libexplain  1.4.D001
libexplain/buffer/iovec.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2009, 2011, 2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU Lesser General Public License as
00007  * published by the Free Software Foundation; either version 3 of the
00008  * License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public License
00016  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00017  */
00018 
00019 #include <libexplain/ac/sys/uio.h>
00020 
00021 #include <libexplain/buffer/iovec.h>
00022 #include <libexplain/buffer/pointer.h>
00023 #include <libexplain/buffer/size_t.h>
00024 #include <libexplain/is_efault.h>
00025 
00026 
00027 void
00028 explain_buffer_iovec(explain_string_buffer_t *sb, const struct iovec *data,
00029     int data_size)
00030 {
00031     int                 j;
00032 
00033     if
00034     (
00035         data_size <= 0
00036     ||
00037         explain_is_efault_pointer(data, data_size * sizeof(*data))
00038     )
00039     {
00040         explain_buffer_pointer(sb, data);
00041         return;
00042     }
00043 
00044     if (data_size > 1)
00045         explain_string_buffer_putc(sb, '{');
00046     for (j = 0; j < data_size; ++j)
00047     {
00048         const struct iovec *p;
00049 
00050         p = data + j;
00051         if (j)
00052             explain_string_buffer_puts(sb, ", ");
00053         explain_string_buffer_puts(sb, "{ ");
00054         explain_buffer_pointer(sb, p->iov_base);
00055         explain_string_buffer_puts(sb, ", ");
00056         explain_buffer_size_t(sb, p->iov_len);
00057         explain_string_buffer_puts(sb, " }");
00058     }
00059     if (data_size > 1)
00060         explain_string_buffer_putc(sb, '}');
00061 }
00062 
00063 
00064 /* vim: set ts=8 sw=4 et : */