Class: UnQLite::Database

Inherits:
Object
  • Object
show all
Defined in:
ext/unqlite/unqlite_database.c

Instance Method Summary collapse

Constructor Details

#initialize(rb_string) ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 22

static VALUE initialize(VALUE self, VALUE rb_string)
{
  void *c_string;
  int rc;
  unqliteRubyPtr ctx;

  // Ensure the given argument is a ruby string
  Check_Type(rb_string, T_STRING);

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Transform Ruby string into C string
  c_string = calloc(RSTRING_LEN(rb_string), sizeof(char));
  memcpy(c_string, StringValuePtr(rb_string), RSTRING_LEN(rb_string));

  // Open database
  // TODO: Accept others open mode (read-only + mmap, etc. Check http://unqlite.org/c_api/unqlite_open.html)
  rc = unqlite_open(&ctx->pDb, c_string, UNQLITE_OPEN_CREATE);

  // Check if any exception should be raised
  CHECK(ctx->pDb, rc);

  return self;
}

Instance Method Details

#begin_transaction ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 130

static VALUE unqlite_database_begin_transaction(VALUE self)
{
  int rc;
  unqliteRubyPtr ctx;

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Begin write-transaction manually
  rc = unqlite_begin(ctx->pDb);

  // Check for errors
  CHECK(ctx->pDb, rc);

  return Qtrue;
}

#close ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 48

static VALUE unqlite_database_close(VALUE self)
{
  int rc;
  unqliteRubyPtr ctx;

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Close database
  rc = unqlite_close(ctx->pDb);

  // Check for errors
  CHECK(ctx->pDb, rc);

  return Qtrue;
}

#commit ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 147

static VALUE unqlite_database_commit(VALUE self)
{
  int rc;
  unqliteRubyPtr ctx;

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Commit transaction
  rc = unqlite_commit(ctx->pDb);

  // Check for errors
  CHECK(ctx->pDb, rc);

  return Qtrue;
}

#fetch(collection_name) ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 96

static VALUE unqlite_database_fetch(VALUE self, VALUE collection_name)
{
  void *c_collection_name;
  void *fetched_data;
  unqlite_int64 n_bytes;
  int rc;
  unqliteRubyPtr ctx;

  // Ensure the given argument is a ruby string
  Check_Type(collection_name, T_STRING);

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Transform Ruby string into C string
  c_collection_name = calloc(RSTRING_LEN(collection_name), sizeof(char));
  memcpy(c_collection_name, StringValuePtr(collection_name), RSTRING_LEN(collection_name));

  // Extract the data size, check for errors and return if any
  rc = unqlite_kv_fetch(ctx->pDb, c_collection_name, -1, NULL, &n_bytes);
  CHECK(ctx->pDb, rc);
  if( rc != UNQLITE_OK ) { return Qnil; }

  // Data is empty
  fetched_data = (char *)malloc(n_bytes);
  if( fetched_data == NULL ) { return rb_str_new2(""); }

  // Now, fetch the data
  rc = unqlite_kv_fetch(ctx->pDb, c_collection_name, -1, fetched_data, &n_bytes);
  CHECK(ctx->pDb, rc);

  return rb_str_new2((char *)fetched_data);
}

#rollback ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 164

static VALUE unqlite_database_rollback(VALUE self)
{
  int rc;
  unqliteRubyPtr ctx;

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Rollback transaction
  rc = unqlite_rollback(ctx->pDb);

  // Check for errors
  CHECK(ctx->pDb, rc);

  return Qtrue;
}

#store(key, value) ⇒ Object 



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# File 'ext/unqlite/unqlite_database.c', line 66

static VALUE unqlite_database_store(VALUE self, VALUE key, VALUE value)
{
  void *c_key;
  void *c_value;
  int rc;
  unqliteRubyPtr ctx;

  // Ensure the given argument is a ruby string
  Check_Type(key, T_STRING);
  Check_Type(value, T_STRING);

  // Get class context
  Data_Get_Struct(self, unqliteRuby, ctx);

  // Transform Ruby string into C string
  c_key = calloc(RSTRING_LEN(key), sizeof(char));
  memcpy(c_key, StringValuePtr(key), RSTRING_LEN(key));

  c_value = calloc(RSTRING_LEN(value), sizeof(char));
  memcpy(c_value, StringValuePtr(value), RSTRING_LEN(value));

  // Store it
  rc = unqlite_kv_store(ctx->pDb, c_key, -1, c_value, sizeof(c_value));

  // Check for errors
  CHECK(ctx->pDb, rc);

  return Qtrue;
}