release/src/router/libncurses/ncurses/trace/visbuf.c

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   2  * Copyright (c) 2001-2012,2014 Free Software Foundation, Inc.              *
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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey                        1996-on                 *
  31  *     and: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  32  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  33  ****************************************************************************/
  34
  35 /*
  36  *      visbuf.c - Tracing/Debugging support routines
  37  */
  38
  39 #define NEED_NCURSES_CH_T
  40 #include <curses.priv.h>
  41
  42 #include <tic.h>
  43 #include <ctype.h>
  44
  45 MODULE_ID("$Id: visbuf.c,v 1.44 2014/09/25 08:51:13 tom Exp $")
  46
  47 #define NUM_VISBUFS 4
  48
  49 #define NormalLen(len) (size_t) (((size_t)(len) + 1) * 4)
  50 #define WideLen(len)   (size_t) (((size_t)(len) + 1) * 4 * (size_t) MB_CUR_MAX)
  51
  52 #ifdef TRACE
  53 static const char d_quote[] = StringOf(D_QUOTE);
  54 static const char l_brace[] = StringOf(L_BRACE);
  55 static const char r_brace[] = StringOf(R_BRACE);
  56 #endif
  57
  58 #if USE_STRING_HACKS && HAVE_SNPRINTF
  59 #define VisChar(tp, chr, limit) _nc_vischar(tp, chr, limit)
  60 #define LIMIT_ARG ,size_t limit
  61 #else
  62 #define VisChar(tp, chr, limit) _nc_vischar(tp, chr)
  63 #define LIMIT_ARG               /* nothing */
  64 #endif
  65
  66 static char *
  67 _nc_vischar(char *tp, unsigned c LIMIT_ARG)
  68 {
  69     if (c == '"' || c == '\\') {
  70         *tp++ = '\\';
  71         *tp++ = (char) c;
  72     } else if (is7bits((int) c) && (isgraph((int) c) || c == ' ')) {
  73         *tp++ = (char) c;
  74     } else if (c == '\n') {
  75         *tp++ = '\\';
  76         *tp++ = 'n';
  77     } else if (c == '\r') {
  78         *tp++ = '\\';
  79         *tp++ = 'r';
  80     } else if (c == '\b') {
  81         *tp++ = '\\';
  82         *tp++ = 'b';
  83     } else if (c == '\033') {
  84         *tp++ = '\\';
  85         *tp++ = 'e';
  86     } else if (UChar(c) == 0x7f) {
  87         *tp++ = '\\';
  88         *tp++ = '^';
  89         *tp++ = '?';
  90     } else if (is7bits(c) && iscntrl(UChar(c))) {
  91         *tp++ = '\\';
  92         *tp++ = '^';
  93         *tp++ = (char) ('@' + c);
  94     } else {
  95         _nc_SPRINTF(tp, _nc_SLIMIT(limit)
  96                     "\\%03lo", (unsigned long) ChCharOf(c));
  97         tp += strlen(tp);
  98     }
  99     *tp = 0;
 100     return tp;
 101 }
 102
 103 static const char *
 104 _nc_visbuf2n(int bufnum, const char *buf, int len)
 105 {
 106     const char *vbuf = 0;
 107     char *tp;
 108     int c;
 109     int count;
 110
 111     if (buf == 0)
 112         return ("(null)");
 113     if (buf == CANCELLED_STRING)
 114         return ("(cancelled)");
 115
 116     if (len < 0)
 117         len = (int) strlen(buf);
 118
 119     count = len;
 120 #ifdef TRACE
 121     vbuf = tp = _nc_trace_buf(bufnum, NormalLen(len));
 122 #else
 123     {
 124         static char *mybuf[NUM_VISBUFS];
 125         if (bufnum < 0) {
 126             for (c = 0; c < NUM_VISBUFS; ++c) {
 127                 FreeAndNull(mybuf[c]);
 128             }
 129             tp = 0;
 130         } else {
 131             mybuf[bufnum] = typeRealloc(char, NormalLen(len), mybuf[bufnum]);
 132             vbuf = tp = mybuf[bufnum];
 133         }
 134     }
 135 #endif
 136     if (tp != 0) {
 137         *tp++ = D_QUOTE;
 138         while ((--count >= 0) && (c = *buf++) != '\0') {
 139             tp = VisChar(tp, UChar(c), NormalLen(len));
 140         }
 141         *tp++ = D_QUOTE;
 142         *tp = '\0';
 143     } else {
 144         vbuf = ("(_nc_visbuf2n failed)");
 145     }
 146     return (vbuf);
 147 }
 148
