|
1 | | -// $Id: file.cpp,v 1.6 1999/12/28 11:14:05 cisc Exp $ |
2 | | - |
3 | | -#include <stdio.h> |
4 | | -#include "fmgen_types.h" |
5 | | -#include "fmgen_headers.h" |
6 | | -#include "fmgen_file.h" |
7 | | - |
8 | | -// --------------------------------------------------------------------------- |
9 | | -// 構築/消滅 |
10 | | -// --------------------------------------------------------------------------- |
11 | | - |
12 | | -FileIO::FileIO() |
13 | | -{ |
14 | | - flags = 0; |
15 | | -} |
16 | | - |
17 | | -FileIO::FileIO(const char* filename, uint flg) |
18 | | -{ |
19 | | - flags = 0; |
20 | | - Open(filename, flg); |
21 | | -} |
22 | | - |
23 | | -FileIO::~FileIO() |
24 | | -{ |
25 | | - Close(); |
26 | | -} |
27 | | - |
28 | | -// --------------------------------------------------------------------------- |
29 | | -// ファイルを開く |
30 | | -// --------------------------------------------------------------------------- |
31 | | - |
32 | | -bool FileIO::Open(const char* filename, uint flg) |
33 | | -{ |
34 | | - char mode[5] = "rwb"; |
35 | | - Close(); |
36 | | - |
37 | | - strncpy(path, filename, MAX_PATH - 1); |
38 | | - |
39 | | - if(flg & readonly) |
40 | | - strcpy(mode, "rb"); |
41 | | - else { |
42 | | - if(flg & create) |
43 | | - strcpy(mode, "rwb+"); |
44 | | - else |
45 | | - strcpy(mode, "rwb"); |
46 | | - } |
47 | | - |
48 | | - pfile = fopen(filename, mode); |
49 | | - |
50 | | - flags = (flg & readonly) | (pfile == NULL ? 0 : open); |
51 | | - |
52 | | - if (pfile == NULL) |
53 | | - error = file_not_found; |
54 | | - |
55 | | - SetLogicalOrigin(0); |
56 | | - |
57 | | - return !(pfile == NULL); |
58 | | -} |
59 | | - |
60 | | -// --------------------------------------------------------------------------- |
61 | | -// ファイルがない場合は作成 |
62 | | -// --------------------------------------------------------------------------- |
63 | | - |
64 | | -bool FileIO::CreateNew(const char* filename) |
65 | | -{ |
66 | | - uint flg = create; |
67 | | - |
68 | | - return Open(filename, flg); |
69 | | -} |
70 | | - |
71 | | -// --------------------------------------------------------------------------- |
72 | | -// ファイルを作り直す |
73 | | -// --------------------------------------------------------------------------- |
74 | | - |
75 | | -bool FileIO::Reopen(uint flg) |
76 | | -{ |
77 | | - if (!(flags & open)) return false; |
78 | | - if ((flags & readonly) && (flg & create)) return false; |
79 | | - |
80 | | - if (flags & readonly) flg |= readonly; |
81 | | - |
82 | | - return Open(path, flg); |
83 | | -} |
84 | | - |
85 | | -// --------------------------------------------------------------------------- |
86 | | -// ファイルを閉じる |
87 | | -// --------------------------------------------------------------------------- |
88 | | - |
89 | | -void FileIO::Close() |
90 | | -{ |
91 | | - if (GetFlags() & open) |
92 | | - { |
93 | | - fclose(pfile); |
94 | | - flags = 0; |
95 | | - } |
96 | | -} |
97 | | - |
98 | | -// --------------------------------------------------------------------------- |
99 | | -// ファイル殻の読み出し |
100 | | -// --------------------------------------------------------------------------- |
101 | | - |
102 | | -int32 FileIO::Read(void* dest, int32 size) |
103 | | -{ |
104 | | - if (!(GetFlags() & open)) |
105 | | - return -1; |
106 | | - |
107 | | - size_t readsize; |
108 | | - if (!(readsize = fread(dest, 1, static_cast<size_t>(size), pfile))) |
109 | | - return -1; |
110 | | - return size; |
111 | | -} |
112 | | - |
113 | | -// --------------------------------------------------------------------------- |
114 | | -// ファイルへの書き出し |
115 | | -// --------------------------------------------------------------------------- |
116 | | - |
117 | | -int32 FileIO::Write(const void* dest, int32 size) |
118 | | -{ |
119 | | - if (!(GetFlags() & open) || (GetFlags() & readonly)) |
