Xutf8TextPropertyToTextList, XwcFreeStringList, XDefaultString - con-
vert 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, XTextProperty
*text_prop, char ***list_return, int *count_return);
int XwcTextPropertyToTextList(Display *display, XTextProperty
*text_prop, wchar_t ***list_return, int *count_return);
int Xutf8TextPropertyToTextList(Display *display, 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
introduced in XFree86 4.0.2. Its presence is indicated by the macro
X_HAVE_UTF8_STRING.) If the style XTextStyle is specified, this encod-
ing is the encoding of the current locale. If the style XStdICC-
TextStyle is specified, this encoding is ``STRING'' if the text is
fully convertible to STRING, else ``COMPOUND_TEXT''. A final terminat-
ing 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 func-
tions 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 XLocaleNot-
Supported, use XSupportsLocale.
If the supplied text is not fully convertible to the specified encod-
ing, 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 Suc-
cess. 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 dis-
joint 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, Xmb-
TextPropertyToTextList, XwcTextPropertyToTextList and Xutf8TextProper-
tyToTextList 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 encod-
ings is implementation-dependent. In all of these error cases, the
functions do not set any return values.
Otherwise, XmbTextPropertyToTextList, XwcTextPropertyToTextList and
returned by XwcTextPropertyToTextList, use XwcFreeStringList.
The XwcFreeStringList function frees memory allocated by XwcTextProper-
tyToTextList.
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 charac-
ter 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 cur-
rent locale is changed. Until freed, it will not be modified by Xlib.
The functions Xutf8TextListToTextProperty and Xutf8TextPropertyTo-
TextList are an XFree86 extension introduced in XFree86 4.0.2. 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;
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