gdb/mi/mi-out.c

   1 /* MI Command Set - output generating routines.
   2    Copyright 2000 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions (a Red Hat company).
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "ui-out.h"
  24 #include "mi-out.h"
  25
  26 /* Convenience macro for allocting typesafe memory. */
  27
  28 #ifndef XMALLOC
  29 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  30 #endif
  31
  32 struct ui_out_data
  33   {
  34     int supress_field_separator;
  35     int first_header;
  36     struct ui_file *buffer;
  37   };
  38
  39 /* These are the MI output functions */
  40
  41 static void mi_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid);
  42 static void mi_table_body (struct ui_out *uiout);
  43 static void mi_table_end (struct ui_out *uiout);
  44 static void mi_table_header (struct ui_out *uiout, int width,
  45                              enum ui_align alig, char *colhdr);
  46 static void mi_begin (struct ui_out *uiout, enum ui_out_type type,
  47                       int level, const char *id);
  48 static void mi_end (struct ui_out *uiout, enum ui_out_type type, int level);
  49 static void mi_field_int (struct ui_out *uiout, int fldno, int width,
  50                           enum ui_align alig, char *fldname, int value);
  51 static void mi_field_skip (struct ui_out *uiout, int fldno, int width,
  52                            enum ui_align alig, char *fldname);
  53 static void mi_field_string (struct ui_out *uiout, int fldno, int width,
  54                              enum ui_align alig, char *fldname,
  55                              const char *string);
  56 static void mi_field_fmt (struct ui_out *uiout, int fldno,
  57                           int width, enum ui_align align,
  58                           char *fldname, char *format, va_list args);
  59 static void mi_spaces (struct ui_out *uiout, int numspaces);
  60 static void mi_text (struct ui_out *uiout, char *string);
  61 static void mi_message (struct ui_out *uiout, int verbosity, char *format,
  62                         va_list args);
  63 static void mi_wrap_hint (struct ui_out *uiout, char *identstring);
  64 static void mi_flush (struct ui_out *uiout);
  65
  66 /* This is the MI ui-out implementation functions vector */
  67
  68 /* FIXME: This can be initialized dynamically after default is set to
  69    handle initial output in main.c */
  70
  71 struct ui_out_impl mi_ui_out_impl =
  72 {
  73   mi_table_begin,
  74   mi_table_body,
  75   mi_table_end,
  76   mi_table_header,
  77   mi_begin,
  78   mi_end,
  79   mi_field_int,
  80   mi_field_skip,
  81   mi_field_string,
  82   mi_field_fmt,
  83   mi_spaces,
  84   mi_text,
  85   mi_message,
  86   mi_wrap_hint,
  87   mi_flush
  88 };
  89
  90 /* Prototypes for local functions */
  91
  92 extern void _initialize_mi_out (void);
  93 static void field_separator (struct ui_out *uiout);
  94 static void mi_open (struct ui_out *uiout, enum ui_out_type type);
  95 static void mi_close (struct ui_out *uiout, enum ui_out_type type);
  96
  97 static void out_field_fmt (struct ui_out *uiout, int fldno, char *fldname,
  98                            char *format,...);
  99
 100 /* Mark beginning of a table */
 101
 102 void
 103 mi_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 104 {
 105   struct ui_out_data *data = ui_out_data (uiout);
 106   field_separator (uiout);
 107   if (tblid)
 108     fprintf_unfiltered (data->buffer, "%s=", tblid);
 109   mi_open (uiout, ui_out_type_tuple);
 110   data->first_header = 0;
 111   data->supress_field_separator = 1;
 112 }
 113
 114 /* Mark beginning of a table body */
 115
 116 void
 117 mi_table_body (struct ui_out *uiout)
 118 {
 119   struct ui_out_data *data = ui_out_data (uiout);
 120   /* close the table header line if there were any headers */
 121   if (data->first_header)
 122     mi_close (uiout, ui_out_type_tuple);
 123 }
 124
 125 /* Mark end of a table */
 126
 127 void
 128 mi_table_end (struct ui_out *uiout)
 129 {
 130   struct ui_out_data *data = ui_out_data (uiout);
 131   mi_close (uiout, ui_out_type_tuple);
