FreeCalypso > hg > sms-coding-utils
view enc-text/gsm7.c @ 17:dc1cc851025c
scripts: add support for new first octet flags
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 27 Aug 2023 07:39:14 +0000 |
parents | 265b8103530c |
children | e56bb9f09ff1 |
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/* * In this module we implement SMS encoding in GSM7. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <unistd.h> #include "defs.h" extern int utf8_input; extern int concat_enable, concat_refno_set; extern char msgtext[MAX_MSG_CHARS*2+2]; extern u_char concat_refno; gsm7_mode_main() { u_char msgtext_gsm7[MAX_MSG_CHARS]; unsigned msgtext_gsmlen; int rc; unsigned nparts, n; u_char udh[6]; unsigned pos, remain, chunk; if (utf8_input && utf8_to_latin1(msgtext) < 0) { fprintf(stderr, "error: invalid UTF-8 message\n"); exit(1); } rc = latin1_to_gsm7(msgtext, msgtext_gsm7, MAX_MSG_CHARS, &msgtext_gsmlen); if (rc == -1) { fprintf(stderr, "error: message not valid for GSM7 charset\n"); exit(1); } if (rc == -2) { fprintf(stderr, "error: message too long for max concat SMS\n"); exit(1); } if (msgtext_gsmlen <= 160) { fputs("dcs 0 septet\nmsg ", stdout); if (msgtext_gsmlen) emit_hex_out(msgtext_gsm7, msgtext_gsmlen, stdout); else { putchar('"'); putchar('"'); } putchar('\n'); exit(0); } if (!concat_enable) { fprintf(stderr, "error: message exceeds 160 chars\n"); exit(1); } if (!concat_refno_set) concat_refno = get_concsms_refno_from_host_fs(); puts("dcs 0 septet"); nparts = (msgtext_gsmlen + 152) / 153; udh[0] = 5; udh[1] = 0x00; udh[2] = 0x03; udh[3] = concat_refno; udh[4] = nparts; pos = 0; remain = msgtext_gsmlen; for (n = 1; n <= nparts; n++) { udh[5] = n; chunk = 153; if (chunk > remain) chunk = remain; fputs("msg-udh ", stdout); emit_hex_out(udh, 6, stdout); emit_hex_out(msgtext_gsm7 + pos, chunk, stdout); putchar('\n'); pos += chunk; remain -= chunk; } exit(0); }