mysql2/ext/mysql2/result.c
2010-08-06 00:01:09 -07:00

427 lines
14 KiB
C

#include <mysql2_ext.h>
#ifdef HAVE_RUBY_ENCODING_H
rb_encoding *binaryEncoding;
#endif
VALUE cMysql2Result;
VALUE cBigDecimal, cDate, cDateTime;
extern VALUE mMysql2, cMysql2Client, cMysql2Error;
static VALUE intern_encoding_from_charset;
static ID intern_new, intern_utc, intern_local, intern_encoding_from_charset_code,
intern_localtime;
static ID sym_symbolize_keys, sym_as, sym_array, sym_database_timezone, sym_application_timezone,
sym_local, sym_utc, sym_cast_booleans;
static ID intern_merge;
static void rb_mysql_result_mark(void * wrapper) {
mysql2_result_wrapper * w = wrapper;
if (w) {
rb_gc_mark(w->fields);
rb_gc_mark(w->rows);
}
}
/* this may be called manually or during GC */
static void rb_mysql_result_free_result(mysql2_result_wrapper * wrapper) {
if (wrapper && wrapper->resultFreed != 1) {
mysql_free_result(wrapper->result);
wrapper->resultFreed = 1;
}
}
/* this is called during GC */
static void rb_mysql_result_free(void * wrapper) {
mysql2_result_wrapper * w = wrapper;
/* FIXME: this may call flush_use_result, which can hit the socket */
rb_mysql_result_free_result(w);
xfree(wrapper);
}
/*
* for small results, this won't hit the network, but there's no
* reliable way for us to tell this so we'll always release the GVL
* to be safe
*/
static VALUE nogvl_fetch_row(void *ptr) {
MYSQL_RES *result = ptr;
return (VALUE)mysql_fetch_row(result);
}
static VALUE rb_mysql_result_fetch_field(VALUE self, unsigned int idx, short int symbolize_keys) {
mysql2_result_wrapper * wrapper;
GetMysql2Result(self, wrapper);
if (wrapper->fields == Qnil) {
wrapper->numberOfFields = mysql_num_fields(wrapper->result);
wrapper->fields = rb_ary_new2(wrapper->numberOfFields);
}
VALUE rb_field = rb_ary_entry(wrapper->fields, idx);
if (rb_field == Qnil) {
MYSQL_FIELD *field = NULL;
#ifdef HAVE_RUBY_ENCODING_H
rb_encoding *default_internal_enc = rb_default_internal_encoding();
rb_encoding *conn_enc = rb_to_encoding(rb_iv_get(self, "@encoding"));
#endif
field = mysql_fetch_field_direct(wrapper->result, idx);
if (symbolize_keys) {
char buf[field->name_length+1];
memcpy(buf, field->name, field->name_length);
buf[field->name_length] = 0;
rb_field = ID2SYM(rb_intern(buf));
} else {
rb_field = rb_str_new(field->name, field->name_length);
#ifdef HAVE_RUBY_ENCODING_H
rb_enc_associate(rb_field, conn_enc);
if (default_internal_enc) {
rb_field = rb_str_export_to_enc(rb_field, default_internal_enc);
}
#endif
}
rb_ary_store(wrapper->fields, idx, rb_field);
}
return rb_field;
}
static VALUE rb_mysql_result_fetch_row(VALUE self, ID db_timezone, ID app_timezone, int symbolizeKeys, int asArray, int castBool) {
VALUE rowVal;
mysql2_result_wrapper * wrapper;
MYSQL_ROW row;
MYSQL_FIELD * fields = NULL;
unsigned int i = 0;
unsigned long * fieldLengths;
void * ptr;
#ifdef HAVE_RUBY_ENCODING_H
rb_encoding *default_internal_enc = rb_default_internal_encoding();
rb_encoding *conn_enc = rb_to_encoding(rb_iv_get(self, "@encoding"));
