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rt-thread/components/external/sqlite/test/test_quota.c

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port complete SQLite-3.8.1 to RT-Thread
2013-11-17 00:17:50 +08:00
/*
** 2010 September 31
**
** 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 a VFS "shim" - a layer that sits in between the
** pager and the real VFS.
**
** This particular shim enforces a quota system on files. One or more
** database files are in a "quota group" that is defined by a GLOB
** pattern. A quota is set for the combined size of all files in the
** the group. A quota of zero means "no limit". If the total size
** of all files in the quota group is greater than the limit, then
** write requests that attempt to enlarge a file fail with SQLITE_FULL.
**
** However, before returning SQLITE_FULL, the write requests invoke
** a callback function that is configurable for each quota group.
** This callback has the opportunity to enlarge the quota. If the
** callback does enlarge the quota such that the total size of all
** files within the group is less than the new quota, then the write
** continues as if nothing had happened.
*/
#include "test_quota.h"
#include <string.h>
#include <assert.h>
/*
** For an build without mutexes, no-op the mutex calls.
*/
#if defined(SQLITE_THREADSAFE) && SQLITE_THREADSAFE==0
#define sqlite3_mutex_alloc(X) ((sqlite3_mutex*)8)
#define sqlite3_mutex_free(X)
#define sqlite3_mutex_enter(X)
#define sqlite3_mutex_try(X) SQLITE_OK
#define sqlite3_mutex_leave(X)
#define sqlite3_mutex_held(X) ((void)(X),1)
#define sqlite3_mutex_notheld(X) ((void)(X),1)
#endif /* SQLITE_THREADSAFE==0 */
/*
** Figure out if we are dealing with Unix, Windows, or some other
** operating system. After the following block of preprocess macros,
** all of SQLITE_OS_UNIX, SQLITE_OS_WIN, and SQLITE_OS_OTHER
** will defined to either 1 or 0. One of the four will be 1. The other
** three will be 0.
*/
#if defined(SQLITE_OS_OTHER)
# if SQLITE_OS_OTHER==1
# undef SQLITE_OS_UNIX
# define SQLITE_OS_UNIX 0
# undef SQLITE_OS_WIN
# define SQLITE_OS_WIN 0
# else
# undef SQLITE_OS_OTHER
# endif
#endif
#if !defined(SQLITE_OS_UNIX) && !defined(SQLITE_OS_OTHER)
# define SQLITE_OS_OTHER 0
# ifndef SQLITE_OS_WIN
# if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) \
|| defined(__MINGW32__) || defined(__BORLANDC__)
# define SQLITE_OS_WIN 1
# define SQLITE_OS_UNIX 0
# else
# define SQLITE_OS_WIN 0
# define SQLITE_OS_UNIX 1
# endif
# else
# define SQLITE_OS_UNIX 0
# endif
#else
# ifndef SQLITE_OS_WIN
# define SQLITE_OS_WIN 0
# endif
#endif
#if SQLITE_OS_UNIX
# include <unistd.h>
#endif
#if SQLITE_OS_WIN
# include <windows.h>
# include <io.h>
#endif
/************************ Object Definitions ******************************/
/* Forward declaration of all object types */
typedef struct quotaGroup quotaGroup;
typedef struct quotaConn quotaConn;
typedef struct quotaFile quotaFile;
/*
** A "quota group" is a collection of files whose collective size we want
** to limit. Each quota group is defined by a GLOB pattern.
**
** There is an instance of the following object for each defined quota
** group. This object records the GLOB pattern that defines which files
** belong to the quota group. The object also remembers the size limit
** for the group (the quota) and the callback to be invoked when the
** sum of the sizes of the files within the group goes over the limit.
**
** A quota group must be established (using sqlite3_quota_set(...))
** prior to opening any of the database connections that access files
** within the quota group.
*/
struct quotaGroup {
const char *zPattern; /* Filename pattern to be quotaed */
sqlite3_int64 iLimit; /* Upper bound on total file size */
sqlite3_int64 iSize; /* Current size of all files */
void (*xCallback)( /* Callback invoked when going over quota */
const char *zFilename, /* Name of file whose size increases */
sqlite3_int64 *piLimit, /* IN/OUT: The current limit */
sqlite3_int64 iSize, /* Total size of all files in the group */
void *pArg /* Client data */
);
void *pArg; /* Third argument to the xCallback() */
void (*xDestroy)(void*); /* Optional destructor for pArg */
quotaGroup *pNext, **ppPrev; /* Doubly linked list of all quota objects */
quotaFile *pFiles; /* Files within this group */
};
/*
** An instance of this structure represents a single file that is part
** of a quota group. A single file can be opened multiple times. In
** order keep multiple openings of the same file from causing the size
** of the file to count against the quota multiple times, each file
** has a unique instance of this object and multiple open connections
** to the same file each point to a single instance of this object.
*/
struct quotaFile {
char *zFilename; /* Name of this file */
quotaGroup *pGroup; /* Quota group to which this file belongs */
sqlite3_int64 iSize; /* Current size of this file */
int nRef; /* Number of times this file is open */
int deleteOnClose; /* True to delete this file when it closes */
quotaFile *pNext, **ppPrev; /* Linked list of files in the same group */
};
/*
** An instance of the following object represents each open connection
** to a file that participates in quota tracking. This object is a
** subclass of sqlite3_file. The sqlite3_file object for the underlying
** VFS is appended to this structure.
*/
struct quotaConn {
sqlite3_file base; /* Base class - must be first */
quotaFile *pFile; /* The underlying file */
/* The underlying VFS sqlite3_file is appended to this object */
};
/*
** An instance of the following object records the state of an
** open file. This object is opaque to all users - the internal
** structure is only visible to the functions below.
*/
struct quota_FILE {
FILE *f; /* Open stdio file pointer */
sqlite3_int64 iOfst; /* Current offset into the file */
quotaFile *pFile; /* The file record in the quota system */
#if SQLITE_OS_WIN
char *zMbcsName; /* Full MBCS pathname of the file */
#endif
};
/************************* Global Variables **********************************/
/*
** All global variables used by this file are containing within the following
** gQuota structure.
*/
static struct {
/* The pOrigVfs is the real, original underlying VFS implementation.
** Most operations pass-through to the real VFS. This value is read-only
** during operation. It is only modified at start-time and thus does not
** require a mutex.
*/
sqlite3_vfs *pOrigVfs;
/* The sThisVfs is the VFS structure used by this shim. It is initialized
** at start-time and thus does not require a mutex
*/
sqlite3_vfs sThisVfs;
/* The sIoMethods defines the methods used by sqlite3_file objects
** associated with this shim. It is initialized at start-time and does
** not require a mutex.
**
** When the underlying VFS is called to open a file, it might return
** either a version 1 or a version 2 sqlite3_file object. This shim
** has to create a wrapper sqlite3_file of the same version. Hence
** there are two I/O method structures, one for version 1 and the other
** for version 2.
*/
sqlite3_io_methods sIoMethodsV1;
sqlite3_io_methods sIoMethodsV2;
/* True when this shim as been initialized.
*/
int isInitialized;
/* For run-time access any of the other global data structures in this
** shim, the following mutex must be held.
*/
sqlite3_mutex *pMutex;
/* List of quotaGroup objects.
