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a2e141482cdfacfc9b13206e048634aa6335db17
yap-6.3/os/windows/uxnt.c
Vítor Santos Costa 4591e1baaf Eclipse stuff
2014-03-13 12:54:06 +00:00

1081 lines
21 KiB
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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2012, University of Amsterdam
Vu University Amsterdam
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if defined(_WIN32) || defined(__MINGW32__)
#define UNICODE 1
#define _UNICODE 1
#define _UXNT_KERNEL 1
#include "uxnt.h" /* my prototypes */
#include "utf8.c"
#include <windows.h>
#include <tchar.h>
#include <wchar.h>
#include "dirent.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#undef mkdir /* avoid conflict */
#include <direct.h>
#ifndef __LCC__ /* not delete altogether? */
#define mkdir _xos_mkdir
#endif
#include <errno.h>
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#ifdef __LCC__
#define _close close
#define _read read
#define _write write
#define _lseek lseek
#define _tell tell
#define _chdir chdir
#define _mkdir mkdir
#define _rmdir rmdir
#define _getcwd getcwd
#endif
#define XENOMAP 1
#define XENOMEM 2
#ifndef PATH_MAX
#define PATH_MAX 260
#endif
/*******************************
* ERRNO *
*******************************/
int
_xos_errno()
{ return errno;
}
/*******************************
* UTF-8 *
*******************************/
static char *
wcstoutf8(char *dest, const wchar_t *src, size_t len)
{ char *o = dest;
char *e = &o[len];
for(; *src; src++)
{ if ( o+6 > e )
{ errno = ENAMETOOLONG;
return NULL;
}
o = utf8_put_char(o, *src);
}
*o = '\0';
return dest;
}
/* length of src in UTF-8, excluding terminating EOS */
static size_t
wcutf8len(const wchar_t *src)
{ size_t len = 0;
for(; *src; src++)
{ if ( *src < 0x80 )
{ len++;
} else
{ char o[6];
char *e;
e = utf8_put_char(o, *src);
len += e-o;
}
}
return len;
}
static wchar_t *
utf8towcs(wchar_t *dest, const char *src, size_t len)
{ wchar_t *o = dest;
wchar_t *e = &o[len-1];
for( ; *src; )
{ int wc;
src = utf8_get_char(src, &wc);
if ( o >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*o++ = wc;
}
*o = 0;
return dest;
}
static size_t
utf8_strlen(const char *s, size_t len)
{ const char *e = &s[len];
unsigned int l = 0;
while(s<e)
{ int chr;
s = utf8_get_char(s, &chr);
l++;
}
return l;
}
/*******************************
* HOME *
*******************************/
static int
existsAndWriteableDir(const TCHAR *name)
{ DWORD a;
if ( (a=GetFileAttributes(name)) != 0xFFFFFFFF )
{ if ( a & FILE_ATTRIBUTE_DIRECTORY )
{ if ( !(a & FILE_ATTRIBUTE_READONLY) )
return TRUE;
}
}
return FALSE;
}
char *
_xos_home() /* expansion of ~ */
{ static char home[PATH_MAX];
static int done = FALSE;
if ( !done )
{ TCHAR h[PATH_MAX];
/* Unix, set by user */
if ( GetEnvironmentVariable(_T("HOME"), h, sizeof(h)) &&
existsAndWriteableDir(h) )
{ _xos_canonical_filenameW(h, home, sizeof(home), 0);
} else if ( GetEnvironmentVariable(_T("USERPROFILE"), h, sizeof(h)) &&
existsAndWriteableDir(h) )
{ _xos_canonical_filenameW(h, home, sizeof(home), 0);
} else
{ TCHAR d[100];
TCHAR p[PATH_MAX];
TCHAR tmp[PATH_MAX];
