Analytics/SQLite/SFSQLiteStatement.m

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #if __OBJC2__
  25
  26 #import <Foundation/NSKeyedArchiver_Private.h>
  27 #import "SFSQLite.h"
  28 #import "SFSQLiteStatement.h"
  29 #import "SFObjCType.h"
  30 #import "debugging.h"
  31
  32 @interface SFSQLiteStatement ()
  33 @property (nonatomic, strong) NSMutableArray *temporaryBoundObjects;
  34 @end
  35 @implementation SFSQLiteStatement
  36
  37 @synthesize SQLite = _SQLite;
  38 @synthesize SQL = _SQL;
  39 @synthesize handle = _handle;
  40 @synthesize reset = _reset;
  41 @synthesize temporaryBoundObjects = _temporaryBoundObjects;
  42
  43 - (id)initWithSQLite:(SFSQLite *)SQLite SQL:(NSString *)SQL handle:(sqlite3_stmt *)handle {
  44     if ((self = [super init])) {
  45         _SQLite = SQLite;
  46         _SQL = SQL;
  47         _handle = handle;
  48         _reset = YES;
  49     }
  50     return self;
  51 }
  52
  53 - (void)finalizeStatement {
  54     if (!_reset) {
  55         secerror("sfsqlite: Statement not reset after last use: \"%@\"", _SQL);
  56         return;
  57     }
  58     if (sqlite3_finalize(_handle)) {
  59         secerror("sfsqlite: Error finalizing prepared statement: \"%@\"", _SQL);
  60         return;
  61     }
  62 }
  63
  64 - (void)resetAfterStepError
  65 {
  66     if (!_reset) {
  67         (void)sqlite3_reset(_handle); // we expect this to return an error
  68         (void)sqlite3_clear_bindings(_handle);
  69         [_temporaryBoundObjects removeAllObjects];
  70         _reset = YES;
  71     }
  72 }
  73
  74 - (BOOL)step {
  75     if (_reset) {
  76         _reset = NO;
  77     }
  78
  79     int rc = sqlite3_step(_handle);
  80     if ((rc & 0x00FF) == SQLITE_ROW) {
  81         return YES;
  82     } else if ((rc & 0x00FF) == SQLITE_DONE) {
  83         return NO;
  84     } else {
  85         [self resetAfterStepError];
  86         secerror("sfsqlite: Failed to step (%d): \"%@\"", rc, _SQL);
  87         return NO;
  88     }
  89 }
  90
  91 - (void)reset {
  92     if (!_reset) {
  93         if (sqlite3_reset(_handle)) {
  94             secerror("sfsqlite: Error resetting prepared statement: \"%@\"", _SQL);
  95             return;
  96         }
  97
  98         if (sqlite3_clear_bindings(_handle)) {
  99             secerror("sfsqlite: Error clearing prepared statement bindings: \"%@\"", _SQL);
 100             return;
 101         }
 102         [_temporaryBoundObjects removeAllObjects];
 103         _reset = YES;
 104     }
 105 }
 106
 107 - (void)bindInt:(SInt32)value atIndex:(NSUInteger)index {
 108     if (!_reset) {
 109         secerror("sfsqlite: Statement is not reset: \"%@\"", _SQL);
 110         return;
 111     }
 112
 113     if (sqlite3_bind_int(_handle, (int)index+1, value)) {
 114         secerror("sfsqlite: Error binding int at %ld: \"%@\"", (unsigned long)index, _SQL);
 115         return;
 116     }
 117 }
 118
 119 - (void)bindInt64:(SInt64)value atIndex:(NSUInteger)index {
 120     if (!_reset) {
 121         secerror("sfsqlite: Statement is not reset: \"%@\"", _SQL);
 122         return;
 123     }
 124
 125     if (sqlite3_bind_int64(_handle, (int)index+1, value)) {
 126         secerror("sfsqlite: Error binding int64 at %ld: \"%@\"", (unsigned long)index, _SQL);
 127         return;
 128     }
 129 }
 130
 131 - (void)bindDouble:(double)value atIndex:(NSUInteger)index {
 132     if (!_reset) {
 133         secerror("sfsqlite: Statement is not reset: \"%@\"", _SQL);
 134         return;
 135     }
 136
 137     if (sqlite3_bind_double(_handle, (int)index+1, value)) {
 138         secerror("sfsqlite: Error binding double at %ld: \"%@\"", (unsigned long)index, _SQL);
 139         return;
