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annotate lwar/add.c @ 425:9f0448022f1f

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Fix address overflows in SREC and IHEX file formats Thanks to hider <stego@satx.rr.com> for pointing out an overflow that caused 16 bit addresses to be output as 5 hex digits in cases where an address counter wrapped. Simply mask the addresses down to 16 bits.
author William Astle <lost@l-w.ca>
date Thu, 03 Nov 2016 21:36:17 -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);
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140 c = fgetc(f2);
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141 if (c == EOF || ferror(f))
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142 {
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143 fprintf(stderr, "Bad input archive file\n");
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144 exit(1);
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145 }
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146 }
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147 fputc(0, f);
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148
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149 // get length of archive member
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150 l = 0;
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151 c = fgetc(f2);
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152 fputc(c, f);
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153 l = c << 24;
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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
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164 while (l)
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165 {
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166 c = fgetc(f2);
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167 fputc(c, f);
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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
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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
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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 }