1 files changed, 0 insertions, 414 deletions
diff --git a/vendor/github.com/mattn/go-sqlite3/sqlite3_trace.go b/vendor/github.com/mattn/go-sqlite3/sqlite3_trace.go
deleted file mode 100644
index a75f52ab6..000000000
--- a/vendor/github.com/mattn/go-sqlite3/sqlite3_trace.go
+++ /dev/null
@@ -1,414 +0,0 @@
-// Copyright (C) 2016 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.
-// +build trace
-
-package sqlite3
-
-/*
-#ifndef USE_LIBSQLITE3
-#include <sqlite3-binding.h>
-#else
-#include <sqlite3.h>
-#endif
-#include <stdlib.h>
-
-void stepTrampoline(sqlite3_context*, int, sqlite3_value**);
-void doneTrampoline(sqlite3_context*);
-int traceCallbackTrampoline(unsigned int traceEventCode, void *ctx, void *p, void *x);
-*/
-import "C"
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-	"strings"
-	"sync"
-	"unsafe"
-)
-
-// Trace... constants identify the possible events causing callback invocation.
-// Values are same as the corresponding SQLite Trace Event Codes.
-const (
-	TraceStmt    = C.SQLITE_TRACE_STMT
-	TraceProfile = C.SQLITE_TRACE_PROFILE
-	TraceRow     = C.SQLITE_TRACE_ROW
-	TraceClose   = C.SQLITE_TRACE_CLOSE
-)
-
-type TraceInfo struct {
-	// Pack together the shorter fields, to keep the struct smaller.
-	// On a 64-bit machine there would be padding
-	// between EventCode and ConnHandle; having AutoCommit here is "free":
-	EventCode  uint32
-	AutoCommit bool
-	ConnHandle uintptr
-
-	// Usually filled, unless EventCode = TraceClose = SQLITE_TRACE_CLOSE:
-	// identifier for a prepared statement:
-	StmtHandle uintptr
-
-	// Two strings filled when EventCode = TraceStmt = SQLITE_TRACE_STMT:
-	// (1) either the unexpanded SQL text of the prepared statement, or
-	//     an SQL comment that indicates the invocation of a trigger;
-	// (2) expanded SQL, if requested and if (1) is not an SQL comment.
-	StmtOrTrigger string
-	ExpandedSQL   string // only if requested (TraceConfig.WantExpandedSQL = true)
-
-	// filled when EventCode = TraceProfile = SQLITE_TRACE_PROFILE:
-	// estimated number of nanoseconds that the prepared statement took to run:
-	RunTimeNanosec int64
-
-	DBError Error
-}
-
-// TraceUserCallback gives the signature for a trace function
-// provided by the user (Go application programmer).
-// SQLite 3.14 documentation (as of September 2, 2016)
-// for SQL Trace Hook = sqlite3_trace_v2():
-// The integer return value from the callback is currently ignored,
-// though this may change in future releases. Callback implementations
-// should return zero to ensure future compatibility.
