gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2    Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4    Written by Fernando Nasser for Cygnus.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "gdb_string.h"
  25 #include "expression.h"         /* For language.h */
  26 #include "language.h"
  27 #include "ui-out.h"
  28 #include "gdb_assert.h"
  29
  30 /* Convenience macro for allocting typesafe memory. */
  31
  32 #undef XMALLOC
  33 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  34
  35 /* table header structures */
  36
  37 struct ui_out_hdr
  38   {
  39     int colno;
  40     int width;
  41     int alignment;
  42     char *colhdr;
  43     struct ui_out_hdr *next;
  44   };
  45
  46 /* Maintain a stack so that the info applicable to the inner most list
  47    is always available.  Stack/nested level 0 is reserved for the
  48    top-level result. */
  49
  50 enum { MAX_UI_OUT_LEVELS = 5 };
  51
  52 struct ui_out_level
  53   {
  54     /* Count each field; the first element is for non-list fields */
  55     int field_count;
  56     /* The type of this level. */
  57     enum ui_out_type type;
  58   };
  59
  60 /* The ui_out structure */
  61 /* Any change here requires a corresponding one in the initialization
  62    of the default uiout, which is statically initialized */
  63
  64 struct ui_out
  65   {
  66     int flags;
  67     /* specific implementation of ui-out */
  68     struct ui_out_impl *impl;
  69     struct ui_out_data *data;
  70
  71     /* if on, a table is being generated */
  72     int table_flag;
  73
  74     /* if on, the body of a table is being generated */
  75     int body_flag;
  76
  77     /* number of table columns (as specified in the table_begin call) */
  78     int table_columns;
  79
  80     /* strinf identifying the table (as specified in the table_begin call) */
  81     char *table_id;
  82
  83     /* Sub structure tracking the table depth. */
  84     int level;
  85     struct ui_out_level levels[MAX_UI_OUT_LEVELS];
  86
  87     /* points to the first header (if any) */
  88     struct ui_out_hdr *headerfirst;
  89
  90     /* points to the last header (if any) */
  91     struct ui_out_hdr *headerlast;
  92
  93     /* points to header of next column to format */
  94     struct ui_out_hdr *headercurr;
  95
  96   };
  97
  98 /* The current (inner most) level. */
  99 static struct ui_out_level *
 100 current_level (struct ui_out *uiout)
 101 {
 102   return &uiout->levels[uiout->level];
 103 }
 104
 105 /* Create a new level, of TYPE.  Return the new level's index. */
 106 static int
 107 push_level (struct ui_out *uiout,
 108             enum ui_out_type type,
 109             const char *id)
 110 {
 111   struct ui_out_level *current;
 112   /* We had better not overflow the buffer. */
 113   uiout->level++;
 114   gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
 115   current = current_level (uiout);
 116   current->field_count = 0;
 117   current->type = type;
 118   return uiout->level;
 119 }
 120
 121 /* Discard the current level, return the discarded level's index.
