mdw@git.distorted.org.uk Git - sgt/putty/blob - mac/macucs.c

   1 /* $Id: macucs.c,v 1.5 2003/01/14 19:57:36 ben Exp $ */
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <ctype.h>
   6
   7 #include <time.h>
   8 #include "putty.h"
   9 #include "terminal.h"
  10 #include "misc.h"
  11 #include "mac.h"
  12
  13 /*
  14  * Mac Unicode-handling routines.
  15  *
  16  * FIXME: currently trivial stub versions assuming all codepages
  17  * are ISO8859-1.
  18  *
  19  * What we _should_ do is to use the Text Encoding Conversion Manager
  20  * when it's available, and have our own routines for converting to
  21  * standard Mac OS scripts when it's not.  Support for ATSUI might be
  22  * nice, too.
  23  */
  24
  25 /*
  26  * Determine whether a byte is the first byte of a double-byte
  27  * character in a system character set.  Only MI use is by clipme()
  28  * when copying direct-to-font text to the clipboard.
  29  */
  30 int is_dbcs_leadbyte(int codepage, char byte)
  31 {
  32     return 0;                          /* we don't do DBCS */
  33 }
  34
  35 /*
  36  * Convert from Unicode to a system character set.  MI uses are:
  37  * (1) by lpage_send(), whose only MI use is to convert the answerback
  38  * string to Unicode, and
  39  * (2) by clipme() when copying direct-to-font text to the clipboard.
  40  */
  41 int mb_to_wc(int codepage, int flags, char *mbstr, int mblen,
  42              wchar_t *wcstr, int wclen)
  43 {
  44     int ret = 0;
  45     while (mblen > 0 && wclen > 0) {
  46         *wcstr++ = (unsigned char) *mbstr++;
  47         mblen--, wclen--, ret++;
  48     }
  49     return ret;                        /* FIXME: check error codes! */
  50 }
  51
  52 /*
  53  * Convert from a system character set to Unicode.  Used by luni_send
  54  * to convert Unicode into the line character set.
  55  */
  56 int wc_to_mb(int codepage, int flags, wchar_t *wcstr, int wclen,
  57              char *mbstr, int mblen, char *defchr, int *defused,
  58              struct unicode_data *ucsdata)
  59 {
  60     int ret = 0;
  61     if (defused)
  62         *defused = 0;
  63     while (mblen > 0 && wclen > 0) {
  64         if (*wcstr >= 0x100) {
  65             if (defchr)
  66                 *mbstr++ = *defchr;
  67             else
  68                 *mbstr++ = '.';
  69             if (defused)
  70                 *defused = 1;
  71         } else
  72             *mbstr++ = (unsigned char) *wcstr;
  73         wcstr++;
  74         mblen--, wclen--, ret++;
  75     }
  76     return ret;                        /* FIXME: check error codes! */
  77 }
  78
  79 /* Character conversion array,
  80  * the xterm one has the four scanlines that have no unicode 2.0
  81  * equivalents mapped to their unicode 3.0 locations.
  82  */
  83 static const wchar_t unitab_xterm_std[32] = {
  84     0x2666, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
  85     0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
  86     0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
  87     0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x0020
  88 };
  89
  90 void init_ucs(Session *s)
  91 {
  92     int i;
  93
  94     /* Find the line control characters. FIXME: this is not right. */
  95     for (i = 0; i < 256; i++)
  96         if (i < ' ' || (i >= 0x7F && i < 0xA0))
  97             s->ucsdata.unitab_ctrl[i] = i;
  98         else
  99             s->ucsdata.unitab_ctrl[i] = 0xFF;
 100
 101     for (i = 0; i < 256; i++)
 102         s->ucsdata.unitab_line[i] = s->ucsdata.unitab_scoacs[i] = i;
 103
 104     /* VT100 graphics - NB: Broken for non-ascii CP's */
 105     memcpy(s->ucsdata.unitab_xterm, s->ucsdata.unitab_line,
 106            sizeof(s->ucsdata.unitab_xterm));
 107     memcpy(s->ucsdata.unitab_xterm + '`', unitab_xterm_std,
 108            sizeof(unitab_xterm_std));
 109     s->ucsdata.unitab_xterm['_'] = ' ';
 110
 111 }