-type TraceUserCallback func(TraceInfo) int
-
-type TraceConfig struct {
-	Callback        TraceUserCallback
-	EventMask       C.uint
-	WantExpandedSQL bool
-}
-
-func fillDBError(dbErr *Error, db *C.sqlite3) {
-	// See SQLiteConn.lastError(), in file 'sqlite3.go' at the time of writing (Sept 5, 2016)
-	dbErr.Code = ErrNo(C.sqlite3_errcode(db))
-	dbErr.ExtendedCode = ErrNoExtended(C.sqlite3_extended_errcode(db))
-	dbErr.err = C.GoString(C.sqlite3_errmsg(db))
-}
-
-func fillExpandedSQL(info *TraceInfo, db *C.sqlite3, pStmt unsafe.Pointer) {
-	if pStmt == nil {
-		panic("No SQLite statement pointer in P arg of trace_v2 callback")
-	}
-
-	expSQLiteCStr := C.sqlite3_expanded_sql((*C.sqlite3_stmt)(pStmt))
-	if expSQLiteCStr == nil {
-		fillDBError(&info.DBError, db)
-		return
-	}
-	info.ExpandedSQL = C.GoString(expSQLiteCStr)
-}
-
-//export traceCallbackTrampoline
-func traceCallbackTrampoline(
-	traceEventCode C.uint,
-	// Parameter named 'C' in SQLite docs = Context given at registration:
-	ctx unsafe.Pointer,
-	// Parameter named 'P' in SQLite docs (Primary event data?):
-	p unsafe.Pointer,
-	// Parameter named 'X' in SQLite docs (eXtra event data?):
-	xValue unsafe.Pointer) C.int {
-
-	if ctx == nil {
-		panic(fmt.Sprintf("No context (ev 0x%x)", traceEventCode))
-	}
-
-	contextDB := (*C.sqlite3)(ctx)
-	connHandle := uintptr(ctx)
-
-	var traceConf TraceConfig
-	var found bool
-	if traceEventCode == TraceClose {
-		// clean up traceMap: 'pop' means get and delete
-		traceConf, found = popTraceMapping(connHandle)
-	} else {
-		traceConf, found = lookupTraceMapping(connHandle)
-	}
-
-	if !found {
-		panic(fmt.Sprintf("Mapping not found for handle 0x%x (ev 0x%x)",
-			connHandle, traceEventCode))
-	}
-
-	var info TraceInfo
-
-	info.EventCode = uint32(traceEventCode)
-	info.AutoCommit = (int(C.sqlite3_get_autocommit(contextDB)) != 0)
-	info.ConnHandle = connHandle
-
-	switch traceEventCode {
-	case TraceStmt:
-		info.StmtHandle = uintptr(p)
-
-		var xStr string
-		if xValue != nil {
-			xStr = C.GoString((*C.char)(xValue))
-		}
-		info.StmtOrTrigger = xStr
-		if !strings.HasPrefix(xStr, "--") {
-			// Not SQL comment, therefore the current event
-			// is not related to a trigger.
-			// The user might want to receive the expanded SQL;
-			// let's check:
-			if traceConf.WantExpandedSQL {
-				fillExpandedSQL(&info, contextDB, p)
-			}
-		}
-
-	case TraceProfile:
-		info.StmtHandle = uintptr(p)
-
-		if xValue == nil {
-			panic("NULL pointer in X arg of trace_v2 callback for SQLITE_TRACE_PROFILE event")
-		}
-
-		info.RunTimeNanosec = *(*int64)(xValue)
-
-		// sample the error //TODO: is it safe? is it useful?
-		fillDBError(&info.DBError, contextDB)
-
-	case TraceRow:
-		info.StmtHandle = uintptr(p)
-
-	case TraceClose:
-		handle := uintptr(p)
-		if handle != info.ConnHandle {
-			panic(fmt.Sprintf("Different conn handle 0x%x (expected 0x%x) in SQLITE_TRACE_CLOSE event.",
-				handle, info.ConnHandle))
-		}
-
-	default:
-		// Pass unsupported events to the user callback (if configured);
-		// let the user callback decide whether to panic or ignore them.
-	}
-
-	// Do not execute user callback when the event was not requested by user!
-	// Remember that the Close event is always selected when
-	// registering this callback trampoline with SQLite --- for cleanup.
-	// In the future there may be more events forced to "selected" in SQLite
-	// for the driver's needs.
