FreeCalypso > hg > freecalypso-tools
view uptools/libcoding/gsm7_encode.c @ 797:ef501e258036
doc/opt-freecalypso-tree: add sim-data and sim-scripts
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 19 Mar 2021 06:17:58 +0000 |
parents | 061f8d75083d |
children | ec7e23d5151f |
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/* * This library module implements the function for encoding from ISO 8859-1 * into the GSM 7-bit default alphabet (03.38 or 23.038). */ #include <sys/types.h> extern u_char gsm7_encode_table[256]; latin1_to_gsm7(inbuf, outbuf, outmax, outlenp) u_char *inbuf, *outbuf; unsigned outmax, *outlenp; { u_char *ip = inbuf, *op = outbuf; unsigned outcnt = 0, c, n; while (c = *ip++) { c = gsm7_encode_table[c]; if (c == 0xFF) return(-1); if (c & 0x80) n = 2; else n = 1; if (outcnt + n > outmax) return(-2); if (c & 0x80) { *op++ = 0x1B; *op++ = c & 0x7F; } else *op++ = c; outcnt += n; } *outlenp = outcnt; return(0); }