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[chore] bump dependencies (#4339)

Browse source 
- github.com/KimMachineGun/automemlimit v0.7.4
- github.com/miekg/dns v1.1.67
- github.com/minio/minio-go/v7 v7.0.95
- github.com/spf13/pflag v1.0.7
- github.com/tdewolff/minify/v2 v2.23.9
- github.com/uptrace/bun v1.2.15
- github.com/uptrace/bun/dialect/pgdialect v1.2.15
- github.com/uptrace/bun/dialect/sqlitedialect v1.2.15
- github.com/uptrace/bun/extra/bunotel v1.2.15
- golang.org/x/image v0.29.0
- golang.org/x/net v0.42.0

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4339
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>
This commit is contained in:
kim 2025-07-22 18:00:27 +02:00 • committed by kim
commit c00cad2ceb
76 changed files with 5544 additions and 886 deletions
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15
vendor/github.com/grafana/regexp/.gitignore generated vendored Normal file
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# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/

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vendor/github.com/grafana/regexp/LICENSE generated vendored Normal file
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Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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vendor/github.com/grafana/regexp/README.md generated vendored Normal file
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# Grafana Go regexp package
This repo is a fork of the upstream Go `regexp` package, with some code optimisations to make it run faster.
All the optimisations have been submitted upstream, but not yet merged.
All semantics are the same, and the optimised code passes all tests from upstream.
The `main` branch is non-optimised: switch over to [`speedup`](https://github.com/grafana/regexp/tree/speedup) branch for the improved code.
## Benchmarks:
![image](https://user-images.githubusercontent.com/8125524/152182951-856549ed-6044-4285-b799-69b31f598e32.png)

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vendor/github.com/grafana/regexp/backtrack.go generated vendored Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// backtrack is a regular expression search with submatch
// tracking for small regular expressions and texts. It allocates
// a bit vector with (length of input) * (length of prog) bits,
// to make sure it never explores the same (character position, instruction)
// state multiple times. This limits the search to run in time linear in
// the length of the test.
//
// backtrack is a fast replacement for the NFA code on small
// regexps when onepass cannot be used.
package regexp
import (
"regexp/syntax"
"sync"
)
// A job is an entry on the backtracker's job stack. It holds
// the instruction pc and the position in the input.
type job struct {
pc uint32
arg bool
pos int
}
const (
visitedBits = 32
maxBacktrackProg = 500 // len(prog.Inst) <= max
maxBacktrackVector = 256 * 1024 // bit vector size <= max (bits)
)
// bitState holds state for the backtracker.
type bitState struct {
end int
cap []int
matchcap []int
jobs []job
visited []uint32
inputs inputs
}
var bitStatePool sync.Pool
func newBitState() *bitState {
b, ok := bitStatePool.Get().(*bitState)
if !ok {
b = new(bitState)
}
return b
}
func freeBitState(b *bitState) {
b.inputs.clear()
bitStatePool.Put(b)
}
// maxBitStateLen returns the maximum length of a string to search with
// the backtracker using prog.
func maxBitStateLen(prog *syntax.Prog) int {
if !shouldBacktrack(prog) {
return 0
}
return maxBacktrackVector / len(prog.Inst)
}
// shouldBacktrack reports whether the program is too
// long for the backtracker to run.
func shouldBacktrack(prog *syntax.Prog) bool {
return len(prog.Inst) <= maxBacktrackProg
}
// reset resets the state of the backtracker.
// end is the end position in the input.
// ncap is the number of captures.
func (b *bitState) reset(prog *syntax.Prog, end int, ncap int) {
b.end = end
if cap(b.jobs) == 0 {
b.jobs = make([]job, 0, 256)
} else {
b.jobs = b.jobs[:0]
}
visitedSize := (len(prog.Inst)*(end+1) + visitedBits - 1) / visitedBits
if cap(b.visited) < visitedSize {
b.visited = make([]uint32, visitedSize, maxBacktrackVector/visitedBits)
} else {
b.visited = b.visited[:visitedSize]
clear(b.visited) // set to 0
}
if cap(b.cap) < ncap {
b.cap = make([]int, ncap)
} else {
b.cap = b.cap[:ncap]
}
for i := range b.cap {
b.cap[i] = -1
}
if cap(b.matchcap) < ncap {
b.matchcap = make([]int, ncap)
} else {
b.matchcap = b.matchcap[:ncap]
}
for i := range b.matchcap {
b.matchcap[i] = -1
}
}
// shouldVisit reports whether the combination of (pc, pos) has not
// been visited yet.
func (b *bitState) shouldVisit(pc uint32, pos int) bool {
n := uint(int(pc)*(b.end+1) + pos)
if b.visited[n/visitedBits]&(1<<(n&(visitedBits-1))) != 0 {
return false
}
b.visited[n/visitedBits] |= 1 << (n & (visitedBits - 1))
return true
}
// push pushes (pc, pos, arg) onto the job stack if it should be
// visited.
func (b *bitState) push(re *Regexp, pc uint32, pos int, arg bool) {
// Only check shouldVisit when arg is false.
// When arg is true, we are continuing a previous visit.
if re.prog.Inst[pc].Op != syntax.InstFail && (arg || b.shouldVisit(pc, pos)) {
b.jobs = append(b.jobs, job{pc: pc, arg: arg, pos: pos})
}
}
// tryBacktrack runs a backtracking search starting at pos.
func (re *Regexp) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool {
longest := re.longest
b.push(re, pc, pos, false)
for len(b.jobs) > 0 {
l := len(b.jobs) - 1
// Pop job off the stack.
pc := b.jobs[l].pc
pos := b.jobs[l].pos
arg := b.jobs[l].arg
b.jobs = b.jobs[:l]
// Optimization: rather than push and pop,
// code that is going to Push and continue
// the loop simply updates ip, p, and arg
// and jumps to CheckAndLoop. We have to
// do the ShouldVisit check that Push
// would have, but we avoid the stack
// manipulation.
goto Skip
CheckAndLoop:
if !b.shouldVisit(pc, pos) {
continue
}
Skip:
inst := &re.prog.Inst[pc]
switch inst.Op {
default:
panic("bad inst")
case syntax.InstFail:
panic("unexpected InstFail")
case syntax.InstAlt:
// Cannot just
// b.push(inst.Out, pos, false)
// b.push(inst.Arg, pos, false)
// If during the processing of inst.Out, we encounter
// inst.Arg via another path, we want to process it then.
// Pushing it here will inhibit that. Instead, re-push
// inst with arg==true as a reminder to push inst.Arg out
// later.
if arg {
// Finished inst.Out; try inst.Arg.
arg = false
pc = inst.Arg
goto CheckAndLoop
} else {
b.push(re, pc, pos, true)
pc = inst.Out
goto CheckAndLoop
}
case syntax.InstAltMatch:
// One opcode consumes runes; the other leads to match.
switch re.prog.Inst[inst.Out].Op {
case syntax.InstRune, syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL:
// inst.Arg is the match.
b.push(re, inst.Arg, pos, false)
pc = inst.Arg
pos = b.end
goto CheckAndLoop
}
// inst.Out is the match - non-greedy
b.push(re, inst.Out, b.end, false)
pc = inst.Out
goto CheckAndLoop
case syntax.InstRune:
r, width := i.step(pos)
if !inst.MatchRune(r) {
continue
}
pos += width
pc = inst.Out
goto CheckAndLoop
case syntax.InstRune1:
r, width := i.step(pos)
if r != inst.Rune[0] {
continue
}
pos += width
pc = inst.Out
goto CheckAndLoop
case syntax.InstRuneAnyNotNL:
r, width := i.step(pos)
if r == '\n' || r == endOfText {
continue
}
pos += width
pc = inst.Out
goto CheckAndLoop
case syntax.InstRuneAny:
r, width := i.step(pos)
if r == endOfText {
continue
}
pos += width
pc = inst.Out
goto CheckAndLoop
case syntax.InstCapture:
if arg {
// Finished inst.Out; restore the old value.
b.cap[inst.Arg] = pos
continue
} else {
if inst.Arg < uint32(len(b.cap)) {
// Capture pos to register, but save old value.
b.push(re, pc, b.cap[inst.Arg], true) // come back when we're done.
b.cap[inst.Arg] = pos
}
pc = inst.Out
goto CheckAndLoop
}
case syntax.InstEmptyWidth:
flag := i.context(pos)
if !flag.match(syntax.EmptyOp(inst.Arg)) {
continue
}
pc = inst.Out
goto CheckAndLoop
case syntax.InstNop:
pc = inst.Out
goto CheckAndLoop
case syntax.InstMatch:
// We found a match. If the caller doesn't care
// where the match is, no point going further.
if len(b.cap) == 0 {
return true
}
// Record best match so far.
// Only need to check end point, because this entire
// call is only considering one start position.
if len(b.cap) > 1 {
b.cap[1] = pos
}
if old := b.matchcap[1]; old == -1 || (longest && pos > 0 && pos > old) {
copy(b.matchcap, b.cap)
}
// If going for first match, we're done.
if !longest {
return true
}
// If we used the entire text, no longer match is possible.
if pos == b.end {
return true
}
// Otherwise, continue on in hope of a longer match.
continue
}
}
return longest && len(b.matchcap) > 1 && b.matchcap[1] >= 0
}
// backtrack runs a backtracking search of prog on the input starting at pos.
func (re *Regexp) backtrack(ib []byte, is string, pos int, ncap int, dstCap []int) []int {
startCond := re.cond
if startCond == ^syntax.EmptyOp(0) { // impossible
return nil
}
if startCond&syntax.EmptyBeginText != 0 && pos != 0 {
// Anchored match, past beginning of text.
return nil
}
b := newBitState()
i, end := b.inputs.init(nil, ib, is)
b.reset(re.prog, end, ncap)
// Anchored search must start at the beginning of the input
if startCond&syntax.EmptyBeginText != 0 {
if len(b.cap) > 0 {
b.cap[0] = pos
}
if !re.tryBacktrack(b, i, uint32(re.prog.Start), pos) {
freeBitState(b)
return nil
}
} else {
// Unanchored search, starting from each possible text position.
// Notice that we have to try the empty string at the end of
// the text, so the loop condition is pos <= end, not pos < end.
