gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2
   3    Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008
   4    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 = 6 };
  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     struct ui_out_data *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   /* We had better not overflow the buffer. */
 128   uiout->level++;
 129   gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
 130   current = current_level (uiout);
 131   current->field_count = 0;
 132   current->type = type;
 133   return uiout->level;
 134 }
 135
 136 /* Discard the current level, return the discarded level's index.
 137    TYPE is the type of the level being discarded. */
 138 static int
 139 pop_level (struct ui_out *uiout,
 140            enum ui_out_type type)
 141 {
 142   /* We had better not underflow the buffer. */
 143   gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
 144   gdb_assert (current_level (uiout)->type == type);
 145   uiout->level--;
 146   return uiout->level + 1;
 147 }
 148
 149
 150 /* These are the default implementation functions */
 151
 152 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
 153                                  int nr_rows, const char *tblid);
 154 static void default_table_body (struct ui_out *uiout);
 155 static void default_table_end (struct ui_out *uiout);
 156 static void default_table_header (struct ui_out *uiout, int width,
 157                                   enum ui_align alig, const char *col_name,
 158                                   const char *colhdr);
 159 static void default_begin (struct ui_out *uiout,
 160                            enum ui_out_type type,
 161                            int level, const char *id);
 162 static void default_end (struct ui_out *uiout,
 163                          enum ui_out_type type,
 164                          int level);
 165 static void default_field_int (struct ui_out *uiout, int fldno, int width,
 166                                enum ui_align alig,
 167                                const char *fldname,
 168                                int value);
 169 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
 170                                 enum ui_align alig,
 171                                 const char *fldname);
 172 static void default_field_string (struct ui_out *uiout, int fldno, int width,
 173                                   enum ui_align align,
 174                                   const char *fldname,
 175                                   const char *string);
 176 static void default_field_fmt (struct ui_out *uiout, int fldno,
 177                                int width, enum ui_align align,
 178                                const char *fldname,
 179                                const char *format,
 180                                va_list args) ATTR_FORMAT (printf, 6, 0);
 181 static void default_spaces (struct ui_out *uiout, int numspaces);
 182 static void default_text (struct ui_out *uiout, const char *string);
 183 static void default_message (struct ui_out *uiout, int verbosity,
 184                              const char *format,
 185                              va_list args) ATTR_FORMAT (printf, 3, 0);
 186 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 187 static void default_flush (struct ui_out *uiout);
 188
 189 /* This is the default ui-out implementation functions vector */
 190
 191 struct ui_out_impl default_ui_out_impl =
 192 {
 193   default_table_begin,
 194   default_table_body,
 195   default_table_end,
 196   default_table_header,
 197   default_begin,
 198   default_end,
 199   default_field_int,
 200   default_field_skip,
 201   default_field_string,
 202   default_field_fmt,
 203   default_spaces,
 204   default_text,
 205   default_message,
 206   default_wrap_hint,
 207   default_flush,
 208   NULL,
 209   0, /* Does not need MI hacks.  */
 210 };
 211
 212 /* The default ui_out */
 213
 214 struct ui_out def_uiout =
 215 {
 216   0,                            /* flags */
 217   &default_ui_out_impl,         /* impl */
 218 };
 219
 220 /* Pointer to current ui_out */
 221 /* FIXME: This should not be a global, but something passed down from main.c
 222    or top.c */
 223
 224 struct ui_out *uiout = &def_uiout;
 225
 226 /* These are the interfaces to implementation functions */
 227
 228 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
 229                             int nr_rows, const char *tblid);
 230 static void uo_table_body (struct ui_out *uiout);
 231 static void uo_table_end (struct ui_out *uiout);
 232 static void uo_table_header (struct ui_out *uiout, int width,
 233                              enum ui_align align, const char *col_name,
 234                              const char *colhdr);
 235 static void uo_begin (struct ui_out *uiout,
 236                       enum ui_out_type type,
 237                       int level, const char *id);
 238 static void uo_end (struct ui_out *uiout,
 239                     enum ui_out_type type,
 240                     int level);