-	if traceConf.EventMask&traceEventCode == 0 {
-		return 0
-	}
-
-	r := 0
-	if traceConf.Callback != nil {
-		r = traceConf.Callback(info)
-	}
-	return C.int(r)
-}
-
-type traceMapEntry struct {
-	config TraceConfig
-}
-
-var traceMapLock sync.Mutex
-var traceMap = make(map[uintptr]traceMapEntry)
-
-func addTraceMapping(connHandle uintptr, traceConf TraceConfig) {
-	traceMapLock.Lock()
-	defer traceMapLock.Unlock()
-
-	oldEntryCopy, found := traceMap[connHandle]
-	if found {
-		panic(fmt.Sprintf("Adding trace config %v: handle 0x%x already registered (%v).",
-			traceConf, connHandle, oldEntryCopy.config))
-	}
-	traceMap[connHandle] = traceMapEntry{config: traceConf}
-	fmt.Printf("Added trace config %v: handle 0x%x.\n", traceConf, connHandle)
-}
-
-func lookupTraceMapping(connHandle uintptr) (TraceConfig, bool) {
-	traceMapLock.Lock()
-	defer traceMapLock.Unlock()
-
-	entryCopy, found := traceMap[connHandle]
-	return entryCopy.config, found
-}
-
-// 'pop' = get and delete from map before returning the value to the caller
-func popTraceMapping(connHandle uintptr) (TraceConfig, bool) {
-	traceMapLock.Lock()
-	defer traceMapLock.Unlock()
-
-	entryCopy, found := traceMap[connHandle]
-	if found {
-		delete(traceMap, connHandle)
-		fmt.Printf("Pop handle 0x%x: deleted trace config %v.\n", connHandle, entryCopy.config)
-	}
-	return entryCopy.config, found
-}
-
-// RegisterAggregator makes a Go type available as a SQLite aggregation function.
-//
-// Because aggregation is incremental, it's implemented in Go with a
-// type that has 2 methods: func Step(values) accumulates one row of
-// data into the accumulator, and func Done() ret finalizes and
-// returns the aggregate value. "values" and "ret" may be any type
-// supported by RegisterFunc.
-//
-// RegisterAggregator takes as implementation a constructor function
-// that constructs an instance of the aggregator type each time an
-// aggregation begins. The constructor must return a pointer to a
-// type, or an interface that implements Step() and Done().
-//
-// The constructor function and the Step/Done methods may optionally
-// return an error in addition to their other return values.
-//
-// See _example/go_custom_funcs for a detailed example.
-func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool) error {
-	var ai aggInfo
-	ai.constructor = reflect.ValueOf(impl)
-	t := ai.constructor.Type()
-	if t.Kind() != reflect.Func {
-		return errors.New("non-function passed to RegisterAggregator")
-	}
-	if t.NumOut() != 1 && t.NumOut() != 2 {
-		return errors.New("SQLite aggregator constructors must return 1 or 2 values")
-	}
-	if t.NumOut() == 2 && !t.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
-		return errors.New("Second return value of SQLite function must be error")
-	}
-	if t.NumIn() != 0 {
-		return errors.New("SQLite aggregator constructors must not have arguments")
-	}
-
-	agg := t.Out(0)
-	switch agg.Kind() {
-	case reflect.Ptr, reflect.Interface:
-	default:
-		return errors.New("SQlite aggregator constructor must return a pointer object")
-	}
-	stepFn, found := agg.MethodByName("Step")
-	if !found {
-		return errors.New("SQlite aggregator doesn't have a Step() function")
-	}
-	step := stepFn.Type
-	if step.NumOut() != 0 && step.NumOut() != 1 {
-		return errors.New("SQlite aggregator Step() function must return 0 or 1 values")
-	}
-	if step.NumOut() == 1 && !step.Out(0).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
-		return errors.New("type of SQlite aggregator Step() return value must be error")
-	}
-
-	stepNArgs := step.NumIn()
-	start := 0
-	if agg.Kind() == reflect.Ptr {
-		// Skip over the method receiver
-		stepNArgs--
-		start++
-	}
-	if step.IsVariadic() {
-		stepNArgs--
-	}
-	for i := start; i < start+stepNArgs; i++ {
-		conv, err := callbackArg(step.In(i))
-		if err != nil {
-			return err
-		}
-		ai.stepArgConverters = append(ai.stepArgConverters, conv)
-	}
-	if step.IsVariadic() {
-		conv, err := callbackArg(t.In(start + stepNArgs).Elem())
-		if err != nil {
-			return err
-		}
-		ai.stepVariadicConverter = conv
-		// Pass -1 to sqlite so that it allows any number of
-		// arguments. The call helper verifies that the minimum number
-		// of arguments is present for variadic functions.
