X-Git-Url: http://andersk.mit.edu/gitweb/moira.git/blobdiff_plain/7674bbe4e4021d3214cd6ac45c807123547d5d66..bde1652c9c4187fb2f212baf2f35696e81d0c08a:/webmoira/moirai.c

diff --git a/webmoira/moirai.c b/webmoira/moirai.c
new file mode 100644
index 00000000..31c0c3e5
--- /dev/null
+++ b/webmoira/moirai.c
@@ -0,0 +1,298 @@
+#include "mit_moira_MoiraConnectInternal.h"
+#include <moira.h>
+#include <mr_et.h>
+#include <malloc.h>
+#include <string.h>
+#include <stdio.h>
+
+static void throwMoiraException(JNIEnv *env, int code)
+{
+    char buffer[1024];
+    jmethodID mid;
+    jobject tothrow;
+    jclass IOE;
+    jstring jmess;
+
+    IOE = (*env)->FindClass(env, "mit/moira/MoiraException");
+    if (IOE == NULL) {
+	fprintf(stderr, "moirai: No Class\n");
+	goto die;
+    }
+    mid = (*env)->GetMethodID(env, IOE, "<init>", "(Ljava/lang/String;I)V");
+    if (mid == NULL) {
+	fprintf(stderr, "moirai: No Method\n");
+	goto die;
+    }
+    sprintf(buffer, "%s", error_message(code));
+    jmess = (*env)->NewStringUTF(env, buffer);
+    if (jmess == NULL) {
+	fprintf(stderr, "Cannot get new string\n");
+	goto die;
+    }
+    tothrow = (*env)->NewObject(env, IOE, mid, jmess, (jint) code);
+    if (tothrow == NULL) {
+	fprintf(stderr, "moirai: No Throw\n");
+	goto die;
+    }
+    (*env)->Throw(env, (jthrowable) tothrow);
+    return;
+ die:
+    abort();
+    return;
+}
+
+static void throwMoiraExceptionMess(JNIEnv *env, char *mess)
+{
+    jclass IOE = (*env)->FindClass(env, "mit/moira/MoiraException");
+    if (IOE == NULL) abort();
+    (*env)->ThrowNew(env, IOE, mess);
+    return;
+}
+
+JNIEXPORT void JNICALL Java_mit_moira_MoiraConnectInternal_connect(JNIEnv *env,
+							 jclass Class, jstring server) {
+    int status;
+    char buffer[1024];
+    const char *aserver = (*env)->GetStringUTFChars(env, server, 0);
+    if (strlen(aserver) > sizeof(buffer)) abort();
+    strcpy(buffer, aserver);
+    (*env)->ReleaseStringUTFChars(env, server, aserver);
+    status = mr_connect(buffer);
+    if (status != MR_SUCCESS) throwMoiraException(env, status);
+    status = mr_version(2);
+    if (status != MR_SUCCESS) {
+	if (status == MR_VERSION_LOW) return; /* This is OK */
+	else {
+	    mr_disconnect();
+	    throwMoiraException(env, status);
+	}
+    }
+    return;
+}
+
+JNIEXPORT void JNICALL Java_mit_moira_MoiraConnectInternal_proxy(JNIEnv *env,
+						       jclass Class,
+						       jstring jUser) {
+    int status;
+    char buffer[1024];
+    const char *user = (*env)->GetStringUTFChars(env, jUser, 0);
+    if (strlen(user) > sizeof(buffer)) abort();
+    strcpy(buffer, user);
+    (*env)->ReleaseStringUTFChars(env, jUser, user);
+    status = mr_proxy(buffer, "Java");
+    if (status != MR_SUCCESS) throwMoiraException(env, status);
+    return;
+}
+
+
+JNIEXPORT void JNICALL Java_mit_moira_MoiraConnectInternal_auth(JNIEnv *env,
+						      jclass Class) {
+    int status;
+    status = mr_auth("JavaInterface");
+    if (status != MR_SUCCESS) throwMoiraException(env, status);