 149 NCURSES_EXPORT(const char *)
 150 _nc_visbuf2(int bufnum, const char *buf)
 151 {
 152     return _nc_visbuf2n(bufnum, buf, -1);
 153 }
 154
 155 NCURSES_EXPORT(const char *)
 156 _nc_visbuf(const char *buf)
 157 {
 158     return _nc_visbuf2(0, buf);
 159 }
 160
 161 NCURSES_EXPORT(const char *)
 162 _nc_visbufn(const char *buf, int len)
 163 {
 164     return _nc_visbuf2n(0, buf, len);
 165 }
 166
 167 #ifdef TRACE
 168 #if USE_WIDEC_SUPPORT
 169
 170 #if defined(USE_TERMLIB)
 171 #define _nc_wchstrlen _my_wchstrlen
 172 static int
 173 _nc_wchstrlen(const cchar_t *s)
 174 {
 175     int result = 0;
 176     while (CharOf(s[result]) != L'\0') {
 177         result++;
 178     }
 179     return result;
 180 }
 181 #endif
 182
 183 static const char *
 184 _nc_viswbuf2n(int bufnum, const wchar_t *buf, int len)
 185 {
 186     const char *vbuf;
 187     char *tp;
 188     wchar_t c;
 189     int count;
 190
 191     if (buf == 0)
 192         return ("(null)");
 193
 194     if (len < 0)
 195         len = (int) wcslen(buf);
 196
 197     count = len;
 198 #ifdef TRACE
 199     vbuf = tp = _nc_trace_buf(bufnum, WideLen(len));
 200 #else
 201     {
 202         static char *mybuf[NUM_VISBUFS];
 203         mybuf[bufnum] = typeRealloc(char, WideLen(len), mybuf[bufnum]);
 204         vbuf = tp = mybuf[bufnum];
 205     }
 206 #endif
 207     if (tp != 0) {
 208         *tp++ = D_QUOTE;
 209         while ((--count >= 0) && (c = *buf++) != '\0') {
 210             char temp[CCHARW_MAX + 80];
 211             int j = wctomb(temp, c), k;
 212             if (j <= 0) {
 213                 _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
 214                             "\\u%08X", (unsigned) c);
 215                 j = (int) strlen(temp);
 216             }
 217             for (k = 0; k < j; ++k) {
 218                 tp = VisChar(tp, UChar(temp[k]), WideLen(len));
 219             }
 220         }
 221         *tp++ = D_QUOTE;
 222         *tp = '\0';
 223     } else {
 224         vbuf = ("(_nc_viswbuf2n failed)");
 225     }
 226     return (vbuf);
 227 }
 228
 229 NCURSES_EXPORT(const char *)
 230 _nc_viswbuf2(int bufnum, const wchar_t *buf)
 231 {
 232     return _nc_viswbuf2n(bufnum, buf, -1);
 233 }
 234
 235 NCURSES_EXPORT(const char *)
 236 _nc_viswbuf(const wchar_t *buf)
 237 {
 238     return _nc_viswbuf2(0, buf);
 239 }
 240
 241 NCURSES_EXPORT(const char *)
 242 _nc_viswbufn(const wchar_t *buf, int len)
 243 {
 244     return _nc_viswbuf2n(0, buf, len);
 245 }
 246
 247 /* this special case is used for wget_wstr() */
 248 NCURSES_EXPORT(const char *)
 249 _nc_viswibuf(const wint_t *buf)
 250 {
 251     static wchar_t *mybuf;
 252     static unsigned mylen;
 253     unsigned n;
 254
 255     for (n = 0; buf[n] != 0; ++n) {
 256         ;                       /* empty */
 257     }
 258     if (mylen < ++n) {
 259         mylen = n + 80;
 260         if (mybuf != 0)
 261             mybuf = typeRealloc(wchar_t, mylen, mybuf);
 262         else
 263             mybuf = typeMalloc(wchar_t, mylen);
 264     }
 265     if (mybuf != 0) {
 266         for (n = 0; buf[n] != 0; ++n) {
 267             mybuf[n] = (wchar_t) buf[n];
 268         }
 269         mybuf[n] = L'\0';
 270     }
 271
 272     return _nc_viswbuf2(0, mybuf);
 273 }
 274 #endif /* USE_WIDEC_SUPPORT */
 275
 276 /* use these functions for displaying parts of a line within a window */
 277 NCURSES_EXPORT(const char *)
 278 _nc_viscbuf2(int bufnum, const NCURSES_CH_T * buf, int len)
 279 {
 280     char *result = _nc_trace_buf(bufnum, (size_t) BUFSIZ);
 281     int first;
 282     const char *found;
 283
 284     if (result != 0) {
 285 #if USE_WIDEC_SUPPORT
 286         if (len < 0)
 287             len = _nc_wchstrlen(buf);
 288 #endif /* USE_WIDEC_SUPPORT */
 289
 290         /*
 291          * Display one or more strings followed by attributes.
