/* $OpenBSD: make_keys.c,v 1.10 2023/10/17 09:52:09 nicm Exp $ */

/****************************************************************************
 * Copyright 2020,2021 Thomas E. Dickey                                     *
 * Copyright 1998-2011,2015 Free Software Foundation, Inc.                  *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Thomas E. Dickey                    1997-on                     *
 ****************************************************************************/

/*
 * This replaces an awk script which translated keys.list into keys.tries by
 * making the output show the indices into the TERMTYPE Strings array.  Doing
 * it that way lets us cut down on the size of the init_keytry() function.
 */

#define USE_TERMLIB 1
#include <build.priv.h>

MODULE_ID("$Id: make_keys.c,v 1.10 2023/10/17 09:52:09 nicm Exp $")

#include <names.c>

static unsigned
unknown(void)
{
    static unsigned result = 0;

    if (result == 0) {
        unsigned n;
        for (n = 0; strnames[n] != 0; n++) {
            ++result;
        }
        for (n = 0; strfnames[n] != 0; n++) {
            ++result;
        }
    }
    return result;
}

static unsigned
lookup(const char *name)
{
    unsigned n;
    bool found = FALSE;
    for (n = 0; strnames[n] != 0; n++) {
        if (!strcmp(name, strnames[n])) {
            found = TRUE;
            break;
        }
    }
    if (!found) {
        for (n = 0; strfnames[n] != 0; n++) {
            if (!strcmp(name, strfnames[n])) {
                found = TRUE;
                break;
            }
        }
    }
    return found ? n : unknown();
}

static void
make_keys(FILE *ifp, FILE *ofp)
{
    char buffer[BUFSIZ];
    char from[256];
    char to[256];
    unsigned ignore = unknown();
    unsigned maxlen = 16;
    int scanned;

    while (fgets(buffer, (int) sizeof(buffer), ifp) != 0) {
        if (*buffer == '#')
            continue;

        to[sizeof(to) - 1] = '\0';
        from[sizeof(from) - 1] = '\0';

        scanned = sscanf(buffer, "%255s %255s", to, from);
        if (scanned == 2) {
            unsigned code = lookup(from);
            if (code == ignore)
                continue;
            if (strlen(from) > maxlen)
                maxlen = (unsigned) strlen(from);
            fprintf(ofp, "\t{ %4u, %-*.*s },\t/* %s */\n",
                    code,
                    (int) maxlen, (int) maxlen,
                    to,
                    from);
        }
    }
}

static void
write_list(FILE *ofp, const char **list)
{
    while (*list != 0)
        fprintf(ofp, "%s\n", *list++);
}

int
main(int argc, char *argv[])
{
    static const char *prefix[] =
    {
        "#ifndef _INIT_KEYTRY_H",
        "#define _INIT_KEYTRY_H 1",
        "",
        "/* This file was generated by MAKE_KEYS */",
        "",
        "#include <tic.h>",
        "",
        "#if BROKEN_LINKER",
        "static",
        "#endif",
        "const struct tinfo_fkeys _nc_tinfo_fkeys[] = {",
        0
    };
    static const char *suffix[] =
    {
        "\t{ 0, 0} };",
        "",
        "#endif /* _INIT_KEYTRY_H */",
        0
    };

    write_list(stdout, prefix);
    if (argc > 1) {
        int n;
        for (n = 1; n < argc; n++) {
            FILE *fp = fopen(argv[n], "r");
            if (fp != 0) {
                make_keys(fp, stdout);
                fclose(fp);
            }
        }
    } else {
        make_keys(stdin, stdout);
    }
    write_list(stdout, suffix);
    return EXIT_SUCCESS;
}