go-pulse/vendor/gopkg.in/sourcemap.v1/consumer.go
Péter Szilágyi 289b30715d Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.
2016-10-28 19:05:01 +02:00

313 lines
5.4 KiB
Go

package sourcemap // import "gopkg.in/sourcemap.v1"
import (
"encoding/json"
"errors"
"fmt"
"io"
"net/url"
"path"
"sort"
"strconv"
"strings"
"gopkg.in/sourcemap.v1/base64vlq"
)
type Consumer struct {
sourceRootURL *url.URL
smap *sourceMap
mappings []mapping
}
func Parse(mapURL string, b []byte) (*Consumer, error) {
smap := new(sourceMap)
err := json.Unmarshal(b, smap)
if err != nil {
return nil, err
}
if smap.Version != 3 {
return nil, errors.New("sourcemap: only 3rd version is supported")
}
var sourceRootURL *url.URL
if smap.SourceRoot != "" {
u, err := url.Parse(smap.SourceRoot)
if err != nil {
return nil, err
}
if u.IsAbs() {
sourceRootURL = u
}
} else if mapURL != "" {
u, err := url.Parse(mapURL)
if err != nil {
return nil, err
}
if u.IsAbs() {
u.Path = path.Dir(u.Path)
sourceRootURL = u
}
}
mappings, err := parseMappings(smap.Mappings)
if err != nil {
return nil, err
}
// Free memory.
smap.Mappings = ""
return &Consumer{
sourceRootURL: sourceRootURL,
smap: smap,
mappings: mappings,
}, nil
}
func (c *Consumer) File() string {
return c.smap.File
}
func (c *Consumer) Source(genLine, genCol int) (source, name string, line, col int, ok bool) {
i := sort.Search(len(c.mappings), func(i int) bool {
m := &c.mappings[i]
if m.genLine == genLine {
return m.genCol >= genCol
}
return m.genLine >= genLine
})
// Mapping not found.
if i == len(c.mappings) {
return
}
match := &c.mappings[i]
// Fuzzy match.
if match.genCol > genCol && i > 0 {
match = &c.mappings[i-1]
}
if match.sourcesInd >= 0 {
source = c.absSource(c.smap.Sources[match.sourcesInd])
}
if match.namesInd >= 0 {
iv := c.smap.Names[match.namesInd]
switch v := iv.(type) {
case string:
name = v
case float64:
name = strconv.FormatFloat(v, 'f', -1, 64)
default:
name = fmt.Sprint(iv)
}
}
line = match.sourceLine
col = match.sourceCol
ok = true
return
}
func (c *Consumer) absSource(source string) string {
if path.IsAbs(source) {
return source
}
if u, err := url.Parse(source); err == nil && u.IsAbs() {
return source
}
if c.sourceRootURL != nil {
u := *c.sourceRootURL
u.Path = path.Join(c.sourceRootURL.Path, source)
return u.String()
}
if c.smap.SourceRoot != "" {
return path.Join(c.smap.SourceRoot, source)
}
return source
}
func (c *Consumer) SourceName(genLine, genCol int, genName string) (name string, ok bool) {
ind := sort.Search(len(c.mappings), func(i int) bool {
m := c.mappings[i]
if m.genLine == genLine {
return m.genCol >= genCol
}
return m.genLine >= genLine
})
// Mapping not found.
if ind == len(c.mappings) {
return "", false
}
for i := ind; i >= 0; i-- {
m := c.mappings[i]
if m.namesInd == -1 {
continue
}
if c.smap.Names[m.namesInd] == "" {
}
}
return
}
type fn func() (fn, error)
type sourceMap struct {
Version int `json:"version"`
File string `json:"file"`
SourceRoot string `json:"sourceRoot"`
Sources []string `json:"sources"`
Names []interface{} `json:"names"`
Mappings string `json:"mappings"`
}
type mapping struct {
genLine int
genCol int
sourcesInd int
sourceLine int
sourceCol int
namesInd int
}
type mappings struct {
rd *strings.Reader
dec *base64vlq.Decoder
genLine int
genCol int
sourcesInd int
sourceLine int
sourceCol int
namesInd int
value mapping
values []mapping
}
func parseMappings(s string) ([]mapping, error) {
rd := strings.NewReader(s)
m := &mappings{
rd: rd,
dec: base64vlq.NewDecoder(rd),
genLine: 1,
sourceLine: 1,
}
m.zeroValue()
err := m.parse()
if err != nil {
return nil, err
}
return m.values, nil
}
func (m *mappings) parse() error {
next := m.parseGenCol
for {
c, err := m.rd.ReadByte()
if err == io.EOF {
m.pushValue()
return nil
} else if err != nil {
return err
}
switch c {
case ',':
m.pushValue()
next = m.parseGenCol
case ';':
m.pushValue()
m.genLine++
m.genCol = 0
next = m.parseGenCol
default:
m.rd.UnreadByte()
var err error
next, err = next()
if err != nil {
return err
}
}
}
}
func (m *mappings) parseGenCol() (fn, error) {
n, err := m.dec.Decode()
if err != nil {
return nil, err
}
m.genCol += n
m.value.genCol = m.genCol
return m.parseSourcesInd, nil
}
func (m *mappings) parseSourcesInd() (fn, error) {
n, err := m.dec.Decode()
if err != nil {
return nil, err
}
m.sourcesInd += n
m.value.sourcesInd = m.sourcesInd
return m.parseSourceLine, nil
}
func (m *mappings) parseSourceLine() (fn, error) {
n, err := m.dec.Decode()
if err != nil {
return nil, err
}
m.sourceLine += n
m.value.sourceLine = m.sourceLine
return m.parseSourceCol, nil
}
func (m *mappings) parseSourceCol() (fn, error) {
n, err := m.dec.Decode()
if err != nil {
return nil, err
}
m.sourceCol += n
m.value.sourceCol = m.sourceCol
return m.parseNamesInd, nil
}
func (m *mappings) parseNamesInd() (fn, error) {
n, err := m.dec.Decode()
if err != nil {
return nil, err
}
m.namesInd += n
m.value.namesInd = m.namesInd
return m.parseGenCol, nil
}
func (m *mappings) zeroValue() {
m.value = mapping{
genLine: m.genLine,
genCol: 0,
sourcesInd: -1,
sourceLine: 0,
sourceCol: 0,
namesInd: -1,
}
}
func (m *mappings) pushValue() {
m.values = append(m.values, m.value)
m.zeroValue()
}