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/*
** 2015 November 30
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement most of the opendir() family of
** POSIX functions on Win32 using the MSVCRT.
*/
#if defined(_WIN32) && defined(_MSC_VER)
#include "test_windirent.h"
/*
** Implementation of the POSIX getenv() function using the Win32 API.
** This function is not thread-safe.
*/
const char *windirent_getenv(
const char *name
){
static char value[32768]; /* Maximum length, per MSDN */
DWORD dwSize = sizeof(value) / sizeof(char); /* Size in chars */
DWORD dwRet; /* Value returned by GetEnvironmentVariableA() */
memset(value, 0, sizeof(value));
dwRet = GetEnvironmentVariableA(name, value, dwSize);
if( dwRet==0 || dwRet>dwSize ){
/*
** The function call to GetEnvironmentVariableA() failed -OR-
** the buffer is not large enough. Either way, return NULL.
*/
return 0;
}else{
/*
** The function call to GetEnvironmentVariableA() succeeded
** -AND- the buffer contains the entire value.
*/
return value;
}
}
/*
** Implementation of the POSIX opendir() function using the MSVCRT.
*/
LPDIR opendir(
const char *dirname /* Directory name, UTF8 encoding */
){
struct _wfinddata_t data;
LPDIR dirp = (LPDIR)sqlite3_malloc(sizeof(DIR));
SIZE_T namesize = sizeof(data.name) / sizeof(data.name[0]);
wchar_t *b1;
sqlite3_int64 sz;
if( dirp==NULL ) return NULL;
memset(dirp, 0, sizeof(DIR));
/* TODO: Remove this if Unix-style root paths are not used. */
if( sqlite3_stricmp(dirname, "/")==0 ){
dirname = windirent_getenv("SystemDrive");
}
memset(&data, 0, sizeof(data));
sz = strlen(dirname);
b1 = sqlite3_malloc64( (sz+3)*sizeof(b1[0]) );
if( b1==0 ){
closedir(dirp);
return NULL;
}
sz = MultiByteToWideChar(CP_UTF8, 0, dirname, sz, b1, sz);
b1[sz++] = '\\';
b1[sz++] = '*';
b1[sz] = 0;
if( sz+1>(sqlite3_int64)namesize ){
closedir(dirp);
sqlite3_free(b1);
return NULL;
}
memcpy(data.name, b1, (sz+1)*sizeof(b1[0]));
sqlite3_free(b1);
dirp->d_handle = _wfindfirst(data.name, &data);
if( dirp->d_handle==BAD_INTPTR_T ){
closedir(dirp);
return NULL;
}
/* TODO: Remove this block to allow hidden and/or system files. */
if( is_filtered(data) ){
next:
memset(&data, 0, sizeof(data));
if( _wfindnext(dirp->d_handle, &data)==-1 ){
closedir(dirp);
return NULL;
}
/* TODO: Remove this block to allow hidden and/or system files. */
if( is_filtered(data) ) goto next;
}
dirp->d_first.d_attributes = data.attrib;
WideCharToMultiByte(CP_UTF8, 0, data.name, -1,
dirp->d_first.d_name, DIRENT_NAME_MAX, 0, 0);
return dirp;
}
/*
** Implementation of the POSIX readdir() function using the MSVCRT.
*/
LPDIRENT readdir(
LPDIR dirp
){
struct _wfinddata_t data;
if( dirp==NULL ) return NULL;
if( dirp->d_first.d_ino==0 ){
dirp->d_first.d_ino++;
dirp->d_next.d_ino++;
return &dirp->d_first;
}
next:
memset(&data, 0, sizeof(data));
if( _wfindnext(dirp->d_handle, &data)==-1 ) return NULL;
/* TODO: Remove this block to allow hidden and/or system files. */
if( is_filtered(data) ) goto next;
dirp->d_next.d_ino++;
dirp->d_next.d_attributes = data.attrib;
WideCharToMultiByte(CP_UTF8, 0, data.name, -1,
dirp->d_next.d_name, DIRENT_NAME_MAX, 0, 0);
return &dirp->d_next;
}
/*
** Implementation of the POSIX closedir() function using the MSVCRT.
*/
INT closedir(
LPDIR dirp
){
INT result = 0;
if( dirp==NULL ) return EINVAL;
if( dirp->d_handle!=NULL_INTPTR_T && dirp->d_handle!=BAD_INTPTR_T ){
result = _findclose(dirp->d_handle);
}
sqlite3_free(dirp);
return result;
}
#endif /* defined(WIN32) && defined(_MSC_VER) */
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