 140     }
 141 }
 142
 143 - (void)bindBlob:(NSData *)value atIndex:(NSUInteger)index {
 144     if (!_reset) {
 145         secerror("sfsqlite: Statement is not reset: \"%@\"", _SQL);
 146         return;
 147     }
 148
 149     if (value) {
 150         NS_VALID_UNTIL_END_OF_SCOPE NSData *arcSafeValue = value;
 151         if (sqlite3_bind_blob(_handle, (int)index+1, [arcSafeValue bytes], (int)[arcSafeValue length], NULL)) {
 152             secerror("sfsqlite: Error binding blob at %ld: \"%@\"", (unsigned long)index, _SQL);
 153             return;
 154         }
 155     } else {
 156         [self bindNullAtIndex:index];
 157     }
 158 }
 159
 160 - (void)bindText:(NSString *)value atIndex:(NSUInteger)index {
 161     if (!_reset) {
 162         secerror("sfsqlite: Statement is not reset: \"%@\"", _SQL);
 163         return;
 164     }
 165
 166     if (value) {
 167         NS_VALID_UNTIL_END_OF_SCOPE NSString *arcSafeValue = value;
 168         if (sqlite3_bind_text(_handle, (int)index+1, [arcSafeValue UTF8String], -1, NULL)) {
 169             secerror("sfsqlite: Error binding text at %ld: \"%@\"", (unsigned long)index, _SQL);
 170             return;
 171         }
 172     } else {
 173         [self bindNullAtIndex:index];
 174     }
 175 }
 176
 177 - (void)bindNullAtIndex:(NSUInteger)index {
 178     int rc = sqlite3_bind_null(_handle, (int)index+1);
 179     if ((rc & 0x00FF) != SQLITE_OK) {
 180         secerror("sfsqlite: sqlite3_bind_null error");
 181         return;
 182     }
 183 }
 184
 185 - (id)retainedTemporaryBoundObject:(id)object
 186 {
 187     if (!_temporaryBoundObjects) {
 188         _temporaryBoundObjects = [NSMutableArray new];
 189     }
 190     [_temporaryBoundObjects addObject:object];
 191     return object;
 192 }
 193
 194 - (void)bindValue:(id)value atIndex:(NSUInteger)index {
 195     if ([value isKindOfClass:[NSNumber class]]) {
 196         SFObjCType *type = [SFObjCType typeForValue:value];
 197         if (type.isIntegerNumber) {
 198             if (type.size <= 4) {
 199                 [self bindInt:[value intValue] atIndex:index];
 200             } else {
 201                 [self bindInt64:[value longLongValue] atIndex:index];
 202             }
 203         } else {
 204             NSAssert(type.isFloatingPointNumber, @"Expected number type to be either integer or floating point");
 205             NSAssert(type.code == SFObjCTypeDouble || type.code == SFObjCTypeFloat, @"Unexpected floating point number type: %@", type);
 206             [self bindDouble:[value doubleValue] atIndex:index];
 207         }
 208     } else if ([value isKindOfClass:[NSData class]]) {
 209         [self bindBlob:value atIndex:index];
 210     } else if ([value isKindOfClass:[NSUUID class]]) {
 211         uuid_t uuid;
 212         [(NSUUID *)value getUUIDBytes:uuid];
 213         [self bindBlob:[self retainedTemporaryBoundObject:[NSData dataWithBytes:uuid length:sizeof(uuid_t)]] atIndex:index];
 214     } else if ([value isKindOfClass:[NSString class]]) {
 215         [self bindText:value atIndex:index];
 216     } else if ([value isKindOfClass:[NSNull class]]) {
 217         [self bindNullAtIndex:index];
 218     } else if ([value isKindOfClass:[NSDate class]]) {
 219         [self bindDouble:[(NSDate *)value timeIntervalSinceReferenceDate] atIndex:index];
 220     } else if ([value isKindOfClass:[NSError class]]) {
 221         [self bindBlob:[self retainedTemporaryBoundObject:[NSKeyedArchiver archivedDataWithRootObject:value requiringSecureCoding:YES error:nil]] atIndex:index];
 222     } else if ([value isKindOfClass:[NSURL class]]) {
 223         [self bindText:[self retainedTemporaryBoundObject:[value absoluteString]] atIndex:index];
