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glibc  2.9
Functions | Variables
tst-table-from.c File Reference
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iconv.h>
#include <errno.h>

Go to the source code of this file.

Functions

static const char * hexbuf (unsigned char buf[], unsigned int buflen)
static int try (iconv_t cd, unsigned char buf[], unsigned int buflen, unsigned char *out)
static const char * utf8_decode (const unsigned char *out, unsigned int outlen)
int main (int argc, char *argv[])

Variables

static int bmp_only

Function Documentation

static const char* hexbuf ( unsigned char  buf[],
unsigned int  buflen 
) [static]

Definition at line 36 of file tst-table-from.c.

{
  static char msg[50];

  switch (buflen)
    {
    case 1:
      sprintf (msg, "0x%02X", buf[0]);
      break;
    case 2:
      sprintf (msg, "0x%02X%02X", buf[0], buf[1]);
      break;
    case 3:
      sprintf (msg, "0x%02X%02X%02X", buf[0], buf[1], buf[2]);
      break;
    case 4:
      sprintf (msg, "0x%02X%02X%02X%02X", buf[0], buf[1], buf[2], buf[3]);
      break;
    default:
      abort ();
    }
  return msg;
}

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int main ( int  argc,
char *  argv[] 
)

Definition at line 179 of file tst-table-from.c.

{
  const char *charset;
  iconv_t cd;
  int search_depth;

  if (argc != 2)
    {
      fprintf (stderr, "Usage: tst-table-from charset\n");
      exit (1);
    }
  charset = argv[1];

  cd = iconv_open ("UTF-8", charset);
  if (cd == (iconv_t)(-1))
    {
      perror ("iconv_open");
      exit (1);
    }

  /* When testing UTF-8 or GB18030, stop at 0x10000, otherwise the output
     file gets too big.  */
  bmp_only = (strcmp (charset, "UTF-8") == 0
             || strcmp (charset, "GB18030") == 0);
  search_depth = (strcmp (charset, "UTF-8") == 0 ? 3 : 4);

  {
    unsigned char out[12];
    unsigned char buf[4];
    unsigned int i0, i1, i2, i3;
    int result;

    for (i0 = 0; i0 < 0x100; i0++)
      {
       buf[0] = i0;
       result = try (cd, buf, 1, out);
       if (result < 0)
         {
         }
       else if (result > 0)
         {
           const char *unicode = utf8_decode (out, result);
           if (unicode != NULL)
             printf ("0x%02X\t%s\n", i0, unicode);
         }
       else
         {
           for (i1 = 0; i1 < 0x100; i1++)
             {
              buf[1] = i1;
              result = try (cd, buf, 2, out);
              if (result < 0)
                {
                }
              else if (result > 0)
                {
                  const char *unicode = utf8_decode (out, result);
                  if (unicode != NULL)
                    printf ("0x%02X%02X\t%s\n", i0, i1, unicode);
                }
              else
                {
                  for (i2 = 0; i2 < 0x100; i2++)
                    {
                     buf[2] = i2;
                     result = try (cd, buf, 3, out);
                     if (result < 0)
                       {
                       }
                     else if (result > 0)
                       {
                         const char *unicode = utf8_decode (out, result);
                         if (unicode != NULL)
                           printf ("0x%02X%02X%02X\t%s\n",
                                  i0, i1, i2, unicode);
                       }
                     else if (search_depth > 3)
                       {
                         for (i3 = 0; i3 < 0x100; i3++)
                           {
                            buf[3] = i3;
                            result = try (cd, buf, 4, out);
                            if (result < 0)
                              {
                              }
                            else if (result > 0)
                              {
                                const char *unicode =
                                  utf8_decode (out, result);
                                if (unicode != NULL)
                                  printf ("0x%02X%02X%02X%02X\t%s\n",
                                         i0, i1, i2, i3, unicode);
                              }
                            else
                              {
                                fprintf (stderr,
                                        "%s: incomplete byte sequence\n",
                                        hexbuf (buf, 4));
                                exit (1);
                              }
                           }
                       }
                    }
                }
             }
         }
      }
  }

  if (iconv_close (cd) < 0)
    {
      perror ("iconv_close");
      exit (1);
    }

  if (ferror (stdin) || fflush (stdout) || ferror (stdout))
    {
      fprintf (stderr, "I/O error\n");
      exit (1);
    }

  return 0;
}

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static int try ( iconv_t  cd,
unsigned char  buf[],
unsigned int  buflen,
unsigned char *  out 
) [static]

Definition at line 64 of file tst-table-from.c.

