gdb/mi/mi-out.c

   1 /* MI Command Set - output generating routines.
   2
   3    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   4
   5    Contributed by Cygnus Solutions (a Red Hat company).
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "ui-out.h"
  24 #include "mi-out.h"
  25
  26 struct ui_out_data
  27   {
  28     int suppress_field_separator;
  29     int suppress_output;
  30     int mi_version;
  31     struct ui_file *buffer;
  32     struct ui_file *original_buffer;
  33   };
  34 typedef struct ui_out_data mi_out_data;
  35
  36 /* These are the MI output functions */
  37
  38 static void mi_table_begin (struct ui_out *uiout, int nbrofcols,
  39                             int nr_rows, const char *tblid);
  40 static void mi_table_body (struct ui_out *uiout);
  41 static void mi_table_end (struct ui_out *uiout);
  42 static void mi_table_header (struct ui_out *uiout, int width,
  43                              enum ui_align alig, const char *col_name,
  44                              const char *colhdr);
  45 static void mi_begin (struct ui_out *uiout, enum ui_out_type type,
  46                       int level, const char *id);
  47 static void mi_end (struct ui_out *uiout, enum ui_out_type type, int level);
  48 static void mi_field_int (struct ui_out *uiout, int fldno, int width,
  49                           enum ui_align alig, const char *fldname, int value);
  50 static void mi_field_skip (struct ui_out *uiout, int fldno, int width,
  51                            enum ui_align alig, const char *fldname);
  52 static void mi_field_string (struct ui_out *uiout, int fldno, int width,
  53                              enum ui_align alig, const char *fldname,
  54                              const char *string);
  55 static void mi_field_fmt (struct ui_out *uiout, int fldno,
  56                           int width, enum ui_align align,
  57                           const char *fldname, const char *format,
  58                           va_list args) ATTRIBUTE_PRINTF (6, 0);
  59 static void mi_spaces (struct ui_out *uiout, int numspaces);
  60 static void mi_text (struct ui_out *uiout, const char *string);
  61 static void mi_message (struct ui_out *uiout, int verbosity,
  62                         const char *format, va_list args)
  63      ATTRIBUTE_PRINTF (3, 0);
  64 static void mi_wrap_hint (struct ui_out *uiout, char *identstring);
  65 static void mi_flush (struct ui_out *uiout);
  66 static int mi_redirect (struct ui_out *uiout, struct ui_file *outstream);
  67
  68 /* This is the MI ui-out implementation functions vector */
  69
  70 /* FIXME: This can be initialized dynamically after default is set to
  71    handle initial output in main.c */
  72
  73 struct ui_out_impl mi_ui_out_impl =
  74 {
  75   mi_table_begin,
  76   mi_table_body,
  77   mi_table_end,
  78   mi_table_header,
  79   mi_begin,
  80   mi_end,
  81   mi_field_int,
  82   mi_field_skip,
  83   mi_field_string,
  84   mi_field_fmt,
  85   mi_spaces,
  86   mi_text,
  87   mi_message,
  88   mi_wrap_hint,
  89   mi_flush,
  90   mi_redirect,
  91   0,
  92   1, /* Needs MI hacks.  */
  93 };
  94
  95 /* Prototypes for local functions */
  96
  97 extern void _initialize_mi_out (void);
  98 static void field_separator (struct ui_out *uiout);
  99 static void mi_open (struct ui_out *uiout, const char *name,
 100                      enum ui_out_type type);
 101 static void mi_close (struct ui_out *uiout, enum ui_out_type type);
 102
 103 /* Mark beginning of a table.  */
 104
 105 void
 106 mi_table_begin (struct ui_out *uiout,
 107                 int nr_cols,
 108                 int nr_rows,
 109                 const char *tblid)
 110 {
 111   mi_open (uiout, tblid, ui_out_type_tuple);
 112   mi_field_int (uiout, -1, -1, -1, "nr_rows", nr_rows);
 113   mi_field_int (uiout, -1, -1, -1, "nr_cols", nr_cols);
 114   mi_open (uiout, "hdr", ui_out_type_list);
 115 }
 116
 117 /* Mark beginning of a table body.  */
 118
 119 void
 120 mi_table_body (struct ui_out *uiout)