 122    TYPE is the type of the level being discarded. */
 123 static int
 124 pop_level (struct ui_out *uiout,
 125            enum ui_out_type type)
 126 {
 127   /* We had better not underflow the buffer. */
 128   gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
 129   gdb_assert (current_level (uiout)->type == type);
 130   uiout->level--;
 131   return uiout->level + 1;
 132 }
 133
 134
 135 /* These are the default implementation functions */
 136
 137 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
 138                                  const char *tblid);
 139 static void default_table_body (struct ui_out *uiout);
 140 static void default_table_end (struct ui_out *uiout);
 141 static void default_table_header (struct ui_out *uiout, int width,
 142                                   enum ui_align alig,
 143                                   const char *colhdr);
 144 static void default_begin (struct ui_out *uiout,
 145                            enum ui_out_type type,
 146                            int level, const char *id);
 147 static void default_end (struct ui_out *uiout,
 148                          enum ui_out_type type,
 149                          int level);
 150 static void default_field_int (struct ui_out *uiout, int fldno, int width,
 151                                enum ui_align alig,
 152                                const char *fldname,
 153                                int value);
 154 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
 155                                 enum ui_align alig,
 156                                 const char *fldname);
 157 static void default_field_string (struct ui_out *uiout, int fldno, int width,
 158                                   enum ui_align align,
 159                                   const char *fldname,
 160                                   const char *string);
 161 static void default_field_fmt (struct ui_out *uiout, int fldno,
 162                                int width, enum ui_align align,
 163                                const char *fldname,
 164                                const char *format,
 165                                va_list args);
 166 static void default_spaces (struct ui_out *uiout, int numspaces);
 167 static void default_text (struct ui_out *uiout, const char *string);
 168 static void default_message (struct ui_out *uiout, int verbosity,
 169                              const char *format,
 170                              va_list args);
 171 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 172 static void default_flush (struct ui_out *uiout);
 173
 174 /* This is the default ui-out implementation functions vector */
 175
 176 struct ui_out_impl default_ui_out_impl =
 177 {
 178   default_table_begin,
 179   default_table_body,
 180   default_table_end,
 181   default_table_header,
 182   default_begin,
 183   default_end,
 184   default_field_int,
 185   default_field_skip,
 186   default_field_string,
 187   default_field_fmt,
 188   default_spaces,
 189   default_text,
 190   default_message,
 191   default_wrap_hint,
 192   default_flush
 193 };
 194
 195 /* The default ui_out */
 196
 197 struct ui_out def_uiout =
 198 {
 199   0,                            /* flags */
 200   &default_ui_out_impl,         /* impl */
 201 };
 202
 203 /* Pointer to current ui_out */
 204 /* FIXME: This should not be a global, but something passed down from main.c
 205    or top.c */
 206
 207 struct ui_out *uiout = &def_uiout;
 208
 209 /* These are the interfaces to implementation functions */
 210
 211 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
 212                             const char *tblid);
 213 static void uo_table_body (struct ui_out *uiout);
 214 static void uo_table_end (struct ui_out *uiout);
 215 static void uo_table_header (struct ui_out *uiout, int width,
 216                              enum ui_align align, const char *colhdr);
 217 static void uo_begin (struct ui_out *uiout,
 218                       enum ui_out_type type,
 219                       int level, const char *id);
 220 static void uo_end (struct ui_out *uiout,
 221                     enum ui_out_type type,
 222                     int level);
 223 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 224                           enum ui_align align, const char *fldname, int value);
 225 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 226                            enum ui_align align, const char *fldname);
 227 static void uo_field_string (struct ui_out *uiout, int fldno, int width,
 228                              enum ui_align align, const char *fldname,
