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#ifndef _IPXE_EDITSTRING_H
#define _IPXE_EDITSTRING_H
/** @file
*
* Editable strings
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** An editable string */
struct edit_string {
/** Dynamically allocated string buffer */
char **buf;
/** Cursor position */
unsigned int cursor;
/* The following items are the edit history */
/** Last cursor position */
unsigned int last_cursor;
/** Start of modified portion of string */
unsigned int mod_start;
/** End of modified portion of string */
unsigned int mod_end;
};
/**
* Initialise editable string
*
* @v string Editable string
* @v buf Dynamically allocated string buffer
*
* The @c buf parameter must be the address of a caller-provided
* pointer to a NUL-terminated string allocated using malloc() (or
* equivalent, such as strdup()). Any edits made to the string will
* realloc() the string buffer as needed.
*
* The caller may choose leave the initial string buffer pointer as @c
* NULL, in which case it will be allocated upon the first attempt to
* insert a character into the buffer. If the caller does this, then
* it must be prepared to find the pointer still @c NULL after
* editing, since the user may never attempt to insert any characters.
*/
static inline __nonnull void init_editstring ( struct edit_string *string,
char **buf ) {
string->buf = buf;
}
extern __attribute__ (( nonnull ( 1 ) )) int
replace_string ( struct edit_string *string, const char *replacement );
extern __nonnull int edit_string ( struct edit_string *string, int key );
#endif /* _IPXE_EDITSTRING_H */
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