/***
*dosmap.c - Maps OS errors to errno values
*
*       Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       _dosmaperr: Maps OS errors to errno values
*
*******************************************************************************/

#ifndef _MAC

#include <cruntime.h>
#include <errno.h>
#include <oscalls.h>
#include <stdlib.h>
#include <internal.h>
#include <mtdll.h>

/* This is the error table that defines the mapping between OS error
   codes and errno values */

struct errentry {
        unsigned long oscode;           /* OS return value */
        int errnocode;  /* System V error code */
};

static struct errentry errtable[] = {
        {  ERROR_INVALID_FUNCTION,       EINVAL    },  /* 1 */
        {  ERROR_FILE_NOT_FOUND,         ENOENT    },  /* 2 */
        {  ERROR_PATH_NOT_FOUND,         ENOENT    },  /* 3 */
        {  ERROR_TOO_MANY_OPEN_FILES,    EMFILE    },  /* 4 */
        {  ERROR_ACCESS_DENIED,          EACCES    },  /* 5 */
        {  ERROR_INVALID_HANDLE,         EBADF     },  /* 6 */
        {  ERROR_ARENA_TRASHED,          ENOMEM    },  /* 7 */
        {  ERROR_NOT_ENOUGH_MEMORY,      ENOMEM    },  /* 8 */
        {  ERROR_INVALID_BLOCK,          ENOMEM    },  /* 9 */
        {  ERROR_BAD_ENVIRONMENT,        E2BIG     },  /* 10 */
        {  ERROR_BAD_FORMAT,             ENOEXEC   },  /* 11 */
        {  ERROR_INVALID_ACCESS,         EINVAL    },  /* 12 */
        {  ERROR_INVALID_DATA,           EINVAL    },  /* 13 */
        {  ERROR_INVALID_DRIVE,          ENOENT    },  /* 15 */
        {  ERROR_CURRENT_DIRECTORY,      EACCES    },  /* 16 */
        {  ERROR_NOT_SAME_DEVICE,        EXDEV     },  /* 17 */
        {  ERROR_NO_MORE_FILES,          ENOENT    },  /* 18 */
        {  ERROR_LOCK_VIOLATION,         EACCES    },  /* 33 */
        {  ERROR_BAD_NETPATH,            ENOENT    },  /* 53 */
        {  ERROR_NETWORK_ACCESS_DENIED,  EACCES    },  /* 65 */
        {  ERROR_BAD_NET_NAME,           ENOENT    },  /* 67 */
        {  ERROR_FILE_EXISTS,            EEXIST    },  /* 80 */
        {  ERROR_CANNOT_MAKE,            EACCES    },  /* 82 */
        {  ERROR_FAIL_I24,               EACCES    },  /* 83 */
        {  ERROR_INVALID_PARAMETER,      EINVAL    },  /* 87 */
        {  ERROR_NO_PROC_SLOTS,          EAGAIN    },  /* 89 */
        {  ERROR_DRIVE_LOCKED,           EACCES    },  /* 108 */
        {  ERROR_BROKEN_PIPE,            EPIPE     },  /* 109 */
        {  ERROR_DISK_FULL,              ENOSPC    },  /* 112 */
        {  ERROR_INVALID_TARGET_HANDLE,  EBADF     },  /* 114 */
        {  ERROR_INVALID_HANDLE,         EINVAL    },  /* 124 */
        {  ERROR_WAIT_NO_CHILDREN,       ECHILD    },  /* 128 */
        {  ERROR_CHILD_NOT_COMPLETE,     ECHILD    },  /* 129 */
        {  ERROR_DIRECT_ACCESS_HANDLE,   EBADF     },  /* 130 */
        {  ERROR_NEGATIVE_SEEK,          EINVAL    },  /* 131 */
        {  ERROR_SEEK_ON_DEVICE,         EACCES    },  /* 132 */
        {  ERROR_DIR_NOT_EMPTY,          ENOTEMPTY },  /* 145 */
        {  ERROR_NOT_LOCKED,             EACCES    },  /* 158 */
        {  ERROR_BAD_PATHNAME,           ENOENT    },  /* 161 */
        {  ERROR_MAX_THRDS_REACHED,      EAGAIN    },  /* 164 */
        {  ERROR_LOCK_FAILED,            EACCES    },  /* 167 */
        {  ERROR_ALREADY_EXISTS,         EEXIST    },  /* 183 */
        {  ERROR_FILENAME_EXCED_RANGE,   ENOENT    },  /* 206 */
        {  ERROR_NESTING_NOT_ALLOWED,    EAGAIN    },  /* 215 */
        {  ERROR_NOT_ENOUGH_QUOTA,       ENOMEM    }    /* 1816 */
};

