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check whether malloc returns a valid pointer

This commit is contained in:
Dan Lynch 2006-06-27 13:32:15 +00:00
parent 9ca2f64ee1
commit 916f21921f
1 changed files with 9 additions and 4 deletions
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13
src/hci/mucurses/windows.c
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@ -51,10 +51,11 @@ WINDOW *derwin ( WINDOW *parent, int nlines, int ncols,
WINDOW *child;
if ( parent == NULL )
return NULL;
if ( ( child = malloc( sizeof( WINDOW ) ) ) == NULL )
return NULL;
if ( ( (unsigned)ncols > parent->width ) ||
( (unsigned)nlines > parent->height ) )
return NULL;
child = malloc( sizeof( WINDOW ) );
child->ori_y = parent->ori_y + begin_y;
child->ori_x = parent->ori_x + begin_x;
child->height = nlines;
@ -74,7 +75,8 @@ WINDOW *dupwin ( WINDOW *orig ) {
WINDOW *copy;
if ( orig == NULL )
return NULL;
copy = malloc( sizeof( WINDOW ) );
if ( ( copy = malloc( sizeof( WINDOW ) ) ) == NULL )
return NULL;
copy->scr = orig->scr;
copy->attrs = orig->attrs;
copy->ori_y = orig->ori_y;
@ -117,7 +119,9 @@ int mvwin ( WINDOW *win, int y, int x ) {
* @ret *win return pointer to new window
*/
WINDOW *newwin ( int nlines, int ncols, int begin_y, int begin_x ) {
WINDOW *win = malloc( sizeof(WINDOW) );
WINDOW *win;
if ( ( win = malloc( sizeof(WINDOW) ) ) == NULL )
return NULL;
if ( ( (unsigned)( begin_y + nlines ) > stdscr->height ) &&
( (unsigned)( begin_x + ncols ) > stdscr->width ) )
return NULL;
@ -145,7 +149,8 @@ WINDOW *subwin ( WINDOW *parent, int nlines, int ncols,
WINDOW *child;
if ( parent == NULL )
return NULL;
child = malloc( sizeof( WINDOW ) );
if ( ( child = malloc( sizeof( WINDOW ) ) ) == NULL )
return NULL;
child = newwin( nlines, ncols, begin_y, begin_x );
child->parent = parent;
child->scr = parent->scr;