151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
#include "mysql_duce_ext.h"
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/* MySQL::Client */
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static VALUE rb_mysql_client_new(VALUE klass) {
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MYSQL * client;
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VALUE obj;
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obj = Data_Make_Struct(klass, MYSQL, NULL, rb_mysql_client_free, client);
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if (!mysql_init(client)) {
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// TODO: warning - not enough memory?
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rb_raise(rb_eStandardError, "%s", mysql_error(client));
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return Qnil;
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}
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if (mysql_options(client, MYSQL_SET_CHARSET_NAME, "utf8") != 0) {
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// TODO: warning - unable to set charset
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rb_warn("%s", mysql_error(client));
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}
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// HACK
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if (!mysql_real_connect(client, "localhost", "root", NULL, NULL, 0, NULL, 0)) {
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// unable to connect
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rb_raise(rb_eStandardError, "%s", mysql_error(client));
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return Qnil;
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}
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// HACK
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rb_obj_call_init(obj, 0, NULL);
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return obj;
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}
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static VALUE rb_mysql_client_init(VALUE self) {
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return self;
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}
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void rb_mysql_client_free(void * client) {
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MYSQL * c = client;
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if (c) {
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mysql_close(client);
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}
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}
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static VALUE rb_mysql_client_query(VALUE self, VALUE sql) {
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MYSQL * client;
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MYSQL_RES * result = NULL;
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int query;
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Check_Type(sql, T_STRING);
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GetMySQLClient(self, client);
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query = mysql_real_query(client, RSTRING_PTR(sql), RSTRING_LEN(sql));
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if (query != 0) {
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// lookup error code and msg, raise exception
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}
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result = mysql_store_result(client);
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if (result == NULL) {
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// lookup error code and msg, raise exception
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}
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return rb_mysql_result_to_obj(result);
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}
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/* MySQL::Result */
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static VALUE rb_mysql_result_to_obj(MYSQL_RES * r) {
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VALUE obj;
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obj = Data_Wrap_Struct(cMySQLResult, 0, rb_mysql_result_free, r);
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rb_obj_call_init(obj, 0, NULL);
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return obj;
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}
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void rb_mysql_result_free(void * result) {
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MYSQL_RES * r = result;
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if (r) {
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mysql_free_result(r);
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}
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}
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static VALUE rb_mysql_result_fetch_row(VALUE self) {
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VALUE rowHash;
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MYSQL_RES * result;
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MYSQL_ROW row;
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MYSQL_FIELD * fields;
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unsigned int numFields;
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unsigned long * fieldLengths;
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unsigned int i;
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GetMySQLResult(self, result);
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row = mysql_fetch_row(result);
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if (row == NULL) {
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return Qnil;
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}
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numFields = mysql_num_fields(result);
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fieldLengths = mysql_fetch_lengths(result);
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fields = mysql_fetch_fields(result);
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rowHash = rb_hash_new();
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// TODO: yield to a passed block
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for (i = 0; i < numFields; i++) {
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VALUE key = rb_str_new(fields[i].name, fields[i].name_length);
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if (row[i]) {
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rb_hash_aset(rowHash, key, Qnil);
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} else {
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rb_hash_aset(rowHash, key, Qnil);
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}
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}
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return rowHash;
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}
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static VALUE rb_mysql_result_fetch_rows(VALUE self) {
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VALUE dataset;
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MYSQL_RES * result;
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unsigned long numRows, i;
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GetMySQLResult(self, result);
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numRows = mysql_num_rows(result);
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if (numRows == 0) {
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return Qnil;
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}
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dataset = rb_ary_new2(numRows);
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for (i = 0; i < numRows; i++) {
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VALUE row = rb_mysql_result_fetch_row(self);
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if (row == Qnil) {
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return Qnil;
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}
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rb_ary_store(dataset, i, row);
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}
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return dataset;
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}
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/* Ruby Extension initializer */
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void Init_mysql_duce_ext() {
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mMySQL = rb_define_module("MySQL");
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cMySQLClient = rb_define_class_under(mMySQL, "Client", rb_cObject);
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rb_define_singleton_method(cMySQLClient, "new", rb_mysql_client_new, 0);
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rb_define_method(cMySQLClient, "initialize", rb_mysql_client_init, 0);
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rb_define_method(cMySQLClient, "query", rb_mysql_client_query, 1);
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cMySQLResult = rb_define_class_under(mMySQL, "Result", rb_cObject);
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rb_define_method(cMySQLResult, "fetch_row", rb_mysql_result_fetch_row, 0);
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rb_define_method(cMySQLResult, "fetch_rows", rb_mysql_result_fetch_rows, 0);
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#ifdef HAVE_RUBY_ENCODING_H
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utf8Encoding = rb_enc_find_index("UTF-8");
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#endif
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} |