{
  const char *inbuf = (const char *) buf;
  size_t inbytesleft = buflen;
  char *outbuf = (char *) out;
  size_t outbytesleft = 12;
  size_t result;

  iconv (cd, NULL, NULL, NULL, NULL);
  result = iconv (cd, (char **) &inbuf, &inbytesleft, &outbuf, &outbytesleft);
  if (result != (size_t)(-1))
    result = iconv (cd, NULL, NULL, &outbuf, &outbytesleft);

  if (result == (size_t)(-1))
    {
      if (errno == EILSEQ)
       {
         return -1;
       }
      else if (errno == EINVAL)
       {
         return 0;
       }
      else
       {
         int saved_errno = errno;
         fprintf (stderr, "%s: iconv error: ", hexbuf (buf, buflen));
         errno = saved_errno;
         perror ("");
         exit (1);
       }
    }
  else
    {
      if (inbytesleft != 0)
       {
         fprintf (stderr, "%s: inbytes = %ld, outbytes = %ld\n",
                 hexbuf (buf, buflen),
                 (long) (buflen - inbytesleft),
                 (long) (12 - outbytesleft));
         exit (1);
       }
      return 12 - outbytesleft;
    }
}

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static const char* utf8_decode ( const unsigned char *  out,
unsigned int  outlen 
) [static]

Definition at line 112 of file tst-table-from.c.

{
  static char hexbuf[84];
  char *p = hexbuf;

  while (outlen > 0)
    {
      if (p > hexbuf)
       *p++ = ' ';

      if (out[0] < 0x80)
       {
         sprintf (p, "0x%04X", out[0]);
         out += 1; outlen -= 1;
       }
      else if (out[0] >= 0xc0 && out[0] < 0xe0 && outlen >= 2)
       {
         sprintf (p, "0x%04X", ((out[0] & 0x1f) << 6) + (out[1] & 0x3f));
         out += 2; outlen -= 2;
       }
      else if (out[0] >= 0xe0 && out[0] < 0xf0 && outlen >= 3)
       {
         sprintf (p, "0x%04X", ((out[0] & 0x0f) << 12)
                            + ((out[1] & 0x3f) << 6) + (out[2] & 0x3f));
         out += 3; outlen -= 3;
       }
      else if (out[0] >= 0xf0 && out[0] < 0xf8 && outlen >= 4)
       {
         sprintf (p, "0x%04X", ((out[0] & 0x07) << 18)
                            + ((out[1] & 0x3f) << 12)
                            + ((out[2] & 0x3f) << 6) + (out[3] & 0x3f));
         out += 4; outlen -= 4;
       }
      else if (out[0] >= 0xf8 && out[0] < 0xfc && outlen >= 5)
       {
         sprintf (p, "0x%04X", ((out[0] & 0x03) << 24)
                            + ((out[1] & 0x3f) << 18)
                            + ((out[2] & 0x3f) << 12)
                            + ((out[3] & 0x3f) << 6) + (out[4] & 0x3f));
         out += 5; outlen -= 5;
       }
      else if (out[0] >= 0xfc && out[0] < 0xfe && outlen >= 6)
       {
         sprintf (p, "0x%04X", ((out[0] & 0x01) << 30)
                            + ((out[1] & 0x3f) << 24)
                            + ((out[2] & 0x3f) << 18)
                            + ((out[3] & 0x3f) << 12)
                            + ((out[4] & 0x3f) << 6) + (out[5] & 0x3f));
         out += 6; outlen -= 6;
       }
      else
       {
         sprintf (p, "0x????");
         out += 1; outlen -= 1;
       }

      if (bmp_only && strlen (p) > 6)
       /* Ignore conversions outside Unicode plane 0.  */
       return NULL;

      p += strlen (p);
    }

  return hexbuf;
}

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Variable Documentation

int bmp_only [static]

Definition at line 32 of file tst-table-from.c.