gdb/linespec.h

   1 /* Header for GDB line completion.
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #if !defined (LINESPEC_H)
  18 #define LINESPEC_H 1
  19
  20 struct symtab;
  21
  22 #include "vec.h"
  23
  24 /* Flags to pass to decode_line_1 and decode_line_full.  */
  25
  26 enum decode_line_flags
  27   {
  28     /* Set this flag if you want the resulting SALs to describe the
  29        first line of indicated functions.  */
  30     DECODE_LINE_FUNFIRSTLINE = 1,
  31
  32     /* Set this flag if you want "list mode".  In this mode, a
  33        FILE:LINE linespec will always return a result, and such
  34        linespecs will not be expanded to all matches.  */
  35     DECODE_LINE_LIST_MODE = 2
  36   };
  37
  38 /* decode_line_full returns a vector of these.  */
  39
  40 struct linespec_sals
  41 {
  42   /* This is the linespec corresponding to the sals contained in this
  43      object.  It can be passed as the FILTER argument to future calls
  44      to decode_line_full.  This is freed by
  45      destroy_linespec_result.  */
  46   char *canonical;
  47
  48   /* Sals.  The 'sals' field is destroyed by
  49      destroy_linespec_result.  */
  50   struct symtabs_and_lines sals;
  51 };
  52
  53 typedef struct linespec_sals linespec_sals;
  54 DEF_VEC_O (linespec_sals);
  55
  56 /* An instance of this may be filled in by decode_line_1.  The caller
  57    must call init_linespec_result to initialize it and
  58    destroy_linespec_result to destroy it.  The caller must make copies
  59    of any data that it needs to keep.  */
  60
  61 struct linespec_result
  62 {
  63   /* If non-zero, the linespec should be displayed to the user.  This
  64      is used by "unusual" linespecs where the ordinary `info break'
  65      display mechanism would do the wrong thing.  */
  66   int special_display;
  67
  68   /* If non-zero, the linespec result should be considered to be a
  69      "pre-expanded" multi-location linespec.  A pre-expanded linespec
  70      holds all matching locations in a single linespec_sals
  71      object.  */
  72   int pre_expanded;
  73
  74   /* If PRE_EXPANDED is non-zero, this is set to the linespec entered
  75      by the user.  This will be freed by destroy_linespec_result.  */
  76   char *addr_string;
  77
  78   /* The sals.  The vector will be freed by
  79      destroy_linespec_result.  */
  80   VEC (linespec_sals) *sals;
  81 };
  82
  83 /* Initialize a linespec_result.  */
  84
  85 extern void init_linespec_result (struct linespec_result *);
  86
  87 /* Destroy a linespec_result.  */
  88
  89 extern void destroy_linespec_result (struct linespec_result *);
  90
  91 /* Return a cleanup that destroys a linespec_result.  */
  92
  93 extern struct cleanup *
  94         make_cleanup_destroy_linespec_result (struct linespec_result *);
  95
  96 /* Decode a linespec using the provided default symtab and line.  */
  97
  98 extern struct symtabs_and_lines
  99         decode_line_1 (char **argptr, int flags,
 100                        struct symtab *default_symtab, int default_line);
 101
 102 /* Parse *ARGPTR as a linespec and return results.  This is the "full"
 103    interface to this module, which handles multiple results
 104    properly.
 105
 106    For FLAGS, see decode_line_flags.  DECODE_LINE_LIST_MODE is not
 107    valid for this function.
 108
 109    DEFAULT_SYMTAB and DEFAULT_LINE describe the default location.
 110    DEFAULT_SYMTAB can be NULL, in which case the current symtab and
 111    line are used.
 112
 113    CANONICAL is where the results are stored.  It must not be NULL.
 114
 115    SELECT_MODE must be one of the multiple_symbols_* constants, or
 116    NULL.  It determines how multiple results will be handled.  If
 117    NULL, the appropriate CLI value will be used.
 118
 119    FILTER can either be NULL or a string holding a canonical name.
 120    This is only valid when SELECT_MODE is multiple_symbols_all.
 121
 122    Multiple results are handled differently depending on the
 123    arguments:
 124
 125    . With multiple_symbols_cancel, an exception is thrown.
 126
 127    . With multiple_symbols_ask, a menu is presented to the user.  The
 128    user may select none, in which case an exception is thrown; or all,
 129    which is handled like multiple_symbols_all, below.  Otherwise,
 130    CANONICAL->SALS will have one entry for each name the user chose.
 131
 132    . With multiple_symbols_all, CANONICAL->SALS will have a single
 133    entry describing all the matching locations.  If FILTER is
 134    non-NULL, then only locations whose canonical name is equal (in the
 135    strcmp sense) to FILTER will be returned; all others will be
 136    filtered out.  */
 137
 138 extern void decode_line_full (char **argptr, int flags,
 139                               struct symtab *default_symtab, int default_line,
 140                               struct linespec_result *canonical,
 141                               const char *select_mode,
 142                               const char *filter);
 143
 144 /* Given a string, return the line specified by it, using the current
 145    source symtab and line as defaults.
 146    This is for commands like "list" and "breakpoint".  */
 147
 148 extern struct symtabs_and_lines decode_line_with_current_source (char *, int);
 149
 150 /* Given a string, return the line specified by it, using the last displayed
 151    codepoint's values as defaults, or nothing if they aren't valid.  */
 152
 153 extern struct symtabs_and_lines decode_line_with_last_displayed (char *, int);
 154
 155 #endif /* defined (LINESPEC_H) */