#endif
GetMysql2Result(self, wrapper);
ptr = wrapper->result;
row = (MYSQL_ROW)rb_thread_blocking_region(nogvl_fetch_row, ptr, RUBY_UBF_IO, 0);
if (row == NULL) {
return Qnil;
}
if (asArray) {
rowVal = rb_ary_new2(wrapper->numberOfFields);
} else {
rowVal = rb_hash_new();
}
fields = mysql_fetch_fields(wrapper->result);
fieldLengths = mysql_fetch_lengths(wrapper->result);
if (wrapper->fields == Qnil) {
wrapper->numberOfFields = mysql_num_fields(wrapper->result);
wrapper->fields = rb_ary_new2(wrapper->numberOfFields);
}
for (i = 0; i < wrapper->numberOfFields; i++) {
VALUE field = rb_mysql_result_fetch_field(self, i, symbolizeKeys);
if (row[i]) {
VALUE val;
switch(fields[i].type) {
case MYSQL_TYPE_NULL: // NULL-type field
val = Qnil;
break;
case MYSQL_TYPE_BIT: // BIT field (MySQL 5.0.3 and up)
val = rb_str_new(row[i], fieldLengths[i]);
break;
case MYSQL_TYPE_TINY: // TINYINT field
if (castBool && fields[i].length == 1) {
val = *row[i] == '1' ? Qtrue : Qfalse;
break;
}
case MYSQL_TYPE_SHORT: // SMALLINT field
case MYSQL_TYPE_LONG: // INTEGER field
case MYSQL_TYPE_INT24: // MEDIUMINT field
case MYSQL_TYPE_LONGLONG: // BIGINT field
case MYSQL_TYPE_YEAR: // YEAR field
val = rb_cstr2inum(row[i], 10);
break;
case MYSQL_TYPE_DECIMAL: // DECIMAL or NUMERIC field
case MYSQL_TYPE_NEWDECIMAL: // Precision math DECIMAL or NUMERIC field (MySQL 5.0.3 and up)
val = rb_funcall(cBigDecimal, intern_new, 1, rb_str_new(row[i], fieldLengths[i]));
break;
case MYSQL_TYPE_FLOAT: // FLOAT field
case MYSQL_TYPE_DOUBLE: // DOUBLE or REAL field
val = rb_float_new(strtod(row[i], NULL));
break;
case MYSQL_TYPE_TIME: { // TIME field
int hour, min, sec, tokens;
tokens = sscanf(row[i], "%2d:%2d:%2d", &hour, &min, &sec);
val = rb_funcall(rb_cTime, db_timezone, 6, INT2NUM(2000), INT2NUM(1), INT2NUM(1), INT2NUM(hour), INT2NUM(min), INT2NUM(sec));
if (!NIL_P(app_timezone)) {
if (app_timezone == intern_local) {
val = rb_funcall(val, intern_localtime, 0);
} else { // utc
val = rb_funcall(val, intern_utc, 0);
}
}
break;
}
case MYSQL_TYPE_TIMESTAMP: // TIMESTAMP field
case MYSQL_TYPE_DATETIME: { // DATETIME field
int year, month, day, hour, min, sec, tokens;
tokens = sscanf(row[i], "%4d-%2d-%2d %2d:%2d:%2d", &year, &month, &day, &hour, &min, &sec);
if (year+month+day+hour+min+sec == 0) {
val = Qnil;
} else {
if (month < 1 || day < 1) {
rb_raise(cMysql2Error, "Invalid date: %s", row[i]);
val = Qnil;
} else {
val = rb_funcall(rb_cTime, db_timezone, 6, INT2NUM(year), INT2NUM(month), INT2NUM(day), INT2NUM(hour), INT2NUM(min), INT2NUM(sec));
if (!NIL_P(app_timezone)) {
if (app_timezone == intern_local) {
val = rb_funcall(val, intern_localtime, 0);
} else { // utc
val = rb_funcall(val, intern_utc, 0);
}
}
}
}
break;
}
case MYSQL_TYPE_DATE: // DATE field
case MYSQL_TYPE_NEWDATE: { // Newer const used > 5.0
int year, month, day, tokens;
tokens = sscanf(row[i], "%4d-%2d-%2d", &year, &month, &day);
if (year+month+day == 0) {
val = Qnil;
} else {
if (month < 1 || day < 1) {
rb_raise(cMysql2Error, "Invalid date: %s", row[i]);
