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14
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1 /*
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2 Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
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3
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4 Permission to use, copy, modify, and distribute this material
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5 for any purpose and without fee is hereby granted, provided
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6 that the above copyright notice and this permission notice
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7 appear in all copies, and that the name of Bellcore not be
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8 used in advertising or publicity pertaining to this
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9 material without the specific, prior written permission
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10 of an authorized representative of Bellcore. BELLCORE
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11 MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY
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12 OF THIS MATERIAL FOR ANY PURPOSE. IT IS PROVIDED "AS IS",
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13 WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
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14 */
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15
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16 #define NEWLINE_CHAR '\n'
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17 #include <stdlib.h>
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18 #include <stdio.h>
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19 #include <ctype.h>
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20 #include <string.h>
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357
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21 #include <errno.h>
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14
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22
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23 static void
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24 output64chunk(int c1, int c2, int c3, int pads, FILE *outfile);
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25
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163
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26 static signed char basis_64[] =
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14
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27 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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28
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163
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29 static signed char index_64[128] = {
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14
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30 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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31 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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32 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
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33 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1,
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34 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
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35 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
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36 -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
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37 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
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38 };
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39
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40 #define char64(c) (((c) < 0 || (c) > 127) ? -1 : index_64[(c)])
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41
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42 /*
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43 char64(c)
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44 char c;
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45 {
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74
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46 char *s = (char *) strchr(basis_64, c);
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14
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47 if (s) return(s-basis_64);
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48 return(-1);
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49 }
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50 */
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51
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52 /* the following gets a character, but fakes it properly into two chars if there's a newline character */
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53 static int InNewline=0;
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54
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55 static int
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363
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56 nextcharin (FILE *infile, int PortableNewlines)
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14
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57 {
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58 int c;
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59
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60 #ifndef NEWLINE_CHAR
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61 return(getc(infile));
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62 #else
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63 if (!PortableNewlines) return(getc(infile));
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64 if (InNewline) {
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65 InNewline = 0;
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66 return(10); /* LF */
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67 }
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68 c = getc(infile);
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69 if (c == NEWLINE_CHAR) {
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70 InNewline = 1;
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71 return(13); /* CR */
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72 }
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73 return(c);
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74 #endif
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75 }
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76
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77 static void
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78 to64(FILE *infile, FILE *outfile, int PortableNewlines)
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79 {
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80 int c1, c2, c3, ct=0;
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81 InNewline = 0; /* always reset it */
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82 while ((c1 = nextcharin(infile, PortableNewlines)) != EOF) {
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83 c2 = nextcharin(infile, PortableNewlines);
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84 if (c2 == EOF) {
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85 output64chunk(c1, 0, 0, 2, outfile);
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86 } else {
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87 c3 = nextcharin(infile, PortableNewlines);
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88 if (c3 == EOF) {
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89 output64chunk(c1, c2, 0, 1, outfile);
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90 } else {
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91 output64chunk(c1, c2, c3, 0, outfile);
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92 }
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93 }
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94 ct += 4;
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95 if (ct > 71) {
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96 putc('\n', outfile);
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97 ct = 0;
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98 }
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99 }
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100 if (ct) putc('\n', outfile);
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101 fflush(outfile);
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102 }
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103
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104 static void
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105 output64chunk(int c1, int c2, int c3, int pads, FILE *outfile)
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106 {
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107 putc(basis_64[c1>>2], outfile);
