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int scanw(char *fmt, ...);
int wscanw(WINDOW *win, char *fmt, ...);
int mvscanw(int y, int x, char *fmt, ...);
int mvwscanw(WINDOW *win, int y, int x, char *fmt, ...);
int vw_scanw(WINDOW *win, char *fmt, va_list varglist);
int vwscanw(WINDOW *win, char *fmt, va_list varglist);
The vwscanw and vw_scanw routines are analogous to vscanf. They perform a wscanw using a variable argument list. The third argument is a va_list, a pointer to a list of arguments, as defined in <stdarg.h>.
Applications may use the return value from the scanw, wscanw, mvscanw and mvwscanw routines to determine the number of fields which were mapped in the call.
Functions with a "mv" prefix first perform a cursor movement using wmove, and return an error if the position is outside the window, or if the window pointer is null.
Both XSI and The Single Unix Specification, Version 2 state that these functions return ERR or OK. Since the underlying scanf can return the number of items scanned, and the SVr4 code was documented to use this feature, this is probably an editing error which was introduced in XSI, rather than being done intentionally. Portable applications should only test if the return value is ERR, since the OK value (zero) is likely to be misleading. One possible way to get useful results would be to use a "%n" conversion at the end of the format string to ensure that something was processed.
curs_scanw (3X) |
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