gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2
   3    Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010,
   4    2011 Free Software Foundation, Inc.
   5
   6    Contributed by Cygnus Solutions.
   7    Written by Fernando Nasser for Cygnus.
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  23
  24 #include "defs.h"
  25 #include "gdb_string.h"
  26 #include "expression.h"         /* For language.h */
  27 #include "language.h"
  28 #include "ui-out.h"
  29 #include "gdb_assert.h"
  30
  31 /* table header structures */
  32
  33 struct ui_out_hdr
  34   {
  35     int colno;
  36     int width;
  37     int alignment;
  38     char *col_name;
  39     char *colhdr;
  40     struct ui_out_hdr *next;
  41   };
  42
  43 /* Maintain a stack so that the info applicable to the inner most list
  44    is always available.  Stack/nested level 0 is reserved for the
  45    top-level result. */
  46
  47 enum { MAX_UI_OUT_LEVELS = 8 };
  48
  49 struct ui_out_level
  50   {
  51     /* Count each field; the first element is for non-list fields */
  52     int field_count;
  53     /* The type of this level. */
  54     enum ui_out_type type;
  55   };
  56
  57 /* Tables are special.  Maintain a separate structure that tracks
  58    their state.  At present an output can only contain a single table
  59    but that restriction might eventually be lifted.  */
  60
  61 struct ui_out_table
  62 {
  63   /* If on, a table is being generated.  */
  64   int flag;
  65
  66   /* If on, the body of a table is being generated.  If off, the table
  67      header is being generated.  */
  68   int body_flag;
  69
  70   /* The level at which each entry of the table is to be found.  A row
  71      (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
  72      above that of the table.  */
  73   int entry_level;
  74
  75   /* Number of table columns (as specified in the table_begin call).  */
  76   int columns;
  77
  78   /* String identifying the table (as specified in the table_begin
  79      call).  */
  80   char *id;
  81
  82   /* Points to the first table header (if any).  */
  83   struct ui_out_hdr *header_first;
  84
  85   /* Points to the last table header (if any).  */
  86   struct ui_out_hdr *header_last;
  87
  88   /* Points to header of NEXT column to format.  */
  89   struct ui_out_hdr *header_next;
  90
  91 };
  92
  93
  94 /* The ui_out structure */
  95 /* Any change here requires a corresponding one in the initialization
  96    of the default uiout, which is statically initialized */
  97
  98 struct ui_out
  99   {
 100     int flags;
 101     /* specific implementation of ui-out */
 102     struct ui_out_impl *impl;
 103     void *data;
 104
 105     /* Sub structure tracking the ui-out depth.  */
 106     int level;
 107     struct ui_out_level levels[MAX_UI_OUT_LEVELS];
 108
 109     /* A table, if any.  At present only a single table is supported.  */
 110     struct ui_out_table table;
 111   };
 112
 113 /* The current (inner most) level. */
 114 static struct ui_out_level *
 115 current_level (struct ui_out *uiout)
 116 {
 117   return &uiout->levels[uiout->level];
 118 }
 119
 120 /* Create a new level, of TYPE.  Return the new level's index. */
 121 static int
 122 push_level (struct ui_out *uiout,
 123             enum ui_out_type type,
 124             const char *id)
 125 {
 126   struct ui_out_level *current;
 127
 128   /* We had better not overflow the buffer. */
 129   uiout->level++;
 130   gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
 131   current = current_level (uiout);
 132   current->field_count = 0;
 133   current->type = type;
 134   return uiout->level;
 135 }
 136
 137 /* Discard the current level, return the discarded level's index.
