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

   1 /* $Id$ */
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <ctype.h>
   6
   7 #include <time.h>
   8 #include "putty.h"
   9 #include "charset.h"
  10 #include "terminal.h"
  11 #include "misc.h"
  12 #include "mac.h"
  13
  14 /*
  15  * Mac Unicode-handling routines.
  16  *
  17  * BJH:
  18  * What we _should_ do is to use the Text Encoding Conversion Manager
  19  * when it's available, and have our own routines for converting to
  20  * standard Mac OS scripts when it's not.  Support for ATSUI might be
  21  * nice, too.
  22  *
  23  * I (OSD) am unsure any of the above is necessary if we just use
  24  * libcharset */
  25
  26 /*
  27  * Determine whether a byte is the first byte of a double-byte
  28  * character in a system character set.  Only MI use is by clipme()
  29  * when copying direct-to-font text to the clipboard.
  30  */
  31 int is_dbcs_leadbyte(int codepage, char byte)
  32 {
  33     return 0;                          /* we don't do DBCS */
  34 }
  35
  36 /*
  37  * Convert from Unicode to a system character set.  MI uses are:
  38  * (1) by lpage_send(), whose only MI use is to convert the answerback
  39  * string to Unicode, and
  40  * (2) by clipme() when copying direct-to-font text to the clipboard.
  41  */
  42 int mb_to_wc(int codepage, int flags, char *mbstr, int mblen,
  43              wchar_t *wcstr, int wclen)
  44 {
  45     int ret = 0;
  46     while (mblen > 0 && wclen > 0) {
  47         *wcstr++ = (unsigned char) *mbstr++;
  48         mblen--, wclen--, ret++;
  49     }
  50     return ret;                        /* FIXME: check error codes! */
  51 }
  52
  53 /*
  54  * Convert from a system character set to Unicode.  Used by luni_send
  55  * to convert Unicode into the line character set.
  56  */
  57 int wc_to_mb(int codepage, int flags, wchar_t *wcstr, int wclen,
  58              char *mbstr, int mblen, char *defchr, int *defused,
  59              struct unicode_data *ucsdata)
  60 {
  61     int ret = 0;
  62     if (defused)
  63         *defused = 0;
  64     while (mblen > 0 && wclen > 0) {
  65         if (*wcstr >= 0x100) {
  66             if (defchr)
  67                 *mbstr++ = *defchr;
  68             else
  69                 *mbstr++ = '.';
  70             if (defused)
  71                 *defused = 1;
  72         } else
  73             *mbstr++ = (unsigned char) *wcstr;
  74         wcstr++;
  75         mblen--, wclen--, ret++;
  76     }
  77     return ret;                        /* FIXME: check error codes! */
  78 }
  79
  80 /* Character conversion array,
  81  * the xterm one has the four scanlines that have no unicode 2.0
  82  * equivalents mapped to their unicode 3.0 locations.
  83  */
  84 static const wchar_t unitab_xterm_std[32] = {
  85     0x2666, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
  86     0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
  87     0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
  88     0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x0020
  89 };
  90
  91 void init_ucs(Session *s)
  92 {
  93     int i;
  94
  95     s->ucsdata.line_codepage = decode_codepage(s->cfg.line_codepage);
  96
  97     /* Find the line control characters. FIXME: this is not right. */
  98     for (i = 0; i < 256; i++)
  99         if (i < ' ' || (i >= 0x7F && i < 0xA0))
 100             s->ucsdata.unitab_ctrl[i] = i;
 101         else
 102             s->ucsdata.unitab_ctrl[i] = 0xFF;
 103
 104     for (i = 0; i < 256; i++)
 105         s->ucsdata.unitab_line[i] = s->ucsdata.unitab_scoacs[i] = i;
 106
 107     /* VT100 graphics - NB: Broken for non-ascii CP's */
 108     memcpy(s->ucsdata.unitab_xterm, s->ucsdata.unitab_line,
 109            sizeof(s->ucsdata.unitab_xterm));
 110     memcpy(s->ucsdata.unitab_xterm + '`', unitab_xterm_std,
 111            sizeof(unitab_xterm_std));
 112     s->ucsdata.unitab_xterm['_'] = ' ';
 113
 114 }
 115
 116 int decode_codepage(char *cp_name)
 117 {
 118     if (!*cp_name)
 119         return CS_NONE;                /* use font encoding */
 120     return charset_from_localenc(cp_name);
 121 }
 122
 123 char const *cp_enumerate (int index)
 124 {
 125     int charset;
 126     if (index == 0)
 127         return "Use font encoding";
 128     charset = charset_localenc_nth(index-1);
 129     if (charset == CS_NONE)
 130         return NULL;
 131     return charset_to_localenc(charset);
 132 }
 133
 134 char const *cp_name(int codepage)
 135 {
 136     if (codepage == CS_NONE)
 137         return "Use font encoding";
 138     return charset_to_localenc(codepage);
 139 }