 241 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 242                           enum ui_align align, const char *fldname, int value);
 243 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 244                            enum ui_align align, const char *fldname);
 245 static void uo_field_string (struct ui_out *uiout, int fldno, int width,
 246                              enum ui_align align, const char *fldname,
 247                              const char *string);
 248 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
 249                           enum ui_align align, const char *fldname,
 250                           const char *format, va_list args)
 251      ATTR_FORMAT (printf, 6, 0);
 252 static void uo_spaces (struct ui_out *uiout, int numspaces);
 253 static void uo_text (struct ui_out *uiout, const char *string);
 254 static void uo_message (struct ui_out *uiout, int verbosity,
 255                         const char *format, va_list args)
 256      ATTR_FORMAT (printf, 3, 0);
 257 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 258 static void uo_flush (struct ui_out *uiout);
 259 static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
 260
 261 /* Prototypes for local functions */
 262
 263 extern void _initialize_ui_out (void);
 264 static void append_header_to_list (struct ui_out *uiout, int width,
 265                                    int alignment, const char *col_name,
 266                                    const char *colhdr);
 267 static int get_next_header (struct ui_out *uiout, int *colno, int *width,
 268                             int *alignment, char **colhdr);
 269 static void clear_header_list (struct ui_out *uiout);
 270 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
 271                           int *align);
 272
 273 /* exported functions (ui_out API) */
 274
 275 /* Mark beginning of a table */
 276
 277 static void
 278 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
 279                     int nr_rows,
 280                     const char *tblid)
 281 {
 282   if (uiout->table.flag)
 283     internal_error (__FILE__, __LINE__,
 284                     _("tables cannot be nested; table_begin found before \
 285 previous table_end."));
 286
 287   uiout->table.flag = 1;
 288   uiout->table.body_flag = 0;
 289   uiout->table.entry_level = uiout->level + 1;
 290   uiout->table.columns = nbrofcols;
 291   if (tblid != NULL)
 292     uiout->table.id = xstrdup (tblid);
 293   else
 294     uiout->table.id = NULL;
 295   clear_header_list (uiout);
 296
 297   uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
 298 }
 299
 300 void
 301 ui_out_table_body (struct ui_out *uiout)
 302 {
 303   if (!uiout->table.flag)
 304     internal_error (__FILE__, __LINE__,
 305                     _("table_body outside a table is not valid; it must be \
 306 after a table_begin and before a table_end."));
 307   if (uiout->table.body_flag)
 308     internal_error (__FILE__, __LINE__,
 309                     _("extra table_body call not allowed; there must be \
 310 only one table_body after a table_begin and before a table_end."));
 311   if (uiout->table.header_next->colno != uiout->table.columns)
 312     internal_error (__FILE__, __LINE__,
 313                     _("number of headers differ from number of table \
 314 columns."));
 315
 316   uiout->table.body_flag = 1;
 317   uiout->table.header_next = uiout->table.header_first;
 318
 319   uo_table_body (uiout);
 320 }
 321
 322 static void
 323 ui_out_table_end (struct ui_out *uiout)
 324 {
 325   if (!uiout->table.flag)
 326     internal_error (__FILE__, __LINE__,
 327                     _("misplaced table_end or missing table_begin."));
 328
 329   uiout->table.entry_level = 0;
 330   uiout->table.body_flag = 0;
 331   uiout->table.flag = 0;
 332
 333   uo_table_end (uiout);
 334
 335   if (uiout->table.id)
 336     xfree (uiout->table.id);
 337   clear_header_list (uiout);
 338 }
 339
 340 void
 341 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 342                      const char *col_name,
 343                      const char *colhdr)
 344 {
 345   if (!uiout->table.flag || uiout->table.body_flag)
 346     internal_error (__FILE__, __LINE__,
 347                     _("table header must be specified after table_begin \
 348 and before table_body."));
 349
 350   append_header_to_list (uiout, width, alignment, col_name, colhdr);
 351
 352   uo_table_header (uiout, width, alignment, col_name, colhdr);
 353 }
 354
 355 static void
 356 do_cleanup_table_end (void *data)
 357 {
 358   struct ui_out *ui_out = data;
 359
 360   ui_out_table_end (ui_out);
 361 }
 362
 363 struct cleanup *
 364 make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
 365                                      int nr_rows, const char *tblid)
 366 {
 367   ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
 368   return make_cleanup (do_cleanup_table_end, ui_out);
 369 }
 370
 371 void
 372 ui_out_begin (struct ui_out *uiout,
 373               enum ui_out_type type,
 374               const char *id)
 375 {
 376   int new_level;
 377   if (uiout->table.flag && !uiout->table.body_flag)
 378     internal_error (__FILE__, __LINE__,
