gdb/cli-out.c

   1 /* Output generating routines for GDB CLI.
   2    Copyright 1999, 2000 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 "ui-out.h"
  25 #include "cli-out.h"
  26 #include "gdb_string.h"
  27 #include "gdb_assert.h"
  28
  29 /* Convenience macro for allocting typesafe memory. */
  30
  31 #ifndef XMALLOC
  32 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  33 #endif
  34
  35 struct ui_out_data
  36   {
  37     struct ui_file *stream;
  38     int suppress_output;
  39   };
  40
  41 /* These are the CLI output functions */
  42
  43 static void cli_table_begin (struct ui_out *uiout, int nbrofcols,
  44                              int nr_rows, const char *tblid);
  45 static void cli_table_body (struct ui_out *uiout);
  46 static void cli_table_end (struct ui_out *uiout);
  47 static void cli_table_header (struct ui_out *uiout, int width,
  48                               enum ui_align alig,
  49                               const char *colhdr);
  50 static void cli_begin (struct ui_out *uiout, enum ui_out_type type,
  51                        int level, const char *lstid);
  52 static void cli_end (struct ui_out *uiout, enum ui_out_type type, int level);
  53 static void cli_field_int (struct ui_out *uiout, int fldno, int width,
  54                            enum ui_align alig, const char *fldname, int value);
  55 static void cli_field_skip (struct ui_out *uiout, int fldno, int width,
  56                             enum ui_align alig, const char *fldname);
  57 static void cli_field_string (struct ui_out *uiout, int fldno, int width,
  58                               enum ui_align alig, const char *fldname,
  59                               const char *string);
  60 static void cli_field_fmt (struct ui_out *uiout, int fldno,
  61                            int width, enum ui_align align,
  62                            const char *fldname, const char *format,
  63                            va_list args);
  64 static void cli_spaces (struct ui_out *uiout, int numspaces);
  65 static void cli_text (struct ui_out *uiout, const char *string);
  66 static void cli_message (struct ui_out *uiout, int verbosity,
  67                          const char *format, va_list args);
  68 static void cli_wrap_hint (struct ui_out *uiout, char *identstring);
  69 static void cli_flush (struct ui_out *uiout);
  70
  71 /* This is the CLI ui-out implementation functions vector */
  72
  73 /* FIXME: This can be initialized dynamically after default is set to
  74    handle initial output in main.c */
  75
  76 static struct ui_out_impl cli_ui_out_impl =
  77 {
  78   cli_table_begin,
  79   cli_table_body,
  80   cli_table_end,
  81   cli_table_header,
  82   cli_begin,
  83   cli_end,
  84   cli_field_int,
  85   cli_field_skip,
  86   cli_field_string,
  87   cli_field_fmt,
  88   cli_spaces,
  89   cli_text,
  90   cli_message,
  91   cli_wrap_hint,
  92   cli_flush
  93 };
  94
  95 /* Prototypes for local functions */
  96
  97 extern void _initialize_cli_out (void);
  98
  99 static void field_separator (void);
 100
 101 static void out_field_fmt (struct ui_out *uiout, int fldno,
 102                            const char *fldname,
 103                            const char *format,...);
 104
 105 /* local variables */
 106
 107 /* (none yet) */
 108
 109 /* Mark beginning of a table */
 110
 111 void
 112 cli_table_begin (struct ui_out *uiout, int nbrofcols,
 113                  int nr_rows,
 114                  const char *tblid)
 115 {
 116   struct ui_out_data *data = ui_out_data (uiout);
 117   if (nr_rows == 0)
 118     data->suppress_output = 1;
 119   else
 120     /* Only the table suppresses the output and, fortunatly, a table
 121        is not a recursive data structure. */
 122     gdb_assert (data->suppress_output == 0);
 123 }
 124
 125 /* Mark beginning of a table body */
 126
 127 void
 128 cli_table_body (struct ui_out *uiout)
 129 {
 130   struct ui_out_data *data = ui_out_data (uiout);
 131   if (data->suppress_output)
 132     return;
 133   /* first, close the table header line */
 134   cli_text (uiout, "\n");
 135 }
 136
 137 /* Mark end of a table */
 138
 139 void
 140 cli_table_end (struct ui_out *uiout)
 141 {
 142   struct ui_out_data *data = ui_out_data (uiout);
 143   data->suppress_output = 0;
 144 }
 145
 146 /* Specify table header */
 147
 148 void
 149 cli_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 150                   const char *colhdr)
 151 {
 152   struct ui_out_data *data = ui_out_data (uiout);
 153   if (data->suppress_output)
 154     return;
 155   cli_field_string (uiout, 0, width, alignment, 0, colhdr);
 156 }
 157
 158 /* Mark beginning of a list */
 159
 160 void
 161 cli_begin (struct ui_out *uiout,
 162            enum ui_out_type type,
 163            int level,
 164            const char *id)
 165 {
 166   struct ui_out_data *data = ui_out_data (uiout);
 167   if (data->suppress_output)
 168     return;
 169 }
 170
 171 /* Mark end of a list */
 172
 173 void
 174 cli_end (struct ui_out *uiout,
 175          enum ui_out_type type,
 176          int level)
 177 {
 178   struct ui_out_data *data = ui_out_data (uiout);
 179   if (data->suppress_output)
 180     return;
 181 }
 182
 183 /* output an int field */
 184
 185 void
