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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
){
struct _finddata_t data;
LPDIR dirp = (LPDIR)sqlite3_malloc(sizeof(DIR));
SIZE_T namesize = sizeof(data.name) / sizeof(data.name[0]);
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(struct _finddata_t));
_snprintf(data.name, namesize, "%s\\*", dirname);
dirp->d_handle = _findfirst(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(struct _finddata_t));
if( _findnext(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;
strncpy(dirp->d_first.d_name, data.name, NAME_MAX);
dirp->d_first.d_name[NAME_MAX] = '\0';
return dirp;
}
/*
** Implementation of the POSIX readdir() function using the MSVCRT.
*/
LPDIRENT readdir(
LPDIR dirp
){
struct _finddata_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(struct _finddata_t));
if( _findnext(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;
strncpy(dirp->d_next.d_name, data.name, NAME_MAX);
dirp->d_next.d_name[NAME_MAX] = '\0';
return &dirp->d_next;
}
/*
** Implementation of the POSIX readdir_r() function using the MSVCRT.
*/
INT readdir_r(
LPDIR dirp,
LPDIRENT entry,
LPDIRENT *result
){
struct _finddata_t data;
if( dirp==NULL ) return EBADF;
if( dirp->d_first.d_ino==0 ){
dirp->d_first.d_ino++;
dirp->d_next.d_ino++;
entry->d_ino = dirp->d_first.d_ino;
entry->d_attributes = dirp->d_first.d_attributes;
strncpy(entry->d_name, dirp->d_first.d_name, NAME_MAX);
entry->d_name[NAME_MAX] = '\0';
*result = entry;
return 0;
}
next:
memset(&data, 0, sizeof(struct _finddata_t));
if( _findnext(dirp->d_handle, &data)==-1 ){
*result = NULL;
return ENOENT;
}
/* TODO: Remove this block to allow hidden and/or system files. */
if( is_filtered(data) ) goto next;
entry->d_ino = (ino_t)-1; /* not available */
entry->d_attributes = data.attrib;
strncpy(entry->d_name, data.name, NAME_MAX);
entry->d_name[NAME_MAX] = '\0';
*result = entry;
return 0;
}
/*
** 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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