diff options
Diffstat (limited to 'vendor/modernc.org/libc/libc64.go')
-rw-r--r-- | vendor/modernc.org/libc/libc64.go | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/vendor/modernc.org/libc/libc64.go b/vendor/modernc.org/libc/libc64.go new file mode 100644 index 0000000..5460892 --- /dev/null +++ b/vendor/modernc.org/libc/libc64.go @@ -0,0 +1,79 @@ +// 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 +} |