 186 cli_field_int (struct ui_out *uiout, int fldno, int width,
 187                enum ui_align alignment,
 188                const char *fldname, int value)
 189 {
 190   char buffer[20];              /* FIXME: how many chars long a %d can become? */
 191
 192   struct ui_out_data *data = ui_out_data (uiout);
 193   if (data->suppress_output)
 194     return;
 195   sprintf (buffer, "%d", value);
 196   cli_field_string (uiout, fldno, width, alignment, fldname, buffer);
 197 }
 198
 199 /* used to ommit a field */
 200
 201 void
 202 cli_field_skip (struct ui_out *uiout, int fldno, int width,
 203                 enum ui_align alignment,
 204                 const char *fldname)
 205 {
 206   struct ui_out_data *data = ui_out_data (uiout);
 207   if (data->suppress_output)
 208     return;
 209   cli_field_string (uiout, fldno, width, alignment, fldname, "");
 210 }
 211
 212 /* other specific cli_field_* end up here so alignment and field
 213    separators are both handled by cli_field_string */
 214
 215 void
 216 cli_field_string (struct ui_out *uiout,
 217                   int fldno,
 218                   int width,
 219                   enum ui_align align,
 220                   const char *fldname,
 221                   const char *string)
 222 {
 223   int before = 0;
 224   int after = 0;
 225
 226   struct ui_out_data *data = ui_out_data (uiout);
 227   if (data->suppress_output)
 228     return;
 229
 230   if ((align != ui_noalign) && string)
 231     {
 232       before = width - strlen (string);
 233       if (before <= 0)
 234         before = 0;
 235       else
 236         {
 237           if (align == ui_right)
 238             after = 0;
 239           else if (align == ui_left)
 240             {
 241               after = before;
 242               before = 0;
 243             }
 244           else
 245             /* ui_center */
 246             {
 247               after = before / 2;
 248               before -= after;
 249             }
 250         }
 251     }
 252
 253   if (before)
 254     ui_out_spaces (uiout, before);
 255   if (string)
 256     out_field_fmt (uiout, fldno, fldname, "%s", string);
 257   if (after)
 258     ui_out_spaces (uiout, after);
 259
 260   if (align != ui_noalign)
 261     field_separator ();
 262 }
 263
 264 /* This is the only field function that does not align */
 265
 266 void
 267 cli_field_fmt (struct ui_out *uiout, int fldno,
 268                int width, enum ui_align align,
 269                const char *fldname,
 270                const char *format,
 271                va_list args)
 272 {
 273   struct ui_out_data *data = ui_out_data (uiout);
 274   if (data->suppress_output)
 275     return;
 276
 277   vfprintf_filtered (data->stream, format, args);
 278
 279   if (align != ui_noalign)
 280     field_separator ();
 281 }
 282
 283 void
 284 cli_spaces (struct ui_out *uiout, int numspaces)
 285 {
 286   struct ui_out_data *data = ui_out_data (uiout);
 287   if (data->suppress_output)
 288     return;
 289   print_spaces_filtered (numspaces, data->stream);
 290 }
 291
 292 void
 293 cli_text (struct ui_out *uiout, const char *string)
 294 {
 295   struct ui_out_data *data = ui_out_data (uiout);
 296   if (data->suppress_output)
 297     return;
 298   fputs_filtered (string, data->stream);
 299 }
 300
 301 void
 302 cli_message (struct ui_out *uiout, int verbosity,
 303              const char *format, va_list args)
 304 {
 305   struct ui_out_data *data = ui_out_data (uiout);
 306   if (data->suppress_output)
 307     return;
 308   if (ui_out_get_verblvl (uiout) >= verbosity)
 309     vfprintf_unfiltered (data->stream, format, args);
 310 }
 311
 312 void
 313 cli_wrap_hint (struct ui_out *uiout, char *identstring)
 314 {
 315   struct ui_out_data *data = ui_out_data (uiout);
 316   if (data->suppress_output)
 317     return;
 318   wrap_here (identstring);
 319 }
 320
 321 void
 322 cli_flush (struct ui_out *uiout)
 323 {
 324   struct ui_out_data *data = ui_out_data (uiout);
 325   gdb_flush (data->stream);
 326 }
 327
 328 /* local functions */
 329
 330 /* Like cli_field_fmt, but takes a variable number of args
 331    and makes a va_list and does not insert a separator */
 332
 333 /* VARARGS */
 334 static void
 335 out_field_fmt (struct ui_out *uiout, int fldno,
 336                const char *fldname,
 337                const char *format,...)
 338 {
 339   struct ui_out_data *data = ui_out_data (uiout);
 340   va_list args;
 341
 342   va_start (args, format);
 343   vfprintf_filtered (data->stream, format, args);
 344
 345   va_end (args);
 346 }
 347
 348 /* access to ui_out format private members */
 349
 350 static void
 351 field_separator (void)
 352 {
 353   struct ui_out_data *data = ui_out_data (uiout);
 354   fputc_filtered (' ', data->stream);
 355 }
 356
 357 /* initalize private members at startup */
 358
 359 struct ui_out *
 360 cli_out_new (struct ui_file *stream)
 361 {
 362   int flags = ui_source_list;
 363
 364   struct ui_out_data *data = XMALLOC (struct ui_out_data);
 365   data->stream = stream;
 366   return ui_out_new (&cli_ui_out_impl, data, flags);
 367 }
 368
 369 /* standard gdb initialization hook */
 370 void
 371 _initialize_cli_out (void)
 372 {
 373   /* nothing needs to be done */
 374 }