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annotate lwar/add.c @ 0:2c24602be78f

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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
author lost@l-w.ca
date Wed, 19 Jan 2011 22:27:17 -0700
parents
children 7317fbe024af
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0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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5 This file is part of LWAR.
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6
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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9 Foundation, either version 3 of the License, or (at your option) any later
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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17 You should have received a copy of the GNU General Public License along with
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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18 this program. If not, see <http://www.gnu.org/licenses/>.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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19
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20
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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>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28
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29 #include "lwar.h"
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30
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31 void do_add(void)
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32 {
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33 FILE *f;
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34 unsigned char buf[8];
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35 long l;
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36 int c;
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37 FILE *f2;
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38 int i;
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39
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40 f = fopen(archive_file, "r+");
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41 if (!f)
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42 {
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43 if (errno == ENOENT)
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44 {
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45 f = fopen(archive_file, "w");
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46 if (f)
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47 {
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48 fputs("LWAR1V", f);
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49 goto doadd;
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50 }
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51 }
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52 perror("Cannot open archive file");
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53 }
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54
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55 fread(buf, 1, 6, f);
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56 if (memcmp("LWAR1V", buf, 6))
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57 {
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58 fprintf(stderr, "%s is not a valid archive file.\n", archive_file);
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59 exit(1);
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60 }
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61
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62 for (;;)
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63 {
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64 c = fgetc(f);
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65 if (c == EOF && ferror(f))
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66 {
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67 perror("Reading archive file");
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68 exit(1);
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69 }
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70 if (c == EOF)
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71 goto doadd;
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72
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73 if (!c)
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74 {
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75 fseek(f, -1, SEEK_CUR);
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76 goto doadd;
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77 }
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78
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79 // find the end of the file name
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80 while (c)
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81 {
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82 c = fgetc(f);
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83 if (c == EOF || ferror(f))
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84 {
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85 fprintf(stderr, "Bad archive file\n");
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86 exit(1);
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87 }
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88 }
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89
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90 // get length of archive member
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91 l = 0;
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92 c = fgetc(f);
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93 l = c << 24;
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94 c = fgetc(f);
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95 l |= c << 16;
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96 c = fgetc(f);
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97 l |= c << 8;
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98 c = fgetc(f);
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99 l |= c;
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100
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101 fseek(f, l, SEEK_CUR);
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102 }
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103 // back up to the NUL byte at the end of the file
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104 fseek(f, -1, SEEK_CUR);
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105 doadd:
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106 for (i = 0; i < nfiles; i++)
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107 {
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108 f2 = fopen(files[i], "r");
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109 if (!f2)
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110 {
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111 fprintf(stderr, "Cannot open file %s:", files[i]);
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112 perror("");
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113 exit(1);
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114 }
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115 fread(buf, 1, 6, f2);
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116 if (mergeflag && !memcmp("LWAR1V", buf, 6))
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117 {
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118 // add archive contents...
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119 for (;;)
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120 {
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121 c = fgetc(f2);
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122 if (c == EOF || ferror(f2))
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123 {
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124 perror("Reading input archive file");
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125 exit(1);
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126 }
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127 if (c == EOF)
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128 break;
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129
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130 if (!c)
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131 {
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132 break;
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133 }
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134
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135 // find the end of the file name
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136 while (c)
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137 {
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138 fputc(c, f);
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139 c = fgetc(f2);
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140 if (c == EOF || ferror(f))
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141 {
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142 fprintf(stderr, "Bad input archive file\n");
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143 exit(1);
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144 }
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145 }
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146 fputc(0, f);
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147
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148 // get length of archive member
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149 l = 0;
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150 c = fgetc(f2);
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151 fputc(c, f);
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152 l = c << 24;
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153 c = fgetc(f2);
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154 fputc(c, f);
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155 l |= c << 16;
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156 c = fgetc(f2);
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157 fputc(c, f);
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158 l |= c << 8;
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159 c = fgetc(f2);
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160 fputc(c, f);
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161 l |= c;
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162
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163 while (l)
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164 {
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165 c = fgetc(f2);
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166 fputc(c, f);
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167 l--;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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168 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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169 }
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170
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171 fclose(f2);
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172 continue;
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173 }
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174 fseek(f2, 0, SEEK_END);
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175 l = ftell(f2);
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176 fseek(f2, 0, SEEK_SET);
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177 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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178 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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179 fputc(l >> 24, f);
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180 fputc((l >> 16) & 0xff, f);
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181 fputc((l >> 8) & 0xff, f);
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182 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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183 while (l)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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184 {
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185 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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186 fputc(c, f);
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187 l--;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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188 }
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189 }
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190
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191 // flag end of file
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192 fputc(0, f);
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193 }