projects / andy / viking.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c1cf59f RN |
1 | /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ |
| 2 | /* | |
| 3 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
| 4 | * | |
| 5 | * Copyright (C) 2016, Rob Norris <rw_norris@hotmail.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 20 | * | |
| 21 | */ | |
| 22 | ||
| 23 | #ifdef HAVE_CONFIG_H | |
| 24 | #include "config.h" | |
| 25 | #endif | |
| 26 | #include "file_magic.h" | |
| 27 | #include "file.h" | |
| 28 | #ifdef HAVE_MAGIC_H | |
| 29 | #include <magic.h> | |
| 30 | #endif | |
| 31 | #include <string.h> | |
| 32 | ||
| 33 | /** | |
| 34 | * file_magic_check: | |
| 35 | * @filename: The file | |
| 36 | * @magic_string: Type of file (this part matched against the magic library response) | |
| 37 | * @extension: Optional extension to try when Magic Library is not available | |
| 38 | * | |
| 39 | * Returns: Whether the file is of the specified type. | |
| 40 | * Uses the Magic library if available to determine the file against the supplied type. | |
| 41 | * Otherwise uses a rudimentary file extension check. | |
| 42 | */ | |
| 43 | gboolean file_magic_check ( const gchar *filename, const gchar *magic_string, const gchar *extension ) | |
| 44 | { | |
| 45 | gboolean is_requested_file_type = FALSE; | |
| 46 | #ifdef HAVE_MAGIC_H | |
| 47 | #ifdef MAGIC_VERSION | |
| 48 | // Or magic_version() if available - probably need libmagic 5.18 or so | |
| 49 | // (can't determine exactly which version the versioning became available) | |
| 50 | g_debug ("%s: magic version: %d", __FUNCTION__, MAGIC_VERSION ); | |
| 51 | #endif | |
| 52 | magic_t myt = magic_open ( MAGIC_CONTINUE|MAGIC_ERROR|MAGIC_MIME ); | |
| 53 | if ( myt ) { | |
| 54 | #ifdef WINDOWS | |
| 55 | // We have to 'package' the magic database ourselves :( | |
| 56 | // --> %PROGRAM FILES%\Viking\magic.mgc | |
| 57 | int ml = magic_load ( myt, ".\\magic.mgc" ); | |
| 58 | #else | |
| 59 | // Use system default | |
| 60 | int ml = magic_load ( myt, NULL ); | |
| 61 | #endif | |
| 62 | if ( ml == 0 ) { | |
| 63 | const char* magic = magic_file ( myt, filename ); | |
| 64 | g_debug ("%s: magic output: %s", __FUNCTION__, magic ); | |
| 65 | ||
| 66 | if ( g_ascii_strncasecmp ( magic, magic_string, strlen(magic_string) ) == 0 ) | |
| 67 | is_requested_file_type = TRUE; | |
| 68 | } | |
| 69 | else { | |
| 70 | g_critical ("%s: magic load database failure", __FUNCTION__ ); | |
| 71 | } | |
| 72 | ||
| 73 | magic_close ( myt ); | |
| 74 | } | |
| 75 | else | |
| 76 | #endif | |
| 77 | is_requested_file_type = a_file_check_ext ( filename, extension ); | |
| 78 | ||
| 79 | return is_requested_file_type; | |
| 80 | } |