rename.c

C标准库源代码

/***
*rename.c - rename file
*
*       Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Defines rename() - rename a file
*
*******************************************************************************/

#ifndef _MAC

#include <cruntime.h>
#include <oscalls.h>
#include <internal.h>
#include <io.h>
#include <tchar.h>

/***
*int rename(oldname, newname) - rename a file
*
*Purpose:
*       Renames a file to a new name -- no file with new name must
*       currently exist.
*
*Entry:
*       _TSCHAR *oldname -      name of file to rename
*       _TSCHAR *newname -      new name for file
*
*Exit:
*       returns 0 if successful
*       returns not 0 and sets errno if not successful
*
*Exceptions:
*
*******************************************************************************/

int __cdecl _trename (
        const _TSCHAR *oldname,
        const _TSCHAR *newname
        )
{
        ULONG dosretval;

        /* ask OS to move file */

        if (!MoveFile((LPTSTR)oldname, (LPTSTR)newname))
            dosretval = GetLastError();
        else
            dosretval = 0;

        if (dosretval) {
            /* error occured -- map error code and return */
            _dosmaperr(dosretval);
            return -1;
        }

        return 0;
}

#else  /* _MAC */


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

/***
*int rename(oldname, newname) - rename a file
*
*Purpose:
*       Renames a file to a new name -- no file with new name must
*       currently exist.
*
*Entry:
*       char *oldname -         name of file to rename
*       char *newname -         new name for file
*
*Exit:
*       returns 0 if successful
*       returns not 0 and sets errno if not successful
*
*Exceptions:
*
*******************************************************************************/
void __getdirandname(char *szdir, char *szname, const char *szpath);
int __srename ( const char *oldname, const char *newname);
int __accesspath (const char *dirname, const char *filename);

int __cdecl rename (
        const char *oldname,
        const char *newname
        )
{
        /* ask OS to move file */
        HParamBlockRec hparamBlock;
        char szOldName[32];       //old file name
        char szOldDir[256];       //old dir name
        char szNewName[32];       //new file name
        char szNewDir[256];       //new dir name
        char st[256];             //temp array for p-c string convertion
        char st2[256];            //temp array for p-c string conversion
        char szT[9];              //temp file name
        OSErr osErr;
        CMovePBRec cmovePB;
        int fTemp = 0;
        char *pch;
        char *pchOld;

        pchOld = strrchr(oldname, ':');
        if ( (pchOld!= NULL) && (*(pchOld+1) == '\0') &&
             (strchr(oldname, ':') == strrchr(oldname, ':')) )
        {
            /* rename a volume*/
            pch = strrchr(newname, ':');
            if (pch != NULL && *(pch+1) != '\0')
            {
                /* not rename to another volume name*/
                errno = EINVAL;
                return -1;
            }
            else if (pch != NULL && *(pch+1) == '\0')
            {
                osErr = __srename(oldname, newname);
                if (osErr)
                {
                    _dosmaperr(osErr);
                    return -1;
                }
                    return 0;
            }
            else if (pch == NULL)
            {
                strcpy(szNewName, newname);
                strcat(szNewName, ":");
                osErr = __srename(oldname, szNewName);
                if (osErr)
                {
                    _dosmaperr(osErr);
                    return -1;
                }
                return 0;
            }
        }

        /*Separate file name and directory*/
        __getdirandname(szOldDir, szOldName, oldname);
        __getdirandname(szNewDir, szNewName, newname);
        if (strcmp(szNewName, "")==0)
        {
            errno = EINVAL;
            return -1;
        }

        /*if same dir*/
        if (strcmp(szNewDir, szOldDir)==0 )
        {
            osErr = __srename(oldname, newname);
            if (osErr)
            {
                /* error occured -- map error code and return */
                _dosmaperr(osErr);
                return -1;
            }
            return 0;
        }

        /*if new directory didn't supplied, getcwd*/
        if (!*szNewDir)
        {
            _getcwd(szNewDir, 255);
        }