 121 {
 122   mi_out_data *data = ui_out_data (uiout);
 123
 124   if (data->suppress_output)
 125     return;
 126   /* close the table header line if there were any headers */
 127   mi_close (uiout, ui_out_type_list);
 128   mi_open (uiout, "body", ui_out_type_list);
 129 }
 130
 131 /* Mark end of a table.  */
 132
 133 void
 134 mi_table_end (struct ui_out *uiout)
 135 {
 136   mi_out_data *data = ui_out_data (uiout);
 137
 138   data->suppress_output = 0;
 139   mi_close (uiout, ui_out_type_list); /* body */
 140   mi_close (uiout, ui_out_type_tuple);
 141 }
 142
 143 /* Specify table header.  */
 144
 145 void
 146 mi_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 147                  const char *col_name, const char *colhdr)
 148 {
 149   mi_out_data *data = ui_out_data (uiout);
 150
 151   if (data->suppress_output)
 152     return;
 153
 154   mi_open (uiout, NULL, ui_out_type_tuple);
 155   mi_field_int (uiout, 0, 0, 0, "width", width);
 156   mi_field_int (uiout, 0, 0, 0, "alignment", alignment);
 157   mi_field_string (uiout, 0, 0, 0, "col_name", col_name);
 158   mi_field_string (uiout, 0, width, alignment, "colhdr", colhdr);
 159   mi_close (uiout, ui_out_type_tuple);
 160 }
 161
 162 /* Mark beginning of a list.  */
 163
 164 void
 165 mi_begin (struct ui_out *uiout, enum ui_out_type type, int level,
 166           const char *id)
 167 {
 168   mi_out_data *data = ui_out_data (uiout);
 169
 170   if (data->suppress_output)
 171     return;
 172
 173   mi_open (uiout, id, type);
 174 }
 175
 176 /* Mark end of a list.  */
 177
 178 void
 179 mi_end (struct ui_out *uiout, enum ui_out_type type, int level)
 180 {
 181   mi_out_data *data = ui_out_data (uiout);
 182
 183   if (data->suppress_output)
 184     return;
 185
 186   mi_close (uiout, type);
 187 }
 188
 189 /* Output an int field.  */
 190
 191 static void
 192 mi_field_int (struct ui_out *uiout, int fldno, int width,
 193               enum ui_align alignment, const char *fldname, int value)
 194 {
 195   char buffer[20];      /* FIXME: how many chars long a %d can become? */
 196   mi_out_data *data = ui_out_data (uiout);
 197
 198   if (data->suppress_output)
 199     return;
 200
 201   xsnprintf (buffer, sizeof (buffer), "%d", value);
 202   mi_field_string (uiout, fldno, width, alignment, fldname, buffer);
 203 }
 204
 205 /* Used to omit a field.  */
 206
 207 void
 208 mi_field_skip (struct ui_out *uiout, int fldno, int width,
 209                enum ui_align alignment, const char *fldname)
 210 {
 211 }
 212
 213 /* Other specific mi_field_* end up here so alignment and field
 214    separators are both handled by mi_field_string. */
 215
 216 void
 217 mi_field_string (struct ui_out *uiout, int fldno, int width,
 218                  enum ui_align align, const char *fldname, const char *string)
 219 {
 220   mi_out_data *data = ui_out_data (uiout);
 221
 222   if (data->suppress_output)
 223     return;
 224
 225   field_separator (uiout);
 226   if (fldname)
 227     fprintf_unfiltered (data->buffer, "%s=", fldname);
 228   fprintf_unfiltered (data->buffer, "\"");
 229   if (string)
 230     fputstr_unfiltered (string, '"', data->buffer);
 231   fprintf_unfiltered (data->buffer, "\"");
 232 }
 233
 234 /* This is the only field function that does not align.  */
 235
 236 void
 237 mi_field_fmt (struct ui_out *uiout, int fldno, int width,
 238               enum ui_align align, const char *fldname,
 239               const char *format, va_list args)
 240 {
 241   mi_out_data *data = ui_out_data (uiout);
 242
 243   if (data->suppress_output)
 244     return;
 245
 246   field_separator (uiout);
 247   if (fldname)
 248     fprintf_unfiltered (data->buffer, "%s=\"", fldname);
 249   else
 250     fputs_unfiltered ("\"", data->buffer);
 251   vfprintf_unfiltered (data->buffer, format, args);
 252   fputs_unfiltered ("\"", data->buffer);
 253 }
 254
 255 void
 256 mi_spaces (struct ui_out *uiout, int numspaces)
 257 {
 258 }
 259
 260 void
 261 mi_text (struct ui_out *uiout, const char *string)
