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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* These functions are borrowed from libcurl's lib/rawstr.c with minor
* modifications to style and naming. Curl_raw_equal and Curl_raw_nequal are
* further modified to be true cmp style functions, returning negative, zero,
* or positive. */
#include <stdlib.h>
/* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
its behavior is altered by the current locale. */
static char raw_toupper(char in)
{
switch(in) {
case 'a':
return 'A';
case 'b':
return 'B';
case 'c':
return 'C';
case 'd':
return 'D';
case 'e':
return 'E';
case 'f':
return 'F';
case 'g':
return 'G';
case 'h':
return 'H';
case 'i':
return 'I';
case 'j':
return 'J';
case 'k':
return 'K';
case 'l':
return 'L';
case 'm':
return 'M';
case 'n':
return 'N';
case 'o':
return 'O';
case 'p':
return 'P';
case 'q':
return 'Q';
case 'r':
return 'R';
case 's':
return 'S';
case 't':
return 'T';
case 'u':
return 'U';
case 'v':
return 'V';
case 'w':
return 'W';
case 'x':
return 'X';
case 'y':
return 'Y';
case 'z':
return 'Z';
}
return in;
}
/*
* _alpm_raw_cmp() is for doing "raw" case insensitive strings. This is meant
* to be locale independent and only compare strings we know are safe for
* this. See http://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for
* some further explanation to why this function is necessary.
*
* The function is capable of comparing a-z case insensitively even for
* non-ascii.
*/
int _alpm_raw_cmp(const char *first, const char *second)
{
while(*first && *second) {
if(raw_toupper(*first) != raw_toupper(*second)) {
/* get out of the loop as soon as they don't match */
break;
}
first++;
second++;
}
/* we do the comparison here (possibly again), just to make sure that if the
loop above is skipped because one of the strings reached zero, we must not
return this as a successful match */
return (raw_toupper(*first) - raw_toupper(*second));
}
int _alpm_raw_ncmp(const char *first, const char *second, size_t max)
{
while(*first && *second && max) {
if(raw_toupper(*first) != raw_toupper(*second)) {
break;
}
max--;
first++;
second++;
}
if(0 == max) {
/* they are equal this far */
return 0;
}
return (raw_toupper(*first) - raw_toupper(*second));
}
/* vim: set ts=2 sw=2 noet: */
|