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monitoring-plugins/plugins/uriparser/UriEscape.c
Andreas Baumann a739a56148 some rework: 
- added old style 'redir' function and options along to a new
  libcurl internal 'follow' parameter 'curl'
- moved picohttpparser to it's own subdirectory
- added uriparser to be used instead of the home-grown parser in
  'redir'
2018-10-22 16:30:31 +02:00

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/*
* uriparser - RFC 3986 URI parsing library
*
* Copyright (C) 2007, Weijia Song <songweijia@gmail.com>
* Copyright (C) 2007, Sebastian Pipping <webmaster@hartwork.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* * Neither the name of the <ORGANIZATION> nor the names of its
* contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* What encodings are enabled? */
#include <uriparser/UriDefsConfig.h>
#if (!defined(URI_PASS_ANSI) && !defined(URI_PASS_UNICODE))
/* Include SELF twice */
# ifdef URI_ENABLE_ANSI
# define URI_PASS_ANSI 1
# include "UriEscape.c"
# undef URI_PASS_ANSI
# endif
# ifdef URI_ENABLE_UNICODE
# define URI_PASS_UNICODE 1
# include "UriEscape.c"
# undef URI_PASS_UNICODE
# endif
#else
# ifdef URI_PASS_ANSI
# include <uriparser/UriDefsAnsi.h>
# else
# include <uriparser/UriDefsUnicode.h>
# include <wchar.h>
# endif
#ifndef URI_DOXYGEN
# include <uriparser/Uri.h>
# include "UriCommon.h"
#endif
URI_CHAR * URI_FUNC(Escape)(const URI_CHAR * in, URI_CHAR * out,
UriBool spaceToPlus, UriBool normalizeBreaks) {
return URI_FUNC(EscapeEx)(in, NULL, out, spaceToPlus, normalizeBreaks);
}
URI_CHAR * URI_FUNC(EscapeEx)(const URI_CHAR * inFirst,
const URI_CHAR * inAfterLast, URI_CHAR * out,
UriBool spaceToPlus, UriBool normalizeBreaks) {
const URI_CHAR * read = inFirst;
URI_CHAR * write = out;
UriBool prevWasCr = URI_FALSE;
if ((out == NULL) || (inFirst == out)) {
return NULL;
} else if (inFirst == NULL) {
if (out != NULL) {
out[0] = _UT('\0');
}
return out;
}
for (;;) {
if ((inAfterLast != NULL) && (read >= inAfterLast)) {
write[0] = _UT('\0');
return write;
}
switch (read[0]) {
case _UT('\0'):
write[0] = _UT('\0');
return write;
case _UT(' '):
if (spaceToPlus) {
write[0] = _UT('+');
write++;
} else {
write[0] = _UT('%');
write[1] = _UT('2');
write[2] = _UT('0');
write += 3;
}
prevWasCr = URI_FALSE;
break;
case _UT('a'): /* ALPHA */
case _UT('A'):
case _UT('b'):
case _UT('B'):
case _UT('c'):
case _UT('C'):
case _UT('d'):
case _UT('D'):
case _UT('e'):
case _UT('E'):
case _UT('f'):
case _UT('F'):
case _UT('g'):
case _UT('G'):
case _UT('h'):
case _UT('H'):
case _UT('i'):
case _UT('I'):
case _UT('j'):
case _UT('J'):
case _UT('k'):
case _UT('K'):
case _UT('l'):
case _UT('L'):
case _UT('m'):
case _UT('M'):
case _UT('n'):
case _UT('N'):
case _UT('o'):
case _UT('O'):
case _UT('p'):
case _UT('P'):
case _UT('q'):
case _UT('Q'):
case _UT('r'):
case _UT('R'):
case _UT('s'):
case _UT('S'):
case _UT('t'):
case _UT('T'):
case _UT('u'):
case _UT('U'):
case _UT('v'):
case _UT('V'):
case _UT('w'):
case _UT('W'):
case _UT('x'):
case _UT('X'):
case _UT('y'):
case _UT('Y'):
case _UT('z'):
case _UT('Z'):
case _UT('0'): /* DIGIT */
case _UT('1'):
case _UT('2'):
case _UT('3'):
case _UT('4'):
case _UT('5'):
case _UT('6'):
case _UT('7'):
case _UT('8'):
case _UT('9'):
case _UT('-'): /* "-" / "." / "_" / "~" */
case _UT('.'):
case _UT('_'):
case _UT('~'):
/* Copy unmodified */
write[0] = read[0];
write++;
prevWasCr = URI_FALSE;
break;
case _UT('\x0a'):
if (normalizeBreaks) {
if (!prevWasCr) {
write[0] = _UT('%');
write[1] = _UT('0');
write[2] = _UT('D');
write[3] = _UT('%');
write[4] = _UT('0');
write[5] = _UT('A');
write += 6;
}
} else {
