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#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 = {
.cmd = "dummy",
.function = subcmd_null,
.flags = JIM_MODFLAG_HIDDEN,
};
static void add_commands(Jim_Interp *interp, const jim_subcmd_type *ct, const char *sep)
{
const char *s = "";
for (; ct->cmd; ct++) {
if (!(ct->flags & JIM_MODFLAG_HIDDEN)) {
Jim_AppendStrings(interp, Jim_GetResult(interp), s, ct->cmd, 0);
s = sep;
}
}
}
static void bad_subcmd(Jim_Interp *interp, const jim_subcmd_type *command_table, const char *type, int argc, Jim_Obj *const *argv)
{
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), Jim_GetString(argv[0], NULL), ", ", type, " command \"", Jim_GetString(argv[1], NULL), "\": should be ", NULL);
add_commands(interp, command_table, ", ");
}
static void show_cmd_usage(Jim_Interp *interp, const jim_subcmd_type *command_table, int argc, Jim_Obj *const *argv)
{
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "Usage: \"", Jim_GetString(argv[0], NULL), " command ... \", where command is one of: ", NULL);
add_commands(interp, command_table, ", ");
}
static void add_subcmd_usage(Jim_Interp *interp, const jim_subcmd_type *ct, int argc, Jim_Obj *const *argv)
{
Jim_AppendStrings(interp, Jim_GetResult(interp), Jim_GetString(argv[0], NULL), " ", ct->cmd, NULL);
if (ct->args && *ct->args) {
Jim_AppendStrings(interp, Jim_GetResult(interp), " ", ct->args, NULL);
}
}
static void show_full_usage(Jim_Interp *interp, const jim_subcmd_type *ct, int argc, Jim_Obj *const *argv)
{
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
for (; ct->cmd; ct++) {
if (!(ct->flags & JIM_MODFLAG_HIDDEN)) {
add_subcmd_usage(interp, ct, argc, argv);
if (ct->description) {
Jim_AppendStrings(interp, Jim_GetResult(interp), "\n\n ", ct->description, 0);
}
Jim_AppendStrings(interp, Jim_GetResult(interp), "\n\n", 0);
}
}
}
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;
const char *cmdname;
int help = 0;
cmdname = Jim_GetString(argv[0], NULL);
if (argc < 2) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "wrong # args: should be \"", cmdname, " command ...\"\n", 0);
Jim_AppendStrings(interp, Jim_GetResult(interp), "Use \"", cmdname, " -help\" or \"", cmdname, " -help command\" for help", 0);
return 0;
}
cmd = argv[1];
if (argc == 2 && Jim_CompareStringImmediate(interp, cmd, "-usage")) {
/* Show full usage */
show_full_usage(interp, command_table, argc, argv);
return &dummy_subcmd;
}
/* 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 0;
}
help = 1;
/* Skip the 'help' command */
cmd = argv[2];
}
/* Check for special builtin '-commands' command first */
if (Jim_CompareStringImmediate(interp, cmd, "-commands")) {
/* Build the result here */
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
add_commands(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 */
bad_subcmd(interp, command_table, "ambiguous", argc, argv);
return 0;
}
partial = ct;
}
continue;
}
/* If we had an unambiguous partial match */
if (partial && !ct->cmd) {
ct = partial;
}
if (!ct->cmd) {
/* No matching command */
bad_subcmd(interp, command_table, "unknown", argc, argv);
return 0;
}
if (help) {
Jim_SetResultString(interp, "Usage: ", -1);
add_subcmd_usage(interp, ct, argc, argv);
if (ct->description) {
Jim_AppendStrings(interp, Jim_GetResult(interp), "\n\n", ct->description, 0);
}
return 0;
}
/* Check the number of args */
if (argc - 2 < ct->minargs || (ct->maxargs >= 0 && argc - 2> ct->maxargs)) {
Jim_SetResultString(interp, "wrong # args: should be \"", -1);
add_subcmd_usage(interp, ct, argc, argv);
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_SetResultString(interp, "wrong # args: should be \"", -1);
add_subcmd_usage(interp, ct, argc, argv);
Jim_AppendStrings(interp, Jim_GetResult(interp), "\"", NULL);
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);
}
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