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-rw-r--r--sal/rtl/uri.cxx759
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diff --git a/sal/rtl/uri.cxx b/sal/rtl/uri.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <rtl/character.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/textenc.h>
+#include <rtl/textcvt.h>
+#include <rtl/uri.h>
+#include <rtl/uri.hxx>
+#include <rtl/ustrbuf.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.h>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <sal/macros.h>
+
+#include <uri_internal.hxx>
+
+#include <algorithm>
+#include <cstddef>
+
+namespace {
+
+sal_Unicode const cEscapePrefix = 0x25; // '%'
+
+int getHexWeight(sal_uInt32 nUtf32)
+{
+ return nUtf32 >= 0x30 && nUtf32 <= 0x39 ? // '0'--'9'
+ static_cast< int >(nUtf32 - 0x30) :
+ nUtf32 >= 0x41 && nUtf32 <= 0x46 ? // 'A'--'F'
+ static_cast< int >(nUtf32 - 0x41 + 10) :
+ nUtf32 >= 0x61 && nUtf32 <= 0x66 ? // 'a'--'f'
+ static_cast< int >(nUtf32 - 0x61 + 10) :
+ -1; // not a hex digit
+}
+
+bool isValid(sal_Bool const * pCharClass, sal_uInt32 nUtf32)
+{
+ return nUtf32 < rtl::UriCharClassSize && pCharClass[nUtf32];
+}
+
+void writeUnicode(rtl_uString ** pBuffer, sal_Int32 * pCapacity,
+ sal_Unicode cChar)
+{
+ rtl_uStringbuffer_insert(pBuffer, pCapacity, (*pBuffer)->length, &cChar, 1);
+}
+
+}
+
+namespace rtl::uri::detail {
+
+/** Read any of the following:
+
+ @li sequence of escape sequences representing character from eCharset,
+ translated to single UCS4 character; or
+ @li pair of UTF-16 surrogates, translated to single UCS4 character; or
+ @li single UTF-16 character, extended to UCS4 character.
+ */
+sal_uInt32 readUcs4(sal_Unicode const ** pBegin, sal_Unicode const * pEnd,
+ bool bEncoded, rtl_TextEncoding eCharset,
+ EscapeType * pType)
+{
+ sal_uInt32 nChar = *(*pBegin)++;
+ int nWeight1;
+ int nWeight2;
+ if (nChar == cEscapePrefix && bEncoded && pEnd - *pBegin >= 2
+ && (nWeight1 = getHexWeight((*pBegin)[0])) >= 0
+ && (nWeight2 = getHexWeight((*pBegin)[1])) >= 0)
+ {
+ *pBegin += 2;
+ nChar = static_cast< sal_uInt32 >(nWeight1 << 4 | nWeight2);
+ if (nChar <= 0x7F)
+ {
+ *pType = EscapeChar;
+ }
+ else if (eCharset == RTL_TEXTENCODING_UTF8)
+ {
+ if (nChar >= 0xC0 && nChar <= 0xF4)
+ {
+ sal_uInt32 nEncoded;
+ int nShift;
+ sal_uInt32 nMin;
+ if (nChar <= 0xDF)
+ {
+ nEncoded = (nChar & 0x1F) << 6;
+ nShift = 0;
+ nMin = 0x80;
+ }
+ else if (nChar <= 0xEF)
+ {
+ nEncoded = (nChar & 0x0F) << 12;
+ nShift = 6;
+ nMin = 0x800;
+ }
+ else
+ {
+ nEncoded = (nChar & 0x07) << 18;
+ nShift = 12;
+ nMin = 0x10000;
+ }
+
+ sal_Unicode const * p = *pBegin;
+ bool bUTF8 = true;
+
+ for (; nShift >= 0; nShift -= 6)
+ {
+ if (pEnd - p < 3 || p[0] != cEscapePrefix
+ || (nWeight1 = getHexWeight(p[1])) < 8
+ || nWeight1 > 11
+ || (nWeight2 = getHexWeight(p[2])) < 0)
+ {
+ bUTF8 = false;
+ break;
+ }
+ p += 3;
+ nEncoded |= ((nWeight1 & 3) << 4 | nWeight2) << nShift;
+ }
+ if (bUTF8 && rtl::isUnicodeScalarValue(nEncoded)
+ && nEncoded >= nMin)
+ {
+ *pBegin = p;
+ *pType = EscapeChar;
+ return nEncoded;
+ }
+ }
+ *pType = EscapeOctet;