 379                     _("table header or table_body expected; lists must be \
 380 specified after table_body."));
 381
 382   /* Be careful to verify the ``field'' before the new tuple/list is
 383      pushed onto the stack.  That way the containing list/table/row is
 384      verified and not the newly created tuple/list.  This verification
 385      is needed (at least) for the case where a table row entry
 386      contains either a tuple/list.  For that case bookkeeping such as
 387      updating the column count or advancing to the next heading still
 388      needs to be performed.  */
 389   {
 390     int fldno;
 391     int width;
 392     int align;
 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   uo_end (uiout, type, old_level);
 413 }
 414
 415 struct ui_out_end_cleanup_data
 416 {
 417   struct ui_out *uiout;
 418   enum ui_out_type type;
 419 };
 420
 421 static void
 422 do_cleanup_end (void *data)
 423 {
 424   struct ui_out_end_cleanup_data *end_cleanup_data = data;
 425   ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
 426   xfree (end_cleanup_data);
 427 }
 428
 429 static struct cleanup *
 430 make_cleanup_ui_out_end (struct ui_out *uiout,
 431                          enum ui_out_type type)
 432 {
 433   struct ui_out_end_cleanup_data *end_cleanup_data;
 434   end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
 435   end_cleanup_data->uiout = uiout;
 436   end_cleanup_data->type = type;
 437   return make_cleanup (do_cleanup_end, end_cleanup_data);
 438 }
 439
 440 struct cleanup *
 441 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 442                                      const char *id)
 443 {
 444   ui_out_begin (uiout, ui_out_type_tuple, id);
 445   return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
 446 }
 447
 448 struct cleanup *
 449 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 450                                     const char *id)
 451 {
 452   ui_out_begin (uiout, ui_out_type_list, id);
 453   return make_cleanup_ui_out_end (uiout, ui_out_type_list);
 454 }
 455
 456 void
 457 ui_out_field_int (struct ui_out *uiout,
 458                   const char *fldname,
 459                   int value)
 460 {
 461   int fldno;
 462   int width;
 463   int align;
 464   struct ui_out_level *current = current_level (uiout);
 465
 466   verify_field (uiout, &fldno, &width, &align);
 467
 468   uo_field_int (uiout, fldno, width, align, fldname, value);
 469 }
 470
 471 void
 472 ui_out_field_fmt_int (struct ui_out *uiout,
 473                       int input_width,
 474                       enum ui_align input_align,
 475                       const char *fldname,
 476                       int value)
 477 {
 478   int fldno;
 479   int width;
 480   int align;
 481   struct ui_out_level *current = current_level (uiout);
 482
 483   verify_field (uiout, &fldno, &width, &align);
 484
 485   uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
 486 }
 487
 488 void
 489 ui_out_field_core_addr (struct ui_out *uiout,
 490                         const char *fldname,
 491                         CORE_ADDR address)
 492 {
 493   char addstr[20];
 494   int addr_bit = gdbarch_addr_bit (current_gdbarch);
 495
 496   if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
 497     address &= ((CORE_ADDR) 1 << addr_bit) - 1;
 498
 499   /* FIXME: cagney/2002-05-03: Need local_address_string() function
 500      that returns the language localized string formatted to a width
 501      based on gdbarch_addr_bit.  */
 502   if (addr_bit <= 32)
 503     strcpy (addstr, hex_string_custom (address, 8));
 504   else
 505     strcpy (addstr, hex_string_custom (address, 16));
 506
 507   ui_out_field_string (uiout, fldname, addstr);
 508 }
 509
 510 void
 511 ui_out_field_stream (struct ui_out *uiout,
 512                      const char *fldname,
 513                      struct ui_stream *buf)
 514 {
 515   long length;
 516   char *buffer = ui_file_xstrdup (buf->stream, &length);
 517   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 518   if (length > 0)
 519     ui_out_field_string (uiout, fldname, buffer);
 520   else
 521     ui_out_field_skip (uiout, fldname);
 522   ui_file_rewind (buf->stream);
 523   do_cleanups (old_cleanup);
 524 }
 525
 526 /* used to ommit a field */
 527
 528 void
 529 ui_out_field_skip (struct ui_out *uiout,
 530                    const char *fldname)
 531 {
 532   int fldno;
 533   int width;
 534   int align;
 535
 536   verify_field (uiout, &fldno, &width, &align);
 537
 538   uo_field_skip (uiout, fldno, width, align, fldname);
 539 }
 540
 541 void
 542 ui_out_field_string (struct ui_out *uiout,
 543                      const char *fldname,
 544                      const char *string)
 545 {
 546   int fldno;
 547   int width;
 548   int align;
 549
 550   verify_field (uiout, &fldno, &width, &align);
 551
 552   uo_field_string (uiout, fldno, width, align, fldname, string);
 553 }
 554
 555 /* VARARGS */
 556 void
 557 ui_out_field_fmt (struct ui_out *uiout,
 558                   const char *fldname,
 559                   const char *format, ...)