 132   /* If table was empty this flag did not get reset yet */
 133   data->supress_field_separator = 0;
 134 }
 135
 136 /* Specify table header */
 137
 138 void
 139 mi_table_header (struct ui_out *uiout, int width, int alignment, char *colhdr)
 140 {
 141   struct ui_out_data *data = ui_out_data (uiout);
 142   if (!data->first_header++)
 143     {
 144       fputs_unfiltered ("hdr=", data->buffer);
 145       mi_open (uiout, ui_out_type_tuple);
 146     }
 147   mi_field_string (uiout, 0, width, alignment, 0, colhdr);
 148 }
 149
 150 /* Mark beginning of a list */
 151
 152 void
 153 mi_begin (struct ui_out *uiout,
 154           enum ui_out_type type,
 155           int level,
 156           const char *id)
 157 {
 158   struct ui_out_data *data = ui_out_data (uiout);
 159   field_separator (uiout);
 160   data->supress_field_separator = 1;
 161   if (id)
 162     fprintf_unfiltered (data->buffer, "%s=", id);
 163   mi_open (uiout, type);
 164 }
 165
 166 /* Mark end of a list */
 167
 168 void
 169 mi_end (struct ui_out *uiout,
 170         enum ui_out_type type,
 171         int level)
 172 {
 173   struct ui_out_data *data = ui_out_data (uiout);
 174   mi_close (uiout, type);
 175   /* If list was empty this flag did not get reset yet */
 176   data->supress_field_separator = 0;
 177 }
 178
 179 /* output an int field */
 180
 181 void
 182 mi_field_int (struct ui_out *uiout, int fldno, int width, int alignment,
 183               char *fldname, int value)
 184 {
 185   char buffer[20];              /* FIXME: how many chars long a %d can become? */
 186
 187   sprintf (buffer, "%d", value);
 188   mi_field_string (uiout, fldno, width, alignment, fldname, buffer);
 189 }
 190
 191 /* used to ommit a field */
 192
 193 void
 194 mi_field_skip (struct ui_out *uiout, int fldno, int width, int alignment,
 195                char *fldname)
 196 {
 197   mi_field_string (uiout, fldno, width, alignment, fldname, "");
 198 }
 199
 200 /* other specific mi_field_* end up here so alignment and field
 201    separators are both handled by mi_field_string */
 202
 203 void
 204 mi_field_string (struct ui_out *uiout,
 205                  int fldno,
 206                  int width,
 207                  int align,
 208                  char *fldname,
 209                  const char *string)
 210 {
 211   struct ui_out_data *data = ui_out_data (uiout);
 212   field_separator (uiout);
 213   if (fldname)
 214     fprintf_unfiltered (data->buffer, "%s=", fldname);
 215   fprintf_unfiltered (data->buffer, "\"");
 216   if (string)
 217     fputstr_unfiltered (string, '"', data->buffer);
 218   fprintf_unfiltered (data->buffer, "\"");
 219 }
 220
 221 /* This is the only field function that does not align */
 222
 223 void
 224 mi_field_fmt (struct ui_out *uiout, int fldno,
 225               int width, enum ui_align align,
 226               char *fldname, char *format, va_list args)
 227 {
 228   struct ui_out_data *data = ui_out_data (uiout);
 229   field_separator (uiout);
 230   if (fldname)
 231     fprintf_unfiltered (data->buffer, "%s=\"", fldname);
 232   else
 233     fputs_unfiltered ("\"", data->buffer);
 234   vfprintf_unfiltered (data->buffer, format, args);
 235   fputs_unfiltered ("\"", data->buffer);
 236 }
 237
 238 void
 239 mi_spaces (struct ui_out *uiout, int numspaces)
 240 {
 241 }
 242
 243 void
 244 mi_text (struct ui_out *uiout, char *string)
 245 {
 246 }
 247
 248 void
 249 mi_message (struct ui_out *uiout, int verbosity, char *format, va_list args)
 250 {
 251 }
 252
 253 void
 254 mi_wrap_hint (struct ui_out *uiout, char *identstring)
 255 {
 256   wrap_here (identstring);
 257 }
 258
 259 void
 260 mi_flush (struct ui_out *uiout)
 261 {
 262   struct ui_out_data *data = ui_out_data (uiout);
 263   gdb_flush (data->buffer);
 264 }
 265
 266 /* local functions */
 267
 268 /* Like mi_field_fmt, but takes a variable number of args
 269    and makes a va_list and does not insert a separator */
 270
 271 /* VARARGS */
 272 static void
 273 out_field_fmt (struct ui_out *uiout, int fldno, char *fldname,
 274                char *format,...)
