-
Notifications
You must be signed in to change notification settings - Fork 120
/
jim-subcmd.c
253 lines (221 loc) · 7.47 KB
/
jim-subcmd.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
/*
* Makes it easy to support "ensembles". i.e. commands with subcommands
* like [string] and [array]
*
* (c) 2008 Steve Bennett <steveb@workware.net.au>
*
*/
#include <stdio.h>
#include <string.h>
#include <jim-subcmd.h>
/**
* Implements the common 'commands' subcommand
*/
static int subcmd_null(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
/* Nothing to do, since the result has already been created */
return JIM_OK;
}
/**
* Do-nothing command to support -commands and -usage
*/
static const jim_subcmd_type dummy_subcmd = {
"dummy", NULL, subcmd_null, 0, 0, JIM_MODFLAG_HIDDEN
};
/* Creates and returns a string (object) of each non-hidden command in 'ct',
* sorted and separated with the given separator string.
*
* For example, if there are two commands, "def" and "abc", with a separator of "; ",
* the returned string will be "abc; def"
*
* The returned object has a reference count of 0.
*/
static Jim_Obj *subcmd_cmd_list(Jim_Interp *interp, const jim_subcmd_type * ct, const char *sep)
{
/* Create a list to sort before joining */
Jim_Obj *listObj = Jim_NewListObj(interp, NULL, 0);
Jim_Obj *sortCmd[2];
for (; ct->cmd; ct++) {
if (!(ct->flags & JIM_MODFLAG_HIDDEN)) {
Jim_ListAppendElement(interp, listObj, Jim_NewStringObj(interp, ct->cmd, -1));
}
}
/* There is no direct API to sort a list, so just invoke lsort here. */
sortCmd[0] = Jim_NewStringObj(interp, "lsort", -1);
sortCmd[1] = listObj;
/* Leaves the result in the interpreter result */
if (Jim_EvalObjVector(interp, 2, sortCmd) == JIM_OK) {
return Jim_ListJoin(interp, Jim_GetResult(interp), sep, strlen(sep));
}
/* lsort can't really fail (normally), but if it does, just return the error as the result */
return Jim_GetResult(interp);
}
static void bad_subcmd(Jim_Interp *interp, const jim_subcmd_type * command_table, const char *type,
Jim_Obj *cmd, Jim_Obj *subcmd)
{
Jim_SetResultFormatted(interp, "%#s, %s command \"%#s\": should be %#s", cmd, type,
subcmd, subcmd_cmd_list(interp, command_table, ", "));
}
static void show_cmd_usage(Jim_Interp *interp, const jim_subcmd_type * command_table, int argc,
Jim_Obj *const *argv)
{
Jim_SetResultFormatted(interp, "Usage: \"%#s command ... \", where command is one of: %#s",
argv[0], subcmd_cmd_list(interp, command_table, ", "));
}
static void add_cmd_usage(Jim_Interp *interp, const jim_subcmd_type * ct, Jim_Obj *cmd)
{
if (cmd) {
Jim_AppendStrings(interp, Jim_GetResult(interp), Jim_String(cmd), " ", NULL);
}
Jim_AppendStrings(interp, Jim_GetResult(interp), ct->cmd, NULL);
if (ct->args && *ct->args) {
Jim_AppendStrings(interp, Jim_GetResult(interp), " ", ct->args, NULL);
}
}
void Jim_SubCmdArgError(Jim_Interp *interp, const jim_subcmd_type * ct, Jim_Obj *subcmd)
{
Jim_SetResultString(interp, "wrong # args: should be \"", -1);
add_cmd_usage(interp, ct, subcmd);
Jim_AppendStrings(interp, Jim_GetResult(interp), "\"", NULL);
}
/* internal rep is stored in ptrIntvalue
* ptr = command_table
* int1 = index
*/
static const Jim_ObjType subcmdLookupObjType = {
"subcmd-lookup",
NULL,
NULL,
NULL,
JIM_TYPE_REFERENCES
};
const jim_subcmd_type *Jim_ParseSubCmd(Jim_Interp *interp, const jim_subcmd_type * command_table,
