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|
//go:build gojq_debug
// +build gojq_debug
package gojq
import (
"fmt"
"io"
"os"
"strconv"
"strings"
)
var (
debug bool
debugOut io.Writer
)
func init() {
if out := os.Getenv("GOJQ_DEBUG"); out != "" {
debug = true
if out == "stdout" {
debugOut = os.Stdout
} else {
debugOut = os.Stderr
}
}
}
type codeinfo struct {
name string
pc int
}
func (c *compiler) appendCodeInfo(x any) {
if !debug {
return
}
var name string
switch x := x.(type) {
case string:
name = x
default:
name = fmt.Sprint(x)
}
var diff int
if c.codes[len(c.codes)-1] != nil && c.codes[len(c.codes)-1].op == opret && strings.HasPrefix(name, "end of ") {
diff = -1
}
c.codeinfos = append(c.codeinfos, codeinfo{name, len(c.codes) + diff})
}
func (c *compiler) deleteCodeInfo(name string) {
for i := 0; i < len(c.codeinfos); i++ {
if strings.HasSuffix(c.codeinfos[i].name, name) {
copy(c.codeinfos[i:], c.codeinfos[i+1:])
c.codeinfos = c.codeinfos[:len(c.codeinfos)-1]
i--
}
}
}
func (env *env) lookupInfoName(pc int) string {
var name string
for _, ci := range env.codeinfos {
if ci.pc == pc {
if name != "" {
name += ", "
}
name += ci.name
}
}
return name
}
func (env *env) debugCodes() {
if !debug {
return
}
for i, c := range env.codes {
pc := i
switch c.op {
case opcall, opcallrec:
if x, ok := c.v.(int); ok {
pc = x
}
case opjump:
x := c.v.(int)
if x > 0 && env.codes[x-1].op == opscope {
pc = x - 1
}
}
var s string
if name := env.lookupInfoName(pc); name != "" {
switch c.op {
case opcall, opcallrec, opjump:
if !strings.HasPrefix(name, "module ") {
s = "\t## call " + name
break
}
fallthrough
default:
s = "\t## " + name
}
}
fmt.Fprintf(debugOut, "\t%d\t%s%s%s\n", i, formatOp(c.op, false), debugOperand(c), s)
}
fmt.Fprintln(debugOut, "\t"+strings.Repeat("-", 40)+"+")
}
func (env *env) debugState(pc int, backtrack bool) {
if !debug {
return
}
var sb strings.Builder
c := env.codes[pc]
fmt.Fprintf(&sb, "\t%d\t%s%s\t|", pc, formatOp(c.op, backtrack), debugOperand(c))
var xs []int
for i := env.stack.index; i >= 0; i = env.stack.data[i].next {
xs = append(xs, i)
}
for i := len(xs) - 1; i >= 0; i-- {
sb.WriteString("\t")
sb.WriteString(debugValue(env.stack.data[xs[i]].value))
}
switch c.op {
case opcall, opcallrec:
if x, ok := c.v.(int); ok {
pc = x
}
case opjump:
x := c.v.(int)
if x > 0 && env.codes[x-1].op == opscope {
pc = x - 1
}
}
if name := env.lookupInfoName(pc); name != "" {
switch c.op {
case opcall, opcallrec, opjump:
if !strings.HasPrefix(name, "module ") {
sb.WriteString("\t\t\t## call " + name)
break
}
fallthrough
default:
sb.WriteString("\t\t\t## " + name)
}
}
fmt.Fprintln(debugOut, sb.String())
}
func formatOp(c opcode, backtrack bool) string {
if backtrack {
return c.String() + " <backtrack>" + strings.Repeat(" ", 13-len(c.String()))
}
return c.String() + strings.Repeat(" ", 25-len(c.String()))
}
func (env *env) debugForks(pc int, op string) {
if !debug {
return
}
var sb strings.Builder
for i, v := range env.forks {
if i > 0 {
sb.WriteByte('\t')
}
if i == len(env.forks)-1 {
sb.WriteByte('<')
}
fmt.Fprintf(&sb, "%d, %s", v.pc, debugValue(env.stack.data[v.stackindex].value))
if i == len(env.forks)-1 {
sb.WriteByte('>')
}
}
fmt.Fprintf(debugOut, "\t-\t%s%s%d\t|\t%s\n", op, strings.Repeat(" ", 22), pc, sb.String())
}
func debugOperand(c *code) string {
switch c.op {
case opcall, opcallrec:
switch v := c.v.(type) {
case int:
return strconv.Itoa(v)
case [3]any:
return fmt.Sprintf("%s/%d", v[2], v[1])
default:
panic(c)
}
default:
return debugValue(c.v)
}
}
func debugValue(v any) string {
switch v := v.(type) {
case Iter:
return fmt.Sprintf("gojq.Iter(%#v)", v)
case []pathValue:
return fmt.Sprintf("[]gojq.pathValue(%v)", v)
case JQValue:
return fmt.Sprintf("gojq.JQValue(%s)", Preview(v))
case [2]int:
return fmt.Sprintf("[%d,%d]", v[0], v[1])
case [3]int:
return fmt.Sprintf("[%d,%d,%d]", v[0], v[1], v[2])
case [3]any:
return fmt.Sprintf("[%v,%v,%v]", v[0], v[1], v[2])
case allocator:
return fmt.Sprintf("%v", v)
default:
return Preview(v)
}
}
|
