111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
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// Copyright 2020 The CCGO Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ccgo // import "modernc.org/ccgo/v3/lib"
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import (
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"fmt"
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"math"
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"math/big"
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"modernc.org/cc/v3"
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)
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var (
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reservedNames = map[string]bool{
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"bool": false, // ccgo can use
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"break": true, // keyword
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"case": true, // keyword
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"chan": true, // keyword
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"const": true, // keyword
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"continue": true, // keyword
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"default": true, // keyword
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"defer": true, // keyword
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"else": true, // keyword
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"fallthrough": true, // keyword
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"false": false, // ccgo can use
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"float32": false, // ccgo can use
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"float64": false, // ccgo can use
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"for": true, // keyword
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"func": true, // keyword
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"go": true, // keyword
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"goto": true, // keyword
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"if": true, // keyword
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"import": true, // keyword
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"init": false, // special name
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"int16": false, // ccgo can use
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"int32": false, // ccgo can use
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"int64": false, // ccgo can use
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"int8": false, // ccgo can use
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"interface": true, // keyword
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"map": true, // keyword
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"math": false, // package name
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"nil": false, // ccgo can use
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"package": true, // keyword
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"range": true, // keyword
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"return": true, // keyword
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"select": true, // keyword
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"struct": true, // keyword
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"switch": true, // keyword
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"true": false, // ccgo can use
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"type": true, // keyword
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"types": false, // package name
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"uint16": false, // ccgo can use
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"uint32": false, // ccgo can use
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"uint64": false, // ccgo can use
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"uint8": false, // ccgo can use
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"uintptr": false, // ccgo can use
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"unsafe": false, // package name
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"var": true, // keyword
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}
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reservedIds []cc.StringID
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maxInt32 = big.NewInt(math.MaxInt32)
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maxInt64 = big.NewInt(math.MaxInt64)
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maxUint32 = big.NewInt(math.MaxUint32)
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maxUint64 = big.NewInt(0).SetUint64(math.MaxUint64)
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minInt32 = big.NewInt(math.MinInt32)
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minInt64 = big.NewInt(math.MinInt64)
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)
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func init() {
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for k := range reservedNames {
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reservedIds = append(reservedIds, cc.String(k))
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}
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}
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type scope map[cc.StringID]int32
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func newScope() scope {
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s := scope{}
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for _, k := range reservedIds {
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s[k] = 0
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}
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return s
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}
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func (s scope) take(t cc.StringID) string {
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if t == 0 {
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panic(todo("internal error"))
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}
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n, ok := s[t]
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if !ok {
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s[t] = 0
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return t.String()
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}
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for {
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n++
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s[t] = n
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r := fmt.Sprintf("%s%d", t, n)
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id := cc.String(r)
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if _, ok := s[id]; !ok {
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s[id] = 0
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return r
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}
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}
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}
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