-		stepNArgs = -1
-	}
-
-	doneFn, found := agg.MethodByName("Done")
-	if !found {
-		return errors.New("SQlite aggregator doesn't have a Done() function")
-	}
-	done := doneFn.Type
-	doneNArgs := done.NumIn()
-	if agg.Kind() == reflect.Ptr {
-		// Skip over the method receiver
-		doneNArgs--
-	}
-	if doneNArgs != 0 {
-		return errors.New("SQlite aggregator Done() function must have no arguments")
-	}
-	if done.NumOut() != 1 && done.NumOut() != 2 {
-		return errors.New("SQLite aggregator Done() function must return 1 or 2 values")
-	}
-	if done.NumOut() == 2 && !done.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
-		return errors.New("second return value of SQLite aggregator Done() function must be error")
-	}
-
-	conv, err := callbackRet(done.Out(0))
-	if err != nil {
-		return err
-	}
-	ai.doneRetConverter = conv
-	ai.active = make(map[int64]reflect.Value)
-	ai.next = 1
-
-	// ai must outlast the database connection, or we'll have dangling pointers.
-	c.aggregators = append(c.aggregators, &ai)
-
-	cname := C.CString(name)
-	defer C.free(unsafe.Pointer(cname))
-	opts := C.SQLITE_UTF8
-	if pure {
-		opts |= C.SQLITE_DETERMINISTIC
-	}
-	rv := sqlite3CreateFunction(c.db, cname, C.int(stepNArgs), C.int(opts), newHandle(c, &ai), nil, C.stepTrampoline, C.doneTrampoline)
-	if rv != C.SQLITE_OK {
-		return c.lastError()
-	}
-	return nil
-}
-
-// SetTrace installs or removes the trace callback for the given database connection.
-// It's not named 'RegisterTrace' because only one callback can be kept and called.
-// Calling SetTrace a second time on same database connection
-// overrides (cancels) any prior callback and all its settings:
-// event mask, etc.
-func (c *SQLiteConn) SetTrace(requested *TraceConfig) error {
-	connHandle := uintptr(unsafe.Pointer(c.db))
-
-	_, _ = popTraceMapping(connHandle)
-
-	if requested == nil {
-		// The traceMap entry was deleted already by popTraceMapping():
-		// can disable all events now, no need to watch for TraceClose.
-		err := c.setSQLiteTrace(0)
-		return err
-	}
-
-	reqCopy := *requested
-
-	// Disable potentially expensive operations
-	// if their result will not be used. We are doing this
-	// just in case the caller provided nonsensical input.
-	if reqCopy.EventMask&TraceStmt == 0 {
-		reqCopy.WantExpandedSQL = false
-	}
-
-	addTraceMapping(connHandle, reqCopy)
-
-	// The callback trampoline function does cleanup on Close event,
-	// regardless of the presence or absence of the user callback.
-	// Therefore it needs the Close event to be selected:
-	actualEventMask := uint(reqCopy.EventMask | TraceClose)
-	err := c.setSQLiteTrace(actualEventMask)
-	return err
-}
-
-func (c *SQLiteConn) setSQLiteTrace(sqliteEventMask uint) error {
-	rv := C.sqlite3_trace_v2(c.db,
-		C.uint(sqliteEventMask),
-		(*[0]byte)(unsafe.Pointer(C.traceCallbackTrampoline)),
-		unsafe.Pointer(c.db)) // Fourth arg is same as first: we are
-	// passing the database connection handle as callback context.
-
-	if rv != C.SQLITE_OK {
-		return c.lastError()
-	}
-	return nil
-}