gdb/cli-out.c

   1 /* Output generating routines for GDB CLI.
   2
   3    Copyright (C) 1999-2018 Free Software Foundation, Inc.
   4
   5    Contributed by Cygnus Solutions.
   6    Written by Fernando Nasser for Cygnus.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "ui-out.h"
  25 #include "cli-out.h"
  26 #include "completer.h"
  27 #include "readline/readline.h"
  28 #include "cli/cli-style.h"
  29
  30 /* These are the CLI output functions */
  31
  32 /* Mark beginning of a table */
  33
  34 void
  35 cli_ui_out::do_table_begin (int nbrofcols, int nr_rows, const char *tblid)
  36 {
  37   if (nr_rows == 0)
  38     m_suppress_output = true;
  39   else
  40     /* Only the table suppresses the output and, fortunately, a table
  41        is not a recursive data structure.  */
  42     gdb_assert (!m_suppress_output);
  43 }
  44
  45 /* Mark beginning of a table body */
  46
  47 void
  48 cli_ui_out::do_table_body ()
  49 {
  50   if (m_suppress_output)
  51     return;
  52
  53   /* first, close the table header line */
  54   text ("\n");
  55 }
  56
  57 /* Mark end of a table */
  58
  59 void
  60 cli_ui_out::do_table_end ()
  61 {
  62   m_suppress_output = false;
  63 }
  64
  65 /* Specify table header */
  66
  67 void
  68 cli_ui_out::do_table_header (int width, ui_align alignment,
  69                              const std::string &col_name,
  70                              const std::string &col_hdr)
  71 {
  72   if (m_suppress_output)
  73     return;
  74
  75   do_field_string (0, width, alignment, 0, col_hdr.c_str (),
  76                    ui_out_style_kind::DEFAULT);
  77 }
  78
  79 /* Mark beginning of a list */
  80
  81 void
  82 cli_ui_out::do_begin (ui_out_type type, const char *id)
  83 {
  84 }
  85
  86 /* Mark end of a list */
  87
  88 void
  89 cli_ui_out::do_end (ui_out_type type)
  90 {
  91 }
  92
  93 /* output an int field */
  94
  95 void
  96 cli_ui_out::do_field_int (int fldno, int width, ui_align alignment,
  97                           const char *fldname, int value)
  98 {
  99   if (m_suppress_output)
 100     return;
 101
 102   std::string str = string_printf ("%d", value);
 103
 104   do_field_string (fldno, width, alignment, fldname, str.c_str (),
 105                    ui_out_style_kind::DEFAULT);
 106 }
 107
 108 /* used to omit a field */
 109
 110 void
 111 cli_ui_out::do_field_skip (int fldno, int width, ui_align alignment,
 112                            const char *fldname)
 113 {
 114   if (m_suppress_output)
 115     return;
 116
 117   do_field_string (fldno, width, alignment, fldname, "",
 118                    ui_out_style_kind::DEFAULT);
 119 }
 120
 121 /* other specific cli_field_* end up here so alignment and field
 122    separators are both handled by cli_field_string */
 123
 124 void
 125 cli_ui_out::do_field_string (int fldno, int width, ui_align align,
 126                              const char *fldname, const char *string,
 127                              ui_out_style_kind style)
 128 {
 129   int before = 0;
 130   int after = 0;
 131
 132   if (m_suppress_output)
 133     return;
 134
 135   if ((align != ui_noalign) && string)
 136     {
 137       before = width - strlen (string);
 138       if (before <= 0)
 139         before = 0;
 140       else
 141         {
 142           if (align == ui_right)
 143             after = 0;
 144           else if (align == ui_left)
 145             {
 146               after = before;
 147               before = 0;
 148             }
 149           else
 150             /* ui_center */
 151             {
 152               after = before / 2;
 153               before -= after;
 154             }
 155         }
 156     }
 157
 158   if (before)
 159     spaces (before);
 160
 161   if (string)
 162     {
 163       ui_file_style fstyle;
 164       switch (style)
 165         {
 166         case ui_out_style_kind::DEFAULT:
 167           /* Nothing.  */
 168           break;
 169         case ui_out_style_kind::FILE:
 170           /* Nothing.  */
 171           fstyle = file_name_style.style ();
 172           break;
 173         case ui_out_style_kind::FUNCTION:
 174           fstyle = function_name_style.style ();
 175           break;
 176         case ui_out_style_kind::VARIABLE:
 177           fstyle = variable_name_style.style ();
 178           break;
 179         default:
 180           gdb_assert_not_reached ("missing case");
 181         }
 182       fputs_styled (string, fstyle, m_streams.back ());
 183     }
 184
 185   if (after)
 186     spaces (after);
 187
 188   if (align != ui_noalign)
 189     field_separator ();
 190 }
 191
 192 /* Output field containing ARGS using printf formatting in FORMAT.  */
