projects / thirdparty / cups.git / blame
| Commit | Line | Data |
|---|---|---|
| ac884b6a MS |
1 | /* |
| 2 | * "$Id$" | |
| 3 | * | |
| 4 | * Byte checking routines for CUPS. | |
| 5 | * | |
| 6 | * Copyright 2007 by Apple Inc. | |
| 7 | * Copyright 1993-2005 by Easy Software Products. | |
| 8 | * | |
| 9 | * These coded instructions, statements, and computer programs are the | |
| 10 | * property of Apple Inc. and are protected by Federal copyright | |
| 11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
| 12 | * which should have been included with this file. If this file is | |
| 13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
| 14 | * | |
| 15 | * Contents: | |
| 16 | * | |
| 17 | * cupsCheckBytes() - Check to see if all bytes are zero. | |
| 18 | * cupsCheckValue() - Check to see if all bytes match the given value. | |
| 19 | */ | |
| 20 | ||
| 21 | /* | |
| 22 | * Include necessary headers. | |
| 23 | */ | |
| 24 | ||
| 25 | #include "driver.h" | |
| 26 | ||
| 27 | ||
| 28 | /* | |
| 29 | * 'cupsCheckBytes()' - Check to see if all bytes are zero. | |
| 30 | */ | |
| 31 | ||
| 32 | int /* O - 1 if they match */ | |
| 33 | cupsCheckBytes(const unsigned char *bytes, /* I - Bytes to check */ | |
| 34 | int length) /* I - Number of bytes to check */ | |
| 35 | { | |
| 36 | while (length > 7) | |
| 37 | { | |
| 38 | if (*bytes++) | |
| 39 | return (0); | |
| 40 | if (*bytes++) | |
| 41 | return (0); | |
| 42 | if (*bytes++) | |
| 43 | return (0); | |
| 44 | if (*bytes++) | |
| 45 | return (0); | |
| 46 | if (*bytes++) | |
| 47 | return (0); | |
| 48 | if (*bytes++) | |
| 49 | return (0); | |
| 50 | if (*bytes++) | |
| 51 | return (0); | |
| 52 | if (*bytes++) | |
| 53 | return (0); | |
| 54 | ||
| 55 | length -= 8; | |
| 56 | } | |
| 57 | ||
| 58 | while (length > 0) | |
| 59 | if (*bytes++) | |
| 60 | return (0); | |
| 61 | else | |
| 62 | length --; | |
| 63 | ||
| 64 | return (1); | |
| 65 | } | |
| 66 | ||
| 67 | ||
| 68 | /* | |
| 69 | * 'cupsCheckValue()' - Check to see if all bytes match the given value. | |
| 70 | */ | |
| 71 | ||
| 72 | int /* O - 1 if they match */ | |
| 73 | cupsCheckValue(const unsigned char *bytes, /* I - Bytes to check */ | |
| 74 | int length, /* I - Number of bytes to check */ | |
| 75 | const unsigned char value) /* I - Value to check */ | |
| 76 | { | |
| 77 | while (length > 7) | |
| 78 | { | |
| 79 | if (*bytes++ != value) | |
| 80 | return (0); | |
| 81 | if (*bytes++ != value) | |
| 82 | return (0); | |
| 83 | if (*bytes++ != value) | |
| 84 | return (0); | |
| 85 | if (*bytes++ != value) | |
| 86 | return (0); | |
| 87 | if (*bytes++ != value) | |
| 88 | return (0); | |
| 89 | if (*bytes++ != value) | |
| 90 | return (0); | |
| 91 | if (*bytes++ != value) | |
| 92 | return (0); | |
| 93 | if (*bytes++ != value) | |
| 94 | return (0); | |
| 95 | ||
| 96 | length -= 8; | |
| 97 | } | |
| 98 | ||
| 99 | while (length > 0) | |
| 100 | if (*bytes++ != value) | |
| 101 | return (0); | |
| 102 | else | |
| 103 | length --; | |
| 104 | ||
| 105 | return (1); | |
| 106 | } | |
| 107 | ||
| 108 | ||
| 109 | /* | |
| 110 | * End of "$Id$". | |
| 111 | */ |