 138    TYPE is the type of the level being discarded. */
 139 static int
 140 pop_level (struct ui_out *uiout,
 141            enum ui_out_type type)
 142 {
 143   /* We had better not underflow the buffer. */
 144   gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
 145   gdb_assert (current_level (uiout)->type == type);
 146   uiout->level--;
 147   return uiout->level + 1;
 148 }
 149
 150
 151 /* These are the default implementation functions */
 152
 153 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
 154                                  int nr_rows, const char *tblid);
 155 static void default_table_body (struct ui_out *uiout);
 156 static void default_table_end (struct ui_out *uiout);
 157 static void default_table_header (struct ui_out *uiout, int width,
 158                                   enum ui_align alig, const char *col_name,
 159                                   const char *colhdr);
 160 static void default_begin (struct ui_out *uiout,
 161                            enum ui_out_type type,
 162                            int level, const char *id);
 163 static void default_end (struct ui_out *uiout,
 164                          enum ui_out_type type,
 165                          int level);
 166 static void default_field_int (struct ui_out *uiout, int fldno, int width,
 167                                enum ui_align alig,
 168                                const char *fldname,
 169                                int value);
 170 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
 171                                 enum ui_align alig,
 172                                 const char *fldname);
 173 static void default_field_string (struct ui_out *uiout, int fldno, int width,
 174                                   enum ui_align align,
 175                                   const char *fldname,
 176                                   const char *string);
 177 static void default_field_fmt (struct ui_out *uiout, int fldno,
 178                                int width, enum ui_align align,
 179                                const char *fldname,
 180                                const char *format,
 181                                va_list args) ATTRIBUTE_PRINTF (6, 0);
 182 static void default_spaces (struct ui_out *uiout, int numspaces);
 183 static void default_text (struct ui_out *uiout, const char *string);
 184 static void default_message (struct ui_out *uiout, int verbosity,
 185                              const char *format,
 186                              va_list args) ATTRIBUTE_PRINTF (3, 0);
 187 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 188 static void default_flush (struct ui_out *uiout);
 189
 190 /* This is the default ui-out implementation functions vector */
 191
 192 struct ui_out_impl default_ui_out_impl =
 193 {
 194   default_table_begin,
 195   default_table_body,
 196   default_table_end,
 197   default_table_header,
 198   default_begin,
 199   default_end,
 200   default_field_int,
 201   default_field_skip,
 202   default_field_string,
 203   default_field_fmt,
 204   default_spaces,
 205   default_text,
 206   default_message,
 207   default_wrap_hint,
 208   default_flush,
 209   NULL,
 210   0, /* Does not need MI hacks.  */
 211 };
 212
 213 /* The default ui_out */
 214
 215 struct ui_out def_uiout =
 216 {
 217   0,                            /* flags */
 218   &default_ui_out_impl,         /* impl */
 219 };
 220
 221 /* Pointer to current ui_out */
 222 /* FIXME: This should not be a global, but something passed down from main.c
 223    or top.c */
 224
 225 struct ui_out *uiout = &def_uiout;
 226
 227 /* These are the interfaces to implementation functions */
 228
 229 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
 230                             int nr_rows, const char *tblid);
 231 static void uo_table_body (struct ui_out *uiout);
 232 static void uo_table_end (struct ui_out *uiout);
 233 static void uo_table_header (struct ui_out *uiout, int width,
 234                              enum ui_align align, const char *col_name,
 235                              const char *colhdr);
 236 static void uo_begin (struct ui_out *uiout,
 237                       enum ui_out_type type,
 238                       int level, const char *id);
 239 static void uo_end (struct ui_out *uiout,
 240                     enum ui_out_type type,
 241                     int level);
 242 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 243                           enum ui_align align, const char *fldname, int value);
 244 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 245                            enum ui_align align, const char *fldname);
 246 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
 247                           enum ui_align align, const char *fldname,
 248                           const char *format, va_list args)
 249      ATTRIBUTE_PRINTF (6, 0);
 250 static void uo_spaces (struct ui_out *uiout, int numspaces);