 275 {
 276   struct ui_out_data *data = ui_out_data (uiout);
 277   va_list args;
 278
 279   field_separator (uiout);
 280   if (fldname)
 281     fprintf_unfiltered (data->buffer, "%s=\"", fldname);
 282   else
 283     fputs_unfiltered ("\"", data->buffer);
 284
 285   va_start (args, format);
 286   vfprintf_unfiltered (data->buffer, format, args);
 287
 288   fputs_unfiltered ("\"", data->buffer);
 289
 290   va_end (args);
 291 }
 292
 293 /* access to ui_out format private members */
 294
 295 static void
 296 field_separator (struct ui_out *uiout)
 297 {
 298   struct ui_out_data *data = ui_out_data (uiout);
 299   if (data->supress_field_separator)
 300     data->supress_field_separator = 0;
 301   else
 302     fputc_unfiltered (',', data->buffer);
 303 }
 304
 305 static void
 306 mi_open (struct ui_out *uiout,
 307          enum ui_out_type type)
 308 {
 309   struct ui_out_data *data = ui_out_data (uiout);
 310   switch (type)
 311     {
 312     case ui_out_type_tuple:
 313       fputc_unfiltered ('{', data->buffer);
 314       break;
 315     case ui_out_type_list:
 316       fputc_unfiltered ('[', data->buffer);
 317       break;
 318     default:
 319       internal_error (__FILE__, __LINE__, "bad switch");
 320     }
 321 }
 322
 323 static void
 324 mi_close (struct ui_out *uiout,
 325           enum ui_out_type type)
 326 {
 327   struct ui_out_data *data = ui_out_data (uiout);
 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 /* add a string to the buffer */
 342
 343 void
 344 mi_out_buffered (struct ui_out *uiout, char *string)
 345 {
 346   struct ui_out_data *data = ui_out_data (uiout);
 347   fprintf_unfiltered (data->buffer, "%s", string);
 348 }
 349
 350 /* clear the buffer */
 351
 352 void
 353 mi_out_rewind (struct ui_out *uiout)
 354 {
 355   struct ui_out_data *data = ui_out_data (uiout);
 356   ui_file_rewind (data->buffer);
 357 }
 358
 359 /* dump the buffer onto the specified stream */
 360
 361 static void
 362 do_write (void *data, const char *buffer, long length_buffer)
 363 {
 364   ui_file_write (data, buffer, length_buffer);
 365 }
 366
 367 void
 368 mi_out_put (struct ui_out *uiout,
 369             struct ui_file *stream)
 370 {
 371   struct ui_out_data *data = ui_out_data (uiout);
 372   ui_file_put (data->buffer, do_write, stream);
 373   ui_file_rewind (data->buffer);
 374 }
 375
 376 /* initalize private members at startup */
 377
 378 struct ui_out *
 379 mi_out_new (void)
 380 {
 381   int flags = 0;
 382   struct ui_out_data *data = XMALLOC (struct ui_out_data);
 383   data->supress_field_separator = 0;
 384   /* FIXME: This code should be using a ``string_file'' and not the
 385      TUI buffer hack. */
 386   data->buffer = mem_fileopen ();
 387   return ui_out_new (&mi_ui_out_impl, data, flags);
 388 }
 389
 390 /* standard gdb initialization hook */
 391 void
 392 _initialize_mi_out (void)
 393 {
 394   /* nothing happens here */
 395 }