C++ pcre_get_substring函数代码示例

void TGielda::Refresh_data_onet()
{
	/* FIXME: jesli spolka, umarla ( jej cena to --- ) to nie zostanie
	 * to sparsowane poprawnie i pominieta zostanie kolejna spolka
	 * now blad - onet chyba teraz pokazuje cene w "[]", trzeba poprawic regexp
	 */
	char* bufor = NULL;
	pcre* re;
	const char* error = NULL;
	int erroffset;
	int index = 0;
	int rc;
	const int OVECCOUNT = 30;
	int ovector[OVECCOUNT];
	char* pozycja;

	bufor = Download_file(curl, "http://gielda.onet.pl/indeksy-i-akcje,18633,100,0,notowania-gpw-start");
	my_companies.clear();
	my_companies.reserve(512);
	do
	{
		re = pcre_compile("<div class=\"name2\"><a.*?>(.*?)<.*?raitings.*?>\\s*?\\[?([-0-9, ]+)\\]?\\s*?<.*?raitings.*?>\\s*?\\[?([-0-9,]+)\\]?\\s*?<",
		PCRE_DOTALL, &error, &erroffset, NULL);
		rc = pcre_exec(re, NULL, bufor + index, strlen(bufor + index), 0, 0, ovector,
			OVECCOUNT);
		if (rc == PCRE_ERROR_NOMATCH)
			break;
		if (rc < 0)
			break;
		if (rc == 0)
			puts("za malo miejsca w buforze");
		
		char* name;
		char* price;
		char* day_delta;
		pcre_get_substring(bufor + index, ovector, rc, 1, (const char** )&name);
		pcre_get_substring(bufor + index, ovector, rc, 2, (const char** )&price);
		pcre_get_substring(bufor + index, ovector, rc, 3, (const char** )&day_delta);
		
		if ((pozycja = strchr(day_delta, ',')))
			*pozycja = '.';
		if ((pozycja = strchr(price, ',')))
			*pozycja = '.';
		char* price_replaced = Replace_all(price, " ", "");
		
		TSpolka spolka(name,
			price_replaced ? price_replaced : price,
			day_delta, "", "", "", "", "");
		my_companies.push_back(spolka);

		pcre_free_substring(name);
		pcre_free_substring(price);
		pcre_free_substring(day_delta);

		 index += ovector[1];
	}
	while (true);
	my_last_update = time(NULL);
	delete[] bufor;
}

static int DetectPayloadLenFieldParse(DetectPayloadLenFieldData *dt, const char * sig) {
	char *args[3] = {NULL,NULL,NULL};
	#define MAX_SUBSTRINGS 30
	int ret = 0, res = 0;
	int ov[MAX_SUBSTRINGS];

	dt->offset = 0;

	ret = pcre_exec(parse_regex, parse_regex_study, sig, strlen(sig), 0, 0, ov, MAX_SUBSTRINGS);
	if (ret < 3) goto error;

	const char *str_ptr;
	pcre_get_substring(sig, ov, MAX_SUBSTRINGS, 1, &str_ptr);
	if (strlen(str_ptr)) {
		dt->offset = atoi(str_ptr);
	}

	pcre_get_substring(sig, ov, MAX_SUBSTRINGS, 2, &str_ptr);
	if (strlen(str_ptr)) {
		dt->len = atoi(str_ptr);
	}

	return 1;

error:
	return -1;
}

static char *
ccze_squid_cache_log_process (const char *str, int *offsets, int match)
{
  char *date, *other;

  pcre_get_substring (str, offsets, match, 1, (const char **)&date);
  pcre_get_substring (str, offsets, match, 3, (const char **)&other);

  ccze_addstr (CCZE_COLOR_DATE, date);
  ccze_space();

  free (date);
  return other;
}

static int DetectPrioritySetup (DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
{
    const char *prio_str = NULL;

#define MAX_SUBSTRINGS 30
    int ret = 0;
    int ov[MAX_SUBSTRINGS];

    ret = pcre_exec(regex, regex_study, rawstr, strlen(rawstr), 0, 0, ov, 30);
    if (ret < 0) {
        SCLogError(SC_ERR_PCRE_MATCH, "Invalid Priority in Signature "
                     "- %s", rawstr);
        return -1;
    }

    ret = pcre_get_substring((char *)rawstr, ov, 30, 1, &prio_str);
    if (ret < 0) {
        SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
        return -1;
    }

    /* if we have reached here, we have had a valid priority.  Assign it */
    s->prio = atoi(prio_str);

    return 0;
}

// < 0 for error.  >= 0 for len of extracted string
int extractHTTPClientHeaderVal(const u_int8_t *buf, u_int32_t size, int pcreidx, int substringnum, char *valuebuf, int valuelen) {
   int result;
   int ovector[9];
   int ovecsize = 9;
   const char *tmpstring;

