Mercurial > repos > blastem
annotate zlib/uncompr.c @ 1549:577253765192
Allow numpad keys to be mapped
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 26 Mar 2018 23:07:17 -0700 |
parents | 00d788dac91a |
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1 /* uncompr.c -- decompress a memory buffer |
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2 * Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler |
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3 * For conditions of distribution and use, see copyright notice in zlib.h |
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4 */ |
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5 |
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6 /* @(#) $Id$ */ |
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7 |
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8 #define ZLIB_INTERNAL |
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9 #include "zlib.h" |
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10 |
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11 /* =========================================================================== |
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12 Decompresses the source buffer into the destination buffer. *sourceLen is |
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13 the byte length of the source buffer. Upon entry, *destLen is the total size |
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14 of the destination buffer, which must be large enough to hold the entire |
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15 uncompressed data. (The size of the uncompressed data must have been saved |
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16 previously by the compressor and transmitted to the decompressor by some |
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17 mechanism outside the scope of this compression library.) Upon exit, |
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18 *destLen is the size of the decompressed data and *sourceLen is the number |
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19 of source bytes consumed. Upon return, source + *sourceLen points to the |
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20 first unused input byte. |
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21 |
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22 uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough |
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23 memory, Z_BUF_ERROR if there was not enough room in the output buffer, or |
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24 Z_DATA_ERROR if the input data was corrupted, including if the input data is |
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25 an incomplete zlib stream. |
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26 */ |
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27 int ZEXPORT uncompress2 (dest, destLen, source, sourceLen) |
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28 Bytef *dest; |
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29 uLongf *destLen; |
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30 const Bytef *source; |
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31 uLong *sourceLen; |
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32 { |
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33 z_stream stream; |
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34 int err; |
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35 const uInt max = (uInt)-1; |
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36 uLong len, left; |
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37 Byte buf[1]; /* for detection of incomplete stream when *destLen == 0 */ |
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38 |
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39 len = *sourceLen; |
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40 if (*destLen) { |
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41 left = *destLen; |
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42 *destLen = 0; |
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43 } |
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44 else { |
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45 left = 1; |
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46 dest = buf; |
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47 } |
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48 |
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49 stream.next_in = (z_const Bytef *)source; |
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50 stream.avail_in = 0; |
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51 stream.zalloc = (alloc_func)0; |
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52 stream.zfree = (free_func)0; |
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53 stream.opaque = (voidpf)0; |
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54 |
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55 err = inflateInit(&stream); |
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56 if (err != Z_OK) return err; |
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57 |
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58 stream.next_out = dest; |
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59 stream.avail_out = 0; |
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60 |
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61 do { |
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62 if (stream.avail_out == 0) { |
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63 stream.avail_out = left > (uLong)max ? max : (uInt)left; |
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64 left -= stream.avail_out; |
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65 } |
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66 if (stream.avail_in == 0) { |
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67 stream.avail_in = len > (uLong)max ? max : (uInt)len; |
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68 len -= stream.avail_in; |
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69 } |
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70 err = inflate(&stream, Z_NO_FLUSH); |
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71 } while (err == Z_OK); |
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72 |
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73 *sourceLen -= len + stream.avail_in; |
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74 if (dest != buf) |
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75 *destLen = stream.total_out; |
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76 else if (stream.total_out && err == Z_BUF_ERROR) |
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77 left = 1; |
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78 |
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79 inflateEnd(&stream); |
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80 return err == Z_STREAM_END ? Z_OK : |
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81 err == Z_NEED_DICT ? Z_DATA_ERROR : |
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82 err == Z_BUF_ERROR && left + stream.avail_out ? Z_DATA_ERROR : |
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83 err; |
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84 } |
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85 |
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86 int ZEXPORT uncompress (dest, destLen, source, sourceLen) |
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87 Bytef *dest; |
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88 uLongf *destLen; |
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89 const Bytef *source; |
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90 uLong sourceLen; |
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91 { |
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92 return uncompress2(dest, destLen, source, &sourceLen); |
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93 } |