Logo Search packages:      
Sourcecode: w3m version File versions  Download package

big5.c

#include "wc.h"
#include "big5.h"
#include "search.h"
#include "wtf.h"
#ifdef USE_UNICODE
#include "ucs.h"
#endif

#define C0 WC_BIG5_MAP_C0
#define GL WC_BIG5_MAP_GL
#define C1 WC_BIG5_MAP_C1
#define LB WC_BIG5_MAP_LB
#define UB WC_BIG5_MAP_UB

wc_uint8 WC_BIG5_MAP[ 0x100 ] = {
    C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0,
    C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0, C0,
    GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL,
    GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL, GL,
    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB,
    LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, LB, C0,

    C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
    C1, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB,
    UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, UB, C1,
};

wc_wchar_t
wc_big5_to_cs94w(wc_wchar_t cc)
{
    cc.code = WC_BIG5_N(cc.code);
    if (cc.code < WC_C_BIG5_2_BASE)
      cc.ccs = WC_CCS_BIG5_1;
    else {
      cc.ccs = WC_CCS_BIG5_2;
      cc.code -= WC_C_BIG5_2_BASE;
    }
    cc.code = WC_N_CS94W(cc.code);
    return cc;
}

wc_wchar_t
wc_cs94w_to_big5(wc_wchar_t cc)
{
    cc.code = WC_CS94W_N(cc.code);
    if (cc.ccs == WC_CCS_BIG5_2)
      cc.code += WC_C_BIG5_2_BASE;
    cc.code = WC_N_BIG5(cc.code);
    cc.ccs = WC_CCS_BIG5;
    return cc;
}

Str
wc_conv_from_big5(Str is, wc_ces ces)
{
    Str os;
    wc_uchar *sp = (wc_uchar *)is->ptr;
    wc_uchar *ep = sp + is->length;
    wc_uchar *p;
    int state = WC_BIG5_NOSTATE;

    for (p = sp; p < ep && *p < 0x80; p++) 
      ;
    if (p == ep)
      return is;
    os = Strnew_size(is->length);
    if (p > sp)
      Strcat_charp_n(os, (char *)is->ptr, (int)(p - sp));

    for (; p < ep; p++) {
      switch (state) {
      case WC_BIG5_NOSTATE:
          switch (WC_BIG5_MAP[*p]) {
          case UB:
            state = WC_BIG5_MBYTE1;
            break;
          case C1:
            wtf_push_unknown(os, p, 1);
            break;
          default:
            Strcat_char(os, (char)*p);
            break;
          }
          break;
      case WC_BIG5_MBYTE1:
          if (WC_BIG5_MAP[*p] & LB)
            wtf_push(os, WC_CCS_BIG5, ((wc_uint32)*(p-1) << 8) | *p);
          else
            wtf_push_unknown(os, p-1, 2);
          state = WC_BIG5_NOSTATE;
          break;
      }
    }
    switch (state) {
    case WC_BIG5_MBYTE1:
      wtf_push_unknown(os, p-1, 1);
      break;
    }
    return os;
}

void
wc_push_to_big5(Str os, wc_wchar_t cc, wc_status *st)
{
  while (1) {
    switch (cc.ccs) {
    case WC_CCS_US_ASCII:
      Strcat_char(os, (char)cc.code);
      return;
    case WC_CCS_BIG5_1:
    case WC_CCS_BIG5_2:
      cc = wc_cs94w_to_big5(cc);
    case WC_CCS_BIG5:
      Strcat_char(os, (char)(cc.code >> 8));
      Strcat_char(os, (char)(cc.code & 0xff));
      return;
    case WC_CCS_UNKNOWN_W:
      if (!WcOption.no_replace)
          Strcat_charp(os, WC_REPLACE_W);
      return;
    case WC_CCS_UNKNOWN:
      if (!WcOption.no_replace)
          Strcat_charp(os, WC_REPLACE);
      return;
    default:
#ifdef USE_UNICODE
      if (WcOption.ucs_conv)
          cc = wc_any_to_any_ces(cc, st);
      else
#endif
          cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
      continue;
    }
  }
}

Str
wc_char_conv_from_big5(wc_uchar c, wc_status *st)
{
    static Str os;
    static wc_uchar big5u;

    if (st->state == -1) {
      st->state = WC_BIG5_NOSTATE;
      os = Strnew_size(8);
    }

    switch (st->state) {
    case WC_BIG5_NOSTATE:
      switch (WC_BIG5_MAP[c]) {
      case UB:
          big5u = c;
          st->state = WC_BIG5_MBYTE1;
          return NULL;
      case C1:
          break;
      default:
          Strcat_char(os, (char)c);
          break;
      }
      break;
    case WC_BIG5_MBYTE1:
      if (WC_BIG5_MAP[c] & LB)
          wtf_push(os, WC_CCS_BIG5, ((wc_uint32)big5u << 8) | c);
      break;
    }
    st->state = -1;
    return os;
}

Generated by  Doxygen 1.6.0   Back to index