//   printf("Searching for pcre %d (%s)\n", pcreidx, http_pcre_strings[pcreidx]);

   result = pcre_exec(http_pcre_structs[pcreidx].re, http_pcre_structs[pcreidx].pe,
                      (const char *)buf, size, 0, 0, ovector, ovecsize);

   if(result < 0 || result == PCRE_ERROR_NOMATCH) {
//      printf("pcre not found\n");
      return(-1); // We need to find the URL or this isn't a valid request
   }

   if(valuebuf) {
      result = pcre_get_substring((const char *)buf, ovector, result, substringnum, &tmpstring);
      if(result < 0) {
//         printf("unable to extract substring\n");
         return(-2);
      }

      strncpy(valuebuf, tmpstring, valuelen);
      valuebuf[valuelen-1] = '\0';

      pcre_free_substring(tmpstring);
      return(strlen(valuebuf));
   }

   return(0);
}

char *Regexp_Get_Substring_From_Buffer(pcre *regexp, char *buffer, int substring)
{
	char *file;
	int rc, ovector[30];
	char *viewstate;

	if (regexp == NULL)
		return NULL;

	if (buffer == NULL)
		return NULL;

	rc = pcre_exec(regexp, NULL, buffer, strlen(file), 0, 0, ovector, 30);
	if (rc != -1)
	{
		rc = pcre_get_substring(buffer, ovector, 30, substring, (const char **)&viewstate);
		if (rc != -1)
		{
			return viewstate;
		}
		else
			printf("Get_Regexp_From_File: could not get substring.\n");
	}
	else
		printf("Get_Regexp_From_File: regexp didnt match.\n");

	return NULL;
}

std::string Pattern::group (int groupNumber)
{
    const char * stringPtr;

    int rc = pcre_get_substring (
                 _subject.substr (_offset[0]).c_str(),
                 _ovector,
                 _count,
                 groupNumber,
                 &stringPtr);

    if (rc < 0) {
        switch (rc) {

            case PCRE_ERROR_NOSUBSTRING:
                throw std::out_of_range ("Invalid group reference.");

            case PCRE_ERROR_NOMEMORY:
                throw match_error ("Memory exhausted.");

            default:
                throw match_error ("Failed to get named substring.");
        }
    }

    std::string matchedStr (stringPtr);

    pcre_free_substring (stringPtr);

    return matchedStr;
}

static uint32_t nvmRegExpCoproTestPattern (uint16_t pattern_id, uint8_t *haystack, uint32_t haylen,
							uint32_t start_offset, nvmRegExpCoproInternalData *redata) {
	nvmRegExpCoproPattern *rcp;
	int ovector[OVECTSIZE], m  = 0, matchoffset = 0; //, matchlen = 0;
#ifdef COPRO_REGEXP_DEBUG
			const char *tmp;
#endif
	redata -> matched = 0;

	/* Do the actual search */
	if (pattern_id < redata -> patterns_no) {
		rcp = &(redata -> patterns[pattern_id]);
		redebug ("Looking for RegExp: \"%s\"\n", rcp -> pattern);
		m = pcre_exec (rcp -> re, rcp -> re_extra, (char*) haystack + start_offset, haylen, 0, 0, ovector, OVECTSIZE);
		if (m > 0) {
			(redata -> match).rcp = rcp;
			(redata -> match).offset = matchoffset = ovector[0];
			(redata -> match).len = ovector[1] - ovector[0];
			redata -> matched = 1;
#ifdef COPRO_REGEXP_DEBUG
			pcre_get_substring (haystack + start_offset, ovector, m, 0, &tmp);
			redebug ("RegExp match at offset %d, len = %d: \"%s\"\n", matchoffset, (redata -> match).len, tmp);
			pcre_free_substring (tmp);
#endif
		}
	} else {
		printf ("RegExp coprocessor: tried to use inexistent pattern: %u\n", pattern_id);
	}

	return (redata -> matched);
}

char *execute_regex(char *pattern, char *subject, int desired_match)
{
    pcre *re;
    const char *einfo;
    int eoffset;
    int stringcount = 0;
    int ovector[desired_match * 3];
    int match_len;
    const char *match;
    char *match_returned;
    re = pcre_compile(pattern, 0, &einfo, &eoffset, NULL);
    if (!re) {
	fprintf(stderr, "%s\n", einfo);
	return NULL;
    }

    stringcount = pcre_exec(re, NULL, subject, strlen(subject),
			    0, 0, ovector, 30);

    match_len = pcre_get_substring(subject, ovector,
				   stringcount, desired_match, &match);
    if (match_len <= 0) {

	return NULL;
    }

    match_returned = (char *) malloc(match_len);
    strncpy(match_returned, match, match_len);
    pcre_free_substring(match);
    return match_returned;