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108 putc(basis_64[((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4)], outfile);
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109 if (pads == 2) {
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110 putc('=', outfile);
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111 putc('=', outfile);
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112 } else if (pads) {
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113 putc(basis_64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)], outfile);
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114 putc('=', outfile);
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115 } else {
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116 putc(basis_64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)], outfile);
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117 putc(basis_64[c3 & 0x3F], outfile);
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118 }
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119 }
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120
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121 static int
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122 PendingBoundary(char *s, char **Boundaries, int *BoundaryCt)
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123 {
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124 int i, len;
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125
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126 if (s[0] != '-' || s[1] != '-') return(0);
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127
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128
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129 for (i=0; i < *BoundaryCt; ++i) {
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130 len = strlen(Boundaries[i]);
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131 if (!strncmp(s, Boundaries[i], len)) {
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132 if (s[len] == '-' && s[len+1] == '-') *BoundaryCt = i;
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133 return(1);
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134 }
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135 }
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136 return(0);
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137 }
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138
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139 /* If we're in portable newline mode, we have to convert CRLF to the
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140 local newline convention on output */
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141
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142 static int CRpending = 0;
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143
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144 #ifdef NEWLINE_CHAR
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145 static void
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146 almostputc(int c, FILE *outfile, int PortableNewlines)
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147 {
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148 if (CRpending) {
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149 if (c == 10) {
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150 putc(NEWLINE_CHAR, outfile);
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151 CRpending = 0;
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152 } else {
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153 putc(13, outfile);
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154 if (c != 13) {
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155 putc(c, outfile);
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156 CRpending = 0;
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157 }
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158 }
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159 } else {
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160 if (PortableNewlines && c == 13) {
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161 CRpending = 1;
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162 } else {
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163 putc(c, outfile);
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164 }
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165 }
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166 }
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167 #else
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168 static void
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169 almostputc(int c, FILE *outfile, int PortableNewlines)
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170 {
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171 putc(c, outfile);
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172 }
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173 #endif
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174
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175 static void
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176 from64(FILE *infile, FILE *outfile,
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177 char **boundaries, int *boundaryct, int PortableNewlines)
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178 {
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179 int c1, c2, c3, c4;
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180 int newline = 1, DataDone = 0;
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181
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182 /* always reinitialize */
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183 CRpending = 0;
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184 while ((c1 = getc(infile)) != EOF) {
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185 if (isspace(c1)) {
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186 if (c1 == '\n') {
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187 newline = 1;
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188 } else {
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189 newline = 0;
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190 }
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191 continue;
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192 }
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193 if (newline && boundaries && c1 == '-') {
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194 char Buf[200];
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195 /* a dash is NOT base 64, so all bets are off if NOT a boundary */
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196 ungetc(c1, infile);
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197 fgets(Buf, sizeof(Buf), infile);
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198 if (boundaries
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199 && (Buf[0] == '-')
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200 && (Buf[1] == '-')
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201 && PendingBoundary(Buf, boundaries, boundaryct)) {
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202 return;
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203 }
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204 fprintf(stderr, "Ignoring unrecognized boundary line: %s\n", Buf);
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205 continue;
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206 }
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207 if (DataDone) continue;
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208 newline = 0;
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209 do {
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210 c2 = getc(infile);
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211 } while (c2 != EOF && isspace(c2));
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212 do {
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213 c3 = getc(infile);
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214 } while (c3 != EOF && isspace(c3));
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215 do {
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216 c4 = getc(infile);
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217 } while (c4 != EOF && isspace(c4));
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218 if (c2 == EOF || c3 == EOF || c4 == EOF) {
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219 fprintf(stderr, "Warning: base64 decoder saw premature EOF!\n");
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220 return;
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221 }
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222 if (c1 == '=' || c2 == '=') {
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223 DataDone=1;
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224 continue;
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225 }
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226 c1 = char64(c1);
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227 c2 = char64(c2);
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228 almostputc(((c1<<2) | ((c2&0x30)>>4)), outfile, PortableNewlines);
