1 /* Copyright (C) 2007-2008 The Android Open Source Project 2 ** 3 ** This software is licensed under the terms of the GNU General Public 4 ** License version 2, as published by the Free Software Foundation, and 5 ** may be copied, distributed, and modified under those terms. 6 ** 7 ** This program is distributed in the hope that it will be useful, 8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 ** GNU General Public License for more details. 11 */ 12 #ifndef _android_gsm_h 13 #define _android_gsm_h 14 15 /** USEFUL TYPES 16 **/ 17 18 typedef unsigned char byte_t; 19 typedef byte_t* bytes_t; 20 typedef const byte_t* cbytes_t; 21 22 /** BCD 23 **/ 24 25 /* convert a 8-bit value into the corresponding nibble-bcd byte */ 26 extern byte_t gsm_int_to_bcdi( int value ); 27 28 /* convert a nibble-bcd byte into an int, invalid nibbles are silently converted to 0 */ 29 extern int gsm_int_from_bcdi( byte_t value ); 30 31 /** HEX 32 **/ 33 34 /* try to convert a hex string into a byte string, assumes 'dst' is properly sized, and hexlen is even. 35 * returns the number of bytes on exit, or -1 in case of badly formatted data */ 36 extern int gsm_hex_to_bytes ( cbytes_t hex, int hexlen, bytes_t dst ); 37 38 /* convert a hex string into a byte string, assumes 'dst' is properly sized, and hexlen is even. 39 * no checks are performed */ 40 extern void gsm_hex_to_bytes0 ( cbytes_t hex, int hexlen, bytes_t dst ); 41 42 /* convert a byte string into a hex string, assumes 'hex' is properly sized */ 43 extern void gsm_hex_from_bytes( char* hex, cbytes_t src, int srclen ); 44 45 /* convert a hexchar to an int, returns -1 on error */ 46 extern int gsm_hexchar_to_int( char c ); 47 48 /* convert a hexchar to an int, returns 0 on error */ 49 extern int gsm_hexchar_to_int0( char c ); 50 51 /* convert a 2-char hex value into an int, returns -1 on error */ 52 extern int gsm_hex2_to_byte( const char* hex ); 53 54 /* convert a 2-char hex value into an int, returns 0 on error */ 55 extern int gsm_hex2_to_byte0( const char* hex ); 56 57 /* convert a 4-char hex value into an int, returns -1 on error */ 58 extern int gsm_hex4_to_short( const char* hex ); 59 60 /* convert a 4-char hex value into an int, returns 0 on error */ 61 extern int gsm_hex4_to_short0( const char* hex ); 62 63 /* write a byte to a 2-byte hex string */ 64 extern void gsm_hex_from_byte( char* hex, int val ); 65 66 extern void gsm_hex_from_short( char* hex, int val ); 67 68 /** UTF-8 and GSM Alphabet 69 **/ 70 71 /* check that a given utf8 string is well-formed, returns 1 on success, 0 otherwise */ 72 extern int utf8_check( cbytes_t utf8, int utf8len ); 73 74 /* check that all characters in a given utf8 string can be encoded into the GSM alphabet. 75 returns 1 if TRUE, 0 otherwise */ 76 extern int utf8_check_gsm7( cbytes_t utf8, int utf8len ); 77 78 /* try to skip enough utf8 characters to generate gsm7len GSM septets */ 79 extern cbytes_t utf8_skip_gsm7( cbytes_t utf8, cbytes_t utf8end, int gsm7len ); 80 81 /* convert a utf-8 string into a GSM septet string, assumes 'dst' is NULL or is properly sized, 82 and that all characters are representable. 'offset' is the starting bit offset in 'dst'. 83 non-representable characters are replaced by spaces. 84 returns the number of septets, */ 85 extern int utf8_to_gsm7( cbytes_t utf8, int utf8len, bytes_t dst, int offset ); 86 87 /* convert a utf8 string into an array of 8-bit unpacked GSM septets, 88 * assumes 'dst' is NULL or is properly sized, returns the number of GSM bytes */ 89 extern int utf8_to_gsm8( cbytes_t utf8, int utf8len, bytes_t dst ); 90 91 /* convert a GSM septets string into a utf-8 byte string. assumes that 'utf8' is NULL or properly 92 sized. 'offset' is the starting bit offset in 'src', 'count' is the number of input septets. 93 return the number of utf8 bytes. */ 94 extern int utf8_from_gsm7( cbytes_t src, int offset, int count, bytes_t utf8 ); 95 96 /* convert an unpacked 8-bit GSM septets string into a utf-8 byte string. assumes that 'utf8' 97 is NULL or properly sized. 'count' is the number of input bytes. 