// This looks like it's quadratic in the size of the text,
// but we are not clearing visited between calls to TrySearch,
// so no work is duplicated and it ends up still being linear.
width := -1
for ; pos <= end && width != 0; pos += width {
if len(re.prefix) > 0 {
// Match requires literal prefix; fast search for it.
advance := i.index(re, pos)
if advance < 0 {
freeBitState(b)
return nil
}
pos += advance
}
if len(b.cap) > 0 {
b.cap[0] = pos
}
if re.tryBacktrack(b, i, uint32(re.prog.Start), pos) {
// Match must be leftmost; done.
goto Match
}
_, width = i.step(pos)
}
freeBitState(b)
return nil
}
Match:
dstCap = append(dstCap, b.matchcap...)
freeBitState(b)
return dstCap
}

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vendor/github.com/grafana/regexp/exec.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package regexp
import (
"io"
"regexp/syntax"
"sync"
)
// A queue is a 'sparse array' holding pending threads of execution.
// See https://research.swtch.com/2008/03/using-uninitialized-memory-for-fun-and.html
type queue struct {
sparse []uint32
dense []entry
}
// An entry is an entry on a queue.
// It holds both the instruction pc and the actual thread.
// Some queue entries are just place holders so that the machine
// knows it has considered that pc. Such entries have t == nil.
type entry struct {
pc uint32
t *thread
}
// A thread is the state of a single path through the machine:
// an instruction and a corresponding capture array.
// See https://swtch.com/~rsc/regexp/regexp2.html
type thread struct {
inst *syntax.Inst
cap []int
}
// A machine holds all the state during an NFA simulation for p.
type machine struct {
re *Regexp // corresponding Regexp
p *syntax.Prog // compiled program
q0, q1 queue // two queues for runq, nextq
pool []*thread // pool of available threads
matched bool // whether a match was found
matchcap []int // capture information for the match
inputs inputs
}
type inputs struct {
// cached inputs, to avoid allocation
bytes inputBytes
string inputString
reader inputReader
}
func (i *inputs) newBytes(b []byte) input {
i.bytes.str = b
return &i.bytes
}
func (i *inputs) newString(s string) input {
i.string.str = s
return &i.string
}
func (i *inputs) newReader(r io.RuneReader) input {
i.reader.r = r
i.reader.atEOT = false
i.reader.pos = 0
return &i.reader
}
func (i *inputs) clear() {
// We need to clear 1 of these.
// Avoid the expense of clearing the others (pointer write barrier).
if i.bytes.str != nil {
i.bytes.str = nil
} else if i.reader.r != nil {
i.reader.r = nil
} else {
i.string.str = ""
}
}
func (i *inputs) init(r io.RuneReader, b []byte, s string) (input, int) {
if r != nil {
return i.newReader(r), 0
}
if b != nil {
return i.newBytes(b), len(b)
}
return i.newString(s), len(s)
}
func (m *machine) init(ncap int) {
for _, t := range m.pool {
t.cap = t.cap[:ncap]
}
m.matchcap = m.matchcap[:ncap]
}
// alloc allocates a new thread with the given instruction.
// It uses the free pool if possible.
func (m *machine) alloc(i *syntax.Inst) *thread {
var t *thread
if n := len(m.pool); n > 0 {
t = m.pool[n-1]
m.pool = m.pool[:n-1]
} else {
t = new(thread)
t.cap = make([]int, len(m.matchcap), cap(m.matchcap))
}
t.inst = i
return t
}
// A lazyFlag is a lazily-evaluated syntax.EmptyOp,
// for checking zero-width flags like ^ $ \A \z \B \b.
// It records the pair of relevant runes and does not
// determine the implied flags until absolutely necessary
// (most of the time, that means never).
type lazyFlag uint64
func newLazyFlag(r1, r2 rune) lazyFlag {
return lazyFlag(uint64(r1)<<32 | uint64(uint32(r2)))
}
func (f lazyFlag) match(op syntax.EmptyOp) bool {
if op == 0 {
return true
}
r1 := rune(f >> 32)
if op&syntax.EmptyBeginLine != 0 {
if r1 != '\n' && r1 >= 0 {
return false
}
op &^= syntax.EmptyBeginLine
}
if op&syntax.EmptyBeginText != 0 {
if r1 >= 0 {
return false
}
op &^= syntax.EmptyBeginText
}
if op == 0 {
return true
}
r2 := rune(f)
if op&syntax.EmptyEndLine != 0 {
if r2 != '\n' && r2 >= 0 {
return false
}
op &^= syntax.EmptyEndLine
}
if op&syntax.EmptyEndText != 0 {
if r2 >= 0 {
return false
}
op &^= syntax.EmptyEndText
}
if op == 0 {
return true
}
if syntax.IsWordChar(r1) != syntax.IsWordChar(r2) {
op &^= syntax.EmptyWordBoundary
} else {
op &^= syntax.EmptyNoWordBoundary
}
return op == 0
}
// match runs the machine over the input starting at pos.
// It reports whether a match was found.