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229 if (c3 == '=') {
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230 DataDone = 1;
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231 } else {
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232 c3 = char64(c3);
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233 almostputc((((c2&0XF) << 4) | ((c3&0x3C) >> 2)), outfile, PortableNewlines);
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234 if (c4 == '=') {
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235 DataDone = 1;
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236 } else {
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237 c4 = char64(c4);
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238 almostputc((((c3&0x03) <<6) | c4), outfile, PortableNewlines);
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239 }
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240 }
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241 }
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242 if (CRpending) putc(13, outfile); /* Don't drop a lone trailing char 13 */
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243 }
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244
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163
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245 static signed char basis_hex[] = "0123456789ABCDEF";
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246 static signed char index_hex[128] = {
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14
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247 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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248 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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249 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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250 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1,
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251 -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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252 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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253 -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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254 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
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255 };
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256
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257 /* The following version generated complaints on Solaris. */
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258 /* #define hexchar(c) (((c) < 0 || (c) > 127) ? -1 : index_hex[(c)]) */
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259 /* Since we're no longer ever calling it with anything signed, this should work: */
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260 #define hexchar(c) (((c) > 127) ? -1 : index_hex[(c)])
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261
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262 /*
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263 hexchar(c)
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264 char c;
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265 {
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266 char *s;
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267 if (islower(c)) c = toupper(c);
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74
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268 s = (char *) strchr(basis_hex, c);
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14
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269 if (s) return(s-basis_hex);
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270 return(-1);
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271 }
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272 */
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273
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274 static void
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275 toqp(FILE *infile, FILE *outfile)
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276 {
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277 int c, ct=0, prevc=255;
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278 while ((c = getc(infile)) != EOF) {
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279 if ((c < 32 && (c != '\n' && c != '\t'))
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280 || (c == '=')
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281 || (c >= 127)
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282 /* Following line is to avoid single periods alone on lines,
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283 which messes up some dumb smtp implementations, sigh... */
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284 || (ct == 0 && c == '.')) {
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285 putc('=', outfile);
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286 putc(basis_hex[c>>4], outfile);
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287 putc(basis_hex[c&0xF], outfile);
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288 ct += 3;
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289 prevc = 'A'; /* close enough */
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290 } else if (c == '\n') {
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291 if (prevc == ' ' || prevc == '\t') {
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292 putc('=', outfile); /* soft & hard lines */
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293 putc(c, outfile);
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294 }
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295 putc(c, outfile);
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296 ct = 0;
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297 prevc = c;
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298 } else {
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299 if (c == 'F' && prevc == '\n') {
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300 /* HORRIBLE but clever hack suggested by MTR for sendmail-avoidance */
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301 c = getc(infile);
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302 if (c == 'r') {
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303 c = getc(infile);
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304 if (c == 'o') {
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305 c = getc(infile);
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306 if (c == 'm') {
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307 c = getc(infile);
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308 if (c == ' ') {
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309 /* This is the case we are looking for */
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310 fputs("=46rom", outfile);
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311 ct += 6;
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312 } else {
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313 fputs("From", outfile);
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314 ct += 4;
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315 }
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316 } else {
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317 fputs("Fro", outfile);
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318 ct += 3;
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319 }
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320 } else {
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321 fputs("Fr", outfile);
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322 ct += 2;
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323 }
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324 } else {
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325 putc('F', outfile);
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326 ++ct;
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327 }
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328 ungetc(c, infile);
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329 prevc = 'x'; /* close enough -- printable */
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330 } else { /* END horrible hack */
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331 putc(c, outfile);
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332 ++ct;
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333 prevc = c;
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334 }
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335 }
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336 if (ct > 72) {
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337 putc('=', outfile);
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338 putc('\n', outfile);
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339 ct = 0;
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340 prevc = '\n';
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341 }
