mf_format.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:4k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA */
- #include "mysys_priv.h"
- #include <m_string.h>
- #ifdef HAVE_REALPATH
- #include <sys/param.h>
- #include <sys/stat.h>
- #endif
- /* format a filename with replace of library and extension */
- /* params to and name may be identicall */
- /* function doesn't change name if name != to */
- /* Flag may be: 1 replace filenames library with 'dsk' */
- /* 2 replace extension with 'form' */
- /* 4 Unpack filename (replace ~ with home) */
- /* 8 Pack filename as short as possibly */
- /* 16 Resolve symbolic links for filename */
- /* 32 Resolve filename to full path */
- /* 64 Return NULL if too long path */
- #ifdef SCO
- #define BUFF_LEN 4097
- #else
- #ifdef MAXPATHLEN
- #define BUFF_LEN MAXPATHLEN
- #else
- #define BUFF_LEN FN_LEN
- #endif
- #endif
- my_string fn_format(my_string to, const char *name, const char *dsk,
- const char *form, int flag)
- {
- reg1 uint length;
- char dev[FN_REFLEN], buff[BUFF_LEN], *pos, *startpos;
- const char *ext;
- DBUG_ENTER("fn_format");
- DBUG_PRINT("enter",("name: %s dsk: %s form: %s flag: %d",
- name,dsk,form,flag));
- /* Kopiera & skippa enheten */
- name+=(length=dirname_part(dev,(startpos=(my_string) name)));
- if (length == 0 || flag & 1)
- {
- (void) strmake(dev,dsk, sizeof(dev) - 2);
- /* Use given directory */
- convert_dirname(dev); /* Fix to this OS */
- }
- if (flag & 8)
- pack_dirname(dev,dev); /* Put in ./.. and ~/.. */
- if (flag & 4)
- (void) unpack_dirname(dev,dev); /* Replace ~/.. with dir */
- if ((pos=strchr(name,FN_EXTCHAR)) != NullS)
- {
- if ((flag & 2) == 0) /* Skall vi byta extension ? */
- {
- length=strlength(name); /* Old extension */
- ext = "";
- }
- else
- {
- length=(uint) (pos-(char*) name); /* Change extension */
- ext= form;
- }
- }
- else
- {
- length=strlength(name); /* Har ingen ext- tag nya */
- ext=form;
- }
- if (strlen(dev)+length+strlen(ext) >= FN_REFLEN || length >= FN_LEN )
- { /* To long path, return original */
- uint tmp_length;
- if (flag & 64)
- return 0;
- tmp_length=strlength(startpos);
- DBUG_PRINT("error",("dev: '%s' ext: '%s' length: %d",dev,ext,length));
- (void) strmake(to,startpos,min(tmp_length,FN_REFLEN-1));
- }
- else
- {
- if (to == startpos)
- {
- bmove(buff,(char*) name,length); /* Save name for last copy */
- name=buff;
- }
- pos=strmake(strmov(to,dev),name,length);
- #ifdef FN_UPPER_CASE
- caseup_str(to);
- #endif
- #ifdef FN_LOWER_CASE
- casedn_str(to);
- #endif
- (void) strmov(pos,ext); /* Don't convert extension */
- }
- /* Purify gives a lot of UMR errors when using realpath */
- #if defined(HAVE_REALPATH) && !defined(HAVE_purify) && !defined(HAVE_BROKEN_REALPATH)
- if (flag & 16)
- {
- struct stat stat_buff;
- if (flag & 32 || (!lstat(to,&stat_buff) && S_ISLNK(stat_buff.st_mode)))
- {
- if (realpath(to,buff))
- strmake(to,buff,FN_REFLEN-1);
- }
- }
- #endif
- DBUG_RETURN (to);
- } /* fn_format */
- /*
- strlength(const string str)
- Return length of string with end-space:s not counted.
- */
- size_s strlength(const char *str)
- {
- reg1 my_string pos;
- reg2 my_string found;
- DBUG_ENTER("strlength");
- pos=found=(char*) str;
- while (*pos)
- {
- if (*pos != ' ')
- {
- while (*++pos && *pos != ' ') {};
- if (!*pos)
- {
- found=pos; /* String ends here */
- break;
- }
- }
- found=pos;
- while (*++pos == ' ') {};
- }
- DBUG_RETURN((size_s) (found-(char*) str));
- } /* strlength */