+    return;
+}
+
+JNIEXPORT void JNICALL Java_mit_moira_MoiraConnectInternal_disconnect
+    (JNIEnv *env, jclass Class) {
+    mr_disconnect();
+    return;
+}
+	
+typedef struct ArgBlock {
+    int alloccount;
+    int count;
+    char **stringval;
+} ArgBlock;
+
+typedef struct ListBlock {
+    int alloccount;
+    int count;
+    ArgBlock **Args;
+} ListBlock;
+
+static jobjectArray ArgBlockToJavaArray(JNIEnv *env, ArgBlock *argb);
+static jobjectArray ListBlockToJavaArray(JNIEnv *env, ListBlock *lb);
+
+extern int mr_query(char *name, int argc, char **argv,
+		int (*proc)(int, char **, void *), void *hint);
+static ListBlock *NewListBlock();
+static ArgBlock *NewArgBlock();
+static void FreeListBlock(ListBlock *);
+static int StashResults(int argc, char **argv, void *callback);
+static char **ConvertJavaArgs(JNIEnv *env, jobjectArray jargs);
+static void FreeArgs(char **args);
+
+JNIEXPORT jobjectArray JNICALL Java_mit_moira_MoiraConnectInternal_mr_1query
+    (JNIEnv *env, jclass Class, jstring jcommand, jobjectArray jargs) {
+    ListBlock *listblock = NewListBlock();
+    jobjectArray retval;
+    int status;
+    const char *command;
+    char icommand[1024];
+    char **args = ConvertJavaArgs(env, jargs);
+    if (args == NULL) return (NULL); /* It probably thru an exception */
+    command = (*env)->GetStringUTFChars(env, jcommand, 0);
+    strncpy(icommand, command, sizeof(icommand));
+
+    status = mr_query(icommand, (*env)->GetArrayLength(env, jargs), args, 
+			 StashResults, listblock);
+    FreeArgs(args);			/* Don't need them anymore */
+    if (status != MR_SUCCESS) {
+	FreeListBlock(listblock);
+	throwMoiraException(env, status);
+	return (0);
+    }
+    /*    if (listblock->count == 0) { / * No such list or empty list * /
+	FreeListBlock(listblock);
+	throwMoiraExceptionMess(env, "No Such List or Empty List");
+	return(0);
+    } */
+
+    if (listblock->count == 0) return (0);
+
+    retval = ListBlockToJavaArray(env, listblock);
+    FreeListBlock(listblock);
+    return (retval);
+
+}
+
+static ArgBlock *NewArgBlock() {
+    ArgBlock *argb = (ArgBlock *)malloc(sizeof(ArgBlock));
+    argb->alloccount = 10;
+    argb->stringval = (char **) malloc(10 * sizeof(char *));
+    argb->count = 0;
+    return (argb);
+}
+
+static void AddArg(ArgBlock *argb, char *arg) {
+    int i;
+    if (argb->alloccount <= (argb->count + 1)) {
+	char **st = malloc((2 * argb->alloccount) * sizeof(char *));
+	argb->alloccount *= 2;
+	for (i = 0; i < argb->count; i++)
+	    st[i] = argb->stringval[i];
+	free(argb->stringval);
+	argb->stringval = st;
+    }
+    argb->stringval[argb->count++] = arg;
+}
+
+static ListBlock *NewListBlock() {
+    ListBlock *list = (ListBlock *)malloc(sizeof(ListBlock));
+    list->alloccount = 10;
+    list->Args = (ArgBlock **) malloc(10 * sizeof(ArgBlock *));
+    list->count = 0;
+    return (list);
+}
+
+static void FreeArgBlock(ArgBlock *argb) {
+    int i;
+    for (i = 0; i < argb->count; i++) free(argb->stringval[i]);
