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1 /* |
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2 zip_source_function.c -- create zip data source from callback function |
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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 <stdlib.h> |
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36 |
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37 #include "zipint.h" |
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38 |
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39 |
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40 ZIP_EXTERN zip_source_t * |
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41 zip_source_function(zip_t *za, zip_source_callback zcb, void *ud) |
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42 { |
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43 if (za == NULL) { |
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44 return NULL; |
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45 } |
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46 |
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47 return zip_source_function_create(zcb, ud, &za->error); |
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48 } |
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49 |
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50 |
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51 ZIP_EXTERN zip_source_t * |
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52 zip_source_function_create(zip_source_callback zcb, void *ud, zip_error_t *error) |
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53 { |
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54 zip_source_t *zs; |
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55 |
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56 if ((zs=_zip_source_new(error)) == NULL) |
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57 return NULL; |
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58 |
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59 zs->cb.f = zcb; |
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60 zs->ud = ud; |
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61 |
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62 zs->supports = zcb(ud, NULL, 0, ZIP_SOURCE_SUPPORTS); |
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63 if (zs->supports < 0) { |
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64 zs->supports = ZIP_SOURCE_SUPPORTS_READABLE; |
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65 } |
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66 |
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67 return zs; |
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68 } |
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69 |
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70 |
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71 ZIP_EXTERN void |
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72 zip_source_keep(zip_source_t *src) |
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73 { |
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74 src->refcount++; |
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75 } |
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76 |
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77 |
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78 zip_source_t * |
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79 _zip_source_new(zip_error_t *error) |
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80 { |
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81 zip_source_t *src; |
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82 |
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83 if ((src=(zip_source_t *)malloc(sizeof(*src))) == NULL) { |
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84 zip_error_set(error, ZIP_ER_MEMORY, 0); |
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85 return NULL; |
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86 } |
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87 |
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88 src->src = NULL; |
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89 src->cb.f = NULL; |
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90 src->ud = NULL; |
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91 src->open_count = 0; |
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92 src->write_state = ZIP_SOURCE_WRITE_CLOSED; |
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93 src->source_closed = false; |
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94 src->source_archive = NULL; |
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95 src->refcount = 1; |
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96 zip_error_init(&src->error); |
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97 |
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98 return src; |
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99 } |
