1 | /**************************************************************************
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2 | *
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3 | * local_strings -- provides some extra string routines
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4 | * Copyright (C) 1994 Authors
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | **************************************************************************/
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21 |
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22 | #include "sysfuncs.h"
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23 |
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24 | #include "local_strings.h"
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25 | #include "memlib.h"
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26 |
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27 | /* =========================================================================
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28 | * Function: arg_atoi
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29 | * Description:
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30 | * Converts an ascii string to an integer
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31 | * but allows a scale string immediately following.
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32 | * i.e. "10Mb" or "20Kb" or "40Megabytes"
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33 | * There must be no gap between the last digit and the scale.
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34 | * Only the fist letter is significant.
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35 | * K = Kilo
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36 | * M = Mega
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37 | * G = Giga
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38 | * Input:
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39 | * string of form: xxxxxxK or xxxxxxxM or xxxxxxxG
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40 | * where x is a digit
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41 | * Output:
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42 | * a scaled integer
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43 | * ========================================================================= */
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44 |
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45 | #define KILO 1024
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46 | #define MEGA 1024*1024
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47 | #define GIGA 1024*1024*1024
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48 |
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49 | int
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50 | arg_atoi (char *str)
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51 | {
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52 | char *str_ptr = str;
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53 | char ch = '\0';
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54 | long scale = 1;
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55 |
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56 | /* find any scale letter immediately after digits */
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57 | ch = *str_ptr;
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58 | while (!isalpha (ch) && (ch != '\0'))
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59 | ch = *str_ptr++;
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60 |
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61 | /* replace scale letter by end-of-string character */
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62 | *str_ptr = '\0';
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63 |
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64 | /* set scale appropriately */
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65 | switch (ch)
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66 | {
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67 | case 'K':
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68 | scale = KILO;
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69 | break;
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70 | case 'M':
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71 | scale = MEGA;
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72 | break;
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73 | case 'G':
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74 | scale = GIGA;
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75 | break;
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76 | default:
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77 | scale = 1;
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78 | break;
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79 | }
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80 |
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81 | return (atoi (str) * scale);
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82 |
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83 | }
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84 |
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85 | /* ===============================================================================
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86 | * Function: compare
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87 | * Description: Compare two strings.
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88 | * Input: Two binary strings, first byte of string indicates length.
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89 | * Output: Like standard strcmp.
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90 | * = 0 if s1 = s2
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91 | * < 0 if s1 < s2
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92 | * > 0 if s1 > s2
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93 | * =============================================================================== */
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94 | int
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95 | compare (u_char * s1, u_char * s2)
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96 | {
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97 | int l1 = *s1, l2 = *s2;
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98 | int l = (l1 < l2) ? l1 : l2;
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99 |
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100 | while (l--)
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101 | if (*++s1 != *++s2)
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102 | return (*s1 - *s2);
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103 | return (l1 - l2);
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104 |
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105 | }
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106 |
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107 | /*
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108 | * This array is designed for mapping upper and lower case letter
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109 | * together for a case independent comparison. The mappings are
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110 | * based upon ascii character sequences.
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111 | */
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112 | static unsigned char casecharmap[] = {
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113 | '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
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114 | '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
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115 | '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
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116 | '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
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117 | '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
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118 | '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
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119 | '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
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120 | '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
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121 | '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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122 | '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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123 | '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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124 | '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
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125 | '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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126 | '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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127 | '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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128 | '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
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129 | '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
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130 | '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
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131 | '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
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132 | '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
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133 | '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
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134 | '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
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135 | '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
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136 | '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
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137 | '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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138 | '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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139 | '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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140 | '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
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141 | '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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142 | '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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143 | '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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144 | '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
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145 | };
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146 |
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147 | /* ===============================================================================
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148 | * Function: casecompare [RPAP - Jan 97: Stem Index Change]
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149 | * Description: Compare two strings in dictionary order
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150 | * Input: Two binary strings, first byte of string indicates length.
