Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 275 insertions, 0 deletions

diff --git a/include/ap_regex.h b/include/ap_regex.h
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--- /dev/null
+++ b/include/ap_regex.h
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+/* 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* This code is based on pcreposix.h from the PCRE Library distribution,
+ * as originally written by Philip Hazel <ph10@cam.ac.uk>, and forked by
+ * the Apache HTTP Server project to provide POSIX-style regex function
+ * wrappers around underlying PCRE library functions for httpd.
+ * 
+ * The original source file pcreposix.h is copyright and licensed as follows;
+
+            Copyright (c) 1997-2004 University of Cambridge
+
+-----------------------------------------------------------------------------
+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 University of Cambridge 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.
+-----------------------------------------------------------------------------
+*/
+
+/**
+ * @file ap_regex.h
+ * @brief Apache Regex defines
+ */
+
+#ifndef AP_REGEX_H
+#define AP_REGEX_H
+
+#include "apr.h"
+
+/* Allow for C++ users */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Options for ap_regcomp, ap_regexec, and ap_rxplus versions: */
+
+#define AP_REG_ICASE    0x01 /** use a case-insensitive match */
+#define AP_REG_NEWLINE  0x02 /** don't match newlines against '.' etc */
+#define AP_REG_NOTBOL   0x04 /** ^ will not match against start-of-string */
+#define AP_REG_NOTEOL   0x08 /** $ will not match against end-of-string */
+
+#define AP_REG_EXTENDED (0)  /** unused */
+#define AP_REG_NOSUB    (0)  /** unused */
+
+#define AP_REG_MULTI 0x10    /* perl's /g (needs fixing) */
+#define AP_REG_NOMEM 0x20    /* nomem in our code */
+#define AP_REG_DOTALL 0x40   /* perl's /s flag */
+
+#define AP_REG_DOLLAR_ENDONLY 0x200 /* '$' matches at end of subject string only */
+
+#define AP_REG_MATCH "MATCH_" /** suggested prefix for ap_regname */
+
+/* Error values: */
+enum {
+  AP_REG_ASSERT = 1,  /** internal error ? */
+  AP_REG_ESPACE,      /** failed to get memory */
+  AP_REG_INVARG,      /** invalid argument */
+  AP_REG_NOMATCH      /** match failed */
+};
+
+/* The structure representing a compiled regular expression. */
+typedef struct {
+    void *re_pcre;
+    int re_nsub;
+    apr_size_t re_erroffset;
+} ap_regex_t;
+
+/* The structure in which a captured offset is returned. */
+typedef struct {
+    int rm_so;
+    int rm_eo;
+} ap_regmatch_t;
+
+/* The functions */
+
+/**
+ * Get default compile flags
+ * @return Bitwise OR of AP_REG_* flags
+ */
+AP_DECLARE(int) ap_regcomp_get_default_cflags(void);
+
+/**
+ * Set default compile flags
+ * @param cflags Bitwise OR of AP_REG_* flags
+ */
+AP_DECLARE(void) ap_regcomp_set_default_cflags(int cflags);
+
+/**
+ * Get the AP_REG_* corresponding to the string.
+ * @param name The name (i.e. AP_REG_<name>)
+ * @return The AP_REG_*, or zero if the string is unknown
+ *
+ */
+AP_DECLARE(int) ap_regcomp_default_cflag_by_name(const char *name);
+
+/**
+ * Compile a regular expression.
+ * @param preg Returned compiled regex
+ * @param regex The regular expression string
+ * @param cflags Bitwise OR of AP_REG_* flags (ICASE and NEWLINE supported,
+ *                                             other flags are ignored)
+ * @return Zero on success or non-zero on error
+ */
+AP_DECLARE(int) ap_regcomp(ap_regex_t *preg, const char *regex, int cflags);
+
+/**
+ * Match a NUL-terminated string against a pre-compiled regex.
+ * @param preg The pre-compiled regex
+ * @param string The string to match
+ * @param nmatch Provide information regarding the location of any matches
+ * @param pmatch Provide information regarding the location of any matches
+ * @param eflags Bitwise OR of AP_REG_* flags (NOTBOL and NOTEOL supported,
+ *                                             other flags are ignored)
+ * @return 0 for successful match, \p AP_REG_NOMATCH otherwise
+ */
+AP_DECLARE(int) ap_regexec(const ap_regex_t *preg, const char *string,
+                           apr_size_t nmatch, ap_regmatch_t *pmatch, int eflags);
+
+/**
+ * Match a string with given length against a pre-compiled regex. The string
+ * does not need to be NUL-terminated.
