| /* MI Command Set - MI parser. |
| |
| Copyright (C) 2000-2013 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "mi-cmds.h" |
| #include "mi-parse.h" |
| #include "charset.h" |
| |
| #include <ctype.h> |
| #include "gdb_string.h" |
| #include "cli/cli-utils.h" |
| |
| /* Like parse_escape, but leave the results as a host char, not a |
| target char. */ |
| |
| static int |
| mi_parse_escape (const char **string_ptr) |
| { |
| int c = *(*string_ptr)++; |
| |
| switch (c) |
| { |
| case '\n': |
| return -2; |
| case 0: |
| (*string_ptr)--; |
| return 0; |
| |
| case '0': |
| case '1': |
| case '2': |
| case '3': |
| case '4': |
| case '5': |
| case '6': |
| case '7': |
| { |
| int i = host_hex_value (c); |
| int count = 0; |
| |
| while (++count < 3) |
| { |
| c = (**string_ptr); |
| if (isdigit (c) && c != '8' && c != '9') |
| { |
| (*string_ptr)++; |
| i *= 8; |
| i += host_hex_value (c); |
| } |
| else |
| { |
| break; |
| } |
| } |
| return i; |
| } |
| |
| case 'a': |
| c = '\a'; |
| break; |
| case 'b': |
| c = '\b'; |
| break; |
| case 'f': |
| c = '\f'; |
| break; |
| case 'n': |
| c = '\n'; |
| break; |
| case 'r': |
| c = '\r'; |
| break; |
| case 't': |
| c = '\t'; |
| break; |
| case 'v': |
| c = '\v'; |
| break; |
| |
| default: |
| break; |
| } |
| |
| return c; |
| } |
| |
| static void |
| mi_parse_argv (const char *args, struct mi_parse *parse) |
| { |
| const char *chp = args; |
| int argc = 0; |
| char **argv = xmalloc ((argc + 1) * sizeof (char *)); |
| |
| argv[argc] = NULL; |
| while (1) |
| { |
| char *arg; |
| |
| /* Skip leading white space. */ |
| chp = skip_spaces_const (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; |
| const char *start = chp + 1; |
| |
| /* Determine the buffer size. */ |
| chp = start; |
| len = 0; |
| while (*chp != '\0' && *chp != '"') |
| { |
| if (*chp == '\\') |
| { |
| chp++; |
| if (mi_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 and copy characters in. */ |
| arg = xmalloc ((len + 1) * sizeof (char)); |
| chp = start; |
| len = 0; |
| while (*chp != '\0' && *chp != '"') |
| { |
| if (*chp == '\\') |
| { |
| chp++; |
| arg[len] = mi_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; |
| const 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); |
| } |
| |
| /* A cleanup that calls mi_parse_free. */ |
| |
| static void |
| mi_parse_cleanup (void *arg) |
| { |
| mi_parse_free (arg); |
| } |
| |
| struct mi_parse * |
| mi_parse (const char *cmd, char **token) |
| { |
| const char *chp; |
| struct mi_parse *parse = XMALLOC (struct mi_parse); |
| struct cleanup *cleanup; |
| |
| memset (parse, 0, sizeof (*parse)); |
| parse->all = 0; |
| parse->thread_group = -1; |
| parse->thread = -1; |
| parse->frame = -1; |
| |
| cleanup = make_cleanup (mi_parse_cleanup, parse); |
| |
| /* Before starting, skip leading white space. */ |
| cmd = skip_spaces_const (cmd); |
| |
| /* Find/skip any token and then extract it. */ |
| for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++) |
| ; |
| *token = xmalloc (chp - cmd + 1); |
| memcpy (*token, cmd, (chp - cmd)); |
| (*token)[chp - cmd] = '\0'; |
| |
| /* This wasn't a real MI command. Return it as a CLI_COMMAND. */ |
| if (*chp != '-') |
| { |
| chp = skip_spaces_const (chp); |
| parse->command = xstrdup (chp); |
| parse->op = CLI_COMMAND; |
| |
| discard_cleanups (cleanup); |
| |
| return parse; |
| } |
| |
| /* Extract the command. */ |
| { |
| const char *tmp = chp + 1; /* discard ``-'' */ |
| |
| for (; *chp && !isspace (*chp); chp++) |
| ; |
| parse->command = xmalloc (chp - tmp + 1); |
| 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) |
| error (_("Undefined MI command: %s"), parse->command); |
| |
| /* Skip white space following the command. */ |
| chp = skip_spaces_const (chp); |
| |
| /* Parse the --thread and --frame options, if present. At present, |
| some important commands, like '-break-*' are implemented by |
| forwarding to the CLI layer directly. We want to parse --thread |
| and --frame here, so as not to leave those option in the string |
| that will be passed to CLI. */ |
| for (;;) |
| { |
| const char *option; |
| size_t as = sizeof ("--all ") - 1; |
| size_t tgs = sizeof ("--thread-group ") - 1; |
| size_t ts = sizeof ("--thread ") - 1; |
| size_t fs = sizeof ("--frame ") - 1; |
| |
| if (strncmp (chp, "--all ", as) == 0) |
| { |
| parse->all = 1; |
| chp += as; |
| } |
| /* See if --all is the last token in the input. */ |
| if (strcmp (chp, "--all") == 0) |
| { |
| parse->all = 1; |
| chp += strlen (chp); |
| } |
| if (strncmp (chp, "--thread-group ", tgs) == 0) |
| { |
| char *endp; |
| |
| option = "--thread-group"; |
| if (parse->thread_group != -1) |
| error (_("Duplicate '--thread-group' option")); |
| chp += tgs; |
| if (*chp != 'i') |
| error (_("Invalid thread group id")); |
| chp += 1; |
| parse->thread_group = strtol (chp, &endp, 10); |
| chp = endp; |
| } |
| else if (strncmp (chp, "--thread ", ts) == 0) |
| { |
| char *endp; |
| |
| option = "--thread"; |
| if (parse->thread != -1) |
| error (_("Duplicate '--thread' option")); |
| chp += ts; |
| parse->thread = strtol (chp, &endp, 10); |
| chp = endp; |
| } |
| else if (strncmp (chp, "--frame ", fs) == 0) |
| { |
| char *endp; |
| |
| option = "--frame"; |
| if (parse->frame != -1) |
| error (_("Duplicate '--frame' option")); |
| chp += fs; |
| parse->frame = strtol (chp, &endp, 10); |
| chp = endp; |
| } |
| else |
| break; |
| |
| if (*chp != '\0' && !isspace (*chp)) |
| error (_("Invalid value for the '%s' option"), option); |
| chp = skip_spaces_const (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) |
| error (_("Problem parsing arguments: %s %s"), parse->command, chp); |
| } |
| |
| /* FIXME: DELETE THIS */ |
| /* For CLI commands, also return the remainder of the |
| command line as a single string. */ |
| if (parse->cmd->cli.cmd != NULL) |
| parse->args = xstrdup (chp); |
| |
| discard_cleanups (cleanup); |
| |
| /* Fully parsed, flag as an MI command. */ |
| parse->op = MI_COMMAND; |
| return parse; |
| } |