0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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10
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11 u_char *ngx_cpystrn(u_char *dst, u_char *src, size_t n)
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12 {
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13 if (n == 0) {
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14 return dst;
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15 }
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16
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17 for (/* void */; --n; dst++, src++) {
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18 *dst = *src;
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19
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20 if (*dst == '\0') {
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21 return dst;
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22 }
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23 }
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24
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25 *dst = '\0';
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26
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27 return dst;
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28 }
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29
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30
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4
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31 /*
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32 * supported formats:
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10
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33 * %[0][width]O off_t
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34 * %[0][width]T time_t
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35 * %[0][width][u][x|X]z ssize_t/size_t
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36 * %[0][width][u][x|X]d int/u_int
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37 * %[0][width][u][x|X]l long
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38 * %[0][width|m][u][x|X]i ngx_int_t/ngx_uint_t
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39 * %[0][width][u][x|X]D int32_t/uint32_t
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40 * %[0][width][u][x|X]L int64_t/uint64_t
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41 * %P ngx_pid_t
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42 * %r rlim_t
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43 * %p pointer
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44 * %V pointer to ngx_str_t
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45 * %s null-terminated string
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46 * %Z '\0'
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47 * %c char
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48 * %% %
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4
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49 *
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10
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50 * TODO:
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51 * %M ngx_msec_t
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52 * %A ngx_atomic_t
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53 *
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54 * reserved:
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55 * %t ptrdiff_t
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56 * %S null-teminated wchar string
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57 * %C wchar
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4
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58 */
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59
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10
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60
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61 u_char *ngx_sprintf(u_char *buf, const char *fmt, ...)
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62 {
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63 u_char *p;
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64 va_list args;
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65
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66 va_start(args, fmt);
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67 p = ngx_vsnprintf(buf, /* STUB */ 65536, fmt, args);
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68 va_end(args);
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69
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70 return p;
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71 }
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72
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73
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74 u_char *ngx_snprintf(u_char *buf, size_t max, const char *fmt, ...)
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4
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75 {
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10
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76 u_char *p;
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77 va_list args;
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78
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79 va_start(args, fmt);
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80 p = ngx_vsnprintf(buf, max, fmt, args);
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81 va_end(args);
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82
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83 return p;
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84 }
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85
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4
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86
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10
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87 u_char *ngx_vsnprintf(u_char *buf, size_t max, const char *fmt, va_list args)
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88 {
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89 u_char *p, zero, *last, temp[NGX_MAX_INT_LEN];
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90 int d;
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91 size_t len;
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92 uint32_t ui32;
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93 int64_t i64;
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94 uint64_t ui64;
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95 ngx_str_t *s;
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96 ngx_uint_t width, sign, hexadecimal;
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97 static u_char hex[] = "0123456789abcdef";
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98 static u_char HEX[] = "0123456789ABCDEF";
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4
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99
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10
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100 if (max == 0) {
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101 return buf;
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102 }
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103
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104 last = buf + max;
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105
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106 while (*fmt && buf < last) {
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107
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108 /*
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109 * "buf < last" means that we could copy at least one character:
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110 * the plain character, "%%", "%c", and minus without the checking
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111 */
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112
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4
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113 if (*fmt == '%') {
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114
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10
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115 i64 = 0;
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116 ui64 = 0;
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117
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118 zero = (u_char) ((*++fmt == '0') ? '0' : ' ');
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4
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119 width = 0;
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120 sign = 1;
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121 hexadecimal = 0;
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122
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123 p = temp + NGX_MAX_INT_LEN;
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124
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125 while (*fmt >= '0' && *fmt <= '9') {
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126 width = width * 10 + *fmt++ - '0';
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127 }
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128
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129
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130 for ( ;; ) {
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131 switch (*fmt) {
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132
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133 case 'u':
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134 sign = 0;
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135 fmt++;
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136 continue;
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137
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16
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138 case 'm':
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139 width = NGX_INT_T_LEN;
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140 fmt++;
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141 continue;
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142
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10
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143 case 'X':
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144 hexadecimal = 2;
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145 sign = 0;
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146 fmt++;
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147 continue;
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148
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4
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149 case 'x':
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150 hexadecimal = 1;
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10
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151 sign = 0;
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4
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152 fmt++;
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153 continue;
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154
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155 default:
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156 break;
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157 }
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158
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159 break;
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160 }
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161
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162
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163 switch (*fmt) {
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164
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10