 262 {
 263 }
 264
 265 void
 266 mi_message (struct ui_out *uiout, int verbosity,
 267             const char *format, va_list args)
 268 {
 269 }
 270
 271 void
 272 mi_wrap_hint (struct ui_out *uiout, char *identstring)
 273 {
 274   wrap_here (identstring);
 275 }
 276
 277 void
 278 mi_flush (struct ui_out *uiout)
 279 {
 280   mi_out_data *data = ui_out_data (uiout);
 281
 282   gdb_flush (data->buffer);
 283 }
 284
 285 int
 286 mi_redirect (struct ui_out *uiout, struct ui_file *outstream)
 287 {
 288   mi_out_data *data = ui_out_data (uiout);
 289
 290   if (outstream != NULL)
 291     {
 292       data->original_buffer = data->buffer;
 293       data->buffer = outstream;
 294     }
 295   else if (data->original_buffer != NULL)
 296     {
 297       data->buffer = data->original_buffer;
 298       data->original_buffer = NULL;
 299     }
 300
 301   return 0;
 302 }
 303
 304 /* local functions */
 305
 306 /* access to ui_out format private members */
 307
 308 static void
 309 field_separator (struct ui_out *uiout)
 310 {
 311   mi_out_data *data = ui_out_data (uiout);
 312
 313   if (data->suppress_field_separator)
 314     data->suppress_field_separator = 0;
 315   else
 316     fputc_unfiltered (',', data->buffer);
 317 }
 318
 319 static void
 320 mi_open (struct ui_out *uiout, const char *name, enum ui_out_type type)
 321 {
 322   mi_out_data *data = ui_out_data (uiout);
 323
 324   field_separator (uiout);
 325   data->suppress_field_separator = 1;
 326   if (name)
 327     fprintf_unfiltered (data->buffer, "%s=", name);
 328   switch (type)
 329     {
 330     case ui_out_type_tuple:
 331       fputc_unfiltered ('{', data->buffer);
 332       break;
 333     case ui_out_type_list:
 334       fputc_unfiltered ('[', data->buffer);
 335       break;
 336     default:
 337       internal_error (__FILE__, __LINE__, _("bad switch"));
 338     }
 339 }
 340
 341 static void
 342 mi_close (struct ui_out *uiout, enum ui_out_type type)
 343 {
 344   mi_out_data *data = ui_out_data (uiout);
 345
 346   switch (type)
 347     {
 348     case ui_out_type_tuple:
 349       fputc_unfiltered ('}', data->buffer);
 350       break;
 351     case ui_out_type_list:
 352       fputc_unfiltered (']', data->buffer);
 353       break;
 354     default:
 355       internal_error (__FILE__, __LINE__, _("bad switch"));
 356     }
 357   data->suppress_field_separator = 0;
 358 }
 359
 360 /* Add a string to the buffer.  */
 361
 362 void
 363 mi_out_buffered (struct ui_out *uiout, char *string)
 364 {
 365   mi_out_data *data = ui_out_data (uiout);
 366
 367   fprintf_unfiltered (data->buffer, "%s", string);
 368 }
 369
 370 /* Clear the buffer.  */
 371
 372 void
 373 mi_out_rewind (struct ui_out *uiout)
 374 {
 375   mi_out_data *data = ui_out_data (uiout);
 376
 377   ui_file_rewind (data->buffer);
 378 }
 379
 380 /* Dump the buffer onto the specified stream.  */
 381
 382 static void
 383 do_write (void *data, const char *buffer, long length_buffer)
 384 {
 385   ui_file_write (data, buffer, length_buffer);
 386 }
 387
 388 void
 389 mi_out_put (struct ui_out *uiout, struct ui_file *stream)
 390 {
 391   mi_out_data *data = ui_out_data (uiout);
 392
 393   ui_file_put (data->buffer, do_write, stream);
 394   ui_file_rewind (data->buffer);
 395 }
 396
 397 /* Return the current MI version.  */
 398
 399 int
 400 mi_version (struct ui_out *uiout)
 401 {
 402   mi_out_data *data = ui_out_data (uiout);
 403
 404   return data->mi_version;
 405 }
 406
 407 /* Initialize private members at startup.  */
 408
 409 struct ui_out *
 410 mi_out_new (int mi_version)
 411 {
 412   int flags = 0;
 413
 414   mi_out_data *data = XNEW (mi_out_data);
 415   data->suppress_field_separator = 0;
 416   data->suppress_output = 0;
 417   data->mi_version = mi_version;
 418   /* FIXME: This code should be using a ``string_file'' and not the
 419      TUI buffer hack. */
 420   data->buffer = mem_fileopen ();
 421   return ui_out_new (&mi_ui_out_impl, data, flags);
 422 }