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annotate lwar/add.c @ 396:d0c0fede5021

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Update to gcc6809lw patch which may help compilation of some sources Due to persistent random compiler crashes and errors related to "M_REGS", this patch update (4.6.4-2) essentially removes the varius constraints allowing the "soft registers" in most operations. It was causing more problems than it solved and it is not clear that the logic behind those soft registers even makes sense any more. This patch also fixes a bogus comparison related to selecting the right size for a constant. Instead of the excessively clever comparison scheme that was previously in use, the comparisons have been replaced with straight forward comparisions for the top and bottom of the relevant 2's complement ranges.
author William Astle <lost@l-w.ca>
date Mon, 20 Jul 2015 22:32:41 -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
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
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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);
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155 fputc(c, f);
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156 l |= c << 16;
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157 c = fgetc(f2);
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158 fputc(c, f);
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159 l |= c << 8;
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160 c = fgetc(f2);
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161 fputc(c, f);
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162 l |= c;
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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--;
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169 }
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170 }
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171
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172 fclose(f2);
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173 continue;
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174 }
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175 fseek(f2, 0, SEEK_END);
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176 l = ftell(f2);
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177 fseek(f2, 0, SEEK_SET);
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178 fputs(files[i], f);
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179 fputc(0, f);
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180 fputc(l >> 24, f);
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181 fputc((l >> 16) & 0xff, f);
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182 fputc((l >> 8) & 0xff, f);
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183 fputc(l & 0xff, f);
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184 while (l)
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185 {
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186 c = fgetc(f2);
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187 fputc(c, f);
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188 l--;
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189 }
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190 }
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191
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192 // flag end of file
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193 fputc(0, f);
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194 }