how to search in multiple directories with specified extensions

[xinglonghe]

windows findstr can do this like:
findstr /PRISN /D:root\dir1;root\dir2 /C:foo *.c *.h

which search in two directories "root\dir1" and "root\dir2", and only search the files with extension ".c" and ".h".

I know that ripgrep can do this with:
rg foo -g root/dir1/.c -g root/dir1/.h -g root/dir2/.c -g root/dir2/.h

the command looks too tedious, especially if we want to specify too many directories and extensions.

Is there a simpler syntax for ripgrep doing this?

[BurntSushi]

rg root/dir1 root/dir2 -tc foo

[xinglonghe]

I see, thanks. so just use "-g" for specific extensions:
rg foo root/dir1 root/dir2 -g '*.{c,h}'

[BurntSushi]

Sure, that works too.