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annotate librftab/readtxramp.c @ 469:fd4af8023ce6

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CHANGES: null pointer passing fixes documented
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 11 Feb 2019 22:51:17 +0000
parents a0f79bba0ad8
children
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a0f79bba0ad8 librftab: reading of Tx ramp template files split from rftablerd module
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * Reading Tx ramp templates from formatted ASCII files, used for the ttw
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3 * 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_txramp_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 u_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 Tx ramp template\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 = strtoul(field, 0, 0);
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34 *writeptr++ = number;
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35 return(0);
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36 }
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37
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38 static
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39 read_txramp_16num()
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40 {
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41 int i, rc;
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42
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43 for (i = 0; i < 16; i++) {
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44 rc = process_txramp_number();
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45 if (rc)
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46 return(rc);
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47 }
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48 return(0);
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49 }
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50
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51 read_tx_ramp_template(filename_arg, rdbuf)
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52 char *filename_arg;
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53 u_char *rdbuf;
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54 {
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55 char *field;
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56 int rc;
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57
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58 filename = filename_arg;
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59 rdfile = fopen(filename, "r");
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60 if (!rdfile) {
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61 perror(filename);
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62 return(ERROR_UNIX);
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63 }
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64 lineno = 0;
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65 line_nfields = 0;
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66 rc = get_field(&field);
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67 if (rc <= 0) {
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68 not_valid_ramp_file:
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69 printf("error: %s is not a valid Tx ramp template file\n",
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70 filename);
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71 fclose(rdfile);
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72 return(ERROR_USAGE);
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73 }
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74 if (strcmp(field, "ramp-up"))
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75 goto not_valid_ramp_file;
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76 writeptr = rdbuf;
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77 rc = read_txramp_16num();
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78 if (rc) {
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79 fclose(rdfile);
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80 return(rc);
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81 }
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82 rc = get_field(&field);
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83 if (rc <= 0)
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84 goto not_valid_ramp_file;
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85 if (strcmp(field, "ramp-down"))
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86 goto not_valid_ramp_file;
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87 rc = read_txramp_16num();
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88 if (rc) {
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89 fclose(rdfile);
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90 return(rc);
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91 }
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92 rc = get_field(&field);
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93 fclose(rdfile);
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94 if (rc < 0)
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95 return(ERROR_USAGE);
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96 if (rc) {
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97 printf("error: %s is too long for a Tx ramp template\n",
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98 filename);
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99 return(ERROR_USAGE);
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100 }
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101 return(0);
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102 }