release/src/router/libncurses/doc/html/man/curs_addch.3x.html

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  31   * @Id: curs_addch.3x,v 1.32 2011/01/15 14:15:10 tom Exp @
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  40 <H1>curs_addch 3x</H1>
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  42 <PRE>
  43 <!-- Manpage converted by man2html 3.0.1 -->
  44 <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>                                           <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
  45
  46
  47
  48
  49 </PRE>
  50 <H2>NAME</H2><PRE>
  51        <STRONG>addch</STRONG>,  <STRONG>waddch</STRONG>,  <STRONG>mvaddch</STRONG>,  <STRONG>mvwaddch</STRONG>, <STRONG>echochar</STRONG>, <STRONG>wechochar</STRONG> -
  52        add a character (with attributes) to a <STRONG>curses</STRONG> window, then
  53        advance the cursor
  54
  55
  56 </PRE>
  57 <H2>SYNOPSIS</H2><PRE>
  58        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  59
  60        <STRONG>int</STRONG> <STRONG>addch(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  61        <STRONG>int</STRONG> <STRONG>waddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  62        <STRONG>int</STRONG> <STRONG>mvaddch(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  63        <STRONG>int</STRONG> <STRONG>mvwaddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  64        <STRONG>int</STRONG> <STRONG>echochar(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  65        <STRONG>int</STRONG> <STRONG>wechochar(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
  66
  67
  68 </PRE>
  69 <H2>DESCRIPTION</H2><PRE>
  70        The  <STRONG>addch</STRONG>,  <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG> and <STRONG>mvwaddch</STRONG> routines put the
  71        character <EM>ch</EM> into the given window at its  current  window
  72        position,  which  is then advanced.  They are analogous to
  73        <STRONG>putchar</STRONG> in <STRONG><A HREF="stdio.3.html">stdio(3)</A></STRONG>.  If the advance is at the right  mar-
  74        gin,  the  cursor  automatically wraps to the beginning of
  75        the next line.  At the bottom  of  the  current  scrolling
  76        region,  if  <STRONG>scrollok</STRONG>  is enabled, the scrolling region is
  77        scrolled up one line.
  78
  79        If <EM>ch</EM> is a tab, newline, or backspace, the cursor is moved
  80        appropriately within the window.  Backspace moves the cur-
  81        sor one character left; at the left edge of  a  window  it
  82        does  nothing.   Newline  does  a <STRONG>clrtoeol</STRONG>, then moves the
  83        cursor to  the  window  left  margin  on  the  next  line,
  84        scrolling  the  window if on the last line.  Tabs are con-
  85        sidered to be at every eighth column.   The  tab  interval
  86        may be altered by setting the <STRONG>TABSIZE</STRONG> variable.
  87
  88        If <EM>ch</EM> is any control character other than tab, newline, or
  89        backspace, it is drawn  in  <STRONG>^</STRONG><EM>X</EM>  notation.   Calling  <STRONG>winch</STRONG>
  90        after adding a control character does not return the char-
  91        acter itself, but instead returns the ^-representation  of
  92        the control character.
  93
  94        Video attributes can be combined with a character argument
  95        passed to <STRONG>addch</STRONG> or related functions by logical-ORing them
  96        into  the  character.   (Thus, text, including attributes,
  97        can be copied from one place to  another  using  <STRONG>inch</STRONG>  and
  98        <STRONG>addch</STRONG>.)   See  the <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG> page for values of prede-
  99        fined video attribute constants that can be usefully OR'ed
 100        into characters.
 101
 102        The  <STRONG>echochar</STRONG>  and  <STRONG>wechochar</STRONG> routines are equivalent to a
 103        call to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, or a call  to
 104        <STRONG>waddch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>.  The knowledge that
 105        only a single character is being output is used  and,  for
 106        non-control  characters,  a  considerable performance gain
 107        may be seen by  using  these  routines  instead  of  their
 108        equivalents.
 109
 110    <STRONG>Line</STRONG> <STRONG>Graphics</STRONG>
 111        The  following  variables  may be used to add line drawing
 112        characters to the screen with routines of the  <STRONG>addch</STRONG>  fam-
 113        ily.   The  default  character listed below is used if the
 114        <STRONG>acsc</STRONG>  capability  does  not  define  a   terminal-specific
 115        replacement  for  it.   The  names  are  taken  from VT100
 116        nomenclature.
