path: root/fpcsrc/packages/httpd24/src/ap_regex.inc

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{* Derived from PCRE's pcreposix.h.

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{**
 * @file ap_regex.h
 * @brief Apache Regex defines
 *}

//#ifndef AP_REGEX_H
//#define AP_REGEX_H

//#include "apr.h"

//* Allow for C++ users */

//* Options for ap_regcomp, ap_regexec, and ap_rxplus versions: */
const
  AP_REG_ICASE    = $01; //** use a case-insensitive match */
  AP_REG_NEWLINE  = $02; //** don't match newlines against '.' etc */
  AP_REG_NOTBOL   = $04; //** ^ will not match against start-of-string */
  AP_REG_NOTEOL   = $08; //** $ will not match against end-of-string */

  AP_REG_EXTENDED = 0;   //** unused */
  AP_REG_NOSUB    = 0;   //** unused */

  AP_REG_MULTI    = $10; //* perl's /g (needs fixing) */
  AP_REG_NOMEM    = $20; //* nomem in our code */
  AP_REG_DOTALL   = $40; //* perl's /s flag */

//* Error values: */
  AP_REG_ASSERT   = 1;//** internal error ? */
  AP_REG_ESPACE   = 2;//** failed to get memory */
  AP_REG_INVARG   = 3;//** invalid argument */
  AP_REG_NOMATCH  = 4;//** match failed */

//* The structure representing a compiled regular expression. */
type
  Pap_regex_t = ^ap_regex_t;
  ap_regex_t = record
    re_pcre: Pointer;
    re_nsub: Integer;
    re_erroffset: apr_size_t;
  end;

//* The structure in which a captured offset is returned. */
  Pap_regmatch_t = ^ap_regmatch_t;
  ap_regmatch_t = record
    rm_so: Integer;
    rm_eo: Integer;
  end;

//* The functions */

{**
 * 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);
function ap_regcomp(preg: Pap_regex_t; const regex: PChar; cflags: Integer): Integer;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_regcomp' + LibSuff12;

{**
 * 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);
function ap_regexec(const preg: Pap_regex_t; const string_: PChar;
                    nmatch: apr_size_t; pmatch: Pap_regmatch_t; eflags: Integer): Integer;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_regexec' + LibSuff20;

{**
 * 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);
function ap_regexec_len(const preg: Pap_regex_t; const buff: PChar;
                        len, nmatch: apr_size_t;
                        pmatch: Pap_regmatch_t; eflags: Integer): Integer;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_regexec_len' + LibSuff24;

{**
 * 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);
function ap_regerror(errcode: Integer; const preg: Pap_regex_t;
                     errbuf: PChar; errbuf_size: apr_size_t): apr_size_t;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_regerror' + LibSuff16;

{** Destroy a pre-compiled regex.
 * @param preg The pre-compiled regex to free.
 *}
//AP_DECLARE(void) ap_regfree(ap_regex_t *preg);
procedure ap_regfree(preg: Pap_regex_t);
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_regfree' + LibSuff4;

//* ap_rxplus: higher-level regexps */
type
  Pap_rxplus_t = ^ap_rxplus_t;
  ap_rxplus_t = record
    rx: ap_regex_t;
    flags: apr_uint32_t;
    subs,
    match: PChar;
    nmatch: apr_size_t;
    pmatch: Pap_regmatch_t;
  end;{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);
function ap_rxplus_compile(pool: Papr_pool_t; const pattern: PChar): Pap_rxplus_t;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_rxplus_compile' + LibSuff8;

{**
 * 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);
function ap_rxplus_exec(pool: Papr_pool_t; rx: Pap_rxplus_t;
                        const pattern: PChar; newpattern: PPChar): Integer;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_rxplus_exec' + LibSuff16;

{#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);
procedure ap_rxplus_match(rx: Pap_rxplus_t; len: Integer;
                          const match: PPChar);
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_rxplus_match' + LibSuff16;

{**
 * 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);
//
function ap_rxplus_pmatch(pool: Papr_pool_t; rx: Pap_rxplus_t; n: Integer): PChar;
  {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  external LibHTTPD name LibNamePrefix + 'ap_rxplus_pmatch' + LibSuff12;

//#endif /* AP_REGEX_T */