Return to manexamp.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / readline / examples

Annotation of embedaddon/readline/examples/manexamp.c, revision 1.1

1.1     ! misho       1: /* manexamp.c -- The examples which appear in the documentation are here. */
        !             2: 
        !             3: /* Copyright (C) 1987-2009 Free Software Foundation, Inc.
        !             4: 
        !             5:    This file is part of the GNU Readline Library (Readline), a library for
        !             6:    reading lines of text with interactive input and history editing.
        !             7: 
        !             8:    Readline is free software: you can redistribute it and/or modify
        !             9:    it under the terms of the GNU General Public License as published by
        !            10:    the Free Software Foundation, either version 3 of the License, or
        !            11:    (at your option) any later version.
        !            12: 
        !            13:    Readline is distributed in the hope that it will be useful,
        !            14:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16:    GNU General Public License for more details.
        !            17: 
        !            18:    You should have received a copy of the GNU General Public License
        !            19:    along with Readline.  If not, see <http://www.gnu.org/licenses/>.
        !            20: */
        !            21: 
        !            22: #include <stdio.h>
        !            23: #include <readline/readline.h>
        !            24: 
        !            25: /* **************************************************************** */
        !            26: /*                                                                  */
        !            27: /*                     How to Emulate gets ()                      */
        !            28: /*                                                                  */
        !            29: /* **************************************************************** */
        !            30: 
        !            31: /* A static variable for holding the line. */
        !            32: static char *line_read = (char *)NULL;
        !            33: 
        !            34: /* Read a string, and return a pointer to it.  Returns NULL on EOF. */
        !            35: char *
        !            36: rl_gets ()
        !            37: {
        !            38:   /* If the buffer has already been allocated, return the memory
        !            39:      to the free pool. */
        !            40:   if (line_read)
        !            41:     {
        !            42:       free (line_read);
        !            43:       line_read = (char *)NULL;
        !            44:     }
        !            45: 
        !            46:   /* Get a line from the user. */
        !            47:   line_read = readline ("");
        !            48: 
        !            49:   /* If the line has any text in it, save it on the history. */
        !            50:   if (line_read && *line_read)
        !            51:     add_history (line_read);
        !            52: 
        !            53:   return (line_read);
        !            54: }
        !            55: 
        !            56: /* **************************************************************** */
        !            57: /*                                                                  */
        !            58: /*        Writing a Function to be Called by Readline.              */
        !            59: /*                                                                  */
        !            60: /* **************************************************************** */
        !            61: 
        !            62: /* Invert the case of the COUNT following characters. */
        !            63: invert_case_line (count, key)
        !            64:      int count, key;
        !            65: {
        !            66:   register int start, end;
        !            67: 
        !            68:   start = rl_point;
        !            69: 
        !            70:   if (count < 0)
        !            71:     {
        !            72:       direction = -1;
        !            73:       count = -count;
        !            74:     }
        !            75:   else
        !            76:     direction = 1;
        !            77:       
        !            78:   /* Find the end of the range to modify. */
        !            79:   end = start + (count * direction);
        !            80: 
        !            81:   /* Force it to be within range. */
        !            82:   if (end > rl_end)
        !            83:     end = rl_end;
        !            84:   else if (end < 0)
        !            85:     end = -1;
        !            86: 
        !            87:   if (start > end)
        !            88:     {
        !            89:       int temp = start;
        !            90:       start = end;
        !            91:       end = temp;
        !            92:     }
        !            93: 
        !            94:   if (start == end)
        !            95:     return;
        !            96: 
        !            97:   /* Tell readline that we are modifying the line, so save the undo
        !            98:      information. */
        !            99:   rl_modifying (start, end);
        !           100: 
        !           101:   for (; start != end; start += direction)
        !           102:     {
        !           103:       if (_rl_uppercase_p (rl_line_buffer[start]))
        !           104:        rl_line_buffer[start] = _rl_to_lower (rl_line_buffer[start]);
        !           105:       else if (_rl_lowercase_p (rl_line_buffer[start]))
        !           106:        rl_line_buffer[start] = _rl_to_upper (rl_line_buffer[start]);
        !           107:     }
        !           108: 
        !           109:   /* Move point to on top of the last character changed. */
        !           110:   rl_point = end - direction;
        !           111: }