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annotate lwar/extract.c @ 402:b20f14edda5a

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Completed initial conversion to new parser allowing spaces in operands Converted the remaining addressing modes. This required a complete rewrite of a large portion of the indexed addressing parser. Now the entire indexed parsing system is programmatic without cheating with a lookup table. This update also fixes the "force 0,r" by writing a literal 0,r which is *supposed* to work. There will likely be some pseudo ops that need tweaking for space handling, specially those that take multiple operands of some description which are not expressions. (The expression parser call eats the spaces both before and after the expression, if appropriate.)
author William Astle <lost@l-w.ca>
date Wed, 14 Oct 2015 20:49:41 -0600
parents 6f4c4d59666f
children 45df37e81741
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 /*
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2 extract.c
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWAR.
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6
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7 LWAR is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 */
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21
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22 #include <errno.h>
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23 #include <stdio.h>
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24 #include <stdlib.h>
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25 #include <string.h>
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26
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27 #include "lwar.h"
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28
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29 void do_extract(void)
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30 {
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31 FILE *f;
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32 char buf[8];
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33 long l;
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34 int c;
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35 char fnbuf[1024];
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36 int i;
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37 FILE *nf;
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38
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39 f = fopen(archive_file, "rb");
0
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40 if (!f)
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41 {
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42 perror("Opening archive file");
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43 exit(1);
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44 }
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45
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46 (void)(fread(buf, 1, 6, f) && 1);
0
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47 if (memcmp("LWAR1V", buf, 6))
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48 {
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49 fprintf(stderr, "%s is not a valid archive file.\n", archive_file);
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50 exit(1);
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51 }
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52
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53 for (;;)
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54 {
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55 c = fgetc(f);
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56 if (ferror(f))
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57 {
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58 perror("Reading archive file");
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59 exit(1);
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60 }
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61 if (c == EOF)
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62 return;
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63
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64
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65 // find the end of the file name
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66 if (!c)
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67 return;
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68
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69 i = 0;
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70 while (c)
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71 {
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72 fnbuf[i++] = c;
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73 c = fgetc(f);
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74 if (c == EOF || ferror(f))
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75 {
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76 fprintf(stderr, "Bad archive file\n");
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77 exit(1);
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78 }
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79 }
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80 fnbuf[i] = 0;
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81
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82 // get length of archive member
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83 l = 0;
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84 c = fgetc(f);
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85 l = c << 24;
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86 c = fgetc(f);
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87 l |= c << 16;
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88 c = fgetc(f);
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89 l |= c << 8;
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90 c = fgetc(f);
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91 l |= c;
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92
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93 for (i = 0; i < nfiles; i++)
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94 {
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95 if (!strcmp(files[i], fnbuf))
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96 break;
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97 }
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98 if (i < nfiles || nfiles == 0)
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99 {
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100 // extract the file
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101 nf = fopen(fnbuf, "wb");
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102 if (!nf)
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103 {
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104 fprintf(stderr, "Cannot extract '%s': %s\n", fnbuf, strerror(errno));
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105 exit(1);
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106 }
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107 while (l)
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108 {
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109 c = fgetc(f);
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110 fputc(c, nf);
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111 l--;
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112 }
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113 fclose(nf);
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114 }
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115 else
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116 {
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117 // skip the file
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118 fseek(f, l, SEEK_CUR);
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119 }
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120 }
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121 }