main.go

package main

import (
	"archive/zip"
	"bufio"
	"fmt"
	"io"
	"log"
	"os"
	"sort"
	"strings"
)

type lang struct {
	name, url string
}

var langs = [...]lang{
	{"cs", "https://msdn.microsoft.com/en-us/library/x53a06bb.aspx"},
	{"cpp", "http://en.cppreference.com/w/cpp/keyword"},
	{"go", "https://golang.org/ref/spec#Keywords"},
	{"java", "https://docs.oracle.com/javase/tutorial/java/nutsandbolts/_keywords.html"},
	{"js", "http://www.w3schools.com/js/js_reserved.asp"},
	{"php", "https://secure.php.net/manual/en/reserved.keywords.php"},
	{"python", "https://docs.python.org/2.5/ref/keywords.html"},
}

func main() {

	file, err := os.Open("keywords.zip")
	if err != nil {
		log.Fatalln(err)
	}
	defer file.Close()

	stat, err := file.Stat()
	if err != nil {
		log.Fatalln(err)
	}

	r, err := zip.NewReader(file, stat.Size())
	if err != nil {
		log.Fatalln(err)
	}

	keywords := make(map[lang][]string)
	for i, f := range r.File {
		zf, err := f.Open()
		if err != nil {
			log.Fatalln(err)
		}
		if err := readLines(langs[i], zf, keywords); err != nil {
			log.Fatalln(err)
		}
		sort.Strings(keywords[langs[i]])
		zf.Close()
	}

	fmt.Println(`#include <stdbool.h>
#include <string.h>

static bool contains(const char* const* kws, const char* name) {
	while(*++kws) {
		if (strcmp(*kws, name) == 0) {
			return true;
		}
	}
	return false;
}
`)

	for lang, kws := range keywords {
		print(lang, kws)
	}
}

func readLines(lang lang, zf io.ReadCloser, m map[lang][]string) error {
	r := bufio.NewScanner(zf)
	var kw []string
	for r.Scan() {
		kw = append(kw, strings.TrimSpace(r.Text()))
	}
	m[lang] = kw
	return r.Err()
}

func print(lang lang, m []string) {

	fmt.Println("//" + lang.url)
	fmt.Print("static const char* const ")
	fmt.Print(lang.name)
	fmt.Println("_identifiers[] = {")

	ctr, _ := fmt.Print(`"` + m[0] + `"`)
	if len(m) > 1 {
		for _, k := range m[1:] {
			n, _ := fmt.Print(`, "` + k + `"`)
			ctr += n
			if ctr >= 79 {
				fmt.Print("\n")
				ctr = 0
			}
		}
	}

	fmt.Println("\n};")
}