release/src/router/libncurses/ncurses/tinfo/lib_tputs.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2013,2015 Free Software Foundation, Inc.              *
   3  *                                                                          *
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   5  * copy of this software and associated documentation files (the            *
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   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
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  26  * authorization.                                                           *
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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  *     and: Thomas E. Dickey                        1996-on                 *
  33  *     and: Juergen Pfeifer                         2009                    *
  34  ****************************************************************************/
  35
  36 /*
  37  *      tputs.c
  38  *              delay_output()
  39  *              _nc_outch()
  40  *              tputs()
  41  *
  42  */
  43
  44 #include <curses.priv.h>
  45
  46 #ifndef CUR
  47 #define CUR SP_TERMTYPE
  48 #endif
  49
  50 #include <ctype.h>
  51 #include <termcap.h>            /* ospeed */
  52 #include <tic.h>
  53
  54 MODULE_ID("$Id: lib_tputs.c,v 1.96 2015/01/03 23:51:23 tom Exp $")
  55
  56 NCURSES_EXPORT_VAR(char) PC = 0;              /* used by termcap library */
  57 NCURSES_EXPORT_VAR(NCURSES_OSPEED) ospeed = 0;        /* used by termcap library */
  58
  59 NCURSES_EXPORT_VAR(int) _nc_nulls_sent = 0;   /* used by 'tack' program */
  60
  61 #if NCURSES_NO_PADDING
  62 NCURSES_EXPORT(void)
  63 _nc_set_no_padding(SCREEN *sp)
  64 {
  65     bool no_padding = (getenv("NCURSES_NO_PADDING") != 0);
  66
  67     if (sp)
  68         sp->_no_padding = no_padding;
  69     else
  70         _nc_prescreen._no_padding = no_padding;
  71
  72     TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
  73                                     GetNoPadding(sp) ? " not" : ""));
  74 }
  75 #endif
  76
  77 #if NCURSES_SP_FUNCS
  78 #define SetOutCh(func) if (SP_PARM) SP_PARM->_outch = func; else _nc_prescreen._outch = func
  79 #define GetOutCh()     (SP_PARM ? SP_PARM->_outch : _nc_prescreen._outch)
  80 #else
  81 #define SetOutCh(func) static_outch = func
  82 #define GetOutCh()     static_outch
  83 static NCURSES_SP_OUTC static_outch = NCURSES_SP_NAME(_nc_outch);
  84 #endif
  85
  86 NCURSES_EXPORT(int)
  87 NCURSES_SP_NAME(delay_output) (NCURSES_SP_DCLx int ms)
  88 {
  89     T((T_CALLED("delay_output(%p,%d)"), (void *) SP_PARM, ms));
  90
  91     if (!HasTInfoTerminal(SP_PARM))
  92         returnCode(ERR);
  93
  94     if (no_pad_char) {
  95         NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
  96         napms(ms);
  97     } else {
  98         NCURSES_SP_OUTC my_outch = GetOutCh();
  99         register int nullcount;
 100
 101         nullcount = (ms * _nc_baudrate(ospeed)) / (BAUDBYTE * 1000);
 102         for (_nc_nulls_sent += nullcount; nullcount > 0; nullcount--)
 103             my_outch(NCURSES_SP_ARGx PC);
 104         if (my_outch == NCURSES_SP_NAME(_nc_outch))
 105             NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
 106     }
 107
 108     returnCode(OK);
 109 }
 110
 111 #if NCURSES_SP_FUNCS
 112 NCURSES_EXPORT(int)
 113 delay_output(int ms)
 114 {
 115     return NCURSES_SP_NAME(delay_output) (CURRENT_SCREEN, ms);
 116 }
 117 #endif
 118
 119 NCURSES_EXPORT(void)
 120 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_DCL0)
 121 {
 122     if (SP_PARM != 0 && SP_PARM->_ofd >= 0) {
 123         if (SP_PARM->out_inuse) {
 124             char *buf = SP_PARM->out_buffer;
 125             size_t amount = SP->out_inuse;
 126             ssize_t res;
 127
 128             SP->out_inuse = 0;
 129             while (amount) {
 130                 res = write(SP_PARM->_ofd, buf, amount);
 131
 132                 if (res > 0) {
 133                     /* if the write was incomplete, try again */
 134                     amount -= (size_t) res;
 135                     buf += res;
 136                 } else if (errno == EAGAIN) {
 137                     continue;
 138                 } else if (errno == EINTR) {
 139                     continue;
 140                 } else {
 141                     break;      /* an error we can not recover from */
 142                 }
 143             }
 144         }
 145     }
 146 }
 147
 148 #if NCURSES_SP_FUNCS
 149 NCURSES_EXPORT(void)
 150 _nc_flush(void)
 151 {
 152     NCURSES_SP_NAME(_nc_flush) (CURRENT_SCREEN);
 153 }
 154 #endif
 155
 156 NCURSES_EXPORT(int)
 157 NCURSES_SP_NAME(_nc_outch) (NCURSES_SP_DCLx int ch)
 158 {
 159     int rc = OK;
 160
 161     COUNT_OUTCHARS(1);
 162
 163     if (HasTInfoTerminal(SP_PARM)
 164         && SP_PARM != 0) {
 165         if (SP_PARM->out_buffer != 0) {
 166             if (SP_PARM->out_inuse + 1 >= SP_PARM->out_limit)
 167                 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
 168             SP_PARM->out_buffer[SP_PARM->out_inuse++] = (char) ch;
 169         } else {
 170             char tmp = (char) ch;
 171             /*
 172              * POSIX says write() is safe in a signal handler, but the
 173              * buffered I/O is not.
