XkbCopyKeyTypes - Man Page

Status XkbCopyKeyTypes (XkbKeyTypePtr from, XkbKeyTypePtr into, int num_types);

from

pointer to array of XkbKeyTypeRecs to copy

into

pointer to array of XkbKeyTypeRecs to change

num_types

number of types to copy

XkbCopyKeyTypes copies num_types XkbKeyTypeRec structures from the array specified by from into the array specified by into. It is intended for copying between, rather than within, keyboard descriptions,  so it  doesn't check for overlaps. The same rules that apply to the from and into parameters in XkbCopyKeyType apply to each entry of the from and into arrays of XkbCopyKeyTypes. If any allocation errors occur while copying from to into, XkbCopyKeyTypes returns BadAlloc. Otherwise, XkbCopyKeyTypes copies from to into and returns Success.

Success

The XkbCopyKeyTypes function returns Success when there are no allocation  errors.

Key types are used to determine the shift level of a key given the current state  of the  keyboard. The set of all possible key types for the Xkb keyboard description are  held in  the types field of the client map, whose total size is stored in size_types, and whose total number of valid entries is stored in num_types. Key types are defined using the following structure:

typedef struct {                   /* Key Type */
    XkbModsRec        mods;        /* modifiers used to compute shift level */
    unsigned char     num_levels;  /* total # shift levels, do not modify directly */
    unsigned char     map_count;   /* # entries in map, preserve (if non-NULL) */
    XkbKTMapEntryPtr  map;         /* vector of modifiers for each shift level */
    XkbModsPtr        preserve;    /* mods to preserve for corresponding map entry */
    Atom              name;        /* name of key type */
    Atom *            level_names; /* array of names of each shift level */
} XkbKeyTypeRec, *XkbKeyTypePtr;

BadAlloc

Unable to allocate storage

XkbCopyKeyType(3)

XkbGetMap(3), XkbGetUpdatedMap(3), XkbSetMap(3).