}

/** Funkcja pobiera pierwszy czlon adresu email - tytulowy adresat w tresci maila
@param email - adres email z którego pobrany zostanie człon adresu przed znakiem '@'
@param out_recipient - nazwa konta email pobrana z adresu - wartość zwracana przez funkcję
@retval 0 - ok
@retval -1 - bład wywołania funkcji pcre_compile
@retval -2 - bład wywołania funkcji pcre_exec
*/
long get_einvoice_recipient(char *email,char **out_recipient)
{
	pcre *rc			= NULL;
	long re 			= 0;
	const char *error		= NULL;
	int erroroffset			= 0;
	int ovector[6];
	long len			= 0;
	
	memset(ovector,0,6);
	rc=pcre_compile(EINVOICE_RECP_REGEXP,0,&error, &erroroffset,NULL);

	if(rc==NULL)
	{
		PRINT_DEBUG("LIBBMDMAILERR Error. Error=%i\n",-1);
		return -1;
	}
	
	re = pcre_exec(rc,NULL,email,(int)strlen(email),0,0,ovector,6);
	if(re<0)
	{
		PRINT_DEBUG("LIBBMDMAILERR Error. Error=%i\n",-2);
		return -2;
	}
	
	len=pcre_get_substring(email,ovector,re,1,(const char **)out_recipient);
	
	pcre_free(rc);
	rc=NULL;
	return 0;
}

/**
 * \brief This function is used to parse icmp_seq option passed via icmp_seq: keyword
 *
 * \param icmpseqstr Pointer to the user provided icmp_seq options
 *
 * \retval iseq pointer to DetectIcmpSeqData on success
 * \retval NULL on failure
 */
DetectIcmpSeqData *DetectIcmpSeqParse (char *icmpseqstr) {
    DetectIcmpSeqData *iseq = NULL;
    char *substr[3] = {NULL, NULL, NULL};
#define MAX_SUBSTRINGS 30
    int ret = 0, res = 0;
    int ov[MAX_SUBSTRINGS];
    int i;
    const char *str_ptr;

    ret = pcre_exec(parse_regex, parse_regex_study, icmpseqstr, strlen(icmpseqstr), 0, 0, ov, MAX_SUBSTRINGS);
    if (ret < 1 || ret > 4) {
        SCLogError(SC_ERR_PCRE_MATCH,"Parse error %s", icmpseqstr);
        goto error;
    }

    for (i = 1; i < ret; i++) {
        res = pcre_get_substring((char *)icmpseqstr, ov, MAX_SUBSTRINGS, i, &str_ptr);
        if (res < 0) {
            SCLogError(SC_ERR_PCRE_GET_SUBSTRING,"pcre_get_substring failed");
            goto error;
        }
        substr[i-1] = (char *)str_ptr;
    }

    iseq = SCMalloc(sizeof(DetectIcmpSeqData));
    if (iseq == NULL)
        goto error;

    iseq->seq = 0;

    if (substr[0] != NULL && strlen(substr[0]) != 0) {
        if (substr[2] == NULL) {
            SCLogError(SC_ERR_MISSING_QUOTE,"Missing quote in input");
            goto error;
        }
    } else {
        if (substr[2] != NULL) {
            SCLogError(SC_ERR_MISSING_QUOTE,"Missing quote in input");
            goto error;
        }
    }

    uint16_t seq = 0;
    ByteExtractStringUint16(&seq, 10, 0, substr[1]);
    iseq->seq = htons(seq);

    for (i = 0; i < 3; i++) {
        if (substr[i] != NULL) SCFree(substr[i]);
    }

    return iseq;

error:
    for (i = 0; i < 3; i++) {
        if (substr[i] != NULL) SCFree(substr[i]);
    }
    if (iseq != NULL) DetectIcmpSeqFree(iseq);
    return NULL;

