1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/SRC/test_devsym.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,357 @@
1.4 +/*
1.5 +** 2008 Jan 22
1.6 +**
1.7 +** The author disclaims copyright to this source code. In place of
1.8 +** a legal notice, here is a blessing:
1.9 +**
1.10 +** May you do good and not evil.
1.11 +** May you find forgiveness for yourself and forgive others.
1.12 +** May you share freely, never taking more than you give.
1.13 +**
1.14 +******************************************************************************
1.15 +**
1.16 +** This file contains code that modified the OS layer in order to simulate
1.17 +** different device types (by overriding the return values of the
1.18 +** xDeviceCharacteristics() and xSectorSize() methods).
1.19 +**
1.20 +** $Id: test_devsym.c,v 1.8 2008/09/12 10:22:40 danielk1977 Exp $
1.21 +*/
1.22 +#if SQLITE_TEST /* This file is used for testing only */
1.23 +
1.24 +#include "sqlite3.h"
1.25 +#include "sqliteInt.h"
1.26 +
1.27 +/*
1.28 +** Maximum pathname length supported by the devsym backend.
1.29 +*/
1.30 +#define DEVSYM_MAX_PATHNAME 512
1.31 +
1.32 +/*
1.33 +** Name used to identify this VFS.
1.34 +*/
1.35 +#define DEVSYM_VFS_NAME "devsym"
1.36 +
1.37 +typedef struct devsym_file devsym_file;
1.38 +struct devsym_file {
1.39 + sqlite3_file base;
1.40 + sqlite3_file *pReal;
1.41 +};
1.42 +
1.43 +/*
1.44 +** Method declarations for devsym_file.
1.45 +*/
1.46 +static int devsymClose(sqlite3_file*);
1.47 +static int devsymRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
1.48 +static int devsymWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64 iOfst);
1.49 +static int devsymTruncate(sqlite3_file*, sqlite3_int64 size);
1.50 +static int devsymSync(sqlite3_file*, int flags);
1.51 +static int devsymFileSize(sqlite3_file*, sqlite3_int64 *pSize);
1.52 +static int devsymLock(sqlite3_file*, int);
1.53 +static int devsymUnlock(sqlite3_file*, int);
1.54 +static int devsymCheckReservedLock(sqlite3_file*, int *);
1.55 +static int devsymFileControl(sqlite3_file*, int op, void *pArg);
1.56 +static int devsymSectorSize(sqlite3_file*);
1.57 +static int devsymDeviceCharacteristics(sqlite3_file*);
1.58 +
1.59 +/*
1.60 +** Method declarations for devsym_vfs.
1.61 +*/
1.62 +static int devsymOpen(sqlite3_vfs*, const char *, sqlite3_file*, int , int *);
1.63 +static int devsymDelete(sqlite3_vfs*, const char *zName, int syncDir);
1.64 +static int devsymAccess(sqlite3_vfs*, const char *zName, int flags, int *);
1.65 +static int devsymFullPathname(sqlite3_vfs*, const char *zName, int, char *zOut);
1.66 +#ifndef SQLITE_OMIT_LOAD_EXTENSION
1.67 +static void *devsymDlOpen(sqlite3_vfs*, const char *zFilename);
1.68 +static void devsymDlError(sqlite3_vfs*, int nByte, char *zErrMsg);
1.69 +static void *devsymDlSym(sqlite3_vfs*,void*, const char *zSymbol);
1.70 +static void devsymDlClose(sqlite3_vfs*, void*);
1.71 +#endif /* SQLITE_OMIT_LOAD_EXTENSION */
1.72 +static int devsymRandomness(sqlite3_vfs*, int nByte, char *zOut);
1.73 +static int devsymSleep(sqlite3_vfs*, int microseconds);
1.74 +static int devsymCurrentTime(sqlite3_vfs*, double*);
1.75 +
1.76 +static sqlite3_vfs devsym_vfs = {
1.77 + 1, /* iVersion */
1.78 + sizeof(devsym_file), /* szOsFile */
1.79 + DEVSYM_MAX_PATHNAME, /* mxPathname */
1.80 + 0, /* pNext */
1.81 + DEVSYM_VFS_NAME, /* zName */
1.82 + 0, /* pAppData */
1.83 + devsymOpen, /* xOpen */
1.84 + devsymDelete, /* xDelete */
1.85 + devsymAccess, /* xAccess */
1.86 + devsymFullPathname, /* xFullPathname */
1.87 +#ifndef SQLITE_OMIT_LOAD_EXTENSION
1.88 + devsymDlOpen, /* xDlOpen */
1.89 + devsymDlError, /* xDlError */
1.90 + devsymDlSym, /* xDlSym */
1.91 + devsymDlClose, /* xDlClose */
1.92 +#else
1.93 + 0, /* xDlOpen */
1.94 + 0, /* xDlError */
1.95 + 0, /* xDlSym */
1.96 + 0, /* xDlClose */
1.97 +#endif /* SQLITE_OMIT_LOAD_EXTENSION */
1.98 + devsymRandomness, /* xRandomness */
1.99 + devsymSleep, /* xSleep */
1.100 + devsymCurrentTime /* xCurrentTime */
1.101 +};
1.102 +
1.103 +static sqlite3_io_methods devsym_io_methods = {
1.104 + 1, /* iVersion */
1.105 + devsymClose, /* xClose */
1.106 + devsymRead, /* xRead */
1.107 + devsymWrite, /* xWrite */
1.108 + devsymTruncate, /* xTruncate */
1.109 + devsymSync, /* xSync */
1.110 + devsymFileSize, /* xFileSize */
1.111 + devsymLock, /* xLock */
1.112 + devsymUnlock, /* xUnlock */
1.113 + devsymCheckReservedLock, /* xCheckReservedLock */
1.114 + devsymFileControl, /* xFileControl */
1.115 + devsymSectorSize, /* xSectorSize */
1.116 + devsymDeviceCharacteristics /* xDeviceCharacteristics */
1.117 +};
1.118 +
1.119 +struct DevsymGlobal {
1.120 + sqlite3_vfs *pVfs;
1.121 + int iDeviceChar;
1.122 + int iSectorSize;
1.123 +};
1.124 +struct DevsymGlobal g = {0, 0, 512};
1.125 +
1.126 +/*
1.127 +** Close an devsym-file.
1.128 +*/
1.129 +static int devsymClose(sqlite3_file *pFile){
1.130 + devsym_file *p = (devsym_file *)pFile;
1.131 + return sqlite3OsClose(p->pReal);
1.132 +}
1.133 +
1.134 +/*
1.135 +** Read data from an devsym-file.
1.136 +*/
1.137 +static int devsymRead(
1.138 + sqlite3_file *pFile,
1.139 + void *zBuf,
1.140 + int iAmt,
1.141 + sqlite_int64 iOfst
1.142 +){
1.143 + devsym_file *p = (devsym_file *)pFile;
1.144 + return sqlite3OsRead(p->pReal, zBuf, iAmt, iOfst);
1.145 +}
1.146 +
1.147 +/*
1.148 +** Write data to an devsym-file.
1.149 +*/
1.150 +static int devsymWrite(
1.151 + sqlite3_file *pFile,
1.152 + const void *zBuf,
1.153 + int iAmt,
1.154 + sqlite_int64 iOfst
1.155 +){
1.156 + devsym_file *p = (devsym_file *)pFile;
1.157 + return sqlite3OsWrite(p->pReal, zBuf, iAmt, iOfst);
1.158 +}
1.159 +
1.160 +/*
1.161 +** Truncate an devsym-file.
1.162 +*/
1.163 +static int devsymTruncate(sqlite3_file *pFile, sqlite_int64 size){
1.164 + devsym_file *p = (devsym_file *)pFile;
1.165 + return sqlite3OsTruncate(p->pReal, size);
1.166 +}
1.167 +
1.168 +/*
1.169 +** Sync an devsym-file.
1.170 +*/
1.171 +static int devsymSync(sqlite3_file *pFile, int flags){
1.172 + devsym_file *p = (devsym_file *)pFile;
1.173 + return sqlite3OsSync(p->pReal, flags);
1.174 +}
1.175 +
1.176 +/*
1.177 +** Return the current file-size of an devsym-file.
1.178 +*/
1.179 +static int devsymFileSize(sqlite3_file *pFile, sqlite_int64 *pSize){
1.180 + devsym_file *p = (devsym_file *)pFile;
1.181 + return sqlite3OsFileSize(p->pReal, pSize);
1.182 +}
1.183 +
1.184 +/*
1.185 +** Lock an devsym-file.
1.186 +*/
1.187 +static int devsymLock(sqlite3_file *pFile, int eLock){
1.188 + devsym_file *p = (devsym_file *)pFile;
1.189 + return sqlite3OsLock(p->pReal, eLock);
1.190 +}
1.191 +
1.192 +/*
1.193 +** Unlock an devsym-file.
1.194 +*/
1.195 +static int devsymUnlock(sqlite3_file *pFile, int eLock){
1.196 + devsym_file *p = (devsym_file *)pFile;
1.197 + return sqlite3OsUnlock(p->pReal, eLock);
1.198 +}
1.199 +
1.200 +/*
1.201 +** Check if another file-handle holds a RESERVED lock on an devsym-file.
1.202 +*/
1.203 +static int devsymCheckReservedLock(sqlite3_file *pFile, int *pResOut){
1.204 + devsym_file *p = (devsym_file *)pFile;
1.205 + return sqlite3OsCheckReservedLock(p->pReal, pResOut);
1.206 +}
1.207 +
1.208 +/*
1.209 +** File control method. For custom operations on an devsym-file.
1.210 +*/
1.211 +static int devsymFileControl(sqlite3_file *pFile, int op, void *pArg){
1.212 + devsym_file *p = (devsym_file *)pFile;
1.213 + return sqlite3OsFileControl(p->pReal, op, pArg);
1.214 +}
1.215 +
1.216 +/*
1.217 +** Return the sector-size in bytes for an devsym-file.
1.218 +*/
1.219 +static int devsymSectorSize(sqlite3_file *pFile){
1.220 + return g.iSectorSize;
1.221 +}
1.222 +
1.223 +/*
1.224 +** Return the device characteristic flags supported by an devsym-file.
1.225 +*/
1.226 +static int devsymDeviceCharacteristics(sqlite3_file *pFile){
1.227 + return g.iDeviceChar;
1.228 +}
1.229 +
1.230 +/*
1.231 +** Open an devsym file handle.
1.232 +*/
1.233 +static int devsymOpen(
1.234 + sqlite3_vfs *pVfs,
1.235 + const char *zName,
1.236 + sqlite3_file *pFile,
1.237 + int flags,
1.238 + int *pOutFlags
1.239 +){
1.240 + int rc;
1.241 + devsym_file *p = (devsym_file *)pFile;
1.242 + p->pReal = (sqlite3_file *)&p[1];
1.243 + rc = sqlite3OsOpen(g.pVfs, zName, p->pReal, flags, pOutFlags);
1.244 + if( p->pReal->pMethods ){
1.245 + pFile->pMethods = &devsym_io_methods;
1.246 + }
1.247 + return rc;
1.248 +}
1.249 +
1.250 +/*
1.251 +** Delete the file located at zPath. If the dirSync argument is true,
1.252 +** ensure the file-system modifications are synced to disk before
1.253 +** returning.
1.254 +*/
1.255 +static int devsymDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
1.256 + return sqlite3OsDelete(g.pVfs, zPath, dirSync);
1.257 +}
1.258 +
1.259 +/*
1.260 +** Test for access permissions. Return true if the requested permission
1.261 +** is available, or false otherwise.
1.262 +*/
1.263 +static int devsymAccess(
1.264 + sqlite3_vfs *pVfs,
1.265 + const char *zPath,
1.266 + int flags,
1.267 + int *pResOut
1.268 +){
1.269 + return sqlite3OsAccess(g.pVfs, zPath, flags, pResOut);
1.270 +}
1.271 +
1.272 +/*
1.273 +** Populate buffer zOut with the full canonical pathname corresponding
1.274 +** to the pathname in zPath. zOut is guaranteed to point to a buffer
1.275 +** of at least (DEVSYM_MAX_PATHNAME+1) bytes.
1.276 +*/
1.277 +static int devsymFullPathname(
1.278 + sqlite3_vfs *pVfs,
1.279 + const char *zPath,
1.280 + int nOut,
1.281 + char *zOut
1.282 +){
1.283 + return sqlite3OsFullPathname(g.pVfs, zPath, nOut, zOut);
1.284 +}
1.285 +
1.286 +#ifndef SQLITE_OMIT_LOAD_EXTENSION
1.287 +/*
1.288 +** Open the dynamic library located at zPath and return a handle.
1.289 +*/
1.290 +static void *devsymDlOpen(sqlite3_vfs *pVfs, const char *zPath){
1.291 + return sqlite3OsDlOpen(g.pVfs, zPath);
1.292 +}
1.293 +
1.294 +/*
1.295 +** Populate the buffer zErrMsg (size nByte bytes) with a human readable
1.296 +** utf-8 string describing the most recent error encountered associated
1.297 +** with dynamic libraries.
1.298 +*/
1.299 +static void devsymDlError(sqlite3_vfs *pVfs, int nByte, char *zErrMsg){
1.300 + sqlite3OsDlError(g.pVfs, nByte, zErrMsg);
1.301 +}
1.302 +
1.303 +/*
1.304 +** Return a pointer to the symbol zSymbol in the dynamic library pHandle.
1.305 +*/
1.306 +static void *devsymDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol){
1.307 + return sqlite3OsDlSym(g.pVfs, pHandle, zSymbol);
1.308 +}
1.309 +
1.310 +/*
1.311 +** Close the dynamic library handle pHandle.
1.312 +*/
1.313 +static void devsymDlClose(sqlite3_vfs *pVfs, void *pHandle){
1.314 + sqlite3OsDlClose(g.pVfs, pHandle);
1.315 +}
1.316 +#endif /* SQLITE_OMIT_LOAD_EXTENSION */
1.317 +
1.318 +/*
1.319 +** Populate the buffer pointed to by zBufOut with nByte bytes of
1.320 +** random data.
1.321 +*/
1.322 +static int devsymRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
1.323 + return sqlite3OsRandomness(g.pVfs, nByte, zBufOut);
1.324 +}
1.325 +
1.326 +/*
1.327 +** Sleep for nMicro microseconds. Return the number of microseconds
1.328 +** actually slept.
1.329 +*/
1.330 +static int devsymSleep(sqlite3_vfs *pVfs, int nMicro){
1.331 + return sqlite3OsSleep(g.pVfs, nMicro);
1.332 +}
1.333 +
1.334 +/*
1.335 +** Return the current time as a Julian Day number in *pTimeOut.
1.336 +*/
1.337 +static int devsymCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){
1.338 + return sqlite3OsCurrentTime(g.pVfs, pTimeOut);
1.339 +}
1.340 +
1.341 +/*
1.342 +** This procedure registers the devsym vfs with SQLite. If the argument is
1.343 +** true, the devsym vfs becomes the new default vfs. It is the only publicly
1.344 +** available function in this file.
1.345 +*/
1.346 +void devsym_register(int iDeviceChar, int iSectorSize){
1.347 + if( g.pVfs==0 ){
1.348 + g.pVfs = sqlite3_vfs_find(0);
1.349 + devsym_vfs.szOsFile += g.pVfs->szOsFile;
1.350 + sqlite3_vfs_register(&devsym_vfs, 0);
1.351 + }
1.352 + if( iDeviceChar>=0 ){
1.353 + g.iDeviceChar = iDeviceChar;
1.354 + }
1.355 + if( iSectorSize>=0 ){
1.356 + g.iSectorSize = iSectorSize;
1.357 + }
1.358 +}
1.359 +
1.360 +#endif