 560 {
 561   va_list args;
 562   int fldno;
 563   int width;
 564   int align;
 565
 566   /* will not align, but has to call anyway */
 567   verify_field (uiout, &fldno, &width, &align);
 568
 569   va_start (args, format);
 570
 571   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 572
 573   va_end (args);
 574 }
 575
 576 void
 577 ui_out_spaces (struct ui_out *uiout, int numspaces)
 578 {
 579   uo_spaces (uiout, numspaces);
 580 }
 581
 582 void
 583 ui_out_text (struct ui_out *uiout,
 584              const char *string)
 585 {
 586   uo_text (uiout, string);
 587 }
 588
 589 void
 590 ui_out_message (struct ui_out *uiout, int verbosity,
 591                 const char *format,...)
 592 {
 593   va_list args;
 594
 595   va_start (args, format);
 596
 597   uo_message (uiout, verbosity, format, args);
 598
 599   va_end (args);
 600 }
 601
 602 struct ui_stream *
 603 ui_out_stream_new (struct ui_out *uiout)
 604 {
 605   struct ui_stream *tempbuf;
 606
 607   tempbuf = XMALLOC (struct ui_stream);
 608   tempbuf->uiout = uiout;
 609   tempbuf->stream = mem_fileopen ();
 610   return tempbuf;
 611 }
 612
 613 void
 614 ui_out_stream_delete (struct ui_stream *buf)
 615 {
 616   ui_file_delete (buf->stream);
 617   xfree (buf);
 618 }
 619
 620 static void
 621 do_stream_delete (void *buf)
 622 {
 623   ui_out_stream_delete (buf);
 624 }
 625
 626 struct cleanup *
 627 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 628 {
 629   return make_cleanup (do_stream_delete, buf);
 630 }
 631
 632
 633 void
 634 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 635 {
 636   uo_wrap_hint (uiout, identstring);
 637 }
 638
 639 void
 640 ui_out_flush (struct ui_out *uiout)
 641 {
 642   uo_flush (uiout);
 643 }
 644
 645 int
 646 ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
 647 {
 648   return uo_redirect (uiout, outstream);
 649 }
 650
 651 /* set the flags specified by the mask given */
 652 int
 653 ui_out_set_flags (struct ui_out *uiout, int mask)
 654 {
 655   int oldflags = uiout->flags;
 656
 657   uiout->flags |= mask;
 658
 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
 670   return oldflags;
 671 }
 672
 673 /* test the flags against the mask given */
 674 int
 675 ui_out_test_flags (struct ui_out *uiout, int mask)
 676 {
 677   return (uiout->flags & mask);
 678 }
 679
 680 /* obtain the current verbosity level (as stablished by the
 681    'set verbositylevel' command */
 682
 683 int
 684 ui_out_get_verblvl (struct ui_out *uiout)
 685 {
 686   /* FIXME: not implemented yet */
 687   return 0;
 688 }
 689
 690 #if 0
 691 void
 692 ui_out_result_begin (struct ui_out *uiout, char *class)
 693 {
 694 }
 695
 696 void
 697 ui_out_result_end (struct ui_out *uiout)
 698 {
 699 }
 700
 701 void
 702 ui_out_info_begin (struct ui_out *uiout, char *class)
 703 {
 704 }
 705
 706 void
 707 ui_out_info_end (struct ui_out *uiout)
 708 {
 709 }
 710
 711 void
 712 ui_out_notify_begin (struct ui_out *uiout, char *class)
 713 {
 714 }
 715
 716 void
 717 ui_out_notify_end (struct ui_out *uiout)
 718 {
 719 }
 720
 721 void
 722 ui_out_error_begin (struct ui_out *uiout, char *class)
 723 {
 724 }
 725
 726 void
 727 ui_out_error_end (struct ui_out *uiout)
 728 {
 729 }
 730 #endif
 731
 732 #if 0
 733 void
 734 gdb_error (ui_out * uiout, int severity, char *format,...)