+ }
+ else
+ {
+ OStringBuffer aBuf;
+ aBuf.append(static_cast< char >(nChar));
+ rtl_TextToUnicodeConverter aConverter
+ = rtl_createTextToUnicodeConverter(eCharset);
+ sal_Unicode const * p = *pBegin;
+
+ for (;;)
+ {
+ sal_Unicode aDst[2];
+ sal_uInt32 nInfo;
+ sal_Size nConverted;
+ sal_Size nDstSize = rtl_convertTextToUnicode(
+ aConverter, nullptr, aBuf.getStr(), aBuf.getLength(), aDst,
+ SAL_N_ELEMENTS( aDst ),
+ (RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR
+ | RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR
+ | RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR),
+ &nInfo, &nConverted);
+
+ if (nInfo == 0)
+ {
+ assert( nConverted
+ == sal::static_int_cast< sal_uInt32 >(
+ aBuf.getLength()));
+
+ rtl_destroyTextToUnicodeConverter(aConverter);
+ *pBegin = p;
+ *pType = EscapeChar;
+
+ assert( nDstSize == 1
+ || (nDstSize == 2 && rtl::isHighSurrogate(aDst[0])
+ && rtl::isLowSurrogate(aDst[1])));
+
+ return nDstSize == 1
+ ? aDst[0] : rtl::combineSurrogates(aDst[0], aDst[1]);
+ }
+ if (nInfo == RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOOSMALL
+ && pEnd - p >= 3 && p[0] == cEscapePrefix
+ && (nWeight1 = getHexWeight(p[1])) >= 0
+ && (nWeight2 = getHexWeight(p[2])) >= 0)
+ {
+ p += 3;
+ aBuf.append(static_cast< char >(nWeight1 << 4 | nWeight2));
+ }
+ else if (nInfo == RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOOSMALL
+ && p != pEnd && *p <= 0x7F)
+ {
+ aBuf.append(static_cast< char >(*p++));
+ }
+ else
+ {
+ assert(
+ (nInfo & RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL)
+ == 0);
+ break;
+ }
+ }
+ rtl_destroyTextToUnicodeConverter(aConverter);
+ *pType = EscapeOctet;
+ }
+ return nChar;
+ }
+
+ *pType = EscapeNo;
+ return rtl::isHighSurrogate(nChar) && *pBegin < pEnd
+ && rtl::isLowSurrogate(**pBegin) ?
+ rtl::combineSurrogates(nChar, *(*pBegin)++) : nChar;
+}
+
+}
+
+namespace {
+
+void writeUcs4(rtl_uString ** pBuffer, sal_Int32 * pCapacity, sal_uInt32 nUtf32)
+{
+ rtl_uStringbuffer_insertUtf32(pBuffer, pCapacity, (*pBuffer)->length, nUtf32);
+}
+
+void writeEscapeOctet(rtl_uString ** pBuffer, sal_Int32 * pCapacity,
+ sal_uInt32 nOctet)
+{
+ assert(nOctet <= 0xFF); // bad octet
+
+ static sal_Unicode const aHex[16]
+ = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+ 0x41, 0x42, 0x43, 0x44, 0x45, 0x46 }; /* '0'--'9', 'A'--'F' */
+
+ writeUnicode(pBuffer, pCapacity, cEscapePrefix);
+ writeUnicode(pBuffer, pCapacity, aHex[nOctet >> 4]);
+ writeUnicode(pBuffer, pCapacity, aHex[nOctet & 15]);
+}
+
+bool writeEscapeChar(rtl_uString ** pBuffer, sal_Int32 * pCapacity,
+ sal_uInt32 nUtf32, rtl_TextEncoding eCharset, bool bStrict)
+{
+ assert(rtl::isUnicodeCodePoint(nUtf32));
+ if (eCharset == RTL_TEXTENCODING_UTF8)
+ {
+ if (nUtf32 < 0x80)
+ {
+ writeEscapeOctet(pBuffer, pCapacity, nUtf32);
+ }
+ else if (nUtf32 < 0x800)
+ {
+ writeEscapeOctet(pBuffer, pCapacity, nUtf32 >> 6 | 0xC0);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 & 0x3F) | 0x80);
+ }
+ else if (nUtf32 < 0x10000)
+ {
