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#include <string.h>
#include <X11/Xlib.h>

#include "glvnd/libglxabi.h"

#include "glxglvnd.h"


static Bool __glXGLVNDIsScreenSupported(Display *dpy, int screen)
{
    /* TODO: Think of a better heuristic... */
    return True;
}

static void *__glXGLVNDGetProcAddress(const GLubyte *procName)
{
    return glXGetProcAddressARB(procName);
}

static int FindGLXFunction(const GLubyte *name)
{
    int i;

    for (i = 0; i < DI_FUNCTION_COUNT; i++) {
        if (strcmp((const char *) name, __glXDispatchTableStrings[i]) == 0)
            return i;
    }
    return -1;
}

static void *__glXGLVNDGetDispatchAddress(const GLubyte *procName)
{
    int internalIndex = FindGLXFunction(procName);

    if (internalIndex >= 0) {
        return __glXDispatchFunctions[internalIndex];
    }

    return NULL;
}

static void __glXGLVNDSetDispatchIndex(const GLubyte *procName, int index)
{
    int internalIndex = FindGLXFunction(procName);

    if (internalIndex >= 0)
        __glXDispatchTableIndices[internalIndex] = index;
}

_X_EXPORT Bool __glx_Main(uint32_t version, const __GLXapiExports *exports,
                          __GLXvendorInfo *vendor, __GLXapiImports *imports)
{
    static Bool initDone = False;

    if (GLX_VENDOR_ABI_GET_MAJOR_VERSION(version) !=
        GLX_VENDOR_ABI_MAJOR_VERSION ||
        GLX_VENDOR_ABI_GET_MINOR_VERSION(version) <
        GLX_VENDOR_ABI_MINOR_VERSION)
        return False;

    if (!initDone) {
        initDone = True;
        __glXGLVNDAPIExports = exports;

        imports->isScreenSupported = __glXGLVNDIsScreenSupported;
        imports->getProcAddress = __glXGLVNDGetProcAddress;
        imports->getDispatchAddress = __glXGLVNDGetDispatchAddress;
        imports->setDispatchIndex = __glXGLVNDSetDispatchIndex;
        imports->notifyError = NULL;
        imports->isPatchSupported = NULL;
        imports->initiatePatch = NULL;
    }

    return True;
}