libexplain  1.4.D001
libexplain/buffer/char.c
Go to the documentation of this file.
00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2008, 2009, 2013 Peter Miller
00004  * Written by Peter Miller <pmiller@opensource.org.au>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU Lesser General Public License as
00008  * published by the Free Software Foundation; either version 3 of the
00009  * License, or (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public License
00017  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
00018  */
00019 
00020 #include <libexplain/ac/ctype.h>
00021 #include <libexplain/ac/string.h>
00022 
00023 #include <libexplain/buffer/char.h>
00024 
00025 
00026 void
00027 explain_buffer_char(explain_string_buffer_t *sb, int c)
00028 {
00029     const char      *p;
00030 
00031     c = (unsigned char)c;
00032     if (c == '\'' || c == '\\')
00033     {
00034         explain_string_buffer_putc(sb, '\'');
00035         explain_string_buffer_putc(sb, '\\');
00036         explain_string_buffer_putc(sb, c);
00037         explain_string_buffer_putc(sb, '\'');
00038         return;
00039     }
00040     if (isprint(c))
00041     {
00042         explain_string_buffer_putc(sb, '\'');
00043         explain_string_buffer_putc(sb, c);
00044         explain_string_buffer_putc(sb, '\'');
00045         return;
00046     }
00047     p = strchr("\aa\bb\ff\nn\rr\tt\vv", c);
00048     if (p)
00049     {
00050         explain_string_buffer_putc(sb, '\'');
00051         explain_string_buffer_putc(sb, '\\');
00052         explain_string_buffer_putc(sb, p[1]);
00053         explain_string_buffer_putc(sb, '\'');
00054         return;
00055     }
00056     explain_string_buffer_printf(sb, "0x%02X", c);
00057 }
00058 
00059 
00060 /* vim: set ts=8 sw=4 et : */