+ writeEscapeOctet(pBuffer, pCapacity, nUtf32 >> 12 | 0xE0);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 >> 6 & 0x3F) | 0x80);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 & 0x3F) | 0x80);
+ }
+ else
+ {
+ writeEscapeOctet(pBuffer, pCapacity, nUtf32 >> 18 | 0xF0);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 >> 12 & 0x3F) | 0x80);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 >> 6 & 0x3F) | 0x80);
+ writeEscapeOctet(pBuffer, pCapacity, (nUtf32 & 0x3F) | 0x80);
+ }
+ }
+ else
+ {
+ rtl_UnicodeToTextConverter aConverter
+ = rtl_createUnicodeToTextConverter(eCharset);
+ sal_Unicode aSrc[2];
+ sal_Size nSrcSize = rtl::splitSurrogates(nUtf32, aSrc);
+
+ char aDst[32]; // FIXME random value
+ sal_uInt32 nInfo;
+ sal_Size nConverted;
+ sal_Size nDstSize = rtl_convertUnicodeToText(
+ aConverter, nullptr, aSrc, nSrcSize, aDst, sizeof aDst,
+ RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR
+ | RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR
+ | RTL_UNICODETOTEXT_FLAGS_FLUSH,
+ &nInfo, &nConverted);
+ assert((nInfo & RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL) == 0);
+ rtl_destroyUnicodeToTextConverter(aConverter);
+
+ if (nInfo == 0)
+ {
+ assert(nConverted == nSrcSize); // bad rtl_convertUnicodeToText
+
+ for (sal_Size i = 0; i < nDstSize; ++i)
+ {
+ writeEscapeOctet(pBuffer, pCapacity,
+ static_cast< unsigned char >(aDst[i]));
+ // FIXME all octets are escaped, even if there is no need
+ }
+ }
+ else
+ {
+ if (bStrict)
+ return false;
+
+ writeUcs4(pBuffer, pCapacity, nUtf32);
+ }
+ }
+ return true;
+}
+
+struct Component
+{
+ sal_Unicode const * pBegin;
+ sal_Unicode const * pEnd;
+
+ Component(): pBegin(nullptr), pEnd(nullptr) {}
+
+ bool isPresent() const { return pBegin != nullptr; }
+
+ sal_Int32 getLength() const;
+};
+
+sal_Int32 Component::getLength() const
+{
+ assert(isPresent()); // taking length of non-present component
+ return static_cast< sal_Int32 >(pEnd - pBegin);
+}
+
+struct Components
+{
+ Component aScheme;
+ Component aAuthority;
+ Component aPath;
+ Component aQuery;
+ Component aFragment;
+};
+
+void parseUriRef(rtl_uString const * pUriRef, Components * pComponents)
+{
+ // This algorithm is liberal and accepts various forms of illegal input.
+
+ sal_Unicode const * pBegin = pUriRef->buffer;
+ sal_Unicode const * pEnd = pBegin + pUriRef->length;
+ sal_Unicode const * pPos = pBegin;
+
+ if (pPos != pEnd && rtl::isAsciiAlpha(*pPos))
+ {
+ for (sal_Unicode const * p = pPos + 1; p != pEnd; ++p)
+ {
+ if (*p == ':')
+ {
+ pComponents->aScheme.pBegin = pBegin;
+ pComponents->aScheme.pEnd = ++p;
+ pPos = p;
+ break;
+ }
+
+ if (!rtl::isAsciiAlphanumeric(*p) && *p != '+' && *p != '-'
+ && *p != '.')
+ {
+ break;
+ }
+ }
+ }
+
+ if (pEnd - pPos >= 2 && pPos[0] == '/' && pPos[1] == '/')
+ {
+ pComponents->aAuthority.pBegin = pPos;
+ pPos += 2;
+ while (pPos != pEnd && *pPos != '/' && *pPos != '?' && *pPos != '#')
+ {
+ ++pPos;
+ }
+
+ pComponents->aAuthority.pEnd = pPos;
+ }
+
+ pComponents->aPath.pBegin = pPos;
+ while (pPos != pEnd && *pPos != '?' && * pPos != '#')
+ {
+ ++pPos;
+ }
+
+ pComponents->aPath.pEnd = pPos;
+
+ if (pPos != pEnd && *pPos == '?')
