Find a UTF-8 glyph in your fonts

fc-search-point.c

/* fc-search-point.c: Search for a UTF-8 code point in the installed fonts
 *
 * Requires: fontconfig
 *
 * Build with:
 *
 * ```sh
 * $ cc \
 *      `pkg-config --cflags fontconfig` \
 *      -o fc-search-point fc-search-point.c \
 *      `pkg-config --libs fontconfig`
 *  ```
 *
 * Usage: `fc-search-point CHAR [CHAR...]`
 *
 * Released under the terms of the CC0
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fontconfig/fontconfig.h>

int
main (int   argc,
      char *argv[])
{
        if (argc < 2) {
                fprintf (stderr, "Usage: fc-search-point CHAR [CHAR...]\n");
                return EXIT_FAILURE;
        }

        FcObjectSet *os = FcObjectSetBuild (FC_CHARSET, FC_FILE, NULL);

        FcPattern *pat = FcPatternCreate ();

        FcFontSet *fs = FcFontList (0, pat, os);

        FcPatternDestroy (pat);
        FcObjectSetDestroy (os);

        for (int i = 0; i < fs->nfont; i++) {
                FcPattern *font_pat = fs->fonts[i];
                FcCharSet *cs;

                if (FcPatternGetCharSet (font_pat, FC_CHARSET, 0, &cs) != FcResultMatch)
                        continue;

                for (int j = 1; j < argc; j++) {
                        FcChar32 ch;

                        FcUtf8ToUcs4 ((FcChar8 *) argv[j], &ch, strlen (argv[j]));

                        if (FcCharSetHasChar (cs, ch)) {
                                fprintf (stdout, "UTF-8 code point '%s' found:\n", argv[j]);
                                FcPatternDel (font_pat, FC_CHARSET);
                                FcPatternDel (font_pat, FC_LANG);
                                FcPatternPrint (font_pat);
                        }
                }
        }

        FcFontSetDestroy (fs);

        FcFini ();

        return EXIT_SUCCESS;
}