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gsm.h
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gsm.h
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#ifndef _android_gsm_h
#define _android_gsm_h
/** USEFUL TYPES
**/
typedef unsigned char byte_t;
typedef byte_t* bytes_t;
typedef const byte_t* cbytes_t;
/** BCD
**/
/* convert a 8-bit value into the corresponding nibble-bcd byte */
extern byte_t gsm_int_to_bcdi( int value );
/* convert a nibble-bcd byte into an int, invalid nibbles are silently converted to 0 */
extern int gsm_int_from_bcdi( byte_t value );
/** HEX
**/
/* convert a hex string into a byte string, assumes 'dst' is properly sized, and hexlen is even */
extern void gsm_hex_to_bytes ( cbytes_t hex, int hexlen, bytes_t dst );
/* convert a byte string into a hex string, assumes 'hex' is properly sized */
extern void gsm_hex_from_bytes( char* hex, cbytes_t src, int srclen );
/* convert a hexchar to an int, returns -1 on error */
extern int gsm_hexchar_to_int( char c );
/* convert a hexchar to an int, returns 0 on error */
extern int gsm_hexchar_to_int0( char c );
/* convert a 2-char hex value into an int, returns -1 on error */
extern int gsm_hex2_to_byte( const char* hex );
/* convert a 2-char hex value into an int, returns 0 on error */
extern int gsm_hex2_to_byte0( const char* hex );
/* convert a 4-char hex value into an int, returns -1 on error */
extern int gsm_hex4_to_short( const char* hex );
/* convert a 4-char hex value into an int, returns 0 on error */
extern int gsm_hex4_to_short0( const char* hex );
/* write a byte to a 2-byte hex string */
extern void gsm_hex_from_byte( char* hex, int val );
extern void gsm_hex_from_short( char* hex, int val );
/** UTF-8 and GSM Alphabet
**/
/* check that a given utf8 string is well-formed, returns 1 on success, 0 otherwise */
extern int utf8_check( cbytes_t utf8, int utf8len );
/* check that all characters in a given utf8 string can be encoded into the GSM alphabet.
returns 1 if TRUE, 0 otherwise */
extern int utf8_check_gsm7( cbytes_t utf8, int utf8len );
/* convert a utf-8 string into a GSM septet string, assumes 'dst' is NULL or is properly sized,
and that all characters are representable. 'offset' is the starting bit offset in 'dst'.
non-representable characters are replaced by spaces.
returns the number of septets, */
extern int utf8_to_gsm7( cbytes_t utf8, int utf8len, bytes_t dst, int offset );
/* convert a utf8 string into an array of 8-bit unpacked GSM septets,
* assumes 'dst' is NULL or is properly sized, returns the number of GSM bytes */
extern int utf8_to_gsm8( cbytes_t utf8, int utf8len, bytes_t dst );
/* convert a GSM septets string into a utf-8 byte string. assumes that 'utf8' is NULL or properly
sized. 'offset' is the starting bit offset in 'src', 'count' is the number of input septets.
return the number of utf8 bytes. */
extern int utf8_from_gsm7( cbytes_t src, int offset, int count, bytes_t utf8 );
/* convert an unpacked 8-bit GSM septets string into a utf-8 byte string. assumes that 'utf8'
is NULL or properly sized. 'count' is the number of input bytes.
returns the number of utf8 bytes */
extern int utf8_from_gsm8( cbytes_t src, int count, bytes_t utf8 );
/** UCS-2 and GSM Alphabet
**
** Note that here, 'ucs2' really refers to non-aligned UCS2-BE, as used by the GSM standard
**/
/* check that all characters in a given ucs2 string can be encoded into the GSM alphabet.