*/
quotaGroup *pGroup;
} gQuota;
/************************* Utility Routines *********************************/
/*
** Acquire and release the mutex used to serialize access to the
** list of quotaGroups.
*/
static void quotaEnter(void){ sqlite3_mutex_enter(gQuota.pMutex); }
static void quotaLeave(void){ sqlite3_mutex_leave(gQuota.pMutex); }
/* Count the number of open files in a quotaGroup
*/
static int quotaGroupOpenFileCount(quotaGroup *pGroup){
int N = 0;
quotaFile *pFile = pGroup->pFiles;
while( pFile ){
if( pFile->nRef ) N++;
pFile = pFile->pNext;
}
return N;
}
/* Remove a file from a quota group.
*/
static void quotaRemoveFile(quotaFile *pFile){
quotaGroup *pGroup = pFile->pGroup;
pGroup->iSize -= pFile->iSize;
*pFile->ppPrev = pFile->pNext;
if( pFile->pNext ) pFile->pNext->ppPrev = pFile->ppPrev;
sqlite3_free(pFile);
}
/* Remove all files from a quota group. It is always the case that
** all files will be closed when this routine is called.
*/
static void quotaRemoveAllFiles(quotaGroup *pGroup){
while( pGroup->pFiles ){
assert( pGroup->pFiles->nRef==0 );
quotaRemoveFile(pGroup->pFiles);
}
}
/* If the reference count and threshold for a quotaGroup are both
** zero, then destroy the quotaGroup.
*/
static void quotaGroupDeref(quotaGroup *pGroup){
if( pGroup->iLimit==0 && quotaGroupOpenFileCount(pGroup)==0 ){
quotaRemoveAllFiles(pGroup);
*pGroup->ppPrev = pGroup->pNext;
if( pGroup->pNext ) pGroup->pNext->ppPrev = pGroup->ppPrev;
if( pGroup->xDestroy ) pGroup->xDestroy(pGroup->pArg);
sqlite3_free(pGroup);
}
}
/*
** Return TRUE if string z matches glob pattern zGlob.
**
** Globbing rules:
**
** '*' Matches any sequence of zero or more characters.
**
** '?' Matches exactly one character.
**
** [...] Matches one character from the enclosed list of
** characters.
**
** [^...] Matches one character not in the enclosed list.
**
** / Matches "/" or "\\"
**
*/
static int quotaStrglob(const char *zGlob, const char *z){
int c, c2, cx;
int invert;
int seen;
while( (c = (*(zGlob++)))!=0 ){
if( c=='*' ){
while( (c=(*(zGlob++))) == '*' || c=='?' ){
if( c=='?' && (*(z++))==0 ) return 0;
}
if( c==0 ){
return 1;
}else if( c=='[' ){
while( *z && quotaStrglob(zGlob-1,z)==0 ){
z++;
}
return (*z)!=0;
}
cx = (c=='/') ? '\\' : c;
while( (c2 = (*(z++)))!=0 ){
while( c2!=c && c2!=cx ){
c2 = *(z++);
if( c2==0 ) return 0;
}
if( quotaStrglob(zGlob,z) ) return 1;
}
return 0;
}else if( c=='?' ){
if( (*(z++))==0 ) return 0;
}else if( c=='[' ){
int prior_c = 0;
seen = 0;
invert = 0;
c = *(z++);
if( c==0 ) return 0;
c2 = *(zGlob++);
if( c2=='^' ){
invert = 1;
c2 = *(zGlob++);
}
if( c2==']' ){
if( c==']' ) seen = 1;
c2 = *(zGlob++);
}
while( c2 && c2!=']' ){
if( c2=='-' && zGlob[0]!=']' && zGlob[0]!=0 && prior_c>0 ){
c2 = *(zGlob++);
if( c>=prior_c && c<=c2 ) seen = 1;
prior_c = 0;
}else{
if( c==c2 ){
seen = 1;
}
prior_c = c2;
}
c2 = *(zGlob++);
}
if( c2==0 || (seen ^ invert)==0 ) return 0;
}else if( c=='/' ){
if( z[0]!='/' && z[0]!='\\' ) return 0;
z++;
}else{
if( c!=(*(z++)) ) return 0;
}
}
return *z==0;
}
/* Find a quotaGroup given the filename.
**
** Return a pointer to the quotaGroup object. Return NULL if not found.
*/
static quotaGroup *quotaGroupFind(const char *zFilename){
quotaGroup *p;
for(p=gQuota.pGroup; p && quotaStrglob(p->zPattern, zFilename)==0;
p=p->pNext){}
return p;
}
/* Translate an sqlite3_file* that is really a quotaConn* into
** the sqlite3_file* for the underlying original VFS.
*/
static sqlite3_file *quotaSubOpen(sqlite3_file *pConn){
quotaConn *p = (quotaConn*)pConn;
return (sqlite3_file*)&p[1];
}
/* Find a file in a quota group and return a pointer to that file.
** Return NULL if the file is not in the group.
*/
static quotaFile *quotaFindFile(
quotaGroup *pGroup, /* Group in which to look for the file */
const char *zName, /* Full pathname of the file */
int createFlag /* Try to create the file if not found */
){
quotaFile *pFile = pGroup->pFiles;
while( pFile && strcmp(pFile->zFilename, zName)!=0 ){
pFile = pFile->pNext;
}
if( pFile==0 && createFlag ){
int nName = (int)(strlen(zName) & 0x3fffffff);
pFile = (quotaFile *)sqlite3_malloc( sizeof(*pFile) + nName + 1 );
if( pFile ){
memset(pFile, 0, sizeof(*pFile));
pFile->zFilename = (char*)&pFile[1];
memcpy(pFile->zFilename, zName, nName+1);
pFile->pNext = pGroup->pFiles;
if( pGroup->pFiles ) pGroup->pFiles->ppPrev = &pFile->pNext;
pFile->ppPrev = &pGroup->pFiles;
pGroup->pFiles = pFile;
pFile->pGroup = pGroup;
}
}
return pFile;
}
/*
** Translate UTF8 to MBCS for use in fopen() calls. Return a pointer to the
** translated text.. Call quota_mbcs_free() to deallocate any memory
** used to store the returned pointer when done.
*/
static char *quota_utf8_to_mbcs(const char *zUtf8){
#if SQLITE_OS_WIN
size_t n; /* Bytes in zUtf8 */
int nWide; /* number of UTF-16 characters */
int nMbcs; /* Bytes of MBCS */
LPWSTR zTmpWide; /* The UTF16 text */
char *zMbcs; /* The MBCS text */
int codepage; /* Code page used by fopen() */
n = strlen(zUtf8);
nWide = MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, NULL, 0);
if( nWide==0 ) return 0;
zTmpWide = (LPWSTR)sqlite3_malloc( (nWide+1)*sizeof(zTmpWide[0]) );
if( zTmpWide==0 ) return 0;
MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, zTmpWide, nWide);
codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;
nMbcs = WideCharToMultiByte(codepage, 0, zTmpWide, nWide, 0, 0, 0, 0);
zMbcs = nMbcs ? (char*)sqlite3_malloc( nMbcs+1 ) : 0;
if( zMbcs ){
WideCharToMultiByte(codepage, 0, zTmpWide, nWide, zMbcs, nMbcs, 0, 0);
}
sqlite3_free(zTmpWide);
return zMbcs;
