Origin for each line in xvfs-core.h from check-in 32b55a907b:

1ecab39ce5 2019-05-02    1: #ifndef XVFS_COMMON_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817
1ecab39ce5 2019-05-02    2: #define XVFS_COMMON_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817 1
1ecab39ce5 2019-05-02    3: 
f74a2e47ab 2019-05-02    4: #include <tcl.h>
f74a2e47ab 2019-05-02    5: 
1ecab39ce5 2019-05-02    6: #define XVFS_PROTOCOL_VERSION 1
f74a2e47ab 2019-05-02    7: 
32b55a907b 2019-05-02    8: typedef const char **(*xvfs_proc_getChildren_t)(const char *path, Tcl_WideInt *count);
32b55a907b 2019-05-02    9: typedef const unsigned char *(*xvfs_proc_getData_t)(const char *path, Tcl_WideInt start, Tcl_WideInt *length);
f74a2e47ab 2019-05-02   10: 
32b55a907b 2019-05-02   11: int Xvfs_Register(Tcl_Interp *interp, const char *fsName, int protocolVersion, xvfs_proc_getChildren_t getChildrenProc, xvfs_proc_getData_t getDataProc);
1ecab39ce5 2019-05-02   12: 
1ecab39ce5 2019-05-02   13: #endif