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Member "src/Common/libzip/zip_source_call.c" (10 Oct 2018, 2379 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2  zip_source_call.c -- invoke callback command on zip_source
    3  Copyright (C) 2009-2014 Dieter Baron and Thomas Klausner
    4 
    5  This file is part of libzip, a library to manipulate ZIP archives.
    6  The authors can be contacted at <libzip@nih.at>
    7 
    8  Redistribution and use in source and binary forms, with or without
    9  modification, are permitted provided that the following conditions
   10  are met:
   11  1. Redistributions of source code must retain the above copyright
   12  notice, this list of conditions and the following disclaimer.
   13  2. Redistributions in binary form must reproduce the above copyright
   14  notice, this list of conditions and the following disclaimer in
   15  the documentation and/or other materials provided with the
   16  distribution.
   17  3. The names of the authors may not be used to endorse or promote
   18  products derived from this software without specific prior
   19  written permission.
   20 
   21  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
   22  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   25  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   27  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   29  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   31  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 
   35 #include "zipint.h"
   36 
   37 
   38 zip_int64_t
   39 _zip_source_call(zip_source_t *src, void *data, zip_uint64_t length, zip_source_cmd_t command) {
   40     zip_int64_t ret;
   41 
   42     if ((src->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(command)) == 0) {
   43     zip_error_set(&src->error, ZIP_ER_OPNOTSUPP, 0);
   44     return -1;
   45     }
   46 
   47     if (src->src == NULL) {
   48     ret = src->cb.f(src->ud, data, length, command);
   49     }
   50     else {
   51     ret = src->cb.l(src->src, src->ud, data, length, command);
   52     }
   53 
   54     if (ret < 0) {
   55     if (command != ZIP_SOURCE_ERROR && command != ZIP_SOURCE_SUPPORTS) {
   56         int e[2];
   57 
   58         if (_zip_source_call(src, e, sizeof(e), ZIP_SOURCE_ERROR) < 0) {
   59         zip_error_set(&src->error, ZIP_ER_INTERNAL, 0);
   60         }
   61         else {
   62         zip_error_set(&src->error, e[0], e[1]);
   63         }
   64     }
   65     }
   66 
   67     return ret;
   68 }