 229                              const char *string);
 230 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
 231                           enum ui_align align, const char *fldname,
 232                           const char *format, va_list args);
 233 static void uo_spaces (struct ui_out *uiout, int numspaces);
 234 static void uo_text (struct ui_out *uiout, const char *string);
 235 static void uo_message (struct ui_out *uiout, int verbosity,
 236                         const char *format, va_list args);
 237 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 238 static void uo_flush (struct ui_out *uiout);
 239
 240 /* Prototypes for local functions */
 241
 242 extern void _initialize_ui_out (void);
 243 static void append_header_to_list (struct ui_out *uiout, int width,
 244                                    int alignment, const char *colhdr);
 245 static int get_curr_header (struct ui_out *uiout, int *colno, int *width,
 246                             int *alignment, char **colhdr);
 247 static void clear_header_list (struct ui_out *uiout);
 248 static void verify_field_proper_position (struct ui_out *uiout);
 249 static void verify_field_alignment (struct ui_out *uiout, int fldno, int *width, int *alignment);
 250
 251 static void init_ui_out_state (struct ui_out *uiout);
 252
 253 /* exported functions (ui_out API) */
 254
 255 /* Mark beginning of a table */
 256
 257 void
 258 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
 259                     const char *tblid)
 260 {
 261   if (uiout->table_flag)
 262     internal_error (__FILE__, __LINE__,
 263                     "tables cannot be nested; table_begin found before \
 264 previous table_end.");
 265
 266   uiout->table_flag = 1;
 267   uiout->table_columns = nbrofcols;
 268   if (tblid != NULL)
 269     uiout->table_id = xstrdup (tblid);
 270   else
 271     uiout->table_id = NULL;
 272   clear_header_list (uiout);
 273
 274   uo_table_begin (uiout, nbrofcols, uiout->table_id);
 275 }
 276
 277 void
 278 ui_out_table_body (struct ui_out *uiout)
 279 {
 280   if (!uiout->table_flag)
 281     internal_error (__FILE__, __LINE__,
 282                     "table_body outside a table is not valid; it must be \
 283 after a table_begin and before a table_end.");
 284   if (uiout->body_flag)
 285     internal_error (__FILE__, __LINE__,
 286                     "extra table_body call not allowed; there must be \
 287 only one table_body after a table_begin and before a table_end.");
 288   if (uiout->headercurr->colno != uiout->table_columns)
 289     internal_error (__FILE__, __LINE__,
 290                     "number of headers differ from number of table \
 291 columns.");
 292
 293   uiout->body_flag = 1;
 294   uiout->headercurr = uiout->headerfirst;
 295
 296   uo_table_body (uiout);
 297 }
 298
 299 void
 300 ui_out_table_end (struct ui_out *uiout)
 301 {
 302   if (!uiout->table_flag)
 303     internal_error (__FILE__, __LINE__,
 304                     "misplaced table_end or missing table_begin.");
 305
 306   uiout->body_flag = 0;
 307   uiout->table_flag = 0;
 308
 309   uo_table_end (uiout);
 310
 311   if (uiout->table_id)
 312     xfree (uiout->table_id);
 313   clear_header_list (uiout);
 314 }
 315
 316 void
 317 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 318                      const char *colhdr)
 319 {
 320   if (!uiout->table_flag || uiout->body_flag)
 321     internal_error (__FILE__, __LINE__,
 322                     "table header must be specified after table_begin \
 323 and before table_body.");
 324
 325   append_header_to_list (uiout, width, alignment, colhdr);
 326
 327   uo_table_header (uiout, width, alignment, colhdr);
 328 }
 329
 330 void
 331 ui_out_begin (struct ui_out *uiout,
 332               enum ui_out_type type,
 333               const char *id)
 334 {
 335   int new_level;
 336   if (uiout->table_flag && !uiout->body_flag)
 337     internal_error (__FILE__, __LINE__,
 338                     "table header or table_body expected; lists must be \
 339 specified after table_body.");
 340   new_level = push_level (uiout, type, id);
 341   if (uiout->table_flag && (new_level == 1))
 342     uiout->headercurr = uiout->headerfirst;
 343   uo_begin (uiout, type, new_level, id);
 344 }
 345
 346 void
 347 ui_out_list_begin (struct ui_out *uiout,
 348                    const char *id)
 349 {
 350   ui_out_begin (uiout, ui_out_type_list, id);
 351 }
 352
 353 void
 354 ui_out_tuple_begin (struct ui_out *uiout, const char *id)
 355 {
 356   ui_out_begin (uiout, ui_out_type_tuple, id);
 357 }
 358
 359 void
 360 ui_out_end (struct ui_out *uiout,
 361             enum ui_out_type type)
 362 {
