mirror of
https://github.com/moparisthebest/curl
synced 2024-12-24 17:18:48 -05:00
d0319adb0c
Closes #4547
262 lines
5.8 KiB
C
262 lines
5.8 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "strcase.h"
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/* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
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its behavior is altered by the current locale. */
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char Curl_raw_toupper(char in)
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{
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#if !defined(CURL_DOES_CONVERSIONS)
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if(in >= 'a' && in <= 'z')
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return (char)('A' + in - 'a');
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#else
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switch(in) {
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case 'a':
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return 'A';
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case 'b':
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return 'B';
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case 'c':
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return 'C';
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case 'd':
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return 'D';
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case 'e':
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return 'E';
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case 'f':
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return 'F';
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case 'g':
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return 'G';
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case 'h':
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return 'H';
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case 'i':
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return 'I';
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case 'j':
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return 'J';
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case 'k':
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return 'K';
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case 'l':
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return 'L';
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case 'm':
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return 'M';
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case 'n':
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return 'N';
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case 'o':
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return 'O';
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case 'p':
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return 'P';
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case 'q':
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return 'Q';
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case 'r':
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return 'R';
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case 's':
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return 'S';
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case 't':
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return 'T';
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case 'u':
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return 'U';
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case 'v':
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return 'V';
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case 'w':
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return 'W';
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case 'x':
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return 'X';
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case 'y':
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return 'Y';
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case 'z':
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return 'Z';
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}
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#endif
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return in;
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}
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/* Portable, consistent tolower (remember EBCDIC). Do not use tolower() because
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its behavior is altered by the current locale. */
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char Curl_raw_tolower(char in)
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{
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#if !defined(CURL_DOES_CONVERSIONS)
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if(in >= 'A' && in <= 'Z')
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return (char)('a' + in - 'A');
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#else
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switch(in) {
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case 'A':
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return 'a';
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case 'B':
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return 'b';
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case 'C':
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return 'c';
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case 'D':
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return 'd';
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case 'E':
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return 'e';
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case 'F':
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return 'f';
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case 'G':
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return 'g';
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case 'H':
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return 'h';
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case 'I':
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return 'i';
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case 'J':
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return 'j';
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case 'K':
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return 'k';
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case 'L':
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return 'l';
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case 'M':
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return 'm';
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case 'N':
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return 'n';
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case 'O':
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return 'o';
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case 'P':
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return 'p';
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case 'Q':
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return 'q';
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case 'R':
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return 'r';
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case 'S':
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return 's';
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case 'T':
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return 't';
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case 'U':
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return 'u';
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case 'V':
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return 'v';
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case 'W':
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return 'w';
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case 'X':
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return 'x';
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case 'Y':
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return 'y';
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case 'Z':
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return 'z';
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}
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#endif
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return in;
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}
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/*
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* Curl_strcasecompare() is for doing "raw" case insensitive strings. This is
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* meant to be locale independent and only compare strings we know are safe
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* for this. See
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* https://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for some
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* further explanation to why this function is necessary.
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*
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* The function is capable of comparing a-z case insensitively even for
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* non-ascii.
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*
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* @unittest: 1301
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*/
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int Curl_strcasecompare(const char *first, const char *second)
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{
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while(*first && *second) {
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if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second))
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/* get out of the loop as soon as they don't match */
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break;
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first++;
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second++;
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}
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/* we do the comparison here (possibly again), just to make sure that if the
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loop above is skipped because one of the strings reached zero, we must not
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return this as a successful match */
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return (Curl_raw_toupper(*first) == Curl_raw_toupper(*second));
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}
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int Curl_safe_strcasecompare(const char *first, const char *second)
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{
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if(first && second)
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/* both pointers point to something then compare them */
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return Curl_strcasecompare(first, second);
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/* if both pointers are NULL then treat them as equal */
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return (NULL == first && NULL == second);
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}
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/*
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* @unittest: 1301
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*/
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int Curl_strncasecompare(const char *first, const char *second, size_t max)
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{
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while(*first && *second && max) {
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if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second)) {
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break;
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}
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max--;
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first++;
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second++;
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}
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if(0 == max)
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return 1; /* they are equal this far */
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return Curl_raw_toupper(*first) == Curl_raw_toupper(*second);
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}
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/* Copy an upper case version of the string from src to dest. The
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* strings may overlap. No more than n characters of the string are copied
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* (including any NUL) and the destination string will NOT be
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* NUL-terminated if that limit is reached.
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*/
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void Curl_strntoupper(char *dest, const char *src, size_t n)
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{
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if(n < 1)
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return;
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do {
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*dest++ = Curl_raw_toupper(*src);
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} while(*src++ && --n);
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}
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/* Copy a lower case version of the string from src to dest. The
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* strings may overlap. No more than n characters of the string are copied
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* (including any NUL) and the destination string will NOT be
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* NUL-terminated if that limit is reached.
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*/
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void Curl_strntolower(char *dest, const char *src, size_t n)
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{
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if(n < 1)
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return;
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do {
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*dest++ = Curl_raw_tolower(*src);
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} while(*src++ && --n);
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}
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/* --- public functions --- */
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int curl_strequal(const char *first, const char *second)
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{
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return Curl_strcasecompare(first, second);
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}
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int curl_strnequal(const char *first, const char *second, size_t max)
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{
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return Curl_strncasecompare(first, second, max);
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}
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