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annotate uptools/libcoding/gsm7_encode.c @ 416:30f6d1c32c6f

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doc/Flash-boot-defect article removed (no longer relevant) This article is no longer relevant because the issue in question only affected one (1) defective FCDEV3B board which was not and never will be sold.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 26 Oct 2018 07:11:08 +0000
parents 061f8d75083d
children ec7e23d5151f
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dbeb4a5628f5 uptools/libcoding: implemented 8859-1 -> GSM7 encoding function
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This library module implements the function for encoding from ISO 8859-1
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3 * into the GSM 7-bit default alphabet (03.38 or 23.038).
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4 */
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5
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6 #include <sys/types.h>
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7
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8 extern u_char gsm7_encode_table[256];
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9
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10 latin1_to_gsm7(inbuf, outbuf, outmax, outlenp)
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11 u_char *inbuf, *outbuf;
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12 unsigned outmax, *outlenp;
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13 {
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14 u_char *ip = inbuf, *op = outbuf;
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15 unsigned outcnt = 0, c, n;
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16
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17 while (c = *ip++) {
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18 c = gsm7_encode_table[c];
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19 if (c == 0xFF)
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20 return(-1);
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21 if (c & 0x80)
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22 n = 2;
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23 else
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24 n = 1;
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25 if (outcnt + n > outmax)
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26 return(-2);
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27 if (c & 0x80) {
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28 *op++ = 0x1B;
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29 *op++ = c & 0x7F;
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30 } else
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31 *op++ = c;
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061f8d75083d uptools/libcoding/gsm7_encode.c: bug found on review
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32 outcnt += n;
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33 }
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34 *outlenp = outcnt;
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35 return(0);
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36 }