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/* MI Command Set - MI parser.
Copyright (C) 2000, Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "mi-cmds.h"
#include "mi-parse.h"
#include <ctype.h>
#include <string.h>
#undef XMALLOC
#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
static void
mi_parse_argv (char *args, struct mi_parse *parse)
{
char *chp = args;
int argc = 0;
char **argv = xmalloc ((argc + 1) * sizeof (char *));
argv[argc] = NULL;
while (1)
{
char *arg;
/* skip leading white space */
while (isspace (*chp))
chp++;
/* Three possibilities: EOF, quoted string, or other text. */
switch (*chp)
{
case '\0':
parse->argv = argv;
parse->argc = argc;
return;
case '"':
{
/* A quoted string. */
int len;
char *start = chp + 1;
/* Determine the buffer size. */
chp = start;
len = 0;
while (*chp != '\0' && *chp != '"')
{
if (*chp == '\\')
{
chp++;
if (parse_escape (&chp) <= 0)
{
/* Do not allow split lines or "\000" */
freeargv (argv);
return;
}
}
else
chp++;
len++;
}
/* Insist on a closing quote. */
if (*chp != '"')
{
freeargv (argv);
return;
}
/* Insist on trailing white space. */
if (chp[1] != '\0' && !isspace (chp[1]))
{
freeargv (argv);
return;
}
/* create the buffer. */
arg = xmalloc ((len + 1) * sizeof (char));
/* And copy the characters in. */
chp = start;
len = 0;
while (*chp != '\0' && *chp != '"')
{
if (*chp == '\\')
{
chp++;
arg[len] = parse_escape (&chp);
}
else
arg[len] = *chp++;
len++;
}
arg[len] = '\0';
chp++; /* that closing quote. */
break;
}
default:
{
/* An unquoted string. Accumulate all non blank
characters into a buffer. */
int len;
char *start = chp;
while (*chp != '\0' && !isspace (*chp))
{
chp++;
}
len = chp - start;
arg = xmalloc ((len + 1) * sizeof (char));
strncpy (arg, start, len);
arg[len] = '\0';
break;
}
}
/* Append arg to argv. */
argv = xrealloc (argv, (argc + 2) * sizeof (char *));
argv[argc++] = arg;
argv[argc] = NULL;
}
}
void
mi_parse_free (struct mi_parse *parse)
{
if (parse == NULL)
return;
if (parse->command != NULL)
free (parse->command);
if (parse->token != NULL)
free (parse->token);
if (parse->args != NULL)
free (parse->args);
if (parse->argv != NULL)
freeargv (parse->argv);
free (parse);
}
struct mi_parse *
mi_parse (char *cmd)
{
char *chp;
struct mi_parse *parse = XMALLOC (struct mi_parse);
memset (parse, 0, sizeof (*parse));
/* Before starting, skip leading white space. */
while (isspace (*cmd))
cmd++;
/* Find/skip any token and then extract it. */
for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++)
;
parse->token = xmalloc ((chp - cmd + 1) * sizeof (char *));
memcpy (parse->token, cmd, (chp - cmd));
parse->token[chp - cmd] = '\0';
/* This wasn't a real MI command. Return it as a CLI_COMMAND. */
if (*chp != '-')
{
while (isspace (*chp))
chp++;
parse->command = xstrdup (chp);
parse->op = CLI_COMMAND;
return parse;
}
/* Extract the command. */
{
char *tmp = chp + 1; /* discard ``-'' */
for (; *chp && !isspace (*chp); chp++)
;
parse->command = xmalloc ((chp - tmp + 1) * sizeof (char *));
memcpy (parse->command, tmp, chp - tmp);
parse->command[chp - tmp] = '\0';
}
/* Find the command in the MI table. */
parse->cmd = mi_lookup (parse->command);
if (parse->cmd == NULL)
{
/* FIXME: This should be a function call. */
fprintf_unfiltered
(raw_stdout,
"%s^error,msg=\"Undefined MI command: %s\"\n",
parse->token, parse->command);
mi_parse_free (parse);
return NULL;
}
/* Skip white space following the command. */
while (isspace (*chp))
chp++;
/* For new argv commands, attempt to return the parsed argument
list. */
if (parse->cmd->argv_func != NULL)
{
mi_parse_argv (chp, parse);
if (parse->argv == NULL)
{
/* FIXME: This should be a function call. */
fprintf_unfiltered
(raw_stdout,
"%s^error,msg=\"Problem parsing arguments: %s %s\"\n",
parse->token, parse->command, chp);
mi_parse_free (parse);
return NULL;
}
}
/* FIXME: DELETE THIS */
/* For CLI and old ARGS commands, also return the remainder of the
command line as a single string. */
if (parse->cmd->args_func != NULL
|| parse->cmd->cli != NULL)
{
parse->args = xstrdup (chp);
}
/* Fully parsed. */
parse->op = MI_COMMAND;
return parse;
}
void
_initialize_mi_parse ()
{
}
/* Local variables: */
/* change-log-default-name: "ChangeLog-mi" */
/* End: */
|