int haved, havep;
haved = GetEnvironmentVariable(_T("HOMEDRIVE"), d, sizeof(d));
havep = GetEnvironmentVariable(_T("HOMEPATH"), p, sizeof(p));
tmp[0] = '\0';
if ( haved && havep ) /* Windows-NT */
{ _tcscpy(tmp, d);
_tcscat(tmp, p);
} else if ( haved )
{ _tcscpy(tmp, d);
_tcscat(tmp, _T("\\"));
} else if ( havep )
{ _tcscpy(tmp, p);
} else if ( GetWindowsDirectory(tmp, sizeof(tmp)) == 0 )
{ int drv = _getdrive(); /* A=1 */
tmp[0] = drv-1+'a';
_tcscpy(&tmp[1], _T(":\\"));
}
_xos_canonical_filenameW(tmp, home, sizeof(home), 0);
}
done = TRUE;
}
return home;
}
/*******************************
* NAME CONVERSION *
*******************************/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Map a UTF-8 string in Prolog internal representation to a UNICODE string
to be used with the Windows UNICODE access functions.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
wchar_t *
_xos_os_filenameW(const char *cname, wchar_t *osname, size_t len)
{ wchar_t *s = osname;
wchar_t *e = &osname[len-1];
const char *q = cname;
s = osname;
/* /c:/ --> c:/ */
if ( q[0] == '/' && q[1] < 0x80 && isalpha(q[1]) && q[2] == ':' &&
(q[3] == '/' || q[3] == '\0') )
{ if ( s+2 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*s++ = q[1];
*s++ = ':';
q += 3;
}
if ( (q[0] == '/' || q[0] == '\\') &&
(q[1] == '/' || q[1] == '\\') ) /* deal with //host/share */
{ if ( s+1 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*s++ = '\\';
}
#if __MINGW32__
if ( q == cname && q[0] == '/' ) /* deal with /host/share in mingw32 */
{
UINT is_drive;
q++;
while (*q && *q != '/') {
if ( s+3 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*s++ = *q++;
}
s[0] = ':';
s[1] = '\\';
s[2] = '\0';
q++;
is_drive = GetDriveType( osname );
if ( is_drive != DRIVE_UNKNOWN &&
is_drive != DRIVE_NO_ROOT_DIR ) {
// we actually found a drive
s+=2;
} else {
// restart
q = cname;
s = osname;
}
}
#endif
while( *q ) /* map / --> \, delete multiple '\' */
{ if ( *q == '/' || *q == '\\' )
{ if ( s+1 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*s++ = '\\';
q++;
while(*q == '/' || *q == '\\')
q++;
} else
{ int wc;
q = utf8_get_char(q, &wc);
if ( s+2 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*s++ = wc;
}
}
while(s > osname+1 && s[-1] == '\\' ) /* delete trailing '\' */
s--;
/* d: --> d:\ */
if ( s == &osname[2] && osname[1] == ':' &&
osname[0] < 0x80 && isalpha(osname[0]) )
*s++ = '\\';
*s = '\0';
return osname;
}
char *
_xos_os_filename(const char *cname, char *osname, size_t len)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(cname, buf, PATH_MAX) )
return NULL;
return wcstoutf8(osname, buf, len);
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Transform a UNICODE Windows filename into a UTF-8 representation of the
filename in Prolog canonical representation.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
char *
_xos_canonical_filenameW(const wchar_t *spec,
char *xname, size_t len,
int flags)
{ const wchar_t *s = spec;
char *p = xname;
char *e = &xname[len];
if ( s[0] < 0x80 && isupper(s[0]) && s[1] == ':' )
{ *p++ = tolower(s[0]);
*p++ = (char)s[1];
s += 2;
}
for(; *s; s++)