val = Qnil;
} else {
val = rb_funcall(cDate, intern_new, 3, INT2NUM(year), INT2NUM(month), INT2NUM(day));
}
}
break;
}
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_STRING: // CHAR or BINARY field
case MYSQL_TYPE_SET: // SET field
case MYSQL_TYPE_ENUM: // ENUM field
case MYSQL_TYPE_GEOMETRY: // Spatial fielda
default:
val = rb_str_new(row[i], fieldLengths[i]);
#ifdef HAVE_RUBY_ENCODING_H
// if binary flag is set, respect it's wishes
if (fields[i].flags & BINARY_FLAG) {
rb_enc_associate(val, binaryEncoding);
} else {
// lookup the encoding configured on this field
VALUE new_encoding = rb_funcall(cMysql2Client, intern_encoding_from_charset_code, 1, INT2NUM(fields[i].charsetnr));
if (new_encoding != Qnil) {
// use the field encoding we were able to match
rb_encoding *enc = rb_to_encoding(new_encoding);
rb_enc_associate(val, enc);
} else {
// otherwise fall-back to the connection's encoding
rb_enc_associate(val, conn_enc);
}
if (default_internal_enc) {
val = rb_str_export_to_enc(val, default_internal_enc);
}
}
#endif
break;
}
if (asArray) {
rb_ary_push(rowVal, val);
} else {
rb_hash_aset(rowVal, field, val);
}
} else {
if (asArray) {
rb_ary_push(rowVal, Qnil);
} else {
rb_hash_aset(rowVal, field, Qnil);
}
}
}
return rowVal;
}
static VALUE rb_mysql_result_fetch_fields(VALUE self) {
mysql2_result_wrapper * wrapper;
unsigned int i = 0;
short int symbolizeKeys = 0;
VALUE defaults;
GetMysql2Result(self, wrapper);
defaults = rb_iv_get(self, "@query_options");
if (rb_hash_aref(defaults, sym_symbolize_keys) == Qtrue) {
symbolizeKeys = 1;
}
if (wrapper->fields == Qnil) {
wrapper->numberOfFields = mysql_num_fields(wrapper->result);
wrapper->fields = rb_ary_new2(wrapper->numberOfFields);
}
if (RARRAY_LEN(wrapper->fields) != wrapper->numberOfFields) {
for (i=0; i<wrapper->numberOfFields; i++) {
rb_mysql_result_fetch_field(self, i, symbolizeKeys);
}
}
return wrapper->fields;
}
static VALUE rb_mysql_result_each(int argc, VALUE * argv, VALUE self) {
VALUE defaults, opts, block;
ID db_timezone, app_timezone, dbTz, appTz;
mysql2_result_wrapper * wrapper;
unsigned long i;
int symbolizeKeys = 0, asArray = 0, castBool = 0;
GetMysql2Result(self, wrapper);
defaults = rb_iv_get(self, "@query_options");
if (rb_scan_args(argc, argv, "01&", &opts, &block) == 1) {
opts = rb_funcall(defaults, intern_merge, 1, opts);
} else {
opts = defaults;
}
if (rb_hash_aref(opts, sym_symbolize_keys) == Qtrue) {
symbolizeKeys = 1;
}
if (rb_hash_aref(opts, sym_as) == sym_array) {
asArray = 1;
}
if (rb_hash_aref(opts, sym_cast_booleans) == Qtrue) {
castBool = 1;
}
dbTz = rb_hash_aref(opts, sym_database_timezone);
if (dbTz == sym_local) {
db_timezone = intern_local;
} else if (dbTz == sym_utc) {
db_timezone = intern_utc;
} else {
if (!NIL_P(dbTz)) {
rb_warn(":database_timezone option must be :utc or :local - defaulting to :local");
}
db_timezone = intern_local;
}
appTz = rb_hash_aref(opts, sym_application_timezone);
if (appTz == sym_local) {
app_timezone = intern_local;
} else if (appTz == sym_utc) {
