ncurses/base/lib_addstr.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc.              *
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  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  ****************************************************************************/
  33
  34 /*
  35 **      lib_addstr.c
  36 *
  37 **      The routines waddnstr(), waddchnstr().
  38 **
  39 */
  40
  41 #include <curses.priv.h>
  42
  43 MODULE_ID("$Id: lib_addstr.c,v 1.34 2002/10/06 00:25:25 tom Exp $")
  44
  45 #if USE_WIDEC_SUPPORT
  46 #define CONV_DATA   mbstate_t state; wchar_t cached; int clen = 0
  47 #define CONV_INIT   memset (&state, '\0', sizeof (state)); cached = (wchar_t)WEOF
  48 #define NEXT_CHAR(s,ch, n)                                              \
  49     {                                                                   \
  50         int len, i = 0;                                                 \
  51         memset(&ch, 0, sizeof(cchar_t));                                \
  52         if (cached != (wchar_t) WEOF) {                                 \
  53             ch.chars[i++] = cached;                                     \
  54             cached = (wchar_t) WEOF;                                    \
  55             n -= clen;                                                  \
  56             s += clen;                                                  \
  57         }                                                               \
  58         for (; i < CCHARW_MAX && n > 0; ++i) {                          \
  59             if ((len = mbrtowc(&ch.chars[i], s, n, &state)) < 0) {      \
  60                 code = ERR;                                             \
  61                 break;                                                  \
  62             }                                                           \
  63             if (i == 0 || wcwidth(ch.chars[i]) == 0) {                  \
  64                 n -= len;                                               \
  65                 s += len;                                               \
  66             } else {                                                    \
  67                 cached = ch.chars[i];                                   \
  68                 clen = len;                                             \
  69                 ch.chars[i] = L'\0';                                    \
  70                 break;                                                  \
  71             }                                                           \
  72         }                                                               \
  73         if (code == ERR)                                                \
  74             break;                                                      \
  75     }
  76 #else
  77 #define CONV_DATA
  78 #define CONV_INIT
  79 #define NEXT_CHAR(s,ch, n)                                              \
  80     ch = *s++;                                                          \
  81     --n
  82 #endif
  83
  84 NCURSES_EXPORT(int)
  85 waddnstr(WINDOW *win, const char *astr, int n)
  86 {
  87     unsigned const char *str = (unsigned const char *) astr;
  88     int code = ERR;
  89     CONV_DATA;
  90
  91     T((T_CALLED("waddnstr(%p,%s,%d)"), win, _nc_visbufn(astr, n), n));
  92
  93     if (win && (str != 0)) {
  94         TR(TRACE_VIRTPUT | TRACE_ATTRS, ("... current %s", _traceattr(win->_attrs)));
  95         code = OK;
  96         if (n < 0)
  97             n = (int) strlen(astr);
  98
  99         TR(TRACE_VIRTPUT, ("str is not null, length = %d", n));
 100         CONV_INIT;
 101         while ((n > 0) && (*str != '\0')) {
 102             NCURSES_CH_T ch;
 103             TR(TRACE_VIRTPUT, ("*str = %#x", *str));
 104             NEXT_CHAR(str, ch, n);
 105             if (_nc_waddch_nosync(win, ch) == ERR) {
 106                 code = ERR;
 107                 break;
 108             }
 109         }
 110         _nc_synchook(win);
 111     }
