gcc/testsuite/go.test/test/bench/regex-dna-parallel.go

   1 /*
   2 Redistribution and use in source and binary forms, with or without
   3 modification, are permitted provided that the following conditions are met:
   4
   5     * Redistributions of source code must retain the above copyright
   6     notice, this list of conditions and the following disclaimer.
   7
   8     * Redistributions in binary form must reproduce the above copyright
   9     notice, this list of conditions and the following disclaimer in the
  10     documentation and/or other materials provided with the distribution.
  11
  12     * Neither the name of "The Computer Language Benchmarks Game" nor the
  13     name of "The Computer Language Shootout Benchmarks" nor the names of
  14     its contributors may be used to endorse or promote products derived
  15     from this software without specific prior written permission.
  16
  17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20 ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27 POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30 /* The Computer Language Benchmarks Game
  31  * http://shootout.alioth.debian.org/
  32  *
  33  * contributed by The Go Authors.
  34  */
  35
  36 package main
  37
  38 import (
  39         "fmt"
  40         "io/ioutil"
  41         "os"
  42         "runtime"
  43         "regexp"
  44 )
  45
  46 var variants = []string{
  47         "agggtaaa|tttaccct",
  48         "[cgt]gggtaaa|tttaccc[acg]",
  49         "a[act]ggtaaa|tttacc[agt]t",
  50         "ag[act]gtaaa|tttac[agt]ct",
  51         "agg[act]taaa|ttta[agt]cct",
  52         "aggg[acg]aaa|ttt[cgt]ccct",
  53         "agggt[cgt]aa|tt[acg]accct",
  54         "agggta[cgt]a|t[acg]taccct",
  55         "agggtaa[cgt]|[acg]ttaccct",
  56 }
  57
  58 type Subst struct {
  59         pat, repl string
  60 }
  61
  62 var substs = []Subst{
  63         Subst{"B", "(c|g|t)"},
  64         Subst{"D", "(a|g|t)"},
  65         Subst{"H", "(a|c|t)"},
  66         Subst{"K", "(g|t)"},
  67         Subst{"M", "(a|c)"},
  68         Subst{"N", "(a|c|g|t)"},
  69         Subst{"R", "(a|g)"},
  70         Subst{"S", "(c|g)"},
  71         Subst{"V", "(a|c|g)"},
  72         Subst{"W", "(a|t)"},
  73         Subst{"Y", "(c|t)"},
  74 }
  75
  76 func countMatches(pat string, bytes []byte) int {
  77         re := regexp.MustCompile(pat)
  78         n := 0
  79         for {
  80                 e := re.FindIndex(bytes)
  81                 if e == nil {
  82                         break
  83                 }
  84                 n++
  85                 bytes = bytes[e[1]:]
  86         }
  87         return n
  88 }
  89
  90 func main() {
  91         runtime.GOMAXPROCS(4)
  92         bytes, err := ioutil.ReadFile("/dev/stdin")
  93         if err != nil {
  94                 fmt.Fprintf(os.Stderr, "can't read input: %s\n", err)
  95                 os.Exit(2)
  96         }
  97         ilen := len(bytes)
  98         // Delete the comment lines and newlines
  99         bytes = regexp.MustCompile("(>[^\n]+)?\n").ReplaceAll(bytes, []byte{})
 100         clen := len(bytes)
 101
 102         mresults := make([]chan int, len(variants))
 103         for i, s := range variants {
 104                 ch := make(chan int)
 105                 mresults[i] = ch
 106                 go func(ss string) {
 107                         ch <- countMatches(ss, bytes)
 108                 }(s)
 109         }
 110
 111         lenresult := make(chan int)
 112         bb := bytes
 113         go func() {
 114                 for _, sub := range substs {
 115                         bb = regexp.MustCompile(sub.pat).ReplaceAll(bb, []byte(sub.repl))
 116                 }
 117                 lenresult <- len(bb)
 118         }()
 119
 120         for i, s := range variants {
 121                 fmt.Printf("%s %d\n", s, <-mresults[i])
 122         }
 123         fmt.Printf("\n%d\n%d\n%d\n", ilen, clen, <-lenresult)
 124 }