/src/uriparser/src/UriResolve.c

Source
/*
 * uriparser - RFC 3986 URI parsing library
 *
 * Copyright (C) 2007, Weijia Song <songweijia@gmail.com>
 * Copyright (C) 2007, Sebastian Pipping <sebastian@pipping.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:
 *
 *     1. Redistributions  of  source  code   must  retain  the  above
 *        copyright notice, this list  of conditions and the following
 *        disclaimer.
 *
 *     2. 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.
 *
 *     3. Neither the  name of the  copyright holder 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 HOLDER  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 "UriResolve.c"
#    undef URI_PASS_ANSI
#  endif
#  ifdef URI_ENABLE_UNICODE
#    define URI_PASS_UNICODE 1
#    include "UriResolve.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"
#    include "UriMemory.h"
#  endif

/* Appends a relative URI to an absolute. The last path segment of
 * the absolute URI is replaced. */
static URI_INLINE UriBool URI_FUNC(MergePath)(URI_TYPE(Uri) * absWork,
        const URI_TYPE(Uri) * relAppend, UriMemoryManager * memory) {
    URI_TYPE(PathSegment) * sourceWalker;
    URI_TYPE(PathSegment) * destPrev;
    if (relAppend->pathHead == NULL) {
        return URI_TRUE;
    }

    /* Replace last segment ("" if trailing slash) with first of append chain */
    if (absWork->pathHead == NULL) {
        URI_TYPE(PathSegment) * const dup =
                memory->malloc(memory, sizeof(URI_TYPE(PathSegment)));
        if (dup == NULL) {
            return URI_FALSE; /* Raises malloc error */
        }
        dup->next = NULL;
        absWork->pathHead = dup;
        absWork->pathTail = dup;
    }
    absWork->pathTail->text.first = relAppend->pathHead->text.first;
    absWork->pathTail->text.afterLast = relAppend->pathHead->text.afterLast;

    /* Append all the others */
    sourceWalker = relAppend->pathHead->next;
    if (sourceWalker == NULL) {
        return URI_TRUE;
    }
    destPrev = absWork->pathTail;

    for (;;) {
        URI_TYPE(PathSegment) * const dup =
                memory->malloc(memory, sizeof(URI_TYPE(PathSegment)));
        if (dup == NULL) {
            destPrev->next = NULL;
            absWork->pathTail = destPrev;
            return URI_FALSE; /* Raises malloc error */
        }
        dup->text = sourceWalker->text;
        destPrev->next = dup;

        if (sourceWalker->next == NULL) {
            absWork->pathTail = dup;
            absWork->pathTail->next = NULL;
            break;
        }
        destPrev = dup;
        sourceWalker = sourceWalker->next;
    }

    return URI_TRUE;
}

static int URI_FUNC(ResolveAbsolutePathFlag)(
        URI_TYPE(Uri) * absWork, UriMemoryManager * memory) {
    if (absWork == NULL) {
        return URI_ERROR_NULL;
    }

    if (URI_FUNC(HasHost)(absWork) && absWork->absolutePath) {
        /* Empty segment needed, instead? */
        if (absWork->pathHead == NULL) {
            URI_TYPE(PathSegment) * const segment =
                    memory->malloc(memory, sizeof(URI_TYPE(PathSegment)));
            if (segment == NULL) {
                return URI_ERROR_MALLOC;
            }
            segment->text.first = URI_FUNC(SafeToPointTo);
            segment->text.afterLast = URI_FUNC(SafeToPointTo);
            segment->next = NULL;

            absWork->pathHead = segment;
            absWork->pathTail = segment;
        }

        absWork->absolutePath = URI_FALSE;
    }

    return URI_SUCCESS;
}

static int URI_FUNC(AddBaseUriImpl)(URI_TYPE(Uri) * absDest,
        const URI_TYPE(Uri) * relSource, const URI_TYPE(Uri) * absBase,
        UriResolutionOptions options, UriMemoryManager * memory) {
    UriBool relSourceHasScheme;

    if (absDest == NULL) {
        return URI_ERROR_NULL;
    }
    URI_FUNC(ResetUri)(absDest);

    if ((relSource == NULL) || (absBase == NULL)) {
        return URI_ERROR_NULL;
    }

    /* absBase absolute? */
    if (absBase->scheme.first == NULL) {
        return URI_ERROR_ADDBASE_REL_BASE;
    }