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165 case 'V':
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166 s = va_arg(args, ngx_str_t *);
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4
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167
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10
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168 len = (buf + s->len < last) ? s->len : (size_t) (last - buf);
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169 buf = ngx_cpymem(buf, s->data, len);
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170 fmt++;
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4
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171
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10
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172 continue;
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4
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173
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174 case 's':
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10
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175 p = va_arg(args, u_char *);
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4
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176
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10
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177 while (*p && buf < last) {
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4
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178 *buf++ = *p++;
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179 }
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180 fmt++;
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181
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182 continue;
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183
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10
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184 case 'O':
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185 i64 = (int64_t) va_arg(args, off_t);
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186 sign = 1;
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187 break;
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188
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189 case 'P':
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190 i64 = (int64_t) va_arg(args, ngx_pid_t);
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191 sign = 1;
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192 break;
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193
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194 case 'T':
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195 i64 = (int64_t) va_arg(args, time_t);
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196 sign = 1;
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197 break;
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198
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199 case 'z':
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200 if (sign) {
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201 i64 = (int64_t) va_arg(args, ssize_t);
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202 } else {
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203 ui64 = (uint64_t) va_arg(args, size_t);
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204 }
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205 break;
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206
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207 case 'i':
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208 if (sign) {
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209 i64 = (int64_t) va_arg(args, ngx_int_t);
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210 } else {
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211 ui64 = (uint64_t) va_arg(args, ngx_uint_t);
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212 }
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213 break;
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214
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215 case 'd':
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216 if (sign) {
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217 i64 = (int64_t) va_arg(args, int);
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218 } else {
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219 ui64 = (uint64_t) va_arg(args, u_int);
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220 }
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221 break;
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222
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223 case 'l':
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224 if (sign) {
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225 i64 = (int64_t) va_arg(args, long);
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226 } else {
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227 ui64 = (uint64_t) va_arg(args, u_long);
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228 }
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229 break;
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230
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231 case 'D':
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232 if (sign) {
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233 i64 = (int64_t) va_arg(args, int32_t);
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234 } else {
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235 ui64 = (uint64_t) va_arg(args, uint32_t);
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236 }
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237 break;
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238
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239 case 'L':
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240 if (sign) {
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241 i64 = va_arg(args, int64_t);
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242 } else {
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243 ui64 = va_arg(args, uint64_t);
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244 }
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245 break;
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246
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247 #if !(NGX_WIN32)
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248 case 'r':
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249 i64 = (int64_t) va_arg(args, rlim_t);
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250 sign = 1;
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251 break;
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252 #endif
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253
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254 case 'p':
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255 ui64 = (uintptr_t) va_arg(args, void *);
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256 hexadecimal = 2;
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257 sign = 0;
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258 zero = '0';
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259 width = 8;
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260 break;
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261
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6
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262 case 'c':
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10
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263 d = va_arg(args, int);
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6
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264 *buf++ = (u_char) (d & 0xff);
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265 fmt++;
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266
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267 continue;
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268
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10
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269 case 'Z':
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270 *buf++ = '\0';
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271 fmt++;
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272
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273 continue;
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274
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4
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275 case '%':
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276 *buf++ = '%';
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277 fmt++;
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278
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279 continue;
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280
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281 default:
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282 *buf++ = *fmt++;
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283
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284 continue;
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285 }
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286
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10
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287 if (sign) {
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288 if (i64 < 0) {
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289 *buf++ = '-';
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290 ui64 = (uint64_t) -i64;
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291
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292 } else {
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293 ui64 = (uint64_t) i64;
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294 }
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295 }
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296
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297 if (hexadecimal == 1) {
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298 do {
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299
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300 /* the "(uint32_t)" cast disables the BCC's warning */
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301 *--p = hex[(uint32_t) (ui64 & 0xf)];
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302
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303 } while (ui64 >>= 4);
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304
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305 } else if (hexadecimal == 2) {
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306 do {
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307
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308 /* the "(uint32_t)" cast disables the BCC's warning */
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309 *--p = HEX[(uint32_t) (ui64 & 0xf)];
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310
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311 } while (ui64 >>= 4);
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312
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313 } else if (ui64 <= NGX_MAX_UINT32_VALUE) {
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314
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315 /*
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316 * To divide 64-bit number and to find the remainder
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317 * on the x86 platform gcc and icc call the libc functions
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318 * [u]divdi3() and [u]moddi3(), they call another function
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319 * in return. On FreeBSD it is the qdivrem() function,
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320 * its source code is about 170 lines of the code.
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321 * The glibc counterpart is about 150 lines of the code.
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322 *
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323 * For 32-bit numbers gcc and icc use the inlined
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324 * multiplication and shifts. For example, unsigned
|
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325 * "i32 / 10" is compiled to "(i32 * 0xCCCCCCCD) >> 35".
|
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326 */
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327
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328 ui32 = (uint32_t) ui64;
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329
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330 do {
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331 *--p = (u_char) (ui32 % 10 + '0');
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332 } while (ui32 /= 10);
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333
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334 } else {
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335 do {
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336 *--p = (u_char) (ui64 % 10 + '0');
|
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337 } while (ui64 /= 10);
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338 }
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339
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4
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340 len = (temp + NGX_MAX_INT_LEN) - p;
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341
|
10
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342 while (len++ < width && buf < last) {
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343 *buf++ = zero;
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4
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344 }
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345
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10
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346 len = (temp + NGX_MAX_INT_LEN) - p;
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347 if (buf + len > last) {
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348 len = last - buf;
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349 }
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350
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351 buf = ngx_cpymem(buf, p, len);
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4
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352
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353 fmt++;
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354
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355 } else {
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356 *buf++ = *fmt++;
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357 }
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358 }
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359
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360 return buf;
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361 }
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362
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363
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0
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364 ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
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365 {
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366 if (n == 0) {
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367 return 0;
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368 }
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369
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370 n--;
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371
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372 for ( ;; ) {
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373 if (s1[n] != s2[n]) {
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374 return s1[n] - s2[n];
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375 }
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376
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377 if (n == 0) {
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378 return 0;
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379 }
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380
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381 n--;
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382 }
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383 }
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384
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385
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4
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386 ngx_int_t ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n)
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387 {
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388 u_char c1, c2;
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389
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390 if (n == 0) {
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391 return 0;
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392 }
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393
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394 n--;
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395
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396 for ( ;; ) {
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397 c1 = s1[n];
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398 if (c1 >= 'a' && c1 <= 'z') {
|
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399 c1 -= 'a' - 'A';
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400 }
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401
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402 c2 = s2[n];
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403 if (c2 >= 'a' && c2 <= 'z') {
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404 c2 -= 'a' - 'A';
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405 }
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406
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407 if (c1 != c2) {
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408 return c1 - c2;
|
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409 }
|
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410
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411 if (n == 0) {
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412 return 0;
|
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413 }
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414
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415 n--;
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416 }
|
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417 }
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418
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419
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0
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420 ngx_int_t ngx_atoi(u_char *line, size_t n)
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421 {
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422 ngx_int_t value;
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423
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424 if (n == 0) {
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425 return NGX_ERROR;
|
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426 }
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427
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428 for (value = 0; n--; line++) {
|
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429 if (*line < '0' || *line > '9') {
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430 return NGX_ERROR;
|
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431 }
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432
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433 value = value * 10 + (*line - '0');
|
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434 }
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435