#else
return (char*)zUtf8; /* No-op on unix */
#endif
}
/*
** Deallocate any memory allocated by quota_utf8_to_mbcs().
*/
static void quota_mbcs_free(char *zOld){
#if SQLITE_OS_WIN
sqlite3_free(zOld);
#else
/* No-op on unix */
#endif
}
/************************* VFS Method Wrappers *****************************/
/*
** This is the xOpen method used for the "quota" VFS.
**
** Most of the work is done by the underlying original VFS. This method
** simply links the new file into the appropriate quota group if it is a
** file that needs to be tracked.
*/
static int quotaOpen(
sqlite3_vfs *pVfs, /* The quota VFS */
const char *zName, /* Name of file to be opened */
sqlite3_file *pConn, /* Fill in this file descriptor */
int flags, /* Flags to control the opening */
int *pOutFlags /* Flags showing results of opening */
){
int rc; /* Result code */
quotaConn *pQuotaOpen; /* The new quota file descriptor */
quotaFile *pFile; /* Corresponding quotaFile obj */
quotaGroup *pGroup; /* The group file belongs to */
sqlite3_file *pSubOpen; /* Real file descriptor */
sqlite3_vfs *pOrigVfs = gQuota.pOrigVfs; /* Real VFS */
/* If the file is not a main database file or a WAL, then use the
** normal xOpen method.
*/
if( (flags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_WAL))==0 ){
return pOrigVfs->xOpen(pOrigVfs, zName, pConn, flags, pOutFlags);
}
/* If the name of the file does not match any quota group, then
** use the normal xOpen method.
*/
quotaEnter();
pGroup = quotaGroupFind(zName);
if( pGroup==0 ){
rc = pOrigVfs->xOpen(pOrigVfs, zName, pConn, flags, pOutFlags);
}else{
/* If we get to this point, it means the file needs to be quota tracked.
*/
pQuotaOpen = (quotaConn*)pConn;
pSubOpen = quotaSubOpen(pConn);
rc = pOrigVfs->xOpen(pOrigVfs, zName, pSubOpen, flags, pOutFlags);
if( rc==SQLITE_OK ){
pFile = quotaFindFile(pGroup, zName, 1);
if( pFile==0 ){
quotaLeave();
pSubOpen->pMethods->xClose(pSubOpen);
return SQLITE_NOMEM;
}
pFile->deleteOnClose = (flags & SQLITE_OPEN_DELETEONCLOSE)!=0;
pFile->nRef++;
pQuotaOpen->pFile = pFile;
if( pSubOpen->pMethods->iVersion==1 ){
pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV1;
}else{
pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV2;
}
}
}
quotaLeave();
return rc;
}
/*
** This is the xDelete method used for the "quota" VFS.
**
** If the file being deleted is part of the quota group, then reduce
** the size of the quota group accordingly. And remove the file from
** the set of files in the quota group.
*/
static int quotaDelete(
sqlite3_vfs *pVfs, /* The quota VFS */
const char *zName, /* Name of file to be deleted */
int syncDir /* Do a directory sync after deleting */
){
int rc; /* Result code */
quotaFile *pFile; /* Files in the quota */
quotaGroup *pGroup; /* The group file belongs to */
sqlite3_vfs *pOrigVfs = gQuota.pOrigVfs; /* Real VFS */
/* Do the actual file delete */
rc = pOrigVfs->xDelete(pOrigVfs, zName, syncDir);
/* If the file just deleted is a member of a quota group, then remove
** it from that quota group.
*/
if( rc==SQLITE_OK ){
quotaEnter();
pGroup = quotaGroupFind(zName);
if( pGroup ){
pFile = quotaFindFile(pGroup, zName, 0);
if( pFile ){
if( pFile->nRef ){
pFile->deleteOnClose = 1;
}else{
quotaRemoveFile(pFile);
quotaGroupDeref(pGroup);
}
}
}
quotaLeave();
}
return rc;
}
/************************ I/O Method Wrappers *******************************/
/* xClose requests get passed through to the original VFS. But we
** also have to unlink the quotaConn from the quotaFile and quotaGroup.
** The quotaFile and/or quotaGroup are freed if they are no longer in use.
*/
static int quotaClose(sqlite3_file *pConn){
quotaConn *p = (quotaConn*)pConn;
quotaFile *pFile = p->pFile;
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
int rc;
rc = pSubOpen->pMethods->xClose(pSubOpen);
quotaEnter();
pFile->nRef--;
if( pFile->nRef==0 ){
quotaGroup *pGroup = pFile->pGroup;
if( pFile->deleteOnClose ){
gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
quotaRemoveFile(pFile);
}
quotaGroupDeref(pGroup);
}
quotaLeave();
return rc;
}
/* Pass xRead requests directory thru to the original VFS without
** further processing.
*/
static int quotaRead(
sqlite3_file *pConn,
void *pBuf,
int iAmt,
sqlite3_int64 iOfst
){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst);
}
/* Check xWrite requests to see if they expand the file. If they do,
** the perform a quota check before passing them through to the
** original VFS.
*/
static int quotaWrite(
sqlite3_file *pConn,
const void *pBuf,
int iAmt,
sqlite3_int64 iOfst
){
quotaConn *p = (quotaConn*)pConn;
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
sqlite3_int64 iEnd = iOfst+iAmt;
quotaGroup *pGroup;
quotaFile *pFile = p->pFile;
sqlite3_int64 szNew;
if( pFile->iSize<iEnd ){
pGroup = pFile->pGroup;
quotaEnter();
szNew = pGroup->iSize - pFile->iSize + iEnd;
if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
if( pGroup->xCallback ){
pGroup->xCallback(pFile->zFilename, &pGroup->iLimit, szNew,
pGroup->pArg);
}
if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
quotaLeave();
return SQLITE_FULL;
}
}
pGroup->iSize = szNew;
pFile->iSize = iEnd;
quotaLeave();
}
return pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst);
}
/* Pass xTruncate requests thru to the original VFS. If the
** success, update the file size.
*/
static int quotaTruncate(sqlite3_file *pConn, sqlite3_int64 size){
quotaConn *p = (quotaConn*)pConn;
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
int rc = pSubOpen->pMethods->xTruncate(pSubOpen, size);
quotaFile *pFile = p->pFile;
quotaGroup *pGroup;
if( rc==SQLITE_OK ){
quotaEnter();
pGroup = pFile->pGroup;
pGroup->iSize -= pFile->iSize;
pFile->iSize = size;
pGroup->iSize += size;
quotaLeave();
}
return rc;
}
/* Pass xSync requests through to the original VFS without change
*/
static int quotaSync(sqlite3_file *pConn, int flags){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xSync(pSubOpen, flags);
}
/* Pass xFileSize requests through to the original VFS but then
** update the quotaGroup with the new size before returning.
*/
static int quotaFileSize(sqlite3_file *pConn, sqlite3_int64 *pSize){
quotaConn *p = (quotaConn*)pConn;
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
quotaFile *pFile = p->pFile;
quotaGroup *pGroup;
sqlite3_int64 sz;
int rc;
rc = pSubOpen->pMethods->xFileSize(pSubOpen, &sz);
if( rc==SQLITE_OK ){
quotaEnter();
pGroup = pFile->pGroup;
pGroup->iSize -= pFile->iSize;
pFile->iSize = sz;
pGroup->iSize += sz;
quotaLeave();
*pSize = sz;
}
return rc;
}
/* Pass xLock requests through to the original VFS unchanged.
*/
static int quotaLock(sqlite3_file *pConn, int lock){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xLock(pSubOpen, lock);
}
/* Pass xUnlock requests through to the original VFS unchanged.