    /* NOTE: The curly brackets here force deeper indent (and that's all) */
    {
        {
            {
                /* clang-format off */
    /* [00/32] -- A non-strict parser may ignore a scheme in the reference */
    /* [00/32] -- if it is identical to the base URI's scheme. */
    /* [00/32] if ((not strict) and (R.scheme == Base.scheme)) then */
                /* clang-format on */
                relSourceHasScheme =
                        (relSource->scheme.first != NULL) ? URI_TRUE : URI_FALSE;
                if ((options & URI_RESOLVE_IDENTICAL_SCHEME_COMPAT)
                        && (absBase->scheme.first != NULL)
                        && (relSource->scheme.first != NULL)
                        && (URI_FUNC(RangeEquals)(
                                &(absBase->scheme), &(relSource->scheme)))) {
                    /* clang-format off */
    /* [00/32]     undefine(R.scheme); */
                    /* clang-format on */
                    relSourceHasScheme = URI_FALSE;
                    /* clang-format off */
    /* [00/32] endif; */
                    /* clang-format on */
                }

                /* clang-format off */
    /* [01/32] if defined(R.scheme) then */
                /* clang-format on */
                if (relSourceHasScheme) {
                    /* clang-format off */
    /* [02/32]     T.scheme = R.scheme; */
                    /* clang-format on */
                    absDest->scheme = relSource->scheme;
                    /* clang-format off */
    /* [03/32]     T.authority = R.authority; */
                    /* clang-format on */
                    if (!URI_FUNC(CopyAuthority)(absDest, relSource, memory)) {
                        return URI_ERROR_MALLOC;
                    }
                    /* clang-format off */
    /* [04/32]     T.path = remove_dot_segments(R.path); */
                    /* clang-format on */
                    if (!URI_FUNC(CopyPath)(absDest, relSource, memory)) {
                        return URI_ERROR_MALLOC;
                    }
                    if (!URI_FUNC(RemoveDotSegmentsAbsolute)(absDest, memory)) {
                        return URI_ERROR_MALLOC;
                    }
                    /* clang-format off */
    /* [05/32]     T.query = R.query; */
                    /* clang-format on */
                    absDest->query = relSource->query;
                    /* clang-format off */
    /* [06/32] else */
                    /* clang-format on */
                } else {
                    /* clang-format off */
    /* [07/32]     if defined(R.authority) then */
                    /* clang-format on */
                    if (URI_FUNC(HasHost)(relSource)) {
                        /* clang-format off */
    /* [08/32]         T.authority = R.authority; */
                        /* clang-format on */
                        if (!URI_FUNC(CopyAuthority)(absDest, relSource, memory)) {
                            return URI_ERROR_MALLOC;
                        }
                        /* clang-format off */
    /* [09/32]         T.path = remove_dot_segments(R.path); */
                        /* clang-format on */
                        if (!URI_FUNC(CopyPath)(absDest, relSource, memory)) {
                            return URI_ERROR_MALLOC;
                        }
                        if (!URI_FUNC(RemoveDotSegmentsAbsolute)(absDest, memory)) {
                            return URI_ERROR_MALLOC;
                        }
                        /* clang-format off */
    /* [10/32]         T.query = R.query; */
                        /* clang-format on */
                        absDest->query = relSource->query;
                        /* clang-format off */
    /* [11/32]     else */
                        /* clang-format on */
                    } else {
                        /* clang-format off */
    /* [28/32]         T.authority = Base.authority; */
                        /* clang-format on */
                        if (!URI_FUNC(CopyAuthority)(absDest, absBase, memory)) {
                            return URI_ERROR_MALLOC;
                        }
                        /* clang-format off */
    /* [12/32]         if (R.path == "") then */
                        /* clang-format on */
                        if (relSource->pathHead == NULL && !relSource->absolutePath) {
                            /* clang-format off */
    /* [13/32]             T.path = Base.path; */
                            /* clang-format on */
                            if (!URI_FUNC(CopyPath)(absDest, absBase, memory)) {
                                return URI_ERROR_MALLOC;
                            }
                            /* clang-format off */
    /* [14/32]             if defined(R.query) then */
                            /* clang-format on */
                            if (relSource->query.first != NULL) {
                                /* clang-format off */
    /* [15/32]                 T.query = R.query; */
                                /* clang-format on */
                                absDest->query = relSource->query;
                                /* clang-format off */
    /* [16/32]             else */
                                /* clang-format on */
                            } else {
                                /* clang-format off */
    /* [17/32]                 T.query = Base.query; */
                                /* clang-format on */
                                absDest->query = absBase->query;
                                /* clang-format off */
    /* [18/32]             endif; */
                                /* clang-format on */
                            }
                            /* clang-format off */
    /* [19/32]         else */
                            /* clang-format on */
                        } else {
                            /* clang-format off */
    /* [20/32]             if (R.path starts-with "/") then */
                            /* clang-format on */
                            if (relSource->absolutePath) {
                                int res;
                                /* clang-format off */
    /* [21/32]                 T.path = remove_dot_segments(R.path); */
                                /* clang-format on */
                                if (!URI_FUNC(CopyPath)(absDest, relSource, memory)) {
                                    return URI_ERROR_MALLOC;
                                }
                                res = URI_FUNC(ResolveAbsolutePathFlag)(absDest, memory);
                                if (res != URI_SUCCESS) {
                                    return res;
                                }
                                if (!URI_FUNC(RemoveDotSegmentsAbsolute)(
                                            absDest, memory)) {
                                    return URI_ERROR_MALLOC;
                                }
                                /* clang-format off */
    /* [22/32]             else */
                                /* clang-format on */
                            } else {
                                /* clang-format off */
    /* [23/32]                 T.path = merge(Base.path, R.path); */
                                /* clang-format on */
                                if (!URI_FUNC(CopyPath)(absDest, absBase, memory)) {
                                    return URI_ERROR_MALLOC;
                                }
                                if (!URI_FUNC(MergePath)(absDest, relSource, memory)) {
                                    return URI_ERROR_MALLOC;
                                }
                                /* clang-format off */
    /* [24/32]                 T.path = remove_dot_segments(T.path); */
                                /* clang-format on */
                                if (!URI_FUNC(RemoveDotSegmentsAbsolute)(
                                            absDest, memory)) {
                                    return URI_ERROR_MALLOC;
                                }

