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