 251 static void uo_text (struct ui_out *uiout, const char *string);
 252 static void uo_message (struct ui_out *uiout, int verbosity,
 253                         const char *format, va_list args)
 254      ATTRIBUTE_PRINTF (3, 0);
 255 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 256 static void uo_flush (struct ui_out *uiout);
 257 static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
 258
 259 /* Prototypes for local functions */
 260
 261 extern void _initialize_ui_out (void);
 262 static void append_header_to_list (struct ui_out *uiout, int width,
 263                                    int alignment, const char *col_name,
 264                                    const char *colhdr);
 265 static int get_next_header (struct ui_out *uiout, int *colno, int *width,
 266                             int *alignment, char **colhdr);
 267 static void clear_header_list (struct ui_out *uiout);
 268 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
 269                           int *align);
 270
 271 /* exported functions (ui_out API) */
 272
 273 /* Mark beginning of a table */
 274
 275 static void
 276 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
 277                     int nr_rows,
 278                     const char *tblid)
 279 {
 280   if (uiout->table.flag)
 281     internal_error (__FILE__, __LINE__,
 282                     _("tables cannot be nested; table_begin found before \
 283 previous table_end."));
 284
 285   uiout->table.flag = 1;
 286   uiout->table.body_flag = 0;
 287   uiout->table.entry_level = uiout->level + 1;
 288   uiout->table.columns = nbrofcols;
 289   if (tblid != NULL)
 290     uiout->table.id = xstrdup (tblid);
 291   else
 292     uiout->table.id = NULL;
 293   clear_header_list (uiout);
 294
 295   uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
 296 }
 297
 298 void
 299 ui_out_table_body (struct ui_out *uiout)
 300 {
 301   if (!uiout->table.flag)
 302     internal_error (__FILE__, __LINE__,
 303                     _("table_body outside a table is not valid; it must be \
 304 after a table_begin and before a table_end."));
 305   if (uiout->table.body_flag)
 306     internal_error (__FILE__, __LINE__,
 307                     _("extra table_body call not allowed; there must be \
 308 only one table_body after a table_begin and before a table_end."));
 309   if (uiout->table.header_next->colno != uiout->table.columns)
 310     internal_error (__FILE__, __LINE__,
 311                     _("number of headers differ from number of table \
 312 columns."));
 313
 314   uiout->table.body_flag = 1;
 315   uiout->table.header_next = uiout->table.header_first;
 316
 317   uo_table_body (uiout);
 318 }
 319
 320 static void
 321 ui_out_table_end (struct ui_out *uiout)
 322 {
 323   if (!uiout->table.flag)
 324     internal_error (__FILE__, __LINE__,
 325                     _("misplaced table_end or missing table_begin."));
 326
 327   uiout->table.entry_level = 0;
 328   uiout->table.body_flag = 0;
 329   uiout->table.flag = 0;
 330
 331   uo_table_end (uiout);
 332
 333   if (uiout->table.id)
 334     xfree (uiout->table.id);
 335   clear_header_list (uiout);
 336 }
 337
 338 void
 339 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 340                      const char *col_name,
 341                      const char *colhdr)
 342 {
 343   if (!uiout->table.flag || uiout->table.body_flag)
 344     internal_error (__FILE__, __LINE__,
 345                     _("table header must be specified after table_begin \
 346 and before table_body."));
 347
 348   append_header_to_list (uiout, width, alignment, col_name, colhdr);
 349
 350   uo_table_header (uiout, width, alignment, col_name, colhdr);
 351 }
 352
 353 static void
 354 do_cleanup_table_end (void *data)
 355 {
 356   struct ui_out *ui_out = data;
 357
 358   ui_out_table_end (ui_out);
 359 }
 360
 361 struct cleanup *
 362 make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
 363                                      int nr_rows, const char *tblid)
 364 {
 365   ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
 366   return make_cleanup (do_cleanup_table_end, ui_out);
 367 }
 368
 369 void
 370 ui_out_begin (struct ui_out *uiout,
 371               enum ui_out_type type,
 372               const char *id)
 373 {
 374   int new_level;
 375
 376   if (uiout->table.flag && !uiout->table.body_flag)
 377     internal_error (__FILE__, __LINE__,
 378                     _("table header or table_body expected; lists must be \
 379 specified after table_body."));
 380
 381   /* Be careful to verify the ``field'' before the new tuple/list is
 382      pushed onto the stack.  That way the containing list/table/row is
 383      verified and not the newly created tuple/list.  This verification
 384      is needed (at least) for the case where a table row entry
 385      contains either a tuple/list.  For that case bookkeeping such as
 386      updating the column count or advancing to the next heading still
 387      needs to be performed.  */
 388   {
 389     int fldno;
