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annotate simtool/erasefile.c @ 222:8c151bb01d28

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doc/GrcardSIM2-WEKI-file: update for partial understanding and implementation
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 09 Mar 2021 03:13:41 +0000
parents f1cf569dbba3
children
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1 /*
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2 * This module implements the erase-file command.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <ctype.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "curfile.h"
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12
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13 static
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14 erase_transparent(fill_byte)
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15 {
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16 u_char data[255];
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17 unsigned off, cc;
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18 int rc;
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19
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20 memset(data, fill_byte, 255);
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21 for (off = 0; off < curfile_total_size; off += cc) {
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22 cc = curfile_total_size - off;
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23 if (cc > 255)
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24 cc = 255;
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25 rc = update_bin_op(off, data, cc);
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26 if (rc < 0)
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27 return(rc);
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28 }
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29 return(0);
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30 }
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31
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32 static
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33 erase_records(fill_byte)
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34 {
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35 u_char data[255];
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36 unsigned recno;
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37 int rc;
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38
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39 memset(data, fill_byte, curfile_record_len);
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40 for (recno = 1; recno <= curfile_record_count; recno++) {
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41 rc = update_rec_op(recno, 0x04, data, curfile_record_len);
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42 if (rc < 0)
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43 return(rc);
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44 }
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45 return(0);
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46 }
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47
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48 static
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49 erase_cyclic(fill_byte)
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50 {
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51 u_char data[255];
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52 unsigned count;
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53 int rc;
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55 memset(data, fill_byte, curfile_record_len);
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56 for (count = 0; count < curfile_record_count; count++) {
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57 rc = update_rec_op(0, 0x03, data, curfile_record_len);
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58 if (rc < 0)
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59 return(rc);
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60 }
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61 return(0);
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62 }
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63
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64 cmd_erase_file(argc, argv)
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65 char **argv;
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66 {
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67 int file_id, rc;
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68 unsigned fill_byte;
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70 if (isxdigit(argv[1][0]) && isxdigit(argv[1][1]) &&
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71 isxdigit(argv[1][2]) && isxdigit(argv[1][3]) && !argv[1][4])
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72 file_id = strtoul(argv[1], 0, 16);
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73 else
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74 file_id = find_symbolic_file_name(argv[1]);
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75 if (file_id < 0) {
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76 fprintf(stderr,
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77 "error: file ID argument is not a hex value or a recognized symbolic name\n");
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78 return(-1);
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79 }
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80 rc = select_op(file_id);
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81 if (rc < 0)
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82 return(rc);
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83 rc = parse_ef_select_response();
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84 if (rc < 0)
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85 return(rc);
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86 if (argc > 2) {
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87 fill_byte = strtoul(argv[2], 0, 16);
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88 if (fill_byte > 0xFF) {
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89 fprintf(stderr, "error: invalid fill byte argument\n");
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90 return(-1);
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91 }
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92 } else
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93 fill_byte = 0xFF;
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94 switch (curfile_structure) {
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95 case 0x00:
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96 /* transparent */
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97 rc = erase_transparent(fill_byte);
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98 break;
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99 case 0x01:
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100 /* record-based */
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101 rc = erase_records(fill_byte);
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102 break;
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103 case 0x03:
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104 /* cyclic */
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105 rc = erase_cyclic(fill_byte);
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106 break;
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107 }
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108 return(rc);
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109 }