icuSources/tools/makeconv/genmbcs.h

   1 /*
   2 *******************************************************************************
   3 *
   4 *   Copyright (C) 2000-2003, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 *******************************************************************************
   8 *   file name:  genmbcs.h
   9 *   encoding:   US-ASCII
  10 *   tab size:   8 (not used)
  11 *   indentation:4
  12 *
  13 *   created on: 2000jul10
  14 *   created by: Markus W. Scherer
  15 */
  16
  17 #ifndef __GENMBCS_H__
  18 #define __GENMBCS_H__
  19
  20 #include "makeconv.h"
  21
  22 enum {
  23     MBCS_STAGE_2_BLOCK_SIZE=0x40, /* 64; 64=1<<6 for 6 bits in stage 2 */
  24     MBCS_STAGE_2_BLOCK_SIZE_SHIFT=6, /* log2(MBCS_STAGE_2_BLOCK_SIZE) */
  25     MBCS_STAGE_1_SIZE=0x440, /* 0x110000>>10, or 17*64 for one entry per 1k code points */
  26     MBCS_STAGE_2_SIZE=0xfbc0, /* 0x10000-MBCS_STAGE_1_SIZE */
  27     MBCS_MAX_STAGE_2_TOP=MBCS_STAGE_2_SIZE,
  28     MBCS_STAGE_2_MAX_BLOCKS=MBCS_STAGE_2_SIZE>>MBCS_STAGE_2_BLOCK_SIZE_SHIFT,
  29
  30     MBCS_STAGE_2_ALL_UNASSIGNED_INDEX=0, /* stage 1 entry for the all-unassigned stage 2 block */
  31     MBCS_STAGE_2_FIRST_ASSIGNED=MBCS_STAGE_2_BLOCK_SIZE, /* start of the first stage 2 block after the all-unassigned one */
  32
  33     MBCS_STAGE_3_BLOCK_SIZE=16, /* 16; 16=1<<4 for 4 bits in stage 3 */
  34     MBCS_STAGE_3_FIRST_ASSIGNED=MBCS_STAGE_3_BLOCK_SIZE, /* start of the first stage 3 block after the all-unassigned one */
  35
  36     MBCS_MAX_FALLBACK_COUNT=8192
  37 };
  38
  39 U_CFUNC NewConverter *
  40 MBCSOpen(UCMFile *ucm);
  41
  42 U_CFUNC NewConverter *
  43 CnvExtOpen(UCMFile *ucm);
  44
  45 #endif