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 * conmakehash.c
 * Create arrays for initializing the kernel folded tables (using a hash
 * table turned out to be to limiting...)  Unfortunately we can't simply
 * preinitialize the tables at compile time since kfree() cannot accept
 * memory not allocated by kmalloc(), and doing our own memory management
 * just for this seems like massive overkill.
 * Copyright (C) 1995-1997 H. Peter Anvin
 * This program is a part of the Linux kernel, and may be freely
 * copied under the terms of the GNU General Public License (GPL),
 * version 2, or at your option any later version.
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <string.h>
#include <ctype.h>
#define MAX_FONTLEN 256
typedef unsigned short unicode;
void usage(char *argv0)
  fprintf(stderr, "Usage: \n"
         "        %s chartable [hashsize] [hashstep] [maxhashlevel]\n", argv0);
  exit(EX_USAGE);
int getunicode(char **p0)
  char *p = *p0;
  while (*p == ' ' || *p == '\t')
  if (*p != 'U' || p[1] != '+' ||
      !isxdigit(p[2]) || !isxdigit(p[3]) || !isxdigit(p[4]) ||
      !isxdigit(p[5]) || isxdigit(p[6]))
    return -1;
  *p0 = p+6;
  return strtol(p+2,0,16);
unicode unitable[MAX_FONTLEN][255];
				/* Massive overkill, but who cares? */
int unicount[MAX_FONTLEN];
void addpair(int fp, int un)
  if ( un <= 0xfffe )
      /* Check it isn't a duplicate */
      for ( i = 0 ; i < unicount[fp] ; i++ )
	if ( unitable[fp][i] == un )
      /* Add to list */
      if ( unicount[fp] > 254 )
	  fprintf(stderr, "ERROR: Only 255 unicodes/glyph permitted!\n");
	  exit(EX_DATAERR);
      unitable[fp][unicount[fp]] = un;
      unicount[fp]++;
  /* otherwise: ignore */
int main(int argc, char *argv[])
  FILE *ctbl;
  char *tblname;
  char buffer[65536];
  int fontlen;
  int i, nuni, nent;
  int fp0, fp1, un0, un1;
  char *p, *p1;
  if ( argc < 2 || argc > 5 )
    usage(argv[0]);
  if ( !strcmp(argv[1],"-") )
      ctbl = stdin;
      tblname = "stdin";
      ctbl = fopen(tblname = argv[1], "r");
      if ( !ctbl )
	  perror(tblname);
	  exit(EX_NOINPUT);
  /* For now we assume the default font is always 256 characters. */    
  fontlen = 256;
  /* Initialize table */
  for ( i = 0 ; i < fontlen ; i++ )
    unicount[i] = 0;
  /* Now we come to the tricky part.  Parse the input table. */
  while ( fgets(buffer, sizeof(buffer), ctbl) != NULL )
      if ( (p = strchr(buffer, '\n')) != NULL )
	*p = '\0';
	fprintf(stderr, "%s: Warning: line too long\n", tblname);
      p = buffer;
 * Syntax accepted:
 *	<fontpos>	<unicode> <unicode> ...
 *	<range>		idem
 *	<range>		<unicode range>
 * where <range> ::= <fontpos>-<fontpos>
 * and <unicode> ::= U+<h><h><h><h>
 * and <h> ::= <hexadecimal digit>
      while (*p == ' ' || *p == '\t')
      if (!*p || *p == '#')
	continue;	/* skip comment or blank line */
      fp0 = strtol(p, &p1, 0);
      if (p1 == p)
	  fprintf(stderr, "Bad input line: %s\n", buffer);
	  exit(EX_DATAERR);
      p = p1;
      while (*p == ' ' || *p == '\t')
      if (*p == '-')
	  fp1 = strtol(p, &p1, 0);
	  if (p1 == p)
	      fprintf(stderr, "Bad input line: %s\n", buffer);
	      exit(EX_DATAERR);
      if ( fp0 < 0 || fp0 >= fontlen )
	    fprintf(stderr,
		    "%s: Glyph number (0x%x) larger than font length\n",
		    tblname, fp0);
	    exit(EX_DATAERR);
      if ( fp1 && (fp1 < fp0 || fp1 >= fontlen) )
	    fprintf(stderr,
		    "%s: Bad end of range (0x%x)\n",
		    tblname, fp1);
	    exit(EX_DATAERR);
      if (fp1)
	  /* we have a range; expect the word "idem" or a Unicode range of the
	     same length */
	  while (*p == ' ' || *p == '\t')
	  if (!strncmp(p, "idem", 4))
	      for (i=fp0; i<=fp1; i++)
		addpair(i,i);
	      p += 4;
	      un0 = getunicode(&p);
	      while (*p == ' ' || *p == '\t')
	      if (*p != '-')
		  fprintf(stderr,
"%s: Corresponding to a range of font positions, there should be a Unicode range\n",
			  tblname);
		  exit(EX_DATAERR);
	      p++;
	      un1 = getunicode(&p);
	      if (un0 < 0 || un1 < 0)
		  fprintf(stderr,
"%s: Bad Unicode range corresponding to font position range 0x%x-0x%x\n",
			  tblname, fp0, fp1);
		  exit(EX_DATAERR);
	      if (un1 - un0 != fp1 - fp0)
		  fprintf(stderr,
"%s: Unicode range U+%x-U+%x not of the same length as font position range 0x%x-0x%x\n",
			  tblname, un0, un1, fp0, fp1);
		  exit(EX_DATAERR);
	      for(i=fp0; i<=fp1; i++)
		addpair(i,un0-fp0+i);
	    /* no range; expect a list of unicode values for a single font position */
	    while ( (un0 = getunicode(&p)) >= 0 )
	      addpair(fp0, un0);
      while (*p == ' ' || *p == '\t')
      if (*p && *p != '#')
	fprintf(stderr, "%s: trailing junk (%s) ignored\n", tblname, p);
  /* Okay, we hit EOF, now output hash table */
  fclose(ctbl);
  /* Compute total size of Unicode list */
  nuni = 0;
  for ( i = 0 ; i < fontlen ; i++ )
    nuni += unicount[i];
  printf("\
 * Do not edit this file; it was automatically generated by\n\
 * conmakehash %s > [this file]\n\
#include <linux/types.h>\n\
u8 dfont_unicount[%d] = \n\
{\n\t", argv[1], fontlen);
  for ( i = 0 ; i < fontlen ; i++ )
      printf("%3d", unicount[i]);
      if ( i == fontlen-1 )
        printf("\n};\n");
      else if ( i % 8 == 7 )
        printf(",\n\t");
        printf(", ");
  printf("\nu16 dfont_unitable[%d] = \n{\n\t", nuni);
  nent = 0;
  for ( i = 0 ; i < nuni ; i++ )
      while ( nent >= unicount[fp0] )
	  nent = 0;
      printf("0x%04x", unitable[fp0][nent++]);
      if ( i == nuni-1 )
         printf("\n};\n");
       else if ( i % 8 == 7 )
         printf(",\n\t");
       else
         printf(", ");
  exit(EX_OK);
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