FreeCalypso > hg > freecalypso-tools
annotate librftab/readfir.c @ 334:f40530e2d48d
uptools/libcoding: GSM timestamp decoding implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 04 Feb 2018 00:01:37 +0000 |
parents | 9178594bc283 |
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rev | line source |
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librftab: implemented reading of FIR coefficient tables
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1 /* |
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2 * Reading FIR coefficient tables from formatted ASCII files, used for the |
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3 * auw-fir command in fc-tmsh. |
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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 <string.h> |
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10 #include <strings.h> |
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11 #include <stdlib.h> |
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12 #include "../rvinterf/include/exitcodes.h" |
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13 |
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14 #include "rdcommon.c" |
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15 |
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16 static u_char *writeptr; |
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17 |
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18 static |
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19 process_number() |
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20 { |
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21 char *field; |
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22 int rc; |
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23 long number; |
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24 |
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25 rc = get_field(&field); |
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26 if (rc < 0) |
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27 return(ERROR_USAGE); |
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28 if (!rc) { |
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29 printf("error: %s is too short for a FIR coefficient table\n", |
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30 filename); |
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31 return(ERROR_USAGE); |
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32 } |
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33 number = strtol(field, 0, 0); |
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34 *writeptr++ = number; |
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35 *writeptr++ = number >> 8; |
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36 return(0); |
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37 } |
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38 |
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39 read_fir_coeff_table(filename_arg, rdbuf) |
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40 char *filename_arg; |
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41 u_char *rdbuf; |
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42 { |
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43 char *field; |
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44 int rc, i; |
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45 |
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46 filename = filename_arg; |
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47 rdfile = fopen(filename, "r"); |
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48 if (!rdfile) { |
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49 perror(filename); |
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50 return(ERROR_UNIX); |
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51 } |
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52 lineno = 0; |
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53 line_nfields = 0; |
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54 rc = get_field(&field); |
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55 if (rc <= 0) { |
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56 not_valid_fir_table: |
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57 printf("error: %s is not a valid FIR coefficient table file\n", |
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58 filename); |
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59 fclose(rdfile); |
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60 return(ERROR_USAGE); |
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61 } |
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62 if (strcmp(field, "fir-coeff-table")) |
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63 goto not_valid_fir_table; |
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64 writeptr = rdbuf; |
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65 for (i = 0; i < 31; i++) { |
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66 rc = process_number(); |
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67 if (rc) { |
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68 fclose(rdfile); |
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69 return(rc); |
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70 } |
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71 } |
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72 rc = get_field(&field); |
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73 fclose(rdfile); |
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74 if (rc < 0) |
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75 return(ERROR_USAGE); |
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76 if (rc) { |
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77 printf("error: %s is too long for a FIR coefficient table\n", |
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78 filename); |
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79 return(ERROR_USAGE); |
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80 } |
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81 return(0); |
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82 } |