libnjb
2.2.7
|
Functions | |
u_int64_t | njb1_bytes_to_64bit (unsigned char *dp) |
void | from_64bit_to_njb1_bytes (u_int64_t val, unsigned char *dp) |
u_int32_t | njb1_bytes_to_32bit (unsigned char *dp) |
u_int32_t | njb3_bytes_to_32bit (unsigned char *dp) |
void | from_32bit_to_njb1_bytes (u_int32_t val, unsigned char *dp) |
void | from_32bit_to_njb3_bytes (u_int32_t val, unsigned char *dp) |
u_int16_t | njb1_bytes_to_16bit (unsigned char *dp) |
u_int16_t | njb3_bytes_to_16bit (unsigned char *dp) |
void | from_16bit_to_njb1_bytes (u_int16_t val, unsigned char *dp) |
void | from_16bit_to_njb3_bytes (u_int16_t val, unsigned char *dp) |
u_int16_t | get_msw (u_int32_t word) |
u_int16_t | get_lsw (u_int32_t word) |
u_int64_t | make64 (u_int32_t msdw, u_int32_t lsdw) |
void | split64 (u_int64_t num, u_int32_t *msdw, u_int32_t *lsdw) |
We want libnjb to be "endianness agnostic" i.e. the byte-ordering of the libnjb host platform shall not affect its functionality. These routines are written using shifting and byte operations that will produce the same result regardless of whether the host platform is little-endian, big-endian or even mixed-endian.
NJB1 and the "series 3 family" (NJB2, NJB3, NJB Zen, NJB Zen 2.0) have different byte ordering. NJB1 is essentially big-endian, and the series 3 family little-endian. The terminology could be confusing, so we refer to the different endiannesses as "njb1-endian" and "njb3-endian".
void from_16bit_to_njb1_bytes | ( | u_int16_t | val, |
unsigned char * | dp | ||
) |
This function will write the u_int16_t
of the host platform, val
as 2 NJB1-endian bytes beginning at the first byte in the byte array pointed to by *dp
.
val | the unsigned 16 bit integer to convert to bytes |
dp | a pointer to the byte array (of atleast 2 bytes) that shall hold the resulting bytes |
Referenced by songid_pack(), and time_pack().
void from_16bit_to_njb3_bytes | ( | u_int16_t | val, |
unsigned char * | dp | ||
) |
This function will write the u_int16_t
of the host platform, val
as 2 series 3-endian bytes beginning at the first byte in the byte array pointed to by *dp
.
val | the unsigned 16 bit integer to convert to bytes |
dp | a pointer to the byte array (of atleast 2 bytes) that shall hold the resulting bytes |
Referenced by new_folder_pack3(), njb3_add_multiple_tracks_to_playlist(), njb3_control_eax_processor(), njb3_create_playlist(), njb3_set_bitmap(), njb3_update_16bit_frame(), and njb3_update_string_frame().
void from_32bit_to_njb1_bytes | ( | u_int32_t | val, |
unsigned char * | dp | ||
) |
This function will write the u_int32_t
of the host platform, val
as 4 NJB1-endian bytes beginning at the first byte in the byte array pointed to by *dp
.
val | the unsigned 32 bit integer to convert to bytes |
dp | a pointer to the byte array (of atleast 4 bytes) that shall hold the resulting bytes |
Referenced by njb_read_eaxtypes(), njb_receive_file_block(), and songid_pack().
void from_32bit_to_njb3_bytes | ( | u_int32_t | val, |
unsigned char * | dp | ||
) |
This function will write the u_int32_t
of the host platform, val
as 4 series 3-endian bytes beginning at the first byte in the byte array pointed to by *dp
.
val | the unsigned 32 bit integer to convert to bytes |
dp | a pointer to the byte array (of atleast 4 bytes) that shall hold the resulting bytes |
Referenced by njb3_add_multiple_tracks_to_playlist(), njb3_announce_firmware(), njb3_request_file_chunk(), njb3_set_bitmap(), njb3_update_16bit_frame(), njb3_update_string_frame(), and njb3_update_tag().
void from_64bit_to_njb1_bytes | ( | u_int64_t | val, |
unsigned char * | dp | ||
) |
This function will write the u_int64_t
of the host platform, val
as NJB1-endian bytes beginning at the first byte in the byte array pointed to by *dp
.
val | the unsigned 64 bit integer to convert to bytes |
dp | a pointer to the byte array (of atleast 8 bytes) that shall hold the resulting bytes |
Referenced by njb_set_library_counter().
u_int16_t get_lsw | ( | u_int32_t | word | ) |
This simply extract the least significant 16 bit parts of a 32 bit word.
word | the 32 bit word to get the least significant 16 bits for |
u_int16_t get_msw | ( | u_int32_t | word | ) |
This simply extract the most significant 16 bit parts of a 32 bit word.
word | the 32 bit word to get the most significant 16 bits for |
u_int64_t make64 | ( | u_int32_t | msdw, |
u_int32_t | lsdw | ||
) |
Create a 64 bit unsigned integer from two 32 bit integers representing the most/least significant part of it.
msdw | the most significant 32 bits |
lsdw | the least significant 32 bits |
u_int16_t njb1_bytes_to_16bit | ( | unsigned char * | dp | ) |
This function will take 2 bytes from the NJB1-endian byte array pointed to by *dp
and transform it to a u_int16_t
unsigned 16 bit integer on the host platform.
dp | a pointer to the 2 raw bytes in NJB1 endianness to convert |
Referenced by datafile_unpack(), playlist_unpack(), songid_unpack(), and time_unpack().
u_int32_t njb1_bytes_to_32bit | ( | unsigned char * | dp | ) |
This function will take 4 bytes from the NJB1-endian byte array pointed to by *dp
and transform it to a u_int32_t
on the host platform.
dp | a pointer to the 4 raw bytes in NJB1 endianness to convert |
Referenced by njb_get_datafile_header(), njb_get_playlist_header(), njb_get_track_tag_header(), njb_read_eaxtypes(), and playlist_unpack().
u_int64_t njb1_bytes_to_64bit | ( | unsigned char * | dp | ) |
This function will take 8 bytes from the njb1-endian byte array pointed to by *dp
and transform it to a u_int64_t
on the host platform.
dp | a pointer to the 8 raw bytes in NJB1 endianness to convert |
Referenced by datafile_unpack(), njb_get_disk_usage(), and njb_get_library_counter().
u_int16_t njb3_bytes_to_16bit | ( | unsigned char * | dp | ) |
This function will take 2 bytes from the series 3-endian byte array pointed to by *dp
and transform it to a u_int16_t
unsigned 16 bit integer on the host platform.
dp | a pointer to the 2 raw bytes in series 3 endianness to convert |
u_int32_t njb3_bytes_to_32bit | ( | unsigned char * | dp | ) |
This function will take 4 bytes from the series 3-endian byte array pointed to by *dp
and transform it to a u_int32_t
on the host platform.
dp | a pointer to the 4 raw bytes in series 3 endianness to convert |
void split64 | ( | u_int64_t | num, |
u_int32_t * | msdw, | ||
u_int32_t * | lsdw | ||
) |
Split a 64 bit unsigned integer into two unsigned 32 bit integer representing the most/least significant 32 bits of the incoming 64 bit integer.
num | the 64 bit integer to split |
msdw | a pointer to the 32 bit integer that shall hold the most significant 32 bits of the 64 bit integer |
lsdw | a pointer to the 32 bit integer that shall hold the least significant 32 bits of the 64 bit integer |