to_c-UnicodeData.c

/*
 * wlite: A 16-bit Unicode based tiny <wchar.h> library with CJK features
 * Copyright (C) 2022 Eido INOUE
 * 
 * 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 3 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 General Lesser Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "to_c.h"

char *get_field(const char *line, unsigned n) {
    const char *semi;
    char *field = NULL;
    size_t length;
    unsigned i;

    for (i = 0, semi = line; i < n; i++, semi++) {
        if ((semi = strchr(semi, ';')) == NULL) {
            fprintf(stderr, "can't get field #%u from '%s'\n", n, line);
            break;
        }
    }
    length = strcspn(semi, ";");
    if ((field = malloc(length + 1)) == NULL) {
        perror(NULL);
        exit(EXIT_FAILURE);
    }
    strncpy(field, semi, length);
    field[length] = '\0';
    return field;
}

int main(int argc, char **argv) {
    wlite_wc_t_ *wlite_punct = NULL; size_t punctn = 0;
    wlite_map_t_ *wlite_fixw = NULL; size_t fixw_n = 0;

    if (setlocale(LC_CTYPE, "") == NULL) {
        fputs("couldn't set locale for LC_CTYPE\n", stderr);
    }
    while (!feof(stdin)) {
        unsigned long codepoint, decomp;
        char line[512] = { 0 }, *comment, *field;

        if (fgets(line, sizeof(line), stdin) == NULL) {
            if (ferror(stdin)) {
                perror(NULL);
                exit(EXIT_FAILURE);
            }
            break;
        }
        if ((comment = strchr(line, '#')) != NULL) {
            strcpy(comment, "\n");
        }

        /* get character in question */

        if (sscanf(line, " %lX ;", &codepoint) != 1) continue;

        /* get character category */

        if ((field = get_field(line, 2)) != NULL) {
            if (field[0] == 'P') {
                fprintf(stderr, "adding punctuation U+%04lX\n", codepoint);
                add_wc((wchar_t) codepoint, &wlite_punct, &punctn);
            }
            free(field);
        }

        /* get character decomposition */

        if ((field = get_field(line, 5)) != NULL) {
            if (strstr(field, "<narrow>") != NULL) {
                if (sscanf(field, "<narrow> %lX ;", &decomp) != 1) {
                    fprintf(stderr, "can't scan field: %s", field);
                }
                else {
                    fprintf(stderr, "adding halfwidth U+%04lX -> U+%04lX\n",
                            codepoint, decomp);
                    add_map(codepoint, decomp, &wlite_fixw, &fixw_n);
                }
                   
            }
            free(field);
        }

        if ((field = get_field(line, 5)) != NULL) {
            if (strstr(field, "<wide>") != NULL) {
                if (sscanf(field, "<wide> %lX ;", &decomp) != 1) {
                    fprintf(stderr, "can't scan field: %s", field);
                }
                else {
                    fprintf(stderr, "adding fullwidth U+%04lX -> U+%04lX\n",
                            codepoint, decomp);
                    add_map(codepoint, decomp, &wlite_fixw, &fixw_n);
                }
                   
            }
            free(field);
        }

    }

    fprintf(stdout, "#include \"%s\"\n", "wlite_config.h");

    print_wcs(stdout, wlite_punct, WLITE_ID2STR_(wlite_punct), punctn);
    print_maps(stdout, wlite_fixw, WLITE_ID2STR_(wlite_fixw), fixw_n);

    return 0;
}