+ {
+ pComponents->aQuery.pBegin = pPos++;
+ while (pPos != pEnd && * pPos != '#')
+ {
+ ++pPos;
+ }
+
+ pComponents->aQuery.pEnd = pPos;
+ }
+
+ if (pPos != pEnd)
+ {
+ assert(*pPos == '#');
+ pComponents->aFragment.pBegin = pPos;
+ pComponents->aFragment.pEnd = pEnd;
+ }
+}
+
+void appendPath(
+ OUStringBuffer & buffer, sal_Int32 bufferStart, bool precedingSlash,
+ sal_Unicode const * pathBegin, sal_Unicode const * pathEnd)
+{
+ while (precedingSlash || pathBegin != pathEnd)
+ {
+ sal_Unicode const * p = pathBegin;
+ while (p != pathEnd && *p != '/')
+ {
+ ++p;
+ }
+
+ std::size_t n = p - pathBegin;
+ if (n == 1 && pathBegin[0] == '.')
+ {
+ // input begins with "." -> remove from input (and done):
+ // i.e., !precedingSlash -> !precedingSlash
+ // input begins with "./" -> remove from input:
+ // i.e., !precedingSlash -> !precedingSlash
+ // input begins with "/." -> replace with "/" in input (and not yet
+ // done):
+ // i.e., precedingSlash -> precedingSlash
+ // input begins with "/./" -> replace with "/" in input:
+ // i.e., precedingSlash -> precedingSlash
+ }
+ else if (n == 2 && pathBegin[0] == '.' && pathBegin[1] == '.')
+ {
+ // input begins with ".." -> remove from input (and done):
+ // i.e., !precedingSlash -> !precedingSlash
+ // input begins with "../" -> remove from input
+ // i.e., !precedingSlash -> !precedingSlash
+ // input begins with "/.." -> replace with "/" in input, and shrink
+ // output (not yet done):
+ // i.e., precedingSlash -> precedingSlash
+ // input begins with "/../" -> replace with "/" in input, and shrink
+ // output:
+ // i.e., precedingSlash -> precedingSlash
+ if (precedingSlash)
+ {
+ buffer.truncate(
+ bufferStart
+ + std::max<sal_Int32>(
+ rtl_ustr_lastIndexOfChar_WithLength(
+ buffer.getStr() + bufferStart,
+ buffer.getLength() - bufferStart, '/'),
+ 0));
+ }
+ }
+ else
+ {
+ if (precedingSlash)
+ buffer.append('/');
+
+ buffer.append(pathBegin, n);
+ precedingSlash = p != pathEnd;
+ }
+ pathBegin = p + (p == pathEnd ? 0 : 1);
+ }
+}
+
+}
+
+sal_Bool const * SAL_CALL rtl_getUriCharClass(rtl_UriCharClass eCharClass)
+ SAL_THROW_EXTERN_C()
+{
+ static constexpr std::array<sal_Bool, rtl::UriCharClassSize> aCharClass[] = {
+ rtl::createUriCharClass(u8""), // None
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-./:;=?@[]_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // Uric
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-.:;=?@_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // UricNoSlash
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-.;=@_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // RelSegment
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-.:;=@_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // RegName
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-.:;=_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // Userinfo
+ rtl::createUriCharClass(
+ u8"!$&'()*+,-.:=@_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), // Pchar
+ rtl::createUriCharClass(
+ u8"!$&'()*+-./:?@_~"
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")}; // UnoParamValue
+
+ assert(
+ (eCharClass >= 0
+ && (sal::static_int_cast< std::size_t >(eCharClass)
+ < SAL_N_ELEMENTS(aCharClass)))); // bad eCharClass
+ return aCharClass[eCharClass].data();
+}
+
+void SAL_CALL rtl_uriEncode(rtl_uString * pText, sal_Bool const * pCharClass,
+ rtl_UriEncodeMechanism eMechanism,
+ rtl_TextEncoding eCharset, rtl_uString ** pResult)
+ SAL_THROW_EXTERN_C()
+{
+ assert(!pCharClass[0x25]); // make sure the percent sign is encoded...
