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/**
* jlibgamma -- Display server abstraction layer for gamma ramp and Java
* Copyright (C) 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "libgamma_Site.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libgamma.h>
#define J JNIEnv* env, jclass class
/**
* Make a failure-return.
*
* @param error_code The error code returned from the failing function or zero to read `errno`.
* @return The object to return.
*/
static jlongArray fail(JNIEnv* env, int error_code)
{
jlongArray rc = (*env)->NewLongArray(env, 3);
jlong e, z = 0;
if ((error_code == LIBGAMMA_ERRNO_SET) || !error_code)
error_code = errno;
e = (jlong)error_code;
(*env)->SetLongArrayRegion(env, rc, 0, 1, &z);
(*env)->SetLongArrayRegion(env, rc, 1, 1, &z);
(*env)->SetLongArrayRegion(env, rc, 2, 1, &e);
return rc;
}
/**
* Make a success-return.
*
* @param state The native object.
* @param count The subelement count.
* @return The object to return.
*/
static jlongArray ok(JNIEnv* env, void* state, size_t count)
{
jlong a = (jlong)(size_t)state;
jlong b = (jlong)count, z = 0;
jlongArray rc = (*env)->NewLongArray(env, 3);
(*env)->SetLongArrayRegion(env, rc, 0, 1, &a);
(*env)->SetLongArrayRegion(env, rc, 1, 1, &b);
(*env)->SetLongArrayRegion(env, rc, 2, 1, &z);
return rc;
}
/**
* Create a site state.
*
* @param method The adjustment method (display server and protocol.)
* @param site The site identifier.
* @return Element 0: The value for {@link #address}.
* Element 1: The value for {@link #partitions_available}
* Element 2: Error code, zero on success.
*/
jlongArray Java_libgamma_Site_libgamma_1site_1create(J, jint method, jstring site)
{
libgamma_site_state_t* state = malloc(sizeof(libgamma_site_state_t));
const char* site_chars;
char* site_;
int r;
if (site != NULL)
{
int saved_errno = 0;
size_t n;
site_chars = (*env)->GetStringUTFChars(env, site, NULL);
n = strlen(site_chars) + 1;
site_ = malloc(n * sizeof(char));
if (site_ == NULL)
saved_errno = errno;
else
memcpy(site_, site_chars, n * sizeof(char));
(*env)->ReleaseStringUTFChars(env, site, site_chars);
if (saved_errno)
return fail(env, errno);
}
else
site_ = NULL;
if (state == NULL)
return fail(env, 0);
r = libgamma_site_initialise(state, method, site_);
if (r != 0)
return fail(env, r);
return ok(env, state, state->partitions_available);
(void) class;
}
/**
* Release all resources held by a site state
* and free the site state pointer.
*
* @param address The site state.
*/
void Java_libgamma_Site_libgamma_1site_1free(J, jlong address)
{
void* this = (void*)(size_t)address;
libgamma_site_free(this);
(void) env;
(void) class;
}
/**
* Restore the gamma ramps all CRTC:s within a site to the system settings.
*
* @param address The site state.
* @return Zero on success, and error code on failure.
*/
jint Java_libgamma_Site_libgamma_1site_1restore(J, jlong address)
{
void* this = (void*)(size_t)address;
int r = libgamma_site_restore(this);
if (r != 0)
return r == LIBGAMMA_ERRNO_SET ? errno : r;
return 0;
(void) env;
(void) class;
}
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