X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_printw.3x.html;h=90a016cf79044fad7f42fb8efc832ec6ed3b44e5;hb=16fbf3f4f7d96b6ee6bf9159b22f26e05962aa3d;hp=ca67fbe9d0255f62f54fcf6f4749548971ef12da;hpb=c6cfd97b8beaf0f6deafbf8aac7281cf6aa7f012;p=ncurses.git diff --git a/doc/html/man/curs_printw.3x.html b/doc/html/man/curs_printw.3x.html index ca67fbe9..90a016cf 100644 --- a/doc/html/man/curs_printw.3x.html +++ b/doc/html/man/curs_printw.3x.html @@ -1,6 +1,7 @@ -
- +-curs_printw(3x) curs_printw(3x) +curs_printw(3x) curs_printw(3x) --
- printw, wprintw, mvprintw, mvwprintw, vwprintw, vw_printw - - print formatted output in curses windows +
+ printw, wprintw, mvprintw, mvwprintw, vwprintw, vw_printw - print + formatted output in curses windows --
+
#include <curses.h> - int printw(const char *fmt, ...); - int wprintw(WINDOW *win, const char *fmt, ...); - int mvprintw(int y, int x, const char *fmt, ...); - int mvwprintw(WINDOW *win, int y, int x, const char *fmt, - ...); - int vwprintw(WINDOW *win, const char *fmt, va_list var- - glist); - int vw_printw(WINDOW *win, const char *fmt, va_list var- - glist); + int printw(const char *fmt, ...); + int wprintw(WINDOW *win, const char *fmt, ...); + int mvprintw(int y, int x, const char *fmt, ...); + int mvwprintw(WINDOW *win, int y, int x, const char *fmt, ...); + int vw_printw(WINDOW *win, const char *fmt, va_list varglist); + /* obsolete */ + int vwprintw(WINDOW *win, const char *fmt, va_list varglist); --
- The printw, wprintw, mvprintw and mvwprintw routines are - analogous to printf [see printf(3)]. In effect, the - string that would be output by printf is output instead as - though waddstr were used on the given window. - The vwprintw and wv_printw routines are analogous to - vprintf [see printf(3)] and perform a wprintw using a - variable argument list. The third argument is a va_list, - a pointer to a list of arguments, as defined in - <stdarg.h>. +
+ The printw, wprintw, mvprintw and mvwprintw routines are analogous to + printf [see printf(3)]. In effect, the string that would be output by + printf is output instead as though waddstr were used on the given win- + dow. + The vwprintw and vw_printw routines are analogous to vprintf [see + printf(3)] and perform a wprintw using a variable argument list. The + third argument is a va_list, a pointer to a list of arguments, as de- + fined in <stdarg.h>. --
- Routines that return an integer return ERR upon failure - and OK (SVr4 only specifies "an integer value other than - ERR") upon successful completion. - X/Open defines no error conditions. In this implementa- - tion, an error may be returned if it cannot allocate - enough memory for the buffer used to format the results. - It will return an error if the window pointer is null. +
+ Routines that return an integer return ERR upon failure and OK (SVr4 + only specifies "an integer value other than ERR") upon successful com- + pletion. - Functions with a "mv" prefix first perform a cursor move- - ment using wmove, and return an error if the position is - outside the window, or if the window pointer is null. + X/Open defines no error conditions. In this implementation, an error + may be returned if it cannot allocate enough memory for the buffer used + to format the results. It will return an error if the window pointer + is null. + 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. --
- The XSI Curses standard, Issue 4 describes these func- - tions. The function vwprintw is marked TO BE WITHDRAWN, - and is to be replaced by a function vw_printw using the - <stdarg.h> interface. The Single Unix Specification, Ver- - sion 2 states that vw_printw is preferred to vwprintw - since the latter requires including <varargs.h>, which - cannot be used in the same file as <stdarg.h>. This im- - plementation uses <stdarg.h> for both, because that header - is included in <curses.h>. +
+ While printw was implemented in 4BSD, it was unused until 4.2BSD (which + used it in games). That early version of curses was before the ANSI C + standard. It did not use <varargs.h>, though that was available. In + 1991 (a couple of years after SVr4 was generally available, and after + the C standard was published), other developers updated the library, + using <stdarg.h> internally in 4.4BSD curses. Even with this improve- + ment, BSD curses did not use function prototypes (or even declare func- + tions) in the <curses.h> header until 1992. --
- curses(3x), printf(3), vprintf(3) + SVr2 documented printw, wprintw tersely as "printf on stdscr" and + tersely as "printf on win", respectively. + + SVr3 added mvprintw, and mvwprintw, with a three-line summary saying + that they were analogous to printf(3), explaining that the string which + would be output from printf(3) would instead be output using waddstr on + the given window. SVr3 also added vwprintw, saying that the third pa- + rameter is a va_list, defined in <varargs.h>, and referring the reader + to the manual pages for varargs and vprintf for detailed descriptions. + + SVr4 added no new variations of printw, but provided for using + <varargs.h> or <stdarg.h> to define the va_list type. + + X/Open Curses added vw_printw to replace vwprintw, stating that its + va_list definition requires <stdarg.h>. + + +
+ In this implementation, vw_printw and vwprintw are equivalent, to sup- + port legacy applications. However, the latter (vwprintw) is obsolete: + + o The XSI Curses standard, Issue 4 described these functions. The + function vwprintw is marked TO BE WITHDRAWN, and is to be replaced + by a function vw_printw using the <stdarg.h> interface. + + o The Single Unix Specification, Version 2 states that vw_printw is + preferred to vwprintw since the latter requires including + <varargs.h>, which cannot be used in the same file as <stdarg.h>. + This implementation uses <stdarg.h> for both, because that header + is included in <curses.h>. + + o X/Open Curses, Issue 5 (December 2007) marked vwprintw (along with + vwscanw and the termcap interface) as withdrawn. + + +
+ curses(3x), curs_addstr(3x), curs_scanw(3x), curs_termcap(3x), + printf(3), vprintf(3). - curs_printw(3x) + curs_printw(3x)