FreeCalypso > hg > fc-sim-tools
annotate libutil/hexread.c @ 8:34bbb0585cab
libutil: import from previous fc-pcsc-tools version
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 Mar 2021 05:42:37 +0000 |
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libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This module contains the function for reading hex files, |
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3 * to be used in the implementation of manual write commands. |
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4 */ |
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5 |
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6 #include <sys/types.h> |
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7 #include <ctype.h> |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 |
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11 extern FILE *open_script_input_file(); |
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12 |
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13 read_hex_data_file(filename, databuf, maxlen) |
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14 char *filename; |
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15 u_char *databuf; |
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16 unsigned maxlen; |
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17 { |
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18 FILE *inf; |
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19 unsigned count; |
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20 int c, c2; |
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21 |
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22 inf = open_script_input_file(filename); |
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23 if (!inf) { |
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24 perror(filename); |
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25 return(-1); |
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26 } |
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27 for (count = 0; ; ) { |
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28 do |
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29 c = getc(inf); |
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30 while (isspace(c)); |
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31 if (c < 0) |
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32 break; |
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33 if (c == '#') { |
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34 do |
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35 c = getc(inf); |
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36 while (c >= 0 && c != '\n'); |
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37 continue; |
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38 } |
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39 if (!isxdigit(c)) { |
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40 inv_input: fprintf(stderr, "%s: invalid hex file input\n", |
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41 filename); |
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42 fclose(inf); |
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43 return(-1); |
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44 } |
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45 c2 = getc(inf); |
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46 if (!isxdigit(c2)) |
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47 goto inv_input; |
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48 if (count >= maxlen) { |
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49 fprintf(stderr, "%s: hex input data is too long\n", |
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50 filename); |
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51 fclose(inf); |
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52 return(-1); |
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53 } |
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54 databuf[count++] = (decode_hex_digit(c) << 4) | |
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55 decode_hex_digit(c2); |
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56 } |
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57 fclose(inf); |
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58 if (!count) { |
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59 fprintf(stderr, "%s: no hex data input found\n", filename); |
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60 return(-1); |
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61 } |
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62 return(count); |
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63 } |