{ int c = *s;
if ( c == '\\' )
{ c = '/';
} else if ( (flags&XOS_DOWNCASE) )
{ c = towlower((wchar_t)c);
}
if ( p+6 >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
p = utf8_put_char(p, c);
}
*p = '\0';
return xname;
}
char *
_xos_canonical_filename(const char *spec, char *xname, size_t len, int flags)
{ TCHAR buf[PATH_MAX];
if ( !utf8towcs(buf, spec, PATH_MAX) )
return NULL;
return _xos_canonical_filenameW(buf, xname, len, flags);
}
int
_xos_is_absolute_filename(const char *spec)
{ TCHAR buf[PATH_MAX];
_xos_os_filenameW(spec, buf, PATH_MAX);
if ( buf[1] == ':' && buf[0] < 0x80 && iswalpha(buf[0]) )
return TRUE; /* drive */
if ( buf[0] == '\\' && buf[1] == '\\' )
return TRUE; /* UNC */
return FALSE;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Get rid of possible 8+3 characters in the path. The documentation
suggests you can do that using a single FindFirstFile or
GetFullPathName, but it appears you cannot. If you like, here is the
code that doesn't work:
char *
_xos_long_file_nameW(const char *file, char *longname)
{ DWORD len;
LPTSTR fp;
if ( !(len=GetFullPathName(file, PATH_MAX, longname, &fp)) ||
len >= PATH_MAX )
strcpy(longname, file);
return longname;
}
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
TCHAR *
_xos_long_file_nameW(const TCHAR *file, TCHAR *longname, size_t len)
{ const TCHAR *i = file;
TCHAR *o = longname;
TCHAR *ok = longname;
TCHAR *e = &longname[len-1];
int changed = 0;
while(*i)
{ int dirty = FALSE;
while(*i && *i != '\\' && *i != '/' )
{ if ( *i == '~' )
dirty++;
if ( o >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*o++ = *i++;
}
if ( dirty )
{ WIN32_FIND_DATA data;
HANDLE h;
*o = '\0';
if ( (h=FindFirstFile(longname, &data)) != INVALID_HANDLE_VALUE )
{ size_t l = _tcslen(data.cFileName);
if ( ok+l >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
_tcscpy(ok, data.cFileName);
FindClose(h);
o = ok + l;
changed++;
}
}
if ( *i )
{ if ( o >= e )
{ errno = ENAMETOOLONG;
return NULL;
}
*o++ = *i++;
}
ok = o;
}
*o = '\0';
return longname;
}
char *
_xos_long_file_name_toA(const wchar_t *file, char *longname, size_t len)
{ TCHAR buf[PATH_MAX];
if ( !_xos_long_file_nameW(file, buf, PATH_MAX) )
return NULL;
return wcstoutf8(longname, buf, len);
}
char *
_xos_long_file_name(const char *file, char *longname, size_t len)
{ TCHAR in[PATH_MAX];
TCHAR out[PATH_MAX];
if ( !utf8towcs(in, file, PATH_MAX) )
return NULL;
if ( !_xos_long_file_nameW(in, out, PATH_MAX) )
return NULL;
return wcstoutf8(longname, out, len);
}
char *
_xos_absolute_filename(const char *local, char *absolute, size_t len)
{ TCHAR buf[PATH_MAX];
TCHAR *filepart;
TCHAR abs[PATH_MAX];
if ( !_xos_os_filenameW(local, buf, PATH_MAX) )
return NULL;
if ( GetFullPathName(buf, PATH_MAX, abs, &filepart) )
return _xos_canonical_filenameW(abs, absolute, len, 0);
return NULL;
}
int
_xos_same_file(const char *p1, const char *p2)
{
TCHAR buf1[PATH_MAX];
TCHAR buf2[PATH_MAX];
int rc = FALSE, found = FALSE;
if ( !_xos_os_filenameW(p1, buf1, PATH_MAX) )
return FALSE;
if ( !_xos_os_filenameW(p2, buf2, PATH_MAX) )
return FALSE;
HANDLE hFile1 = CreateFile(buf1, 0, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
