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// Copyright (C) 2019 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
// These wrappers are necessary because SQLITE_TRANSIENT
// is a pointer constant, and cgo doesn't translate them correctly.
static inline void my_result_text(sqlite3_context *ctx, char *p, int np) {
sqlite3_result_text(ctx, p, np, SQLITE_TRANSIENT);
}
static inline void my_result_blob(sqlite3_context *ctx, void *p, int np) {
sqlite3_result_blob(ctx, p, np, SQLITE_TRANSIENT);
}
*/
import "C"
import (
"math"
"reflect"
"unsafe"
)
const i64 = unsafe.Sizeof(int(0)) > 4
// SQLiteContext behave sqlite3_context
type SQLiteContext C.sqlite3_context
// ResultBool sets the result of an SQL function.
func (c *SQLiteContext) ResultBool(b bool) {
if b {
c.ResultInt(1)
} else {
c.ResultInt(0)
}
}
// ResultBlob sets the result of an SQL function.
// See: sqlite3_result_blob, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultBlob(b []byte) {
if i64 && len(b) > math.MaxInt32 {
C.sqlite3_result_error_toobig((*C.sqlite3_context)(c))
return
}
var p *byte
if len(b) > 0 {
p = &b[0]
}
C.my_result_blob((*C.sqlite3_context)(c), unsafe.Pointer(p), C.int(len(b)))
}
// ResultDouble sets the result of an SQL function.
// See: sqlite3_result_double, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultDouble(d float64) {
C.sqlite3_result_double((*C.sqlite3_context)(c), C.double(d))
}
// ResultInt sets the result of an SQL function.
// See: sqlite3_result_int, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultInt(i int) {
if i64 && (i > math.MaxInt32 || i < math.MinInt32) {
C.sqlite3_result_int64((*C.sqlite3_context)(c), C.sqlite3_int64(i))
} else {
C.sqlite3_result_int((*C.sqlite3_context)(c), C.int(i))
}
}
// ResultInt64 sets the result of an SQL function.
// See: sqlite3_result_int64, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultInt64(i int64) {
C.sqlite3_result_int64((*C.sqlite3_context)(c), C.sqlite3_int64(i))
}
// ResultNull sets the result of an SQL function.
// See: sqlite3_result_null, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultNull() {
C.sqlite3_result_null((*C.sqlite3_context)(c))
}
// ResultText sets the result of an SQL function.
// See: sqlite3_result_text, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultText(s string) {
h := (*reflect.StringHeader)(unsafe.Pointer(&s))
cs, l := (*C.char)(unsafe.Pointer(h.Data)), C.int(h.Len)
C.my_result_text((*C.sqlite3_context)(c), cs, l)
}
// ResultZeroblob sets the result of an SQL function.
// See: sqlite3_result_zeroblob, http://sqlite.org/c3ref/result_blob.html
func (c *SQLiteContext) ResultZeroblob(n int) {
C.sqlite3_result_zeroblob((*C.sqlite3_context)(c), C.int(n))
}
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