 390     int width;
 391     int align;
 392
 393     verify_field (uiout, &fldno, &width, &align);
 394   }
 395
 396   new_level = push_level (uiout, type, id);
 397
 398   /* If the push puts us at the same level as a table row entry, we've
 399      got a new table row.  Put the header pointer back to the start.  */
 400   if (uiout->table.body_flag
 401       && uiout->table.entry_level == new_level)
 402     uiout->table.header_next = uiout->table.header_first;
 403
 404   uo_begin (uiout, type, new_level, id);
 405 }
 406
 407 void
 408 ui_out_end (struct ui_out *uiout,
 409             enum ui_out_type type)
 410 {
 411   int old_level = pop_level (uiout, type);
 412
 413   uo_end (uiout, type, old_level);
 414 }
 415
 416 struct ui_out_end_cleanup_data
 417 {
 418   struct ui_out *uiout;
 419   enum ui_out_type type;
 420 };
 421
 422 static void
 423 do_cleanup_end (void *data)
 424 {
 425   struct ui_out_end_cleanup_data *end_cleanup_data = data;
 426
 427   ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
 428   xfree (end_cleanup_data);
 429 }
 430
 431 static struct cleanup *
 432 make_cleanup_ui_out_end (struct ui_out *uiout,
 433                          enum ui_out_type type)
 434 {
 435   struct ui_out_end_cleanup_data *end_cleanup_data;
 436
 437   end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
 438   end_cleanup_data->uiout = uiout;
 439   end_cleanup_data->type = type;
 440   return make_cleanup (do_cleanup_end, end_cleanup_data);
 441 }
 442
 443 struct cleanup *
 444 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 445                                      const char *id)
 446 {
 447   ui_out_begin (uiout, ui_out_type_tuple, id);
 448   return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
 449 }
 450
 451 struct cleanup *
 452 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 453                                     const char *id)
 454 {
 455   ui_out_begin (uiout, ui_out_type_list, id);
 456   return make_cleanup_ui_out_end (uiout, ui_out_type_list);
 457 }
 458
 459 void
 460 ui_out_field_int (struct ui_out *uiout,
 461                   const char *fldname,
 462                   int value)
 463 {
 464   int fldno;
 465   int width;
 466   int align;
 467
 468   verify_field (uiout, &fldno, &width, &align);
 469
 470   uo_field_int (uiout, fldno, width, align, fldname, value);
 471 }
 472
 473 void
 474 ui_out_field_fmt_int (struct ui_out *uiout,
 475                       int input_width,
 476                       enum ui_align input_align,
 477                       const char *fldname,
 478                       int value)
 479 {
 480   int fldno;
 481   int width;
 482   int align;
 483
 484   verify_field (uiout, &fldno, &width, &align);
 485
 486   uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
 487 }
 488
 489 void
 490 ui_out_field_core_addr (struct ui_out *uiout,
 491                         const char *fldname,
 492                         struct gdbarch *gdbarch,
 493                         CORE_ADDR address)
 494 {
 495   char addstr[20];
 496   int addr_bit = gdbarch_addr_bit (gdbarch);
 497
 498   if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
 499     address &= ((CORE_ADDR) 1 << addr_bit) - 1;
 500
 501   /* FIXME: cagney/2002-05-03: Need local_address_string() function
 502      that returns the language localized string formatted to a width
 503      based on gdbarch_addr_bit.  */
 504   if (addr_bit <= 32)
 505     strcpy (addstr, hex_string_custom (address, 8));
 506   else
 507     strcpy (addstr, hex_string_custom (address, 16));
 508
 509   ui_out_field_string (uiout, fldname, addstr);
 510 }
 511
 512 void
 513 ui_out_field_stream (struct ui_out *uiout,
 514                      const char *fldname,
 515                      struct ui_stream *buf)
 516 {
 517   long length;
 518   char *buffer = ui_file_xstrdup (buf->stream, &length);
 519   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 520
 521   if (length > 0)
 522     ui_out_field_string (uiout, fldname, buffer);
 523   else
 524     ui_out_field_skip (uiout, fldname);
 525   ui_file_rewind (buf->stream);
 526   do_cleanups (old_cleanup);
 527 }
 528
 529 /* used to ommit a field */
 530
 531 void
 532 ui_out_field_skip (struct ui_out *uiout,
 533                    const char *fldname)
 534 {
 535   int fldno;
 536   int width;
 537   int align;
 538
 539   verify_field (uiout, &fldno, &width, &align);
 540
 541   uo_field_skip (uiout, fldno, width, align, fldname);
 542 }
 543
 544 void
 545 ui_out_field_string (struct ui_out *uiout,
 546                      const char *fldname,
 547                      const char *string)
 548 {
 549   int fldno;
 550   int width;
 551   int align;
 552
 553   verify_field (uiout, &fldno, &width, &align);
 554
 555   uo_field_string (uiout, fldno, width, align, fldname, string);
 556 }
 557
 558 /* VARARGS */
 559 void
 560 ui_out_field_fmt (struct ui_out *uiout,
 561                   const char *fldname,
 562                   const char *format, ...)