HANDLE hFile2 = CreateFile(buf2, 0, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile1 != INVALID_HANDLE_VALUE &&
hFile2 != INVALID_HANDLE_VALUE) {
BY_HANDLE_FILE_INFORMATION f1, f2;
if (GetFileInformationByHandle(hFile1, &f1) &&
GetFileInformationByHandle(hFile2, &f2) ) {
rc =
f1.dwVolumeSerialNumber == f2.dwVolumeSerialNumber &&
f1.nFileIndexLow == f2.nFileIndexLow &&
f1.nFileIndexLow == f2.nFileIndexLow;
found = TRUE;
}
}
if ( hFile1 != INVALID_HANDLE_VALUE )
CloseHandle(hFile1);
if ( hFile2 != INVALID_HANDLE_VALUE )
CloseHandle(hFile2);
if (found)
return rc;
// compare by string names
// old SWI code
if ( strcmp(p1, p2) == 0 )
{ return TRUE;
} else
{ TCHAR osp1[PATH_MAX], osp2[PATH_MAX];
TCHAR abs1[PATH_MAX], abs2[PATH_MAX];
TCHAR *fp;
if ( !_xos_os_filenameW(p1, osp1, PATH_MAX) ||
!_xos_os_filenameW(p2, osp2, PATH_MAX) )
return -1; /* error */
if ( !GetFullPathName(osp1, PATH_MAX, abs1, &fp) ||
!GetFullPathName(osp2, PATH_MAX, abs2, &fp) )
return -1;
//fwprintf(stderr, _T("f1='%s'\nf2='%s'\n"), abs1, abs2);
if ( _tcsicmp(abs1, abs2) == 0 )
return TRUE;
}
return FALSE;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Apply file-name limitations to a path-name. For DOS-type filesystems,
this implies limitation to the 8+3 convention and omitting illegal
characters. NT doesn't have all this, but filenames are matched case
insensitive, so we map everything to one case. Note that both arguments
are in UTF-8 encoding!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
char *
_xos_limited_os_filename(const char *spec, char *limited)
{ const char *i = spec;
char *o = limited;
while(*i)
{ int wc;
i = utf8_get_char(i, &wc);
wc = towlower((wchar_t)wc);
o = utf8_put_char(o, wc);
}
*o = '\0';
return limited;
}
/*******************************
* FILE READ/WRITE *
*******************************/
int
_xos_open(const char *path, int access, ...)
{ va_list args;
TCHAR buf[PATH_MAX];
int mode;
va_start(args, access);
mode = va_arg(args, int);
va_end(args);
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wopen(buf, access, mode);
}
int
_xos_close(int handle)
{ return _close(handle);
}
ssize_t
_xos_read(int handle, void *buf, size_t size)
{ return _read(handle, buf, (unsigned int)size);
}
ssize_t
_xos_write(int handle, const void *buf, size_t size)
{ return _write(handle, buf, (unsigned int)size);
}
long
_xos_lseek(int handle, long offset, int whence)
{ return _lseek(handle, offset, whence);
}
long
_xos_tell(int handle)
{ return _tell(handle);
}
FILE *
_xos_fopen(const char *path, const char *mode)
{ TCHAR buf[PATH_MAX];
TCHAR m[10];
int i;
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return NULL;
for(i=0; *mode && i < sizeof(m-1); )
m[i++] = (*mode++)&0xff;
m[i] = 0;
return _wfopen(buf, m);
}
/*******************************
* FILE MANIPULATIONS *
*******************************/
int
_xos_access(const char *path, int mode)
{ TCHAR buf[PATH_MAX];
char sd_buf[512];
SECURITY_DESCRIPTOR *sd;
BOOL access_status;
DWORD desired_access = 0;
DWORD sd_size, granted_access;
HANDLE token = 0, imp_token = 0;
GENERIC_MAPPING generic_mapping;
