Build ChatListUI

2025-12-22 14:20:20 +00:00 · 2020-02-22 15:38:54 +04:00
parent f57d6b6168
commit 5380b12805
1510 changed files with 643 additions and 309 deletions
--- a/submodules/LegacyComponents/Sources/PSLMDBKeyValueCursor.m
+++ b/submodules/LegacyComponents/Sources/PSLMDBKeyValueCursor.m
@@ -0,0 +1,139 @@
+#import "PSLMDBKeyValueCursor.h"
+
+#import "LegacyComponentsInternal.h"
+
+#import "PSLMDBTable.h"
+
+@interface PSLMDBKeyValueCursor ()
+{
+    MDB_dbi _dbi;
+    MDB_txn *_txn;
+    MDB_cursor *_cursor;
+}
+
+@end
+
+@implementation PSLMDBKeyValueCursor
+
+- (instancetype)initWithTable:(PSLMDBTable *)table transaction:(MDB_txn *)transaction cursor:(MDB_cursor *)cursor
+{
+    self = [super init];
+    if (self != nil)
+    {
+        _dbi = table.dbi;
+        _txn = transaction;
+        _cursor = cursor;
+    }
+    return self;
+}
+
+- (bool)positionAt:(uint8_t const **)key keyLength:(NSUInteger *)keyLength value:(uint8_t const **)value valueLength:(NSUInteger *)valueLength directionIfNotFound:(PSKeyValueCursorDirection)directionIfNotFound
+{
+    if (key == NULL || keyLength == 0)
+        return false;
+    
+    MDB_val mdbKey = {.mv_data = (void *)*key, .mv_size = *keyLength};
+    MDB_val mdbData = {.mv_data = NULL, .mv_size = 0};
+    
+    int rc = 0;
+    rc = mdb_cursor_get(_cursor, &mdbKey, &mdbData, directionIfNotFound == PSKeyValueCursorDirectionForward ? MDB_SET_RANGE : MDB_SET_KEY);
+    
+    if (rc == MDB_SUCCESS)
+    {
+        *key = mdbKey.mv_data;
+        *keyLength = mdbKey.mv_size;
+        
+        if (value != NULL)
+            *value = mdbData.mv_data;
+        
+        if (valueLength != NULL)
+            *valueLength = mdbData.mv_size;
+        
+        return true;
+    }
+    else if (rc == MDB_NOTFOUND)
+    {
+        if (directionIfNotFound == PSKeyValueCursorDirectionBack)
+            return [self previous:key keyLength:keyLength value:value valueLength:valueLength];
+    }
+    else
+    {
+        TGLegacyLog(@"[PSLMDBKeyValueReader mdb_cursor_get error %d]", rc);
+        
+        return false;
+    }
+    
+    return false;
+}
+
+- (bool)previous:(uint8_t const **)key keyLength:(NSUInteger *)keyLength value:(uint8_t const **)value valueLength:(NSUInteger *)valueLength
+{
+    if (key == NULL || keyLength == 0)
+        return false;
+    
+    MDB_val mdbKey = {.mv_data = NULL, .mv_size = 0};
+    MDB_val mdbData = {.mv_data = NULL, .mv_size = 0};
+    
+    int rc = 0;
+    rc = mdb_cursor_get(_cursor, &mdbKey, &mdbData, MDB_PREV);
+    
+    if (rc == MDB_SUCCESS)
+    {
+        *key = mdbKey.mv_data;
+        *keyLength = mdbKey.mv_size;
+        
+        if (value != NULL)
+            *value = mdbData.mv_data;
+        
+        if (valueLength != NULL)
+            *valueLength = mdbData.mv_size;
+        
+        return true;
+    }
+    else
+    {
+        if (rc != MDB_NOTFOUND)
+            TGLegacyLog(@"[PSLMDBKeyValueReader mdb_cursor_get error %d]", rc);
+        
+        return false;
+    }
+    
+    return false;
+}
+
+- (bool)next:(uint8_t const **)key keyLength:(NSUInteger *)keyLength value:(uint8_t const **)value valueLength:(NSUInteger *)valueLength
+{
+    if (key == NULL || keyLength == 0)
+        return false;
+    
+    MDB_val mdbKey = {.mv_data = NULL, .mv_size = 0};
+    MDB_val mdbData = {.mv_data = NULL, .mv_size = 0};
+    
+    int rc = 0;
+    rc = mdb_cursor_get(_cursor, &mdbKey, &mdbData, MDB_NEXT);
+    
+    if (rc == MDB_SUCCESS)
+    {
+        *key = mdbKey.mv_data;
+        *keyLength = mdbKey.mv_size;
+        
+        if (value != NULL)
+            *value = mdbData.mv_data;
+        
+        if (valueLength != NULL)
+            *valueLength = mdbData.mv_size;
+        
+        return true;
+    }
+    else
+    {
+        if (rc != MDB_NOTFOUND)
+            TGLegacyLog(@"[PSLMDBKeyValueReader mdb_cursor_get error %d]", rc);
+        
+        return false;
+    }
+    
+    return false;
+}
+
+@end