+
+ sal_Unicode const * p = pText->buffer;
+ sal_Unicode const * pEnd = p + pText->length;
+ sal_Int32 nCapacity = 256;
+ rtl_uString_new_WithLength(pResult, nCapacity);
+
+ while (p < pEnd)
+ {
+ rtl::uri::detail::EscapeType eType;
+ sal_uInt32 nUtf32 = rtl::uri::detail::readUcs4(
+ &p, pEnd,
+ (eMechanism == rtl_UriEncodeKeepEscapes
+ || eMechanism == rtl_UriEncodeCheckEscapes
+ || eMechanism == rtl_UriEncodeStrictKeepEscapes),
+ eCharset, &eType);
+
+ switch (eType)
+ {
+ case rtl::uri::detail::EscapeNo:
+ if (isValid(pCharClass, nUtf32)) // implies nUtf32 <= 0x7F
+ {
+ writeUnicode(pResult, &nCapacity,
+ static_cast< sal_Unicode >(nUtf32));
+ }
+ else if (!writeEscapeChar(
+ pResult, &nCapacity, nUtf32, eCharset,
+ (eMechanism == rtl_UriEncodeStrict
+ || eMechanism == rtl_UriEncodeStrictKeepEscapes)))
+ {
+ rtl_uString_new(pResult);
+ return;
+ }
+ break;
+
+ case rtl::uri::detail::EscapeChar:
+ if (eMechanism == rtl_UriEncodeCheckEscapes
+ && isValid(pCharClass, nUtf32)) // implies nUtf32 <= 0x7F
+ {
+ writeUnicode(pResult, &nCapacity,
+ static_cast< sal_Unicode >(nUtf32));
+ }
+ else if (!writeEscapeChar(
+ pResult, &nCapacity, nUtf32, eCharset,
+ (eMechanism == rtl_UriEncodeStrict
+ || eMechanism == rtl_UriEncodeStrictKeepEscapes)))
+ {
+ rtl_uString_new(pResult);
+ return;
+ }
+ break;
+
+ case rtl::uri::detail::EscapeOctet:
+ writeEscapeOctet(pResult, &nCapacity, nUtf32);
+ break;
+ }
+ }
+ *pResult = rtl_uStringBuffer_makeStringAndClear(pResult, &nCapacity);
+}
+
+void SAL_CALL rtl_uriDecode(rtl_uString * pText,
+ rtl_UriDecodeMechanism eMechanism,
+ rtl_TextEncoding eCharset, rtl_uString ** pResult)
+ SAL_THROW_EXTERN_C()
+{
+ switch (eMechanism)
+ {
+ case rtl_UriDecodeNone:
+ rtl_uString_assign(pResult, pText);
+ break;
+
+ case rtl_UriDecodeToIuri:
+ eCharset = RTL_TEXTENCODING_UTF8;
+ [[fallthrough]];
+ default: // rtl_UriDecodeWithCharset, rtl_UriDecodeStrict
+ {
+ sal_Unicode const * p = pText->buffer;
+ sal_Unicode const * pEnd = p + pText->length;
+ sal_Int32 nCapacity = pText->length;
+ rtl_uString_new_WithLength(pResult, nCapacity);
+
+ while (p < pEnd)
+ {
+ rtl::uri::detail::EscapeType eType;
+ sal_uInt32 nUtf32 = rtl::uri::detail::readUcs4(&p, pEnd, true, eCharset, &eType);
+ switch (eType)
+ {
+ case rtl::uri::detail::EscapeChar:
+ if (nUtf32 <= 0x7F && eMechanism == rtl_UriDecodeToIuri)
+ {
+ writeEscapeOctet(pResult, &nCapacity, nUtf32);
+ break;
+ }
+ [[fallthrough]];
+
+ case rtl::uri::detail::EscapeNo:
+ writeUcs4(pResult, &nCapacity, nUtf32);
+ break;
+
+ case rtl::uri::detail::EscapeOctet:
+ if (eMechanism == rtl_UriDecodeStrict)
+ {
+ rtl_uString_new(pResult);
+ return;
+ }
+ writeEscapeOctet(pResult, &nCapacity, nUtf32);
+ break;
+ }
+ }
+
+ *pResult = rtl_uStringBuffer_makeStringAndClear( pResult, &nCapacity );
+ }
+ break;
+ }
+}
+
+sal_Bool SAL_CALL rtl_uriConvertRelToAbs(rtl_uString * pBaseUriRef,
+ rtl_uString * pRelUriRef,
+ rtl_uString ** pResult,
+ rtl_uString ** pException)
+ SAL_THROW_EXTERN_C()
+{
+ // Use the strict parser algorithm from RFC 3986, section 5.2, to turn the
+ // relative URI into an absolute one:
+ Components aRelComponents;
+ parseUriRef(pRelUriRef, &aRelComponents);