98 returns the number of utf8 bytes */ 99 extern int utf8_from_gsm8( cbytes_t src, int count, bytes_t utf8 ); 100 101 102 /** UCS-2 and GSM Alphabet 103 ** 104 ** Note that here, 'ucs2' really refers to non-aligned UCS2-BE, as used by the GSM standard 105 **/ 106 107 /* check that all characters in a given ucs2 string can be encoded into the GSM alphabet. 108 returns 1 if TRUE, 0 otherwise */ 109 extern int ucs2_check_gsm7( cbytes_t ucs2, int ucs2len ); 110 111 /* convert a ucs2 string into a GSM septet string, assumes 'dst' is NULL or properly sized, 112 'offset' is the starting bit offset in 'dst'. non-representable characters are replaced 113 by spaces. returns the number of septets */ 114 extern int ucs2_to_gsm7( cbytes_t ucs2, int ucs2len, bytes_t dst, int offset ); 115 116 /* convert a ucs2 string into a GSM septet string, assumes 'dst' is NULL or properly sized, 117 non-representable characters are replaced by spaces. returns the number of bytes */ 118 extern int ucs2_to_gsm8( cbytes_t ucs2, int ucs2len, bytes_t dst ); 119 120 /* convert a GSM septets string into a ucs2 string. assumes that 'ucs2' is NULL or 121 properly sized. 'offset' is the starting bit offset in 'src', 'count' is the number 122 of input septets. return the number of ucs2 characters (not bytes) */ 123 extern int ucs2_from_gsm7( bytes_t ucs2, cbytes_t src, int offset, int count ); 124 125 /* convert an 8-bit unpacked GSM septets string into a ucs2 string. assumes that 'ucs2' 126 is NULL or properly sized. 'count' is the number of input septets. return the number 127 of ucs2 characters (not bytes) */ 128 extern int ucs2_from_gsm8( bytes_t ucs2, cbytes_t src, int count ); 129 130 131 /** UCS2 to/from UTF8 132 **/ 133 134 /* convert a ucs2 string into a utf8 byte string, assumes 'utf8' NULL or properly sized. 135 returns the number of utf8 bytes*/ 136 extern int ucs2_to_utf8( cbytes_t ucs2, int ucs2len, bytes_t utf8 ); 137 138 /* convert a utf8 byte string into a ucs2 string, assumes 'ucs2' NULL or properly sized. 139 returns the number of ucs2 chars */ 140 extern int utf8_to_ucs2( cbytes_t utf8, int utf8len, bytes_t ucs2 ); 141 142 /* try to skip a given number of characters in a utf-8 byte string, return new position */ 143 extern cbytes_t utf8_skip( cbytes_t utf8, cbytes_t utf8end, int count); 144 145 /** Dial Numbers: TON byte + 'count' bcd numbers 146 **/ 147 148 /* convert a bcd-coded GSM dial number into an ASCII string (not zero-terminated) 149 assumes 'dst' is NULL or properly sized, returns 0 in case of success, -1 in case of error. 150 'num_digits' is the number of digits, not input bytes. a trailing 0xf0 is ignored automatically 151 return the number of ASCII chars */ 152 extern int gsm_bcdnum_to_ascii ( cbytes_t bcd, int num_digits, bytes_t dst ); 153 154 /* convert an ASCII dial-number into a bcd-coded string, returns the number of 4-bit nibbles written, */ 155 extern int gsm_bcdnum_from_ascii( cbytes_t ascii, int asciilen, bytes_t dst ); 156 157 /** ADN: Abbreviated Dialing Numbers 158 **/ 159 #define SIM_ADN_MAX_ALPHA 20 /* maximum number of characters in ADN alpha tag */ 160 #define SIM_ADN_MAX_NUMBER 20 /* maximum digits in ADN number */ 161 162 typedef struct { 163 byte_t alpha [ SIM_ADN_MAX_ALPHA*3+1 ]; /* alpha tag in zero-terminated utf-8 */ 164 char number[ SIM_ADN_MAX_NUMBER+1 ]; /* dialing number in zero-terminated ASCII */ 165 } 166 SimAdnRec, *SimAdn; 167 168 typedef struct { 169 SimAdnRec adn; 170 byte_t ext_record; /* 0 or 0xFF means no extension */ 171 } 172 SimAdnRecordRec, *SimAdnRecord; 173 174 extern int sim_adn_record_from_bytes( SimAdnRecord rec, cbytes_t data, int datalen ); 175 extern int sim_adn_record_to_bytes ( SimAdnRecord rec, bytes_t data, int datalen ); 176 177 /** ROPES 178 **/ 179 180 typedef struct { 181 bytes_t data; 182 int max; 183 int pos; 184 int error; 185 unsigned char data0[16]; 186 } GsmRopeRec, *GsmRope; 187 188 extern void gsm_rope_init( GsmRope rope ); 189 extern void gsm_rope_init_alloc( GsmRope rope, int alloc ); 190 extern int gsm_rope_done( GsmRope rope ); 191 extern bytes_t gsm_rope_done_acquire( GsmRope rope, int *psize ); 192 extern void gsm_rope_add_c( GsmRope rope, char c ); 193 extern void gsm_rope_add( GsmRope rope, const void* str, int len ); 194 extern void* gsm_rope_reserve( GsmRope rope, int len ); 195 196 #endif /* _android_gsm_h */ 197
