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

   1 /* $Id: macucs.c,v 1.3 2003/01/02 23:39:53 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 {
  59     int ret = 0;
  60     if (defused)
  61         *defused = 0;
  62     while (mblen > 0 && wclen > 0) {
  63         if (*wcstr >= 0x100) {
  64             if (defchr)
  65                 *mbstr++ = *defchr;
  66             else
  67                 *mbstr++ = '.';
  68             if (defused)
  69                 *defused = 1;
  70         } else
  71             *mbstr++ = (unsigned char) *wcstr;
  72         wcstr++;
  73         mblen--, wclen--, ret++;
  74     }
  75     return ret;                        /* FIXME: check error codes! */
  76 }
  77
  78 void init_ucs(void)
  79 {
  80     int i;
  81     /* Find the line control characters. FIXME: this is not right. */
  82     for (i = 0; i < 256; i++)
  83         if (i < ' ' || (i >= 0x7F && i < 0xA0))
  84             unitab_ctrl[i] = i;
  85         else
  86             unitab_ctrl[i] = 0xFF;
  87
  88     for (i = 0; i < 256; i++) {
  89         unitab_line[i] = unitab_scoacs[i] = i;
  90         unitab_xterm[i] = (i >= 0x5F && i < 0x7F) ? ((i+1) & 0x1F) : i;
  91     }
  92 }