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package lzcnt
import (
"embed"
"html/template"
"net/http"
"sync/atomic"
)
/*
#include <stdint.h>
extern unsigned long int log2lzcnt(unsigned long int);
*/
import "C"
var (
//go:embed templates
templates embed.FS
tmpl = template.New("")
)
func init() {
tmpl = tmpl.Funcs(template.FuncMap{
"arr": func(els ...any) []any {
return els
},
})
tmpl = template.Must(tmpl.ParseFS(templates, "templates/*.html"))
}
type Server struct {
mux *http.ServeMux
requestCounter atomic.Uint64
}
func New() *Server {
srv := &Server{
mux: http.NewServeMux(),
}
srv.mux.HandleFunc("/reset", func(w http.ResponseWriter, r *http.Request) {
srv.requestCounter.Store(0)
http.Redirect(w, r, "/", http.StatusSeeOther)
})
srv.mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
n := srv.requestCounter.Add(1)
payload := map[string]any{
"Page": "log2.s.html",
"Title": "Count the Number of Leading Zero Bits",
"Requests": n,
"Log2lzcnt": uint64(C.log2lzcnt(C.uint64_t(n))),
}
tmpl.ExecuteTemplate(w, "index.html", payload)
})
srv.mux.HandleFunc("/about", srv.aboutPage)
return srv
}
func (s *Server) ListenAndServe(host string) error {
return http.ListenAndServe(host, s.mux)
}
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