 563 {
 564   va_list args;
 565   int fldno;
 566   int width;
 567   int align;
 568
 569   /* will not align, but has to call anyway */
 570   verify_field (uiout, &fldno, &width, &align);
 571
 572   va_start (args, format);
 573
 574   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 575
 576   va_end (args);
 577 }
 578
 579 void
 580 ui_out_spaces (struct ui_out *uiout, int numspaces)
 581 {
 582   uo_spaces (uiout, numspaces);
 583 }
 584
 585 void
 586 ui_out_text (struct ui_out *uiout,
 587              const char *string)
 588 {
 589   uo_text (uiout, string);
 590 }
 591
 592 void
 593 ui_out_message (struct ui_out *uiout, int verbosity,
 594                 const char *format,...)
 595 {
 596   va_list args;
 597
 598   va_start (args, format);
 599   uo_message (uiout, verbosity, format, args);
 600   va_end (args);
 601 }
 602
 603 struct ui_stream *
 604 ui_out_stream_new (struct ui_out *uiout)
 605 {
 606   struct ui_stream *tempbuf;
 607
 608   tempbuf = XMALLOC (struct ui_stream);
 609   tempbuf->uiout = uiout;
 610   tempbuf->stream = mem_fileopen ();
 611   return tempbuf;
 612 }
 613
 614 void
 615 ui_out_stream_delete (struct ui_stream *buf)
 616 {
 617   ui_file_delete (buf->stream);
 618   xfree (buf);
 619 }
 620
 621 static void
 622 do_stream_delete (void *buf)
 623 {
 624   ui_out_stream_delete (buf);
 625 }
 626
 627 struct cleanup *
 628 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 629 {
 630   return make_cleanup (do_stream_delete, buf);
 631 }
 632
 633
 634 void
 635 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 636 {
 637   uo_wrap_hint (uiout, identstring);
 638 }
 639
 640 void
 641 ui_out_flush (struct ui_out *uiout)
 642 {
 643   uo_flush (uiout);
 644 }
 645
 646 int
 647 ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
 648 {
 649   return uo_redirect (uiout, outstream);
 650 }
 651
 652 /* set the flags specified by the mask given */
 653 int
 654 ui_out_set_flags (struct ui_out *uiout, int mask)
 655 {
 656   int oldflags = uiout->flags;
 657
 658   uiout->flags |= mask;
 659   return oldflags;
 660 }
 661
 662 /* clear the flags specified by the mask given */
 663 int
 664 ui_out_clear_flags (struct ui_out *uiout, int mask)
 665 {
 666   int oldflags = uiout->flags;
 667
 668   uiout->flags &= ~mask;
 669   return oldflags;
 670 }
 671
 672 /* test the flags against the mask given */
 673 int
 674 ui_out_test_flags (struct ui_out *uiout, int mask)
 675 {
 676   return (uiout->flags & mask);
 677 }
 678
 679 /* obtain the current verbosity level (as stablished by the
 680    'set verbositylevel' command */
 681
 682 int
 683 ui_out_get_verblvl (struct ui_out *uiout)
 684 {
 685   /* FIXME: not implemented yet */
 686   return 0;
 687 }
 688
 689 #if 0
 690 void
 691 ui_out_result_begin (struct ui_out *uiout, char *class)
 692 {
 693 }
 694
 695 void
 696 ui_out_result_end (struct ui_out *uiout)
 697 {
 698 }
 699
 700 void
 701 ui_out_info_begin (struct ui_out *uiout, char *class)
 702 {
 703 }
 704
 705 void
 706 ui_out_info_end (struct ui_out *uiout)
 707 {
 708 }
 709
 710 void
 711 ui_out_notify_begin (struct ui_out *uiout, char *class)
 712 {
 713 }
 714
 715 void
 716 ui_out_notify_end (struct ui_out *uiout)
 717 {
 718 }
 719
 720 void
 721 ui_out_error_begin (struct ui_out *uiout, char *class)
 722 {
 723 }
 724
 725 void
 726 ui_out_error_end (struct ui_out *uiout)
 727 {
 728 }
 729 #endif
 730
 731 #if 0
 732 void
 733 gdb_error (ui_out * uiout, int severity, char *format,...)
 734 {
 735   va_list args;
 736 }
 737
 738 void
 739 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 740 {
 741 }
 742 #endif
 743
 744 int
 745 ui_out_is_mi_like_p (struct ui_out *uiout)
 746 {
 747   return uiout->impl->is_mi_like_p;
 748 }
 749
 750 /* default gdb-out hook functions */
 751
 752 static void
 753 default_table_begin (struct ui_out *uiout, int nbrofcols,
 754                      int nr_rows,
 755                      const char *tblid)
 756 {
 757 }
 758
 759 static void
 760 default_table_body (struct ui_out *uiout)
 761 {
 762 }
 763
 764 static void
 765 default_table_end (struct ui_out *uiout)
 766 {
 767 }
 768
 769 static void
 770 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 771                       const char *col_name,
 772                       const char *colhdr)
 773 {
 774 }
 775
 776 static void
 777 default_begin (struct ui_out *uiout,
 778                enum ui_out_type type,
 779                int level,
 780                const char *id)
 781 {
 782 }
 783
 784 static void
 785 default_end (struct ui_out *uiout,
 786              enum ui_out_type type,
 787              int level)
 788 {
 789 }
 790
 791 static void
 792 default_field_int (struct ui_out *uiout, int fldno, int width,
 793                    enum ui_align align,
 794                    const char *fldname, int value)
 795 {
 796 }
 797
 798 static void
 799 default_field_skip (struct ui_out *uiout, int fldno, int width,
 800                     enum ui_align align, const char *fldname)
 801 {
 802 }
 803
 804 static void
 805 default_field_string (struct ui_out *uiout,
 806                       int fldno,
 807                       int width,
 808                       enum ui_align align,
 809                       const char *fldname,
 810                       const char *string)
 811 {
 812 }
 813
 814 static void
 815 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 816                    enum ui_align align,
 817                    const char *fldname,
 818                    const char *format,
 819                    va_list args)
 820 {
 821 }
 822
 823 static void
 824 default_spaces (struct ui_out *uiout, int numspaces)
 825 {
 826 }
 827
 828 static void
 829 default_text (struct ui_out *uiout, const char *string)
 830 {
 831 }
 832
 833 static void
 834 default_message (struct ui_out *uiout, int verbosity,
 835                  const char *format,
 836                  va_list args)
 837 {
 838 }
 839
 840 static void
 841 default_wrap_hint (struct ui_out *uiout, char *identstring)
 842 {
 843 }
 844
 845 static void
 846 default_flush (struct ui_out *uiout)
 847 {
 848 }
 849
 850 /* Interface to the implementation functions */
 851
 852 void
 853 uo_table_begin (struct ui_out *uiout, int nbrofcols,
 854                 int nr_rows,
 855                 const char *tblid)
 856 {
 857   if (!uiout->impl->table_begin)
 858     return;
 859   uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
 860 }
 861
 862 void
 863 uo_table_body (struct ui_out *uiout)
 864 {
 865   if (!uiout->impl->table_body)
 866     return;
 867   uiout->impl->table_body (uiout);
 868 }
 869
 870 void
 871 uo_table_end (struct ui_out *uiout)
 872 {
 873   if (!uiout->impl->table_end)
 874     return;
 875   uiout->impl->table_end (uiout);
 876 }
 877
 878 void
 879 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
 880                  const char *col_name,
 881                  const char *colhdr)
 882 {
 883   if (!uiout->impl->table_header)
 884     return;
 885   uiout->impl->table_header (uiout, width, align, col_name, colhdr);
 886 }
 887
 888 void
 889 uo_begin (struct ui_out *uiout,
 890           enum ui_out_type type,
 891           int level,
 892           const char *id)
 893 {
 894   if (uiout->impl->begin == NULL)
 895     return;
 896   uiout->impl->begin (uiout, type, level, id);
 897 }
 898
 899 void
 900 uo_end (struct ui_out *uiout,
