1 | /* |
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2 | Copyright (C) 1996-1998 by Patrick Reynolds |
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3 | Email: <no.email@noemail.com> |
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4 | |
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5 | This library is free software; you can redistribute it and/or |
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6 | modify it under the terms of the GNU Lesser General Public |
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7 | License as published by the Free Software Foundation; either |
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8 | version 2.1 of the License, or (at your option) any later version. |
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9 | |
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10 | This library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | Lesser General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with this library; if not, write to the Free Software |
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17 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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18 | |
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19 | */ |
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20 | |
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21 | #include "PPort.h" |
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22 | #include "port.h" |
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23 | |
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24 | #include <unistd.h> |
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25 | #include <sys/types.h> |
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26 | #include <iostream> |
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27 | |
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28 | using namespace std; |
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29 | |
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30 | #define TEST_VALIDITY {if (this==NULL) return false;} |
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31 | |
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32 | PPort::PPort() { |
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33 | reset(); |
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34 | } |
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35 | |
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36 | PPort::PPort(int ioPort) { |
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37 | reset(); |
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38 | setPort(ioPort); |
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39 | } |
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40 | |
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41 | PPort::~PPort() |
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42 | { |
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43 | delete currentPort; |
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44 | } |
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45 | |
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46 | void PPort::reset() { |
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47 | bitArray=0; |
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48 | for (int i=0;i<8;++i) { |
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49 | assignedBit[i]=NULL; |
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50 | } |
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51 | currentPort=NULL; |
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52 | } |
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53 | |
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54 | bool PPort::setPort(int ioPort) { |
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55 | TEST_VALIDITY; |
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56 | if (geteuid() != 0) { |
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57 | cerr << "must be setuid root control parallel port"<<endl; |
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58 | return false; |
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59 | } |
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60 | delete currentPort; |
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61 | reset(); |
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62 | currentPort=new port_t(ioPort); |
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63 | return commit(); |
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64 | } |
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65 | |
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66 | bool PPort::commit() { |
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67 | TEST_VALIDITY; |
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68 | if (currentPort) { |
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69 | currentPort->write_data(bitArray); |
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70 | return true; |
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71 | } else { |
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72 | return false; |
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73 | } |
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74 | } |
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75 | |
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76 | bool PPort::setBit(const void * ID,int bit,bool stat) { |
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77 | TEST_VALIDITY; |
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78 | if (ID != assignedBit[bit]) { |
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79 | return false; |
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80 | } |
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81 | |
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82 | if (stat) { |
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83 | bitArray |= (1<<bit); |
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84 | } else { |
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85 | bitArray &= ~(1<<bit); |
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86 | } |
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87 | return true; |
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88 | } |
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89 | |
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90 | bool PPort::registerBit(const void * ID,int bit) { |
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91 | TEST_VALIDITY; |
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92 | if (assignedBit[bit] || currentPort==NULL) { |
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93 | return false; |
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94 | } |
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95 | assignedBit[bit]=ID; |
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96 | return true; |
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97 | } |
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98 | |
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99 | bool PPort::unregisterBit(const void * ID,int bit) { |
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100 | TEST_VALIDITY; |
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101 | if (assignedBit[bit] != ID) { |
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102 | return false; |
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103 | } |
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104 | assignedBit[bit]=NULL; |
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105 | return true; |
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106 | } |
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107 | |
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108 | bool PPort::isRegisterBit(const void * ID,int bit) const { |
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109 | TEST_VALIDITY; |
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110 | return (assignedBit[bit] == ID); |
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111 | } |
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