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193 | daniel-mar | 1 | /* |
2 | This file is part of a common library |
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3 | Copyright (C) 2002-6 Toby Thain, toby@telegraphics.com.au |
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4 | |||
5 | This program is free software; you can redistribute it and/or modify |
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6 | it under the terms of the GNU General Public License as published by |
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7 | the Free Software Foundation; either version 2 of the License, or |
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8 | (at your option) any later version. |
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9 | |||
10 | This program 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 |
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13 | GNU General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU General Public License |
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16 | along with this program; if not, write to the Free Software |
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17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | */ |
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19 | |||
20 | /* BigEndian and LittleEndian file I/O for long words, short words, and bytes */ |
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21 | |||
22 | #include "file_io.h" |
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23 | |||
24 | OSErr read4B(FILEREF f,long *v){ |
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25 | unsigned char p[4]; |
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26 | FILECOUNT count = 4; |
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27 | OSErr e = FSRead(f,&count,p); |
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28 | if( !e ) |
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29 | *v = ((long)p[0]<<24) | ((long)p[1]<<16) | ((long)p[2]<<8) | (long)p[3]; |
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30 | return e; |
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31 | } |
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32 | |||
33 | OSErr read2B(FILEREF f,short *v){ |
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34 | unsigned char p[2]; |
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35 | FILECOUNT count = 2; |
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36 | OSErr e = FSRead(f,&count,p); |
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37 | if( !e ) |
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38 | *v = (p[0]<<8) | p[1]; |
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39 | return e; |
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40 | } |
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41 | |||
42 | OSErr read4L(FILEREF f,long *v){ |
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43 | unsigned char p[4]; |
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44 | FILECOUNT count = 4; |
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45 | OSErr e = FSRead(f,&count,p); |
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46 | if( !e ) |
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47 | *v = ((long)p[3]<<24) | ((long)p[2]<<16) | ((long)p[1]<<8) | (long)p[0]; |
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48 | return e; |
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49 | } |
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50 | |||
51 | OSErr read2L(FILEREF f,short *v){ |
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52 | unsigned char p[2]; |
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53 | FILECOUNT count = 2; |
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54 | OSErr e = FSRead(f,&count,p); |
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55 | if( !e ) |
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56 | *v = (p[1]<<8) | p[0]; |
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57 | return e; |
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58 | } |
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59 | |||
60 | OSErr read1(FILEREF f,unsigned char *v){ |
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61 | FILECOUNT count = 1; |
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62 | return FSRead(f,&count,v); |
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63 | } |
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64 | |||
65 | OSErr write4B(FILEREF f,long v){ |
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66 | unsigned char p[4]; |
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67 | FILECOUNT count = 4; |
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68 | p[3] = v; |
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69 | p[2] = v>>8; |
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70 | p[1] = v>>16; |
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71 | p[0] = v>>24; |
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72 | return FSWrite(f,&count,p); |
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73 | } |
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74 | |||
75 | OSErr write2B(FILEREF f,short v){ |
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76 | unsigned char p[2]; |
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77 | FILECOUNT count = 2; |
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78 | p[1] = v; |
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79 | p[0] = v>>8; |
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80 | return FSWrite(f,&count,p); |
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81 | } |
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82 | |||
83 | OSErr write4L(FILEREF f,long v){ |
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84 | unsigned char p[4]; |
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85 | FILECOUNT count = 4; |
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86 | p[0] = v; |
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87 | p[1] = v>>8; |
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88 | p[2] = v>>16; |
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89 | p[3] = v>>24; |
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90 | return FSWrite(f,&count,p); |
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91 | } |
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92 | |||
93 | OSErr write2L(FILEREF f,short v){ |
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94 | unsigned char p[2]; |
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95 | FILECOUNT count = 2; |
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96 | p[0] = v; |
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97 | p[1] = v>>8; |
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98 | return FSWrite(f,&count,p); |
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99 | } |
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100 | |||
101 | OSErr write1(FILEREF f,unsigned char v){ |
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102 | FILECOUNT count = 1; |
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103 | return FSWrite(f,&count,&v); |
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104 | } |
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105 |