120 | | - return -1; |
121 | | - |
122 | | - size_t writtensize; |
123 | | - if (!(writtensize = fwrite(dest, 1, static_cast<size_t>(size), pfile))) |
124 | | - return -1; |
125 | | - return static_cast<int32>(writtensize); |
126 | | -} |
127 | | - |
128 | | -// --------------------------------------------------------------------------- |
129 | | -// ファイルをシーク |
130 | | -// --------------------------------------------------------------------------- |
131 | | - |
132 | | -bool FileIO::Seek(int32 pos, SeekMethod method) |
133 | | -{ |
134 | | - if (!(GetFlags() & open)) |
135 | | - return false; |
136 | | - |
137 | | - int origin; |
138 | | - switch (method) |
139 | | - { |
140 | | - case begin: |
141 | | - origin = SEEK_SET; |
142 | | - break; |
143 | | - case current: |
144 | | - origin = SEEK_CUR; |
145 | | - break; |
146 | | - case end: |
147 | | - origin = SEEK_END; |
148 | | - break; |
149 | | - default: |
150 | | - return false; |
151 | | - } |
152 | | - |
153 | | - return (fseek(pfile, pos, origin) != 0); |
154 | | -} |
155 | | - |
156 | | -// --------------------------------------------------------------------------- |
157 | | -// ファイルの位置を得る |
158 | | -// --------------------------------------------------------------------------- |
159 | | - |
160 | | -int32 FileIO::Tellp() |
161 | | -{ |
162 | | - if (!(GetFlags() & open)) |
163 | | - return 0; |
164 | | - |
165 | | - return static_cast<int32>(ftell(pfile)); |
166 | | -} |
167 | | - |
168 | | -// --------------------------------------------------------------------------- |
169 | | -// 現在の位置をファイルの終端とする |
170 | | -// --------------------------------------------------------------------------- |
171 | | - |
172 | | -bool FileIO::SetEndOfFile() |
173 | | -{ |
174 | | - if (!(GetFlags() & open)) |
175 | | - return false; |
176 | | - return Seek(0, end); |
177 | | -} |
| 1 | +// $Id: file.cpp,v 1.6 1999/12/28 11:14:05 cisc Exp $ |
| 2 | + |
| 3 | +#include <stdio.h> |
| 4 | +#include "fmgen_types.h" |
| 5 | +#include "fmgen_headers.h" |
| 6 | +#include "fmgen_file.h" |
| 7 | + |
| 8 | +// --------------------------------------------------------------------------- |
| 9 | +// 構築/消滅 |
| 10 | +// --------------------------------------------------------------------------- |
| 11 | + |
| 12 | +FileIO::FileIO() |
| 13 | +{ |
| 14 | + flags = 0; |
| 15 | +} |
| 16 | + |
| 17 | +FileIO::FileIO(const char* filename, uint flg) |
| 18 | +{ |
| 19 | + flags = 0; |
| 20 | + Open(filename, flg); |
| 21 | +} |
| 22 | + |
| 23 | +FileIO::~FileIO() |
| 24 | +{ |
| 25 | + Close(); |
| 26 | +} |
| 27 | + |
| 28 | +// --------------------------------------------------------------------------- |
| 29 | +// ファイルを開く |
| 30 | +// --------------------------------------------------------------------------- |
| 31 | + |
| 32 | +bool FileIO::Open(const char* filename, uint flg) |
| 33 | +{ |
| 34 | + char mode[5] = "rwb"; |
| 35 | + Close(); |
| 36 | + |
| 37 | + strncpy(path, filename, MAX_PATH - 1); |
| 38 | + |
| 39 | + if(flg & readonly) |
| 40 | + strcpy(mode, "rb"); |
| 41 | + else { |
| 42 | + if(flg & create) |
| 43 | + strcpy(mode, "rwb+"); |
| 44 | + else |
| 45 | + strcpy(mode, "rwb"); |
| 46 | + } |
| 47 | + |
| 48 | + pfile = fopen(filename, mode); |
| 49 | + |
| 50 | + flags = (flg & readonly) | (pfile == NULL ? 0 : open); |
| 51 | + |
| 52 | + if (pfile == NULL) |
| 53 | + error = file_not_found; |
| 54 | + |
| 55 | + SetLogicalOrigin(0); |
| 56 | + |
| 57 | + return !(pfile == NULL); |
| 58 | +} |
| 59 | + |
| 60 | +// --------------------------------------------------------------------------- |
| 61 | +// ファイルがない場合は作成 |
| 62 | +// --------------------------------------------------------------------------- |
| 63 | + |
| 64 | +bool FileIO::CreateNew(const char* filename) |