 363   int old_level = pop_level (uiout, type);
 364   uo_end (uiout, type, old_level);
 365 }
 366
 367 void
 368 ui_out_list_end (struct ui_out *uiout)
 369 {
 370   ui_out_end (uiout, ui_out_type_list);
 371 }
 372
 373 void
 374 ui_out_tuple_end (struct ui_out *uiout)
 375 {
 376   ui_out_end (uiout, ui_out_type_tuple);
 377 }
 378
 379 struct ui_out_end_cleanup_data
 380 {
 381   struct ui_out *uiout;
 382   enum ui_out_type type;
 383 };
 384
 385 static void
 386 do_cleanup_end (void *data)
 387 {
 388   struct ui_out_end_cleanup_data *end_cleanup_data = data;
 389   ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
 390   xfree (end_cleanup_data);
 391 }
 392
 393 static struct cleanup *
 394 make_cleanup_ui_out_end (struct ui_out *uiout,
 395                          enum ui_out_type type)
 396 {
 397   struct ui_out_end_cleanup_data *end_cleanup_data;
 398   end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
 399   end_cleanup_data->uiout = uiout;
 400   end_cleanup_data->type = type;
 401   return make_cleanup (do_cleanup_end, end_cleanup_data);
 402 }
 403
 404 struct cleanup *
 405 make_cleanup_ui_out_begin_end (struct ui_out *uiout,
 406                                enum ui_out_type type,
 407                                const char *id)
 408 {
 409   ui_out_begin (uiout, type, id);
 410   return make_cleanup_ui_out_end (uiout, type);
 411 }
 412
 413 struct cleanup *
 414 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 415                                      const char *id)
 416 {
 417   ui_out_tuple_begin (uiout, id);
 418   return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
 419 }
 420
 421 struct cleanup *
 422 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 423                                     const char *id)
 424 {
 425   ui_out_list_begin (uiout, id);
 426   return make_cleanup_ui_out_end (uiout, ui_out_type_list);
 427 }
 428
 429 void
 430 ui_out_field_int (struct ui_out *uiout,
 431                   const char *fldname,
 432                   int value)
 433 {
 434   int fldno;
 435   int width;
 436   int align;
 437   struct ui_out_level *current = current_level (uiout);
 438
 439   verify_field_proper_position (uiout);
 440
 441   current->field_count += 1;
 442   fldno = current->field_count;
 443
 444   verify_field_alignment (uiout, fldno, &width, &align);
 445
 446   uo_field_int (uiout, fldno, width, align, fldname, value);
 447 }
 448
 449 void
 450 ui_out_field_core_addr (struct ui_out *uiout,
 451                         const char *fldname,
 452                         CORE_ADDR address)
 453 {
 454   char addstr[20];
 455
 456   /* FIXME-32x64: need a print_address_numeric with field width */
 457   /* print_address_numeric (address, 1, local_stream); */
 458   strcpy (addstr, local_hex_string_custom ((unsigned long) address, "08l"));
 459
 460   ui_out_field_string (uiout, fldname, addstr);
 461 }
 462
 463 void
 464 ui_out_field_stream (struct ui_out *uiout,
 465                      const char *fldname,
 466                      struct ui_stream *buf)
 467 {
 468   long length;
 469   char *buffer = ui_file_xstrdup (buf->stream, &length);
 470   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 471   if (length > 0)
 472     ui_out_field_string (uiout, fldname, buffer);
 473   else
 474     ui_out_field_skip (uiout, fldname);
 475   ui_file_rewind (buf->stream);
 476   do_cleanups (old_cleanup);
 477 }
 478
 479 /* used to ommit a field */
 480
 481 void
 482 ui_out_field_skip (struct ui_out *uiout,
 483                    const char *fldname)
 484 {
 485   int fldno;
 486   int width;
 487   int align;
 488   struct ui_out_level *current = current_level (uiout);
 489
 490   verify_field_proper_position (uiout);
 491
 492   current->field_count += 1;
 493   fldno = current->field_count;
 494
 495   verify_field_alignment (uiout, fldno, &width, &align);
 496
 497   uo_field_skip (uiout, fldno, width, align, fldname);
 498 }
 499
 500 void
 501 ui_out_field_string (struct ui_out *uiout,
 502                      const char *fldname,
 503                      const char *string)
 504 {
 505   int fldno;
 506   int width;
 507   int align;
 508   struct ui_out_level *current = current_level (uiout);
 509
 510   verify_field_proper_position (uiout);
 511
 512   current->field_count += 1;
 513   fldno = current->field_count;
 514
 515   verify_field_alignment (uiout, fldno, &width, &align);
 516
 517   uo_field_string (uiout, fldno, width, align, fldname, string);
 518 }
 519
 520 /* VARARGS */
 521 void
 522 ui_out_field_fmt (struct ui_out *uiout,
 523                   const char *fldname,
 524                   const char *format, ...)