 117
 118
 119        <EM>Name</EM>           <EM>Default</EM>   <EM>Description</EM>
 120        --------------------------------------------------
 121        ACS_BLOCK      #         solid square block
 122        ACS_BOARD      #         board of squares
 123        ACS_BTEE       +         bottom tee
 124        ACS_BULLET     o         bullet
 125        ACS_CKBOARD    :         checker board (stipple)
 126        ACS_DARROW     v         arrow pointing down
 127        ACS_DEGREE     '         degree symbol
 128        ACS_DIAMOND    +         diamond
 129        ACS_GEQUAL     &gt;         greater-than-or-equal-to
 130        ACS_HLINE      -         horizontal line
 131        ACS_LANTERN    #         lantern symbol
 132        ACS_LARROW     &lt;         arrow pointing left
 133        ACS_LEQUAL     &lt;         less-than-or-equal-to
 134        ACS_LLCORNER   +         lower left-hand corner
 135        ACS_LRCORNER   +         lower right-hand corner
 136        ACS_LTEE       +         left tee
 137        ACS_NEQUAL     !         not-equal
 138        ACS_PI         *         greek pi
 139        ACS_PLMINUS    #         plus/minus
 140        ACS_PLUS       +         plus
 141        ACS_RARROW     &gt;         arrow pointing right
 142        ACS_RTEE       +         right tee
 143        ACS_S1         -         scan line 1
 144        ACS_S3         -         scan line 3
 145        ACS_S7         -         scan line 7
 146        ACS_S9         _         scan line 9
 147        ACS_STERLING   f         pound-sterling symbol
 148        ACS_TTEE       +         top tee
 149        ACS_UARROW     ^         arrow pointing up
 150        ACS_ULCORNER   +         upper left-hand corner
 151        ACS_URCORNER   +         upper right-hand corner
 152        ACS_VLINE      |         vertical line
 153
 154
 155 </PRE>
 156 <H2>RETURN VALUE</H2><PRE>
 157        All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
 158        success  (the  SVr4 manuals specify only "an integer value
 159        other than <STRONG>ERR</STRONG>") upon successful completion, unless other-
 160        wise noted in the preceding routine descriptions.
 161
 162        Functions  with a "mv" prefix first perform a cursor move-
 163        ment using <STRONG>wmove</STRONG>, and return an error if the  position  is
 164        outside the window, or if the window pointer is null.
 165
 166
 167 </PRE>
 168 <H2>NOTES</H2><PRE>
 169        Note  that  <STRONG>addch</STRONG>,  <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, and <STRONG>echochar</STRONG> may be
 170        macros.
 171
 172
 173 </PRE>
 174 <H2>PORTABILITY</H2><PRE>
 175        All these functions are described in the XSI Curses  stan-
 176        dard,  Issue  4.  The defaults specified for forms-drawing
 177        characters apply in the POSIX locale.
 178
 179        X/Open Curses states that the <EM>ACS</EM><STRONG>_</STRONG>  definitions  are  <STRONG>char</STRONG>
 180        constants.   For  the  wide-character  implementation (see
 181        <STRONG>curs_add_wch</STRONG>), there are analogous <EM>WACS</EM><STRONG>_</STRONG> definitions which
 182        are <STRONG>cchar_t</STRONG> constants.
 183
 184        Some  ACS symbols (ACS_S3, ACS_S7, ACS_LEQUAL, ACS_GEQUAL,
 185        ACS_PI, ACS_NEQUAL, ACS_STERLING) were not  documented  in
 186        any  publicly  released  System V.  However, many publicly
 187        available terminfos include <STRONG>acsc</STRONG> strings  in  which  their
 188        key  characters  (pryz{|}) are embedded, and a second-hand
 189        list of their character descriptions has  come  to  light.
 190        The   ACS-prefixed   names  for  them  were  invented  for
 191        <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
 192
 193        The <STRONG>TABSIZE</STRONG> variable is implemented in  some  versions  of
 194        curses, but is not part of X/Open curses.
 195
 196        If  <EM>ch</EM>  is  a  carriage return, the cursor is moved to the
 197        beginning of the current row of the window.  This is  true
 198        of other implementations, but is not documented.
 199
 200
 201 </PRE>
 202 <H2>SEE ALSO</H2><PRE>
 203        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>,  <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG>,
 204        <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>,  <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,   <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>,
 205        <STRONG><A HREF="putc.3.html">putc(3)</A></STRONG>.
 206
 207        Comparable  functions  in  the  wide-character  (ncursesw)
 208        library are described in <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>.
 209
 210
 211
 212                                                          <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
 213 </PRE>
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