// If so, m.matchcap holds the submatch information.
func (m *machine) match(i input, pos int) bool {
startCond := m.re.cond
if startCond == ^syntax.EmptyOp(0) { // impossible
return false
}
m.matched = false
for i := range m.matchcap {
m.matchcap[i] = -1
}
runq, nextq := &m.q0, &m.q1
r, r1 := endOfText, endOfText
width, width1 := 0, 0
r, width = i.step(pos)
if r != endOfText {
r1, width1 = i.step(pos + width)
}
var flag lazyFlag
if pos == 0 {
flag = newLazyFlag(-1, r)
} else {
flag = i.context(pos)
}
for {
if len(runq.dense) == 0 {
if startCond&syntax.EmptyBeginText != 0 && pos != 0 {
// Anchored match, past beginning of text.
break
}
if m.matched {
// Have match; finished exploring alternatives.
break
}
if len(m.re.prefix) > 0 && r1 != m.re.prefixRune && i.canCheckPrefix() {
// Match requires literal prefix; fast search for it.
advance := i.index(m.re, pos)
if advance < 0 {
break
}
pos += advance
r, width = i.step(pos)
r1, width1 = i.step(pos + width)
}
}
if !m.matched {
if len(m.matchcap) > 0 {
m.matchcap[0] = pos
}
m.add(runq, uint32(m.p.Start), pos, m.matchcap, &flag, nil)
}
flag = newLazyFlag(r, r1)
m.step(runq, nextq, pos, pos+width, r, &flag)
if width == 0 {
break
}
if len(m.matchcap) == 0 && m.matched {
// Found a match and not paying attention
// to where it is, so any match will do.
break
}
pos += width
r, width = r1, width1
if r != endOfText {
r1, width1 = i.step(pos + width)
}
runq, nextq = nextq, runq
}
m.clear(nextq)
return m.matched
}
// clear frees all threads on the thread queue.
func (m *machine) clear(q *queue) {
for _, d := range q.dense {
if d.t != nil {
m.pool = append(m.pool, d.t)
}
}
q.dense = q.dense[:0]
}
// step executes one step of the machine, running each of the threads
// on runq and appending new threads to nextq.
// The step processes the rune c (which may be endOfText),
// which starts at position pos and ends at nextPos.
// nextCond gives the setting for the empty-width flags after c.
func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond *lazyFlag) {
longest := m.re.longest
for j := 0; j < len(runq.dense); j++ {
d := &runq.dense[j]
t := d.t
if t == nil {
continue
}
if longest && m.matched && len(t.cap) > 0 && m.matchcap[0] < t.cap[0] {
m.pool = append(m.pool, t)
continue
}
i := t.inst
add := false
switch i.Op {
default:
panic("bad inst")
case syntax.InstMatch:
if len(t.cap) > 0 && (!longest || !m.matched || m.matchcap[1] < pos) {
t.cap[1] = pos
copy(m.matchcap, t.cap)
}
if !longest {
// First-match mode: cut off all lower-priority threads.
for _, d := range runq.dense[j+1:] {
if d.t != nil {
m.pool = append(m.pool, d.t)
}
}
runq.dense = runq.dense[:0]
}
m.matched = true
case syntax.InstRune:
add = i.MatchRune(c)
case syntax.InstRune1:
add = c == i.Rune[0]
case syntax.InstRuneAny:
add = true
case syntax.InstRuneAnyNotNL:
add = c != '\n'
}
if add {
t = m.add(nextq, i.Out, nextPos, t.cap, nextCond, t)
}
if t != nil {
m.pool = append(m.pool, t)
}
}
runq.dense = runq.dense[:0]
}
// add adds an entry to q for pc, unless the q already has such an entry.
// It also recursively adds an entry for all instructions reachable from pc by following
// empty-width conditions satisfied by cond. pos gives the current position
// in the input.
func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond *lazyFlag, t *thread) *thread {
Again:
if pc == 0 {
return t
}
if j := q.sparse[pc]; j < uint32(len(q.dense)) && q.dense[j].pc == pc {
return t
}
j := len(q.dense)
q.dense = q.dense[:j+1]
d := &q.dense[j]
d.t = nil
d.pc = pc
q.sparse[pc] = uint32(j)
i := &m.p.Inst[pc]
switch i.Op {
default:
panic("unhandled")
case syntax.InstFail:
// nothing
case syntax.InstAlt, syntax.InstAltMatch:
t = m.add(q, i.Out, pos, cap, cond, t)
pc = i.Arg
goto Again
case syntax.InstEmptyWidth:
if cond.match(syntax.EmptyOp(i.Arg)) {
pc = i.Out
goto Again
}
case syntax.InstNop:
pc = i.Out
goto Again
case syntax.InstCapture:
if int(i.Arg) < len(cap) {
opos := cap[i.Arg]
cap[i.Arg] = pos
m.add(q, i.Out, pos, cap, cond, nil)
cap[i.Arg] = opos
} else {
pc = i.Out
goto Again
}
case syntax.InstMatch, syntax.InstRune, syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL:
if t == nil {
t = m.alloc(i)
} else {
t.inst = i
}
if len(cap) > 0 && &t.cap[0] != &cap[0] {
copy(t.cap, cap)
}
d.t = t
t = nil
}
return t
}
type onePassMachine struct {
inputs inputs
matchcap []int
}
var onePassPool sync.Pool
func newOnePassMachine() *onePassMachine {
m, ok := onePassPool.Get().(*onePassMachine)
if !ok {
m = new(onePassMachine)
}
return m
}
func freeOnePassMachine(m *onePassMachine) {
m.inputs.clear()
onePassPool.Put(m)
}
// doOnePass implements r.doExecute using the one-pass execution engine.