*/
static int quotaUnlock(sqlite3_file *pConn, int lock){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xUnlock(pSubOpen, lock);
}
/* Pass xCheckReservedLock requests through to the original VFS unchanged.
*/
static int quotaCheckReservedLock(sqlite3_file *pConn, int *pResOut){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xCheckReservedLock(pSubOpen, pResOut);
}
/* Pass xFileControl requests through to the original VFS unchanged.
*/
static int quotaFileControl(sqlite3_file *pConn, int op, void *pArg){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
int rc = pSubOpen->pMethods->xFileControl(pSubOpen, op, pArg);
#if defined(SQLITE_FCNTL_VFSNAME)
if( op==SQLITE_FCNTL_VFSNAME && rc==SQLITE_OK ){
*(char**)pArg = sqlite3_mprintf("quota/%z", *(char**)pArg);
}
#endif
return rc;
}
/* Pass xSectorSize requests through to the original VFS unchanged.
*/
static int quotaSectorSize(sqlite3_file *pConn){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xSectorSize(pSubOpen);
}
/* Pass xDeviceCharacteristics requests through to the original VFS unchanged.
*/
static int quotaDeviceCharacteristics(sqlite3_file *pConn){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xDeviceCharacteristics(pSubOpen);
}
/* Pass xShmMap requests through to the original VFS unchanged.
*/
static int quotaShmMap(
sqlite3_file *pConn, /* Handle open on database file */
int iRegion, /* Region to retrieve */
int szRegion, /* Size of regions */
int bExtend, /* True to extend file if necessary */
void volatile **pp /* OUT: Mapped memory */
){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend, pp);
}
/* Pass xShmLock requests through to the original VFS unchanged.
*/
static int quotaShmLock(
sqlite3_file *pConn, /* Database file holding the shared memory */
int ofst, /* First lock to acquire or release */
int n, /* Number of locks to acquire or release */
int flags /* What to do with the lock */
){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xShmLock(pSubOpen, ofst, n, flags);
}
/* Pass xShmBarrier requests through to the original VFS unchanged.
*/
static void quotaShmBarrier(sqlite3_file *pConn){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
pSubOpen->pMethods->xShmBarrier(pSubOpen);
}
/* Pass xShmUnmap requests through to the original VFS unchanged.
*/
static int quotaShmUnmap(sqlite3_file *pConn, int deleteFlag){
sqlite3_file *pSubOpen = quotaSubOpen(pConn);
return pSubOpen->pMethods->xShmUnmap(pSubOpen, deleteFlag);
}
/************************** Public Interfaces *****************************/
/*
** Initialize the quota VFS shim. Use the VFS named zOrigVfsName
** as the VFS that does the actual work. Use the default if
** zOrigVfsName==NULL.
**
** The quota VFS shim is named "quota". It will become the default
** VFS if makeDefault is non-zero.
**
** THIS ROUTINE IS NOT THREADSAFE. Call this routine exactly once
** during start-up.
*/
int sqlite3_quota_initialize(const char *zOrigVfsName, int makeDefault){
sqlite3_vfs *pOrigVfs;
if( gQuota.isInitialized ) return SQLITE_MISUSE;
pOrigVfs = sqlite3_vfs_find(zOrigVfsName);
if( pOrigVfs==0 ) return SQLITE_ERROR;
assert( pOrigVfs!=&gQuota.sThisVfs );
gQuota.pMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
if( !gQuota.pMutex ){
return SQLITE_NOMEM;
}
gQuota.isInitialized = 1;
gQuota.pOrigVfs = pOrigVfs;
gQuota.sThisVfs = *pOrigVfs;
gQuota.sThisVfs.xOpen = quotaOpen;
gQuota.sThisVfs.xDelete = quotaDelete;
gQuota.sThisVfs.szOsFile += sizeof(quotaConn);
gQuota.sThisVfs.zName = "quota";
gQuota.sIoMethodsV1.iVersion = 1;
gQuota.sIoMethodsV1.xClose = quotaClose;
gQuota.sIoMethodsV1.xRead = quotaRead;
gQuota.sIoMethodsV1.xWrite = quotaWrite;
gQuota.sIoMethodsV1.xTruncate = quotaTruncate;
gQuota.sIoMethodsV1.xSync = quotaSync;
gQuota.sIoMethodsV1.xFileSize = quotaFileSize;
gQuota.sIoMethodsV1.xLock = quotaLock;
gQuota.sIoMethodsV1.xUnlock = quotaUnlock;
gQuota.sIoMethodsV1.xCheckReservedLock = quotaCheckReservedLock;
gQuota.sIoMethodsV1.xFileControl = quotaFileControl;
gQuota.sIoMethodsV1.xSectorSize = quotaSectorSize;
gQuota.sIoMethodsV1.xDeviceCharacteristics = quotaDeviceCharacteristics;
gQuota.sIoMethodsV2 = gQuota.sIoMethodsV1;
gQuota.sIoMethodsV2.iVersion = 2;
gQuota.sIoMethodsV2.xShmMap = quotaShmMap;
gQuota.sIoMethodsV2.xShmLock = quotaShmLock;
gQuota.sIoMethodsV2.xShmBarrier = quotaShmBarrier;
gQuota.sIoMethodsV2.xShmUnmap = quotaShmUnmap;
sqlite3_vfs_register(&gQuota.sThisVfs, makeDefault);
return SQLITE_OK;
}
/*
** Shutdown the quota system.
**
** All SQLite database connections must be closed before calling this
** routine.
**
** THIS ROUTINE IS NOT THREADSAFE. Call this routine exactly once while
** shutting down in order to free all remaining quota groups.
*/
int sqlite3_quota_shutdown(void){
quotaGroup *pGroup;
if( gQuota.isInitialized==0 ) return SQLITE_MISUSE;
for(pGroup=gQuota.pGroup; pGroup; pGroup=pGroup->pNext){
if( quotaGroupOpenFileCount(pGroup)>0 ) return SQLITE_MISUSE;
}
while( gQuota.pGroup ){
pGroup = gQuota.pGroup;
gQuota.pGroup = pGroup->pNext;
pGroup->iLimit = 0;
assert( quotaGroupOpenFileCount(pGroup)==0 );
quotaGroupDeref(pGroup);
}
gQuota.isInitialized = 0;
sqlite3_mutex_free(gQuota.pMutex);
sqlite3_vfs_unregister(&gQuota.sThisVfs);
memset(&gQuota, 0, sizeof(gQuota));
return SQLITE_OK;