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151 | * Output:
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152 | * = 0 if s1 = s2
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153 | * < 0 if s1 < s2
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154 | * > 0 if s1 > s2
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155 | * =============================================================================== */
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156 | int
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157 | casecompare (u_char * s1, u_char * s2)
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158 | {
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159 | int l1 = *s1, l2 = *s2;
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160 | int l = (l1 < l2) ? l1 : l2;
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161 | int pos = 0;
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162 | register int diff = 0;
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163 |
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164 | while (l--)
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165 | if ((diff = casecharmap[*++s1] - casecharmap[*++s2]) != 0)
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166 | return (diff);
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167 | else if ((diff = *s1 - *s2) != 0)
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168 | if (!pos)
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169 | pos = diff;
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170 |
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171 | return ((l1 - l2) ? (l1 - l2) : (pos));
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172 |
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173 | }
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174 |
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175 | /* =========================================================================
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176 | * Function: copy_string
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177 | * Description:
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178 | * Copies a string with the len in 1st byte
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179 | * Input:
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180 | * Output:
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181 | * ========================================================================= */
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182 |
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183 | u_char *
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184 | copy_string (u_char * src_str)
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185 | {
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186 | u_char *copy = new u_char(src_str[0] + 1);
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187 |
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188 | if (!copy)
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189 | return NULL;
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190 |
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191 | memcpy (copy, src_str, src_str[0] + 1);
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192 | return copy;
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193 |
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194 | }
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195 |
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196 |
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197 | /* ===============================================================================
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198 | * Function: prefixlen
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199 | * Description: Returns length of common prefix string between s1 and s2.
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200 | * Input: two binary strings
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201 | * Output: prefix length
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202 | * =============================================================================== */
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203 | int
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204 | prefixlen (u_char * s1, u_char * s2)
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205 | {
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206 | int l = (*s1 < *s2) ? *s1 : *s2;
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207 | int i = 0;
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208 |
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209 | while (i < l && *++s1 == *++s2)
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210 | ++i;
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211 | return (i);
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212 | }
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213 |
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214 |
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215 | /* ===============================================================================
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216 | * Function: char2str
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217 | * Description:
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218 | * Ensures that non-printable characters are converted to a string
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219 | * which is printable i.e. it indentifies the character.
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220 | * e.g. carriage-return = "\n".
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221 | * Input: character (may be non-printable)
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222 | * Output: pointer to static string
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223 | * =============================================================================== */
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224 |
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225 | char *
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226 | char2str (u_char c)
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227 | {
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228 | static char buf[10];
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229 | switch (c)
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230 | {
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231 | case '\n':
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232 | sprintf (buf, "\\n");
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233 | break;
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234 | case '\b':
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235 | sprintf (buf, "\\b");
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236 | break;
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237 | case '\f':
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238 | sprintf (buf, "\\f");
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239 | break;
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240 | case '\t':
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241 | sprintf (buf, "\\t");
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242 | break;
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243 | default:
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244 | if (c >= ' ' && c <= 126)
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245 | switch (c)
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246 | {
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247 | case '\\':
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248 | sprintf (buf, "\\\\");
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249 | break;
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250 | case '\"':
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251 | sprintf (buf, "\\\"");
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252 | break;
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253 | case '\'':
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254 | sprintf (buf, "\\\'");
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255 | break;
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256 | default:
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257 | buf[0] = c;
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258 | buf[1] = '\0';
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259 | break;
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260 | }
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261 | else
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262 | sprintf (buf, "\\x%02x", c);
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263 | break;
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264 | }
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265 | return buf;
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266 | }
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267 |
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268 | /* ===============================================================================
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269 | * Function: word2str
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270 | * Description:
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271 | * Converts a string with possible non-printable characters into a string
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272 | * consisting entirely of printable characters.