 224     } else {
 225         secerror("sfsqlite: Can't bind object of type %@", [value class]);
 226         return;
 227     }
 228 }
 229
 230 - (void)bindValues:(NSArray *)values {
 231     for (NSUInteger i = 0; i < values.count; i++) {
 232         [self bindValue:values[i] atIndex:i];
 233     }
 234 }
 235
 236 - (NSUInteger)columnCount {
 237     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 238
 239     return sqlite3_column_count(_handle);
 240 }
 241
 242 - (int)columnTypeAtIndex:(NSUInteger)index {
 243     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 244
 245     return sqlite3_column_type(_handle, (int)index);
 246 }
 247
 248 - (NSString *)columnNameAtIndex:(NSUInteger)index {
 249     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 250
 251     return @(sqlite3_column_name(_handle, (int)index));
 252 }
 253
 254 - (SInt32)intAtIndex:(NSUInteger)index {
 255     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 256
 257     return sqlite3_column_int(_handle, (int)index);
 258 }
 259
 260 - (SInt64)int64AtIndex:(NSUInteger)index {
 261     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 262
 263     return sqlite3_column_int64(_handle, (int)index);
 264 }
 265
 266 - (double)doubleAtIndex:(NSUInteger)index {
 267     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 268
 269     return sqlite3_column_double(_handle, (int)index);
 270 }
 271
 272 - (NSData *)blobAtIndex:(NSUInteger)index {
 273     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 274
 275     const void *bytes = sqlite3_column_blob(_handle, (int)index);
 276     if (bytes) {
 277         int length = sqlite3_column_bytes(_handle, (int)index);
 278         return [NSData dataWithBytes:bytes length:length];
 279     } else {
 280         return nil;
 281     }
 282 }
 283
 284 - (NSString *)textAtIndex:(NSUInteger)index {
 285     NSAssert(!_reset, @"Statement is reset: \"%@\"", _SQL);
 286
 287     const char *text = (const char *)sqlite3_column_text(_handle, (int)index);
 288     if (text) {
 289         return @(text);
 290     } else {
 291         return nil;
 292     }
 293 }
 294
 295 - (id)objectAtIndex:(NSUInteger)index {
 296     int type = [self columnTypeAtIndex:index];
 297     switch (type) {
 298         case SQLITE_INTEGER:
 299             return @([self int64AtIndex:index]);
 300
 301         case SQLITE_FLOAT:
 302             return @([self doubleAtIndex:index]);
 303
 304         case SQLITE_TEXT:
 305             return [self textAtIndex:index];
 306
 307         case SQLITE_BLOB:
 308             return [self blobAtIndex:index];
 309
 310         case SQLITE_NULL:
 311             return nil;
 312
 313         default:
 314             secerror("sfsqlite: Unexpected column type: %d", type);
 315             return nil;
 316     }
 317 }
 318
 319 - (NSArray *)allObjects {
 320     NSUInteger columnCount = [self columnCount];
 321     NSMutableArray *objects = [NSMutableArray arrayWithCapacity:columnCount];
 322     for (NSUInteger i = 0; i < columnCount; i++) {
 323         objects[i] = [self objectAtIndex:i] ?: [NSNull null];
 324     }
 325     return objects;
 326 }
 327
 328 - (NSDictionary *)allObjectsByColumnName {
 329     NSUInteger columnCount = [self columnCount];
 330     NSMutableDictionary *objectsByColumnName = [NSMutableDictionary dictionaryWithCapacity:columnCount];
 331     for (NSUInteger i = 0; i < columnCount; i++) {
 332         NSString *columnName = [self columnNameAtIndex:i];
 333         id object = [self objectAtIndex:i];
 334         if (object) {
 335             objectsByColumnName[columnName] = object;
 336         }
 337     }
 338     return objectsByColumnName;
 339 }
 340
 341 @end
 342
 343 #endif