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Rename most of the platform source files.
This gets rid of all those annoying 'win', 'ux' and 'gtk' prefixes which made filenames annoying to type and to tab-complete. Also, as with my other recent renaming sprees, I've taken the opportunity to expand and clarify some of the names so that they're not such cryptic abbreviations.
This commit is contained in:
Simon Tatham
268
unix/unicode.c
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268
unix/unicode.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <locale.h>
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#include <limits.h>
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#include <wchar.h>
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#include <time.h>
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#include "putty.h"
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#include "charset.h"
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#include "terminal.h"
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#include "misc.h"
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/*
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* Unix Unicode-handling routines.
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*/
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bool is_dbcs_leadbyte(int codepage, char byte)
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{
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return false; /* we don't do DBCS */
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}
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int mb_to_wc(int codepage, int flags, const char *mbstr, int mblen,
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wchar_t *wcstr, int wclen)
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{
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if (codepage == DEFAULT_CODEPAGE) {
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int n = 0;
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mbstate_t state;
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memset(&state, 0, sizeof state);
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while (mblen > 0) {
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size_t i = mbrtowc(wcstr+n, mbstr, (size_t)mblen, &state);
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if (i == (size_t)-1 || i == (size_t)-2)
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break;
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n++;
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mbstr += i;
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mblen -= i;
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}
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return n;
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} else if (codepage == CS_NONE) {
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int n = 0;
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while (mblen > 0) {
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wcstr[n] = 0xD800 | (mbstr[0] & 0xFF);
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n++;
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mbstr++;
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mblen--;
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}
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return n;
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} else
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return charset_to_unicode(&mbstr, &mblen, wcstr, wclen, codepage,
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NULL, NULL, 0);
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}
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int wc_to_mb(int codepage, int flags, const wchar_t *wcstr, int wclen,
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char *mbstr, int mblen, const char *defchr,
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struct unicode_data *ucsdata)
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{
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if (codepage == DEFAULT_CODEPAGE) {
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char output[MB_LEN_MAX];
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mbstate_t state;
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int n = 0;
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memset(&state, 0, sizeof state);
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while (wclen > 0) {
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size_t i = wcrtomb(output, wcstr[0], &state);
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if (i == (size_t)-1 || i > n - mblen)
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break;
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memcpy(mbstr+n, output, i);
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n += i;
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wcstr++;
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wclen--;
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}
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return n;
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} else if (codepage == CS_NONE) {
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int n = 0;
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while (wclen > 0 && n < mblen) {
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if (*wcstr >= 0xD800 && *wcstr < 0xD900)
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mbstr[n++] = (*wcstr & 0xFF);
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else if (defchr)
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mbstr[n++] = *defchr;
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wcstr++;
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wclen--;
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}
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return n;
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} else {
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return charset_from_unicode(&wcstr, &wclen, mbstr, mblen, codepage,
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NULL, defchr?defchr:NULL, defchr?1:0);
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}
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}
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/*
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* Return value is true if pterm is to run in direct-to-font mode.
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*/
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bool init_ucs(struct unicode_data *ucsdata, char *linecharset,
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bool utf8_override, int font_charset, int vtmode)
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{
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int i;
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bool ret = false;
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/*
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* In the platform-independent parts of the code, font_codepage
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* is used only for system DBCS support - which we don't
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* support at all. So we set this to something which will never
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* be used.
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*/
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ucsdata->font_codepage = -1;
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/*
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* If utf8_override is set and the POSIX locale settings
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* dictate a UTF-8 character set, then just go straight for
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* UTF-8.
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*/
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ucsdata->line_codepage = CS_NONE;
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if (utf8_override) {
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const char *s;
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if (((s = getenv("LC_ALL")) && *s) ||
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((s = getenv("LC_CTYPE")) && *s) ||
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((s = getenv("LANG")) && *s)) {
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if (strstr(s, "UTF-8"))
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ucsdata->line_codepage = CS_UTF8;
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}
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}
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/*
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* Failing that, line_codepage should be decoded from the
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* specification in conf.