func (re *Regexp) doOnePass(ir io.RuneReader, ib []byte, is string, pos, ncap int, dstCap []int) []int {
startCond := re.cond
if startCond == ^syntax.EmptyOp(0) { // impossible
return nil
}
m := newOnePassMachine()
if cap(m.matchcap) < ncap {
m.matchcap = make([]int, ncap)
} else {
m.matchcap = m.matchcap[:ncap]
}
matched := false
for i := range m.matchcap {
m.matchcap[i] = -1
}
i, _ := m.inputs.init(ir, ib, is)
r, r1 := endOfText, endOfText
width, width1 := 0, 0
r, width = i.step(pos)
if r != endOfText {
r1, width1 = i.step(pos + width)
}
var flag lazyFlag
if pos == 0 {
flag = newLazyFlag(-1, r)
} else {
flag = i.context(pos)
}
pc := re.onepass.Start
inst := &re.onepass.Inst[pc]
// If there is a simple literal prefix, skip over it.
if pos == 0 && flag.match(syntax.EmptyOp(inst.Arg)) &&
len(re.prefix) > 0 && i.canCheckPrefix() {
// Match requires literal prefix; fast search for it.
if !i.hasPrefix(re) {
goto Return
}
pos += len(re.prefix)
r, width = i.step(pos)
r1, width1 = i.step(pos + width)
flag = i.context(pos)
pc = int(re.prefixEnd)
}
for {
inst = &re.onepass.Inst[pc]
pc = int(inst.Out)
switch inst.Op {
default:
panic("bad inst")
case syntax.InstMatch:
matched = true
if len(m.matchcap) > 0 {
m.matchcap[0] = 0
m.matchcap[1] = pos
}
goto Return
case syntax.InstRune:
if !inst.MatchRune(r) {
goto Return
}
case syntax.InstRune1:
if r != inst.Rune[0] {
goto Return
}
case syntax.InstRuneAny:
// Nothing
case syntax.InstRuneAnyNotNL:
if r == '\n' {
goto Return
}
// peek at the input rune to see which branch of the Alt to take
case syntax.InstAlt, syntax.InstAltMatch:
pc = int(onePassNext(inst, r))
continue
case syntax.InstFail:
goto Return
case syntax.InstNop:
continue
case syntax.InstEmptyWidth:
if !flag.match(syntax.EmptyOp(inst.Arg)) {
goto Return
}
continue
case syntax.InstCapture:
if int(inst.Arg) < len(m.matchcap) {
m.matchcap[inst.Arg] = pos
}
continue
}
if width == 0 {
break
}
flag = newLazyFlag(r, r1)
pos += width
r, width = r1, width1
if r != endOfText {
r1, width1 = i.step(pos + width)
}
}
Return:
if !matched {
freeOnePassMachine(m)
return nil
}
dstCap = append(dstCap, m.matchcap...)
freeOnePassMachine(m)
return dstCap
}
// doMatch reports whether either r, b or s match the regexp.
func (re *Regexp) doMatch(r io.RuneReader, b []byte, s string) bool {
return re.doExecute(r, b, s, 0, 0, nil) != nil
}
// doExecute finds the leftmost match in the input, appends the position
// of its subexpressions to dstCap and returns dstCap.
//
// nil is returned if no matches are found and non-nil if matches are found.
func (re *Regexp) doExecute(r io.RuneReader, b []byte, s string, pos int, ncap int, dstCap []int) []int {
if dstCap == nil {
// Make sure 'return dstCap' is non-nil.
dstCap = arrayNoInts[:0:0]
}
if r == nil && len(b)+len(s) < re.minInputLen {
return nil
}
if re.onepass != nil {
return re.doOnePass(r, b, s, pos, ncap, dstCap)
}
if r == nil && len(b)+len(s) < re.maxBitStateLen {
return re.backtrack(b, s, pos, ncap, dstCap)
}
m := re.get()
i, _ := m.inputs.init(r, b, s)
m.init(ncap)
if !m.match(i, pos) {
re.put(m)
return nil
}
dstCap = append(dstCap, m.matchcap...)
re.put(m)
return dstCap
}
// arrayNoInts is returned by doExecute match if nil dstCap is passed
// to it with ncap=0.
var arrayNoInts [0]int

500
vendor/github.com/grafana/regexp/onepass.go generated vendored Normal file
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@ -0,0 +1,500 @@
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package regexp
import (
"regexp/syntax"
"slices"
"strings"
"unicode"
"unicode/utf8"
)
// "One-pass" regexp execution.
// Some regexps can be analyzed to determine that they never need
// backtracking: they are guaranteed to run in one pass over the string
// without bothering to save all the usual NFA state.
// Detect those and execute them more quickly.
// A onePassProg is a compiled one-pass regular expression program.
// It is the same as syntax.Prog except for the use of onePassInst.
type onePassProg struct {
Inst []onePassInst
Start int // index of start instruction
NumCap int // number of InstCapture insts in re
}
// A onePassInst is a single instruction in a one-pass regular expression program.