/* size of the table */
#define ERRTABLESIZE (sizeof(errtable)/sizeof(errtable[0]))

/* The following two constants must be the minimum and maximum
   values in the (contiguous) range of Exec Failure errors. */
#define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
#define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN

/* These are the low and high value in the range of errors that are
   access violations */
#define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
#define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED


/***
*void _dosmaperr(oserrno) - Map function number
*
*Purpose:
*       This function takes an OS error number, and maps it to the
*       corresponding errno value (based on UNIX System V values). The
*       OS error number is stored in _doserrno (and the mapped value is
*       stored in errno)
*
*Entry:
*       ULONG oserrno = OS error value
*
*Exit:
*       sets _doserrno and errno.
*
*Exceptions:
*
*******************************************************************************/

void __cdecl _dosmaperr (
        unsigned long oserrno
        )
{
        int i;

        _doserrno = oserrno;        /* set _doserrno */

        /* check the table for the OS error code */
        for (i = 0; i < ERRTABLESIZE; ++i) {
                if (oserrno == errtable[i].oscode) {
                        errno = errtable[i].errnocode;
                        return;
                }
        }

        /* The error code wasn't in the table.  We check for a range of */
        /* EACCES errors or exec failure errors (ENOEXEC).  Otherwise   */
        /* EINVAL is returned.                                          */

        if (oserrno >= MIN_EACCES_RANGE && oserrno <= MAX_EACCES_RANGE)
                errno = EACCES;
        else if (oserrno >= MIN_EXEC_ERROR && oserrno <= MAX_EXEC_ERROR)
                errno = ENOEXEC;
        else
                errno = EINVAL;
}

#ifdef _MT

/***
*int * _errno()                 - return pointer to thread's errno
*unsigned long * __doserrno()   - return pointer to thread's _doserrno
*
*Purpose:
*       _errno() returns a pointer to the _terrno field in the current
*       thread's _tiddata structure.
*       __doserrno returns a pointer to the _tdoserrno field in the current
*       thread's _tiddata structure
*
*Entry:
*       None.
*
*Exit:
*       See above.
*
*Exceptions:
*
*******************************************************************************/

int * __cdecl _errno(
        void
        )
{
        return ( &(_getptd()->_terrno) );
}

unsigned long * __cdecl __doserrno(
        void
        )
{
        return ( &(_getptd()->_tdoserrno) );
}

#endif  /* _MT */

#else  /* _MAC */


#include <cruntime.h>
#include <errno.h>
#include <internal.h>
#include <stdlib.h>
#include <macos\osutils.h>
#include <macos\files.h>
#include <macos\errors.h>

/* This is the error table that defines the mapping between Mac and
   System V error values */

struct errentry {
        short maccode;                  /* MAC return value */
        unsigned short errnocode;       /* System V error code */
};