 901         enum ui_out_type type,
 902         int level)
 903 {
 904   if (uiout->impl->end == NULL)
 905     return;
 906   uiout->impl->end (uiout, type, level);
 907 }
 908
 909 void
 910 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 911               const char *fldname,
 912               int value)
 913 {
 914   if (!uiout->impl->field_int)
 915     return;
 916   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 917 }
 918
 919 void
 920 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 921                const char *fldname)
 922 {
 923   if (!uiout->impl->field_skip)
 924     return;
 925   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 926 }
 927
 928 void
 929 uo_field_string (struct ui_out *uiout, int fldno, int width,
 930                  enum ui_align align,
 931                  const char *fldname,
 932                  const char *string)
 933 {
 934   if (!uiout->impl->field_string)
 935     return;
 936   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 937 }
 938
 939 void
 940 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 941               const char *fldname,
 942               const char *format,
 943               va_list args)
 944 {
 945   if (!uiout->impl->field_fmt)
 946     return;
 947   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 948 }
 949
 950 void
 951 uo_spaces (struct ui_out *uiout, int numspaces)
 952 {
 953   if (!uiout->impl->spaces)
 954     return;
 955   uiout->impl->spaces (uiout, numspaces);
 956 }
 957
 958 void
 959 uo_text (struct ui_out *uiout,
 960          const char *string)
 961 {
 962   if (!uiout->impl->text)
 963     return;
 964   uiout->impl->text (uiout, string);
 965 }
 966
 967 void
 968 uo_message (struct ui_out *uiout, int verbosity,
 969             const char *format,
 970             va_list args)
 971 {
 972   if (!uiout->impl->message)
 973     return;
 974   uiout->impl->message (uiout, verbosity, format, args);
 975 }
 976
 977 void
 978 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 979 {
 980   if (!uiout->impl->wrap_hint)
 981     return;
 982   uiout->impl->wrap_hint (uiout, identstring);
 983 }
 984
 985 void
 986 uo_flush (struct ui_out *uiout)
 987 {
 988   if (!uiout->impl->flush)
 989     return;
 990   uiout->impl->flush (uiout);
 991 }
 992
 993 int
 994 uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
 995 {
 996   if (!uiout->impl->redirect)
 997     return -1;
 998   uiout->impl->redirect (uiout, outstream);
 999   return 0;
1000 }
1001
1002 /* local functions */
1003
1004 /* list of column headers manipulation routines */
1005
1006 static void
1007 clear_header_list (struct ui_out *uiout)
1008 {
1009   while (uiout->table.header_first != NULL)
1010     {
1011       uiout->table.header_next = uiout->table.header_first;
1012       uiout->table.header_first = uiout->table.header_first->next;
1013       if (uiout->table.header_next->colhdr != NULL)
1014         xfree (uiout->table.header_next->colhdr);
1015       xfree (uiout->table.header_next);
1016     }
1017   gdb_assert (uiout->table.header_first == NULL);
1018   uiout->table.header_last = NULL;
1019   uiout->table.header_next = NULL;
1020 }
1021
1022 static void
1023 append_header_to_list (struct ui_out *uiout,
1024                        int width,
1025                        int alignment,
1026                        const char *col_name,
1027                        const char *colhdr)
1028 {
1029   struct ui_out_hdr *temphdr;
1030
1031   temphdr = XMALLOC (struct ui_out_hdr);
1032   temphdr->width = width;
1033   temphdr->alignment = alignment;
1034   /* We have to copy the column title as the original may be an
1035      automatic.  */
1036   if (colhdr != NULL)
1037     temphdr->colhdr = xstrdup (colhdr);
1038   else
1039     temphdr->colhdr = NULL;
1040
1041   if (col_name != NULL)
1042     temphdr->col_name = xstrdup (col_name);
1043   else if (colhdr != NULL)
1044     temphdr->col_name = xstrdup (colhdr);