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436 if (value < 0) {
|
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437 return NGX_ERROR;
|
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438
|
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439 } else {
|
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440 return value;
|
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441 }
|
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442 }
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443
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444
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445 ngx_int_t ngx_hextoi(u_char *line, size_t n)
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446 {
|
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447 u_char ch;
|
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448 ngx_int_t value;
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449
|
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450 if (n == 0) {
|
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451 return NGX_ERROR;
|
|
452 }
|
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453
|
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454 for (value = 0; n--; line++) {
|
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455 ch = *line;
|
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456
|
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457 if (ch >= '0' && ch <= '9') {
|
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458 value = value * 16 + (ch - '0');
|
|
459 continue;
|
|
460 }
|
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461
|
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462 if (ch >= 'A' && ch <= 'F') {
|
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463 value = value * 16 + (ch - 'A' + 10);
|
|
464 continue;
|
|
465 }
|
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466
|
|
467 if (ch >= 'a' && ch <= 'f') {
|
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468 value = value * 16 + (ch - 'a' + 10);
|
|
469 continue;
|
|
470 }
|
|
471
|
|
472 return NGX_ERROR;
|
|
473 }
|
|
474
|
|
475 if (value < 0) {
|
|
476 return NGX_ERROR;
|
|
477
|
|
478 } else {
|
|
479 return value;
|
|
480 }
|
|
481 }
|
|
482
|
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483
|
|
484 void ngx_md5_text(u_char *text, u_char *md5)
|
|
485 {
|
|
486 int i;
|
|
487 static u_char hex[] = "0123456789abcdef";
|
|
488
|
|
489 for (i = 0; i < 16; i++) {
|
|
490 *text++ = hex[md5[i] >> 4];
|
|
491 *text++ = hex[md5[i] & 0xf];
|
|
492 }
|
|
493
|
|
494 *text = '\0';
|
|
495 }
|
|
496
|
|
497
|
2
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498 void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
|
0
|
499 {
|
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500 u_char *d, *s;
|
|
501 size_t len;
|
|
502 static u_char basis64[] =
|
|
503 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
504
|
|
505 len = src->len;
|
|
506 s = src->data;
|
|
507 d = dst->data;
|
|
508
|
|
509 while (len > 2) {
|
|
510 *d++ = basis64[(s[0] >> 2) & 0x3f];
|
|
511 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
|
|
512 *d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
|
|
513 *d++ = basis64[s[2] & 0x3f];
|
|
514
|
|
515 s += 3;
|
|
516 len -= 3;
|
|
517 }
|
|
518
|
|
519 if (len) {
|
|
520 *d++ = basis64[(s[0] >> 2) & 0x3f];
|
|
521
|
|
522 if (len == 1) {
|
|
523 *d++ = basis64[(s[0] & 3) << 4];
|
|
524 *d++ = '=';
|
|
525
|
|
526 } else {
|
|
527 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
|
|
528 *d++ = basis64[(s[1] & 0x0f) << 2];
|
|
529 }
|
|
530
|
|
531 *d++ = '=';
|
|
532 }
|
|
533
|
|
534 dst->len = d - dst->data;
|
|
535 }
|
|
536
|
|
537
|
2
|
538 ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
|
0
|
539 {
|
|
540 size_t len;
|
|
541 u_char *d, *s;
|
|
542 static u_char basis64[] =
|
|
543 { 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
544 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
545 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
|
|
546 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
|
|
547 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
|
548 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
|
|
549 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
|
550 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
|
|
551
|
|
552 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
553 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
554 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
555 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
556 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
557 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
558 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
559 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77 };
|
|
560
|
|
561 for (len = 0; len < src->len; len++) {
|
|
562 if (src->data[len] == '=') {
|
|
563 break;
|
|
564 }
|
|
565
|
|
566 if (basis64[src->data[len]] == 77) {
|
|
567 return NGX_ERROR;
|
|
568 }
|
|
569 }
|
|
570
|
|
571 if (len % 4 == 1) {
|
|
572 return NGX_ERROR;
|
|
573 }
|
|
574
|
|
575 s = src->data;
|
|
576 d = dst->data;
|
|
577
|
|
578 while (len > 3) {
|
|
579 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
580 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
581 *d++ = (u_char) (basis64[s[2]] << 6 | basis64[s[3]]);
|
|
582
|
|
583 s += 4;
|
|
584 len -= 4;
|
|
585 }
|
|
586
|
|
587 if (len > 1) {
|
|
588 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
589 }
|
|
590
|
|
591 if (len > 2) {
|
|
592 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
593 }
|
|
594
|
|
595 dst->len = d - dst->data;
|
|
596
|
|
597 return NGX_OK;
|
|
598 }
|
|
599
|
|
600
|
10
|
601 ngx_uint_t ngx_escape_uri(u_char *dst, u_char *src, size_t size,
|
|
602 ngx_uint_t type)
|
0
|
603 {
|
10
|
604 ngx_uint_t i, n;
|
|
605 uint32_t *escape;
|
2
|
606 static u_char hex[] = "0123456789abcdef";
|
10
|
607
|
|
608 static uint32_t uri[] =
|
2
|
609 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
0
|
610
|
2
|
611 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
|
|
612 0x80000021, /* 1000 0000 0000 0000 0000 0000 0010 0001 */
|
|
613
|
|
614 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
|
|
615 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
|
|
616
|
|
617 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
|
|
618 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
|
0
|
619
|
2
|
620 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
621 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
622 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
623 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
|
|
624
|
10
|
625 static uint32_t html[] =
|
|
626 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
627
|
|
628 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
|
|
629 0x80000021, /* 0000 0000 0000 0000 0000 0000 1010 0101 */
|
|
630
|
|
631 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
|
|
632 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
|
|
633
|
|
634 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
|
|
635 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
|
|
636
|
|
637 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
638 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
639 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
640 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
|
|
641
|
|
642
|
|
643 if (type == NGX_ESCAPE_HTML) {
|
|
644 escape = html;
|
|
645
|
|
646 } else {
|
|
647 escape = uri;
|
|
648 }
|
|
649
|
2
|
650 if (dst == NULL) {
|
|
651
|
|
652 /* find the number of the characters to be escaped */
|
0
|
653
|
2
|
654 n = 0;
|
|
655
|
|
656 for (i = 0; i < size; i++) {
|
|
657 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
658 n++;
|
|
659 }
|
|
660 src++;
|
|
661 }
|
|
662
|
|
663 return n;
|
0
|
664 }
|
|
665
|
2
|
666 for (i = 0; i < size; i++) {
|
|
667 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
668 *dst++ = '%';
|
|
669 *dst++ = hex[*src >> 4];
|
|
670 *dst++ = hex[*src & 0xf];
|
|
671 src++;
|
0
|
672
|
2
|
673 } else {
|
|
674 *dst++ = *src++;
|
|
675 }
|
0
|
676 }
|
|
677
|
10
|
678 return 0;
|
0
|
679 }
|