+    free(argb->stringval);
+    free(argb);
+}
+
+static void FreeListBlock(ListBlock *list) {
+    int i;
+    for (i = 0; i < list->count; i++) FreeArgBlock(list->Args[i]);
+    free(list->Args);
+    free(list);
+}
+
+static jobjectArray ArgBlockToJavaArray(JNIEnv *env, ArgBlock *argb) {
+    jobjectArray retval;
+    int i;
+    retval = (*env)->NewObjectArray(env, argb->count,
+				    (*env)->FindClass(env, "java/lang/String"),
+				    NULL);
+    for (i = 0; i < argb->count; i++) {
+	(*env)->SetObjectArrayElement(env, retval, i,
+				      (*env)->NewStringUTF(env, argb->stringval[i]));
+    }
+    return (retval);
+}
+
+static jobjectArray ListBlockToJavaArray(JNIEnv *env, ListBlock *lb) {
+    jobjectArray retval;
+    int i;
+    retval = (*env)->NewObjectArray(env, lb->count,
+				    (*env)->FindClass(env, "java/lang/Object"),
+				    NULL);
+    for (i = 0; i < lb->count; i++)
+	(*env)->SetObjectArrayElement(env, retval, i,
+				      ArgBlockToJavaArray(env, lb->Args[i]));
+    return (retval);
+}
+
+static int StashResults(int argc, char **argv, void *callback) {
+    ListBlock *list = (ListBlock *) callback;
+    ArgBlock *argb;
+    char *arg;
+    int i;
+
+    /* printf("DEBUG: StashResults argc = %d\n", argc);
+     * for (i = 0; i < argc; i++)
+     * printf("DEBUG: StashResults argv[%d] = %s\n", i, argv[i]);
+     */
+
+    while (list->alloccount <= (list->count + 1)) {
+	ArgBlock **args = (ArgBlock **) malloc(list->alloccount * 2 * sizeof(char *));
+	list->alloccount = list->alloccount * 2;
+	for(i = 0; i < list->count; i++) {
+	    args[i] = list->Args[i];
+	}
+	free(list->Args);
+	list->Args = args;
+    }
+
+    argb = NewArgBlock();
+
+    for (i = 0; i < argc; i++) {
+	arg = (char *) malloc(strlen(argv[i]) + 1);
+	strcpy(arg, argv[i]);
+	AddArg(argb, arg);
+    }
+    list->Args[list->count++] = argb;
+    return (0);
+}
+
+static char **ConvertJavaArgs(JNIEnv *env, jobjectArray jargs) {
+    char **retval;
+    int i, j;
+    const char *iarg;
+    int length = (*env)->GetArrayLength(env, jargs);
+    if (length == 0) {		/* Does this happen in a non-error situation? */
+	retval = (char **) malloc(sizeof (char *));
+	retval[0] = NULL;
+	return(retval);
+    }
+    retval = (char **) malloc((length + 1) * sizeof(char *));
+    for (i = 0; i < length; i++) {
+	jobject jarg = (*env)->GetObjectArrayElement(env, jargs, i);
+	if ((*env)->ExceptionOccurred(env)) {
+	    for (j = 0; j < i; j++) free(retval[j]);
+	    free (retval);
+	    return (NULL);
+	}
+	iarg = (*env)->GetStringUTFChars(env, jarg, 0);
+	if ((*env)->ExceptionOccurred(env)) {
+	    for (j = 0; j < i; j++) free(retval[j]);
+	    free (retval);
+	    return (NULL);
+	}
+	retval[i] = malloc(strlen(iarg) + 1);
+	strcpy(retval[i], iarg);
+	(*env)->ReleaseStringUTFChars(env, jarg, iarg);
+    }
+    retval[length] = NULL;
+    return (retval);
+}
+
+static void FreeArgs(char **args) {
+    int i;
+    i = 0;
+    while (args[i] != NULL) free(args[i++]);
+    free(args);
+}
+