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1 /* |
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2 zip_source_call.c -- invoke callback command on zip_source |
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3 Copyright (C) 2009-2014 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_int64_t |
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39 _zip_source_call(zip_source_t *src, void *data, zip_uint64_t length, zip_source_cmd_t command) |
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40 { |
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41 zip_int64_t ret; |
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42 |
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43 if ((src->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(command)) == 0) { |
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44 zip_error_set(&src->error, ZIP_ER_OPNOTSUPP, 0); |
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45 return -1; |
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46 } |
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47 |
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48 if (src->src == NULL) { |
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49 ret = src->cb.f(src->ud, data, length, command); |
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50 } |
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51 else { |
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52 ret = src->cb.l(src->src, src->ud, data, length, command); |
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53 } |
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54 |
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55 if (ret < 0) { |
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56 if (command != ZIP_SOURCE_ERROR && command != ZIP_SOURCE_SUPPORTS) { |
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57 int e[2]; |
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58 |
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59 if (_zip_source_call(src, e, sizeof(e), ZIP_SOURCE_ERROR) < 0) { |
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60 zip_error_set(&src->error, ZIP_ER_INTERNAL, 0); |
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61 } |
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62 else { |
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63 zip_error_set(&src->error, e[0], e[1]); |
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64 } |
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65 } |
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66 } |
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67 |
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68 return ret; |
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69 } |