// It is the same as syntax.Inst except for the new 'Next' field.
type onePassInst struct {
syntax.Inst
Next []uint32
}
// onePassPrefix returns a literal string that all matches for the
// regexp must start with. Complete is true if the prefix
// is the entire match. Pc is the index of the last rune instruction
// in the string. The onePassPrefix skips over the mandatory
// EmptyBeginText.
func onePassPrefix(p *syntax.Prog) (prefix string, complete bool, pc uint32) {
i := &p.Inst[p.Start]
if i.Op != syntax.InstEmptyWidth || (syntax.EmptyOp(i.Arg))&syntax.EmptyBeginText == 0 {
return "", i.Op == syntax.InstMatch, uint32(p.Start)
}
pc = i.Out
i = &p.Inst[pc]
for i.Op == syntax.InstNop {
pc = i.Out
i = &p.Inst[pc]
}
// Avoid allocation of buffer if prefix is empty.
if iop(i) != syntax.InstRune || len(i.Rune) != 1 {
return "", i.Op == syntax.InstMatch, uint32(p.Start)
}
// Have prefix; gather characters.
var buf strings.Builder
for iop(i) == syntax.InstRune && len(i.Rune) == 1 && syntax.Flags(i.Arg)&syntax.FoldCase == 0 && i.Rune[0] != utf8.RuneError {
buf.WriteRune(i.Rune[0])
pc, i = i.Out, &p.Inst[i.Out]
}
if i.Op == syntax.InstEmptyWidth &&
syntax.EmptyOp(i.Arg)&syntax.EmptyEndText != 0 &&
p.Inst[i.Out].Op == syntax.InstMatch {
complete = true
}
return buf.String(), complete, pc
}
// onePassNext selects the next actionable state of the prog, based on the input character.
// It should only be called when i.Op == InstAlt or InstAltMatch, and from the one-pass machine.
// One of the alternates may ultimately lead without input to end of line. If the instruction
// is InstAltMatch the path to the InstMatch is in i.Out, the normal node in i.Next.
func onePassNext(i *onePassInst, r rune) uint32 {
next := i.MatchRunePos(r)
if next >= 0 {
return i.Next[next]
}
if i.Op == syntax.InstAltMatch {
return i.Out
}
return 0
}
func iop(i *syntax.Inst) syntax.InstOp {
op := i.Op
switch op {
case syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL:
op = syntax.InstRune
}
return op
}
// Sparse Array implementation is used as a queueOnePass.
type queueOnePass struct {
sparse []uint32
dense []uint32
size, nextIndex uint32
}
func (q *queueOnePass) empty() bool {
return q.nextIndex >= q.size
}
func (q *queueOnePass) next() (n uint32) {
n = q.dense[q.nextIndex]
q.nextIndex++
return
}
func (q *queueOnePass) clear() {
q.size = 0
q.nextIndex = 0
}
func (q *queueOnePass) contains(u uint32) bool {
if u >= uint32(len(q.sparse)) {
return false
}
return q.sparse[u] < q.size && q.dense[q.sparse[u]] == u
}
func (q *queueOnePass) insert(u uint32) {
if !q.contains(u) {
q.insertNew(u)
}
}
func (q *queueOnePass) insertNew(u uint32) {
if u >= uint32(len(q.sparse)) {
return
}
q.sparse[u] = q.size
q.dense[q.size] = u
q.size++
}
func newQueue(size int) (q *queueOnePass) {
return &queueOnePass{
sparse: make([]uint32, size),
dense: make([]uint32, size),
}
}
// mergeRuneSets merges two non-intersecting runesets, and returns the merged result,
// and a NextIp array. The idea is that if a rune matches the OnePassRunes at index
// i, NextIp[i/2] is the target. If the input sets intersect, an empty runeset and a
// NextIp array with the single element mergeFailed is returned.
// The code assumes that both inputs contain ordered and non-intersecting rune pairs.
const mergeFailed = uint32(0xffffffff)
var (
noRune = []rune{}
noNext = []uint32{mergeFailed}
)
func mergeRuneSets(leftRunes, rightRunes *[]rune, leftPC, rightPC uint32) ([]rune, []uint32) {
leftLen := len(*leftRunes)
rightLen := len(*rightRunes)
if leftLen&0x1 != 0 || rightLen&0x1 != 0 {
panic("mergeRuneSets odd length []rune")
}
var (
lx, rx int
)
merged := make([]rune, 0)
next := make([]uint32, 0)
ok := true
defer func() {
if !ok {
merged = nil
next = nil
}
}()
ix := -1
extend := func(newLow *int, newArray *[]rune, pc uint32) bool {
if ix > 0 && (*newArray)[*newLow] <= merged[ix] {
return false
}
merged = append(merged, (*newArray)[*newLow], (*newArray)[*newLow+1])
*newLow += 2
ix += 2
next = append(next, pc)
return true
}
for lx < leftLen || rx < rightLen {
switch {
case rx >= rightLen:
ok = extend(&lx, leftRunes, leftPC)
case lx >= leftLen:
ok = extend(&rx, rightRunes, rightPC)
case (*rightRunes)[rx] < (*leftRunes)[lx]:
ok = extend(&rx, rightRunes, rightPC)
default:
ok = extend(&lx, leftRunes, leftPC)
}
if !ok {
return noRune, noNext
}
}
return merged, next
}
// cleanupOnePass drops working memory, and restores certain shortcut instructions.