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*/
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if (ucsdata->line_codepage == CS_NONE)
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ucsdata->line_codepage = decode_codepage(linecharset);
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/*
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* If line_codepage is _still_ CS_NONE, we assume we're using
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* the font's own encoding. This has been passed in to us, so
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* we use that. If it's still CS_NONE after _that_ - i.e. the
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* font we were given had an incomprehensible charset - then we
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* fall back to using the D800 page.
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*/
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if (ucsdata->line_codepage == CS_NONE)
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ucsdata->line_codepage = font_charset;
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if (ucsdata->line_codepage == CS_NONE)
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ret = true;
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/*
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* Set up unitab_line, by translating each individual character
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* in the line codepage into Unicode.
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*/
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for (i = 0; i < 256; i++) {
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char c[1];
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const char *p;
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wchar_t wc[1];
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int len;
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c[0] = i;
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p = c;
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len = 1;
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if (ucsdata->line_codepage == CS_NONE)
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ucsdata->unitab_line[i] = 0xD800 | i;
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else if (1 == charset_to_unicode(&p, &len, wc, 1,
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ucsdata->line_codepage,
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NULL, L"", 0))
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ucsdata->unitab_line[i] = wc[0];
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else
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ucsdata->unitab_line[i] = 0xFFFD;
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}
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/*
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* Set up unitab_xterm. This is the same as unitab_line except
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* in the line-drawing regions, where it follows the Unicode
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* encoding.
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*
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* (Note that the strange X encoding of line-drawing characters
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* in the bottom 32 glyphs of ISO8859-1 fonts is taken care of
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* by the font encoding, which will spot such a font and act as
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* if it were in a variant encoding of ISO8859-1.)
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*/
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for (i = 0; i < 256; i++) {
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static const wchar_t unitab_xterm_std[32] = {
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0x2666, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
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0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
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0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
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0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x0020
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};
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static const wchar_t unitab_xterm_poorman[32] =
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L"*#****o~**+++++-----++++|****L. ";
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const wchar_t *ptr;
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if (vtmode == VT_POORMAN)
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ptr = unitab_xterm_poorman;
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else
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ptr = unitab_xterm_std;
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if (i >= 0x5F && i < 0x7F)
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ucsdata->unitab_xterm[i] = ptr[i & 0x1F];
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else
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ucsdata->unitab_xterm[i] = ucsdata->unitab_line[i];
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}
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/*
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* Set up unitab_scoacs. The SCO Alternate Character Set is
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* simply CP437.
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*/
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for (i = 0; i < 256; i++) {
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char c[1];
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const char *p;
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wchar_t wc[1];
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int len;
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c[0] = i;
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p = c;
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len = 1;
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if (1 == charset_to_unicode(&p, &len, wc, 1, CS_CP437, NULL, L"", 0))
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ucsdata->unitab_scoacs[i] = wc[0];
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else
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ucsdata->unitab_scoacs[i] = 0xFFFD;
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}
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/*
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* Find the control characters in the line codepage. For
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* direct-to-font mode using the D800 hack, we assume 00-1F and
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* 7F are controls, but allow 80-9F through. (It's as good a
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* guess as anything; and my bet is that half the weird fonts
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* used in this way will be IBM or MS code pages anyway.)
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*/
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for (i = 0; i < 256; i++) {
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int lineval = ucsdata->unitab_line[i];
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if (lineval < ' ' || (lineval >= 0x7F && lineval < 0xA0) ||
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(lineval >= 0xD800 && lineval < 0xD820) || (lineval == 0xD87F))
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ucsdata->unitab_ctrl[i] = i;
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else
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ucsdata->unitab_ctrl[i] = 0xFF;
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}
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return ret;
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}
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const char *cp_name(int codepage)
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{
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if (codepage == CS_NONE)
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return "Use font encoding";
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return charset_to_localenc(codepage);
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}
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const char *cp_enumerate(int index)
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{
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int charset;
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charset = charset_localenc_nth(index);
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if (charset == CS_NONE) {
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/* "Use font encoding" comes after all the named charsets */
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if (charset_localenc_nth(index-1) != CS_NONE)
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return "Use font encoding";
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return NULL;
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}
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return charset_to_localenc(charset);
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}
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int decode_codepage(char *cp_name)
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{
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if (!cp_name || !*cp_name)
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return CS_UTF8;
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return charset_from_localenc(cp_name);
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}
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