[164] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #include "rawstr.h"
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| 26 |
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| 27 | /* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
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| 28 | its behavior is altered by the current locale. */
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| 29 | char Curl_raw_toupper(char in)
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| 30 | {
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| 31 | #if !defined(CURL_DOES_CONVERSIONS)
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| 32 | if(in >= 'a' && in <= 'z')
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| 33 | return (char)('A' + in - 'a');
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| 34 | #else
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| 35 | switch (in) {
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| 36 | case 'a':
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| 37 | return 'A';
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| 38 | case 'b':
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| 39 | return 'B';
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| 40 | case 'c':
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| 41 | return 'C';
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| 42 | case 'd':
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| 43 | return 'D';
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| 44 | case 'e':
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| 45 | return 'E';
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| 46 | case 'f':
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| 47 | return 'F';
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| 48 | case 'g':
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| 49 | return 'G';
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| 50 | case 'h':
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| 51 | return 'H';
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| 52 | case 'i':
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| 53 | return 'I';
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| 54 | case 'j':
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| 55 | return 'J';
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| 56 | case 'k':
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| 57 | return 'K';
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| 58 | case 'l':
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| 59 | return 'L';
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| 60 | case 'm':
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| 61 | return 'M';
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| 62 | case 'n':
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| 63 | return 'N';
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| 64 | case 'o':
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| 65 | return 'O';
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| 66 | case 'p':
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| 67 | return 'P';
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| 68 | case 'q':
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| 69 | return 'Q';
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| 70 | case 'r':
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| 71 | return 'R';
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| 72 | case 's':
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| 73 | return 'S';
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| 74 | case 't':
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| 75 | return 'T';
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| 76 | case 'u':
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| 77 | return 'U';
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| 78 | case 'v':
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| 79 | return 'V';
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| 80 | case 'w':
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| 81 | return 'W';
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| 82 | case 'x':
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| 83 | return 'X';
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| 84 | case 'y':
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| 85 | return 'Y';
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| 86 | case 'z':
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| 87 | return 'Z';
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| 88 | }
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| 89 | #endif
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| 90 |
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| 91 | return in;
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| 92 | }
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| 93 |
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| 94 | /*
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| 95 | * Curl_raw_equal() is for doing "raw" case insensitive strings. This is meant
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| 96 | * to be locale independent and only compare strings we know are safe for
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| 97 | * this. See https://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for
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| 98 | * some further explanation to why this function is necessary.
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| 99 | *
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| 100 | * The function is capable of comparing a-z case insensitively even for
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| 101 | * non-ascii.
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| 102 | */
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| 103 |
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| 104 | int Curl_raw_equal(const char *first, const char *second)
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| 105 | {
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| 106 | while(*first && *second) {
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| 107 | if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second))
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| 108 | /* get out of the loop as soon as they don't match */
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| 109 | break;
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| 110 | first++;
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| 111 | second++;
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| 112 | }
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| 113 | /* we do the comparison here (possibly again), just to make sure that if the
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| 114 | loop above is skipped because one of the strings reached zero, we must not
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| 115 | return this as a successful match */
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| 116 | return (Curl_raw_toupper(*first) == Curl_raw_toupper(*second));
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| 117 | }
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| 118 |
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| 119 | int Curl_raw_nequal(const char *first, const char *second, size_t max)
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| 120 | {
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| 121 | while(*first && *second && max) {
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| 122 | if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second)) {
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| 123 | break;
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| 124 | }
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| 125 | max--;
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| 126 | first++;
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| 127 | second++;
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| 128 | }
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| 129 | if(0 == max)
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| 130 | return 1; /* they are equal this far */
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| 131 |
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| 132 | return Curl_raw_toupper(*first) == Curl_raw_toupper(*second);
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| 133 | }
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| 134 |
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| 135 | /* Copy an upper case version of the string from src to dest. The
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| 136 | * strings may overlap. No more than n characters of the string are copied
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| 137 | * (including any NUL) and the destination string will NOT be
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| 138 | * NUL-terminated if that limit is reached.
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| 139 | */
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| 140 | void Curl_strntoupper(char *dest, const char *src, size_t n)
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| 141 | {
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| 142 | if(n < 1)
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| 143 | return;
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| 144 |
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| 145 | do {
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| 146 | *dest++ = Curl_raw_toupper(*src);
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| 147 | } while(*src++ && --n);
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| 148 | }
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