libexplain  1.4.D001
libexplain/buffer/errno/ftello.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify it
00006  * under the terms of the GNU Lesser General Public License as published by
00007  * the Free Software Foundation; either version 3 of the License, or (at
00008  * your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful, but
00011  * WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
00013  * 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/errno.h>
00020 
00021 #include <libexplain/buffer/ebadf.h>
00022 #include <libexplain/buffer/errno/ftello.h>
00023 #include <libexplain/buffer/errno/generic.h>
00024 #include <libexplain/buffer/errno/lseek.h>
00025 #include <libexplain/buffer/stream.h>
00026 #include <libexplain/explanation.h>
00027 #include <libexplain/stream_to_fildes.h>
00028 
00029 
00030 static void
00031 explain_buffer_errno_ftello_system_call(explain_string_buffer_t *sb, int errnum,
00032     FILE *fp)
00033 {
00034     (void)errnum;
00035     explain_string_buffer_puts(sb, "ftello(fp = ");
00036     explain_buffer_stream(sb, fp);
00037     explain_string_buffer_putc(sb, ')');
00038 }
00039 
00040 
00041 void
00042 explain_buffer_errno_ftello_explanation(explain_string_buffer_t *sb, int errnum,
00043     const char *syscall_name, FILE *fp)
00044 {
00045     int             fildes;
00046 
00047     /*
00048      * http://www.opengroup.org/onlinepubs/009695399/functions/ftello.html
00049      */
00050     switch (errnum)
00051     {
00052     case EBADF:
00053     case EINVAL:
00054         explain_buffer_ebadf_stream(sb, "fp");
00055         break;
00056 
00057     default:
00058         fildes = explain_stream_to_fildes(fp);
00059         explain_buffer_errno_lseek_explanation
00060         (
00061             sb,
00062             errnum,
00063             syscall_name,
00064             fildes,
00065             0,
00066             SEEK_CUR
00067         );
00068         break;
00069     }
00070 }
00071 
00072 
00073 void
00074 explain_buffer_errno_ftello(explain_string_buffer_t *sb, int errnum, FILE *fp)
00075 {
00076     explain_explanation_t exp;
00077 
00078     explain_explanation_init(&exp, errnum);
00079     explain_buffer_errno_ftello_system_call(&exp.system_call_sb, errnum, fp);
00080     explain_buffer_errno_ftello_explanation(&exp.explanation_sb, errnum,
00081         "ftello", fp);
00082     explain_explanation_assemble(&exp, sb);
00083 }
00084 
00085 
00086 /* vim: set ts=8 sw=4 et : */