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1 /* |
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2 zip_fread.c -- read from file |
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3 Copyright (C) 1999-2014 Dieter Baron and Thomas Klausner |
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4 |
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5 This file is part of libzip, a library to manipulate ZIP archives. |
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6 The authors can be contacted at <libzip@nih.at> |
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7 |
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8 Redistribution and use in source and binary forms, with or without |
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9 modification, are permitted provided that the following conditions |
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10 are met: |
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11 1. Redistributions of source code must retain the above copyright |
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12 notice, this list of conditions and the following disclaimer. |
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13 2. Redistributions in binary form must reproduce the above copyright |
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14 notice, this list of conditions and the following disclaimer in |
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15 the documentation and/or other materials provided with the |
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16 distribution. |
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17 3. The names of the authors may not be used to endorse or promote |
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18 products derived from this software without specific prior |
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19 written permission. |
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20 |
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21 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS |
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22 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY |
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25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
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27 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
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29 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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30 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
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31 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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32 */ |
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33 |
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34 |
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35 #include "zipint.h" |
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36 |
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37 |
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38 ZIP_EXTERN zip_int64_t |
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39 zip_fread(zip_file_t *zf, void *outbuf, zip_uint64_t toread) |
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40 { |
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41 zip_int64_t n; |
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42 |
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43 if (!zf) |
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44 return -1; |
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45 |
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46 if (zf->error.zip_err != 0) |
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47 return -1; |
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48 |
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49 if (toread > ZIP_INT64_MAX) { |
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50 zip_error_set(&zf->error, ZIP_ER_INVAL, 0); |
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51 return -1; |
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52 } |
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53 |
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54 if ((zf->eof) || (toread == 0)) |
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55 return 0; |
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56 |
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57 if ((n=zip_source_read(zf->src, outbuf, toread)) < 0) { |
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58 _zip_error_set_from_source(&zf->error, zf->src); |
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59 return -1; |
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60 } |
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61 |
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62 return n; |
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63 } |