}
/*
** Create or destroy a quota group.
**
** The quota group is defined by the zPattern. When calling this routine
** with a zPattern for a quota group that already exists, this routine
** merely updates the iLimit, xCallback, and pArg values for that quota
** group. If zPattern is new, then a new quota group is created.
**
** If the iLimit for a quota group is set to zero, then the quota group
** is disabled and will be deleted when the last database connection using
** the quota group is closed.
**
** Calling this routine on a zPattern that does not exist and with a
** zero iLimit is a no-op.
**
** A quota group must exist with a non-zero iLimit prior to opening
** database connections if those connections are to participate in the
** quota group. Creating a quota group does not affect database connections
** that are already open.
*/
int sqlite3_quota_set(
const char *zPattern, /* The filename pattern */
sqlite3_int64 iLimit, /* New quota to set for this quota group */
void (*xCallback)( /* Callback invoked when going over quota */
const char *zFilename, /* Name of file whose size increases */
sqlite3_int64 *piLimit, /* IN/OUT: The current limit */
sqlite3_int64 iSize, /* Total size of all files in the group */
void *pArg /* Client data */
),
void *pArg, /* client data passed thru to callback */
void (*xDestroy)(void*) /* Optional destructor for pArg */
){
quotaGroup *pGroup;
quotaEnter();
pGroup = gQuota.pGroup;
while( pGroup && strcmp(pGroup->zPattern, zPattern)!=0 ){
pGroup = pGroup->pNext;
}
if( pGroup==0 ){
int nPattern = (int)(strlen(zPattern) & 0x3fffffff);
if( iLimit<=0 ){
quotaLeave();
return SQLITE_OK;
}
pGroup = (quotaGroup *)sqlite3_malloc( sizeof(*pGroup) + nPattern + 1 );
if( pGroup==0 ){
quotaLeave();
return SQLITE_NOMEM;
}
memset(pGroup, 0, sizeof(*pGroup));
pGroup->zPattern = (char*)&pGroup[1];
memcpy((char *)pGroup->zPattern, zPattern, nPattern+1);
if( gQuota.pGroup ) gQuota.pGroup->ppPrev = &pGroup->pNext;
pGroup->pNext = gQuota.pGroup;
pGroup->ppPrev = &gQuota.pGroup;
gQuota.pGroup = pGroup;
}
pGroup->iLimit = iLimit;
pGroup->xCallback = xCallback;
if( pGroup->xDestroy && pGroup->pArg!=pArg ){
pGroup->xDestroy(pGroup->pArg);
}
pGroup->pArg = pArg;
pGroup->xDestroy = xDestroy;
quotaGroupDeref(pGroup);
quotaLeave();
return SQLITE_OK;
}
/*
** Bring the named file under quota management. Or if it is already under
** management, update its size.
*/
int sqlite3_quota_file(const char *zFilename){
char *zFull;
sqlite3_file *fd;
int rc;
int outFlags = 0;
sqlite3_int64 iSize;
int nAlloc = gQuota.sThisVfs.szOsFile + gQuota.sThisVfs.mxPathname+2;
/* Allocate space for a file-handle and the full path for file zFilename */
fd = (sqlite3_file *)sqlite3_malloc(nAlloc);
if( fd==0 ){
rc = SQLITE_NOMEM;
}else{
zFull = &((char *)fd)[gQuota.sThisVfs.szOsFile];
rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
gQuota.sThisVfs.mxPathname+1, zFull);
}
if( rc==SQLITE_OK ){
zFull[strlen(zFull)+1] = '\0';
rc = quotaOpen(&gQuota.sThisVfs, zFull, fd,
SQLITE_OPEN_READONLY | SQLITE_OPEN_MAIN_DB, &outFlags);
if( rc==SQLITE_OK ){
fd->pMethods->xFileSize(fd, &iSize);
fd->pMethods->xClose(fd);
}else if( rc==SQLITE_CANTOPEN ){
quotaGroup *pGroup;
quotaFile *pFile;
quotaEnter();
pGroup = quotaGroupFind(zFull);
if( pGroup ){
pFile = quotaFindFile(pGroup, zFull, 0);
if( pFile ) quotaRemoveFile(pFile);
}
quotaLeave();
}
}
sqlite3_free(fd);
return rc;
}
/*
** Open a potentially quotaed file for I/O.
*/
quota_FILE *sqlite3_quota_fopen(const char *zFilename, const char *zMode){
quota_FILE *p = 0;
char *zFull = 0;
char *zFullTranslated = 0;
int rc;
quotaGroup *pGroup;
quotaFile *pFile;
zFull = (char*)sqlite3_malloc(gQuota.sThisVfs.mxPathname + 1);
if( zFull==0 ) return 0;
rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
gQuota.sThisVfs.mxPathname+1, zFull);
if( rc ) goto quota_fopen_error;
p = (quota_FILE*)sqlite3_malloc(sizeof(*p));
if( p==0 ) goto quota_fopen_error;
memset(p, 0, sizeof(*p));
zFullTranslated = quota_utf8_to_mbcs(zFull);
if( zFullTranslated==0 ) goto quota_fopen_error;
p->f = fopen(zFullTranslated, zMode);
if( p->f==0 ) goto quota_fopen_error;
quotaEnter();
pGroup = quotaGroupFind(zFull);
if( pGroup ){
pFile = quotaFindFile(pGroup, zFull, 1);
if( pFile==0 ){
quotaLeave();
goto quota_fopen_error;
}
pFile->nRef++;
p->pFile = pFile;
}
quotaLeave();
sqlite3_free(zFull);
#if SQLITE_OS_WIN
p->zMbcsName = zFullTranslated;
#endif
return p;
quota_fopen_error:
quota_mbcs_free(zFullTranslated);
sqlite3_free(zFull);
if( p && p->f ) fclose(p->f);
sqlite3_free(p);
return 0;
}
/*
** Read content from a quota_FILE
*/
size_t sqlite3_quota_fread(
void *pBuf, /* Store the content here */
size_t size, /* Size of each element */
size_t nmemb, /* Number of elements to read */
quota_FILE *p /* Read from this quota_FILE object */
){
return fread(pBuf, size, nmemb, p->f);
}
/*
** Write content into a quota_FILE. Invoke the quota callback and block
** the write if we exceed quota.
*/
size_t sqlite3_quota_fwrite(
const void *pBuf, /* Take content to write from here */
size_t size, /* Size of each element */
size_t nmemb, /* Number of elements */
quota_FILE *p /* Write to this quota_FILE objecct */
){
sqlite3_int64 iOfst;
sqlite3_int64 iEnd;
sqlite3_int64 szNew;
quotaFile *pFile;
size_t rc;
iOfst = ftell(p->f);
iEnd = iOfst + size*nmemb;
pFile = p->pFile;
if( pFile && pFile->iSize<iEnd ){
quotaGroup *pGroup = pFile->pGroup;
quotaEnter();
szNew = pGroup->iSize - pFile->iSize + iEnd;
if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
if( pGroup->xCallback ){
pGroup->xCallback(pFile->zFilename, &pGroup->iLimit, szNew,
pGroup->pArg);
}
if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
iEnd = pGroup->iLimit - pGroup->iSize + pFile->iSize;
nmemb = (size_t)((iEnd - iOfst)/size);
iEnd = iOfst + size*nmemb;
szNew = pGroup->iSize - pFile->iSize + iEnd;
}
}
pGroup->iSize = szNew;
pFile->iSize = iEnd;
quotaLeave();
}else{
pFile = 0;
}
rc = fwrite(pBuf, size, nmemb, p->f);
/* If the write was incomplete, adjust the file size and group size
** downward */
if( rc<nmemb && pFile ){
size_t nWritten = rc;
sqlite3_int64 iNewEnd = iOfst + size*nWritten;
if( iNewEnd<iEnd ) iNewEnd = iEnd;
quotaEnter();
pFile->pGroup->iSize += iNewEnd - pFile->iSize;
pFile->iSize = iNewEnd;
quotaLeave();
}
return rc;
