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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* Reentrant versions of lseek system call. */ |
| 2 | |||
| 3 | #include |
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| 4 | #include |
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| 5 | #include <_syslist.h> |
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| 6 | #include |
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| 7 | |||
| 8 | /* Some targets provides their own versions of this functions. Those |
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| 9 | targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ |
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| 10 | |||
| 11 | #ifdef _REENT_ONLY |
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| 12 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
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| 13 | #define REENTRANT_SYSCALLS_PROVIDED |
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| 14 | #endif |
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| 15 | #endif |
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| 16 | |||
| 17 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
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| 18 | |||
| 19 | #pragma pack(push, 1) |
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| 20 | typedef struct |
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| 21 | { |
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| 22 | char sec; |
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| 23 | char min; |
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| 24 | char hour; |
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| 25 | char rsv; |
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| 26 | }detime_t; |
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| 27 | |||
| 28 | typedef struct |
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| 29 | { |
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| 30 | char day; |
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| 31 | char month; |
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| 32 | short year; |
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| 33 | }dedate_t; |
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| 34 | |||
| 35 | typedef struct |
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| 36 | { |
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| 37 | unsigned attr; |
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| 38 | unsigned flags; |
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| 39 | union |
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| 40 | { |
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| 41 | detime_t ctime; |
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| 42 | unsigned cr_time; |
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| 43 | }; |
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| 44 | union |
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| 45 | { |
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| 46 | dedate_t cdate; |
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| 47 | unsigned cr_date; |
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| 48 | }; |
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| 49 | union |
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| 50 | { |
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| 51 | detime_t atime; |
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| 52 | unsigned acc_time; |
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| 53 | }; |
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| 54 | union |
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| 55 | { |
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| 56 | dedate_t adate; |
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| 57 | unsigned acc_date; |
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| 58 | }; |
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| 59 | union |
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| 60 | { |
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| 61 | detime_t mtime; |
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| 62 | unsigned mod_time; |
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| 63 | }; |
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| 64 | union |
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| 65 | { |
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| 66 | dedate_t mdate; |
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| 67 | unsigned mod_date; |
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| 68 | }; |
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| 69 | unsigned size; |
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| 70 | unsigned size_high; |
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| 71 | } FILEINFO; |
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| 72 | |||
| 73 | #pragma pack(pop) |
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| 74 | |||
| 75 | |||
| 76 | extern unsigned __NFiles; |
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| 77 | |||
| 78 | #define __handle_check( __h, __r ) \ |
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| 79 | if( (__h) < 0 || (__h) > __NFiles ) { \ |
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| 80 | ptr->_errno = EBADF ; \ |
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| 81 | return( __r ); \ |
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| 82 | } |
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| 83 | |||
| 84 | |||
| 85 | /* |
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| 86 | FUNCTION |
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| 87 | <<_lseek_r>>---Reentrant version of lseek |
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| 88 | |||
| 89 | INDEX |
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| 90 | _lseek_r |
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| 91 | |||
| 92 | ANSI_SYNOPSIS |
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| 93 | #include |
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| 94 | off_t _lseek_r(struct _reent *<[ptr]>, |
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| 95 | int <[fd]>, off_t <[pos]>, int <[whence]>); |
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| 96 | |||
| 97 | TRAD_SYNOPSIS |
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| 98 | #include |
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| 99 | off_t _lseek_r(<[ptr]>, <[fd]>, <[pos]>, <[whence]>) |
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| 100 | struct _reent *<[ptr]>; |
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| 101 | int <[fd]>; |
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| 102 | off_t <[pos]>; |
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| 103 | int <[whence]>; |
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| 104 | |||
| 105 | DESCRIPTION |
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| 106 | This is a reentrant version of < |
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| 107 | takes a pointer to the global data block, which holds |
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| 108 | < |
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| 109 | */ |
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| 110 | |||
| 111 | _off_t |
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| 112 | _DEFUN (_lseek_r, (ptr, fd, pos, whence), |
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| 113 | struct _reent *ptr _AND |
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| 114 | int fd _AND |
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| 115 | _off_t pos _AND |
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| 116 | int whence) |
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| 117 | { |
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| 118 | _off_t ret; |
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| 119 | __file_handle *fh; |
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| 120 | |||
| 121 | __handle_check( fd, -1 ); |
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| 122 | fh = (__file_handle*) __getOSHandle( fd ); |
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| 123 | |||
| 124 | switch(whence) |
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| 125 | { |
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| 126 | case SEEK_SET: |
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| 127 | ret = pos; |
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| 128 | break; |
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| 129 | case SEEK_CUR: |
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| 130 | ret = fh->offset + pos; |
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| 131 | break; |
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| 132 | case SEEK_END: |
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| 133 | { |
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| 134 | FILEINFO info; |
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| 135 | get_fileinfo(fh->name, &info); |
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| 136 | ret = pos + info.size; |
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| 137 | break; |
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| 138 | } |
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| 139 | default: |
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| 140 | ptr->_errno = EINVAL; |
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| 141 | return -1; |
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| 142 | }; |
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| 143 | |||
| 144 | fh->offset = ret; |
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| 145 | |||
| 146 | return( ret ); |
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| 147 | } |
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| 148 | |||
| 149 | _off_t |
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| 150 | _DEFUN (lseek, (fd, pos, whence), |
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| 151 | int fd _AND |
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| 152 | _off_t pos _AND |
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| 153 | int whence) |
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| 154 | |||
| 155 | { |
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| 156 | return _lseek_r(_REENT, fd, pos, whence); |
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| 157 | }; |
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| 158 | |||
| 159 | #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |