Commit | Line | Data |
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fb40c209 | 1 | /* MI Command Set - MI parser. |
349c5d5f AC |
2 | |
3 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. | |
4 | ||
ab91fdd5 | 5 | Contributed by Cygnus Solutions (a Red Hat company). |
fb40c209 AC |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | #include "defs.h" | |
25 | #include "mi-cmds.h" | |
26 | #include "mi-parse.h" | |
27 | ||
28 | #include <ctype.h> | |
27b82ed2 | 29 | #include "gdb_string.h" |
fb40c209 | 30 | |
fb40c209 AC |
31 | static void |
32 | mi_parse_argv (char *args, struct mi_parse *parse) | |
33 | { | |
34 | char *chp = args; | |
35 | int argc = 0; | |
36 | char **argv = xmalloc ((argc + 1) * sizeof (char *)); | |
37 | argv[argc] = NULL; | |
38 | while (1) | |
39 | { | |
40 | char *arg; | |
41 | /* skip leading white space */ | |
42 | while (isspace (*chp)) | |
43 | chp++; | |
44 | /* Three possibilities: EOF, quoted string, or other text. */ | |
45 | switch (*chp) | |
46 | { | |
47 | case '\0': | |
48 | parse->argv = argv; | |
49 | parse->argc = argc; | |
50 | return; | |
51 | case '"': | |
52 | { | |
53 | /* A quoted string. */ | |
54 | int len; | |
55 | char *start = chp + 1; | |
56 | /* Determine the buffer size. */ | |
57 | chp = start; | |
58 | len = 0; | |
59 | while (*chp != '\0' && *chp != '"') | |
60 | { | |
61 | if (*chp == '\\') | |
62 | { | |
63 | chp++; | |
64 | if (parse_escape (&chp) <= 0) | |
65 | { | |
66 | /* Do not allow split lines or "\000" */ | |
67 | freeargv (argv); | |
68 | return; | |
69 | } | |
70 | } | |
71 | else | |
72 | chp++; | |
73 | len++; | |
74 | } | |
75 | /* Insist on a closing quote. */ | |
76 | if (*chp != '"') | |
77 | { | |
78 | freeargv (argv); | |
79 | return; | |
80 | } | |
81 | /* Insist on trailing white space. */ | |
82 | if (chp[1] != '\0' && !isspace (chp[1])) | |
83 | { | |
84 | freeargv (argv); | |
85 | return; | |
86 | } | |
87 | /* create the buffer. */ | |
88 | arg = xmalloc ((len + 1) * sizeof (char)); | |
89 | /* And copy the characters in. */ | |
90 | chp = start; | |
91 | len = 0; | |
92 | while (*chp != '\0' && *chp != '"') | |
93 | { | |
94 | if (*chp == '\\') | |
95 | { | |
96 | chp++; | |
97 | arg[len] = parse_escape (&chp); | |
98 | } | |
99 | else | |
100 | arg[len] = *chp++; | |
101 | len++; | |
102 | } | |
103 | arg[len] = '\0'; | |
104 | chp++; /* that closing quote. */ | |
105 | break; | |
106 | } | |
107 | default: | |
108 | { | |
109 | /* An unquoted string. Accumulate all non blank | |
110 | characters into a buffer. */ | |
111 | int len; | |
112 | char *start = chp; | |
113 | while (*chp != '\0' && !isspace (*chp)) | |
114 | { | |
115 | chp++; | |
116 | } | |
117 | len = chp - start; | |
118 | arg = xmalloc ((len + 1) * sizeof (char)); | |
119 | strncpy (arg, start, len); | |
120 | arg[len] = '\0'; | |
121 | break; | |
122 | } | |
123 | } | |
124 | /* Append arg to argv. */ | |
125 | argv = xrealloc (argv, (argc + 2) * sizeof (char *)); | |
126 | argv[argc++] = arg; | |
127 | argv[argc] = NULL; | |
128 | } | |
129 | } | |
130 | ||
131 | ||
132 | void | |
133 | mi_parse_free (struct mi_parse *parse) | |
134 | { | |
135 | if (parse == NULL) | |
136 | return; | |
137 | if (parse->command != NULL) | |
b8c9b27d | 138 | xfree (parse->command); |
fb40c209 | 139 | if (parse->token != NULL) |
b8c9b27d | 140 | xfree (parse->token); |
fb40c209 | 141 | if (parse->args != NULL) |
b8c9b27d | 142 | xfree (parse->args); |
fb40c209 AC |
143 | if (parse->argv != NULL) |
144 | freeargv (parse->argv); | |
b8c9b27d | 145 | xfree (parse); |
fb40c209 AC |
146 | } |
147 | ||
148 | ||
149 | struct mi_parse * | |
150 | mi_parse (char *cmd) | |
151 | { | |
152 | char *chp; | |
153 | struct mi_parse *parse = XMALLOC (struct mi_parse); | |
154 | memset (parse, 0, sizeof (*parse)); | |
155 | ||
156 | /* Before starting, skip leading white space. */ | |
157 | while (isspace (*cmd)) | |
158 | cmd++; | |
159 | ||
160 | /* Find/skip any token and then extract it. */ | |
161 | for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++) | |
162 | ; | |
163 | parse->token = xmalloc ((chp - cmd + 1) * sizeof (char *)); | |
164 | memcpy (parse->token, cmd, (chp - cmd)); | |
165 | parse->token[chp - cmd] = '\0'; | |
166 | ||
167 | /* This wasn't a real MI command. Return it as a CLI_COMMAND. */ | |
168 | if (*chp != '-') | |
169 | { | |
170 | while (isspace (*chp)) | |
171 | chp++; | |
172 | parse->command = xstrdup (chp); | |
173 | parse->op = CLI_COMMAND; | |
174 | return parse; | |
175 | } | |
176 | ||
177 | /* Extract the command. */ | |
178 | { | |
179 | char *tmp = chp + 1; /* discard ``-'' */ | |
180 | for (; *chp && !isspace (*chp); chp++) | |
181 | ; | |
182 | parse->command = xmalloc ((chp - tmp + 1) * sizeof (char *)); | |
183 | memcpy (parse->command, tmp, chp - tmp); | |
184 | parse->command[chp - tmp] = '\0'; | |
185 | } | |
186 | ||
187 | /* Find the command in the MI table. */ | |
188 | parse->cmd = mi_lookup (parse->command); | |
189 | if (parse->cmd == NULL) | |
190 | { | |
191 | /* FIXME: This should be a function call. */ | |
192 | fprintf_unfiltered | |
193 | (raw_stdout, | |
194 | "%s^error,msg=\"Undefined MI command: %s\"\n", | |
195 | parse->token, parse->command); | |
196 | mi_parse_free (parse); | |
197 | return NULL; | |
198 | } | |
199 | ||
200 | /* Skip white space following the command. */ | |
201 | while (isspace (*chp)) | |
202 | chp++; | |
203 | ||
204 | /* For new argv commands, attempt to return the parsed argument | |
205 | list. */ | |
206 | if (parse->cmd->argv_func != NULL) | |
207 | { | |
208 | mi_parse_argv (chp, parse); | |
209 | if (parse->argv == NULL) | |
210 | { | |
211 | /* FIXME: This should be a function call. */ | |
212 | fprintf_unfiltered | |
213 | (raw_stdout, | |
214 | "%s^error,msg=\"Problem parsing arguments: %s %s\"\n", | |
215 | parse->token, parse->command, chp); | |
216 | mi_parse_free (parse); | |
217 | return NULL; | |
218 | } | |
219 | } | |
220 | ||
221 | /* FIXME: DELETE THIS */ | |
222 | /* For CLI and old ARGS commands, also return the remainder of the | |
223 | command line as a single string. */ | |
224 | if (parse->cmd->args_func != NULL | |
b2af646b | 225 | || parse->cmd->cli.cmd != NULL) |
fb40c209 AC |
226 | { |
227 | parse->args = xstrdup (chp); | |
228 | } | |
229 | ||
230 | /* Fully parsed. */ | |
231 | parse->op = MI_COMMAND; | |
232 | return parse; | |
233 | } |