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#include <assert.h>
#include "jim.h"
#include "jimautoconf.h"
#include "jim-subcmd.h"
static void JimInterpDelProc(Jim_Interp *interp, void *privData)
{
Jim_FreeInterp((Jim_Interp *)privData);
}
/* Everything passing between interpreters must be converted to a string */
static Jim_Obj *JimInterpCopyObj(Jim_Interp *target, Jim_Obj *obj)
{
const char *rep;
int len;
rep = Jim_GetString(obj, &len);
return Jim_NewStringObj(target, rep, len);
}
#define JimInterpCopyResult(to, from) Jim_SetResult((to), JimInterpCopyObj((to), Jim_GetResult((from))))
static int interp_cmd_eval(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
int ret;
Jim_Interp *child = Jim_CmdPrivData(interp);
Jim_Obj *scriptObj;
Jim_Obj *targetScriptObj;
scriptObj = Jim_ConcatObj(interp, argc, argv);
targetScriptObj = JimInterpCopyObj(child, scriptObj);
Jim_FreeNewObj(interp, scriptObj);
Jim_IncrRefCount(targetScriptObj);
ret = Jim_EvalObj(child, targetScriptObj);
Jim_DecrRefCount(child, targetScriptObj);
JimInterpCopyResult(interp, child);
return ret;
}
static int interp_cmd_delete(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return Jim_DeleteCommand(interp, Jim_String(argv[0]));
}
static void JimInterpDelAlias(Jim_Interp *interp, void *privData)
{
Jim_Interp *parent = Jim_GetAssocData(interp, "interp.parent");
Jim_DecrRefCount(parent, (Jim_Obj *)privData);
}
static int JimInterpAliasProc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
int i, ret;
Jim_Interp *parent = Jim_GetAssocData(interp, "interp.parent");
Jim_Obj *targetPrefixObj = Jim_CmdPrivData(interp);
Jim_Obj *targetScriptObj;
assert(parent);
/* Build the complete command */
targetScriptObj = Jim_DuplicateObj(parent, targetPrefixObj);
for (i = 1; i < argc; i++) {
Jim_ListAppendElement(parent, targetScriptObj,
JimInterpCopyObj(parent, argv[i]));
}
Jim_IncrRefCount(targetScriptObj);
ret = Jim_EvalObj(parent, targetScriptObj);
Jim_DecrRefCount(parent, targetScriptObj);
JimInterpCopyResult(interp, parent);
return ret;
}
static int interp_cmd_alias(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_Interp *child = Jim_CmdPrivData(interp);
Jim_Obj *aliasPrefixList;
/* The prefix list will be held inside the child, but it still belongs
* to the parent!
*/
aliasPrefixList = Jim_NewListObj(interp, argv + 1, argc - 1);
Jim_IncrRefCount(aliasPrefixList);
Jim_CreateCommand(child, Jim_String(argv[0]), JimInterpAliasProc, aliasPrefixList, JimInterpDelAlias);
return JIM_OK;
}
static const jim_subcmd_type interp_command_table[] = {
{ "eval",
"script ...",
interp_cmd_eval,
1,
-1,
/* Description: Concat the args and evaluate the script in the interpreter */
},
{ "delete",
NULL,
interp_cmd_delete,
0,
0,
JIM_MODFLAG_FULLARGV,
/* Description: Delete this interpreter */
},
{ "alias",
"childcmd parentcmd ?arg ...?",
interp_cmd_alias,
2,
-1,
/* Description: Create an alias which refers to a script in the parent interpreter */
},
{ NULL }
};
static int JimInterpSubCmdProc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return Jim_CallSubCmd(interp, Jim_ParseSubCmd(interp, interp_command_table, argc, argv), argc, argv);
}
static void JimInterpCopyVariable(Jim_Interp *target, Jim_Interp *source, const char *var, const char *default_value)
{
Jim_Obj *value = Jim_GetGlobalVariableStr(source, var, JIM_NONE);
const char *str;
str = value ? Jim_String(value) : default_value;
if (str) {
Jim_SetGlobalVariableStr(target, var, Jim_NewStringObj(target, str, -1));
}
}
/**
* [interp] creates a new interpreter.
*/
static int JimInterpCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_Interp *child;
char buf[34];
if (argc != 1) {
Jim_WrongNumArgs(interp, 1, argv, "");
return JIM_ERR;
}
/* Create the interpreter command */
child = Jim_CreateInterp();
Jim_RegisterCoreCommands(child);
Jim_InitStaticExtensions(child);
/* Copy some core variables to the new interpreter */
JimInterpCopyVariable(child, interp, "argv", NULL);
JimInterpCopyVariable(child, interp, "argc", NULL);
JimInterpCopyVariable(child, interp, "argv0", NULL);
JimInterpCopyVariable(child, interp, "jim::argv0", NULL);
JimInterpCopyVariable(child, interp, "jim::exe", NULL);
/* Allow the child interpreter to find the parent */
Jim_SetAssocData(child, "interp.parent", NULL, interp);
snprintf(buf, sizeof(buf), "interp.handle%ld", Jim_GetId(interp));
Jim_CreateCommand(interp, buf, JimInterpSubCmdProc, child, JimInterpDelProc);
Jim_SetResult(interp, Jim_MakeGlobalNamespaceName(interp, Jim_NewStringObj(interp, buf, -1)));
return JIM_OK;
}
int Jim_interpInit(Jim_Interp *interp)
{
if (Jim_PackageProvide(interp, "interp", "1.0", JIM_ERRMSG))
return JIM_ERR;
Jim_CreateCommand(interp, "interp", JimInterpCommand, NULL, NULL);
return JIM_OK;
}
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