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// Copyright 2020 The Libc Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build ((amd64 || arm64 || loong64) && !linux) || ppc64le || riscv64 || s390x || mips64le
package libc // import "modernc.org/libc"
import (
"unsafe"
"modernc.org/libc/limits"
"modernc.org/libc/sys/types"
)
const (
heapSize = 2 << 30 // Adjust for your debugging session requirements and system RAM size.
)
type (
// RawMem represents the biggest byte array the runtime can handle
RawMem [1<<50 - 1]byte
// 48-5*8 = 8 bytes left to pad
stackHeaderPadding struct {
a uintptr
}
)
type bits []int
func newBits(n int) (r bits) { return make(bits, (n+63)>>6) }
func (b bits) has(n int) bool { return b != nil && b[n>>6]&(1<<uint(n&63)) != 0 }
func (b bits) set(n int) { b[n>>6] |= 1 << uint(n&63) }
func Xstrchrnul(tls *TLS, s uintptr, c int32) (r uintptr) {
if __ccgo_strace {
trc("tls=%v s=%v c=%v, (%v:)", tls, s, c, origin(2))
defer func() { trc("-> %v", r) }()
}
var k types.Size_t
var w uintptr
_, _ = k, w
c = int32(uint8(uint8(c)))
if !(c != 0) {
return s + uintptr(Xstrlen(tls, s))
}
for {
if !(uint64(uint64(s))%Uint64FromInt64(8) != 0) {
break
}
if !(*(*int8)(unsafe.Pointer(s)) != 0) || int32(*(*uint8)(unsafe.Pointer(s))) == c {
return s
}
goto _1
_1:
s++
}
k = uint64(-Int32FromInt32(1)) / Uint64FromInt32(limits.UCHAR_MAX) * uint64(uint64(c))
w = s
for {
if !(!((*(*uint64)(unsafe.Pointer(w))-uint64(-Int32FromInt32(1))/Uint64FromInt32(limits.UCHAR_MAX)) & ^*(*uint64)(unsafe.Pointer(w)) & (uint64(-Int32FromInt32(1))/Uint64FromInt32(limits.UCHAR_MAX)*uint64(Int32FromInt32(limits.UCHAR_MAX)/Int32FromInt32(2)+Int32FromInt32(1))) != 0) && !((*(*uint64)(unsafe.Pointer(w))^k-uint64(-Int32FromInt32(1))/Uint64FromInt32(limits.UCHAR_MAX)) & ^(*(*uint64)(unsafe.Pointer(w))^k) & (uint64(-Int32FromInt32(1))/Uint64FromInt32(limits.UCHAR_MAX)*uint64(Int32FromInt32(limits.UCHAR_MAX)/Int32FromInt32(2)+Int32FromInt32(1))) != 0)) {
break
}
goto _2
_2:
w += 8
}
s = w
for {
if !(*(*int8)(unsafe.Pointer(s)) != 0 && int32(*(*uint8)(unsafe.Pointer(s))) != c) {
break
}
goto _3
_3:
s++
}
return s
}
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