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zip_replace.c
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00001 /*
00002   zip_replace.c -- replace file via callback function
00003   Copyright (C) 1999-2007 Dieter Baron and Thomas Klausner
00004 
00005   This file is part of libzip, a library to manipulate ZIP archives.
00006   The authors can be contacted at <libzip@nih.at>
00007 
00008   Redistribution and use in source and binary forms, with or without
00009   modification, are permitted provided that the following conditions
00010   are met:
00011   1. Redistributions of source code must retain the above copyright
00012      notice, this list of conditions and the following disclaimer.
00013   2. Redistributions in binary form must reproduce the above copyright
00014      notice, this list of conditions and the following disclaimer in
00015      the documentation and/or other materials provided with the
00016      distribution.
00017   3. The names of the authors may not be used to endorse or promote
00018      products derived from this software without specific prior
00019      written permission.
00020  
00021   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
00022   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00023   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00024   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
00025   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00026   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00027   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00028   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
00029   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
00030   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
00031   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 */
00033 
00034 
00035 
00036 #include "zipint.h"
00037 
00038 
00039 
00040 ZIP_EXTERN(int)
00041 zip_replace(struct zip *za, int idx, struct zip_source *source)
00042 {
00043     if (idx < 0 || idx >= za->nentry || source == NULL) {
00044        _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
00045        return -1;
00046     }
00047 
00048     if (_zip_replace(za, idx, NULL, source) == -1)
00049        return -1;
00050 
00051     return 0;
00052 }
00053 
00054 
00055 
00056 
00057 int
00058 _zip_replace(struct zip *za, int idx, const char *name,
00059             struct zip_source *source)
00060 {
00061     if (idx == -1) {
00062        if (_zip_entry_new(za) == NULL)
00063            return -1;
00064 
00065        idx = za->nentry - 1;
00066     }
00067     
00068     _zip_unchange_data(za->entry+idx);
00069 
00070     if (name && _zip_set_name(za, idx, name) != 0)
00071        return -1;
00072     
00073     za->entry[idx].state = ((za->cdir == NULL || idx >= za->cdir->nentry)
00074                          ? ZIP_ST_ADDED : ZIP_ST_REPLACED);
00075     za->entry[idx].source = source;
00076 
00077     return idx;
00078 }