 174              */
 175             if (write(fileno(NC_OUTPUT(SP_PARM)), &tmp, (size_t) 1) == -1)
 176                 rc = ERR;
 177         }
 178     } else {
 179         char tmp = (char) ch;
 180         if (write(fileno(stdout), &tmp, (size_t) 1) == -1)
 181             rc = ERR;
 182     }
 183     return rc;
 184 }
 185
 186 #if NCURSES_SP_FUNCS
 187 NCURSES_EXPORT(int)
 188 _nc_outch(int ch)
 189 {
 190     return NCURSES_SP_NAME(_nc_outch) (CURRENT_SCREEN, ch);
 191 }
 192 #endif
 193
 194 /*
 195  * This is used for the putp special case.
 196  */
 197 NCURSES_EXPORT(int)
 198 NCURSES_SP_NAME(_nc_putchar) (NCURSES_SP_DCLx int ch)
 199 {
 200     (void) SP_PARM;
 201     return putchar(ch);
 202 }
 203
 204 #if NCURSES_SP_FUNCS
 205 NCURSES_EXPORT(int)
 206 _nc_putchar(int ch)
 207 {
 208     return putchar(ch);
 209 }
 210 #endif
 211
 212 /*
 213  * putp is special - per documentation it calls tputs with putchar as the
 214  * parameter for outputting characters.  This means that it uses stdio, which
 215  * is not signal-safe.  Applications call this entrypoint; we do not call it
 216  * from within the library.
 217  */
 218 NCURSES_EXPORT(int)
 219 NCURSES_SP_NAME(putp) (NCURSES_SP_DCLx const char *string)
 220 {
 221     return NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
 222                                    string, 1, NCURSES_SP_NAME(_nc_putchar));
 223 }
 224
 225 #if NCURSES_SP_FUNCS
 226 NCURSES_EXPORT(int)
 227 putp(const char *string)
 228 {
 229     return NCURSES_SP_NAME(putp) (CURRENT_SCREEN, string);
 230 }
 231 #endif
 232
 233 /*
 234  * Use these entrypoints rather than "putp" within the library.
 235  */
 236 NCURSES_EXPORT(int)
 237 NCURSES_SP_NAME(_nc_putp) (NCURSES_SP_DCLx
 238                            const char *name GCC_UNUSED,
 239                            const char *string)
 240 {
 241     int rc = ERR;
 242
 243     if (string != 0) {
 244         TPUTS_TRACE(name);
 245         rc = NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
 246                                      string, 1, NCURSES_SP_NAME(_nc_outch));
 247     }
 248     return rc;
 249 }
 250
 251 #if NCURSES_SP_FUNCS
 252 NCURSES_EXPORT(int)
 253 _nc_putp(const char *name, const char *string)
 254 {
 255     return NCURSES_SP_NAME(_nc_putp) (CURRENT_SCREEN, name, string);
 256 }
 257 #endif
 258
 259 NCURSES_EXPORT(int)
 260 NCURSES_SP_NAME(tputs) (NCURSES_SP_DCLx
 261                         const char *string,
 262                         int affcnt,
 263                         NCURSES_SP_OUTC outc)
 264 {
 265     NCURSES_SP_OUTC my_outch = GetOutCh();
 266     bool always_delay;
 267     bool normal_delay;
 268     int number;
 269 #if BSD_TPUTS
 270     int trailpad;
 271 #endif /* BSD_TPUTS */
 272
 273 #ifdef TRACE
 274     char addrbuf[32];
 275
 276     if (USE_TRACEF(TRACE_TPUTS)) {
 277         if (outc == NCURSES_SP_NAME(_nc_outch))
 278             _nc_STRCPY(addrbuf, "_nc_outch", sizeof(addrbuf));
 279         else
 280             _nc_SPRINTF(addrbuf, _nc_SLIMIT(sizeof(addrbuf)) "%p", outc);
 281         if (_nc_tputs_trace) {
 282             _tracef("tputs(%s = %s, %d, %s) called", _nc_tputs_trace,
 283                     _nc_visbuf(string), affcnt, addrbuf);
 284         } else {
 285             _tracef("tputs(%s, %d, %s) called", _nc_visbuf(string), affcnt, addrbuf);
 286         }
 287         TPUTS_TRACE(NULL);
 288         _nc_unlock_global(tracef);
 289     }
 290 #endif /* TRACE */
 291
 292     if (SP_PARM != 0 && !HasTInfoTerminal(SP_PARM))
 293         return ERR;
 294
 295     if (!VALID_STRING(string))
 296         return ERR;
 297
 298     if (
 299 #if NCURSES_SP_FUNCS
 300            (SP_PARM != 0 && SP_PARM->_term == 0)
 301 #else
 302            cur_term == 0
 303 #endif
 304         ) {
 305         always_delay = FALSE;
 306         normal_delay = TRUE;
 307     } else {
 308         always_delay = (string == bell) || (string == flash_screen);
 309         normal_delay =
 310             !xon_xoff
 311             && padding_baud_rate
 312 #if NCURSES_NO_PADDING
 313             && !GetNoPadding(SP_PARM)
 314 #endif
 315             && (_nc_baudrate(ospeed) >= padding_baud_rate);
 316     }
 317
 318 #if BSD_TPUTS
 319     /*
 320      * This ugly kluge deals with the fact that some ancient BSD programs
 321      * (like nethack) actually do the likes of tputs("50") to get delays.
