lib/genflags.c

/* Copyright (C) 2000-2002, 2005-2006, 2008-2009, 2016, 2022 Free Software Foundation, Inc.
   This file is part of the GNU LIBICONV Library.

   The GNU LIBICONV Library 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.

   The GNU LIBICONV Library 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 the GNU LIBICONV Library; see the file COPYING.LIB.
   If not, see <https://www.gnu.org/licenses/>.  */

/* Creates the flags.h include file. */

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* Avoid lots of warnings from "gcc -Wall". */
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 2) || __GNUC__ > 4
# pragma GCC diagnostic ignored "-Wunused-function"
#endif

/* Consider all encodings, including the system dependent ones. */
#define USE_AIX
#define USE_OSF1
#define USE_DOS
#define USE_ZOS
#define USE_EXTRA

struct loop_funcs {};
struct iconv_fallbacks {};
struct iconv_hooks {};
#include "converters.h"

static void emit_encoding (struct wctomb_funcs * ofuncs, const char* c_name)
{
  /* Prepare a converter struct. */
  struct conv_struct conv;
  memset(&conv,'\0',sizeof(conv));
  conv.ofuncs = *ofuncs;

  {
    /* See whether the encoding can encode the accents and quotation marks. */
    ucs4_t probe[6] = { 0x0060, 0x00b4, 0x2018, 0x2019, 0x3131, 0x3163, };
    int res[6];
    int i;
    for (i = 0; i < 6; i++) {
      unsigned char buf[10];
      memset(&conv.ostate,'\0',sizeof(state_t));
      res[i] = (conv.ofuncs.xxx_wctomb(&conv,buf,probe[i],sizeof(buf)) != RET_ILUNI);
    }
    printf("#define ei_%s_oflags (",c_name);
    {
      int first = 1;
      if (res[0] && res[1]) {
        printf("HAVE_ACCENTS");
        first = 0;
      }
      if (res[2] && res[3]) {
        if (!first) printf(" | ");
        printf("HAVE_QUOTATION_MARKS");
        first = 0;
      }
      if (res[4] && res[5]) {
        if (!first) printf(" | ");
        printf("HAVE_HANGUL_JAMO");
        first = 0;
      }
      if (first) printf("0");
    }
    printf(")\n");
  }
}

int main ()
{
  int bitmask = 1;
  printf("/* Generated automatically by genflags. */\n");
  printf("\n");
  printf("/* Set if the encoding can encode\n");
  printf("   the acute and grave accents U+00B4 and U+0060. */\n");
  printf("#define HAVE_ACCENTS %d\n",bitmask);
  printf("\n");
  bitmask = bitmask << 1;
  printf("/* Set if the encoding can encode\n");
  printf("   the single quotation marks U+2018 and U+2019. */\n");
  printf("#define HAVE_QUOTATION_MARKS %d\n",bitmask);
  printf("\n");
  bitmask = bitmask << 1;
  printf("/* Set if the encoding can encode\n");
  printf("   the double-width Hangul letters (Jamo) U+3131 to U+3163. */\n");
  printf("#define HAVE_HANGUL_JAMO %d\n",bitmask);
  printf("\n");

#define DEFENCODING(xxx_names,xxx,xxx_ifuncs1,xxx_ifuncs2,xxx_ofuncs1,xxx_ofuncs2) \
  {                                                       \
    struct wctomb_funcs ofuncs = xxx_ofuncs1,xxx_ofuncs2; \
    emit_encoding(&ofuncs,#xxx);                          \
  }
#define DEFALIAS(xxx_alias,xxx) /* nothing */
/* Consider all encodings, including the system dependent ones. */
#include "encodings.def"
#include "encodings_aix.def"
#include "encodings_osf1.def"
#include "encodings_dos.def"
#include "encodings_zos.def"
#include "encodings_extra.def"
#undef DEFALIAS
#undef DEFENCODING

  if (ferror(stdout) || fclose(stdout))
    exit(1);
  exit(0);
}