1045   else
1046     temphdr->col_name = NULL;
1047
1048   temphdr->next = NULL;
1049   if (uiout->table.header_first == NULL)
1050     {
1051       temphdr->colno = 1;
1052       uiout->table.header_first = temphdr;
1053       uiout->table.header_last = temphdr;
1054     }
1055   else
1056     {
1057       temphdr->colno = uiout->table.header_last->colno + 1;
1058       uiout->table.header_last->next = temphdr;
1059       uiout->table.header_last = temphdr;
1060     }
1061   uiout->table.header_next = uiout->table.header_last;
1062 }
1063
1064 /* Extract the format information for the NEXT header and and advance
1065    the header pointer.  Return 0 if there was no next header.  */
1066
1067 static int
1068 get_next_header (struct ui_out *uiout,
1069                  int *colno,
1070                  int *width,
1071                  int *alignment,
1072                  char **colhdr)
1073 {
1074   /* There may be no headers at all or we may have used all columns.  */
1075   if (uiout->table.header_next == NULL)
1076     return 0;
1077   *colno = uiout->table.header_next->colno;
1078   *width = uiout->table.header_next->width;
1079   *alignment = uiout->table.header_next->alignment;
1080   *colhdr = uiout->table.header_next->colhdr;
1081   /* Advance the header pointer to the next entry.  */
1082   uiout->table.header_next = uiout->table.header_next->next;
1083   return 1;
1084 }
1085
1086
1087 /* Verify that the field/tuple/list is correctly positioned.  Return
1088    the field number and corresponding alignment (if
1089    available/applicable).  */
1090
1091 static void
1092 verify_field (struct ui_out *uiout, int *fldno, int *width, int *align)
1093 {
1094   struct ui_out_level *current = current_level (uiout);
1095   char *text;
1096
1097   if (uiout->table.flag)
1098     {
1099       if (!uiout->table.body_flag)
1100         internal_error (__FILE__, __LINE__,
1101                         _("table_body missing; table fields must be \
1102 specified after table_body and inside a list."));
1103       /* NOTE: cagney/2001-12-08: There was a check here to ensure
1104          that this code was only executed when uiout->level was
1105          greater than zero.  That no longer applies - this code is run
1106          before each table row tuple is started and at that point the
1107          level is zero.  */
1108     }
1109
1110   current->field_count += 1;
1111
1112   if (uiout->table.body_flag
1113       && uiout->table.entry_level == uiout->level
1114       && get_next_header (uiout, fldno, width, align, &text))
1115     {
1116       if (*fldno != current->field_count)
1117         internal_error (__FILE__, __LINE__,
1118                         _("ui-out internal error in handling headers."));
1119     }
1120   else
1121     {
1122       *width = 0;
1123       *align = ui_noalign;
1124       *fldno = current->field_count;
1125     }
1126 }
1127
1128
1129 /* access to ui_out format private members */
1130
1131 void
1132 ui_out_get_field_separator (struct ui_out *uiout)
1133 {
1134 }
1135
1136 /* Access to ui-out members data */
1137
1138 void *
1139 ui_out_data (struct ui_out *uiout)
1140 {
1141   return uiout->data;
1142 }
1143
1144 /* initalize private members at startup */
1145
1146 struct ui_out *
1147 ui_out_new (struct ui_out_impl *impl, void *data,
1148             int flags)
1149 {
1150   struct ui_out *uiout = XMALLOC (struct ui_out);
1151
1152   uiout->data = data;
1153   uiout->impl = impl;
1154   uiout->flags = flags;
1155   uiout->table.flag = 0;
1156   uiout->table.body_flag = 0;
1157   uiout->level = 0;
1158   memset (uiout->levels, 0, sizeof (uiout->levels));
1159   uiout->table.header_first = NULL;
1160   uiout->table.header_last = NULL;
1161   uiout->table.header_next = NULL;
1162   return uiout;
1163 }
1164
1165 /* standard gdb initialization hook */
1166
1167 void
1168 _initialize_ui_out (void)
1169 {
1170   /* nothing needs to be done */
1171 }