 322      */
 323     trailpad = 0;
 324     if (isdigit(UChar(*string))) {
 325         while (isdigit(UChar(*string))) {
 326             trailpad = trailpad * 10 + (*string - '0');
 327             string++;
 328         }
 329         trailpad *= 10;
 330         if (*string == '.') {
 331             string++;
 332             if (isdigit(UChar(*string))) {
 333                 trailpad += (*string - '0');
 334                 string++;
 335             }
 336             while (isdigit(UChar(*string)))
 337                 string++;
 338         }
 339
 340         if (*string == '*') {
 341             trailpad *= affcnt;
 342             string++;
 343         }
 344     }
 345 #endif /* BSD_TPUTS */
 346
 347     SetOutCh(outc);             /* redirect delay_output() */
 348     while (*string) {
 349         if (*string != '$')
 350             (*outc) (NCURSES_SP_ARGx *string);
 351         else {
 352             string++;
 353             if (*string != '<') {
 354                 (*outc) (NCURSES_SP_ARGx '$');
 355                 if (*string)
 356                     (*outc) (NCURSES_SP_ARGx *string);
 357             } else {
 358                 bool mandatory;
 359
 360                 string++;
 361                 if ((!isdigit(UChar(*string)) && *string != '.')
 362                     || !strchr(string, '>')) {
 363                     (*outc) (NCURSES_SP_ARGx '$');
 364                     (*outc) (NCURSES_SP_ARGx '<');
 365                     continue;
 366                 }
 367
 368                 number = 0;
 369                 while (isdigit(UChar(*string))) {
 370                     number = number * 10 + (*string - '0');
 371                     string++;
 372                 }
 373                 number *= 10;
 374                 if (*string == '.') {
 375                     string++;
 376                     if (isdigit(UChar(*string))) {
 377                         number += (*string - '0');
 378                         string++;
 379                     }
 380                     while (isdigit(UChar(*string)))
 381                         string++;
 382                 }
 383
 384                 mandatory = FALSE;
 385                 while (*string == '*' || *string == '/') {
 386                     if (*string == '*') {
 387                         number *= affcnt;
 388                         string++;
 389                     } else {    /* if (*string == '/') */
 390                         mandatory = TRUE;
 391                         string++;
 392                     }
 393                 }
 394
 395                 if (number > 0
 396                     && (always_delay
 397                         || normal_delay
 398                         || mandatory))
 399                     NCURSES_SP_NAME(delay_output) (NCURSES_SP_ARGx number / 10);
 400
 401             }                   /* endelse (*string == '<') */
 402         }                       /* endelse (*string == '$') */
 403
 404         if (*string == '\0')
 405             break;
 406
 407         string++;
 408     }
 409
 410 #if BSD_TPUTS
 411     /*
 412      * Emit any BSD-style prefix padding that we've accumulated now.
 413      */
 414     if (trailpad > 0
 415         && (always_delay || normal_delay))
 416         delay_output(trailpad / 10);
 417 #endif /* BSD_TPUTS */
 418
 419     SetOutCh(my_outch);
 420     return OK;
 421 }
 422
 423 #if NCURSES_SP_FUNCS
 424 NCURSES_EXPORT(int)
 425 _nc_outc_wrapper(SCREEN *sp, int c)
 426 {
 427     if (0 == sp) {
 428         return (ERR);
 429     } else {
 430         return sp->jump(c);
 431     }
 432 }
 433
 434 NCURSES_EXPORT(int)
 435 tputs(const char *string, int affcnt, int (*outc) (int))
 436 {
 437     SetSafeOutcWrapper(outc);
 438     return NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx string, affcnt, _nc_outc_wrapper);
 439 }
 440 #endif