+ * @param preg The pre-compiled regex
+ * @param buff The string to match
+ * @param len Length of the string to match
+ * @param nmatch Provide information regarding the location of any matches
+ * @param pmatch Provide information regarding the location of any matches
+ * @param eflags Bitwise OR of AP_REG_* flags (NOTBOL and NOTEOL supported,
+ *                                             other flags are ignored)
+ * @return 0 for successful match, AP_REG_NOMATCH otherwise
+ */
+AP_DECLARE(int) ap_regexec_len(const ap_regex_t *preg, const char *buff,
+                               apr_size_t len, apr_size_t nmatch,
+                               ap_regmatch_t *pmatch, int eflags);
+
+/**
+ * Return the error code returned by regcomp or regexec into error messages
+ * @param errcode the error code returned by regexec or regcomp
+ * @param preg The precompiled regex
+ * @param errbuf A buffer to store the error in
+ * @param errbuf_size The size of the buffer
+ */
+AP_DECLARE(apr_size_t) ap_regerror(int errcode, const ap_regex_t *preg,
+                                   char *errbuf, apr_size_t errbuf_size);
+
+/**
+ * Return an array of named regex backreferences
+ * @param preg The precompiled regex
+ * @param names The array to which the names will be added
+ * @param upper If non zero, uppercase the names
+ */
+AP_DECLARE(int) ap_regname(const ap_regex_t *preg,
+                           apr_array_header_t *names, const char *prefix,
+                           int upper);
+
+/** Destroy a pre-compiled regex.
+ * @param preg The pre-compiled regex to free.
+ */
+AP_DECLARE(void) ap_regfree(ap_regex_t *preg);
+
+/* ap_rxplus: higher-level regexps */
+
+typedef struct {
+    ap_regex_t rx;
+    apr_uint32_t flags;
+    const char *subs;
+    const char *match;
+    apr_size_t nmatch;
+    ap_regmatch_t *pmatch;
+} ap_rxplus_t;
+
+/**
+ * Compile a pattern into a regexp.
+ * supports perl-like formats
+ *    match-string
+ *    /match-string/flags
+ *    s/match-string/replacement-string/flags
+ *    Intended to support more perl-like stuff as and when round tuits happen
+ * match-string is anything supported by ap_regcomp
+ * replacement-string is a substitution string as supported in ap_pregsub
+ * flags should correspond with perl syntax: treat failure to do so as a bug
+ *                                           (documentation TBD)
+ * @param pool Pool to allocate from
+ * @param pattern Pattern to compile
+ * @return Compiled regexp, or NULL in case of compile/syntax error
+ */
+AP_DECLARE(ap_rxplus_t*) ap_rxplus_compile(apr_pool_t *pool, const char *pattern);
+/**
+ * Apply a regexp operation to a string.
+ * @param pool Pool to allocate from
+ * @param rx The regex match to apply
+ * @param pattern The string to apply it to
+ *                NOTE: This MUST be kept in scope to use regexp memory
+ * @param newpattern The modified string (ignored if the operation doesn't
+ *                                        modify the string)
+ * @return Number of times a match happens.  Normally 0 (no match) or 1
+ *         (match found), but may be greater if a transforming pattern
+ *         is applied with the 'g' flag.
+ */
+AP_DECLARE(int) ap_rxplus_exec(apr_pool_t *pool, ap_rxplus_t *rx,
+                               const char *pattern, char **newpattern);
+#ifdef DOXYGEN
+/**
+ * Number of matches in the regexp operation's memory
+ * This may be 0 if no match is in memory, or up to nmatch from compilation
+ * @param rx The regexp
+ * @return Number of matches in memory
+ */
+AP_DECLARE(int) ap_rxplus_nmatch(ap_rxplus_t *rx);
+#else
+#define ap_rxplus_nmatch(rx) (((rx)->match != NULL) ? (rx)->nmatch : 0)
+#endif
+/**
+ * Get a pointer to a match from regex memory
+ * NOTE: this relies on the match pattern from the last call to
+ *       ap_rxplus_exec still being valid (i.e. not freed or out-of-scope)
+ * @param rx The regexp
+ * @param n The match number to retrieve (must be between 0 and nmatch)
+ * @param len Returns the length of the match.
+ * @param match Returns the match pattern
+ */
+AP_DECLARE(void) ap_rxplus_match(ap_rxplus_t *rx, int n, int *len,
+                                 const char **match);
+/**
+ * Get a match from regex memory in a string copy
+ * NOTE: this relies on the match pattern from the last call to
+ *       ap_rxplus_exec still being valid (i.e. not freed or out-of-scope)
+ * @param pool Pool to allocate from
+ * @param rx The regexp
+ * @param n The match number to retrieve (must be between 0 and nmatch)
+ * @return The matched string
+ */
+AP_DECLARE(char*) ap_rxplus_pmatch(apr_pool_t *pool, ap_rxplus_t *rx, int n);
+
+#ifdef __cplusplus
+}   /* extern "C" */
+#endif
+
+#endif /* AP_REGEX_T */
+