| 65 | +{ |
| 66 | + uint flg = create; |
| 67 | + |
| 68 | + return Open(filename, flg); |
| 69 | +} |
| 70 | + |
| 71 | +// --------------------------------------------------------------------------- |
| 72 | +// ファイルを作り直す |
| 73 | +// --------------------------------------------------------------------------- |
| 74 | + |
| 75 | +bool FileIO::Reopen(uint flg) |
| 76 | +{ |
| 77 | + if (!(flags & open)) return false; |
| 78 | + if ((flags & readonly) && (flg & create)) return false; |
| 79 | + |
| 80 | + if (flags & readonly) flg |= readonly; |
| 81 | + |
| 82 | + return Open(path, flg); |
| 83 | +} |
| 84 | + |
| 85 | +// --------------------------------------------------------------------------- |
| 86 | +// ファイルを閉じる |
| 87 | +// --------------------------------------------------------------------------- |
| 88 | + |
| 89 | +void FileIO::Close() |
| 90 | +{ |
| 91 | + if (GetFlags() & open) |
| 92 | + { |
| 93 | + fclose(pfile); |
| 94 | + flags = 0; |
| 95 | + } |
| 96 | +} |
| 97 | + |
| 98 | +// --------------------------------------------------------------------------- |
| 99 | +// ファイル殻の読み出し |
| 100 | +// --------------------------------------------------------------------------- |
| 101 | + |
| 102 | +int32 FileIO::Read(void* dest, int32 size) |
| 103 | +{ |
| 104 | + if (!(GetFlags() & open)) |
| 105 | + return -1; |
| 106 | + |
| 107 | + size_t readsize; |
| 108 | + if (!(readsize = fread(dest, 1, static_cast<size_t>(size), pfile))) |
| 109 | + return -1; |
| 110 | + return size; |
| 111 | +} |
| 112 | + |
| 113 | +// --------------------------------------------------------------------------- |
| 114 | +// ファイルへの書き出し |
| 115 | +// --------------------------------------------------------------------------- |
| 116 | + |
| 117 | +int32 FileIO::Write(const void* dest, int32 size) |
| 118 | +{ |
| 119 | + if (!(GetFlags() & open) || (GetFlags() & readonly)) |
| 120 | + return -1; |
| 121 | + |
| 122 | + size_t writtensize; |
| 123 | + if (!(writtensize = fwrite(dest, 1, static_cast<size_t>(size), pfile))) |
| 124 | + return -1; |
| 125 | + return static_cast<int32>(writtensize); |
| 126 | +} |
| 127 | + |
| 128 | +// --------------------------------------------------------------------------- |
| 129 | +// ファイルをシーク |
| 130 | +// --------------------------------------------------------------------------- |
| 131 | + |
| 132 | +bool FileIO::Seek(int32 pos, SeekMethod method) |
| 133 | +{ |
| 134 | + if (!(GetFlags() & open)) |
| 135 | + return false; |
| 136 | + |
| 137 | + int origin; |
| 138 | + switch (method) |
| 139 | + { |
| 140 | + case begin: |
| 141 | + origin = SEEK_SET; |
| 142 | + break; |
| 143 | + case current: |
| 144 | + origin = SEEK_CUR; |
| 145 | + break; |
| 146 | + case end: |
| 147 | + origin = SEEK_END; |
| 148 | + break; |
| 149 | + default: |
| 150 | + return false; |
| 151 | + } |
| 152 | + |
| 153 | + return (fseek(pfile, pos, origin) != 0); |
| 154 | +} |
| 155 | + |
| 156 | +// --------------------------------------------------------------------------- |
| 157 | +// ファイルの位置を得る |
| 158 | +// --------------------------------------------------------------------------- |
| 159 | + |
| 160 | +int32 FileIO::Tellp() |
| 161 | +{ |
| 162 | + if (!(GetFlags() & open)) |
| 163 | + return 0; |
| 164 | + |
| 165 | + return static_cast<int32>(ftell(pfile)); |
| 166 | +} |
| 167 | + |
| 168 | +// --------------------------------------------------------------------------- |
| 169 | +// 現在の位置をファイルの終端とする |
| 170 | +// --------------------------------------------------------------------------- |
| 171 | + |
| 172 | +bool FileIO::SetEndOfFile() |
| 173 | +{ |
| 174 | + if (!(GetFlags() & open)) |
| 175 | + return false; |
| 176 | + return Seek(0, end); |
| 177 | +} |
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