#include <data/settings.h>
#include <data/variable.h>
#include <language/lexer/lexer.h>
+#include <language/line-buffer.h>
#include <libpspp/alloc.h>
+#include <libpspp/assertion.h>
#include <libpspp/compiler.h>
#include <libpspp/message.h>
#include <libpspp/message.h>
{
F_ENHANCED = 0x10, /* Allowed only in enhanced syntax mode. */
F_TESTING = 0x20, /* Allowed only in testing mode. */
- F_KEEP_FINAL_TOKEN = 0x40 /* Don't skip final token in command name. */
+ F_KEEP_FINAL_TOKEN = 0x40,/* Don't skip final token in command name. */
+ F_ABBREV = 0x80 /* Not a candidate for name completion. */
};
/* A single command. */
static const size_t command_cnt = sizeof commands / sizeof *commands;
-static bool verify_valid_command (const struct command *, enum cmd_state);
+static bool in_correct_state (const struct command *, enum cmd_state);
+static bool report_state_mismatch (const struct command *, enum cmd_state);
static const struct command *find_command (const char *name);
+static void set_completion_state (enum cmd_state);
\f
/* Command parser. */
const struct command *command;
enum cmd_result result;
- /* Null commands can result from extra empty lines. */
- if (token == '.')
- return CMD_SUCCESS;
+ /* Read the command's first token. */
+ getl_set_prompt_style (GETL_PROMPT_FIRST);
+ set_completion_state (state);
+ lex_get ();
+ if (token == T_STOP)
+ return CMD_EOF;
+ else if (token == '.')
+ {
+ /* Null commands can result from extra empty lines. */
+ return CMD_SUCCESS;
+ }
+ getl_set_prompt_style (GETL_PROMPT_LATER);
/* Parse the command name. */
command = parse_command_name ();
command->name);
return CMD_FAILURE;
}
- else if (!verify_valid_command (command, state))
- return CMD_FAILURE;
+ else if (!in_correct_state (command, state))
+ {
+ report_state_mismatch (command, state);
+ return CMD_FAILURE;
+ }
/* Execute command. */
msg_set_command_name (command->name);
return string;
}
-/* Returns nonzero if strings A and B can be confused based on
+/* Returns true if strings A and B can be confused based on
their first three letters. */
-static int
+static bool
conflicting_3char_prefixes (const char *a, const char *b)
{
size_t aw_len, bw_len;
/* Words that are the same don't conflict. */
if (aw_len == bw_len && !buf_compare_case (aw, bw, aw_len))
- return 0;
+ return false;
/* Words that are otherwise the same in the first three letters
do conflict. */
|| (bw_len == 3 && aw_len > 3)) && !buf_compare_case (aw, bw, 3);
}
-/* Returns nonzero if CMD can be confused with another command
+/* Returns true if CMD can be confused with another command
based on the first three letters of its first word. */
-static int
+static bool
conflicting_3char_prefix_command (const struct command *cmd)
{
assert (cmd >= commands && cmd < commands + command_cnt);
for (cmd = commands; cmd < commands + command_cnt; cmd++)
if (!strcmp (cmd->name, name))
return cmd;
- abort ();
+ NOT_REACHED ();
}
/* Frees the WORD_CNT words in WORDS. */
struct string s;
size_t i;
- ds_init (&s);
+ ds_init_empty (&s);
for (i = 0; i < word_cnt; i++)
{
if (i != 0)
- ds_putc (&s, ' ');
- ds_puts (&s, words[i]);
+ ds_put_char (&s, ' ');
+ ds_put_cstr (&s, words[i]);
}
- msg (SE, _("Unknown command %s."), ds_c_str (&s));
+ msg (SE, _("Unknown command %s."), ds_cstr (&s));
ds_destroy (&s);
}
assert (word_cnt < sizeof words / sizeof *words);
if (token == T_ID)
{
- words[word_cnt] = xstrdup (ds_c_str (&tokstr));
+ words[word_cnt] = ds_xstrdup (&tokstr);
str_uppercase (words[word_cnt]);
}
else if (token == '-')
}
/* Returns true if COMMAND is allowed in STATE,
- false otherwise.
- If COMMAND is not allowed, emits an appropriate error
- message. */
+ false otherwise. */
static bool
-verify_valid_command (const struct command *command, enum cmd_state state)
+in_correct_state (const struct command *command, enum cmd_state state)
{
- if ((state == CMD_STATE_INITIAL && command->states & S_INITIAL)
- || (state == CMD_STATE_DATA && command->states & S_DATA)
- || (state == CMD_STATE_INPUT_PROGRAM
- && command->states & S_INPUT_PROGRAM)
- || (state == CMD_STATE_FILE_TYPE && command->states & S_FILE_TYPE))
- return true;
+ return ((state == CMD_STATE_INITIAL && command->states & S_INITIAL)
+ || (state == CMD_STATE_DATA && command->states & S_DATA)
+ || (state == CMD_STATE_INPUT_PROGRAM
+ && command->states & S_INPUT_PROGRAM)
+ || (state == CMD_STATE_FILE_TYPE && command->states & S_FILE_TYPE));
+}
+/* Emits an appropriate error message for trying to invoke
+ COMMAND in STATE. */
+static bool
+report_state_mismatch (const struct command *command, enum cmd_state state)
+{
+ assert (!in_correct_state (command, state));
if (state == CMD_STATE_INITIAL || state == CMD_STATE_DATA)
{
const char *allowed[3];
else if (allowed_cnt == 3)
s = xasprintf (_("%s, %s, or %s"), allowed[0], allowed[1], allowed[2]);
else
- abort ();
+ NOT_REACHED ();
msg (SE, _("%s is allowed only %s."), command->name, s);
return false;
}
\f
-/* Readline command name completion. */
+/* Command name completion. */
-#if HAVE_READLINE
-static char *command_generator (const char *text, int state);
-
-/* Returns a set of completions for TEXT.
- This is of the proper form for assigning to
- rl_attempted_completion_function. */
-char **
-pspp_attempted_completion_function (const char *text,
- int start, int end UNUSED)
+static enum cmd_state completion_state = CMD_STATE_INITIAL;
+
+static void
+set_completion_state (enum cmd_state state)
{
- if (start == 0)
- {
- /* Complete command name at start of line. */
- return rl_completion_matches (text, command_generator);
- }
- else
- {
- /* Otherwise don't do any completion. */
- rl_attempted_completion_over = 1;
- return NULL;
- }
+ completion_state = state;
}
-/* If STATE is 0, returns the first command name matching TEXT.
- Otherwise, returns the next command name matching TEXT.
- Returns a null pointer when no matches are left. */
-static char *
-command_generator (const char *text, int state)
+/* Returns the next possible completion of a command name that
+ begins with PREFIX, in the current command state, or a null
+ pointer if no completions remain.
+ Before calling the first time, set *CMD to a null pointer. */
+const char *
+cmd_complete (const char *prefix, const struct command **cmd)
{
- static const struct command *cmd;
-
- if (!state)
- cmd = commands;
-
- for (; cmd < commands + command_cnt; cmd++)
- if (!memcasecmp (cmd->name, text, strlen (text))
- && (!(cmd->flags & F_TESTING) || get_testing_mode ())
- && (!(cmd->flags & F_ENHANCED) || get_syntax () == ENHANCED))
- return xstrdup (cmd++->name);
+ if (*cmd == NULL)
+ *cmd = commands;
+
+ for (; *cmd < commands + command_cnt; (*cmd)++)
+ if (!memcasecmp ((*cmd)->name, prefix, strlen (prefix))
+ && (!((*cmd)->flags & F_TESTING) || get_testing_mode ())
+ && (!((*cmd)->flags & F_ENHANCED) || get_syntax () == ENHANCED)
+ && !((*cmd)->flags & F_ABBREV)
+ && ((*cmd)->function != NULL)
+ && in_correct_state (*cmd, completion_state))
+ return (*cmd)++->name;
return NULL;
}
-#endif /* HAVE_READLINE */
\f
/* Simple commands. */
if (!lex_force_string ())
return CMD_FAILURE;
- if (remove (ds_c_str (&tokstr)) == -1)
+ if (remove (ds_cstr (&tokstr)) == -1)
{
msg (SW, _("Error removing `%s': %s."),
- ds_c_str (&tokstr), strerror (errno));
+ ds_cstr (&tokstr), strerror (errno));
return CMD_FAILURE;
}
lex_get ();
if (!lex_force_string ())
return CMD_FAILURE;
- cmd = ds_c_str (&tokstr);
+ cmd = ds_cstr (&tokstr);
string = 1;
}
else
projects / pspp-builds.git / blobdiff