+ OUStringBuffer aBuffer(256);
+
+ if (aRelComponents.aScheme.isPresent())
+ {
+ aBuffer.append(aRelComponents.aScheme.pBegin,
+ aRelComponents.aScheme.getLength());
+
+ if (aRelComponents.aAuthority.isPresent())
+ {
+ aBuffer.append(aRelComponents.aAuthority.pBegin,
+ aRelComponents.aAuthority.getLength());
+ }
+
+ appendPath(
+ aBuffer, aBuffer.getLength(), false, aRelComponents.aPath.pBegin,
+ aRelComponents.aPath.pEnd);
+
+ if (aRelComponents.aQuery.isPresent())
+ {
+ aBuffer.append(aRelComponents.aQuery.pBegin,
+ aRelComponents.aQuery.getLength());
+ }
+ }
+ else
+ {
+ Components aBaseComponents;
+ parseUriRef(pBaseUriRef, &aBaseComponents);
+ if (!aBaseComponents.aScheme.isPresent())
+ {
+ rtl_uString_assign(
+ pException,
+ (OUString(
+ "<" + OUString::unacquired(&pBaseUriRef)
+ + "> does not start with a scheme component")
+ .pData));
+ return false;
+ }
+
+ aBuffer.append(aBaseComponents.aScheme.pBegin,
+ aBaseComponents.aScheme.getLength());
+ if (aRelComponents.aAuthority.isPresent())
+ {
+ aBuffer.append(aRelComponents.aAuthority.pBegin,
+ aRelComponents.aAuthority.getLength());
+ appendPath(
+ aBuffer, aBuffer.getLength(), false,
+ aRelComponents.aPath.pBegin, aRelComponents.aPath.pEnd);
+
+ if (aRelComponents.aQuery.isPresent())
+ {
+ aBuffer.append(aRelComponents.aQuery.pBegin,
+ aRelComponents.aQuery.getLength());
+ }
+ }
+ else
+ {
+ if (aBaseComponents.aAuthority.isPresent())
+ {
+ aBuffer.append(aBaseComponents.aAuthority.pBegin,
+ aBaseComponents.aAuthority.getLength());
+ }
+
+ if (aRelComponents.aPath.pBegin == aRelComponents.aPath.pEnd)
+ {
+ aBuffer.append(aBaseComponents.aPath.pBegin,
+ aBaseComponents.aPath.getLength());
+ if (aRelComponents.aQuery.isPresent())
+ {
+ aBuffer.append(aRelComponents.aQuery.pBegin,
+ aRelComponents.aQuery.getLength());
+ }
+ else if (aBaseComponents.aQuery.isPresent())
+ {
+ aBuffer.append(aBaseComponents.aQuery.pBegin,
+ aBaseComponents.aQuery.getLength());
+ }
+ }
+ else
+ {
+ if (*aRelComponents.aPath.pBegin == '/')
+ {
+ appendPath(
+ aBuffer, aBuffer.getLength(), false,
+ aRelComponents.aPath.pBegin, aRelComponents.aPath.pEnd);
+ }
+ else if (aBaseComponents.aAuthority.isPresent()
+ && aBaseComponents.aPath.pBegin
+ == aBaseComponents.aPath.pEnd)
+ {
+ appendPath(
+ aBuffer, aBuffer.getLength(), true,
+ aRelComponents.aPath.pBegin, aRelComponents.aPath.pEnd);
+ }
+ else
+ {
+ sal_Int32 n = aBuffer.getLength();
+ sal_Int32 i = rtl_ustr_lastIndexOfChar_WithLength(
+ aBaseComponents.aPath.pBegin,
+ aBaseComponents.aPath.getLength(), '/');
+
+ if (i >= 0)
+ {
+ appendPath(
+ aBuffer, n, false, aBaseComponents.aPath.pBegin,
+ aBaseComponents.aPath.pBegin + i);
+ }
+
+ appendPath(
+ aBuffer, n, i >= 0, aRelComponents.aPath.pBegin,
+ aRelComponents.aPath.pEnd);
+ }
+
+ if (aRelComponents.aQuery.isPresent())
+ {
+ aBuffer.append(aRelComponents.aQuery.pBegin,
+ aRelComponents.aQuery.getLength());
+ }
+ }
+ }
+ }
+ if (aRelComponents.aFragment.isPresent())
+ {
+ aBuffer.append(aRelComponents.aFragment.pBegin,
+ aRelComponents.aFragment.getLength());
+ }
+
+ rtl_uString_assign(pResult, aBuffer.makeStringAndClear().pData);
+ return true;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */