release/src/router/libncurses/ncurses/base/lib_slkset.c

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  28
  29 /****************************************************************************
  30  *  Author: Juergen Pfeifer                                                 *
  31  *     and: Thomas E. Dickey                                                *
  32  ****************************************************************************/
  33
  34 /*
  35  *      lib_slkset.c
  36  *      Set soft label text.
  37  */
  38 #include <curses.priv.h>
  39 #include <ctype.h>
  40
  41 #if USE_WIDEC_SUPPORT
  42 #if HAVE_WCTYPE_H
  43 #include <wctype.h>
  44 #endif
  45 #endif
  46
  47 MODULE_ID("$Id: lib_slkset.c,v 1.24 2012/12/08 23:09:25 tom Exp $")
  48
  49 NCURSES_EXPORT(int)
  50 NCURSES_SP_NAME(slk_set) (NCURSES_SP_DCLx int i, const char *astr, int format)
  51 {
  52     SLK *slk;
  53     int offset = 0;
  54     int numchrs;
  55     int numcols;
  56     int limit;
  57     const char *str = astr;
  58     const char *p;
  59
  60     T((T_CALLED("slk_set(%p, %d, \"%s\", %d)"), (void *) SP_PARM, i, str, format));
  61
  62     if (SP_PARM == 0
  63         || (slk = SP_PARM->_slk) == 0
  64         || i < 1
  65         || i > slk->labcnt
  66         || format < 0
  67         || format > 2)
  68         returnCode(ERR);
  69     if (str == 0)
  70         str = "";
  71     --i;                        /* Adjust numbering of labels */
  72
  73     limit = MAX_SKEY_LEN(SP_PARM->slk_format);
  74     while (isspace(UChar(*str)))
  75         str++;                  /* skip over leading spaces  */
  76     p = str;
  77
  78 #if USE_WIDEC_SUPPORT
  79     numcols = 0;
  80     while (*p != 0) {
  81         mbstate_t state;
  82         wchar_t wc;
  83         size_t need;
  84
  85         init_mb(state);
  86         need = mbrtowc(0, p, strlen(p), &state);
  87         if (need == (size_t) -1)
  88             break;
  89         mbrtowc(&wc, p, need, &state);
  90         if (!iswprint((wint_t) wc))
  91             break;
  92         if (wcwidth(wc) + numcols > limit)
  93             break;
  94         numcols += wcwidth(wc);
  95         p += need;
  96     }
  97     numchrs = (int) (p - str);
  98 #else
  99     while (isprint(UChar(*p)))
 100         p++;                    /* The first non-print stops */
 101
 102     numcols = (int) (p - str);
 103     if (numcols > limit)
 104         numcols = limit;
 105     numchrs = numcols;
 106 #endif
 107
 108     FreeIfNeeded(slk->ent[i].ent_text);
 109     if ((slk->ent[i].ent_text = strdup(str)) == 0)
 110         returnCode(ERR);
 111     slk->ent[i].ent_text[numchrs] = '\0';
 112
 113     if ((slk->ent[i].form_text = (char *) _nc_doalloc(slk->ent[i].form_text,
 114                                                       (size_t) (limit +
 115                                                                 numchrs + 1))
 116         ) == 0)
 117         returnCode(ERR);
 118
 119     switch (format) {
 120     case 0:                     /* left-justified */
 121         offset = 0;
 122         break;
 123     case 1:                     /* centered */
 124         offset = (limit - numcols) / 2;
 125         break;
 126     case 2:                     /* right-justified */
 127         offset = limit - numcols;
 128         break;
 129     }
 130     if (offset <= 0)
 131         offset = 0;
 132     else
 133         memset(slk->ent[i].form_text, ' ', (size_t) offset);
 134
 135     memcpy(slk->ent[i].form_text + offset,
 136            slk->ent[i].ent_text,
 137            (size_t) numchrs);
 138
 139     if (offset < limit) {
 140         memset(slk->ent[i].form_text + offset + numchrs,
 141                ' ',
 142                (size_t) (limit - (offset + numcols)));
 143     }
 144
 145     slk->ent[i].form_text[numchrs - numcols + limit] = 0;
 146     slk->ent[i].dirty = TRUE;
 147     returnCode(OK);
 148 }
 149
 150 #if NCURSES_SP_FUNCS
 151 NCURSES_EXPORT(int)
 152 slk_set(int i, const char *astr, int format)
 153 {
 154     return NCURSES_SP_NAME(slk_set) (CURRENT_SCREEN, i, astr, format);
 155 }
 156 #endif