curs_getstr.3x.html 7.9 KB

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  30. * @Id: curs_getstr.3x,v 1.15 2006/01/12 00:30:58 tom Exp @
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  39. <H1>curs_getstr 3x</H1>
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  41. <PRE>
  42. <!-- Manpage converted by man2html 3.0.1 -->
  43. <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG> <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>
  44. </PRE>
  45. <H2>NAME</H2><PRE>
  46. <STRONG>getstr</STRONG>, <STRONG>getnstr</STRONG>, <STRONG>wgetstr</STRONG>, <STRONG>wgetnstr</STRONG>, <STRONG>mvgetstr</STRONG>, <STRONG>mvgetnstr</STRONG>,
  47. <STRONG>mvwgetstr</STRONG>, <STRONG>mvwgetnstr</STRONG> - accept character strings from
  48. <STRONG>curses</STRONG> terminal keyboard
  49. </PRE>
  50. <H2>SYNOPSIS</H2><PRE>
  51. <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  52. <STRONG>int</STRONG> <STRONG>getstr(char</STRONG> <STRONG>*str);</STRONG>
  53. <STRONG>int</STRONG> <STRONG>getnstr(char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
  54. <STRONG>int</STRONG> <STRONG>wgetstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
  55. <STRONG>int</STRONG> <STRONG>wgetnstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
  56. <STRONG>int</STRONG> <STRONG>mvgetstr(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
  57. <STRONG>int</STRONG> <STRONG>mvwgetstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
  58. <STRONG>int</STRONG> <STRONG>mvgetnstr(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
  59. <STRONG>int</STRONG> <STRONG>mvwgetnstr(WINDOW</STRONG> <STRONG>*,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
  60. </PRE>
  61. <H2>DESCRIPTION</H2><PRE>
  62. The function <STRONG>getstr</STRONG> is equivalent to a series of calls to
  63. <STRONG>getch</STRONG>, until a newline or carriage return is received (the
  64. terminating character is not included in the returned
  65. string). The resulting value is placed in the area point-
  66. ed to by the character pointer <EM>str</EM>.
  67. <STRONG>wgetnstr</STRONG> reads at most <EM>n</EM> characters, thus preventing a
  68. possible overflow of the input buffer. Any attempt to en-
  69. ter more characters (other than the terminating newline or
  70. carriage return) causes a beep. Function keys also cause
  71. a beep and are ignored. The <STRONG>getnstr</STRONG> function reads from
  72. the <EM>stdscr</EM> default window.
  73. The user's erase and kill characters are interpreted. If
  74. keypad mode is on for the window, <STRONG>KEY_LEFT</STRONG> and
  75. <STRONG>KEY_BACKSPACE</STRONG> are both considered equivalent to the user's
  76. kill character.
  77. Characters input are echoed only if <STRONG>echo</STRONG> is currently on.
  78. In that case, backspace is echoed as deletion of the pre-
  79. vious character (typically a left motion).
  80. </PRE>
  81. <H2>RETURN VALUE</H2><PRE>
  82. All routines return the integer <STRONG>ERR</STRONG> upon failure and an <STRONG>OK</STRONG>
  83. (SVr4 specifies only "an integer value other than <STRONG>ERR</STRONG>")
  84. upon successful completion.
  85. X/Open defines no error conditions.
  86. In this implementation, these functions return an error if
  87. the window pointer is null, or if its timeout expires
  88. without having any data.
  89. This implementation provides an extension as well. If a
  90. SIGWINCH interrupts the function, it will return <STRONG>KEY_RE-</STRONG>
  91. <STRONG>SIZE</STRONG> rather than <STRONG>OK</STRONG> or <STRONG>ERR</STRONG>.
  92. </PRE>
  93. <H2>NOTES</H2><PRE>
  94. Note that <STRONG>getstr</STRONG>, <STRONG>mvgetstr</STRONG>, and <STRONG>mvwgetstr</STRONG> may be macros.
  95. </PRE>
  96. <H2>PORTABILITY</H2><PRE>
  97. These functions are described in the XSI Curses standard,
  98. Issue 4. They read single-byte characters only. The
  99. standard does not define any error conditions. This im-
  100. plementation returns ERR if the window pointer is null, or
  101. if the lower-level <STRONG>wgetch</STRONG> call returns an ERR.
  102. SVr3 and early SVr4 curses implementations did not reject
  103. function keys; the SVr4.0 documentation claimed that "spe-
  104. cial keys" (such as function keys, "home" key, "clear"
  105. key, <EM>etc</EM>.) are "interpreted", without giving details. It
  106. lied. In fact, the `character' value appended to the
  107. string by those implementations was predictable but not
  108. useful (being, in fact, the low-order eight bits of the
  109. key's KEY_ value).
  110. The functions <STRONG>getnstr</STRONG>, <STRONG>mvgetnstr</STRONG>, and <STRONG>mvwgetnstr</STRONG> were
  111. present but not documented in SVr4.
  112. </PRE>
  113. <H2>SEE ALSO</H2><PRE>
  114. <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG>.
  115. <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>
  116. </PRE>
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