/* See LICENSE file for copyright and license details. */
#include "libgamma_Site.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <libgamma.h>
/**
* 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)(uintptr_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(JNIEnv *env, jclass class, jint method, jstring site)
{
struct libgamma_site_state *state = malloc(sizeof(*state));
const char *site_chars;
char *site_;
int r;
int saved_errno = 0;
size_t n;
if (site) {
site_chars = (*env)->GetStringUTFChars(env, site, NULL);
n = strlen(site_chars) + 1;
site_ = malloc(n * sizeof(char));
if (!site_)
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)
return fail(env, 0);
r = libgamma_site_initialise(state, method, site_);
if (r)
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(JNIEnv *env, jclass class, jlong address)
{
void *this = (void *)(uintptr_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(JNIEnv *env, jclass class, jlong address)
{
void *this = (void *)(uintptr_t)address;
int r = libgamma_site_restore(this);
if (r)
return r == LIBGAMMA_ERRNO_SET ? errno : r;
return 0;
(void) env;
(void) class;
}
