Font copyright reader

copyright_reader_freetype2.c

#include <stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include <freetype/ftsnames.h>

int main (int argc, const char *argv[]) {
  if (argc != 2) return -1;

  FT_Library lib;
  memset(&lib, 0, sizeof lib);
 
  if (FT_Init_FreeType(&lib) != 0) return -1;
 
  FT_Face face;
  memset(&face, 0, sizeof face);

  fprintf(stderr, "reading the font %s...\n", argv[1]);
  if (FT_New_Face(lib, argv[1], 0, &face) != 0) return -1;
  fprintf(stderr, "done.\n");

  #define COPYRIGHT_NOTICE 0U
  #define LICENSE_DESCRIPTION 13U
  #define LICENSE_URL 14U

  unsigned int indices[] = {COPYRIGHT_NOTICE, LICENSE_DESCRIPTION, LICENSE_URL};
  FT_SfntName name;
  for (int i = 0; i < (sizeof indices/sizeof(unsigned int)); i++) {
    memset(&name, 0, sizeof name);
    fprintf(stderr, "reading the table %u...\n", indices[i]);
    if (FT_Get_Sfnt_Name(face, indices[i], &name) != 0) {
      fprintf(stderr, "failed. (empty?)\n");
      continue;
    }
    fprintf(stderr, "done.\n");
    printf ("name table %u of size %u\n%.*s\n\n", indices[i], name.string_len, (int)name.string_len, name.string);
    if (FT_Done_Face(face) != 0) return -1;
  }

  if (FT_Done_FreeType(lib) != 0) return -1;

  return 0;
}