/*
 * @file keysym.c
 * @brief Code generator for X11 key definitions (X11/keysymdef.h)
 */
/*****************************************************************************
 * Copyright © 2009 Rémi Denis-Courmont
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#define _GNU_SOURCE 1
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <limits.h>
#include <search.h>
#include <assert.h>

struct keysym
{
    char xname[32];
    char uname[64];
    int32_t xsym;
    int32_t usym;
};

static int cmpkey (const void *va, const void *vb)
{
    const struct keysym *ka = va, *kb = vb;

#if (INT_MAX < 0x7fffffff)
# error Oups!
#endif
    return ka->xsym - kb->xsym;
}

static void printkey (const void *node, const VISIT which, const int depth)
{
    if (which != postorder && which != leaf)
        return;

    const struct keysym *const *psym = node, *sym = *psym;

#if 1
    if (sym->xsym <= 0xff) /* Latin-1 */
        return;
    if (sym->xsym >= 0x1000100 && sym->xsym <= 0x110ffff) /* Unicode */
        return;
#endif
    printf ("/* XK_%-20s: %s*/\n", sym->xname, sym->uname);
    printf ("{ 0x%08"PRIx32", 0x%04"PRIx32" },\n", sym->xsym, sym->usym);
        
    (void) depth;
}

static int parse (FILE *in)
{
    void *root = NULL;
    char *line = NULL;
    size_t buflen = 0;
    ssize_t len;

    while ((len = getline (&line, &buflen, in)) != -1)
    {
        struct keysym *sym = malloc (sizeof (*sym));
        if (sym == NULL)
            abort ();

        int val = sscanf (line,
                          "#define XK_%31s %"SCNi32" /*%*cU+%"SCNx32" %63[^*]",
                          sym->xname, &sym->xsym, &sym->usym, sym->uname);
        if (val < 3)
        {
            free (sym);
            continue;
        }
        if (val < 4)
            sym->uname[0] = '\0';

        struct keysym **psym = tsearch (sym, &root, cmpkey);
        if (psym == NULL)
            abort ();
        if (*psym != sym)
            free (sym); /* Duplicate entry */
    }
    free (line);

    puts ("/* This file is generated automatically. Do not edit! */");
    puts ("/* Entries are sorted from the smallest to the largest XK */");
    twalk (root, printkey);
    tdestroy (root, free);

    if (ferror (in))
    {
        perror ("Read error");
        return 1;
    }

    return 0;
}

int main (void)
{
    return -parse (stdin);
}