PRIVILEGE_SET privelege_set;
DWORD priv_set_len = sizeof(PRIVILEGE_SET);
int retval = -1;
SECURITY_INFORMATION sec_info =
DACL_SECURITY_INFORMATION |
OWNER_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION;
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
if ( mode == F_OK )
return _waccess(buf, F_OK);
sd = (SECURITY_DESCRIPTOR*)&sd_buf;
if ( !GetFileSecurity(buf, sec_info, sd, sizeof(sd_buf), &sd_size) )
{ if ( GetLastError() == ERROR_INVALID_FUNCTION )
{ goto simple;
} else if ( GetLastError() != ERROR_INSUFFICIENT_BUFFER )
{ errno = ENOENT;
return -1;
}
if ( !(sd = malloc(sd_size)) )
{ errno = ENOMEM;
return -1;
}
if ( !GetFileSecurity(buf, sec_info, sd, sd_size, &sd_size) )
goto simple;
}
if ( mode & W_OK )
{ if ( _waccess(buf, W_OK ) < 0 ) /* read-only bit set */
goto out;
}
if ( !OpenThreadToken(GetCurrentThread(),
TOKEN_DUPLICATE | TOKEN_READ,
TRUE,
&token) )
{ if ( GetLastError() != ERROR_NO_TOKEN )
goto simple;
if ( !OpenProcessToken(GetCurrentProcess(),
TOKEN_DUPLICATE | TOKEN_READ,
&token) )
goto simple;
}
if ( !DuplicateToken(token,
SecurityImpersonation,
&imp_token) )
goto simple;
if (mode & R_OK) desired_access |= GENERIC_READ;
if (mode & W_OK) desired_access |= GENERIC_WRITE;
if (mode & X_OK) desired_access |= GENERIC_EXECUTE;
generic_mapping.GenericRead = FILE_GENERIC_READ;
generic_mapping.GenericWrite = FILE_GENERIC_WRITE;
generic_mapping.GenericExecute = FILE_GENERIC_EXECUTE;
generic_mapping.GenericAll = FILE_ALL_ACCESS;
MapGenericMask(&desired_access, &generic_mapping);
if ( !AccessCheck(sd,
imp_token,
desired_access,
&generic_mapping,
&privelege_set,
&priv_set_len,
&granted_access,
&access_status) )
goto simple;
if ( access_status )
retval = 0;
out:
if ( sd && (char*)sd != sd_buf ) free(sd);
if (imp_token) CloseHandle(imp_token);
if (token) CloseHandle(token);
return retval;
simple:
retval = _waccess(buf, mode);
goto out;
return FALSE;
}
int
_xos_chmod(const char *path, int mode)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wchmod(buf, mode);
}
int
_xos_remove(const char *path)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wremove(buf);
}
int
_xos_rename(const char *old, const char *new)
{ TCHAR osold[PATH_MAX];
TCHAR osnew[PATH_MAX];
if ( !_xos_os_filenameW(old, osold, PATH_MAX) ||
!_xos_os_filenameW(new, osnew, PATH_MAX) )
return -1;
if ( MoveFileEx(osold, osnew, MOVEFILE_REPLACE_EXISTING) )
return 0;
errno = EPERM;
return -1; /* TBD: map error codes */
}
int
_xos_stat(const char *path, struct _stati64 *sbuf)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wstati64(buf, sbuf);
}
int
_xos_exists(const char *path, int flags)
{ TCHAR buf[PATH_MAX];
DWORD a;
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
if ( (a=GetFileAttributes(buf)) != 0xFFFFFFFF )
{ if ( flags & _XOS_DIR )
{ if ( a & FILE_ATTRIBUTE_DIRECTORY )
return TRUE;
else
return FALSE;
}
if ( flags & _XOS_FILE )
{ if ( a & FILE_ATTRIBUTE_DIRECTORY )
return FALSE;
}
return TRUE;
}
return FALSE;
}
/*******************************
* DIRECTORIES *
*******************************/
DIR *
opendir(const char *path)
{ TCHAR buf[PATH_MAX];
