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30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
34 | */ |
34 | */ |
- | 35 | ||
- | 36 | /** @addtogroup FileSystemImpl |
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- | 37 | * @{ |
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- | 38 | */ |
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- | 39 | ||
- | 40 | /** |
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- | 41 | * @file utility.c |
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- | 42 | * @brief This is the master header for fs. It includes some other files |
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- | 43 | * and defines the principal constants. |
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- | 44 | */ |
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35 | 45 | ||
36 | 46 | ||
37 | /* This file contains a few general purpose utility routines. */ |
47 | /* This file contains a few general purpose utility routines. */ |
38 | 48 | ||
39 | /* Methods: |
- | |
40 | * fetch_name: go get a path name from user space |
- | |
41 | * no_sys: reject a system call that FS does not handle |
- | |
42 | * conv2: does byte swapping on a 16-bit int |
- | |
43 | * conv4: does byte swapping on a 32-bit long |
- | |
44 | * fs_strncmp: same like strncmp |
- | |
45 | */ |
- | |
46 | - | ||
47 | - | ||
48 | #include <unistd.h> |
49 | #include <unistd.h> |
49 | #include "fs.h" |
50 | #include "fs.h" |
50 | #include "block.h" |
51 | #include "block.h" |
51 | #include "file.h" |
52 | #include "file.h" |
52 | #include "fproc.h" |
53 | #include "fproc.h" |
53 | #include "inode.h" |
54 | #include "inode.h" |
54 | 55 | ||
- | 56 | /** |
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- | 57 | * Go get a path name from user space |
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55 | 58 | */ |
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56 | int fetch_name(char* path, int len) |
59 | int fetch_name(char* path, int len) |
57 | { |
60 | { |
58 | 61 | ||
59 | /* Go get path and put it in 'user_path' */ |
62 | /* Go get path and put it in 'user_path' */ |
60 | 63 | ||
Line 76... | Line 79... | ||
76 | do { *rpu++ = *rpm++; |
79 | do { *rpu++ = *rpm++; |
77 | } while (--len); |
80 | } while (--len); |
78 | 81 | ||
79 | return OK; |
82 | return OK; |
80 | } |
83 | } |
81 | 84 | ||
- | 85 | /** |
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- | 86 | * Reject a system call that FS does not handle |
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- | 87 | */ |
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82 | int no_sys() |
88 | int no_sys() |
83 | { |
89 | { |
84 | 90 | ||
85 | /* Somebody has used an illegal system call number */ |
91 | /* Somebody has used an illegal system call number */ |
86 | 92 | ||
87 | print_console("FS_NOSYS called, illegal system call number!\n"); |
93 | print_console("FS_NOSYS called, illegal system call number!\n"); |
88 | 94 | ||
89 | return FS_EINVAL; |
95 | re\turn FS_EINVAL; |
90 | } |
96 | } |
91 | 97 | ||
- | 98 | /** |
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- | 99 | * Does byte swapping on a 16-bit int |
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- | 100 | */ |
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92 | unsigned conv2(int norm, int w) |
101 | unsigned conv2(int norm, int w) |
93 | { |
102 | { |
94 | 103 | ||
95 | /* Possibly swap a 16-bit word between 8086 and 68000 byte order. */ |
104 | /* Possibly swap a 16-bit word between 8086 and 68000 byte order. */ |
96 | 105 | ||
Line 98... | Line 107... | ||
98 | return((unsigned) w & 0xFFFF); |
107 | return((unsigned) w & 0xFFFF); |
99 | 108 | ||
100 | return(((w&BYTE) << 8) | ( (w>>8) & BYTE)); |
109 | return(((w&BYTE) << 8) | ( (w>>8) & BYTE)); |
101 | } |
110 | } |
102 | 111 | ||
- | 112 | /** |
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- | 113 | * Does byte swapping on a 32-bit long |
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- | 114 | */ |
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103 | long conv4(int norm, long x) |
115 | long conv4(int norm, long x) |
104 | { |
116 | { |
105 | 117 | ||
106 | /* Possibly swap a 32-bit long between 8086 and 68000 byte order. */ |
118 | /* Possibly swap a 32-bit long between 8086 and 68000 byte order. */ |
107 | 119 | ||
Line 116... | Line 128... | ||
116 | l = ((long) lo <<16) | hi; |
128 | l = ((long) lo <<16) | hi; |
117 | 129 | ||
118 | return l; |
130 | return l; |
119 | } |
131 | } |
120 | 132 | ||
- | 133 | /** |
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- | 134 | * Same like strncmp |
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- | 135 | */ |
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121 | int fs_strncmp(const char *src, const char *dst, size_t len) |
136 | int fs_strncmp(const char *src, const char *dst, size_t len) |
122 | { |
137 | { |
123 | 138 | ||
124 | int i, src_len, dst_len; |
139 | int i, src_len, dst_len; |
125 | 140 | ||
Line 142... | Line 157... | ||
142 | return -1; |
157 | return -1; |
143 | } |
158 | } |
144 | 159 | ||
145 | return 0; |
160 | return 0; |
146 | } |
161 | } |
- | 162 | ||
- | 163 | /** |
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- | 164 | * } |
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- | 165 | */ |
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- | 166 |