static struct errentry errtable[] = {
        {  ioErr,        EIO     },     /*I/O error (bummers)*/
        {  paramErr,     ENOENT  },     /*error in user parameter list */
        {  dirFulErr,    ENOSPC  },     /*Directory full*/
        {  dskFulErr,    ENOSPC  },     /*disk full*/
        {  nsvErr,       ENOENT  },     /*no such volume*/
        {  bdNamErr,     EINVAL  },     /*there may be no bad names in the final system!*/
        {  fnOpnErr,     EACCES  },     /*File not open*/
        {  eofErr,       EINVAL  },     /*End of file*/
        {  posErr,       EINVAL  },     /*tried to position to before start of file (r/w)*/
        {  mFulErr,      ENOMEM  },     /*memory full (open) or file won't fit (load)*/
        {  tmfoErr,      EMFILE  },     /*too many files open*/
        {  fnfErr,       ENOENT  },     /*File not found*/
        {  wPrErr,       EACCES  },     /*diskette is write protected.*/
        {  fLckdErr,     EACCES  },     /*file is locked*/
        {  vLckdErr,     EACCES  },     /*volume is locked*/
        {  fBsyErr,      EACCES  },     /*File is busy (delete)*/
        {  dupFNErr,     EEXIST  },     /*duplicate filename (rename)*/
        {  opWrErr,      EACCES  },     /*file already open with with write permission*/
        {  rfNumErr,     EINVAL  },     /*refnum error*/
        {  gfpErr,       EINVAL  },     /*get file position error*/
        {  volOffLinErr, EINVAL  },     /*volume not on line error (was Ejected)*/
        {  permErr,      EACCES  },     /*permissions error (on file open)*/
        {  volOnLinErr,  EINVAL  },     /*drive volume already on-line at MountVol*/
        {  nsDrvErr,     EINVAL  },     /*no such drive (tried to mount a bad drive num)*/
        {  noMacDskErr,  EINVAL  },     /*not a mac diskette (sig bytes are wrong)*/
        {  extFSErr,     EINVAL  },     /*volume in question belongs to an external fs*/
        {  fsRnErr,      EINVAL  },     /*file system internal error:during rename the old entry was deleted but could not be restored.*/
        {  badMDBErr,    EINVAL  },     /*bad master directory block*/
        {  wrPermErr,    EACCES  },     /*write permissions error*/
        {  dirNFErr,     ENOENT  },     /*Directory not found*/
        {  tmwdoErr,     EMFILE  },     /*No free WDCB available*/
        {  badMovErr,    EINVAL  },     /*Move into offspring error*/
        {  wrgVolTypErr, EINVAL  },     /*Wrong volume type error [operation not supported for MFS]*/
        {  volGoneErr,   EINVAL  },     /*Server volume has been disconnected.*/
        {  fidNotFound,  EBADF   },     /*no file thread exists.*/
        {  fidExists,    EEXIST  },     /*file id already exists*/
        {  notAFileErr,  EINVAL  },     /*directory specified*/
        {  diffVolErr,   EINVAL  },     /*files on different volumes*/
        {  catChangedErr, EINVAL  },    /*the catalog has been modified*/
        {  desktopDamagedErr, EINVAL }, /*desktop database files are corrupted*/
        {  sameFileErr,  EINVAL  },     /*can't exchange a file with itself*/
        {  badFidErr,    EBADF   },     /*file id is dangling or doesn't match with the file number*/
        {  afpRangeOverlap, EACCES  },  /*locking error*/
        {  afpRangeNotLocked, EACCES }, /*unlocking error*/
        {  afpObjectTypeErr, EACCES },  /*file is a directory*/
        {  afpAccessDenied, EACCES },   /*user does not have correct acces to the file*/
};

/* size of the table */
#define ERRTABLESIZE (sizeof(errtable)/sizeof(errtable[0]))


/***
*void _dosmaperr(short macerrno) - Map function number
*
*Purpose:
*       This function takes a Mac error number, and maps it to
*       an System V error number.  The short error number is
*       stored in _doserrno, while the System V error number
*       is stored in errno.
*
*Entry:
*       short macerrno = Mac error value
*
*Exit:
*       sets _macerrno and errno.
*
*Exceptions:
*
*******************************************************************************/

void __cdecl _dosmaperr (
        short macerrno
        )
{
        int i;

        _macerrno = macerrno;       /* set _macerrno */

        /* check the table for the mac error code */
        for (i = 0; i < ERRTABLESIZE; ++i) {
                if (macerrno == errtable[i].maccode) {
                        errno = errtable[i].errnocode;
                        return;
                }
        }

        errno = EINVAL;
}

#endif  /* _MAC */