 525 {
 526   va_list args;
 527   int fldno;
 528   int width;
 529   int align;
 530   struct ui_out_level *current = current_level (uiout);
 531
 532   verify_field_proper_position (uiout);
 533
 534   current->field_count += 1;
 535   fldno = current->field_count;
 536
 537   /* will not align, but has to call anyway */
 538   verify_field_alignment (uiout, fldno, &width, &align);
 539
 540   va_start (args, format);
 541
 542   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 543
 544   va_end (args);
 545 }
 546
 547 void
 548 ui_out_spaces (struct ui_out *uiout, int numspaces)
 549 {
 550   uo_spaces (uiout, numspaces);
 551 }
 552
 553 void
 554 ui_out_text (struct ui_out *uiout,
 555              const char *string)
 556 {
 557   uo_text (uiout, string);
 558 }
 559
 560 void
 561 ui_out_message (struct ui_out *uiout, int verbosity,
 562                 const char *format,...)
 563 {
 564   va_list args;
 565
 566   va_start (args, format);
 567
 568   uo_message (uiout, verbosity, format, args);
 569
 570   va_end (args);
 571 }
 572
 573 struct ui_stream *
 574 ui_out_stream_new (struct ui_out *uiout)
 575 {
 576   struct ui_stream *tempbuf;
 577
 578   tempbuf = XMALLOC (struct ui_stream);
 579   tempbuf->uiout = uiout;
 580   tempbuf->stream = mem_fileopen ();
 581   return tempbuf;
 582 }
 583
 584 void
 585 ui_out_stream_delete (struct ui_stream *buf)
 586 {
 587   ui_file_delete (buf->stream);
 588   xfree (buf);
 589 }
 590
 591 static void
 592 do_stream_delete (void *buf)
 593 {
 594   ui_out_stream_delete (buf);
 595 }
 596
 597 struct cleanup *
 598 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 599 {
 600   return make_cleanup (do_stream_delete, buf);
 601 }
 602
 603
 604 void
 605 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 606 {
 607   uo_wrap_hint (uiout, identstring);
 608 }
 609
 610 void
 611 ui_out_flush (struct ui_out *uiout)
 612 {
 613   uo_flush (uiout);
 614 }
 615
 616 /* set the flags specified by the mask given */
 617 int
 618 ui_out_set_flags (struct ui_out *uiout, int mask)
 619 {
 620   int oldflags = uiout->flags;
 621
 622   uiout->flags |= mask;
 623
 624   return oldflags;
 625 }
 626
 627 /* clear the flags specified by the mask given */
 628 int
 629 ui_out_clear_flags (struct ui_out *uiout, int mask)
 630 {
 631   int oldflags = uiout->flags;
 632
 633   uiout->flags &= ~mask;
 634
 635   return oldflags;
 636 }
 637
 638 /* test the flags against the mask given */
 639 int
 640 ui_out_test_flags (struct ui_out *uiout, int mask)
 641 {
 642   return (uiout->flags & mask);
 643 }
 644
 645 /* obtain the current verbosity level (as stablished by the
 646    'set verbositylevel' command */
 647
 648 int
 649 ui_out_get_verblvl (struct ui_out *uiout)
 650 {
 651   /* FIXME: not implemented yet */
 652   return 0;
 653 }
 654
 655 #if 0
 656 void
 657 ui_out_result_begin (struct ui_out *uiout, char *class)
 658 {
 659 }
 660
 661 void
 662 ui_out_result_end (struct ui_out *uiout)
 663 {
 664 }
 665
 666 void
 667 ui_out_info_begin (struct ui_out *uiout, char *class)
 668 {
 669 }
 670
 671 void
 672 ui_out_info_end (struct ui_out *uiout)
 673 {
 674 }
 675
 676 void
 677 ui_out_notify_begin (struct ui_out *uiout, char *class)
 678 {
 679 }
 680
 681 void
 682 ui_out_notify_end (struct ui_out *uiout)
 683 {
 684 }
 685
 686 void
 687 ui_out_error_begin (struct ui_out *uiout, char *class)
 688 {
 689 }
 690
 691 void
 692 ui_out_error_end (struct ui_out *uiout)
 693 {
 694 }
 695 #endif
 696
 697 #if 0
 698 void
 699 gdb_error (ui_out * uiout, int severity, char *format,...)