}

/**
 * \brief This function is used to parse icmp_id option passed via icmp_id: keyword
 *
 * \param icmpidstr Pointer to the user provided icmp_id options
 *
 * \retval iid pointer to DetectIcmpIdData on success
 * \retval NULL on failure
 */
DetectIcmpIdData *DetectIcmpIdParse (char *icmpidstr) {
    DetectIcmpIdData *iid = NULL;
    char *substr[3] = {NULL, NULL, NULL};
#define MAX_SUBSTRINGS 30
    int ret = 0, res = 0;
    int ov[MAX_SUBSTRINGS];

    ret = pcre_exec(parse_regex, parse_regex_study, icmpidstr, strlen(icmpidstr), 0, 0, ov, MAX_SUBSTRINGS);
    if (ret < 1 || ret > 4) {
        SCLogError(SC_ERR_PCRE_MATCH, "Parse error %s", icmpidstr);
        goto error;
    }

    int i;
    const char *str_ptr;
    for (i = 1; i < ret; i++) {
        res = pcre_get_substring((char *)icmpidstr, ov, MAX_SUBSTRINGS, i, &str_ptr);
        if (res < 0) {
            SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
            goto error;
        }
        substr[i-1] = (char *)str_ptr;
    }

    iid = SCMalloc(sizeof(DetectIcmpIdData));
    if (iid == NULL)
        goto error;
    iid->id = 0;

    if (substr[0]!= NULL && strlen(substr[0]) != 0) {
        if (substr[2] == NULL) {
            SCLogError(SC_ERR_INVALID_ARGUMENT, "Missing close quote in input");
            goto error;
        }
    } else {
        if (substr[2] != NULL) {
            SCLogError(SC_ERR_INVALID_ARGUMENT, "Missing open quote in input");
            goto error;
        }
    }

    /** \todo can ByteExtractStringUint16 do this? */
    uint16_t id = 0;
    ByteExtractStringUint16(&id, 10, 0, substr[1]);
    iid->id = htons(id);

    for (i = 0; i < 3; i++) {
        if (substr[i] != NULL) SCFree(substr[i]);
    }
    return iid;

error:
    for (i = 0; i < 3; i++) {
        if (substr[i] != NULL) SCFree(substr[i]);
    }
    if (iid != NULL) DetectIcmpIdFree(iid);
    return NULL;

}

int
pcre_get_named_substring(const pcre *code, const pcre_char *subject, int *ovector,
  int stringcount, const pcre_char *stringname, const pcre_char **stringptr)
{
int n = pcre_get_stringnumber(code, stringname);
if (n <= 0) return n;
return pcre_get_substring(subject, ovector, stringcount, n, stringptr);
}

int
pcre_get_named_substring(const pcre *code, const char *subject, int *ovector,
  int stringcount, const char *stringname, const char **stringptr)
{
int n = get_first_set(code, stringname, ovector);
if (n <= 0) return n;
return pcre_get_substring(subject, ovector, stringcount, n, stringptr);
}

/** Extract a subcapture value from the request
 *
 * @note This is the PCRE variant of the function.
 *
 * @param[in] ctx	To allocate subcapture buffer in.
 * @param[out] out	Where to write the subcapture string.
 * @param[in] request	to extract.
 * @param[in] num	Subcapture index (0 for entire match).
 * @return
 *	- 0 on success.
 *	- -1 on notfound.
 */
int regex_request_to_sub(TALLOC_CTX *ctx, char **out, REQUEST *request, uint32_t num)
{
	fr_regcapture_t	*rc;
	char const	*p;
	int		ret;

	rc = request_data_reference(request, request, REQUEST_DATA_REGEX);
	if (!rc) {
		RDEBUG4("No subcapture data found");
		*out = NULL;
		return 1;
	}

	ret = pcre_get_substring(rc->regmatch->subject,
				 (int *)rc->regmatch->match_data, (int)rc->regmatch->used, num, &p);
	switch (ret) {
	case PCRE_ERROR_NOMEMORY:
		MEM(NULL);
		/*
		 *	We can't really fall through, but GCC 7.3 is
		 *	too stupid to realise that we can never get
		 *	here despite _fr_exit_now being marked as
		 *	NEVER_RETURNS.
		 *
		 *	If we did anything else, compilers and static
		 *	analysis tools would probably complain about
		 *	code that could never be executed *sigh*.
		 */
		/* FALL-THROUGH */

	/*
	 *	Not finding a substring is fine
	 */
	case PCRE_ERROR_NOSUBSTRING:
		RDEBUG4("%i/%zu Not found", num + 1, rc->regmatch->used);
		*out = NULL;
		return -1;

	default:
		if (ret < 0) {
			*out = NULL;
			return -1;
		}

		talloc_set_type(p, char);
		p = talloc_steal(ctx, p);

		RDEBUG4("%i/%zu Found: %pV (%zu)", num + 1, rc->regmatch->used,
			fr_box_strvalue_buffer(p), talloc_array_length(p) - 1);

		memcpy(out, &p, sizeof(*out));
		break;
	}

	return 0;
}