 292          */
 293         first = 0;
 294         while (first < len) {
 295             attr_t attr = AttrOf(buf[first]);
 296             int last = len - 1;
 297             int j;
 298
 299             for (j = first + 1; j < len; ++j) {
 300                 if (!SameAttrOf(buf[j], buf[first])) {
 301                     last = j - 1;
 302                     break;
 303                 }
 304             }
 305
 306             (void) _nc_trace_bufcat(bufnum, l_brace);
 307             (void) _nc_trace_bufcat(bufnum, d_quote);
 308             for (j = first; j <= last; ++j) {
 309                 found = _nc_altcharset_name(attr, (chtype) CharOf(buf[j]));
 310                 if (found != 0) {
 311                     (void) _nc_trace_bufcat(bufnum, found);
 312                     attr &= ~A_ALTCHARSET;
 313                 } else
 314 #if USE_WIDEC_SUPPORT
 315                 if (!isWidecExt(buf[j])) {
 316                     PUTC_DATA;
 317
 318                     PUTC_INIT;
 319                     for (PUTC_i = 0; PUTC_i < CCHARW_MAX; ++PUTC_i) {
 320                         int k;
 321
 322                         PUTC_ch = buf[j].chars[PUTC_i];
 323                         if (PUTC_ch == L'\0') {
 324                             if (PUTC_i == 0)
 325                                 (void) _nc_trace_bufcat(bufnum, "\\000");
 326                             break;
 327                         }
 328                         PUTC_n = (int) wcrtomb(PUTC_buf,
 329                                                buf[j].chars[PUTC_i], &PUT_st);
 330                         if (PUTC_n <= 0)
 331                             break;
 332                         for (k = 0; k < PUTC_n; k++) {
 333                             char temp[80];
 334                             VisChar(temp, UChar(PUTC_buf[k]), sizeof(temp));
 335                             (void) _nc_trace_bufcat(bufnum, temp);
 336                         }
 337                     }
 338                 }
 339 #else
 340                 {
 341                     char temp[80];
 342                     VisChar(temp, UChar(buf[j]), sizeof(temp));
 343                     (void) _nc_trace_bufcat(bufnum, temp);
 344                 }
 345 #endif /* USE_WIDEC_SUPPORT */
 346             }
 347             (void) _nc_trace_bufcat(bufnum, d_quote);
 348             if (attr != A_NORMAL) {
 349                 (void) _nc_trace_bufcat(bufnum, " | ");
 350                 (void) _nc_trace_bufcat(bufnum, _traceattr2(bufnum + 20, attr));
 351             }
 352             result = _nc_trace_bufcat(bufnum, r_brace);
 353             first = last + 1;
 354         }
 355     }
 356     return result;
 357 }
 358
 359 NCURSES_EXPORT(const char *)
 360 _nc_viscbuf(const NCURSES_CH_T * buf, int len)
 361 {
 362     return _nc_viscbuf2(0, buf, len);
 363 }
 364 #endif /* TRACE */