write[0] = _UT('%');
write[1] = _UT('0');
write[2] = _UT('A');
write += 3;
}
prevWasCr = URI_FALSE;
break;
case _UT('\x0d'):
if (normalizeBreaks) {
write[0] = _UT('%');
write[1] = _UT('0');
write[2] = _UT('D');
write[3] = _UT('%');
write[4] = _UT('0');
write[5] = _UT('A');
write += 6;
} else {
write[0] = _UT('%');
write[1] = _UT('0');
write[2] = _UT('D');
write += 3;
}
prevWasCr = URI_TRUE;
break;
default:
/* Percent encode */
{
const unsigned char code = (unsigned char)read[0];
write[0] = _UT('%');
write[1] = URI_FUNC(HexToLetter)(code >> 4);
write[2] = URI_FUNC(HexToLetter)(code & 0x0f);
write += 3;
}
prevWasCr = URI_FALSE;
break;
}
read++;
}
}
const URI_CHAR * URI_FUNC(UnescapeInPlace)(URI_CHAR * inout) {
return URI_FUNC(UnescapeInPlaceEx)(inout, URI_FALSE, URI_BR_DONT_TOUCH);
}
const URI_CHAR * URI_FUNC(UnescapeInPlaceEx)(URI_CHAR * inout,
UriBool plusToSpace, UriBreakConversion breakConversion) {
URI_CHAR * read = inout;
URI_CHAR * write = inout;
UriBool prevWasCr = URI_FALSE;
if (inout == NULL) {
return NULL;
}
for (;;) {
switch (read[0]) {
case _UT('\0'):
if (read > write) {
write[0] = _UT('\0');
}
return write;
case _UT('%'):
switch (read[1]) {
case _UT('0'):
case _UT('1'):
case _UT('2'):
case _UT('3'):
case _UT('4'):
case _UT('5'):
case _UT('6'):
case _UT('7'):
case _UT('8'):
case _UT('9'):
case _UT('a'):
case _UT('b'):
case _UT('c'):
case _UT('d'):
case _UT('e'):
case _UT('f'):
case _UT('A'):
case _UT('B'):
case _UT('C'):
case _UT('D'):
case _UT('E'):
case _UT('F'):
switch (read[2]) {
case _UT('0'):
case _UT('1'):
case _UT('2'):
case _UT('3'):
case _UT('4'):
case _UT('5'):
case _UT('6'):
case _UT('7'):
case _UT('8'):
case _UT('9'):
case _UT('a'):
case _UT('b'):
case _UT('c'):
case _UT('d'):
case _UT('e'):
case _UT('f'):
case _UT('A'):
case _UT('B'):
case _UT('C'):
case _UT('D'):
case _UT('E'):
case _UT('F'):
{
/* Percent group found */
const unsigned char left = URI_FUNC(HexdigToInt)(read[1]);
const unsigned char right = URI_FUNC(HexdigToInt)(read[2]);
const int code = 16 * left + right;
switch (code) {
case 10:
switch (breakConversion) {
case URI_BR_TO_LF:
if (!prevWasCr) {
write[0] = (URI_CHAR)10;
write++;
}
break;
case URI_BR_TO_CRLF:
if (!prevWasCr) {
write[0] = (URI_CHAR)13;
write[1] = (URI_CHAR)10;
write += 2;
}
break;
case URI_BR_TO_CR:
if (!prevWasCr) {
write[0] = (URI_CHAR)13;
write++;
}
break;
case URI_BR_DONT_TOUCH:
default:
write[0] = (URI_CHAR)10;
write++;
}
prevWasCr = URI_FALSE;
break;
case 13:
switch (breakConversion) {
case URI_BR_TO_LF:
write[0] = (URI_CHAR)10;
write++;
break;
case URI_BR_TO_CRLF:
write[0] = (URI_CHAR)13;
write[1] = (URI_CHAR)10;
write += 2;
break;
case URI_BR_TO_CR:
write[0] = (URI_CHAR)13;
write++;
break;
case URI_BR_DONT_TOUCH:
default:
write[0] = (URI_CHAR)13;
write++;
}
prevWasCr = URI_TRUE;
break;
default:
write[0] = (URI_CHAR)(code);
write++;
prevWasCr = URI_FALSE;
}
read += 3;
}
break;
default:
/* Copy two chars unmodified and */
/* look at this char again */
if (read > write) {
write[0] = read[0];
write[1] = read[1];
}
read += 2;
write += 2;
prevWasCr = URI_FALSE;
}
break;
default:
/* Copy one char unmodified and */
/* look at this char again */
if (read > write) {
write[0] = read[0];
}
read++;
write++;
prevWasCr = URI_FALSE;
}
break;
case _UT('+'):
if (plusToSpace) {
/* Convert '+' to ' ' */
write[0] = _UT(' ');
} else {
/* Copy one char unmodified */
if (read > write) {
write[0] = read[0];
}
}
read++;
write++;
prevWasCr = URI_FALSE;
break;
default:
/* Copy one char unmodified */
if (read > write) {
write[0] = read[0];
}
read++;
write++;
prevWasCr = URI_FALSE;
}
}
}
#endif
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