Clean up "completer_handle_brkchars" callback handling
This patch cleans up "completer_handle_brkchars" callback handling: - Renames the function typedef to better match its intent: completer_ftype_void -> completer_handle_brkchars_ftype - Factors out common code in complete_line_internal handling the "handle_brkchars" callback to a separate function. - Centralizes all the "completer method" to "handle_brkchars method" mapping in a single function. gdb/ChangeLog: 2017-07-17 Pedro Alves <palves@redhat.com> * cli/cli-decode.c (set_cmd_completer_handle_brkchars): Adjust to renames. * cli/cli-decode.h (struct cmd_list_element) <completer>: Move comments to completer_ftype's declaration. <completer_handle_brkchars>: Change type to completer_handle_brkchars_ftype. * command.h (completer_ftype): Add describing comment and give names to parameters. (completer_ftype_void): Rename to ... (completer_handle_brkchars_ftype) ... this. Add describing comment. (set_cmd_completer_handle_brkchars): Adjust. * completer.c (filename_completer_handle_brkchars): New function. (complete_line_internal_normal_command): New function, factored out from ... (complete_line_internal): ... here. (command_completer_handle_brkchars) (default_completer_handle_brkchars) (completer_handle_brkchars_func_for_completer): New functions. * completer.h (set_gdb_completion_word_break_characters): Delete declaration. (completer_handle_brkchars_func_for_completer): New declaration. * python/py-cmd.c (cmdpy_completer_handle_brkchars): Adjust to use completer_handle_brkchars_func_for_completer.
This commit is contained in:
Pedro Alves
parent
78b13106ed
commit
6e1dbf8cda
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@ -1,3 +1,29 @@
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2017-07-17 Pedro Alves <palves@redhat.com>
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* cli/cli-decode.c (set_cmd_completer_handle_brkchars): Adjust to
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renames.
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* cli/cli-decode.h (struct cmd_list_element) <completer>: Move
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comments to completer_ftype's declaration.
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<completer_handle_brkchars>: Change type to
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completer_handle_brkchars_ftype.
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* command.h (completer_ftype): Add describing comment and give
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names to parameters.
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(completer_ftype_void): Rename to ...
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(completer_handle_brkchars_ftype) ... this. Add describing comment.
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(set_cmd_completer_handle_brkchars): Adjust.
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* completer.c (filename_completer_handle_brkchars): New function.
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(complete_line_internal_normal_command): New function, factored
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out from ...
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(complete_line_internal): ... here.
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(command_completer_handle_brkchars)
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(default_completer_handle_brkchars)
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(completer_handle_brkchars_func_for_completer): New functions.
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* completer.h (set_gdb_completion_word_break_characters): Delete
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declaration.
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(completer_handle_brkchars_func_for_completer): New declaration.
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* python/py-cmd.c (cmdpy_completer_handle_brkchars): Adjust to use
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completer_handle_brkchars_func_for_completer.
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2017-07-17 Pedro Alves <palves@redhat.com>
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* completer.c (symbol_completer): New function, based on
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@ -166,9 +166,9 @@ set_cmd_completer (struct cmd_list_element *cmd, completer_ftype *completer)
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void
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set_cmd_completer_handle_brkchars (struct cmd_list_element *cmd,
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completer_ftype_void *completer_handle_brkchars)
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completer_handle_brkchars_ftype *func)
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{
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cmd->completer_handle_brkchars = completer_handle_brkchars;
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cmd->completer_handle_brkchars = func;
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}
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/* Add element named NAME.
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@ -160,19 +160,7 @@ struct cmd_list_element
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/* The prefix command of this command. */
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struct cmd_list_element *prefix;
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/* Completion routine for this command. TEXT is the text beyond
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what was matched for the command itself (leading whitespace is
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skipped). It stops where we are supposed to stop completing
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(rl_point) and is '\0' terminated.
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Return value is a malloc'd vector of pointers to possible
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completions terminated with NULL. If there are no completions,
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returning a pointer to a NULL would work but returning NULL
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itself is also valid. WORD points in the same buffer as TEXT,
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and completions should be returned relative to this position.
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For example, suppose TEXT is "foo" and we want to complete to
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"foobar". If WORD is "oo", return "oobar"; if WORD is
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"baz/foo", return "baz/foobar". */
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/* Completion routine for this command. */
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completer_ftype *completer;
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/* Handle the word break characters for this completer. Usually
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@ -181,8 +169,7 @@ struct cmd_list_element
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a class) the word break chars may need to be redefined
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depending on the completer type (e.g., for filename
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completers). */
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completer_ftype_void *completer_handle_brkchars;
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completer_handle_brkchars_ftype *completer_handle_brkchars;
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/* Destruction routine for this command. If non-NULL, this is
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called when this command instance is destroyed. This may be
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@ -174,18 +174,28 @@ typedef void cmd_sfunc_ftype (char *args, int from_tty,
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extern void set_cmd_sfunc (struct cmd_list_element *cmd,
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cmd_sfunc_ftype *sfunc);
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typedef VEC (char_ptr) *completer_ftype (struct cmd_list_element *,
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const char *, const char *);
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/* A completion routine. Return a list of possible completions.
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typedef void completer_ftype_void (struct cmd_list_element *,
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const char *, const char *);
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TEXT is the text beyond what was matched for the command itself
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(leading whitespace is skipped). It stops where we are supposed to
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stop completing (rl_point) and is '\0' terminated. WORD points in
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the same buffer as TEXT, and completions should be returned
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relative to this position. For example, suppose TEXT is "foo" and
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we want to complete to "foobar". If WORD is "oo", return "oobar";
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if WORD is "baz/foo", return "baz/foobar". */
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typedef VEC (char_ptr) *completer_ftype (struct cmd_list_element *,
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const char *text, const char *word);
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/* Same, but for set_cmd_completer_handle_brkchars. */
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typedef void completer_handle_brkchars_ftype (struct cmd_list_element *,
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const char *text, const char *word);
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extern void set_cmd_completer (struct cmd_list_element *, completer_ftype *);
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/* Set the completer_handle_brkchars callback. */
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extern void set_cmd_completer_handle_brkchars (struct cmd_list_element *,
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completer_ftype_void *);
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completer_handle_brkchars_ftype *);
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/* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
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around in cmd objects to test the value of the commands sfunc(). */
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139
gdb/completer.c
139
gdb/completer.c
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@ -132,6 +132,7 @@ noop_completer (struct cmd_list_element *ignore,
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}
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/* Complete on filenames. */
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VEC (char_ptr) *
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filename_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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@ -192,6 +193,17 @@ filename_completer (struct cmd_list_element *ignore,
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return return_val;
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}
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/* The corresponding completer_handle_brkchars
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implementation. */
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static void
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filename_completer_handle_brkchars (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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set_rl_completer_word_break_characters
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(gdb_completer_file_name_break_characters);
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}
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/* Complete on linespecs, which might be of two possible forms:
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file:line
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@ -703,6 +715,51 @@ typedef enum
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}
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complete_line_internal_reason;
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/* Helper for complete_line_internal to simplify it. */
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static VEC (char_ptr) *
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complete_line_internal_normal_command (const char *command, const char *word,
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const char *cmd_args,
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complete_line_internal_reason reason,
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struct cmd_list_element *c)
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{
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const char *p = cmd_args;
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if (c->completer == filename_completer)
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{
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/* Many commands which want to complete on file names accept
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several file names, as in "run foo bar >>baz". So we don't
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want to complete the entire text after the command, just the
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last word. To this end, we need to find the beginning of the
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file name by starting at `word' and going backwards. */
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for (p = word;
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p > command
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&& strchr (gdb_completer_file_name_break_characters,
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p[-1]) == NULL;
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p--)
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;
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}
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if (reason == handle_brkchars)
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{
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completer_handle_brkchars_ftype *brkchars_fn;
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if (c->completer_handle_brkchars != NULL)
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brkchars_fn = c->completer_handle_brkchars;
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else
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{
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brkchars_fn
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= (completer_handle_brkchars_func_for_completer
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(c->completer));
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}
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brkchars_fn (c, p, word);
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}
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if (reason != handle_brkchars && c->completer != NULL)
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return (*c->completer) (c, p, word);
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return NULL;
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}
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/* Internal function used to handle completions.
