X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_inch.3x.html;h=a3382dfd186d407f009927d56dc6d35eb316499f;hb=152c5a605234b7ea36ba3a03ec07e124bb6aac75;hp=b3f1485d989a65897389e177885cf0406db44ec1;hpb=46722468f47c2b77b3987729b4bcf2321cccfd01;p=ncurses.git diff --git a/doc/html/man/curs_inch.3x.html b/doc/html/man/curs_inch.3x.html index b3f1485d..a3382dfd 100644 --- a/doc/html/man/curs_inch.3x.html +++ b/doc/html/man/curs_inch.3x.html @@ -1,8 +1,8 @@ - +
+ +- +curs_inch(3x) curs_inch(3x) --
- inch, winch, mvinch, mvwinch - get a character and - attributes from a curses window --
+ +
+ inch, winch, mvinch, mvwinch - get a character and attributes from a + curses window + + +
#include <curses.h> chtype inch(void); - chtype winch(WINDOW *win); - chtype mvinch(int y, int x); - chtype mvwinch(WINDOW *win, int y, int x); + chtype winch(WINDOW *win); + chtype mvinch(int y, int x); + chtype mvwinch(WINDOW *win, int y, int x); --
- These routines return the character, of type chtype, at - the current position in the named window. If any - attributes are set for that position, their values are - OR'ed into the value returned. Constants defined in - <curses.h> can be used with the & (logical AND) operator - to extract the character or attributes alone. + +
+ These routines return the character, of type chtype, at the current + position in the named window. If any attributes are set for that + position, their values are OR'ed into the value returned. Constants + defined in <curses.h> can be used with the & (logical AND) operator to + extract the character or attributes alone. - Attributes - The following bit-masks may be AND-ed with characters - returned by winch. +
+ The following bit-masks may be AND-ed with characters returned by + winch. A_CHARTEXT Bit-mask to extract character A_ATTRIBUTES Bit-mask to extract attributes A_COLOR Bit-mask to extract color-pair field information --
- Note that all of these routines may be macros. +
+ 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. - --
- These functions are described in the XSI Curses standard, - Issue 4. + The winch function does not return an error if the window contains + characters larger than 8-bits (255). Only the low-order 8 bits of the + character are used by winch. --
- curses(3x). - +
+ Note that all of these routines may be macros. +
+ These functions are described in the XSI Curses standard, Issue 4. + Very old systems (before standardization) provide a different function + with the same name: + o The winch function was part of the original BSD curses library, + which stored a 7-bit character combined with the standout + attribute. + In BSD curses, winch returned only the character (as an integer) + with the standout attribute removed. + o System V curses added support for several video attributes which + could be combined with characters in the window. + Reflecting this improvement, the function was altered to return the + character combined with all video attributes in a chtype value. + X/Open Curses does not specify the size and layout of attributes, color + and character values in chtype; it is implementation-dependent. This + implementation uses 8 bits for character values. An application using + more bits, e.g., a Unicode value, should use the wide-character + equivalents to these functions. +
+ curses(3x) + gives an overview of the WINDOW and chtype data types. + curs_attr(3x) + goes into more detail, pointing out portability problems and + constraints on the use of chtype for returning window information. + curs_in_wch(3x) + describes comparable functions for the wide-character (ncursesw) + library. + curs_inch(3x)-