 700 {
 701   va_list args;
 702 }
 703
 704 void
 705 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 706 {
 707 }
 708 #endif
 709
 710 /* default gdb-out hook functions */
 711
 712 static void
 713 default_table_begin (struct ui_out *uiout, int nbrofcols, const char *tblid)
 714 {
 715 }
 716
 717 static void
 718 default_table_body (struct ui_out *uiout)
 719 {
 720 }
 721
 722 static void
 723 default_table_end (struct ui_out *uiout)
 724 {
 725 }
 726
 727 static void
 728 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 729                       const char *colhdr)
 730 {
 731 }
 732
 733 static void
 734 default_begin (struct ui_out *uiout,
 735                enum ui_out_type type,
 736                int level,
 737                const char *id)
 738 {
 739 }
 740
 741 static void
 742 default_end (struct ui_out *uiout,
 743              enum ui_out_type type,
 744              int level)
 745 {
 746 }
 747
 748 static void
 749 default_field_int (struct ui_out *uiout, int fldno, int width,
 750                    enum ui_align align,
 751                    const char *fldname, int value)
 752 {
 753 }
 754
 755 static void
 756 default_field_skip (struct ui_out *uiout, int fldno, int width,
 757                     enum ui_align align, const char *fldname)
 758 {
 759 }
 760
 761 static void
 762 default_field_string (struct ui_out *uiout,
 763                       int fldno,
 764                       int width,
 765                       enum ui_align align,
 766                       const char *fldname,
 767                       const char *string)
 768 {
 769 }
 770
 771 static void
 772 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 773                    enum ui_align align,
 774                    const char *fldname,
 775                    const char *format,
 776                    va_list args)
 777 {
 778 }
 779
 780 static void
 781 default_spaces (struct ui_out *uiout, int numspaces)
 782 {
 783 }
 784
 785 static void
 786 default_text (struct ui_out *uiout, const char *string)
 787 {
 788 }
 789
 790 static void
 791 default_message (struct ui_out *uiout, int verbosity,
 792                  const char *format,
 793                  va_list args)
 794 {
 795 }
 796
 797 static void
 798 default_wrap_hint (struct ui_out *uiout, char *identstring)
 799 {
 800 }
 801
 802 static void
 803 default_flush (struct ui_out *uiout)
 804 {
 805 }
 806
 807 /* Interface to the implementation functions */
 808
 809 void
 810 uo_table_begin (struct ui_out *uiout, int nbrofcols,
 811                 const char *tblid)
 812 {
 813   if (!uiout->impl->table_begin)
 814     return;
 815   uiout->impl->table_begin (uiout, nbrofcols, tblid);
 816 }
 817
 818 void
 819 uo_table_body (struct ui_out *uiout)
 820 {
 821   if (!uiout->impl->table_body)
 822     return;
 823   uiout->impl->table_body (uiout);
 824 }
 825
 826 void
 827 uo_table_end (struct ui_out *uiout)
 828 {
 829   if (!uiout->impl->table_end)
 830     return;
 831   uiout->impl->table_end (uiout);
 832 }
 833
 834 void
 835 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
 836                  const char *colhdr)
 837 {
 838   if (!uiout->impl->table_header)
 839     return;
 840   uiout->impl->table_header (uiout, width, align, colhdr);
 841 }
 842
 843 void
 844 uo_begin (struct ui_out *uiout,
 845           enum ui_out_type type,
 846           int level,
 847           const char *id)
 848 {
 849   if (uiout->impl->begin == NULL)
 850     return;