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@ -872,29 +929,9 @@ complete_line_internal (const char *text,
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{
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/* It is a normal command; what comes after it is
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completed by the command's completer function. */
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if (c->completer == filename_completer)
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{
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/* Many commands which want to complete on
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file names accept several file names, as
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in "run foo bar >>baz". So we don't want
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to complete the entire text after the
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command, just the last word. To this
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end, we need to find the beginning of the
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file name by starting at `word' and going
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backwards. */
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for (p = word;
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p > tmp_command
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&& strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL;
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p--)
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;
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set_rl_completer_word_break_characters
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(gdb_completer_file_name_break_characters);
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}
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if (reason == handle_brkchars
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&& c->completer_handle_brkchars != NULL)
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(*c->completer_handle_brkchars) (c, p, word);
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if (reason != handle_brkchars && c->completer != NULL)
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list = (*c->completer) (c, p, word);
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list = complete_line_internal_normal_command (tmp_command,
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word, p,
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reason, c);
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}
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}
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else
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@ -945,24 +982,9 @@ complete_line_internal (const char *text,
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else
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{
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/* It is a normal command. */
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if (c->completer == filename_completer)
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{
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/* See the commentary above about the specifics
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of file-name completion. */
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for (p = word;
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p > tmp_command
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&& strchr (gdb_completer_file_name_break_characters,
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p[-1]) == NULL;
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p--)
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;
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set_rl_completer_word_break_characters
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(gdb_completer_file_name_break_characters);
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}
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if (reason == handle_brkchars
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&& c->completer_handle_brkchars != NULL)
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(*c->completer_handle_brkchars) (c, p, word);
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if (reason != handle_brkchars && c->completer != NULL)
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list = (*c->completer) (c, p, word);
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list = complete_line_internal_normal_command (tmp_command,
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word, p,
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reason, c);
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}
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}
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}
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@ -1116,6 +1138,7 @@ complete_line (const char *text, const char *line_buffer, int point)
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}
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/* Complete on command names. Used by "help". */
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VEC (char_ptr) *
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command_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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@ -1124,6 +1147,16 @@ command_completer (struct cmd_list_element *ignore,
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strlen (text), handle_help);
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}
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/* The corresponding completer_handle_brkchars implementation. */
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static void
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command_completer_handle_brkchars (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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set_rl_completer_word_break_characters
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(gdb_completer_command_word_break_characters);
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}
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/* Complete on signals. */
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VEC (char_ptr) *
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@ -1232,6 +1265,30 @@ reggroup_completer (struct cmd_list_element *ignore,
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complete_reggroup_names);
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}
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/* The default completer_handle_brkchars implementation. */
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static void
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default_completer_handle_brkchars (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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set_rl_completer_word_break_characters
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(current_language->la_word_break_characters ());
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}
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/* See definition in completer.h. */
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completer_handle_brkchars_ftype *
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completer_handle_brkchars_func_for_completer (completer_ftype *fn)
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{
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if (fn == filename_completer)
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return filename_completer_handle_brkchars;
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if (fn == command_completer)
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return command_completer_handle_brkchars;
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return default_completer_handle_brkchars;
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}
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/* Get the list of chars that are considered as word breaks
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for the current command. */
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@ -112,12 +112,14 @@ extern char *gdb_completion_word_break_characters (void);
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not "const char *". */
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extern void set_rl_completer_word_break_characters (const char *break_chars);
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/* Set the word break characters array to the corresponding set of
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chars, based on FN. This function is useful for cases when the
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completer doesn't know the type of the completion until some
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/* Get the matching completer_handle_brkchars_ftype function for FN.
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FN is one of the core completer functions above (filename,
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location, symbol, etc.). This function is useful for cases when
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the completer doesn't know the type of the completion until some
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calculation is done (e.g., for Python functions). */
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extern void set_gdb_completion_word_break_characters (completer_ftype *fn);
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extern completer_handle_brkchars_ftype *
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completer_handle_brkchars_func_for_completer (completer_ftype *fn);
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/* Exported to linespec.c */
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@ -293,11 +293,14 @@ cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
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}
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else if (value >= 0 && value < (long) N_COMPLETERS)
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{
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completer_handle_brkchars_ftype *brkchars_fn;
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/* This is the core of this function. Depending on which
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completer type the Python function returns, we have to
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adjust the break characters accordingly. */
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set_gdb_completion_word_break_characters
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(completers[value].completer);
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brkchars_fn = (completer_handle_brkchars_func_for_completer
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(completers[value].completer));
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brkchars_fn (command, text, word);
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}
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}
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}
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