 735 {
 736   va_list args;
 737 }
 738
 739 void
 740 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 741 {
 742 }
 743 #endif
 744
 745 int
 746 ui_out_is_mi_like_p (struct ui_out *uiout)
 747 {
 748   return uiout->impl->is_mi_like_p;
 749 }
 750
 751 /* default gdb-out hook functions */
 752
 753 static void
 754 default_table_begin (struct ui_out *uiout, int nbrofcols,
 755                      int nr_rows,
 756                      const char *tblid)
 757 {
 758 }
 759
 760 static void
 761 default_table_body (struct ui_out *uiout)
 762 {
 763 }
 764
 765 static void
 766 default_table_end (struct ui_out *uiout)
 767 {
 768 }
 769
 770 static void
 771 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 772                       const char *col_name,
 773                       const char *colhdr)
 774 {
 775 }
 776
 777 static void
 778 default_begin (struct ui_out *uiout,
 779                enum ui_out_type type,
 780                int level,
 781                const char *id)
 782 {
 783 }
 784
 785 static void
 786 default_end (struct ui_out *uiout,
 787              enum ui_out_type type,
 788              int level)
 789 {
 790 }
 791
 792 static void
 793 default_field_int (struct ui_out *uiout, int fldno, int width,
 794                    enum ui_align align,
 795                    const char *fldname, int value)
 796 {
 797 }
 798
 799 static void
 800 default_field_skip (struct ui_out *uiout, int fldno, int width,
 801                     enum ui_align align, const char *fldname)
 802 {
 803 }
 804
 805 static void
 806 default_field_string (struct ui_out *uiout,
 807                       int fldno,
 808                       int width,
 809                       enum ui_align align,
 810                       const char *fldname,
 811                       const char *string)
 812 {
 813 }
 814
 815 static void
 816 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 817                    enum ui_align align,
 818                    const char *fldname,
 819                    const char *format,
 820                    va_list args)
 821 {
 822 }
 823
 824 static void
 825 default_spaces (struct ui_out *uiout, int numspaces)
 826 {
 827 }
 828
 829 static void
 830 default_text (struct ui_out *uiout, const char *string)
 831 {
 832 }
 833
 834 static void
 835 default_message (struct ui_out *uiout, int verbosity,
 836                  const char *format,
 837                  va_list args)
 838 {
 839 }
 840
 841 static void
 842 default_wrap_hint (struct ui_out *uiout, char *identstring)
 843 {
 844 }
 845
 846 static void
 847 default_flush (struct ui_out *uiout)
 848 {
 849 }
 850
 851 /* Interface to the implementation functions */
 852
 853 void
 854 uo_table_begin (struct ui_out *uiout, int nbrofcols,
 855                 int nr_rows,
 856                 const char *tblid)
 857 {
 858   if (!uiout->impl->table_begin)
 859     return;
 860   uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
 861 }
 862
 863 void
 864 uo_table_body (struct ui_out *uiout)
 865 {
 866   if (!uiout->impl->table_body)
 867     return;
 868   uiout->impl->table_body (uiout);
 869 }
 870
 871 void
 872 uo_table_end (struct ui_out *uiout)
 873 {
 874   if (!uiout->impl->table_end)
 875     return;
 876   uiout->impl->table_end (uiout);
 877 }
 878
 879 void
 880 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
 881                  const char *col_name,
 882                  const char *colhdr)
 883 {
 884   if (!uiout->impl->table_header)
 885     return;
 886   uiout->impl->table_header (uiout, width, align, col_name, colhdr);
 887 }
 888
 889 void
 890 uo_begin (struct ui_out *uiout,
 891           enum ui_out_type type,
 892           int level,
 893           const char *id)
 894 {
 895   if (uiout->impl->begin == NULL)
 896     return;
 897   uiout->impl->begin (uiout, type, level, id);
 898 }
 899
 900 void
 901 uo_end (struct ui_out *uiout,
 902         enum ui_out_type type,