app_timezone = intern_utc;
} else {
app_timezone = intern_local;
}
if (wrapper->lastRowProcessed == 0) {
wrapper->numberOfRows = mysql_num_rows(wrapper->result);
if (wrapper->numberOfRows == 0) {
wrapper->rows = rb_ary_new();
return wrapper->rows;
}
wrapper->rows = rb_ary_new2(wrapper->numberOfRows);
}
if (wrapper->lastRowProcessed == wrapper->numberOfRows) {
// we've already read the entire dataset from the C result into our
// internal array. Lets hand that over to the user since it's ready to go
for (i = 0; i < wrapper->numberOfRows; i++) {
rb_yield(rb_ary_entry(wrapper->rows, i));
}
} else {
unsigned long rowsProcessed = 0;
rowsProcessed = RARRAY_LEN(wrapper->rows);
for (i = 0; i < wrapper->numberOfRows; i++) {
VALUE row;
if (i < rowsProcessed) {
row = rb_ary_entry(wrapper->rows, i);
} else {
row = rb_mysql_result_fetch_row(self, db_timezone, app_timezone, symbolizeKeys, asArray, castBool);
rb_ary_store(wrapper->rows, i, row);
wrapper->lastRowProcessed++;
}
if (row == Qnil) {
// we don't need the mysql C dataset around anymore, peace it
rb_mysql_result_free_result(wrapper);
return Qnil;
}
if (block != Qnil) {
rb_yield(row);
}
}
if (wrapper->lastRowProcessed == wrapper->numberOfRows) {
// we don't need the mysql C dataset around anymore, peace it
rb_mysql_result_free_result(wrapper);
}
}
return wrapper->rows;
}
/* Mysql2::Result */
VALUE rb_mysql_result_to_obj(MYSQL_RES * r) {
VALUE obj;
mysql2_result_wrapper * wrapper;
obj = Data_Make_Struct(cMysql2Result, mysql2_result_wrapper, rb_mysql_result_mark, rb_mysql_result_free, wrapper);
wrapper->numberOfFields = 0;
wrapper->numberOfRows = 0;
wrapper->lastRowProcessed = 0;
wrapper->resultFreed = 0;
wrapper->result = r;
wrapper->fields = Qnil;
wrapper->rows = Qnil;
rb_obj_call_init(obj, 0, NULL);
return obj;
}
void init_mysql2_result() {
cBigDecimal = rb_const_get(rb_cObject, rb_intern("BigDecimal"));
cDate = rb_const_get(rb_cObject, rb_intern("Date"));
cDateTime = rb_const_get(rb_cObject, rb_intern("DateTime"));
cMysql2Result = rb_define_class_under(mMysql2, "Result", rb_cObject);
rb_define_method(cMysql2Result, "each", rb_mysql_result_each, -1);
rb_define_method(cMysql2Result, "fields", rb_mysql_result_fetch_fields, 0);
intern_encoding_from_charset = rb_intern("encoding_from_charset");
intern_encoding_from_charset_code = rb_intern("encoding_from_charset_code");
intern_new = rb_intern("new");
intern_utc = rb_intern("utc");
intern_local = rb_intern("local");
intern_merge = rb_intern("merge");
intern_localtime = rb_intern("localtime");
sym_symbolize_keys = ID2SYM(rb_intern("symbolize_keys"));
sym_as = ID2SYM(rb_intern("as"));
sym_array = ID2SYM(rb_intern("array"));
sym_local = ID2SYM(rb_intern("local"));
sym_utc = ID2SYM(rb_intern("utc"));
sym_cast_booleans = ID2SYM(rb_intern("cast_booleans"));
sym_database_timezone = ID2SYM(rb_intern("database_timezone"));
sym_application_timezone = ID2SYM(rb_intern("application_timezone"));
#ifdef HAVE_RUBY_ENCODING_H
binaryEncoding = rb_enc_find("binary");
#endif
}