                                if (!URI_FUNC(FixAmbiguity)(absDest, memory)) {
                                    return URI_ERROR_MALLOC;
                                }
                                /* clang-format off */
    /* [25/32]             endif; */
                            }
    /* clang-format off */
    /* [26/32]             T.query = R.query; */
                            /* clang-format on */
                            absDest->query = relSource->query;
                            /* clang-format off */
    /* [27/32]         endif; */
                            /* clang-format on */
                        }
                        URI_FUNC(FixEmptyTrailSegment)(absDest, memory);
                        /* clang-format off */
    /* [29/32]     endif; */
                        /* clang-format on */
                    }
                    /* clang-format off */
    /* [30/32]     T.scheme = Base.scheme; */
                    /* clang-format on */
                    absDest->scheme = absBase->scheme;
                    /* clang-format off */
    /* [31/32] endif; */
                    /* clang-format on */
                }
                /* clang-format off */
    /* [32/32] T.fragment = R.fragment; */
                /* clang-format on */
                absDest->fragment = relSource->fragment;
            }
        }
    }
    return URI_SUCCESS;
}

int URI_FUNC(AddBaseUri)(URI_TYPE(Uri) * absDest, const URI_TYPE(Uri) * relSource,
        const URI_TYPE(Uri) * absBase) {
    const UriResolutionOptions options = URI_RESOLVE_STRICTLY;
    return URI_FUNC(AddBaseUriEx)(absDest, relSource, absBase, options);
}

int URI_FUNC(AddBaseUriEx)(URI_TYPE(Uri) * absDest, const URI_TYPE(Uri) * relSource,
        const URI_TYPE(Uri) * absBase, UriResolutionOptions options) {
    return URI_FUNC(AddBaseUriExMm)(absDest, relSource, absBase, options, NULL);
}

int URI_FUNC(AddBaseUriExMm)(URI_TYPE(Uri) * absDest, const URI_TYPE(Uri) * relSource,
        const URI_TYPE(Uri) * absBase, UriResolutionOptions options,
        UriMemoryManager * memory) {
    int res;

    URI_CHECK_MEMORY_MANAGER(memory); /* may return */

    res = URI_FUNC(AddBaseUriImpl)(absDest, relSource, absBase, options, memory);
    if ((res != URI_SUCCESS) && (absDest != NULL)) {
        URI_FUNC(FreeUriMembersMm)(absDest, memory);
    }
    return res;
}

#endif

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Created: 2026-08-03 06:54