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Diffstat (limited to 'mysys/mf_dirname.c')
| -rw-r--r-- | mysys/mf_dirname.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/mysys/mf_dirname.c b/mysys/mf_dirname.c new file mode 100644 index 00000000..12fd15f8 --- /dev/null +++ b/mysys/mf_dirname.c @@ -0,0 +1,155 @@ +/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2009, 2020, MariaDB Corporation. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +#include "mysys_priv.h" +#include <m_string.h> + + /* Functions definied in this file */ + +size_t dirname_length(const char *name) +{ + register char *pos, *gpos; +#ifdef BASKSLASH_MBTAIL + CHARSET_INFO *fs= fs_character_set(); +#endif +#ifdef FN_DEVCHAR + if ((pos=(char*)strrchr(name,FN_DEVCHAR)) == 0) +#endif + pos=(char*) name-1; + + gpos= pos++; + for ( ; *pos ; pos++) /* Find last FN_LIBCHAR */ + { +#ifdef BASKSLASH_MBTAIL + uint l; + if (my_ci_use_mb(fs) && (l= my_ismbchar(fs, pos, pos + 3))) + { + pos+= l - 1; + continue; + } +#endif + if (*pos == FN_LIBCHAR || *pos == '/') + gpos=pos; + } + return (size_t) (gpos+1-(char*) name); +} + + +/* + Gives directory part of filename. Directory ends with '/' + + SYNOPSIS + dirname_part() + to Store directory name here + name Original name + to_length Store length of 'to' here + + RETURN + # Length of directory part in 'name' +*/ + +size_t dirname_part(char *to, const char *name, size_t *to_res_length) +{ + size_t length; + DBUG_ENTER("dirname_part"); + DBUG_PRINT("enter",("'%s'",name)); + + length=dirname_length(name); + *to_res_length= (size_t) (convert_dirname(to, name, name+length) - to); + DBUG_RETURN(length); +} /* dirname */ + + +/* + Convert directory name to use under this system + + SYNPOSIS + convert_dirname() + to Store result here. Must be at least of size + MY_MIN(FN_REFLEN, strlen(from) + 1) to make room + for adding FN_LIBCHAR at the end. + from Original filename. May be == to + from_end Pointer at end of filename (normally end \0) + + IMPLEMENTATION + If Windows converts '/' to '\' + Adds a FN_LIBCHAR to end if the result string if there isn't one + and the last isn't dev_char. + Copies data from 'from' until ASCII(0) for until from == from_end + If you want to use the whole 'from' string, just send NullS as the + last argument. + + If the result string is larger than FN_REFLEN -1, then it's cut. + + RETURN + Returns pointer to end \0 in to +*/ + +#ifndef FN_DEVCHAR +#define FN_DEVCHAR '\0' /* For easier code */ +#endif + +char *convert_dirname(char *to, const char *from, const char *from_end) +{ + char *to_org=to; +#ifdef BACKSLASH_MBTAIL + CHARSET_INFO *fs= fs_character_set(); +#endif + DBUG_ENTER("convert_dirname"); + + /* We use -2 here, becasue we need place for the last FN_LIBCHAR */ + if (!from_end || (from_end - from) > FN_REFLEN-2) + from_end=from+FN_REFLEN -2; + +#if FN_LIBCHAR != '/' + { + for (; from != from_end && *from ; from++) + { + if (*from == '/') + *to++= FN_LIBCHAR; + else + { +#ifdef BACKSLASH_MBTAIL + uint l; + if (my_ci_use_mb(fs) && (l= my_ismbchar(fs, from, from + 3))) + { + memmove(to, from, l); + to+= l; + from+= l - 1; + to_org= to; /* Don't look inside mbchar */ + } + else +#endif + { + *to++= *from; + } + } + } + *to=0; + } +#else + /* This is ok even if to == from, becasue we need to cut the string */ + to= strmake(to, from, (size_t) (from_end-from)); +#endif + + /* Add FN_LIBCHAR to the end of directory path */ + if (to != to_org && (to[-1] != FN_LIBCHAR && to[-1] != FN_DEVCHAR)) + { + *to++=FN_LIBCHAR; + *to=0; + } + DBUG_RETURN(to); /* Pointer to end of dir */ +} /* convert_dirname */ |