func cleanupOnePass(prog *onePassProg, original *syntax.Prog) {
for ix, instOriginal := range original.Inst {
switch instOriginal.Op {
case syntax.InstAlt, syntax.InstAltMatch, syntax.InstRune:
case syntax.InstCapture, syntax.InstEmptyWidth, syntax.InstNop, syntax.InstMatch, syntax.InstFail:
prog.Inst[ix].Next = nil
case syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL:
prog.Inst[ix].Next = nil
prog.Inst[ix] = onePassInst{Inst: instOriginal}
}
}
}
// onePassCopy creates a copy of the original Prog, as we'll be modifying it.
func onePassCopy(prog *syntax.Prog) *onePassProg {
p := &onePassProg{
Start: prog.Start,
NumCap: prog.NumCap,
Inst: make([]onePassInst, len(prog.Inst)),
}
for i, inst := range prog.Inst {
p.Inst[i] = onePassInst{Inst: inst}
}
// rewrites one or more common Prog constructs that enable some otherwise
// non-onepass Progs to be onepass. A:BD (for example) means an InstAlt at
// ip A, that points to ips B & C.
// A:BC + B:DA => A:BC + B:CD
// A:BC + B:DC => A:DC + B:DC
for pc := range p.Inst {
switch p.Inst[pc].Op {
default:
continue
case syntax.InstAlt, syntax.InstAltMatch:
// A:Bx + B:Ay
p_A_Other := &p.Inst[pc].Out
p_A_Alt := &p.Inst[pc].Arg
// make sure a target is another Alt
instAlt := p.Inst[*p_A_Alt]
if !(instAlt.Op == syntax.InstAlt || instAlt.Op == syntax.InstAltMatch) {
p_A_Alt, p_A_Other = p_A_Other, p_A_Alt
instAlt = p.Inst[*p_A_Alt]
if !(instAlt.Op == syntax.InstAlt || instAlt.Op == syntax.InstAltMatch) {
continue
}
}
instOther := p.Inst[*p_A_Other]
// Analyzing both legs pointing to Alts is for another day
if instOther.Op == syntax.InstAlt || instOther.Op == syntax.InstAltMatch {
// too complicated
continue
}
// simple empty transition loop
// A:BC + B:DA => A:BC + B:DC
p_B_Alt := &p.Inst[*p_A_Alt].Out
p_B_Other := &p.Inst[*p_A_Alt].Arg
patch := false
if instAlt.Out == uint32(pc) {
patch = true
} else if instAlt.Arg == uint32(pc) {
patch = true
p_B_Alt, p_B_Other = p_B_Other, p_B_Alt
}
if patch {
*p_B_Alt = *p_A_Other
}
// empty transition to common target
// A:BC + B:DC => A:DC + B:DC
if *p_A_Other == *p_B_Alt {
*p_A_Alt = *p_B_Other
}
}
}
return p
}
var anyRuneNotNL = []rune{0, '\n' - 1, '\n' + 1, unicode.MaxRune}
var anyRune = []rune{0, unicode.MaxRune}
// makeOnePass creates a onepass Prog, if possible. It is possible if at any alt,
// the match engine can always tell which branch to take. The routine may modify
// p if it is turned into a onepass Prog. If it isn't possible for this to be a
// onepass Prog, the Prog nil is returned. makeOnePass is recursive
// to the size of the Prog.
func makeOnePass(p *onePassProg) *onePassProg {
// If the machine is very long, it's not worth the time to check if we can use one pass.
if len(p.Inst) >= 1000 {
return nil
}
var (
instQueue = newQueue(len(p.Inst))
visitQueue = newQueue(len(p.Inst))
check func(uint32, []bool) bool
onePassRunes = make([][]rune, len(p.Inst))
)
// check that paths from Alt instructions are unambiguous, and rebuild the new
// program as a onepass program
check = func(pc uint32, m []bool) (ok bool) {
ok = true
inst := &p.Inst[pc]
if visitQueue.contains(pc) {
return
}
visitQueue.insert(pc)
switch inst.Op {
case syntax.InstAlt, syntax.InstAltMatch:
ok = check(inst.Out, m) && check(inst.Arg, m)
// check no-input paths to InstMatch
matchOut := m[inst.Out]
matchArg := m[inst.Arg]
if matchOut && matchArg {
ok = false
break
}
// Match on empty goes in inst.Out
if matchArg {
inst.Out, inst.Arg = inst.Arg, inst.Out
matchOut, matchArg = matchArg, matchOut
}
if matchOut {
m[pc] = true
inst.Op = syntax.InstAltMatch
}
// build a dispatch operator from the two legs of the alt.
onePassRunes[pc], inst.Next = mergeRuneSets(
&onePassRunes[inst.Out], &onePassRunes[inst.Arg], inst.Out, inst.Arg)
if len(inst.Next) > 0 && inst.Next[0] == mergeFailed {
ok = false
break
}
case syntax.InstCapture, syntax.InstNop:
ok = check(inst.Out, m)
m[pc] = m[inst.Out]
// pass matching runes back through these no-ops.