int argc, Jim_Obj *const *argv)
{
const jim_subcmd_type *ct;
const jim_subcmd_type *partial = 0;
int cmdlen;
Jim_Obj *cmd;
const char *cmdstr;
int help = 0;
int argsok = 1;
if (argc < 2) {
Jim_SetResultFormatted(interp, "wrong # args: should be \"%#s command ...\"\n"
"Use \"%#s -help ?command?\" for help", argv[0], argv[0]);
return 0;
}
cmd = argv[1];
/* Use cached lookup if possible */
if (cmd->typePtr == &subcmdLookupObjType) {
if (cmd->internalRep.ptrIntValue.ptr == command_table) {
ct = command_table + cmd->internalRep.ptrIntValue.int1;
goto found;
}
}
/* Check for the help command */
if (Jim_CompareStringImmediate(interp, cmd, "-help")) {
if (argc == 2) {
/* Usage for the command, not the subcommand */
show_cmd_usage(interp, command_table, argc, argv);
return &dummy_subcmd;
}
help = 1;
/* Skip the 'help' command */
cmd = argv[2];
}
/* Check for special builtin '-commands' command first */
if (Jim_CompareStringImmediate(interp, cmd, "-commands")) {
Jim_SetResult(interp, subcmd_cmd_list(interp, command_table, " "));
return &dummy_subcmd;
}
cmdstr = Jim_GetString(cmd, &cmdlen);
for (ct = command_table; ct->cmd; ct++) {
if (Jim_CompareStringImmediate(interp, cmd, ct->cmd)) {
/* Found an exact match */
break;
}
if (strncmp(cmdstr, ct->cmd, cmdlen) == 0) {
if (partial) {
/* Ambiguous */
if (help) {
/* Just show the top level help here */
show_cmd_usage(interp, command_table, argc, argv);
return &dummy_subcmd;
}
bad_subcmd(interp, command_table, "ambiguous", argv[0], argv[1 + help]);
return 0;
}
partial = ct;
}
continue;
}
/* If we had an unambiguous partial match */
if (partial && !ct->cmd) {
ct = partial;
}
if (!ct->cmd) {
/* No matching command */
if (help) {
/* Just show the top level help here */
show_cmd_usage(interp, command_table, argc, argv);
return &dummy_subcmd;
}
bad_subcmd(interp, command_table, "unknown", argv[0], argv[1 + help]);
return 0;
}
if (help) {
Jim_SetResultString(interp, "Usage: ", -1);
/* subcmd */
add_cmd_usage(interp, ct, argv[0]);
return &dummy_subcmd;
}
/* Cache the result for a successful non-help lookup */
Jim_FreeIntRep(interp, cmd);
cmd->typePtr = &subcmdLookupObjType;
cmd->internalRep.ptrIntValue.ptr = (void *)command_table;
cmd->internalRep.ptrIntValue.int1 = ct - command_table;
found:
/* Check the number of args */
if (argc - 2 < ct->minargs) {
argsok = 0;
}
else if (ct->maxargs >= 0 && argc - 2 > ct->maxargs) {
argsok = 0;
}
else if (ct->maxargs < -1 && (argc - 2) % -ct->maxargs != 0) {
/* -2 means must have n * 2 args */
argsok = 0;
}
if (!argsok) {
Jim_SetResultString(interp, "wrong # args: should be \"", -1);
/* subcmd */
add_cmd_usage(interp, ct, argv[0]);
Jim_AppendStrings(interp, Jim_GetResult(interp), "\"", NULL);
return 0;
}
/* Good command */
return ct;
}
int Jim_CallSubCmd(Jim_Interp *interp, const jim_subcmd_type * ct, int argc, Jim_Obj *const *argv)
{
int ret = JIM_ERR;
if (ct) {
if (ct->flags & JIM_MODFLAG_FULLARGV) {
ret = ct->function(interp, argc, argv);
}
else {
ret = ct->function(interp, argc - 2, argv + 2);
}
if (ret < 0) {
Jim_SubCmdArgError(interp, ct, argv[0]);
ret = JIM_ERR;
}
}
return ret;
}
int Jim_SubCmdProc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const jim_subcmd_type *ct =
Jim_ParseSubCmd(interp, (const jim_subcmd_type *)Jim_CmdPrivData(interp), argc, argv);
return Jim_CallSubCmd(interp, ct, argc, argv);
}