 851   uiout->impl->begin (uiout, type, level, id);
 852 }
 853
 854 void
 855 uo_end (struct ui_out *uiout,
 856         enum ui_out_type type,
 857         int level)
 858 {
 859   if (uiout->impl->end == NULL)
 860     return;
 861   uiout->impl->end (uiout, type, level);
 862 }
 863
 864 void
 865 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 866               const char *fldname,
 867               int value)
 868 {
 869   if (!uiout->impl->field_int)
 870     return;
 871   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 872 }
 873
 874 void
 875 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 876                const char *fldname)
 877 {
 878   if (!uiout->impl->field_skip)
 879     return;
 880   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 881 }
 882
 883 void
 884 uo_field_string (struct ui_out *uiout, int fldno, int width,
 885                  enum ui_align align,
 886                  const char *fldname,
 887                  const char *string)
 888 {
 889   if (!uiout->impl->field_string)
 890     return;
 891   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 892 }
 893
 894 void
 895 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 896               const char *fldname,
 897               const char *format,
 898               va_list args)
 899 {
 900   if (!uiout->impl->field_fmt)
 901     return;
 902   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 903 }
 904
 905 void
 906 uo_spaces (struct ui_out *uiout, int numspaces)
 907 {
 908   if (!uiout->impl->spaces)
 909     return;
 910   uiout->impl->spaces (uiout, numspaces);
 911 }
 912
 913 void
 914 uo_text (struct ui_out *uiout,
 915          const char *string)
 916 {
 917   if (!uiout->impl->text)
 918     return;
 919   uiout->impl->text (uiout, string);
 920 }
 921
 922 void
 923 uo_message (struct ui_out *uiout, int verbosity,
 924             const char *format,
 925             va_list args)
 926 {
 927   if (!uiout->impl->message)
 928     return;
 929   uiout->impl->message (uiout, verbosity, format, args);
 930 }
 931
 932 void
 933 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 934 {
 935   if (!uiout->impl->wrap_hint)
 936     return;
 937   uiout->impl->wrap_hint (uiout, identstring);
 938 }
 939
 940 void
 941 uo_flush (struct ui_out *uiout)
 942 {
 943   if (!uiout->impl->flush)
 944     return;
 945   uiout->impl->flush (uiout);
 946 }
 947
 948 /* local functions */
 949
 950 /* list of column headers manipulation routines */
 951
 952 static void
 953 clear_header_list (struct ui_out *uiout)
 954 {
 955   while (uiout->headerfirst != NULL)
 956     {
 957       uiout->headercurr = uiout->headerfirst;
 958       uiout->headerfirst = uiout->headerfirst->next;
 959       if (uiout->headercurr->colhdr != NULL)
 960         xfree (uiout->headercurr->colhdr);
 961       xfree (uiout->headercurr);
 962     }
 963   uiout->headerlast = NULL;
 964   uiout->headercurr = NULL;
 965 }
 966
 967 static void
 968 append_header_to_list (struct ui_out *uiout,
 969                        int width,
 970                        int alignment,
 971                        const char *colhdr)
 972 {
 973   struct ui_out_hdr *temphdr;
 974
 975   temphdr = XMALLOC (struct ui_out_hdr);
 976   temphdr->width = width;
 977   temphdr->alignment = alignment;
 978   /* we have to copy the column title as the original may be an automatic */
 979   if (colhdr != NULL)
 980     {
 981       temphdr->colhdr = xmalloc (strlen (colhdr) + 1);
