| /* MI Command Set - MI parser. |
| |
| Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
| |
| Contributed by Cygnus Solutions (a Red Hat company). |
| |
| 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 "gdb_string.h" |
| |
| 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) |
| xfree (parse->command); |
| if (parse->token != NULL) |
| xfree (parse->token); |
| if (parse->args != NULL) |
| xfree (parse->args); |
| if (parse->argv != NULL) |
| freeargv (parse->argv); |
| xfree (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.cmd != NULL) |
| { |
| parse->args = xstrdup (chp); |
| } |
| |
| /* Fully parsed. */ |
| parse->op = MI_COMMAND; |
| return parse; |
| } |