 903         int level)
 904 {
 905   if (uiout->impl->end == NULL)
 906     return;
 907   uiout->impl->end (uiout, type, level);
 908 }
 909
 910 void
 911 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 912               const char *fldname,
 913               int value)
 914 {
 915   if (!uiout->impl->field_int)
 916     return;
 917   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 918 }
 919
 920 void
 921 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 922                const char *fldname)
 923 {
 924   if (!uiout->impl->field_skip)
 925     return;
 926   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 927 }
 928
 929 void
 930 uo_field_string (struct ui_out *uiout, int fldno, int width,
 931                  enum ui_align align,
 932                  const char *fldname,
 933                  const char *string)
 934 {
 935   if (!uiout->impl->field_string)
 936     return;
 937   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 938 }
 939
 940 void
 941 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 942               const char *fldname,
 943               const char *format,
 944               va_list args)
 945 {
 946   if (!uiout->impl->field_fmt)
 947     return;
 948   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 949 }
 950
 951 void
 952 uo_spaces (struct ui_out *uiout, int numspaces)
 953 {
 954   if (!uiout->impl->spaces)
 955     return;
 956   uiout->impl->spaces (uiout, numspaces);
 957 }
 958
 959 void
 960 uo_text (struct ui_out *uiout,
 961          const char *string)
 962 {
 963   if (!uiout->impl->text)
 964     return;
 965   uiout->impl->text (uiout, string);
 966 }
 967
 968 void
 969 uo_message (struct ui_out *uiout, int verbosity,
 970             const char *format,
 971             va_list args)
 972 {
 973   if (!uiout->impl->message)
 974     return;
 975   uiout->impl->message (uiout, verbosity, format, args);
 976 }
 977
 978 void
 979 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 980 {
 981   if (!uiout->impl->wrap_hint)
 982     return;
 983   uiout->impl->wrap_hint (uiout, identstring);
 984 }
 985
 986 void
 987 uo_flush (struct ui_out *uiout)
 988 {
 989   if (!uiout->impl->flush)
 990     return;
 991   uiout->impl->flush (uiout);
 992 }
 993
 994 int
 995 uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
 996 {
 997   if (!uiout->impl->redirect)
 998     return -1;
 999   uiout->impl->redirect (uiout, outstream);
1000   return 0;
1001 }
1002
1003 /* local functions */
1004
1005 /* list of column headers manipulation routines */
1006
1007 static void
1008 clear_header_list (struct ui_out *uiout)
1009 {
1010   while (uiout->table.header_first != NULL)
1011     {
1012       uiout->table.header_next = uiout->table.header_first;
1013       uiout->table.header_first = uiout->table.header_first->next;
1014       if (uiout->table.header_next->colhdr != NULL)
1015         xfree (uiout->table.header_next->colhdr);
1016       xfree (uiout->table.header_next);
1017     }
1018   gdb_assert (uiout->table.header_first == NULL);
1019   uiout->table.header_last = NULL;
1020   uiout->table.header_next = NULL;
1021 }
1022
1023 static void
1024 append_header_to_list (struct ui_out *uiout,
1025                        int width,
1026                        int alignment,
1027                        const char *col_name,
1028                        const char *colhdr)
1029 {
1030   struct ui_out_hdr *temphdr;
1031
1032   temphdr = XMALLOC (struct ui_out_hdr);
1033   temphdr->width = width;
1034   temphdr->alignment = alignment;
1035   /* We have to copy the column title as the original may be an
1036      automatic.  */
1037   if (colhdr != NULL)
1038     temphdr->colhdr = xstrdup (colhdr);
1039   else
1040     temphdr->colhdr = NULL;
1041
1042   if (col_name != NULL)
1043     temphdr->col_name = xstrdup (col_name);
1044   else if (colhdr != NULL)
1045     temphdr->col_name = xstrdup (colhdr);
1046   else
1047     temphdr->col_name = NULL;
1048
1049   temphdr->next = NULL;
1050   if (uiout->table.header_first == NULL)
1051     {
1052       temphdr->colno = 1;
1053       uiout->table.header_first = temphdr;
1054       uiout->table.header_last = temphdr;
1055     }
1056   else
1057     {
1058       temphdr->colno = uiout->table.header_last->colno + 1;
1059       uiout->table.header_last->next = temphdr;
1060       uiout->table.header_last = temphdr;
1061     }
1062   uiout->table.header_next = uiout->table.header_last;
1063 }
1064
1065 /* Extract the format information for the NEXT header and and advance
1066    the header pointer.  Return 0 if there was no next header.  */
1067
1068 static int
1069 get_next_header (struct ui_out *uiout,
1070                  int *colno,
1071                  int *width,
1072                  int *alignment,
1073                  char **colhdr)
1074 {
1075   /* There may be no headers at all or we may have used all columns.  */
1076   if (uiout->table.header_next == NULL)
1077     return 0;
1078   *colno = uiout->table.header_next->colno;
1079   *width = uiout->table.header_next->width;
1080   *alignment = uiout->table.header_next->alignment;
1081   *colhdr = uiout->table.header_next->colhdr;
1082   /* Advance the header pointer to the next entry.  */
1083   uiout->table.header_next = uiout->table.header_next->next;
1084   return 1;
1085 }
1086
1087
1088 /* Verify that the field/tuple/list is correctly positioned.  Return
1089    the field number and corresponding alignment (if
1090    available/applicable).  */
1091
1092 static void
1093 verify_field (struct ui_out *uiout, int *fldno, int *width, int *align)
1094 {
1095   struct ui_out_level *current = current_level (uiout);
1096   char *text;
1097
1098   if (uiout->table.flag)
1099     {
1100       if (!uiout->table.body_flag)
1101         internal_error (__FILE__, __LINE__,
1102                         _("table_body missing; table fields must be \
1103 specified after table_body and inside a list."));
1104       /* NOTE: cagney/2001-12-08: There was a check here to ensure
1105          that this code was only executed when uiout->level was
1106          greater than zero.  That no longer applies - this code is run
1107          before each table row tuple is started and at that point the
1108          level is zero.  */
1109     }
1110
1111   current->field_count += 1;
1112
1113   if (uiout->table.body_flag
1114       && uiout->table.entry_level == uiout->level
1115       && get_next_header (uiout, fldno, width, align, &text))
1116     {
1117       if (*fldno != current->field_count)
1118         internal_error (__FILE__, __LINE__,
1119                         _("ui-out internal error in handling headers."));
1120     }
1121   else
1122     {
1123       *width = 0;
1124       *align = ui_noalign;
1125       *fldno = current->field_count;
1126     }
1127 }
1128
1129
1130 /* access to ui_out format private members */
1131
1132 void
1133 ui_out_get_field_separator (struct ui_out *uiout)
1134 {
1135 }
1136
1137 /* Access to ui-out members data */
1138
1139 struct ui_out_data *
1140 ui_out_data (struct ui_out *uiout)
1141 {
1142   return uiout->data;
1143 }
1144
1145 /* initalize private members at startup */
1146
1147 struct ui_out *
1148 ui_out_new (struct ui_out_impl *impl,
1149             struct ui_out_data *data,
1150             int flags)
1151 {
1152   struct ui_out *uiout = XMALLOC (struct ui_out);
1153   uiout->data = data;
1154   uiout->impl = impl;
1155   uiout->flags = flags;
1156   uiout->table.flag = 0;
1157   uiout->table.body_flag = 0;
1158   uiout->level = 0;
1159   memset (uiout->levels, 0, sizeof (uiout->levels));
1160   uiout->table.header_first = NULL;
1161   uiout->table.header_last = NULL;
1162   uiout->table.header_next = NULL;
1163   return uiout;
1164 }
1165
1166 /* standard gdb initialization hook */
1167
1168 void
1169 _initialize_ui_out (void)
1170 {
1171   /* nothing needs to be done */
1172 }