}
/*
** Close an open quota_FILE stream.
*/
int sqlite3_quota_fclose(quota_FILE *p){
int rc;
quotaFile *pFile;
rc = fclose(p->f);
pFile = p->pFile;
if( pFile ){
quotaEnter();
pFile->nRef--;
if( pFile->nRef==0 ){
quotaGroup *pGroup = pFile->pGroup;
if( pFile->deleteOnClose ){
gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
quotaRemoveFile(pFile);
}
quotaGroupDeref(pGroup);
}
quotaLeave();
}
#if SQLITE_OS_WIN
quota_mbcs_free(p->zMbcsName);
#endif
sqlite3_free(p);
return rc;
}
/*
** Flush memory buffers for a quota_FILE to disk.
*/
int sqlite3_quota_fflush(quota_FILE *p, int doFsync){
int rc;
rc = fflush(p->f);
if( rc==0 && doFsync ){
#if SQLITE_OS_UNIX
rc = fsync(fileno(p->f));
#endif
#if SQLITE_OS_WIN
rc = _commit(_fileno(p->f));
#endif
}
return rc!=0;
}
/*
** Seek on a quota_FILE stream.
*/
int sqlite3_quota_fseek(quota_FILE *p, long offset, int whence){
return fseek(p->f, offset, whence);
}
/*
** rewind a quota_FILE stream.
*/
void sqlite3_quota_rewind(quota_FILE *p){
rewind(p->f);
}
/*
** Tell the current location of a quota_FILE stream.
*/
long sqlite3_quota_ftell(quota_FILE *p){
return ftell(p->f);
}
/*
** Test the error indicator for the given file.
*/
int sqlite3_quota_ferror(quota_FILE *p){
return ferror(p->f);
}
/*
** Truncate a file to szNew bytes.
*/
int sqlite3_quota_ftruncate(quota_FILE *p, sqlite3_int64 szNew){
quotaFile *pFile = p->pFile;
int rc;
if( (pFile = p->pFile)!=0 && pFile->iSize<szNew ){
quotaGroup *pGroup;
if( pFile->iSize<szNew ){
/* This routine cannot be used to extend a file that is under
** quota management. Only true truncation is allowed. */
return -1;
}
pGroup = pFile->pGroup;
quotaEnter();
pGroup->iSize += szNew - pFile->iSize;
quotaLeave();
}
#if SQLITE_OS_UNIX
rc = ftruncate(fileno(p->f), szNew);
#endif
#if SQLITE_OS_WIN
# if defined(__MINGW32__) && defined(SQLITE_TEST)
/* _chsize_s() is missing from MingW (as of 2012-11-06). Use
** _chsize() as a work-around for testing purposes. */
rc = _chsize(_fileno(p->f), (long)szNew);
# else
rc = _chsize_s(_fileno(p->f), szNew);
# endif
#endif
if( pFile && rc==0 ){
quotaGroup *pGroup = pFile->pGroup;
quotaEnter();
pGroup->iSize += szNew - pFile->iSize;
pFile->iSize = szNew;
quotaLeave();
}
return rc;
}
/*
** Determine the time that the given file was last modified, in
** seconds size 1970. Write the result into *pTime. Return 0 on
** success and non-zero on any kind of error.
*/
int sqlite3_quota_file_mtime(quota_FILE *p, time_t *pTime){
int rc;
#if SQLITE_OS_UNIX
struct stat buf;
rc = fstat(fileno(p->f), &buf);
#endif
#if SQLITE_OS_WIN
struct _stati64 buf;
rc = _stati64(p->zMbcsName, &buf);
#endif
if( rc==0 ) *pTime = buf.st_mtime;
return rc;
}
/*
** Return the true size of the file, as reported by the operating
** system.
*/
sqlite3_int64 sqlite3_quota_file_truesize(quota_FILE *p){
int rc;
#if SQLITE_OS_UNIX
struct stat buf;
rc = fstat(fileno(p->f), &buf);
#endif
#if SQLITE_OS_WIN
struct _stati64 buf;
rc = _stati64(p->zMbcsName, &buf);
#endif
return rc==0 ? buf.st_size : -1;
}
/*
** Return the size of the file, as it is known to the quota subsystem.
*/
sqlite3_int64 sqlite3_quota_file_size(quota_FILE *p){
return p->pFile ? p->pFile->iSize : -1;
}
/*
** Determine the amount of data in bytes available for reading
** in the given file.
*/
long sqlite3_quota_file_available(quota_FILE *p){
FILE* f = p->f;
long pos1, pos2;
int rc;
pos1 = ftell(f);
if ( pos1 < 0 ) return -1;
rc = fseek(f, 0, SEEK_END);
if ( rc != 0 ) return -1;
pos2 = ftell(f);
if ( pos2 < 0 ) return -1;
rc = fseek(f, pos1, SEEK_SET);
if ( rc != 0 ) return -1;
return pos2 - pos1;
}
/*
** Remove a managed file. Update quotas accordingly.
*/
int sqlite3_quota_remove(const char *zFilename){
char *zFull; /* Full pathname for zFilename */
size_t nFull; /* Number of bytes in zFilename */
int rc; /* Result code */
quotaGroup *pGroup; /* Group containing zFilename */
quotaFile *pFile; /* A file in the group */
quotaFile *pNextFile; /* next file in the group */
int diff; /* Difference between filenames */
char c; /* First character past end of pattern */
zFull = (char*)sqlite3_malloc(gQuota.sThisVfs.mxPathname + 1);
if( zFull==0 ) return SQLITE_NOMEM;
rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
gQuota.sThisVfs.mxPathname+1, zFull);
if( rc ){
sqlite3_free(zFull);
return rc;
}
/* Figure out the length of the full pathname. If the name ends with
** / (or \ on windows) then remove the trailing /.
*/
nFull = strlen(zFull);
if( nFull>0 && (zFull[nFull-1]=='/' || zFull[nFull-1]=='\\') ){
nFull--;
zFull[nFull] = 0;
}
quotaEnter();
pGroup = quotaGroupFind(zFull);
if( pGroup ){
for(pFile=pGroup->pFiles; pFile && rc==SQLITE_OK; pFile=pNextFile){
pNextFile = pFile->pNext;
diff = strncmp(zFull, pFile->zFilename, nFull);
if( diff==0 && ((c = pFile->zFilename[nFull])==0 || c=='/' || c=='\\') ){
if( pFile->nRef ){
pFile->deleteOnClose = 1;
}else{
rc = gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
quotaRemoveFile(pFile);
quotaGroupDeref(pGroup);
}
}
}
}
quotaLeave();
sqlite3_free(zFull);
return rc;
}
/***************************** Test Code ***********************************/
#ifdef SQLITE_TEST
#include <tcl.h>
/*
** Argument passed to a TCL quota-over-limit callback.
*/
typedef struct TclQuotaCallback TclQuotaCallback;
struct TclQuotaCallback {
Tcl_Interp *interp; /* Interpreter in which to run the script */
Tcl_Obj *pScript; /* Script to be run */
};
extern const char *sqlite3ErrName(int);
