| 0,0 → 1,159 |
|---|
| /* Reentrant versions of lseek system call. */ |
| |
| #include <reent.h> |
| #include <unistd.h> |
| #include <_syslist.h> |
| #include <errno.h> |
| |
| /* Some targets provides their own versions of this functions. Those |
| targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ |
| |
| #ifdef _REENT_ONLY |
| #ifndef REENTRANT_SYSCALLS_PROVIDED |
| #define REENTRANT_SYSCALLS_PROVIDED |
| #endif |
| #endif |
| |
| #ifndef REENTRANT_SYSCALLS_PROVIDED |
| |
| #pragma pack(push, 1) |
| typedef struct |
| { |
| char sec; |
| char min; |
| char hour; |
| char rsv; |
| }detime_t; |
| |
| typedef struct |
| { |
| char day; |
| char month; |
| short year; |
| }dedate_t; |
| |
| typedef struct |
| { |
| unsigned attr; |
| unsigned flags; |
| union |
| { |
| detime_t ctime; |
| unsigned cr_time; |
| }; |
| union |
| { |
| dedate_t cdate; |
| unsigned cr_date; |
| }; |
| union |
| { |
| detime_t atime; |
| unsigned acc_time; |
| }; |
| union |
| { |
| dedate_t adate; |
| unsigned acc_date; |
| }; |
| union |
| { |
| detime_t mtime; |
| unsigned mod_time; |
| }; |
| union |
| { |
| dedate_t mdate; |
| unsigned mod_date; |
| }; |
| unsigned size; |
| unsigned size_high; |
| } FILEINFO; |
| |
| #pragma pack(pop) |
| |
| |
| extern unsigned __NFiles; |
| |
| #define __handle_check( __h, __r ) \ |
| if( (__h) < 0 || (__h) > __NFiles ) { \ |
| ptr->_errno = EBADF ; \ |
| return( __r ); \ |
| } |
| |
| |
| /* |
| FUNCTION |
| <<_lseek_r>>---Reentrant version of lseek |
| |
| INDEX |
| _lseek_r |
| |
| ANSI_SYNOPSIS |
| #include <reent.h> |
| off_t _lseek_r(struct _reent *<[ptr]>, |
| int <[fd]>, off_t <[pos]>, int <[whence]>); |
| |
| TRAD_SYNOPSIS |
| #include <reent.h> |
| off_t _lseek_r(<[ptr]>, <[fd]>, <[pos]>, <[whence]>) |
| struct _reent *<[ptr]>; |
| int <[fd]>; |
| off_t <[pos]>; |
| int <[whence]>; |
| |
| DESCRIPTION |
| This is a reentrant version of <<lseek>>. It |
| takes a pointer to the global data block, which holds |
| <<errno>>. |
| */ |
| |
| _off_t |
| _DEFUN (_lseek_r, (ptr, fd, pos, whence), |
| struct _reent *ptr _AND |
| int fd _AND |
| _off_t pos _AND |
| int whence) |
| { |
| _off_t ret; |
| __file_handle *fh; |
| |
| __handle_check( fd, -1 ); |
| fh = (__file_handle*) __getOSHandle( fd ); |
| |
| switch(whence) |
| { |
| case SEEK_SET: |
| ret = pos; |
| break; |
| case SEEK_CUR: |
| ret = fh->offset + pos; |
| break; |
| case SEEK_END: |
| { |
| FILEINFO info; |
| get_fileinfo(fh->name, &info); |
| ret = pos + info.size; |
| break; |
| } |
| default: |
| ptr->_errno = EINVAL; |
| return -1; |
| }; |
| |
| fh->offset = ret; |
| |
| return( ret ); |
| } |
| |
| _off_t |
| _DEFUN (lseek, (fd, pos, whence), |
| int fd _AND |
| _off_t pos _AND |
| int whence) |
| |
| { |
| return _lseek_r(_REENT, fd, pos, whence); |
| }; |
| |
| #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |