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Refactor.

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Nuno Cruces
2023-04-10 19:55:44 +01:00
parent 3a8cfd036d
commit 23ee4ccb0b
12 changed files with 204 additions and 258 deletions
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65
sqlite3/os.c
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@@ -17,20 +17,10 @@ int os_full_pathname(sqlite3_vfs *, const char *zName, int nOut, char *zOut);
struct os_file {
sqlite3_file base;
int id;
char lock;
char psow;
char syncDir;
char readOnly;
int lockTimeout;
int handle;
};
static_assert(offsetof(struct os_file, id) == 4, "Unexpected offset");
static_assert(offsetof(struct os_file, lock) == 8, "Unexpected offset");
static_assert(offsetof(struct os_file, psow) == 9, "Unexpected offset");
static_assert(offsetof(struct os_file, syncDir) == 10, "Unexpected offset");
static_assert(offsetof(struct os_file, readOnly) == 11, "Unexpected offset");
static_assert(offsetof(struct os_file, lockTimeout) == 12, "Unexpected offset");
static_assert(offsetof(struct os_file, handle) == 4, "Unexpected offset");
int os_close(sqlite3_file *);
int os_read(sqlite3_file *, void *, int iAmt, sqlite3_int64 iOfst);
@@ -39,6 +29,8 @@ int os_truncate(sqlite3_file *, sqlite3_int64 size);
int os_sync(sqlite3_file *, int flags);
int os_file_size(sqlite3_file *, sqlite3_int64 *pSize);
int os_file_control(sqlite3_file *, int op, void *pArg);
int os_sector_size(sqlite3_file *file);
int os_device_characteristics(sqlite3_file *file);
int os_lock(sqlite3_file *, int eLock);
int os_unlock(sqlite3_file *, int eLock);
@@ -46,49 +38,11 @@ int os_check_reserved_lock(sqlite3_file *, int *pResOut);
static int os_file_control_w(sqlite3_file *file, int op, void *pArg) {
struct os_file *pFile = (struct os_file *)file;
switch (op) {
case SQLITE_FCNTL_VFSNAME: {
if (op == SQLITE_FCNTL_VFSNAME) {
*(char **)pArg = sqlite3_mprintf("%s", "os");
return SQLITE_OK;
}
case SQLITE_FCNTL_LOCKSTATE: {
*(int *)pArg = pFile->lock;
return SQLITE_OK;
}
case SQLITE_FCNTL_LOCK_TIMEOUT: {
int iOld = pFile->lockTimeout;
pFile->lockTimeout = *(int *)pArg;
*(int *)pArg = iOld;
return SQLITE_OK;
}
case SQLITE_FCNTL_POWERSAFE_OVERWRITE: {
if (*(int *)pArg < 0) {
*(int *)pArg = pFile->psow;
} else {
pFile->psow = *(int *)pArg;
}
return SQLITE_OK;
}
case SQLITE_FCNTL_SIZE_HINT:
case SQLITE_FCNTL_HAS_MOVED:
return os_file_control(file, op, pArg);
}
// Consider also implementing these opcodes (in use by SQLite):
// SQLITE_FCNTL_BUSYHANDLER
// SQLITE_FCNTL_COMMIT_PHASETWO
// SQLITE_FCNTL_PDB
// SQLITE_FCNTL_PRAGMA
// SQLITE_FCNTL_SYNC
return SQLITE_NOTFOUND;
}
static int os_sector_size(sqlite3_file *file) {
return SQLITE_DEFAULT_SECTOR_SIZE;
}
static int os_device_characteristics(sqlite3_file *file) {
struct os_file *pFile = (struct os_file *)file;
return pFile->psow ? SQLITE_IOCAP_POWERSAFE_OVERWRITE : 0;
return os_file_control(file, op, pArg);
}
static int os_open_w(sqlite3_vfs *vfs, sqlite3_filename zName,
@@ -114,12 +68,7 @@ static int os_open_w(sqlite3_vfs *vfs, sqlite3_filename zName,
return rc;
}
struct os_file *pFile = (struct os_file *)file;
pFile->base.pMethods = &os_io;
if (flags & SQLITE_OPEN_MAIN_DB) {
pFile->psow =
sqlite3_uri_boolean(zName, "psow", SQLITE_POWERSAFE_OVERWRITE);
}
file->pMethods = &os_io;
return SQLITE_OK;
}