/*
** This is the callback from a quota-over-limit.
*/
static void tclQuotaCallback(
const char *zFilename, /* Name of file whose size increases */
sqlite3_int64 *piLimit, /* IN/OUT: The current limit */
sqlite3_int64 iSize, /* Total size of all files in the group */
void *pArg /* Client data */
){
TclQuotaCallback *p; /* Callback script object */
Tcl_Obj *pEval; /* Script to evaluate */
Tcl_Obj *pVarname; /* Name of variable to pass as 2nd arg */
unsigned int rnd; /* Random part of pVarname */
int rc; /* Tcl error code */
p = (TclQuotaCallback *)pArg;
if( p==0 ) return;
pVarname = Tcl_NewStringObj("::piLimit_", -1);
Tcl_IncrRefCount(pVarname);
sqlite3_randomness(sizeof(rnd), (void *)&rnd);
Tcl_AppendObjToObj(pVarname, Tcl_NewIntObj((int)(rnd&0x7FFFFFFF)));
Tcl_ObjSetVar2(p->interp, pVarname, 0, Tcl_NewWideIntObj(*piLimit), 0);
pEval = Tcl_DuplicateObj(p->pScript);
Tcl_IncrRefCount(pEval);
Tcl_ListObjAppendElement(0, pEval, Tcl_NewStringObj(zFilename, -1));
Tcl_ListObjAppendElement(0, pEval, pVarname);
Tcl_ListObjAppendElement(0, pEval, Tcl_NewWideIntObj(iSize));
rc = Tcl_EvalObjEx(p->interp, pEval, TCL_EVAL_GLOBAL);
if( rc==TCL_OK ){
Tcl_WideInt x;
Tcl_Obj *pLimit = Tcl_ObjGetVar2(p->interp, pVarname, 0, 0);
rc = Tcl_GetWideIntFromObj(p->interp, pLimit, &x);
*piLimit = x;
Tcl_UnsetVar(p->interp, Tcl_GetString(pVarname), 0);
}
Tcl_DecrRefCount(pEval);
Tcl_DecrRefCount(pVarname);
if( rc!=TCL_OK ) Tcl_BackgroundError(p->interp);
}
/*
** Destructor for a TCL quota-over-limit callback.
*/
static void tclCallbackDestructor(void *pObj){
TclQuotaCallback *p = (TclQuotaCallback*)pObj;
if( p ){
Tcl_DecrRefCount(p->pScript);
sqlite3_free((char *)p);
}
}
/*
** tclcmd: sqlite3_quota_initialize NAME MAKEDEFAULT
*/
static int test_quota_initialize(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zName; /* Name of new quota VFS */
int makeDefault; /* True to make the new VFS the default */
int rc; /* Value returned by quota_initialize() */
/* Process arguments */
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "NAME MAKEDEFAULT");
return TCL_ERROR;
}
zName = Tcl_GetString(objv[1]);
if( Tcl_GetBooleanFromObj(interp, objv[2], &makeDefault) ) return TCL_ERROR;
if( zName[0]=='\0' ) zName = 0;
/* Call sqlite3_quota_initialize() */
rc = sqlite3_quota_initialize(zName, makeDefault);
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_STATIC);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_shutdown
*/
static int test_quota_shutdown(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
int rc; /* Value returned by quota_shutdown() */
if( objc!=1 ){
Tcl_WrongNumArgs(interp, 1, objv, "");
return TCL_ERROR;
}
/* Call sqlite3_quota_shutdown() */
rc = sqlite3_quota_shutdown();
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_STATIC);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_set PATTERN LIMIT SCRIPT
*/
static int test_quota_set(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zPattern; /* File pattern to configure */
Tcl_WideInt iLimit; /* Initial quota in bytes */
Tcl_Obj *pScript; /* Tcl script to invoke to increase quota */
int rc; /* Value returned by quota_set() */
TclQuotaCallback *p; /* Callback object */
int nScript; /* Length of callback script */
void (*xDestroy)(void*); /* Optional destructor for pArg */
void (*xCallback)(const char *, sqlite3_int64 *, sqlite3_int64, void *);
/* Process arguments */
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "PATTERN LIMIT SCRIPT");
return TCL_ERROR;
}
zPattern = Tcl_GetString(objv[1]);
if( Tcl_GetWideIntFromObj(interp, objv[2], &iLimit) ) return TCL_ERROR;
pScript = objv[3];
Tcl_GetStringFromObj(pScript, &nScript);
if( nScript>0 ){
/* Allocate a TclQuotaCallback object */
p = (TclQuotaCallback *)sqlite3_malloc(sizeof(TclQuotaCallback));
if( !p ){
Tcl_SetResult(interp, (char *)"SQLITE_NOMEM", TCL_STATIC);
return TCL_OK;
}
memset(p, 0, sizeof(TclQuotaCallback));
p->interp = interp;
Tcl_IncrRefCount(pScript);
p->pScript = pScript;
xDestroy = tclCallbackDestructor;
xCallback = tclQuotaCallback;
}else{
p = 0;
xDestroy = 0;
xCallback = 0;
}
/* Invoke sqlite3_quota_set() */
rc = sqlite3_quota_set(zPattern, iLimit, xCallback, (void*)p, xDestroy);
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_STATIC);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_file FILENAME
*/
static int test_quota_file(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zFilename; /* File pattern to configure */
int rc; /* Value returned by quota_file() */
/* Process arguments */
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
return TCL_ERROR;
}
zFilename = Tcl_GetString(objv[1]);
/* Invoke sqlite3_quota_file() */
rc = sqlite3_quota_file(zFilename);
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_STATIC);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_dump
*/
static int test_quota_dump(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
Tcl_Obj *pResult;
Tcl_Obj *pGroupTerm;
Tcl_Obj *pFileTerm;
quotaGroup *pGroup;
quotaFile *pFile;
pResult = Tcl_NewObj();
quotaEnter();
for(pGroup=gQuota.pGroup; pGroup; pGroup=pGroup->pNext){
pGroupTerm = Tcl_NewObj();
Tcl_ListObjAppendElement(interp, pGroupTerm,
Tcl_NewStringObj(pGroup->zPattern, -1));
Tcl_ListObjAppendElement(interp, pGroupTerm,
Tcl_NewWideIntObj(pGroup->iLimit));
Tcl_ListObjAppendElement(interp, pGroupTerm,
Tcl_NewWideIntObj(pGroup->iSize));
for(pFile=pGroup->pFiles; pFile; pFile=pFile->pNext){
int i;
char zTemp[1000];
pFileTerm = Tcl_NewObj();
sqlite3_snprintf(sizeof(zTemp), zTemp, "%s", pFile->zFilename);
for(i=0; zTemp[i]; i++){ if( zTemp[i]=='\\' ) zTemp[i] = '/'; }
Tcl_ListObjAppendElement(interp, pFileTerm,
Tcl_NewStringObj(zTemp, -1));
Tcl_ListObjAppendElement(interp, pFileTerm,
Tcl_NewWideIntObj(pFile->iSize));
Tcl_ListObjAppendElement(interp, pFileTerm,
Tcl_NewWideIntObj(pFile->nRef));
Tcl_ListObjAppendElement(interp, pFileTerm,
Tcl_NewWideIntObj(pFile->deleteOnClose));
Tcl_ListObjAppendElement(interp, pGroupTerm, pFileTerm);
}
Tcl_ListObjAppendElement(interp, pResult, pGroupTerm);
}
quotaLeave();
Tcl_SetObjResult(interp, pResult);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_fopen FILENAME MODE
*/
static int test_quota_fopen(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zFilename; /* File pattern to configure */
const char *zMode; /* Mode string */
quota_FILE *p; /* Open string object */
char zReturn[50]; /* Name of pointer to return */
/* Process arguments */
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "FILENAME MODE");
return TCL_ERROR;
}
zFilename = Tcl_GetString(objv[1]);
zMode = Tcl_GetString(objv[2]);
p = sqlite3_quota_fopen(zFilename, zMode);
sqlite3_snprintf(sizeof(zReturn), zReturn, "%p", p);
Tcl_SetResult(interp, zReturn, TCL_VOLATILE);
return TCL_OK;
}
/* Defined in test1.c */
extern void *sqlite3TestTextToPtr(const char*);
/*
** tclcmd: sqlite3_quota_fread HANDLE SIZE NELEM
*/
static int test_quota_fread(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
char *zBuf;
int sz;
int nElem;
size_t got;
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE SIZE NELEM");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
if( Tcl_GetIntFromObj(interp, objv[2], &sz) ) return TCL_ERROR;
if( Tcl_GetIntFromObj(interp, objv[3], &nElem) ) return TCL_ERROR;
zBuf = (char*)sqlite3_malloc( sz*nElem + 1 );
if( zBuf==0 ){
Tcl_SetResult(interp, "out of memory", TCL_STATIC);
return TCL_ERROR;
}
got = sqlite3_quota_fread(zBuf, sz, nElem, p);
zBuf[got*sz] = 0;
Tcl_SetResult(interp, zBuf, TCL_VOLATILE);
sqlite3_free(zBuf);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_fwrite HANDLE SIZE NELEM CONTENT
*/
static int test_quota_fwrite(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
char *zBuf;
int sz;
int nElem;
size_t got;
if( objc!=5 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE SIZE NELEM CONTENT");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
if( Tcl_GetIntFromObj(interp, objv[2], &sz) ) return TCL_ERROR;
if( Tcl_GetIntFromObj(interp, objv[3], &nElem) ) return TCL_ERROR;
zBuf = Tcl_GetString(objv[4]);
got = sqlite3_quota_fwrite(zBuf, sz, nElem, p);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(got));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_fclose HANDLE
*/
static int test_quota_fclose(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
int rc;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
rc = sqlite3_quota_fclose(p);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_fflush HANDLE ?HARDSYNC?
