xrdp/xrdp/funcs.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * simple functions
 */

#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif

#include "xrdp.h"
#include "string_calls.h"

/*****************************************************************************/
/* returns boolean */
int
rect_contains_pt(struct xrdp_rect *in, int x, int y)
{
    if (x < in->left)
    {
        return 0;
    }

    if (y < in->top)
    {
        return 0;
    }

    if (x >= in->right)
    {
        return 0;
    }

    if (y >= in->bottom)
    {
        return 0;
    }

    return 1;
}

/*****************************************************************************/
int
rect_intersect(struct xrdp_rect *in1, struct xrdp_rect *in2,
               struct xrdp_rect *out)
{
    int rv;
    struct xrdp_rect dumby;

    if (out == 0)
    {
        out = &dumby;
    }

    *out = *in1;

    if (in2->left > in1->left)
    {
        out->left = in2->left;
    }

    if (in2->top > in1->top)
    {
        out->top = in2->top;
    }

    if (in2->right < in1->right)
    {
        out->right = in2->right;
    }

    if (in2->bottom < in1->bottom)
    {
        out->bottom = in2->bottom;
    }

    rv = !ISRECTEMPTY(*out);

    if (!rv)
    {
        g_memset(out, 0, sizeof(struct xrdp_rect));
    }

    return rv;
}

/*****************************************************************************/
/* returns boolean */
int
rect_contained_by(struct xrdp_rect *in1, int left, int top,
                  int right, int bottom)
{
    if (left < in1->left || top < in1->top ||
            right > in1->right || bottom > in1->bottom)
    {
        return 0;
    }
    else
    {
        return 1;
    }
}

/*****************************************************************************/
/* adjust the bounds to fit in the bitmap */
/* return false if there is nothing to draw else return true */
int
check_bounds(struct xrdp_bitmap *b, int *x, int *y, int *cx, int *cy)
{
    if (*x >= b->width)
    {
        return 0;
    }

    if (*y >= b->height)
    {
        return 0;
    }

    if (*x < 0)
    {
        *cx += *x;
        *x = 0;
    }

    if (*y < 0)
    {
        *cy += *y;
        *y = 0;
    }

    if (*cx <= 0)
    {
        return 0;
    }

    if (*cy <= 0)
    {
        return 0;
    }

    if (*x + *cx > b->width)
    {
        *cx = b->width - *x;
    }

    if (*y + *cy > b->height)
    {
        *cy = b->height - *y;
    }

    return 1;
}

/*****************************************************************************/
int
set_string(char **in_str, const char *in)
{
    if (in_str == 0)
    {
        return 0;
    }

    g_free(*in_str);
    *in_str = g_strdup(in);
    return 0;
}