FreeCalypso > hg > freecalypso-tools
view uptools/libcoding/number_encode.c @ 506:0dd2c87c1b63
fc-loadtool flash support overhaul
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 28 May 2019 05:12:47 +0000 |
parents | 7154a231e4b5 |
children |
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/* * This library module implements the function that parses SMS destination * addresses given by the user and encodes them into the GSM 03.40 * TP-Destination-Address structure. */ #include <sys/types.h> #include <ctype.h> #include <stdlib.h> digit_char_to_gsm(ch) { switch (ch) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': return (ch - '0'); case '*': return 0xA; case '#': return 0xB; case 'a': case 'b': case 'c': return (ch - 'a' + 0xC); case 'A': case 'B': case 'C': return (ch - 'A' + 0xC); } return (-1); } parse_and_encode_dest_addr(input, outbuf) char *input; u_char *outbuf; { char *cp, *endp; int d; u_char digits[20]; unsigned n; cp = input; if (*cp == '+') { outbuf[1] = 0x91; cp++; } else outbuf[1] = 0x81; if (digit_char_to_gsm(*cp) < 0) return(-1); n = 0; while ((d = digit_char_to_gsm(*cp)) >= 0) { cp++; if (n >= 20) return(-1); digits[n++] = d; } outbuf[0] = n; while (n < 20) digits[n++] = 0xF; if (*cp == ',') { cp++; if (!isdigit(*cp)) return(-1); outbuf[1] = strtoul(cp, &endp, 0); if (*endp) return(-1); } else if (*cp) return(-1); for (n = 0; n < 10; n++) outbuf[2+n] = (digits[n*2+1] << 4) | digits[n*2]; return(0); }