*/
static int test_quota_fflush(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
int rc;
int doSync = 0;
if( objc!=2 && objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE ?HARDSYNC?");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
if( objc==3 ){
if( Tcl_GetBooleanFromObj(interp, objv[2], &doSync) ) return TCL_ERROR;
}
rc = sqlite3_quota_fflush(p, doSync);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_fseek HANDLE OFFSET WHENCE
*/
static int test_quota_fseek(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
int ofst;
const char *zWhence;
int whence;
int rc;
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE OFFSET WHENCE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
if( Tcl_GetIntFromObj(interp, objv[2], &ofst) ) return TCL_ERROR;
zWhence = Tcl_GetString(objv[3]);
if( strcmp(zWhence, "SEEK_SET")==0 ){
whence = SEEK_SET;
}else if( strcmp(zWhence, "SEEK_CUR")==0 ){
whence = SEEK_CUR;
}else if( strcmp(zWhence, "SEEK_END")==0 ){
whence = SEEK_END;
}else{
Tcl_AppendResult(interp,
"WHENCE should be SEEK_SET, SEEK_CUR, or SEEK_END", (char*)0);
return TCL_ERROR;
}
rc = sqlite3_quota_fseek(p, ofst, whence);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_rewind HANDLE
*/
static int test_quota_rewind(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
sqlite3_quota_rewind(p);
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_ftell HANDLE
*/
static int test_quota_ftell(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
sqlite3_int64 x;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
x = sqlite3_quota_ftell(p);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(x));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_ftruncate HANDLE SIZE
*/
static int test_quota_ftruncate(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
sqlite3_int64 x;
Tcl_WideInt w;
int rc;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE SIZE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
if( Tcl_GetWideIntFromObj(interp, objv[2], &w) ) return TCL_ERROR;
x = (sqlite3_int64)w;
rc = sqlite3_quota_ftruncate(p, x);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_file_size HANDLE
*/
static int test_quota_file_size(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
sqlite3_int64 x;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
x = sqlite3_quota_file_size(p);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(x));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_file_truesize HANDLE
*/
static int test_quota_file_truesize(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
sqlite3_int64 x;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
x = sqlite3_quota_file_truesize(p);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(x));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_file_mtime HANDLE
*/
static int test_quota_file_mtime(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
time_t t;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
t = 0;
sqlite3_quota_file_mtime(p, &t);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(t));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_remove FILENAME
*/
static int test_quota_remove(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zFilename; /* File pattern to configure */
int rc;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
return TCL_ERROR;
}
zFilename = Tcl_GetString(objv[1]);
rc = sqlite3_quota_remove(zFilename);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_glob PATTERN TEXT
**
** Test the glob pattern matching. Return 1 if TEXT matches PATTERN
** and return 0 if it does not.
*/
static int test_quota_glob(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
const char *zPattern; /* The glob pattern */
const char *zText; /* Text to compare agains the pattern */
int rc;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 1, objv, "PATTERN TEXT");
return TCL_ERROR;
}
zPattern = Tcl_GetString(objv[1]);
zText = Tcl_GetString(objv[2]);
rc = quotaStrglob(zPattern, zText);
Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_file_available HANDLE
**
** Return the number of bytes from the current file point to the end of
** the file.
*/
static int test_quota_file_available(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
sqlite3_int64 x;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
x = sqlite3_quota_file_available(p);
Tcl_SetObjResult(interp, Tcl_NewWideIntObj(x));
return TCL_OK;
}
/*
** tclcmd: sqlite3_quota_ferror HANDLE
**
** Return true if the file handle is in the error state.
*/
static int test_quota_ferror(
void * clientData,
Tcl_Interp *interp,
int objc,
Tcl_Obj *CONST objv[]
){
quota_FILE *p;
int x;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
x = sqlite3_quota_ferror(p);
Tcl_SetObjResult(interp, Tcl_NewIntObj(x));
return TCL_OK;
}
/*
** This routine registers the custom TCL commands defined in this
** module. This should be the only procedure visible from outside
** of this module.
*/
int Sqlitequota_Init(Tcl_Interp *interp){
static struct {
char *zName;
Tcl_ObjCmdProc *xProc;
} aCmd[] = {
{ "sqlite3_quota_initialize", test_quota_initialize },
{ "sqlite3_quota_shutdown", test_quota_shutdown },
{ "sqlite3_quota_set", test_quota_set },
{ "sqlite3_quota_file", test_quota_file },
{ "sqlite3_quota_dump", test_quota_dump },
{ "sqlite3_quota_fopen", test_quota_fopen },
{ "sqlite3_quota_fread", test_quota_fread },
{ "sqlite3_quota_fwrite", test_quota_fwrite },
{ "sqlite3_quota_fclose", test_quota_fclose },
{ "sqlite3_quota_fflush", test_quota_fflush },
{ "sqlite3_quota_fseek", test_quota_fseek },
{ "sqlite3_quota_rewind", test_quota_rewind },
{ "sqlite3_quota_ftell", test_quota_ftell },
{ "sqlite3_quota_ftruncate", test_quota_ftruncate },
{ "sqlite3_quota_file_size", test_quota_file_size },
{ "sqlite3_quota_file_truesize", test_quota_file_truesize },
{ "sqlite3_quota_file_mtime", test_quota_file_mtime },
{ "sqlite3_quota_remove", test_quota_remove },
{ "sqlite3_quota_glob", test_quota_glob },
{ "sqlite3_quota_file_available",test_quota_file_available },
{ "sqlite3_quota_ferror", test_quota_ferror },
};
int i;
for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){
Tcl_CreateObjCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0);
}
return TCL_OK;
}
#endif