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273 | * Input: string, length stored in first byte
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274 | * Output: pointer to static string
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275 | * =============================================================================== */
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276 |
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277 | char *
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278 | word2str (u_char * s)
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279 | {
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280 | static char buf[1024];
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281 | char *p = buf;
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282 | int i, len = (int) *s++;
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283 |
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284 | memset (buf, '\0', sizeof(buf));
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285 | for (i = 0; i < len; ++i)
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286 | {
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287 | strcpy (p, char2str (s[i]));
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288 | p = strchr (p, '\0');
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289 | }
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290 | return buf;
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291 | }
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292 |
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293 |
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294 | /* =========================================================================
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295 | * Function: de_escape_string
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296 | * Description:
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297 | * Turn a string containing \ escapes into real characters
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298 | * Note this destroys the string s in the process
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299 | * Input: string to de-escape
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300 | * Output: the de-escaped string
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301 | * ========================================================================= */
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302 | char *
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303 | de_escape_string (char *s)
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304 | {
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305 | char *org = s;
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306 | char *d = s;
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307 | while (*s)
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308 | {
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309 | if (*s == '\\')
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310 | {
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311 | ++s;
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312 | switch (*s++)
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313 | {
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314 | case '\0':
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315 | *d++ = '\\';
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316 | --s;
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317 | break;
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318 | case '\\':
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319 | *d++ = '\\';
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320 | break;
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321 | case 'b':
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322 | *d++ = '\b';
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323 | break;
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324 | case 'f':
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325 | *d++ = '\f';
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326 | break;
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327 | case 'n':
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328 | *d++ = '\n';
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329 | break;
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330 | case 'r':
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331 | *d++ = '\r';
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332 | break;
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333 | case 't':
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334 | *d++ = '\r';
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335 | break;
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336 | case '\"':
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337 | *d++ = '\"';
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338 | break;
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339 | case '\'':
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340 | *d++ = '\'';
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341 | break;
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342 | case 'x':
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343 | {
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344 | int num = 0;
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345 | if (isxdigit (*s))
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346 | {
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347 | char ch = toupper (*s++);
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348 | num = ch <= '9' ? ch - '0' : ch - 'A' + 10;
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349 | }
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350 | if (isxdigit (*s))
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351 | {
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352 | char ch = toupper (*s++);
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353 | num = (num << 4) + (ch <= '9' ? ch - '0' : ch - 'A' + 10);
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354 | }
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355 | *d++ = num;
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356 | break;
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357 | }
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358 | case '0':
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359 | case '1':
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360 | case '2':
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361 | case '3':
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362 | case '4':
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363 | case '5':
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364 | case '6':
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365 | case '7':
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366 | {
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367 | int num = *(s - 1) - '0';
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368 | if (*s >= '0' && *s <= '7')
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369 | num = (num << 3) + *s++ - '0';
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370 | if (*s >= '0' && *s <= '7')
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371 | num = (num << 3) + *s++ - '0';
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372 | *d++ = num;
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373 | break;
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374 | }
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375 | }
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376 | }
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377 | else
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378 | *d++ = *s++;
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379 | }
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380 | *d = '\0';
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381 | return (org);
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382 | }
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383 |
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384 | /* =========================================================================
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385 | * Function: str255_to_string
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386 | * Description:
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387 | * Input:
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388 | * Output:
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389 | * ========================================================================= */
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390 |
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391 | char *
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392 | str255_to_string (u_char * str255, char *str)
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393 | {
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394 | static char buf[256];
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395 | char *str_base = NULL;
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396 | int len = *str255++;
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397 | int i = 0;
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398 |
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399 | /* if haven't been given a str to write to then use local buffer */
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400 | if (!str)
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401 | str = &(buf[0]);
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402 |
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403 | str_base = str;
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404 | for (i = 0; i < len; ++i)
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405 | {
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406 | *str++ = *str255++;
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407 | }
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408 | *str = '\0';
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409 |
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410 | return str_base;
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411 | }
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