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annotate librftab/readfir.c @ 585:d3e2b23ebf1d

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doc/Target-boot-control: finished for now
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 03 Feb 2020 05:22:21 +0000
parents 9178594bc283
children
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9178594bc283 librftab: implemented reading of FIR coefficient tables
Mychaela Falconia <falcon@freecalypso.org>
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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 }