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167 lines (151 loc) · 4.33 KB
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/* misc. utility functions, mostly callable from R
*
* rJava R/Java interface (C)Copyright 2003-2007 Simon Urbanek
* (see rJava project root for licensing details)
*/
#include "rJava.h"
/** jobjRefInt object : string */
REPE SEXP RgetStringValue(SEXP par) {
SEXP p,e,r;
jstring s;
const char *c;
JNIEnv *env=getJNIEnv();
profStart();
p=CDR(par); e=CAR(p); p=CDR(p);
if (e==R_NilValue) return R_NilValue;
if (TYPEOF(e)==EXTPTRSXP) {
jverify(e);
s = (jstring)EXTPTR_PTR(e);
} else {
error("invalid object parameter");
s = 0;
}
if (!s) return R_NilValue;
c=(*env)->GetStringUTFChars(env, s, 0);
if (!c)
error("cannot retrieve string content");
r = PROTECT(allocVector(STRSXP, 1));
SET_STRING_ELT(r, 0, mkCharUTF8(c));
UNPROTECT(1);
(*env)->ReleaseStringUTFChars(env, s, c);
_prof(profReport("RgetStringValue:"));
return r;
}
/** calls .toString() of the object and returns the corresponding string java object */
HIDE jstring callToString(JNIEnv *env, jobject o) {
jclass cls;
jmethodID mid;
jstring s;
if (!o) { _dbg(rjprintf("callToString: invoked on a NULL object\n")); return 0; }
cls=objectClass(env,o);
if (!cls) {
_dbg(rjprintf("callToString: can't determine class of the object\n"));
releaseObject(env, cls);
checkExceptionsX(env, 1);
return 0;
}
mid=(*env)->GetMethodID(env, cls, "toString", "()Ljava/lang/String;");
if (!mid) {
_dbg(rjprintf("callToString: toString not found for the object\n"));
releaseObject(env, cls);
checkExceptionsX(env, 1);
return 0;
}
BEGIN_RJAVA_CALL;
s = (jstring)(*env)->CallObjectMethod(env, o, mid);
END_RJAVA_CALL;
_mp(MEM_PROF_OUT(" %08x LNEW object method toString result\n", (int) s))
releaseObject(env, cls);
return s;
}
/** calls .toString() on the passed object (int/extptr) and returns the string
value or NULL if there is no toString method */
REPE SEXP RtoString(SEXP par) {
SEXP p,e,r;
jstring s;
jobject o;
const char *c;
JNIEnv *env=getJNIEnv();
p=CDR(par); e=CAR(p); p=CDR(p);
if (e==R_NilValue) return R_NilValue;
if (TYPEOF(e)==EXTPTRSXP) {
jverify(e);
o=(jobject)EXTPTR_PTR(e);
} else
error_return("RtoString: invalid object parameter");
if (!o) return R_NilValue;
s=callToString(env, o);
if (!s) {
return R_NilValue;
}
c=(*env)->GetStringUTFChars(env, s, 0);
PROTECT(r=allocVector(STRSXP,1));
SET_STRING_ELT(r, 0, mkCharUTF8(c));
UNPROTECT(1);
(*env)->ReleaseStringUTFChars(env, s, c);
releaseObject(env, s);
return r;
}
/* compares two references */
REPC SEXP RidenticalRef(SEXP ref1, SEXP ref2) {
SEXP r;
if (TYPEOF(ref1)!=EXTPTRSXP || TYPEOF(ref2)!=EXTPTRSXP) return R_NilValue;
jverify(ref1);
jverify(ref2);
r=allocVector(LGLSXP,1);
LOGICAL(r)[0]=(R_ExternalPtrAddr(ref1)==R_ExternalPtrAddr(ref2));
return r;
}
/** create a NULL external reference */
REPC SEXP RgetNullReference(void) {
return R_MakeExternalPtr(0, R_NilValue, R_NilValue);
}
/** TRUE if cl1 x; cl2 y = (cl2) x ... is valid */
REPC SEXP RisAssignableFrom(SEXP cl1, SEXP cl2) {
SEXP r;
JNIEnv *env=getJNIEnv();
if (TYPEOF(cl1)!=EXTPTRSXP || TYPEOF(cl2)!=EXTPTRSXP)
error("invalid type");
if (!env)
error("VM not initialized");
jverify(cl1);
jverify(cl2);
r=allocVector(LGLSXP,1);
LOGICAL(r)[0]=((*env)->IsAssignableFrom(env,
(jclass)EXTPTR_PTR(cl1),
(jclass)EXTPTR_PTR(cl2)));
return r;
}
REPC SEXP RJava_checkJVM(void) {
SEXP r = allocVector(LGLSXP, 1);
LOGICAL(r)[0] = 0;
if (!jvm || !getJNIEnv()) return r;
LOGICAL(r)[0] = 1;
return r;
}
extern int rJava_initialized; /* in callJNI.c */
REPC SEXP RJava_needs_init(void) {
SEXP r = allocVector(LGLSXP, 1);
LOGICAL(r)[0] = rJava_initialized?0:1;
return r;
}
REPC SEXP RJava_set_memprof(SEXP fn) {
#ifdef MEMPROF
const char *cFn = CHAR(STRING_ELT(fn, 0));
int env = 0; /* we're just faking it so we can call MEM_PROF_OUT */
if (memprof_f) fclose(memprof_f);
if (cFn && !cFn[0]) {
memprof_f = 0; return R_NilValue;
}
if (!cFn || (cFn[0]=='-' && !cFn[1]))
memprof_f = stdout;
else
memprof_f = fopen(cFn, "a");
if (!memprof_f) error("Cannot create memory profile file.");
MEM_PROF_OUT(" 00000000 REST -- profiling file set --\n");
return R_NilValue;
#else
error("Memory profiling support was not enabled in rJava.");
#endif
return R_NilValue;
}