returns 1 if TRUE, 0 otherwise */
extern int ucs2_check_gsm7( cbytes_t ucs2, int ucs2len );
/* convert a ucs2 string into a GSM septet string, assumes 'dst' is NULL or properly sized,
'offset' is the starting bit offset in 'dst'. non-representable characters are replaced
by spaces. returns the number of septets */
extern int ucs2_to_gsm7( cbytes_t ucs2, int ucs2len, bytes_t dst, int offset );
/* convert a ucs2 string into a GSM septet string, assumes 'dst' is NULL or properly sized,
non-representable characters are replaced by spaces. returns the number of bytes */
extern int ucs2_to_gsm8( cbytes_t ucs2, int ucs2len, bytes_t dst );
/* convert a GSM septets string into a ucs2 string. assumes that 'ucs2' is NULL or
properly sized. 'offset' is the starting bit offset in 'src', 'count' is the number
of input septets. return the number of ucs2 characters (not bytes) */
extern int ucs2_from_gsm7( bytes_t ucs2, cbytes_t src, int offset, int count );
/* convert an 8-bit unpacked GSM septets string into a ucs2 string. assumes that 'ucs2'
is NULL or properly sized. 'count' is the number of input septets. return the number
of ucs2 characters (not bytes) */
extern int ucs2_from_gsm8( bytes_t ucs2, cbytes_t src, int count );
/** UCS2 to/from UTF8
**/
/* convert a ucs2 string into a utf8 byte string, assumes 'utf8' NULL or properly sized.
returns the number of utf8 bytes*/
extern int ucs2_to_utf8( cbytes_t ucs2, int ucs2len, bytes_t utf8 );
/* convert a utf8 byte string into a ucs2 string, assumes 'ucs2' NULL or properly sized.
returns the number of ucs2 chars */
extern int utf8_to_ucs2( cbytes_t utf8, int utf8len, bytes_t ucs2 );
/* try to skip a given number of characters in a utf-8 byte string, return new position */
extern cbytes_t utf8_skip( cbytes_t utf8, cbytes_t utf8end, int count);
/** Dial Numbers: TON byte + 'count' bcd numbers
**/
/* convert a bcd-coded GSM dial number into an ASCII string (not zero-terminated)
assumes 'dst' is NULL or properly sized, returns 0 in case of success, -1 in case of error.
'num_digits' is the number of digits, not input bytes. a trailing 0xf0 is ignored automatically
return the number of ASCII chars */
extern int gsm_bcdnum_to_ascii ( cbytes_t bcd, int num_digits, bytes_t dst );
/* convert an ASCII dial-number into a bcd-coded string, returns the number of 4-bit nibbles written, */
extern int gsm_bcdnum_from_ascii( cbytes_t ascii, int asciilen, bytes_t dst );
/** ADN: Abbreviated Dialing Numbers
**/
#define SIM_ADN_MAX_ALPHA 20 /* maximum number of characters in ADN alpha tag */
#define SIM_ADN_MAX_NUMBER 20 /* maximum digits in ADN number */
typedef struct {
byte_t alpha [ SIM_ADN_MAX_ALPHA*3+1 ]; /* alpha tag in zero-terminated utf-8 */
char number[ SIM_ADN_MAX_NUMBER+1 ]; /* dialing number in zero-terminated ASCII */
}
SimAdnRec, *SimAdn;
typedef struct {
SimAdnRec adn;
byte_t ext_record; /* 0 or 0xFF means no extension */
}
SimAdnRecordRec, *SimAdnRecord;
extern int sim_adn_record_from_bytes( SimAdnRecord rec, cbytes_t data, int datalen );
extern int sim_adn_record_to_bytes ( SimAdnRecord rec, bytes_t data, int datalen );
/** ROPES
**/
typedef struct {
bytes_t data;
int max;
int pos;
int error;
unsigned char data0[16];
} GsmRopeRec, *GsmRope;
extern void gsm_rope_init( GsmRope rope );
extern void gsm_rope_init_alloc( GsmRope rope, int alloc );
extern int gsm_rope_done( GsmRope rope );
extern bytes_t gsm_rope_done_acquire( GsmRope rope, int *psize );
extern void gsm_rope_add_c( GsmRope rope, char c );
extern void gsm_rope_add( GsmRope rope, const void* str, int len );
extern void* gsm_rope_reserve( GsmRope rope, int len );
#endif /* _android_gsm_h */