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Member "src/Common/libzip/zip_io_util.c" (10 Oct 2018, 3579 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2  zip_io_util.c -- I/O helper functions
    3  Copyright (C) 1999-2016 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 #include <stdlib.h>
   35 #include <string.h>
   36 
   37 #include "zipint.h"
   38 
   39 int
   40 _zip_read(zip_source_t *src, zip_uint8_t *b, zip_uint64_t length, zip_error_t *error) {
   41     zip_int64_t n;
   42 
   43     if (length > ZIP_INT64_MAX) {
   44     zip_error_set(error, ZIP_ER_INTERNAL, 0);
   45     return -1;
   46     }
   47 
   48     if ((n = zip_source_read(src, b, length)) < 0) {
   49     _zip_error_set_from_source(error, src);
   50     return -1;
   51     }
   52 
   53     if (n < (zip_int64_t)length) {
   54     zip_error_set(error, ZIP_ER_EOF, 0);
   55     return -1;
   56     }
   57 
   58     return 0;
   59 }
   60 
   61 
   62 zip_uint8_t *
   63 _zip_read_data(zip_buffer_t *buffer, zip_source_t *src, size_t length, bool nulp, zip_error_t *error) {
   64     zip_uint8_t *r;
   65 
   66     if (length == 0 && !nulp) {
   67     return NULL;
   68     }
   69 
   70     r = (zip_uint8_t *)malloc(length + (nulp ? 1 : 0));
   71     if (!r) {
   72     zip_error_set(error, ZIP_ER_MEMORY, 0);
   73     return NULL;
   74     }
   75 
   76     if (buffer) {
   77     zip_uint8_t *data = _zip_buffer_get(buffer, length);
   78 
   79     if (data == NULL) {
   80         zip_error_set(error, ZIP_ER_MEMORY, 0);
   81         free(r);
   82         return NULL;
   83     }
   84     memcpy(r, data, length);
   85     }
   86     else {
   87     if (_zip_read(src, r, length, error) < 0) {
   88         free(r);
   89         return NULL;
   90     }
   91     }
   92 
   93     if (nulp) {
   94     zip_uint8_t *o;
   95     /* replace any in-string NUL characters with spaces */
   96     r[length] = 0;
   97     for (o = r; o < r + length; o++)
   98         if (*o == '\0')
   99         *o = ' ';
  100     }
  101 
  102     return r;
  103 }
  104 
  105 
  106 zip_string_t *
  107 _zip_read_string(zip_buffer_t *buffer, zip_source_t *src, zip_uint16_t len, bool nulp, zip_error_t *error) {
  108     zip_uint8_t *raw;
  109     zip_string_t *s;
  110 
  111     if ((raw = _zip_read_data(buffer, src, len, nulp, error)) == NULL)
  112     return NULL;
  113 
  114     s = _zip_string_new(raw, len, ZIP_FL_ENC_GUESS, error);
  115     free(raw);
  116     return s;
  117 }
  118 
  119 
  120 int
  121 _zip_write(zip_t *za, const void *data, zip_uint64_t length) {
  122     zip_int64_t n;
  123 
  124     if ((n = zip_source_write(za->src, data, length)) < 0) {
  125     _zip_error_set_from_source(&za->error, za->src);
  126     return -1;
  127     }
  128     if ((zip_uint64_t)n != length) {
  129     zip_error_set(&za->error, ZIP_ER_WRITE, EINTR);
  130     return -1;
  131     }
  132 
  133     return 0;
  134 }