 982       strcpy (temphdr->colhdr, colhdr);
 983     }
 984   temphdr->next = NULL;
 985   if (uiout->headerfirst == NULL)
 986     {
 987       temphdr->colno = 1;
 988       uiout->headerfirst = temphdr;
 989       uiout->headerlast = temphdr;
 990     }
 991   else
 992     {
 993       temphdr->colno = uiout->headerlast->colno + 1;
 994       uiout->headerlast->next = temphdr;
 995       uiout->headerlast = temphdr;
 996     }
 997   uiout->headercurr = uiout->headerlast;
 998 }
 999
1000 /* returns 0 if there is no more headers */
1001
1002 static int
1003 get_curr_header (struct ui_out *uiout,
1004                  int *colno,
1005                  int *width,
1006                  int *alignment,
1007                  char **colhdr)
1008 {
1009   /* There may be no headers at all or we may have used all columns */
1010   if (uiout->headercurr == NULL)
1011     return 0;
1012   *colno = uiout->headercurr->colno;
1013   *width = uiout->headercurr->width;
1014   *alignment = uiout->headercurr->alignment;
1015   *colhdr = uiout->headercurr->colhdr;
1016   uiout->headercurr = uiout->headercurr->next;
1017   return 1;
1018 }
1019
1020 /* makes sure the field_* calls were properly placed */
1021
1022 static void
1023 verify_field_proper_position (struct ui_out *uiout)
1024 {
1025   if (uiout->table_flag)
1026     {
1027       if (!uiout->body_flag)
1028         internal_error (__FILE__, __LINE__,
1029                         "table_body missing; table fields must be \
1030 specified after table_body and inside a list.");
1031       if (uiout->level == 0)
1032         internal_error (__FILE__, __LINE__,
1033                         "list_begin missing; table fields must be \
1034 specified after table_body and inside a list.");
1035     }
1036 }
1037
1038 /* determines what is the alignment policy */
1039
1040 static void
1041 verify_field_alignment (struct ui_out *uiout,
1042                         int fldno,
1043                         int *width,
1044                         int *align)
1045 {
1046   int colno;
1047   char *text;
1048
1049   if (uiout->table_flag
1050       && get_curr_header (uiout, &colno, width, align, &text))
1051     {
1052       if (fldno != colno)
1053         internal_error (__FILE__, __LINE__,
1054                         "ui-out internal error in handling headers.");
1055     }
1056   else
1057     {
1058       *width = 0;
1059       *align = ui_noalign;
1060     }
1061 }
1062
1063 /* access to ui_out format private members */
1064
1065 void
1066 ui_out_get_field_separator (struct ui_out *uiout)
1067 {
1068 }
1069
1070 /* Access to ui-out members data */
1071
1072 struct ui_out_data *
1073 ui_out_data (struct ui_out *uiout)
1074 {
1075   return uiout->data;
1076 }
1077
1078 /* initalize private members at startup */
1079
1080 struct ui_out *
1081 ui_out_new (struct ui_out_impl *impl,
1082             struct ui_out_data *data,
1083             int flags)
1084 {
1085   struct ui_out *uiout = XMALLOC (struct ui_out);
1086   uiout->data = data;
1087   uiout->impl = impl;
1088   uiout->flags = flags;
1089   uiout->table_flag = 0;
1090   uiout->body_flag = 0;
1091   uiout->level = 0;
1092   memset (uiout->levels, 0, sizeof (uiout->levels));
1093   uiout->headerfirst = NULL;
1094   uiout->headerlast = NULL;
1095   uiout->headercurr = NULL;
1096   return uiout;
1097 }
1098
1099 /* standard gdb initialization hook */
1100
1101 void
1102 _initialize_ui_out (void)
1103 {
1104   /* nothing needs to be done */
1105 }