strings representing the null-separated elements of the
specified XTextProperty structure. The returned strings are encoded using the current
locale encoding (for XmbTextPropertyToTextList and XwcTextPropertyToTextList) or in UTF-8
(for Xutf8TextPropertyToTextList). The data in text_prop must be format 8.
Multiple elements of the property (for example, the strings in a disjoint text selection)
are separated by a null byte. The contents of the property are not required to be null-
terminated; any terminating null should not be included in text_prop.nitems.
If insufficient memory is available for the list and its elements,
XmbTextPropertyToTextList, XwcTextPropertyToTextList and Xutf8TextPropertyToTextList
return XNoMemory. If the current locale is not supported, the functions return
XLocaleNotSupported. Otherwise, if the encoding field of text_prop is not convertible to
the encoding of the current locale, the functions return XConverterNotFound. For
supported locales, existence of a converter from COMPOUND_TEXT, STRING, UTF8_STRING or the
encoding of the current locale is guaranteed if XSupportsLocale returns True for the
current locale (but the actual text may contain unconvertible characters). Conversion of
other encodings is implementation-dependent. In all of these error cases, the functions
do not set any return values.
Otherwise, XmbTextPropertyToTextList, XwcTextPropertyToTextList and
Xutf8TextPropertyToTextList return the list of null-terminated text strings to list_return
and the number of text strings to count_return.
If the value field of text_prop is not fully convertible to the encoding of the current
locale, the functions return the number of unconvertible characters. Each unconvertible
character is converted to a string in the current locale that is specific to the current
locale. To obtain the value of this string, use XDefaultString. Otherwise,
XmbTextPropertyToTextList, XwcTextPropertyToTextList and Xutf8TextPropertyToTextList
return Success.
To free the storage for the list and its contents returned by XmbTextPropertyToTextList or
Xutf8TextPropertyToTextList, use XFreeStringList. To free the storage for the list and
its contents returned by XwcTextPropertyToTextList, use XwcFreeStringList.
The XwcFreeStringList function frees memory allocated by XwcTextPropertyToTextList.
The XDefaultString function returns the default string used by Xlib for text conversion
(for example, in XmbTextPropertyToTextList). The default string is the string in the
current locale that is output when an unconvertible character is found during text
conversion. If the string returned by XDefaultString is the empty string (""), no
character is output in the converted text. XDefaultString does not return NULL.
The string returned by XDefaultString is independent of the default string for text
drawing; see XCreateFontSet to obtain the default string for an XFontSet.
The behavior when an invalid codepoint is supplied to any Xlib function is undefined.
The returned string is null-terminated. It is owned by Xlib and should not be modified or
freed by the client. It may be freed after the current locale is changed. Until freed,
it will not be modified by Xlib.
The functions Xutf8TextListToTextProperty and Xutf8TextPropertyToTextList are extensions
introduced by The XFree86 Project, Inc., in their 4.0.2 release. Their presence is
indicated by the macro X_HAVE_UTF8_STRING.
STRUCTURES
The XTextProperty structure contains:
typedef struct {
unsigned char *value; /* property data */
Atom encoding; /* type of property */
int format; /* 8, 16, or 32 */
unsigned long nitems; /* number of items in value */
} XTextProperty;
The XICCEncodingStyle structure contains:
#define XNoMemory -1
#define XLocaleNotSupported -2
#define XConverterNotFound -3
typedef enum {
XStringStyle, /* STRING */
XCompoundTextStyle, /* COMPOUND_TEXT */
XTextStyle, /* text in owner's encoding (current locale) */
XStdICCTextStyle, /* STRING, else COMPOUND_TEXT */
XUTF8StringStyle /* UTF8_STRING */
} XICCEncodingStyle;
SEE ALSO
XSetTextProperty(3), XStringListToTextProperty(3)
Xlib - C Language X Interface