 193
 194 void
 195 cli_ui_out::do_field_fmt (int fldno, int width, ui_align align,
 196                           const char *fldname, const char *format,
 197                           va_list args)
 198 {
 199   if (m_suppress_output)
 200     return;
 201
 202   std::string str = string_vprintf (format, args);
 203
 204   do_field_string (fldno, width, align, fldname, str.c_str (),
 205                    ui_out_style_kind::DEFAULT);
 206 }
 207
 208 void
 209 cli_ui_out::do_spaces (int numspaces)
 210 {
 211   if (m_suppress_output)
 212     return;
 213
 214   print_spaces_filtered (numspaces, m_streams.back ());
 215 }
 216
 217 void
 218 cli_ui_out::do_text (const char *string)
 219 {
 220   if (m_suppress_output)
 221     return;
 222
 223   fputs_filtered (string, m_streams.back ());
 224 }
 225
 226 void
 227 cli_ui_out::do_message (const char *format, va_list args)
 228 {
 229   if (m_suppress_output)
 230     return;
 231
 232   vfprintf_unfiltered (m_streams.back (), format, args);
 233 }
 234
 235 void
 236 cli_ui_out::do_wrap_hint (const char *identstring)
 237 {
 238   if (m_suppress_output)
 239     return;
 240
 241   wrap_here (identstring);
 242 }
 243
 244 void
 245 cli_ui_out::do_flush ()
 246 {
 247   gdb_flush (m_streams.back ());
 248 }
 249
 250 /* OUTSTREAM as non-NULL will push OUTSTREAM on the stack of output streams
 251    and make it therefore active.  OUTSTREAM as NULL will pop the last pushed
 252    output stream; it is an internal error if it does not exist.  */
 253
 254 void
 255 cli_ui_out::do_redirect (ui_file *outstream)
 256 {
 257   if (outstream != NULL)
 258     m_streams.push_back (outstream);
 259   else
 260     m_streams.pop_back ();
 261 }
 262
 263 /* local functions */
 264
 265 void
 266 cli_ui_out::field_separator ()
 267 {
 268   fputc_filtered (' ', m_streams.back ());
 269 }
 270
 271 /* Constructor for cli_ui_out.  */
 272
 273 cli_ui_out::cli_ui_out (ui_file *stream, ui_out_flags flags)
 274 : ui_out (flags),
 275   m_suppress_output (false)
 276 {
 277   gdb_assert (stream != NULL);
 278
 279   m_streams.push_back (stream);
 280 }
 281
 282 cli_ui_out::~cli_ui_out ()
 283 {
 284 }
 285
 286 /* Initialize private members at startup.  */
 287
 288 cli_ui_out *
 289 cli_out_new (struct ui_file *stream)
 290 {
 291   return new cli_ui_out (stream, ui_source_list);
 292 }
 293
 294 ui_file *
 295 cli_ui_out::set_stream (struct ui_file *stream)
 296 {
 297   ui_file *old;
 298
 299   old = m_streams.back ();
 300   m_streams.back () = stream;
 301
 302   return old;
 303 }
 304
 305 /* CLI interface to display tab-completion matches.  */
 306
 307 /* CLI version of displayer.crlf.  */
 308
 309 static void
 310 cli_mld_crlf (const struct match_list_displayer *displayer)
 311 {
 312   rl_crlf ();
 313 }
 314
 315 /* CLI version of displayer.putch.  */
 316
 317 static void
 318 cli_mld_putch (const struct match_list_displayer *displayer, int ch)
 319 {
 320   putc (ch, rl_outstream);
 321 }
 322
 323 /* CLI version of displayer.puts.  */
 324
 325 static void
 326 cli_mld_puts (const struct match_list_displayer *displayer, const char *s)
 327 {
 328   fputs (s, rl_outstream);
 329 }
 330
 331 /* CLI version of displayer.flush.  */
 332
 333 static void
 334 cli_mld_flush (const struct match_list_displayer *displayer)
 335 {
 336   fflush (rl_outstream);
 337 }
 338
 339 EXTERN_C void _rl_erase_entire_line (void);
 340
 341 /* CLI version of displayer.erase_entire_line.  */
 342
 343 static void
 344 cli_mld_erase_entire_line (const struct match_list_displayer *displayer)
 345 {
 346   _rl_erase_entire_line ();
 347 }
 348
 349 /* CLI version of displayer.beep.  */
 350
 351 static void
 352 cli_mld_beep (const struct match_list_displayer *displayer)
 353 {
 354   rl_ding ();
 355 }
 356
 357 /* CLI version of displayer.read_key.  */
 358
 359 static int
 360 cli_mld_read_key (const struct match_list_displayer *displayer)
 361 {
 362   return rl_read_key ();
 363 }
 364
 365 /* CLI version of rl_completion_display_matches_hook.
 366    See gdb_display_match_list for a description of the arguments.  */
 367
 368 void
 369 cli_display_match_list (char **matches, int len, int max)
 370 {
 371   struct match_list_displayer displayer;
 372
 373   rl_get_screen_size (&displayer.height, &displayer.width);
 374   displayer.crlf = cli_mld_crlf;
 375   displayer.putch = cli_mld_putch;
 376   displayer.puts = cli_mld_puts;
 377   displayer.flush = cli_mld_flush;
 378   displayer.erase_entire_line = cli_mld_erase_entire_line;
 379   displayer.beep = cli_mld_beep;
 380   displayer.read_key = cli_mld_read_key;
 381
 382   gdb_display_match_list (matches, len, max, &displayer);
 383   rl_forced_update_display ();
 384 }