DIR *dp = malloc(sizeof(DIR));
if ( !_xos_os_filenameW(path, buf, PATH_MAX-4) )
{ free(dp);
return NULL;
}
_tcscat(buf, _T("\\*.*"));
if ( !(dp->data = malloc(sizeof(WIN32_FIND_DATA))) )
{ free(dp);
errno = ENOMEM;
return NULL;
}
dp->first = 1;
dp->handle = FindFirstFile(buf, dp->data);
if ( dp->handle == INVALID_HANDLE_VALUE )
{ if ( _waccess(buf, 04) ) /* does not exist */
{ free(dp->data);
free(dp);
return NULL;
}
}
return dp;
}
int
closedir(DIR *dp)
{ if ( dp )
{ if ( dp->handle )
FindClose(dp->handle);
free(dp->data);
free(dp);
return 0;
}
return -1;
}
static struct dirent *
translate_data(DIR *dp)
{ WIN32_FIND_DATA *data;
if ( !dp->handle )
return NULL;
data = dp->data;
if ( wcstoutf8(dp->d_name, data->cFileName, sizeof(dp->d_name)) )
return dp;
return NULL;
}
struct dirent *
readdir(DIR *dp)
{ for(;;)
{ struct dirent *de;
if ( dp->first )
{ dp->first = 0;
} else
{ if ( dp->handle )
{ if ( !FindNextFile(dp->handle, dp->data) )
return NULL;
}
}
if ( (de = translate_data(dp)) )
return de;
}
return FALSE;
}
int
_xos_chdir(const char *path)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
if ( buf[0] < 0x80 && isalpha(buf[0]) && buf[1] == ':' )
{ int drv = tolower(buf[0]) - 'a' + 1;
if ( _getdrive() != drv )
{ if ( _chdrive(drv) < 0 )
return -1;
}
}
return _wchdir(buf);
}
int
_xos_mkdir(const char *path, int mode)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wmkdir(buf);
}
int
_xos_rmdir(const char *path)
{ TCHAR buf[PATH_MAX];
if ( !_xos_os_filenameW(path, buf, PATH_MAX) )
return -1;
return _wrmdir(buf);
}
char *
_xos_getcwd(char *buf, size_t len)
{ TCHAR buf0[PATH_MAX];
TCHAR buf1[PATH_MAX];
if ( _wgetcwd(buf0, sizeof(buf0)/sizeof(TCHAR)) &&
_xos_long_file_nameW(buf0, buf1, sizeof(buf0)/sizeof(TCHAR)) )
{ return _xos_canonical_filenameW(buf1, buf, len, 0);
}
return NULL;
}
/*******************************
* ENVIRONMENT *
*******************************/
size_t
_xos_getenv(const char *name, char *buf, size_t buflen)
{ TCHAR nm[PATH_MAX];
TCHAR val[PATH_MAX];
TCHAR *valp = val;
DWORD size;
if ( !utf8towcs(nm, name, PATH_MAX) )
return -1;
size = GetEnvironmentVariable(nm, valp, PATH_MAX);
if ( size > 0 )
{ size_t rc;
if ( size >= PATH_MAX )
{ if ( (valp = malloc((size+1)*sizeof(TCHAR))) == NULL )
return -1;
size = GetEnvironmentVariable(nm, valp, size+1);
}
size = wcslen(valp); /* return sometimes holds 0-bytes */
if ( wcstoutf8(buf, valp, buflen) )
rc = strlen(buf);
else
rc = wcutf8len(valp);
if ( valp != val )
free(valp);
return rc;
}
return -1;
}
int
_xos_setenv(const char *name, char *value, int overwrite)
{ TCHAR nm[PATH_MAX];
TCHAR buf[PATH_MAX];
TCHAR *val = buf;
int rc;
if ( !utf8towcs(nm, name, PATH_MAX) )
return -1;
if ( !overwrite && GetEnvironmentVariable(nm, NULL, 0) > 0 )
return 0;
if ( !utf8towcs(val, value, PATH_MAX) )
{ size_t wlen = utf8_strlen(value, strlen(value)) + 1;
if ( (val = malloc(wlen*sizeof(TCHAR))) == NULL )
return -1;
utf8towcs(val, value, wlen);
}
rc = SetEnvironmentVariable(nm, val);
if ( val != buf )
free(val);
if ( rc )
return 0;
return -1; /* TBD: convert error */
}
#endif
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