        /*if same name*/
        if (strcmp(szNewName, szOldName)==0 )
        {
            /*just move*/
            strcpy(st, oldname);
            strcpy(st2, szNewDir);
            cmovePB.ioNamePtr = _c2pstr(st);
            cmovePB.ioVRefNum = 0;
            cmovePB.ioNewName =_c2pstr(st2);
            cmovePB.ioNewDirID = 0;
            cmovePB.ioDirID = 0;
            osErr = PBCatMoveSync(&cmovePB);
            if (osErr)
            {
                /* error occured -- map error code and return */
                if (osErr == nsvErr || osErr == bdNamErr)
                {
                    errno = EXDEV;
                    _macerrno = osErr;
                }
                else
                    _dosmaperr(osErr);
                    return -1;
            }
                return 0;
        }

        osErr = __accesspath(szOldDir, szNewName);
        if (osErr != fnfErr)
        {
            /* rename the file to a temp name */
            strcpy(st, szOldDir);
            strcpy(szT, "fnXXXXXX");
            if (_mktemp(szT)!=NULL)
            {
                strcat(st, szT);
                fTemp = 1;
            }
        }
        else
        {
            *st='\0';
            if (*szOldDir)
            {
                strcpy(st, szOldDir);
            }
            strcat(st, szNewName);
        }
        osErr = __srename(oldname, st);
        if (osErr)
        {
            _dosmaperr(osErr);
            return -1;
        }

        strcpy(st2, szNewDir);
        /* move renamed file to new dir */
        cmovePB.ioNamePtr = _c2pstr(st);
        cmovePB.ioVRefNum = 0;
        cmovePB.ioNewName =_c2pstr(st2);
        cmovePB.ioNewDirID = 0;
        cmovePB.ioDirID = 0;
        osErr = PBCatMoveSync(&cmovePB);
        if (osErr) {
            /* error occured -- rename oldname back */
            strcpy(st2, oldname);
            hparamBlock.ioParam.ioNamePtr = st;
            hparamBlock.ioParam.ioVRefNum = 0;
            hparamBlock.ioParam.ioMisc = _c2pstr(st2);
            hparamBlock.fileParam.ioDirID = 0;
            PBHRenameSync(&hparamBlock);
            if (osErr == nsvErr || osErr == bdNamErr)
            {
                errno=EXDEV;
                _macerrno = osErr;
            }
            else
                _dosmaperr(osErr);
                return -1;
        }

        /* rename it to the new name in new dir*/
        if (fTemp)
        {
            strcpy(st, szNewDir);
            strcat(st, szT);
            osErr = __srename(st, newname);
            if (osErr)
            {
                _dosmaperr(osErr);
                remove(st);
                return -1;
            }
        }
        return 0;
}



void __getdirandname (
        char *szdir,
        char *szname,
        const char *szpath
        )
{
        char *pch;

        pch = strrchr(szpath, ':');
        if (pch)
        {
            strcpy(szname, pch+1);
            strncpy(szdir, szpath, (pch - szpath)+1);
            szdir[(pch-szpath)+1]='\0';
        }
        else //no ':'
        {
            strcpy(szname, szpath);
            *szdir = '\0';
        }
}

int __srename (
        const char *oldname,
        const char *newname
        )
{
        /* ask OS to move file */
        HParamBlockRec hparamBlock;
        char stOld[256];
        char stNew[256];
        OSErr osErr;

        strcpy(stOld, oldname);
        strcpy(stNew, newname);
        hparamBlock.ioParam.ioNamePtr = _c2pstr(stOld);
        hparamBlock.ioParam.ioVRefNum = 0;
        hparamBlock.ioParam.ioMisc = _c2pstr(stNew);
        hparamBlock.fileParam.ioDirID = 0;
        osErr = PBHRenameSync(&hparamBlock);
        return osErr;
}

int __accesspath (
        const char *dirname,
        const char *filename
        )
{
        CInfoPBRec cinfoPB;
        OSErr osErr;
        char szBuf[256];

        szBuf[0]='\0';
        if (*dirname)
        {
            strcpy(szBuf, dirname);
        }
        strcat(szBuf, filename);
        cinfoPB.hFileInfo.ioNamePtr = _c2pstr(szBuf);
        cinfoPB.hFileInfo.ioFDirIndex = 0;
        cinfoPB.hFileInfo.ioVRefNum = 0;
        cinfoPB.hFileInfo.ioDirID = 0;
        osErr = PBGetCatInfoSync(&cinfoPB);
        if (osErr)
        {
            return osErr;
        }
        else
        {
            /* file or dir ? */
            if (cinfoPB.hFileInfo.ioFlAttrib & 0x10)
            { /*dir*/
                return 1;
            }
            else
            {
                return 0;
            }
        }
}

#endif  /* _MAC */