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annotate lwar/add.c @ 362:d149e2b56981

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Silence tautological comparison warnings Because "char" may be signed or unsigned depending on the system, comparing for byte values 128...255 has to be forced as an unsigned comparison to be portable and clear. Modify two such comparisons in the symbol handling code to treat the symbol offset as a pointer to unsigned. This quiets tautological comparison warnings on systems with an 8 bit signed type as the default char type.
author William Astle <lost@l-w.ca>
date Tue, 26 May 2015 23:42:00 -0600
parents 6f4c4d59666f
children 45df37e81741
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 add.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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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21 Implements the program startup code
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22
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23 */
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24
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25 #include <errno.h>
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26 #include <stdio.h>
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27 #include <stdlib.h>
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
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28 #include <string.h>
0
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29
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30 #include "lwar.h"
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31
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32 void do_add(void)
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33 {
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34 FILE *f;
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35 unsigned char buf[8];
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36 long l;
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37 int c;
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38 FILE *f2;
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39 int i;
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40
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41 f = fopen(archive_file, "rb+");
0
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42 if (!f)
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43 {
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44 if (errno == ENOENT)
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45 {
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46 f = fopen(archive_file, "wb");
0
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47 if (f)
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48 {
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49 fputs("LWAR1V", f);
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50 goto doadd;
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51 }
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52 }
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53 perror("Cannot open archive file");
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54 }
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55
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56 (void)(fread(buf, 1, 6, f) && 1);
0
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57 if (memcmp("LWAR1V", buf, 6))
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58 {
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59 fprintf(stderr, "%s is not a valid archive file.\n", archive_file);
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60 exit(1);
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61 }
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62
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63 for (;;)
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64 {
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65 c = fgetc(f);
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66 if (c == EOF && ferror(f))
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67 {
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68 perror("Reading archive file");
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69 exit(1);
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70 }
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71 if (c == EOF)
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72 goto doadd;
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73
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74 if (!c)
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75 {
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76 fseek(f, -1, SEEK_CUR);
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77 goto doadd;
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78 }
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79
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80 // find the end of the file name
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81 while (c)
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82 {
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83 c = fgetc(f);
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84 if (c == EOF || ferror(f))
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85 {
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86 fprintf(stderr, "Bad archive file\n");
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87 exit(1);
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88 }
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89 }
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90
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91 // get length of archive member
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92 l = 0;
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93 c = fgetc(f);
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94 l = c << 24;
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95 c = fgetc(f);
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96 l |= c << 16;
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97 c = fgetc(f);
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98 l |= c << 8;
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99 c = fgetc(f);
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100 l |= c;
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101
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102 fseek(f, l, SEEK_CUR);
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103 }
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104 // back up to the NUL byte at the end of the file
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105 fseek(f, -1, SEEK_CUR);
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106 doadd:
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107 for (i = 0; i < nfiles; i++)
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108 {
265
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109 f2 = fopen(files[i], "rb");
0
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110 if (!f2)
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111 {
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112 fprintf(stderr, "Cannot open file %s:", files[i]);
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113 perror("");
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114 exit(1);
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115 }
264
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116 (void)(fread(buf, 1, 6, f2) && 1);
0
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117 if (mergeflag && !memcmp("LWAR1V", buf, 6))
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118 {
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119 // add archive contents...
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120 for (;;)
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121 {
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122 c = fgetc(f2);
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123 if (c == EOF || ferror(f2))
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124 {
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125 perror("Reading input archive file");
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126 exit(1);
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127 }
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128 if (c == EOF)
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129 break;
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130
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131 if (!c)
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132 {
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133 break;
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134 }
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135
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136 // find the end of the file name
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137 while (c)
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138 {
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139 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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140 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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141 if (c == EOF || ferror(f))
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142 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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143 fprintf(stderr, "Bad input archive file\n");
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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144 exit(1);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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145 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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146 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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147 fputc(0, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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148
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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149 // get length of archive member
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150 l = 0;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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151 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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152 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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153 l = c << 24;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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154 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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155 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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156 l |= c << 16;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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157 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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158 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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159 l |= c << 8;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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160 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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161 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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162 l |= c;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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163
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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164 while (l)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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165 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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166 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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167 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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168 l--;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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169 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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170 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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171
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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172 fclose(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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173 continue;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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174 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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175 fseek(f2, 0, SEEK_END);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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176 l = ftell(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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177 fseek(f2, 0, SEEK_SET);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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178 fputs(files[i], f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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179 fputc(0, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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180 fputc(l >> 24, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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181 fputc((l >> 16) & 0xff, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 fputc((l >> 8) & 0xff, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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183 fputc(l & 0xff, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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184 while (l)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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185 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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186 c = fgetc(f2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 fputc(c, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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188 l--;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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189 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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190 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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191
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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192 // flag end of file
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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193 fputc(0, f);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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194 }