onePassRunes[pc] = append([]rune{}, onePassRunes[inst.Out]...)
inst.Next = make([]uint32, len(onePassRunes[pc])/2+1)
for i := range inst.Next {
inst.Next[i] = inst.Out
}
case syntax.InstEmptyWidth:
ok = check(inst.Out, m)
m[pc] = m[inst.Out]
onePassRunes[pc] = append([]rune{}, onePassRunes[inst.Out]...)
inst.Next = make([]uint32, len(onePassRunes[pc])/2+1)
for i := range inst.Next {
inst.Next[i] = inst.Out
}
case syntax.InstMatch, syntax.InstFail:
m[pc] = inst.Op == syntax.InstMatch
case syntax.InstRune:
m[pc] = false
if len(inst.Next) > 0 {
break
}
instQueue.insert(inst.Out)
if len(inst.Rune) == 0 {
onePassRunes[pc] = []rune{}
inst.Next = []uint32{inst.Out}
break
}
runes := make([]rune, 0)
if len(inst.Rune) == 1 && syntax.Flags(inst.Arg)&syntax.FoldCase != 0 {
r0 := inst.Rune[0]
runes = append(runes, r0, r0)
for r1 := unicode.SimpleFold(r0); r1 != r0; r1 = unicode.SimpleFold(r1) {
runes = append(runes, r1, r1)
}
slices.Sort(runes)
} else {
runes = append(runes, inst.Rune...)
}
onePassRunes[pc] = runes
inst.Next = make([]uint32, len(onePassRunes[pc])/2+1)
for i := range inst.Next {
inst.Next[i] = inst.Out
}
inst.Op = syntax.InstRune
case syntax.InstRune1:
m[pc] = false
if len(inst.Next) > 0 {
break
}
instQueue.insert(inst.Out)
runes := []rune{}
// expand case-folded runes
if syntax.Flags(inst.Arg)&syntax.FoldCase != 0 {
r0 := inst.Rune[0]
runes = append(runes, r0, r0)
for r1 := unicode.SimpleFold(r0); r1 != r0; r1 = unicode.SimpleFold(r1) {
runes = append(runes, r1, r1)
}
slices.Sort(runes)
} else {
runes = append(runes, inst.Rune[0], inst.Rune[0])
}
onePassRunes[pc] = runes
inst.Next = make([]uint32, len(onePassRunes[pc])/2+1)
for i := range inst.Next {
inst.Next[i] = inst.Out
}
inst.Op = syntax.InstRune
case syntax.InstRuneAny:
m[pc] = false
if len(inst.Next) > 0 {
break
}
instQueue.insert(inst.Out)
onePassRunes[pc] = append([]rune{}, anyRune...)
inst.Next = []uint32{inst.Out}
case syntax.InstRuneAnyNotNL:
m[pc] = false
if len(inst.Next) > 0 {
break
}
instQueue.insert(inst.Out)
onePassRunes[pc] = append([]rune{}, anyRuneNotNL...)
inst.Next = make([]uint32, len(onePassRunes[pc])/2+1)
for i := range inst.Next {
inst.Next[i] = inst.Out
}
}
return
}
instQueue.clear()
instQueue.insert(uint32(p.Start))
m := make([]bool, len(p.Inst))
for !instQueue.empty() {
visitQueue.clear()
pc := instQueue.next()
if !check(pc, m) {
p = nil
break
}
}
if p != nil {
for i := range p.Inst {
p.Inst[i].Rune = onePassRunes[i]
}
}
return p
}
// compileOnePass returns a new *syntax.Prog suitable for onePass execution if the original Prog
// can be recharacterized as a one-pass regexp program, or syntax.nil if the
// Prog cannot be converted. For a one pass prog, the fundamental condition that must
// be true is: at any InstAlt, there must be no ambiguity about what branch to take.
func compileOnePass(prog *syntax.Prog) (p *onePassProg) {
if prog.Start == 0 {
return nil
}
// onepass regexp is anchored
if prog.Inst[prog.Start].Op != syntax.InstEmptyWidth ||
syntax.EmptyOp(prog.Inst[prog.Start].Arg)&syntax.EmptyBeginText != syntax.EmptyBeginText {
return nil
}
// every instruction leading to InstMatch must be EmptyEndText
for _, inst := range prog.Inst {
opOut := prog.Inst[inst.Out].Op
switch inst.Op {
default:
if opOut == syntax.InstMatch {
return nil
}
case syntax.InstAlt, syntax.InstAltMatch:
if opOut == syntax.InstMatch || prog.Inst[inst.Arg].Op == syntax.InstMatch {
return nil
}
case syntax.InstEmptyWidth:
if opOut == syntax.InstMatch {
if syntax.EmptyOp(inst.Arg)&syntax.EmptyEndText == syntax.EmptyEndText {
continue
}
return nil
}
}
}
// Creates a slightly optimized copy of the original Prog
// that cleans up some Prog idioms that block valid onepass programs
p = onePassCopy(prog)
// checkAmbiguity on InstAlts, build onepass Prog if possible
p = makeOnePass(p)
if p != nil {
cleanupOnePass(p, prog)
}
return p
}

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vendor/github.com/grafana/regexp/regexp.go generated vendored Normal file
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