bitstring.c

Include dependency graph for bitstring.c:

Functions

static inline uint64_t from_le64(uint64_t value)

bool bitstring_extract_any_integer(const uint8_t *src, size_t offset, avm_int_t n, enum BitstringFlags bs_flags, union maybe_unsigned_int64 *dst)

bool bitstring_insert_any_integer(uint8_t *dst, avm_int_t offset, avm_int64_t value, size_t n, enum BitstringFlags bs_flags)

static bool is_invalid_codepoint(int32_t v)

bool bitstring_utf8_encode(uint32_t c, uint8_t *buf, size_t *out_size)

Encode a character to UTF-8.

Parameters:

• c – character to encode

• buf – the buffer to encode the sring to or NULL to only compute the size.

• out_size – the size in bytes, on output (if not NULL)

Returns:

true if encoding was successful, false if c is not a valid unicode character

enum UnicodeTransformDecodeResult bitstring_utf8_decode(const uint8_t *buf, size_t len, uint32_t *c, size_t *out_size)

Decode a character from UTF-8.

Parameters:

• buf – the buffer from which to decode the string

• len – the length (in bytes) of the bytes in buf

• c – int value to decode to or NULL to only compute the size.

• out_size – the size in bytes, on output (if not NULL)

Returns:

UnicodeTransformDecodeSuccess if decoding was successful, UnicodeTransformDecodeFail if character starting at buf is not a valid unicode character or UnicodeTransformDecodeIncomplete if character starting at buf is a valid but incomplete transformation

bool bitstring_utf16_encode(uint32_t c, uint8_t *buf, enum BitstringFlags bs_flags, size_t *out_size)

Encode a character to UTF-16.

Parameters:

• c – character to encode

• buf – the buffer to encode the character to or NULL to only compute the size.

• bs_flags – flags to encode the character (undefined/little/big/native)

• out_size – the size in bytes, on output (if not NULL)

Returns:

true if encoding was successful, false if c is not a valid unicode character

bool bitstring_utf16_decode(const uint8_t *buf, size_t len, int32_t *c, size_t *out_size, enum BitstringFlags bs_flags)

Decode a character from UTF-16.

Parameters:

• c – int value to decode to

• buf – the buffer froom which to decode the sring to or NULL to only compute the size.

• len – the length (in bytes) of the bytes in buf

• bs_flags – flags to decode the character (undefined/little/big/native)

• out_size – the size in bytes, on output (if not NULL)

Returns:

true if decoding was successful, false if character starting at buf is not a valid unicode character

bool bitstring_utf32_encode(uint32_t c, uint8_t *buf, enum BitstringFlags bs_flags)

Encode a character to UTF-32.

Parameters:

• c – character to encode

• buf – the buffer to encode the character

• bs_flags – flags to encode the character (undefined/little/big/native)

Returns:

true if encoding was successful, false if c is not a valid unicode character

bool bitstring_utf32_decode(const uint8_t *buf, size_t len, int32_t *c, enum BitstringFlags bs_flags)

Decode a character from UTF-32.

Parameters:

• c – int value to decode to

• buf – the buffer froom which to decode the sring to or NULL to only compute the size.

• len – the length (in bytes) of the bytes in buf

• bs_flags – flags to decode the character (undefined/little/big/native)

Returns:

true if decoding was successful, false if character starting at buf is not a valid unicode character

void bitstring_copy_bits_incomplete_bytes(uint8_t *dst, size_t bits_offset, const uint8_t *src, size_t bits_count)

Copy bits_count bits from src to dst[bits_offset..].

Called by bitstring_copy_bits when bytes are not complete.

Parameters:

• dst – destination buffer

• bits_offset – offset in bits in destination buffer

• src – source buffer

• bits_count – number of bits

bool bitstring_extract_f32(term src_bin, size_t offset, avm_int_t n, enum BitstringFlags bs_flags, avm_float_t *dst)

bool bitstring_extract_f64(term src_bin, size_t offset, avm_int_t n, enum BitstringFlags bs_flags, avm_float_t *dst)