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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/go.test/test/turing.go | |
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Diffstat (limited to 'gcc/testsuite/go.test/test/turing.go')
-rw-r--r-- | gcc/testsuite/go.test/test/turing.go | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gcc/testsuite/go.test/test/turing.go b/gcc/testsuite/go.test/test/turing.go new file mode 100644 index 000000000..0af39de8b --- /dev/null +++ b/gcc/testsuite/go.test/test/turing.go @@ -0,0 +1,52 @@ +// $G $F.go && $L $F.$A && ./$A.out + +// Copyright 2009 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 main + +// brainfuck + +var p, pc int +var a [30000]byte +const prog = "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.!" + +func scan(dir int) { + for nest := dir; dir*nest > 0; pc += dir { + switch prog[pc+dir] { + case ']': + nest-- + case '[': + nest++ + } + } +} + +func main() { + for { + switch prog[pc] { + case '>': + p++ + case '<': + p-- + case '+': + a[p]++ + case '-': + a[p]-- + case '.': + print(string(a[p])) + case '[': + if a[p] == 0 { + scan(1) + } + case ']': + if a[p] != 0 { + scan(-1) + } + default: + return + } + pc++ + } +} |