 112     TR(TRACE_VIRTPUT, ("waddnstr returns %d", code));
 113     returnCode(code);
 114 }
 115
 116 NCURSES_EXPORT(int)
 117 waddchnstr(WINDOW *win, const chtype * astr, int n)
 118 {
 119     NCURSES_SIZE_T y = win->_cury;
 120     NCURSES_SIZE_T x = win->_curx;
 121     int code = OK;
 122     struct ldat *line;
 123
 124     T((T_CALLED("waddchnstr(%p,%p,%d)"), win, astr, n));
 125
 126     if (!win)
 127         returnCode(ERR);
 128
 129     if (n < 0) {
 130         const chtype *str;
 131         n = 0;
 132         for (str = (const chtype *) astr; *str != 0; str++)
 133             n++;
 134     }
 135     if (n > win->_maxx - x + 1)
 136         n = win->_maxx - x + 1;
 137     if (n == 0)
 138         returnCode(code);
 139
 140     line = &(win->_line[y]);
 141 #if USE_WIDEC_SUPPORT
 142     {
 143         int i;
 144         for (i = 0; i < n; ++i)
 145             SetChar(line->text[i + x], ChCharOf(astr[i]), ChAttrOf(astr[i]));
 146     }
 147 #else
 148     memcpy(line->text + x, astr, n * sizeof(*astr));
 149 #endif
 150     CHANGED_RANGE(line, x, x + n - 1);
 151
 152     _nc_synchook(win);
 153     returnCode(code);
 154 }
 155
 156 #if USE_WIDEC_SUPPORT
 157
 158 int
 159 _nc_wchstrlen(const cchar_t * s)
 160 {
 161     int result = 0;
 162     while (CharOf(s[result]) != L'\0') {
 163         result++;
 164     }
 165     return result;
 166 }
 167
 168 NCURSES_EXPORT(int)
 169 wadd_wchnstr(WINDOW *win, const cchar_t * const astr, int n)
 170 {
 171     NCURSES_SIZE_T y = win->_cury;
 172     NCURSES_SIZE_T x = win->_curx;
 173     int code = OK;
 174     struct ldat *line;
 175     int i, start, end;
 176
 177     T((T_CALLED("wadd_wchnstr(%p,%s,%d)"), win, _nc_viscbuf(astr, n), n));
 178
 179     if (!win)
 180         returnCode(ERR);
 181
 182     if (n < 0) {
 183         n = _nc_wchstrlen(astr);
 184     }
 185     if (n > win->_maxx - x + 1)
 186         n = win->_maxx - x + 1;
 187     if (n == 0)
 188         returnCode(code);
 189
 190     line = &(win->_line[y]);
 191     start = x;
 192     end = x + n - 1;
 193     if (isnac(line->text[x])) {
 194         line->text[x - 1] = win->_nc_bkgd;
 195         --start;
 196     }
 197     for (i = 0; i < n && x <= win->_maxx; ++i) {
 198         line->text[x++] = astr[i];
 199         if (wcwidth(CharOf(astr[i])) > 1) {
 200             if (x <= win->_maxx)
 201                 AddAttr(line->text[x++], WA_NAC);
 202             else
 203                 line->text[x - 1] = win->_nc_bkgd;
 204         }
 205     }
 206     if (x <= win->_maxx && isnac(line->text[x])) {
 207         line->text[x] = win->_nc_bkgd;
 208         ++end;
 209     }
 210     CHANGED_RANGE(line, start, end);
 211
 212     _nc_synchook(win);
 213     returnCode(code);
 214 }
 215
 216 NCURSES_EXPORT(int)
 217 waddnwstr(WINDOW *win, const wchar_t * str, int n)
 218 {
 219     int code = ERR;
 220     int i;
 221
 222     T((T_CALLED("waddnwstr(%p,%s,%d)"), win, _nc_viswbufn(str,n), n));
 223
 224     if (win && (str != 0)) {
 225         TR(TRACE_VIRTPUT | TRACE_ATTRS, ("... current %s", _traceattr(win->_attrs)));
 226         code = OK;
 227         if (n < 0)
 228             n = (int) wcslen(str);
 229
 230         TR(TRACE_VIRTPUT, ("str is not null, length = %d", n));
 231         while ((n-- > 0) && (*str != L('\0'))) {
 232             NCURSES_CH_T ch;
 233             TR(TRACE_VIRTPUT, ("*str[0] = %#lx", *str));
 234             SetChar(ch, *str++, A_NORMAL);
 235             i = 1;
 236             while (i < CCHARW_MAX && n > 0 && (*str != L('\0'))
 237                    && wcwidth(*str) == 0) {
 238                 TR(TRACE_VIRTPUT, ("*str[%d] = %#lx", i, *str));
 239                 ch.chars[i++] = *str++;
 240                 --n;
 241             }
 242             if (_nc_waddch_nosync(win, ch) == ERR) {
 243                 code = ERR;
 244                 break;
 245             }
 246         }
 247         _nc_synchook(win);
 248     }
 249     TR(TRACE_VIRTPUT, ("waddnwstr returns %d", code));
 250     returnCode(code);
 251 }
 252
 253 #endif