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342 }
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343 if (ct) {
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344 putc('=', outfile);
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345 putc('\n', outfile);
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346 }
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347 }
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348
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349 static void
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350 fromqp(FILE *infile, FILE *outfile, char **boundaries, int *boundaryct)
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351 {
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352 unsigned int c1, c2;
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353 int sawnewline = 1, neednewline = 0;
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354 /* The neednewline hack is necessary because the newline leading into
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355 a multipart boundary is part of the boundary, not the data */
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356
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357 while ((c1 = getc(infile)) != EOF) {
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358 if (sawnewline && boundaries && (c1 == '-')) {
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359 char Buf[200];
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360 unsigned char *s;
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361
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362 ungetc(c1, infile);
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363 fgets(Buf, sizeof(Buf), infile);
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364 if (boundaries
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365 && (Buf[0] == '-')
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366 && (Buf[1] == '-')
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367 && PendingBoundary(Buf, boundaries, boundaryct)) {
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368 return;
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369 }
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370 /* Not a boundary, now we must treat THIS line as q-p, sigh */
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371 if (neednewline) {
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372 putc('\n', outfile);
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373 neednewline = 0;
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374 }
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375 for (s=(unsigned char *) Buf; *s; ++s) {
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376 if (*s == '=') {
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377 if (!*++s) break;
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378 if (*s == '\n') {
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379 /* ignore it */
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380 sawnewline = 1;
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381 } else {
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382 c1 = hexchar(*s);
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383 if (!*++s) break;
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384 c2 = hexchar(*s);
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385 putc(c1<<4 | c2, outfile);
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386 }
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387 } else {
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388 #ifdef MSDOS
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389 if (*s == '\n')
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390 putc('\r', outfile); /* insert CR for binary-mode write */
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391 #endif
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392 putc(*s, outfile);
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393 }
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394 }
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395 } else {
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396 if (neednewline) {
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397 putc('\n', outfile);
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398 neednewline = 0;
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399 }
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400 if (c1 == '=') {
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401 sawnewline = 0;
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402 c1 = getc(infile);
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403 if (c1 == '\n') {
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404 /* ignore it */
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405 sawnewline = 1;
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406 } else {
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407 c2 = getc(infile);
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|
408 c1 = hexchar(c1);
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|
409 c2 = hexchar(c2);
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|
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410 putc(c1<<4 | c2, outfile);
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|
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411 if (c2 == '\n') sawnewline = 1;
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|
|
412 }
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|
|
413 } else {
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|
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414 if (c1 == '\n') {
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|
|
415 sawnewline = 1;
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|
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416 neednewline = 1;
|
|
|
417 } else {
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|
|
418 sawnewline = 0;
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|
|
419 putc(c1, outfile);
|
|
|
420 }
|
|
|
421 }
|
|
|
422 }
|
|
|
423 }
|
|
|
424 if (neednewline) {
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|
|
425 putc('\n', outfile);
|
|
|
426 neednewline = 0;
|
|
|
427 }
|
|
|
428 }
|
|
|
429
|
|
|
430
|
|
|
431 /*
|
|
|
432 Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
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433
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|
|
434 Permission to use, copy, modify, and distribute this material
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|
|
435 for any purpose and without fee is hereby granted, provided
|
|
|
436 that the above copyright notice and this permission notice
|
|
|
437 appear in all copies, and that the name of Bellcore not be
|
|
|
438 used in advertising or publicity pertaining to this
|
|
|
439 material without the specific, prior written permission
|
|
|
440 of an authorized representative of Bellcore. BELLCORE
|
|
|
441 MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY
|
|
|
442 OF THIS MATERIAL FOR ANY PURPOSE. IT IS PROVIDED "AS IS",
|
|
|
443 WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
|
|
|
444 */
|
|
|
445 #ifdef MSDOS
|
|
|
446 #include <fcntl.h>
|
|
|
447 #endif
|
|
|
448
|
|
|
449 #define BASE64 1
|
|
|
450 #define QP 2 /* quoted-printable */
|
|
|
451
|
|
|
452 int main(int argc, char *argv[])
|
|
|
453 {
|
|
|
454 int encode = 1, which = BASE64, i, portablenewlines = 0;
|
|
|
455 FILE *fp = stdin;
|
|
|
456 FILE *fpo = stdout;
|
|
|
457
|
|
|
458 for (i=1; i<argc; ++i) {
|
|
|
459 if (argv[i][0] == '-') {
|
|
|
460 switch (argv[i][1]) {
|
|
|
461 case 'o':
|
|
|
462 if (++i >= argc) {
|
|
|
463 fprintf(stderr, "mimencode: -o requires a file name.\n");
|
|
|
464 exit(-1);
|
|
|
465 }
|
|
|
466 fpo = fopen(argv[i], "w");
|
|
|
467 if (!fpo) {
|
|
|
468 perror(argv[i]);
|
|
|
469 exit(-1);
|
|
|
470 }
|
|
|
471 break;
|
|
|
472 case 'u':
|
|
|
473 encode = 0;
|
|
|
474 break;
|
|
|
475 case 'q':
|
|
|
476 which = QP;
|
|
|
477 break;
|
|
|
478 case 'p':
|
|
|
479 portablenewlines = 1;
|
|
|
480 break;
|
|
|
481 case 'b':
|
|
|
482 which = BASE64;
|
|
|
483 break;
|
|
|
484 default:
|
|
|
485 fprintf(stderr,
|
|
|
486 "Usage: mmencode [-u] [-q] [-b] [-p] [-o outputfile] [file name]\n");
|
|
|
487 exit(-1);
|
|
|
488 }
|
|
|
489 } else {
|
|
|
490 #ifdef MSDOS
|
|
|
491 if (encode)
|
|
|
492 fp = fopen(argv[i], "rb");
|
|
|
493 else
|
|
|
494 {
|
|
|
495 fp = fopen(argv[i], "rt");
|
|
|
496 setmode(fileno(fpo), O_BINARY);
|
|
|
497 } /* else */
|
|
|
498 #else
|
|
|
499 fp = fopen(argv[i], "r");
|
|
|
500 #endif /* MSDOS */
|
|
|
501 if (!fp) {
|
|
|
502 perror(argv[i]);
|
|
|
503 exit(-1);
|
|
|
504 }
|
|
|
505 }
|
|
|
506 }
|
|
|
507 #ifdef MSDOS
|
|
|
508 if (fp == stdin) setmode(fileno(fp), O_BINARY);
|
|
|
509 #endif /* MSDOS */
|
|
|
510 if (which == BASE64) {
|
|
|
511 if (encode) {
|
|
|
512 to64(fp, fpo, portablenewlines);
|
|
|
513 } else {
|
|
|
514 from64(fp,fpo, (char **) NULL, (int *) 0, portablenewlines);
|
|
|
515 }
|
|
|
516 } else {
|
|
|
517 if (encode) toqp(fp, fpo); else fromqp(fp, fpo, NULL, 0);
|
|
|
518 }
|
|
|
519 return(0);
|
|
|
520 }
|
|
|
521
|
