1 | /*****************************************************************************/ |
2 | // Copyright 2006-2007 Adobe Systems Incorporated |
3 | // All Rights Reserved. |
4 | // |
5 | // NOTICE: Adobe permits you to use, modify, and distribute this file in |
6 | // accordance with the terms of the Adobe license agreement accompanying it. |
7 | /*****************************************************************************/ |
8 | |
9 | /* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_file_stream.cpp#2 $ */ |
10 | /* $DateTime: 2012/06/01 07:28:57 $ */ |
11 | /* $Change: 832715 $ */ |
12 | /* $Author: tknoll $ */ |
13 | |
14 | /*****************************************************************************/ |
15 | |
16 | #include "dng_file_stream.h" |
17 | |
18 | #include "dng_exceptions.h" |
19 | |
20 | /*****************************************************************************/ |
21 | |
22 | dng_file_stream::dng_file_stream (const char *filename, |
23 | bool output, |
24 | uint32 bufferSize) |
25 | |
26 | : dng_stream ((dng_abort_sniffer *) NULL, |
27 | bufferSize, |
28 | 0) |
29 | |
30 | , fFile (NULL) |
31 | |
32 | { |
33 | |
34 | fFile = fopen (filename, output ? "wb" : "rb" ); |
35 | |
36 | if (!fFile) |
37 | { |
38 | |
39 | #if qDNGValidate |
40 | |
41 | ReportError ("Unable to open file" , |
42 | filename); |
43 | |
44 | ThrowSilentError (); |
45 | |
46 | #else |
47 | |
48 | ThrowOpenFile (); |
49 | |
50 | #endif |
51 | |
52 | } |
53 | |
54 | } |
55 | |
56 | /*****************************************************************************/ |
57 | |
58 | dng_file_stream::~dng_file_stream () |
59 | { |
60 | |
61 | if (fFile) |
62 | { |
63 | fclose (fFile); |
64 | fFile = NULL; |
65 | } |
66 | |
67 | } |
68 | |
69 | /*****************************************************************************/ |
70 | |
71 | uint64 dng_file_stream::DoGetLength () |
72 | { |
73 | |
74 | if (fseek (fFile, 0, SEEK_END) != 0) |
75 | { |
76 | |
77 | ThrowReadFile (); |
78 | |
79 | } |
80 | |
81 | return (uint64) ftell (fFile); |
82 | |
83 | } |
84 | |
85 | /*****************************************************************************/ |
86 | |
87 | void dng_file_stream::DoRead (void *data, |
88 | uint32 count, |
89 | uint64 offset) |
90 | { |
91 | |
92 | if (fseek (fFile, (long) offset, SEEK_SET) != 0) |
93 | { |
94 | |
95 | ThrowReadFile (); |
96 | |
97 | } |
98 | |
99 | uint32 bytesRead = (uint32) fread (data, 1, count, fFile); |
100 | |
101 | if (bytesRead != count) |
102 | { |
103 | |
104 | ThrowReadFile (); |
105 | |
106 | } |
107 | |
108 | } |
109 | |
110 | /*****************************************************************************/ |
111 | |
112 | void dng_file_stream::DoWrite (const void *data, |
113 | uint32 count, |
114 | uint64 offset) |
115 | { |
116 | |
117 | if (fseek (fFile, (uint32) offset, SEEK_SET) != 0) |
118 | { |
119 | |
120 | ThrowWriteFile (); |
121 | |
122 | } |
123 | |
124 | uint32 bytesWritten = (uint32) fwrite (data, 1, count, fFile); |
125 | |
126 | if (bytesWritten != count) |
127 | { |
128 | |
129 | ThrowWriteFile (); |
130 | |
131 | } |
132 | |
133 | } |
134 | |
135 | /*****************************************************************************/ |
136 | |